switch to tinyobj and nanovg from assimp and cairo

33 files changed, 0 insertions, 16718 deletions

diff --git a/libs/assimp/code/AssetLib/FBX/FBXAnimation.cpp b/libs/assimp/code/AssetLib/FBX/FBXAnimation.cpp
deleted file mode 100644
index 2fa3b7b..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXAnimation.cpp
+++ /dev/null
@@ -1,290 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXAnimation.cpp
- *  @brief Assimp::FBX::AnimationCurve, Assimp::FBX::AnimationCurveNode,
- *         Assimp::FBX::AnimationLayer, Assimp::FBX::AnimationStack
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXDocument.h"
-#include "FBXDocumentUtil.h"
-#include "FBXImporter.h"
-#include "FBXParser.h"
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-AnimationCurve::AnimationCurve(uint64_t id, const Element &element, const std::string &name, const Document & /*doc*/) :
-        Object(id, element, name) {
-    const Scope &sc = GetRequiredScope(element);
-    const Element &KeyTime = GetRequiredElement(sc, "KeyTime");
-    const Element &KeyValueFloat = GetRequiredElement(sc, "KeyValueFloat");
-
-    ParseVectorDataArray(keys, KeyTime);
-    ParseVectorDataArray(values, KeyValueFloat);
-
-    if (keys.size() != values.size()) {
-        DOMError("the number of key times does not match the number of keyframe values", &KeyTime);
-    }
-
-    // check if the key times are well-ordered
-    if (!std::equal(keys.begin(), keys.end() - 1, keys.begin() + 1, std::less<KeyTimeList::value_type>())) {
-        DOMError("the keyframes are not in ascending order", &KeyTime);
-    }
-
-    const Element *KeyAttrDataFloat = sc["KeyAttrDataFloat"];
-    if (KeyAttrDataFloat) {
-        ParseVectorDataArray(attributes, *KeyAttrDataFloat);
-    }
-
-    const Element *KeyAttrFlags = sc["KeyAttrFlags"];
-    if (KeyAttrFlags) {
-        ParseVectorDataArray(flags, *KeyAttrFlags);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationCurve::~AnimationCurve() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationCurveNode::AnimationCurveNode(uint64_t id, const Element &element, const std::string &name,
-        const Document &doc, const char *const *target_prop_whitelist /*= nullptr*/,
-        size_t whitelist_size /*= 0*/) :
-        Object(id, element, name), target(), doc(doc) {
-    const Scope &sc = GetRequiredScope(element);
-
-    // find target node
-    const char *whitelist[] = { "Model", "NodeAttribute", "Deformer" };
-    const std::vector<const Connection *> &conns = doc.GetConnectionsBySourceSequenced(ID(), whitelist, 3);
-
-    for (const Connection *con : conns) {
-
-        // link should go for a property
-        if (!con->PropertyName().length()) {
-            continue;
-        }
-
-        if (target_prop_whitelist) {
-            const char *const s = con->PropertyName().c_str();
-            bool ok = false;
-            for (size_t i = 0; i < whitelist_size; ++i) {
-                if (!strcmp(s, target_prop_whitelist[i])) {
-                    ok = true;
-                    break;
-                }
-            }
-
-            if (!ok) {
-                throw std::range_error("AnimationCurveNode target property is not in whitelist");
-            }
-        }
-
-        const Object *const ob = con->DestinationObject();
-        if (!ob) {
-            DOMWarning("failed to read destination object for AnimationCurveNode->Model link, ignoring", &element);
-            continue;
-        }
-
-        target = ob;
-        if (!target) {
-            continue;
-        }
-
-        prop = con->PropertyName();
-        break;
-    }
-
-    if (!target) {
-        DOMWarning("failed to resolve target Model/NodeAttribute/Constraint for AnimationCurveNode", &element);
-    }
-
-    props = GetPropertyTable(doc, "AnimationCurveNode.FbxAnimCurveNode", element, sc, false);
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationCurveNode::~AnimationCurveNode() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-const AnimationCurveMap &AnimationCurveNode::Curves() const {
-    if (curves.empty()) {
-        // resolve attached animation curves
-        const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(ID(), "AnimationCurve");
-
-        for (const Connection *con : conns) {
-
-            // link should go for a property
-            if (!con->PropertyName().length()) {
-                continue;
-            }
-
-            const Object *const ob = con->SourceObject();
-            if (nullptr == ob) {
-                DOMWarning("failed to read source object for AnimationCurve->AnimationCurveNode link, ignoring", &element);
-                continue;
-            }
-
-            const AnimationCurve *const anim = dynamic_cast<const AnimationCurve *>(ob);
-            if (nullptr == anim) {
-                DOMWarning("source object for ->AnimationCurveNode link is not an AnimationCurve", &element);
-                continue;
-            }
-
-            curves[con->PropertyName()] = anim;
-        }
-    }
-
-    return curves;
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationLayer::AnimationLayer(uint64_t id, const Element &element, const std::string &name, const Document &doc) :
-        Object(id, element, name), doc(doc) {
-    const Scope &sc = GetRequiredScope(element);
-
-    // note: the props table here bears little importance and is usually absent
-    props = GetPropertyTable(doc, "AnimationLayer.FbxAnimLayer", element, sc, true);
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationLayer::~AnimationLayer() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationCurveNodeList AnimationLayer::Nodes(const char *const *target_prop_whitelist /*= nullptr*/,
-        size_t whitelist_size /*= 0*/) const {
-    AnimationCurveNodeList nodes;
-
-    // resolve attached animation nodes
-    const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(ID(), "AnimationCurveNode");
-    nodes.reserve(conns.size());
-
-    for (const Connection *con : conns) {
-
-        // link should not go to a property
-        if (con->PropertyName().length()) {
-            continue;
-        }
-
-        const Object *const ob = con->SourceObject();
-        if (!ob) {
-            DOMWarning("failed to read source object for AnimationCurveNode->AnimationLayer link, ignoring", &element);
-            continue;
-        }
-
-        const AnimationCurveNode *const anim = dynamic_cast<const AnimationCurveNode *>(ob);
-        if (!anim) {
-            DOMWarning("source object for ->AnimationLayer link is not an AnimationCurveNode", &element);
-            continue;
-        }
-
-        if (target_prop_whitelist) {
-            const char *s = anim->TargetProperty().c_str();
-            bool ok = false;
-            for (size_t i = 0; i < whitelist_size; ++i) {
-                if (!strcmp(s, target_prop_whitelist[i])) {
-                    ok = true;
-                    break;
-                }
-            }
-            if (!ok) {
-                continue;
-            }
-        }
-        nodes.push_back(anim);
-    }
-
-    return nodes; // pray for NRVO
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationStack::AnimationStack(uint64_t id, const Element &element, const std::string &name, const Document &doc) :
-        Object(id, element, name) {
-    const Scope &sc = GetRequiredScope(element);
-
-    // note: we don't currently use any of these properties so we shouldn't bother if it is missing
-    props = GetPropertyTable(doc, "AnimationStack.FbxAnimStack", element, sc, true);
-
-    // resolve attached animation layers
-    const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(ID(), "AnimationLayer");
-    layers.reserve(conns.size());
-
-    for (const Connection *con : conns) {
-
-        // link should not go to a property
-        if (con->PropertyName().length()) {
-            continue;
-        }
-
-        const Object *const ob = con->SourceObject();
-        if (!ob) {
-            DOMWarning("failed to read source object for AnimationLayer->AnimationStack link, ignoring", &element);
-            continue;
-        }
-
-        const AnimationLayer *const anim = dynamic_cast<const AnimationLayer *>(ob);
-        if (!anim) {
-            DOMWarning("source object for ->AnimationStack link is not an AnimationLayer", &element);
-            continue;
-        }
-        layers.push_back(anim);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-AnimationStack::~AnimationStack() {
-    // empty
-}
-
-} // namespace FBX
-} // namespace Assimp
-
-#endif // ASSIMP_BUILD_NO_FBX_IMPORTER
diff --git a/libs/assimp/code/AssetLib/FBX/FBXBinaryTokenizer.cpp b/libs/assimp/code/AssetLib/FBX/FBXBinaryTokenizer.cpp
deleted file mode 100644
index 1a4d118..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXBinaryTokenizer.cpp
+++ /dev/null
@@ -1,485 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-/** @file  FBXBinaryTokenizer.cpp
- *  @brief Implementation of a fake lexer for binary fbx files -
- *    we emit tokens so the parser needs almost no special handling
- *    for binary files.
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXTokenizer.h"
-#include "FBXUtil.h"
-#include <assimp/defs.h>
-#include <stdint.h>
-#include <assimp/Exceptional.h>
-#include <assimp/ByteSwapper.h>
-#include <assimp/DefaultLogger.hpp>
-#include <assimp/StringUtils.h>
-
-namespace Assimp {
-namespace FBX {
-
-//enum Flag
-//{
-//   e_unknown_0 = 1 << 0,
-//   e_unknown_1 = 1 << 1,
-//   e_unknown_2 = 1 << 2,
-//   e_unknown_3 = 1 << 3,
-//   e_unknown_4 = 1 << 4,
-//   e_unknown_5 = 1 << 5,
-//   e_unknown_6 = 1 << 6,
-//   e_unknown_7 = 1 << 7,
-//   e_unknown_8 = 1 << 8,
-//   e_unknown_9 = 1 << 9,
-//   e_unknown_10 = 1 << 10,
-//   e_unknown_11 = 1 << 11,
-//   e_unknown_12 = 1 << 12,
-//   e_unknown_13 = 1 << 13,
-//   e_unknown_14 = 1 << 14,
-//   e_unknown_15 = 1 << 15,
-//   e_unknown_16 = 1 << 16,
-//   e_unknown_17 = 1 << 17,
-//   e_unknown_18 = 1 << 18,
-//   e_unknown_19 = 1 << 19,
-//   e_unknown_20 = 1 << 20,
-//   e_unknown_21 = 1 << 21,
-//   e_unknown_22 = 1 << 22,
-//   e_unknown_23 = 1 << 23,
-//   e_flag_field_size_64_bit = 1 << 24, // Not sure what is
-//   e_unknown_25 = 1 << 25,
-//   e_unknown_26 = 1 << 26,
-//   e_unknown_27 = 1 << 27,
-//   e_unknown_28 = 1 << 28,
-//   e_unknown_29 = 1 << 29,
-//   e_unknown_30 = 1 << 30,
-//   e_unknown_31 = 1 << 31
-//};
-//
-//bool check_flag(uint32_t flags, Flag to_check)
-//{
-//	return (flags & to_check) != 0;
-//}
-// ------------------------------------------------------------------------------------------------
-Token::Token(const char* sbegin, const char* send, TokenType type, size_t offset)
-    :
-    #ifdef DEBUG
-    contents(sbegin, static_cast<size_t>(send-sbegin)),
-    #endif
-    sbegin(sbegin)
-    , send(send)
-    , type(type)
-    , line(offset)
-    , column(BINARY_MARKER)
-{
-    ai_assert(sbegin);
-    ai_assert(send);
-
-    // binary tokens may have zero length because they are sometimes dummies
-    // inserted by TokenizeBinary()
-    ai_assert(send >= sbegin);
-}
-
-
-namespace {
-
-// ------------------------------------------------------------------------------------------------
-// signal tokenization error, this is always unrecoverable. Throws DeadlyImportError.
-AI_WONT_RETURN void TokenizeError(const std::string& message, size_t offset) AI_WONT_RETURN_SUFFIX;
-AI_WONT_RETURN void TokenizeError(const std::string& message, size_t offset)
-{
-    throw DeadlyImportError("FBX-Tokenize", Util::GetOffsetText(offset), message);
-}
-
-
-// ------------------------------------------------------------------------------------------------
-size_t Offset(const char* begin, const char* cursor) {
-    ai_assert(begin <= cursor);
-
-    return cursor - begin;
-}
-
-// ------------------------------------------------------------------------------------------------
-void TokenizeError(const std::string& message, const char* begin, const char* cursor) {
-    TokenizeError(message, Offset(begin, cursor));
-}
-
-// ------------------------------------------------------------------------------------------------
-uint32_t ReadWord(const char* input, const char*& cursor, const char* end) {
-    const size_t k_to_read = sizeof( uint32_t );
-    if(Offset(cursor, end) < k_to_read ) {
-        TokenizeError("cannot ReadWord, out of bounds",input, cursor);
-    }
-
-    uint32_t word;
-    ::memcpy(&word, cursor, 4);
-    AI_SWAP4(word);
-
-    cursor += k_to_read;
-
-    return word;
-}
-
-// ------------------------------------------------------------------------------------------------
-uint64_t ReadDoubleWord(const char* input, const char*& cursor, const char* end) {
-    const size_t k_to_read = sizeof(uint64_t);
-    if(Offset(cursor, end) < k_to_read) {
-        TokenizeError("cannot ReadDoubleWord, out of bounds",input, cursor);
-    }
-
-    uint64_t dword /*= *reinterpret_cast<const uint64_t*>(cursor)*/;
-    ::memcpy( &dword, cursor, sizeof( uint64_t ) );
-    AI_SWAP8(dword);
-
-    cursor += k_to_read;
-
-    return dword;
-}
-
-// ------------------------------------------------------------------------------------------------
-uint8_t ReadByte(const char* input, const char*& cursor, const char* end) {
-    if(Offset(cursor, end) < sizeof( uint8_t ) ) {
-        TokenizeError("cannot ReadByte, out of bounds",input, cursor);
-    }
-
-    uint8_t word;/* = *reinterpret_cast< const uint8_t* >( cursor )*/
-    ::memcpy( &word, cursor, sizeof( uint8_t ) );
-    ++cursor;
-
-    return word;
-}
-
-// ------------------------------------------------------------------------------------------------
-unsigned int ReadString(const char*& sbegin_out, const char*& send_out, const char* input,
-        const char*& cursor, const char* end, bool long_length = false, bool allow_null = false) {
-    const uint32_t len_len = long_length ? 4 : 1;
-    if(Offset(cursor, end) < len_len) {
-        TokenizeError("cannot ReadString, out of bounds reading length",input, cursor);
-    }
-
-    const uint32_t length = long_length ? ReadWord(input, cursor, end) : ReadByte(input, cursor, end);
-
-    if (Offset(cursor, end) < length) {
-        TokenizeError("cannot ReadString, length is out of bounds",input, cursor);
-    }
-
-    sbegin_out = cursor;
-    cursor += length;
-
-    send_out = cursor;
-
-    if(!allow_null) {
-        for (unsigned int i = 0; i < length; ++i) {
-            if(sbegin_out[i] == '\0') {
-                TokenizeError("failed ReadString, unexpected NUL character in string",input, cursor);
-            }
-        }
-    }
-
-    return length;
-}
-
-// ------------------------------------------------------------------------------------------------
-void ReadData(const char*& sbegin_out, const char*& send_out, const char* input, const char*& cursor, const char* end) {
-    if(Offset(cursor, end) < 1) {
-        TokenizeError("cannot ReadData, out of bounds reading length",input, cursor);
-    }
-
-    const char type = *cursor;
-    sbegin_out = cursor++;
-
-    switch(type)
-    {
-        // 16 bit int
-    case 'Y':
-        cursor += 2;
-        break;
-
-        // 1 bit bool flag (yes/no)
-    case 'C':
-        cursor += 1;
-        break;
-
-        // 32 bit int
-    case 'I':
-        // <- fall through
-
-        // float
-    case 'F':
-        cursor += 4;
-        break;
-
-        // double
-    case 'D':
-        cursor += 8;
-        break;
-
-        // 64 bit int
-    case 'L':
-        cursor += 8;
-        break;
-
-        // note: do not write cursor += ReadWord(...cursor) as this would be UB
-
-        // raw binary data
-    case 'R':
-    {
-        const uint32_t length = ReadWord(input, cursor, end);
-        cursor += length;
-        break;
-    }
-
-    case 'b':
-        // TODO: what is the 'b' type code? Right now we just skip over it /
-        // take the full range we could get
-        cursor = end;
-        break;
-
-        // array of *
-    case 'f':
-    case 'd':
-    case 'l':
-    case 'i':
-    case 'c':   {
-        const uint32_t length = ReadWord(input, cursor, end);
-        const uint32_t encoding = ReadWord(input, cursor, end);
-
-        const uint32_t comp_len = ReadWord(input, cursor, end);
-
-        // compute length based on type and check against the stored value
-        if(encoding == 0) {
-            uint32_t stride = 0;
-            switch(type)
-            {
-            case 'f':
-            case 'i':
-                stride = 4;
-                break;
-
-            case 'd':
-            case 'l':
-                stride = 8;
-                break;
-
-            case 'c':
-                stride = 1;
-                break;
-
-            default:
-                ai_assert(false);
-            };
-            ai_assert(stride > 0);
-            if(length * stride != comp_len) {
-                TokenizeError("cannot ReadData, calculated data stride differs from what the file claims",input, cursor);
-            }
-        }
-        // zip/deflate algorithm (encoding==1)? take given length. anything else? die
-        else if (encoding != 1) {
-            TokenizeError("cannot ReadData, unknown encoding",input, cursor);
-        }
-        cursor += comp_len;
-        break;
-    }
-
-        // string
-    case 'S': {
-        const char* sb, *se;
-        // 0 characters can legally happen in such strings
-        ReadString(sb, se, input, cursor, end, true, true);
-        break;
-    }
-    default:
-        TokenizeError("cannot ReadData, unexpected type code: " + std::string(&type, 1),input, cursor);
-    }
-
-    if(cursor > end) {
-        TokenizeError("cannot ReadData, the remaining size is too small for the data type: " + std::string(&type, 1),input, cursor);
-    }
-
-    // the type code is contained in the returned range
-    send_out = cursor;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-bool ReadScope(TokenList& output_tokens, const char* input, const char*& cursor, const char* end, bool const is64bits)
-{
-    // the first word contains the offset at which this block ends
-	const uint64_t end_offset = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
-
-    // we may get 0 if reading reached the end of the file -
-    // fbx files have a mysterious extra footer which I don't know
-    // how to extract any information from, but at least it always
-    // starts with a 0.
-    if(!end_offset) {
-        return false;
-    }
-
-    if(end_offset > Offset(input, end)) {
-        TokenizeError("block offset is out of range",input, cursor);
-    }
-    else if(end_offset < Offset(input, cursor)) {
-        TokenizeError("block offset is negative out of range",input, cursor);
-    }
-
-    // the second data word contains the number of properties in the scope
-	const uint64_t prop_count = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
-
-    // the third data word contains the length of the property list
-	const uint64_t prop_length = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
-
-    // now comes the name of the scope/key
-    const char* sbeg, *send;
-    ReadString(sbeg, send, input, cursor, end);
-
-    output_tokens.push_back(new_Token(sbeg, send, TokenType_KEY, Offset(input, cursor) ));
-
-    // now come the individual properties
-    const char* begin_cursor = cursor;
-
-    if ((begin_cursor + prop_length) > end) {
-        TokenizeError("property length out of bounds reading length ", input, cursor);
-    }
-
-    for (unsigned int i = 0; i < prop_count; ++i) {
-        ReadData(sbeg, send, input, cursor, begin_cursor + prop_length);
-
-        output_tokens.push_back(new_Token(sbeg, send, TokenType_DATA, Offset(input, cursor) ));
-
-        if(i != prop_count-1) {
-            output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_COMMA, Offset(input, cursor) ));
-        }
-    }
-
-    if (Offset(begin_cursor, cursor) != prop_length) {
-        TokenizeError("property length not reached, something is wrong",input, cursor);
-    }
-
-    // at the end of each nested block, there is a NUL record to indicate
-    // that the sub-scope exists (i.e. to distinguish between P: and P : {})
-    // this NUL record is 13 bytes long on 32 bit version and 25 bytes long on 64 bit.
-	const size_t sentinel_block_length = is64bits ? (sizeof(uint64_t)* 3 + 1) : (sizeof(uint32_t)* 3 + 1);
-
-    if (Offset(input, cursor) < end_offset) {
-        if (end_offset - Offset(input, cursor) < sentinel_block_length) {
-            TokenizeError("insufficient padding bytes at block end",input, cursor);
-        }
-
-        output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_OPEN_BRACKET, Offset(input, cursor) ));
-
-        // XXX this is vulnerable to stack overflowing ..
-        while(Offset(input, cursor) < end_offset - sentinel_block_length) {
-			ReadScope(output_tokens, input, cursor, input + end_offset - sentinel_block_length, is64bits);
-        }
-        output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_CLOSE_BRACKET, Offset(input, cursor) ));
-
-        for (unsigned int i = 0; i < sentinel_block_length; ++i) {
-            if(cursor[i] != '\0') {
-                TokenizeError("failed to read nested block sentinel, expected all bytes to be 0",input, cursor);
-            }
-        }
-        cursor += sentinel_block_length;
-    }
-
-    if (Offset(input, cursor) != end_offset) {
-        TokenizeError("scope length not reached, something is wrong",input, cursor);
-    }
-
-    return true;
-}
-
-} // anonymous namespace
-
-// ------------------------------------------------------------------------------------------------
-// TODO: Test FBX Binary files newer than the 7500 version to check if the 64 bits address behaviour is consistent
-void TokenizeBinary(TokenList& output_tokens, const char* input, size_t length)
-{
-	ai_assert(input);
-	ASSIMP_LOG_DEBUG("Tokenizing binary FBX file");
-
-    if(length < 0x1b) {
-        TokenizeError("file is too short",0);
-    }
-
-    //uint32_t offset = 0x15;
-/*    const char* cursor = input + 0x15;
-
-    const uint32_t flags = ReadWord(input, cursor, input + length);
-
-    const uint8_t padding_0 = ReadByte(input, cursor, input + length); // unused
-    const uint8_t padding_1 = ReadByte(input, cursor, input + length); // unused*/
-
-    if (strncmp(input,"Kaydara FBX Binary",18)) {
-        TokenizeError("magic bytes not found",0);
-    }
-
-    const char* cursor = input + 18;
-	/*Result ignored*/ ReadByte(input, cursor, input + length);
-	/*Result ignored*/ ReadByte(input, cursor, input + length);
-	/*Result ignored*/ ReadByte(input, cursor, input + length);
-	/*Result ignored*/ ReadByte(input, cursor, input + length);
-	/*Result ignored*/ ReadByte(input, cursor, input + length);
-	const uint32_t version = ReadWord(input, cursor, input + length);
-	ASSIMP_LOG_DEBUG("FBX version: ", version);
-	const bool is64bits = version >= 7500;
-    const char *end = input + length;
-    try
-    {
-        while (cursor < end ) {
-		    if (!ReadScope(output_tokens, input, cursor, input + length, is64bits)) {
-                break;
-            }
-        }
-    }
-    catch (const DeadlyImportError& e)
-    {
-        if (!is64bits && (length > std::numeric_limits<std::uint32_t>::max())) {
-            throw DeadlyImportError("The FBX file is invalid. This may be because the content is too big for this older version (", ai_to_string(version), ") of the FBX format. (", e.what(), ")");
-        }
-        throw;
-    }
-}
-
-} // !FBX
-} // !Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXCommon.h b/libs/assimp/code/AssetLib/FBX/FBXCommon.h
deleted file mode 100644
index ec7459c..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXCommon.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file FBXCommon.h
-* Some useful constants and enums for dealing with FBX files.
-*/
-#ifndef AI_FBXCOMMON_H_INC
-#define AI_FBXCOMMON_H_INC
-
-#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
-
-namespace Assimp {
-namespace FBX {
-
-const std::string NULL_RECORD = { // 25 null bytes in 64-bit and 13 null bytes in 32-bit
-    '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
-    '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0'
-}; // who knows why, it looks like two integers 32/64 bit (compressed and uncompressed sizes?) + 1 byte (might be compression type?)
-const std::string SEPARATOR = { '\x00', '\x01' }; // for use inside strings
-const std::string MAGIC_NODE_TAG = "_$AssimpFbx$"; // from import
-const int64_t SECOND = 46186158000; // FBX's kTime unit
-
-// rotation order. We'll probably use EulerXYZ for everything
-enum RotOrder {
-    RotOrder_EulerXYZ = 0,
-    RotOrder_EulerXZY,
-    RotOrder_EulerYZX,
-    RotOrder_EulerYXZ,
-    RotOrder_EulerZXY,
-    RotOrder_EulerZYX,
-
-    RotOrder_SphericXYZ,
-
-    RotOrder_MAX // end-of-enum sentinel
-};
-
-// transformation inheritance method. Most of the time RSrs
-enum TransformInheritance {
-    TransformInheritance_RrSs = 0,
-    TransformInheritance_RSrs,
-    TransformInheritance_Rrs,
-
-    TransformInheritance_MAX // end-of-enum sentinel
-};
-
-} // namespace FBX
-} // namespace Assimp
-
-#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#endif // AI_FBXCOMMON_H_INC
diff --git a/libs/assimp/code/AssetLib/FBX/FBXCompileConfig.h b/libs/assimp/code/AssetLib/FBX/FBXCompileConfig.h
deleted file mode 100644
index 75787d3..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXCompileConfig.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXCompileConfig.h
- *  @brief FBX importer compile-time switches
- */
-#ifndef INCLUDED_AI_FBX_COMPILECONFIG_H
-#define INCLUDED_AI_FBX_COMPILECONFIG_H
-
-#include <map>
-#include <set>
-
-//
-#if _MSC_VER > 1500 || (defined __GNUC___)
-#   define ASSIMP_FBX_USE_UNORDERED_MULTIMAP
-#   else
-#   define fbx_unordered_map map
-#   define fbx_unordered_multimap multimap
-#   define fbx_unordered_set set
-#   define fbx_unordered_multiset multiset
-#endif
-
-#ifdef ASSIMP_FBX_USE_UNORDERED_MULTIMAP
-#   include <unordered_map>
-#   include <unordered_set>
-#   if defined(_MSC_VER) && _MSC_VER <= 1600
-#       define fbx_unordered_map tr1::unordered_map
-#       define fbx_unordered_multimap tr1::unordered_multimap
-#       define fbx_unordered_set tr1::unordered_set
-#       define fbx_unordered_multiset tr1::unordered_multiset
-#   else
-#       define fbx_unordered_map unordered_map
-#       define fbx_unordered_multimap unordered_multimap
-#       define fbx_unordered_set unordered_set
-#       define fbx_unordered_multiset unordered_multiset
-#   endif
-#endif
-
-#endif // INCLUDED_AI_FBX_COMPILECONFIG_H
diff --git a/libs/assimp/code/AssetLib/FBX/FBXConverter.cpp b/libs/assimp/code/AssetLib/FBX/FBXConverter.cpp
deleted file mode 100644
index 3287210..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXConverter.cpp
+++ /dev/null
@@ -1,3679 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXConverter.cpp
- *  @brief Implementation of the FBX DOM -> aiScene converter
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXConverter.h"
-#include "FBXDocument.h"
-#include "FBXImporter.h"
-#include "FBXMeshGeometry.h"
-#include "FBXParser.h"
-#include "FBXProperties.h"
-#include "FBXUtil.h"
-
-#include <assimp/MathFunctions.h>
-#include <assimp/StringComparison.h>
-
-#include <assimp/scene.h>
-
-#include <assimp/CreateAnimMesh.h>
-#include <assimp/StringUtils.h>
-#include <assimp/commonMetaData.h>
-
-#include <stdlib.h>
-#include <cstdint>
-#include <iomanip>
-#include <iostream>
-#include <iterator>
-#include <memory>
-#include <sstream>
-#include <tuple>
-#include <vector>
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-#define MAGIC_NODE_TAG "_$AssimpFbx$"
-
-#define CONVERT_FBX_TIME(time) static_cast<double>(time) / 46186158000LL
-
-FBXConverter::FBXConverter(aiScene *out, const Document &doc, bool removeEmptyBones) :
-        defaultMaterialIndex(),
-        mMeshes(),
-        lights(),
-        cameras(),
-        textures(),
-        materials_converted(),
-        textures_converted(),
-        meshes_converted(),
-        node_anim_chain_bits(),
-        mNodeNames(),
-        anim_fps(),
-        mSceneOut(out),
-        doc(doc),
-        mRemoveEmptyBones(removeEmptyBones) {
-    // animations need to be converted first since this will
-    // populate the node_anim_chain_bits map, which is needed
-    // to determine which nodes need to be generated.
-    ConvertAnimations();
-    // Embedded textures in FBX could be connected to nothing but to itself,
-    // for instance Texture -> Video connection only but not to the main graph,
-    // The idea here is to traverse all objects to find these Textures and convert them,
-    // so later during material conversion it will find converted texture in the textures_converted array.
-    if (doc.Settings().readTextures) {
-        ConvertOrphanedEmbeddedTextures();
-    }
-    ConvertRootNode();
-
-    if (doc.Settings().readAllMaterials) {
-        // unfortunately this means we have to evaluate all objects
-        for (const ObjectMap::value_type &v : doc.Objects()) {
-
-            const Object *ob = v.second->Get();
-            if (!ob) {
-                continue;
-            }
-
-            const Material *mat = dynamic_cast<const Material *>(ob);
-            if (mat) {
-
-                if (materials_converted.find(mat) == materials_converted.end()) {
-                    ConvertMaterial(*mat, 0);
-                }
-            }
-        }
-    }
-
-    ConvertGlobalSettings();
-    TransferDataToScene();
-
-    // if we didn't read any meshes set the AI_SCENE_FLAGS_INCOMPLETE
-    // to make sure the scene passes assimp's validation. FBX files
-    // need not contain geometry (i.e. camera animations, raw armatures).
-    if (out->mNumMeshes == 0) {
-        out->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
-    }
-}
-
-FBXConverter::~FBXConverter() {
-    std::for_each(mMeshes.begin(), mMeshes.end(), Util::delete_fun<aiMesh>());
-    std::for_each(materials.begin(), materials.end(), Util::delete_fun<aiMaterial>());
-    std::for_each(animations.begin(), animations.end(), Util::delete_fun<aiAnimation>());
-    std::for_each(lights.begin(), lights.end(), Util::delete_fun<aiLight>());
-    std::for_each(cameras.begin(), cameras.end(), Util::delete_fun<aiCamera>());
-    std::for_each(textures.begin(), textures.end(), Util::delete_fun<aiTexture>());
-}
-
-void FBXConverter::ConvertRootNode() {
-    mSceneOut->mRootNode = new aiNode();
-    std::string unique_name;
-    GetUniqueName("RootNode", unique_name);
-    mSceneOut->mRootNode->mName.Set(unique_name);
-
-    // root has ID 0
-    ConvertNodes(0L, mSceneOut->mRootNode, mSceneOut->mRootNode);
-}
-
-static std::string getAncestorBaseName(const aiNode *node) {
-    const char *nodeName = nullptr;
-    size_t length = 0;
-    while (node && (!nodeName || length == 0)) {
-        nodeName = node->mName.C_Str();
-        length = node->mName.length;
-        node = node->mParent;
-    }
-
-    if (!nodeName || length == 0) {
-        return {};
-    }
-    // could be std::string_view if c++17 available
-    return std::string(nodeName, length);
-}
-
-// Make unique name
-std::string FBXConverter::MakeUniqueNodeName(const Model *const model, const aiNode &parent) {
-    std::string original_name = FixNodeName(model->Name());
-    if (original_name.empty()) {
-        original_name = getAncestorBaseName(&parent);
-    }
-    std::string unique_name;
-    GetUniqueName(original_name, unique_name);
-    return unique_name;
-}
-
-/// This struct manages nodes which may or may not end up in the node hierarchy.
-/// When a node becomes a child of another node, that node becomes its owner and mOwnership should be released.
-struct FBXConverter::PotentialNode
-{
-    PotentialNode() : mOwnership(new aiNode), mNode(mOwnership.get()) {}
-    PotentialNode(const std::string& name) : mOwnership(new aiNode(name)), mNode(mOwnership.get()) {}
-    aiNode* operator->() { return mNode; }
-    std::unique_ptr<aiNode> mOwnership;
-    aiNode* mNode;
-};
-
-/// todo: pre-build node hierarchy
-/// todo: get bone from stack
-/// todo: make map of aiBone* to aiNode*
-/// then update convert clusters to the new format
-void FBXConverter::ConvertNodes(uint64_t id, aiNode *parent, aiNode *root_node) {
-    const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(id, "Model");
-
-    std::vector<PotentialNode> nodes;
-    nodes.reserve(conns.size());
-
-    std::vector<PotentialNode> nodes_chain;
-    std::vector<PotentialNode> post_nodes_chain;
-
-    for (const Connection *con : conns) {
-        // ignore object-property links
-        if (con->PropertyName().length()) {
-            // really important we document why this is ignored.
-            FBXImporter::LogInfo("ignoring property link - no docs on why this is ignored");
-            continue; //?
-        }
-
-        // convert connection source object into Object base class
-        const Object *const object = con->SourceObject();
-        if (nullptr == object) {
-            FBXImporter::LogError("failed to convert source object for Model link");
-            continue;
-        }
-
-        // FBX Model::Cube, Model::Bone001, etc elements
-        // This detects if we can cast the object into this model structure.
-        const Model *const model = dynamic_cast<const Model *>(object);
-
-        if (nullptr != model) {
-            nodes_chain.clear();
-            post_nodes_chain.clear();
-
-            aiMatrix4x4 new_abs_transform = parent->mTransformation;
-            std::string node_name = FixNodeName(model->Name());
-            // even though there is only a single input node, the design of
-            // assimp (or rather: the complicated transformation chain that
-            // is employed by fbx) means that we may need multiple aiNode's
-            // to represent a fbx node's transformation.
-
-            // generate node transforms - this includes pivot data
-            // if need_additional_node is true then you t
-            const bool need_additional_node = GenerateTransformationNodeChain(*model, node_name, nodes_chain, post_nodes_chain);
-
-            // assert that for the current node we must have at least a single transform
-            ai_assert(nodes_chain.size());
-
-            if (need_additional_node) {
-                nodes_chain.emplace_back(PotentialNode(node_name));
-            }
-
-            //setup metadata on newest node
-            SetupNodeMetadata(*model, *nodes_chain.back().mNode);
-
-            // link all nodes in a row
-            aiNode *last_parent = parent;
-            for (PotentialNode& child : nodes_chain) {
-                ai_assert(child.mNode);
-
-                if (last_parent != parent) {
-                    last_parent->mNumChildren = 1;
-                    last_parent->mChildren = new aiNode *[1];
-                    last_parent->mChildren[0] = child.mOwnership.release();
-                }
-
-                child->mParent = last_parent;
-                last_parent = child.mNode;
-
-                new_abs_transform *= child->mTransformation;
-            }
-
-            // attach geometry
-            ConvertModel(*model, nodes_chain.back().mNode, root_node, new_abs_transform);
-
-            // check if there will be any child nodes
-            const std::vector<const Connection *> &child_conns = doc.GetConnectionsByDestinationSequenced(model->ID(), "Model");
-
-            // if so, link the geometric transform inverse nodes
-            // before we attach any child nodes
-            if (child_conns.size()) {
-                for (PotentialNode& postnode : post_nodes_chain) {
-                    ai_assert(postnode.mNode);
-
-                    if (last_parent != parent) {
-                        last_parent->mNumChildren = 1;
-                        last_parent->mChildren = new aiNode *[1];
-                        last_parent->mChildren[0] = postnode.mOwnership.release();
-                    }
-
-                    postnode->mParent = last_parent;
-                    last_parent = postnode.mNode;
-
-                    new_abs_transform *= postnode->mTransformation;
-                }
-            } else {
-                // free the nodes we allocated as we don't need them
-                post_nodes_chain.clear();
-            }
-
-            // recursion call - child nodes
-            ConvertNodes(model->ID(), last_parent, root_node);
-
-            if (doc.Settings().readLights) {
-                ConvertLights(*model, node_name);
-            }
-
-            if (doc.Settings().readCameras) {
-                ConvertCameras(*model, node_name);
-            }
-
-            nodes.push_back(std::move(nodes_chain.front()));
-            nodes_chain.clear();
-        }
-    }
-
-    if (nodes.size()) {
-        parent->mChildren = new aiNode *[nodes.size()]();
-        parent->mNumChildren = static_cast<unsigned int>(nodes.size());
-
-        for (unsigned int i = 0; i < nodes.size(); ++i)
-        {
-            parent->mChildren[i] = nodes[i].mOwnership.release();
-        }
-        nodes.clear();
-    } else {
-        parent->mNumChildren = 0;
-        parent->mChildren = nullptr;
-    }
-}
-
-void FBXConverter::ConvertLights(const Model &model, const std::string &orig_name) {
-    const std::vector<const NodeAttribute *> &node_attrs = model.GetAttributes();
-    for (const NodeAttribute *attr : node_attrs) {
-        const Light *const light = dynamic_cast<const Light *>(attr);
-        if (light) {
-            ConvertLight(*light, orig_name);
-        }
-    }
-}
-
-void FBXConverter::ConvertCameras(const Model &model, const std::string &orig_name) {
-    const std::vector<const NodeAttribute *> &node_attrs = model.GetAttributes();
-    for (const NodeAttribute *attr : node_attrs) {
-        const Camera *const cam = dynamic_cast<const Camera *>(attr);
-        if (cam) {
-            ConvertCamera(*cam, orig_name);
-        }
-    }
-}
-
-void FBXConverter::ConvertLight(const Light &light, const std::string &orig_name) {
-    lights.push_back(new aiLight());
-    aiLight *const out_light = lights.back();
-
-    out_light->mName.Set(orig_name);
-
-    const float intensity = light.Intensity() / 100.0f;
-    const aiVector3D &col = light.Color();
-
-    out_light->mColorDiffuse = aiColor3D(col.x, col.y, col.z);
-    out_light->mColorDiffuse.r *= intensity;
-    out_light->mColorDiffuse.g *= intensity;
-    out_light->mColorDiffuse.b *= intensity;
-
-    out_light->mColorSpecular = out_light->mColorDiffuse;
-
-    //lights are defined along negative y direction
-    out_light->mPosition = aiVector3D(0.0f);
-    out_light->mDirection = aiVector3D(0.0f, -1.0f, 0.0f);
-    out_light->mUp = aiVector3D(0.0f, 0.0f, -1.0f);
-
-    switch (light.LightType()) {
-        case Light::Type_Point:
-            out_light->mType = aiLightSource_POINT;
-            break;
-
-        case Light::Type_Directional:
-            out_light->mType = aiLightSource_DIRECTIONAL;
-            break;
-
-        case Light::Type_Spot:
-            out_light->mType = aiLightSource_SPOT;
-            out_light->mAngleOuterCone = AI_DEG_TO_RAD(light.OuterAngle());
-            out_light->mAngleInnerCone = AI_DEG_TO_RAD(light.InnerAngle());
-            break;
-
-        case Light::Type_Area:
-            FBXImporter::LogWarn("cannot represent area light, set to UNDEFINED");
-            out_light->mType = aiLightSource_UNDEFINED;
-            break;
-
-        case Light::Type_Volume:
-            FBXImporter::LogWarn("cannot represent volume light, set to UNDEFINED");
-            out_light->mType = aiLightSource_UNDEFINED;
-            break;
-        default:
-            ai_assert(false);
-    }
-
-    float decay = light.DecayStart();
-    switch (light.DecayType()) {
-        case Light::Decay_None:
-            out_light->mAttenuationConstant = decay;
-            out_light->mAttenuationLinear = 0.0f;
-            out_light->mAttenuationQuadratic = 0.0f;
-            break;
-        case Light::Decay_Linear:
-            out_light->mAttenuationConstant = 0.0f;
-            out_light->mAttenuationLinear = 2.0f / decay;
-            out_light->mAttenuationQuadratic = 0.0f;
-            break;
-        case Light::Decay_Quadratic:
-            out_light->mAttenuationConstant = 0.0f;
-            out_light->mAttenuationLinear = 0.0f;
-            out_light->mAttenuationQuadratic = 2.0f / (decay * decay);
-            break;
-        case Light::Decay_Cubic:
-            FBXImporter::LogWarn("cannot represent cubic attenuation, set to Quadratic");
-            out_light->mAttenuationQuadratic = 1.0f;
-            break;
-        default:
-            ai_assert(false);
-            break;
-    }
-}
-
-void FBXConverter::ConvertCamera(const Camera &cam, const std::string &orig_name) {
-    cameras.push_back(new aiCamera());
-    aiCamera *const out_camera = cameras.back();
-
-    out_camera->mName.Set(orig_name);
-
-    out_camera->mAspect = cam.AspectWidth() / cam.AspectHeight();
-
-    out_camera->mPosition = aiVector3D(0.0f);
-    out_camera->mLookAt = aiVector3D(1.0f, 0.0f, 0.0f);
-    out_camera->mUp = aiVector3D(0.0f, 1.0f, 0.0f);
-
-    out_camera->mHorizontalFOV = AI_DEG_TO_RAD(cam.FieldOfView());
-
-    out_camera->mClipPlaneNear = cam.NearPlane();
-    out_camera->mClipPlaneFar = cam.FarPlane();
-
-    out_camera->mHorizontalFOV = AI_DEG_TO_RAD(cam.FieldOfView());
-    out_camera->mClipPlaneNear = cam.NearPlane();
-    out_camera->mClipPlaneFar = cam.FarPlane();
-}
-
-void FBXConverter::GetUniqueName(const std::string &name, std::string &uniqueName) {
-    uniqueName = name;
-    auto it_pair = mNodeNames.insert({ name, 0 }); // duplicate node name instance count
-    unsigned int &i = it_pair.first->second;
-    while (!it_pair.second) {
-        i++;
-        std::ostringstream ext;
-        ext << name << std::setfill('0') << std::setw(3) << i;
-        uniqueName = ext.str();
-        it_pair = mNodeNames.insert({ uniqueName, 0 });
-    }
-}
-
-const char *FBXConverter::NameTransformationComp(TransformationComp comp) {
-    switch (comp) {
-        case TransformationComp_Translation:
-            return "Translation";
-        case TransformationComp_RotationOffset:
-            return "RotationOffset";
-        case TransformationComp_RotationPivot:
-            return "RotationPivot";
-        case TransformationComp_PreRotation:
-            return "PreRotation";
-        case TransformationComp_Rotation:
-            return "Rotation";
-        case TransformationComp_PostRotation:
-            return "PostRotation";
-        case TransformationComp_RotationPivotInverse:
-            return "RotationPivotInverse";
-        case TransformationComp_ScalingOffset:
-            return "ScalingOffset";
-        case TransformationComp_ScalingPivot:
-            return "ScalingPivot";
-        case TransformationComp_Scaling:
-            return "Scaling";
-        case TransformationComp_ScalingPivotInverse:
-            return "ScalingPivotInverse";
-        case TransformationComp_GeometricScaling:
-            return "GeometricScaling";
-        case TransformationComp_GeometricRotation:
-            return "GeometricRotation";
-        case TransformationComp_GeometricTranslation:
-            return "GeometricTranslation";
-        case TransformationComp_GeometricScalingInverse:
-            return "GeometricScalingInverse";
-        case TransformationComp_GeometricRotationInverse:
-            return "GeometricRotationInverse";
-        case TransformationComp_GeometricTranslationInverse:
-            return "GeometricTranslationInverse";
-        case TransformationComp_MAXIMUM: // this is to silence compiler warnings
-        default:
-            break;
-    }
-
-    ai_assert(false);
-
-    return nullptr;
-}
-
-const char *FBXConverter::NameTransformationCompProperty(TransformationComp comp) {
-    switch (comp) {
-        case TransformationComp_Translation:
-            return "Lcl Translation";
-        case TransformationComp_RotationOffset:
-            return "RotationOffset";
-        case TransformationComp_RotationPivot:
-            return "RotationPivot";
-        case TransformationComp_PreRotation:
-            return "PreRotation";
-        case TransformationComp_Rotation:
-            return "Lcl Rotation";
-        case TransformationComp_PostRotation:
-            return "PostRotation";
-        case TransformationComp_RotationPivotInverse:
-            return "RotationPivotInverse";
-        case TransformationComp_ScalingOffset:
-            return "ScalingOffset";
-        case TransformationComp_ScalingPivot:
-            return "ScalingPivot";
-        case TransformationComp_Scaling:
-            return "Lcl Scaling";
-        case TransformationComp_ScalingPivotInverse:
-            return "ScalingPivotInverse";
-        case TransformationComp_GeometricScaling:
-            return "GeometricScaling";
-        case TransformationComp_GeometricRotation:
-            return "GeometricRotation";
-        case TransformationComp_GeometricTranslation:
-            return "GeometricTranslation";
-        case TransformationComp_GeometricScalingInverse:
-            return "GeometricScalingInverse";
-        case TransformationComp_GeometricRotationInverse:
-            return "GeometricRotationInverse";
-        case TransformationComp_GeometricTranslationInverse:
-            return "GeometricTranslationInverse";
-        case TransformationComp_MAXIMUM: // this is to silence compiler warnings
-            break;
-    }
-
-    ai_assert(false);
-
-    return nullptr;
-}
-
-aiVector3D FBXConverter::TransformationCompDefaultValue(TransformationComp comp) {
-    // XXX a neat way to solve the never-ending special cases for scaling
-    // would be to do everything in log space!
-    return comp == TransformationComp_Scaling ? aiVector3D(1.f, 1.f, 1.f) : aiVector3D();
-}
-
-void FBXConverter::GetRotationMatrix(Model::RotOrder mode, const aiVector3D &rotation, aiMatrix4x4 &out) {
-    if (mode == Model::RotOrder_SphericXYZ) {
-        FBXImporter::LogError("Unsupported RotationMode: SphericXYZ");
-        out = aiMatrix4x4();
-        return;
-    }
-
-    const float angle_epsilon = Math::getEpsilon<float>();
-
-    out = aiMatrix4x4();
-
-    bool is_id[3] = { true, true, true };
-
-    aiMatrix4x4 temp[3];
-    if (std::fabs(rotation.z) > angle_epsilon) {
-        aiMatrix4x4::RotationZ(AI_DEG_TO_RAD(rotation.z), temp[2]);
-        is_id[2] = false;
-    }
-    if (std::fabs(rotation.y) > angle_epsilon) {
-        aiMatrix4x4::RotationY(AI_DEG_TO_RAD(rotation.y), temp[1]);
-        is_id[1] = false;
-    }
-    if (std::fabs(rotation.x) > angle_epsilon) {
-        aiMatrix4x4::RotationX(AI_DEG_TO_RAD(rotation.x), temp[0]);
-        is_id[0] = false;
-    }
-
-    int order[3] = { -1, -1, -1 };
-
-    // note: rotation order is inverted since we're left multiplying as is usual in assimp
-    switch (mode) {
-        case Model::RotOrder_EulerXYZ:
-            order[0] = 2;
-            order[1] = 1;
-            order[2] = 0;
-            break;
-
-        case Model::RotOrder_EulerXZY:
-            order[0] = 1;
-            order[1] = 2;
-            order[2] = 0;
-            break;
-
-        case Model::RotOrder_EulerYZX:
-            order[0] = 0;
-            order[1] = 2;
-            order[2] = 1;
-            break;
-
-        case Model::RotOrder_EulerYXZ:
-            order[0] = 2;
-            order[1] = 0;
-            order[2] = 1;
-            break;
-
-        case Model::RotOrder_EulerZXY:
-            order[0] = 1;
-            order[1] = 0;
-            order[2] = 2;
-            break;
-
-        case Model::RotOrder_EulerZYX:
-            order[0] = 0;
-            order[1] = 1;
-            order[2] = 2;
-            break;
-
-        default:
-            ai_assert(false);
-            break;
-    }
-
-    ai_assert(order[0] >= 0);
-    ai_assert(order[0] <= 2);
-    ai_assert(order[1] >= 0);
-    ai_assert(order[1] <= 2);
-    ai_assert(order[2] >= 0);
-    ai_assert(order[2] <= 2);
-
-    if (!is_id[order[0]]) {
-        out = temp[order[0]];
-    }
-
-    if (!is_id[order[1]]) {
-        out = out * temp[order[1]];
-    }
-
-    if (!is_id[order[2]]) {
-        out = out * temp[order[2]];
-    }
-}
-
-bool FBXConverter::NeedsComplexTransformationChain(const Model &model) {
-    const PropertyTable &props = model.Props();
-    bool ok;
-
-    const float zero_epsilon = ai_epsilon;
-    const aiVector3D all_ones(1.0f, 1.0f, 1.0f);
-    for (size_t i = 0; i < TransformationComp_MAXIMUM; ++i) {
-        const TransformationComp comp = static_cast<TransformationComp>(i);
-
-        if (comp == TransformationComp_Rotation || comp == TransformationComp_Scaling || comp == TransformationComp_Translation ||
-            comp == TransformationComp_PreRotation || comp == TransformationComp_PostRotation) {
-            continue;
-        }
-
-        bool scale_compare = (comp == TransformationComp_GeometricScaling || comp == TransformationComp_Scaling);
-
-        const aiVector3D &v = PropertyGet<aiVector3D>(props, NameTransformationCompProperty(comp), ok);
-        if (ok && scale_compare) {
-            if ((v - all_ones).SquareLength() > zero_epsilon) {
-                return true;
-            }
-        } else if (ok) {
-            if (v.SquareLength() > zero_epsilon) {
-                return true;
-            }
-        }
-    }
-
-    return false;
-}
-
-std::string FBXConverter::NameTransformationChainNode(const std::string &name, TransformationComp comp) {
-    return name + std::string(MAGIC_NODE_TAG) + "_" + NameTransformationComp(comp);
-}
-
-bool FBXConverter::GenerateTransformationNodeChain(const Model &model, const std::string &name, std::vector<PotentialNode> &output_nodes,
-        std::vector<PotentialNode> &post_output_nodes) {
-    const PropertyTable &props = model.Props();
-    const Model::RotOrder rot = model.RotationOrder();
-
-    bool ok;
-
-    aiMatrix4x4 chain[TransformationComp_MAXIMUM];
-
-    ai_assert(TransformationComp_MAXIMUM < 32);
-    std::uint32_t chainBits = 0;
-    // A node won't need a node chain if it only has these.
-    const std::uint32_t chainMaskSimple = (1 << TransformationComp_Translation) + (1 << TransformationComp_Scaling) + (1 << TransformationComp_Rotation);
-    // A node will need a node chain if it has any of these.
-    const std::uint32_t chainMaskComplex = ((1 << (TransformationComp_MAXIMUM)) - 1) - chainMaskSimple;
-
-    std::fill_n(chain, static_cast<unsigned int>(TransformationComp_MAXIMUM), aiMatrix4x4());
-
-    // generate transformation matrices for all the different transformation components
-    const float zero_epsilon = Math::getEpsilon<float>();
-    const aiVector3D all_ones(1.0f, 1.0f, 1.0f);
-
-    const aiVector3D &PreRotation = PropertyGet<aiVector3D>(props, "PreRotation", ok);
-    if (ok && PreRotation.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_PreRotation);
-
-        GetRotationMatrix(Model::RotOrder::RotOrder_EulerXYZ, PreRotation, chain[TransformationComp_PreRotation]);
-    }
-
-    const aiVector3D &PostRotation = PropertyGet<aiVector3D>(props, "PostRotation", ok);
-    if (ok && PostRotation.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_PostRotation);
-
-        GetRotationMatrix(Model::RotOrder::RotOrder_EulerXYZ, PostRotation, chain[TransformationComp_PostRotation]);
-    }
-
-    const aiVector3D &RotationPivot = PropertyGet<aiVector3D>(props, "RotationPivot", ok);
-    if (ok && RotationPivot.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_RotationPivot) | (1 << TransformationComp_RotationPivotInverse);
-
-        aiMatrix4x4::Translation(RotationPivot, chain[TransformationComp_RotationPivot]);
-        aiMatrix4x4::Translation(-RotationPivot, chain[TransformationComp_RotationPivotInverse]);
-    }
-
-    const aiVector3D &RotationOffset = PropertyGet<aiVector3D>(props, "RotationOffset", ok);
-    if (ok && RotationOffset.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_RotationOffset);
-
-        aiMatrix4x4::Translation(RotationOffset, chain[TransformationComp_RotationOffset]);
-    }
-
-    const aiVector3D &ScalingOffset = PropertyGet<aiVector3D>(props, "ScalingOffset", ok);
-    if (ok && ScalingOffset.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_ScalingOffset);
-
-        aiMatrix4x4::Translation(ScalingOffset, chain[TransformationComp_ScalingOffset]);
-    }
-
-    const aiVector3D &ScalingPivot = PropertyGet<aiVector3D>(props, "ScalingPivot", ok);
-    if (ok && ScalingPivot.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_ScalingPivot) | (1 << TransformationComp_ScalingPivotInverse);
-
-        aiMatrix4x4::Translation(ScalingPivot, chain[TransformationComp_ScalingPivot]);
-        aiMatrix4x4::Translation(-ScalingPivot, chain[TransformationComp_ScalingPivotInverse]);
-    }
-
-    const aiVector3D &Translation = PropertyGet<aiVector3D>(props, "Lcl Translation", ok);
-    if (ok && Translation.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_Translation);
-
-        aiMatrix4x4::Translation(Translation, chain[TransformationComp_Translation]);
-    }
-
-    const aiVector3D &Scaling = PropertyGet<aiVector3D>(props, "Lcl Scaling", ok);
-    if (ok && (Scaling - all_ones).SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_Scaling);
-
-        aiMatrix4x4::Scaling(Scaling, chain[TransformationComp_Scaling]);
-    }
-
-    const aiVector3D &Rotation = PropertyGet<aiVector3D>(props, "Lcl Rotation", ok);
-    if (ok && Rotation.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_Rotation);
-
-        GetRotationMatrix(rot, Rotation, chain[TransformationComp_Rotation]);
-    }
-
-    const aiVector3D &GeometricScaling = PropertyGet<aiVector3D>(props, "GeometricScaling", ok);
-    if (ok && (GeometricScaling - all_ones).SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_GeometricScaling);
-        aiMatrix4x4::Scaling(GeometricScaling, chain[TransformationComp_GeometricScaling]);
-        aiVector3D GeometricScalingInverse = GeometricScaling;
-        bool canscale = true;
-        for (unsigned int i = 0; i < 3; ++i) {
-            if (std::fabs(GeometricScalingInverse[i]) > zero_epsilon) {
-                GeometricScalingInverse[i] = 1.0f / GeometricScaling[i];
-            } else {
-                FBXImporter::LogError("cannot invert geometric scaling matrix with a 0.0 scale component");
-                canscale = false;
-                break;
-            }
-        }
-        if (canscale) {
-            chainBits = chainBits | (1 << TransformationComp_GeometricScalingInverse);
-            aiMatrix4x4::Scaling(GeometricScalingInverse, chain[TransformationComp_GeometricScalingInverse]);
-        }
-    }
-
-    const aiVector3D &GeometricRotation = PropertyGet<aiVector3D>(props, "GeometricRotation", ok);
-    if (ok && GeometricRotation.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_GeometricRotation) | (1 << TransformationComp_GeometricRotationInverse);
-        GetRotationMatrix(rot, GeometricRotation, chain[TransformationComp_GeometricRotation]);
-        GetRotationMatrix(rot, GeometricRotation, chain[TransformationComp_GeometricRotationInverse]);
-        chain[TransformationComp_GeometricRotationInverse].Inverse();
-    }
-
-    const aiVector3D &GeometricTranslation = PropertyGet<aiVector3D>(props, "GeometricTranslation", ok);
-    if (ok && GeometricTranslation.SquareLength() > zero_epsilon) {
-        chainBits = chainBits | (1 << TransformationComp_GeometricTranslation) | (1 << TransformationComp_GeometricTranslationInverse);
-        aiMatrix4x4::Translation(GeometricTranslation, chain[TransformationComp_GeometricTranslation]);
-        aiMatrix4x4::Translation(-GeometricTranslation, chain[TransformationComp_GeometricTranslationInverse]);
-    }
-
-    // now, if we have more than just Translation, Scaling and Rotation,
-    // we need to generate a full node chain to accommodate for assimp's
-    // lack to express pivots and offsets.
-    if ((chainBits & chainMaskComplex) && doc.Settings().preservePivots) {
-        FBXImporter::LogInfo("generating full transformation chain for node: ", name);
-
-        // query the anim_chain_bits dictionary to find out which chain elements
-        // have associated node animation channels. These can not be dropped
-        // even if they have identity transform in bind pose.
-        NodeAnimBitMap::const_iterator it = node_anim_chain_bits.find(name);
-        const unsigned int anim_chain_bitmask = (it == node_anim_chain_bits.end() ? 0 : (*it).second);
-
-        unsigned int bit = 0x1;
-        for (size_t i = 0; i < TransformationComp_MAXIMUM; ++i, bit <<= 1) {
-            const TransformationComp comp = static_cast<TransformationComp>(i);
-
-            if ((chainBits & bit) == 0 && (anim_chain_bitmask & bit) == 0) {
-                continue;
-            }
-
-            if (comp == TransformationComp_PostRotation) {
-                chain[i] = chain[i].Inverse();
-            }
-
-            PotentialNode nd;
-            nd->mName.Set(NameTransformationChainNode(name, comp));
-            nd->mTransformation = chain[i];
-
-            // geometric inverses go in a post-node chain
-            if (comp == TransformationComp_GeometricScalingInverse ||
-                    comp == TransformationComp_GeometricRotationInverse ||
-                    comp == TransformationComp_GeometricTranslationInverse) {
-                post_output_nodes.emplace_back(std::move(nd));
-            } else {
-                output_nodes.emplace_back(std::move(nd));
-            }
-        }
-
-        ai_assert(output_nodes.size());
-        return true;
-    }
-
-    // else, we can just multiply the matrices together
-    PotentialNode nd;
-
-    // name passed to the method is already unique
-    nd->mName.Set(name);
-    // for (const auto &transform : chain) {
-    // skip inverse chain for no preservePivots
-    for (unsigned int i = TransformationComp_Translation; i < TransformationComp_MAXIMUM; i++) {
-      nd->mTransformation = nd->mTransformation * chain[i];
-    }
-    output_nodes.push_back(std::move(nd));
-    return false;
-}
-
-void FBXConverter::SetupNodeMetadata(const Model &model, aiNode &nd) {
-    const PropertyTable &props = model.Props();
-    DirectPropertyMap unparsedProperties = props.GetUnparsedProperties();
-
-    // create metadata on node
-    const std::size_t numStaticMetaData = 2;
-    aiMetadata *data = aiMetadata::Alloc(static_cast<unsigned int>(unparsedProperties.size() + numStaticMetaData));
-    nd.mMetaData = data;
-    int index = 0;
-
-    // find user defined properties (3ds Max)
-    data->Set(index++, "UserProperties", aiString(PropertyGet<std::string>(props, "UDP3DSMAX", "")));
-    // preserve the info that a node was marked as Null node in the original file.
-    data->Set(index++, "IsNull", model.IsNull() ? true : false);
-
-    // add unparsed properties to the node's metadata
-    for (const DirectPropertyMap::value_type &prop : unparsedProperties) {
-        // Interpret the property as a concrete type
-        if (const TypedProperty<bool> *interpretedBool = prop.second->As<TypedProperty<bool>>()) {
-            data->Set(index++, prop.first, interpretedBool->Value());
-        } else if (const TypedProperty<int> *interpretedInt = prop.second->As<TypedProperty<int>>()) {
-            data->Set(index++, prop.first, interpretedInt->Value());
-        } else if (const TypedProperty<uint64_t> *interpretedUint64 = prop.second->As<TypedProperty<uint64_t>>()) {
-            data->Set(index++, prop.first, interpretedUint64->Value());
-        } else if (const TypedProperty<float> *interpretedFloat = prop.second->As<TypedProperty<float>>()) {
-            data->Set(index++, prop.first, interpretedFloat->Value());
-        } else if (const TypedProperty<std::string> *interpretedString = prop.second->As<TypedProperty<std::string>>()) {
-            data->Set(index++, prop.first, aiString(interpretedString->Value()));
-        } else if (const TypedProperty<aiVector3D> *interpretedVec3 = prop.second->As<TypedProperty<aiVector3D>>()) {
-            data->Set(index++, prop.first, interpretedVec3->Value());
-        } else {
-            ai_assert(false);
-        }
-    }
-}
-
-void FBXConverter::ConvertModel(const Model &model, aiNode *parent, aiNode *root_node,
-        const aiMatrix4x4 &absolute_transform) {
-    const std::vector<const Geometry *> &geos = model.GetGeometry();
-
-    std::vector<unsigned int> meshes;
-    meshes.reserve(geos.size());
-
-    for (const Geometry *geo : geos) {
-
-        const MeshGeometry *const mesh = dynamic_cast<const MeshGeometry *>(geo);
-        const LineGeometry *const line = dynamic_cast<const LineGeometry *>(geo);
-        if (mesh) {
-            const std::vector<unsigned int> &indices = ConvertMesh(*mesh, model, parent, root_node,
-                    absolute_transform);
-            std::copy(indices.begin(), indices.end(), std::back_inserter(meshes));
-        } else if (line) {
-            const std::vector<unsigned int> &indices = ConvertLine(*line, root_node);
-            std::copy(indices.begin(), indices.end(), std::back_inserter(meshes));
-        } else if (geo) {
-            FBXImporter::LogWarn("ignoring unrecognized geometry: ", geo->Name());
-        } else {
-            FBXImporter::LogWarn("skipping null geometry");
-        }
-    }
-
-    if (meshes.size()) {
-        parent->mMeshes = new unsigned int[meshes.size()]();
-        parent->mNumMeshes = static_cast<unsigned int>(meshes.size());
-
-        std::swap_ranges(meshes.begin(), meshes.end(), parent->mMeshes);
-    }
-}
-
-std::vector<unsigned int>
-FBXConverter::ConvertMesh(const MeshGeometry &mesh, const Model &model, aiNode *parent, aiNode *root_node,
-        const aiMatrix4x4 &absolute_transform) {
-    std::vector<unsigned int> temp;
-
-    MeshMap::const_iterator it = meshes_converted.find(&mesh);
-    if (it != meshes_converted.end()) {
-        std::copy((*it).second.begin(), (*it).second.end(), std::back_inserter(temp));
-        return temp;
-    }
-
-    const std::vector<aiVector3D> &vertices = mesh.GetVertices();
-    const std::vector<unsigned int> &faces = mesh.GetFaceIndexCounts();
-    if (vertices.empty() || faces.empty()) {
-        FBXImporter::LogWarn("ignoring empty geometry: ", mesh.Name());
-        return temp;
-    }
-
-    // one material per mesh maps easily to aiMesh. Multiple material
-    // meshes need to be split.
-    const MatIndexArray &mindices = mesh.GetMaterialIndices();
-    if (doc.Settings().readMaterials && !mindices.empty()) {
-        const MatIndexArray::value_type base = mindices[0];
-        for (MatIndexArray::value_type index : mindices) {
-            if (index != base) {
-                return ConvertMeshMultiMaterial(mesh, model, parent, root_node, absolute_transform);
-            }
-        }
-    }
-
-    // faster code-path, just copy the data
-    temp.push_back(ConvertMeshSingleMaterial(mesh, model, absolute_transform, parent, root_node));
-    return temp;
-}
-
-std::vector<unsigned int> FBXConverter::ConvertLine(const LineGeometry &line, aiNode *root_node) {
-    std::vector<unsigned int> temp;
-
-    const std::vector<aiVector3D> &vertices = line.GetVertices();
-    const std::vector<int> &indices = line.GetIndices();
-    if (vertices.empty() || indices.empty()) {
-        FBXImporter::LogWarn("ignoring empty line: ", line.Name());
-        return temp;
-    }
-
-    aiMesh *const out_mesh = SetupEmptyMesh(line, root_node);
-    out_mesh->mPrimitiveTypes |= aiPrimitiveType_LINE;
-
-    // copy vertices
-    out_mesh->mNumVertices = static_cast<unsigned int>(vertices.size());
-    out_mesh->mVertices = new aiVector3D[out_mesh->mNumVertices];
-    std::copy(vertices.begin(), vertices.end(), out_mesh->mVertices);
-
-    //Number of line segments (faces) is "Number of Points - Number of Endpoints"
-    //N.B.: Endpoints in FbxLine are denoted by negative indices.
-    //If such an Index is encountered, add 1 and multiply by -1 to get the real index.
-    unsigned int epcount = 0;
-    for (unsigned i = 0; i < indices.size(); i++) {
-        if (indices[i] < 0) {
-            epcount++;
-        }
-    }
-    unsigned int pcount = static_cast<unsigned int>(indices.size());
-    unsigned int scount = out_mesh->mNumFaces = pcount - epcount;
-
-    aiFace *fac = out_mesh->mFaces = new aiFace[scount]();
-    for (unsigned int i = 0; i < pcount; ++i) {
-        if (indices[i] < 0) continue;
-        aiFace &f = *fac++;
-        f.mNumIndices = 2; //2 == aiPrimitiveType_LINE
-        f.mIndices = new unsigned int[2];
-        f.mIndices[0] = indices[i];
-        int segid = indices[(i + 1 == pcount ? 0 : i + 1)]; //If we have reached he last point, wrap around
-        f.mIndices[1] = (segid < 0 ? (segid + 1) * -1 : segid); //Convert EndPoint Index to normal Index
-    }
-    temp.push_back(static_cast<unsigned int>(mMeshes.size() - 1));
-    return temp;
-}
-
-aiMesh *FBXConverter::SetupEmptyMesh(const Geometry &mesh, aiNode *parent) {
-    aiMesh *const out_mesh = new aiMesh();
-    mMeshes.push_back(out_mesh);
-    meshes_converted[&mesh].push_back(static_cast<unsigned int>(mMeshes.size() - 1));
-
-    // set name
-    std::string name = mesh.Name();
-    if (name.substr(0, 10) == "Geometry::") {
-        name = name.substr(10);
-    }
-
-    if (name.length()) {
-        out_mesh->mName.Set(name);
-    } else {
-        out_mesh->mName = parent->mName;
-    }
-
-    return out_mesh;
-}
-
-unsigned int FBXConverter::ConvertMeshSingleMaterial(const MeshGeometry &mesh, const Model &model,
-        const aiMatrix4x4 &absolute_transform, aiNode *parent,
-        aiNode *) {
-    const MatIndexArray &mindices = mesh.GetMaterialIndices();
-    aiMesh *const out_mesh = SetupEmptyMesh(mesh, parent);
-
-    const std::vector<aiVector3D> &vertices = mesh.GetVertices();
-    const std::vector<unsigned int> &faces = mesh.GetFaceIndexCounts();
-
-    // copy vertices
-    out_mesh->mNumVertices = static_cast<unsigned int>(vertices.size());
-    out_mesh->mVertices = new aiVector3D[vertices.size()];
-
-    std::copy(vertices.begin(), vertices.end(), out_mesh->mVertices);
-
-    // generate dummy faces
-    out_mesh->mNumFaces = static_cast<unsigned int>(faces.size());
-    aiFace *fac = out_mesh->mFaces = new aiFace[faces.size()]();
-
-    unsigned int cursor = 0;
-    for (unsigned int pcount : faces) {
-        aiFace &f = *fac++;
-        f.mNumIndices = pcount;
-        f.mIndices = new unsigned int[pcount];
-        switch (pcount) {
-            case 1:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_POINT;
-                break;
-            case 2:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_LINE;
-                break;
-            case 3:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_TRIANGLE;
-                break;
-            default:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_POLYGON;
-                break;
-        }
-        for (unsigned int i = 0; i < pcount; ++i) {
-            f.mIndices[i] = cursor++;
-        }
-    }
-
-    // copy normals
-    const std::vector<aiVector3D> &normals = mesh.GetNormals();
-    if (normals.size()) {
-        ai_assert(normals.size() == vertices.size());
-
-        out_mesh->mNormals = new aiVector3D[vertices.size()];
-        std::copy(normals.begin(), normals.end(), out_mesh->mNormals);
-    }
-
-    // copy tangents - assimp requires both tangents and bitangents (binormals)
-    // to be present, or neither of them. Compute binormals from normals
-    // and tangents if needed.
-    const std::vector<aiVector3D> &tangents = mesh.GetTangents();
-    const std::vector<aiVector3D> *binormals = &mesh.GetBinormals();
-
-    if (tangents.size()) {
-        std::vector<aiVector3D> tempBinormals;
-        if (!binormals->size()) {
-            if (normals.size()) {
-                tempBinormals.resize(normals.size());
-                for (unsigned int i = 0; i < tangents.size(); ++i) {
-                    tempBinormals[i] = normals[i] ^ tangents[i];
-                }
-
-                binormals = &tempBinormals;
-            } else {
-                binormals = nullptr;
-            }
-        }
-
-        if (binormals) {
-            ai_assert(tangents.size() == vertices.size());
-            ai_assert(binormals->size() == vertices.size());
-
-            out_mesh->mTangents = new aiVector3D[vertices.size()];
-            std::copy(tangents.begin(), tangents.end(), out_mesh->mTangents);
-
-            out_mesh->mBitangents = new aiVector3D[vertices.size()];
-            std::copy(binormals->begin(), binormals->end(), out_mesh->mBitangents);
-        }
-    }
-
-    // copy texture coords
-    for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-        const std::vector<aiVector2D> &uvs = mesh.GetTextureCoords(i);
-        if (uvs.empty()) {
-            break;
-        }
-
-        aiVector3D *out_uv = out_mesh->mTextureCoords[i] = new aiVector3D[vertices.size()];
-        for (const aiVector2D &v : uvs) {
-            *out_uv++ = aiVector3D(v.x, v.y, 0.0f);
-        }
-
-        out_mesh->SetTextureCoordsName(i, aiString(mesh.GetTextureCoordChannelName(i)));
-
-        out_mesh->mNumUVComponents[i] = 2;
-    }
-
-    // copy vertex colors
-    for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_COLOR_SETS; ++i) {
-        const std::vector<aiColor4D> &colors = mesh.GetVertexColors(i);
-        if (colors.empty()) {
-            break;
-        }
-
-        out_mesh->mColors[i] = new aiColor4D[vertices.size()];
-        std::copy(colors.begin(), colors.end(), out_mesh->mColors[i]);
-    }
-
-    if (!doc.Settings().readMaterials || mindices.empty()) {
-        FBXImporter::LogError("no material assigned to mesh, setting default material");
-        out_mesh->mMaterialIndex = GetDefaultMaterial();
-    } else {
-        ConvertMaterialForMesh(out_mesh, model, mesh, mindices[0]);
-    }
-
-    if (doc.Settings().readWeights && mesh.DeformerSkin() != nullptr) {
-        ConvertWeights(out_mesh, mesh, absolute_transform, parent, NO_MATERIAL_SEPARATION, nullptr);
-    }
-
-    std::vector<aiAnimMesh *> animMeshes;
-    for (const BlendShape *blendShape : mesh.GetBlendShapes()) {
-        for (const BlendShapeChannel *blendShapeChannel : blendShape->BlendShapeChannels()) {
-            const std::vector<const ShapeGeometry *> &shapeGeometries = blendShapeChannel->GetShapeGeometries();
-            for (size_t i = 0; i < shapeGeometries.size(); i++) {
-                aiAnimMesh *animMesh = aiCreateAnimMesh(out_mesh);
-                const ShapeGeometry *shapeGeometry = shapeGeometries.at(i);
-                const std::vector<aiVector3D> &curVertices = shapeGeometry->GetVertices();
-                const std::vector<aiVector3D> &curNormals = shapeGeometry->GetNormals();
-                const std::vector<unsigned int> &curIndices = shapeGeometry->GetIndices();
-                //losing channel name if using shapeGeometry->Name()
-                animMesh->mName.Set(FixAnimMeshName(blendShapeChannel->Name()));
-                for (size_t j = 0; j < curIndices.size(); j++) {
-                    const unsigned int curIndex = curIndices.at(j);
-                    aiVector3D vertex = curVertices.at(j);
-                    aiVector3D normal = curNormals.at(j);
-                    unsigned int count = 0;
-                    const unsigned int *outIndices = mesh.ToOutputVertexIndex(curIndex, count);
-                    for (unsigned int k = 0; k < count; k++) {
-                        unsigned int index = outIndices[k];
-                        animMesh->mVertices[index] += vertex;
-                        if (animMesh->mNormals != nullptr) {
-                            animMesh->mNormals[index] += normal;
-                            animMesh->mNormals[index].NormalizeSafe();
-                        }
-                    }
-                }
-                animMesh->mWeight = shapeGeometries.size() > 1 ? blendShapeChannel->DeformPercent() / 100.0f : 1.0f;
-                animMeshes.push_back(animMesh);
-            }
-        }
-    }
-    const size_t numAnimMeshes = animMeshes.size();
-    if (numAnimMeshes > 0) {
-        out_mesh->mNumAnimMeshes = static_cast<unsigned int>(numAnimMeshes);
-        out_mesh->mAnimMeshes = new aiAnimMesh *[numAnimMeshes];
-        for (size_t i = 0; i < numAnimMeshes; i++) {
-            out_mesh->mAnimMeshes[i] = animMeshes.at(i);
-        }
-    }
-    return static_cast<unsigned int>(mMeshes.size() - 1);
-}
-
-std::vector<unsigned int>
-FBXConverter::ConvertMeshMultiMaterial(const MeshGeometry &mesh, const Model &model, aiNode *parent,
-        aiNode *root_node,
-        const aiMatrix4x4 &absolute_transform) {
-    const MatIndexArray &mindices = mesh.GetMaterialIndices();
-    ai_assert(mindices.size());
-
-    std::set<MatIndexArray::value_type> had;
-    std::vector<unsigned int> indices;
-
-    for (MatIndexArray::value_type index : mindices) {
-        if (had.find(index) == had.end()) {
-
-            indices.push_back(ConvertMeshMultiMaterial(mesh, model, index, parent, root_node, absolute_transform));
-            had.insert(index);
-        }
-    }
-
-    return indices;
-}
-
-unsigned int FBXConverter::ConvertMeshMultiMaterial(const MeshGeometry &mesh, const Model &model,
-        MatIndexArray::value_type index,
-        aiNode *parent, aiNode *,
-        const aiMatrix4x4 &absolute_transform) {
-    aiMesh *const out_mesh = SetupEmptyMesh(mesh, parent);
-
-    const MatIndexArray &mindices = mesh.GetMaterialIndices();
-    const std::vector<aiVector3D> &vertices = mesh.GetVertices();
-    const std::vector<unsigned int> &faces = mesh.GetFaceIndexCounts();
-
-    const bool process_weights = doc.Settings().readWeights && mesh.DeformerSkin() != nullptr;
-
-    unsigned int count_faces = 0;
-    unsigned int count_vertices = 0;
-
-    // count faces
-    std::vector<unsigned int>::const_iterator itf = faces.begin();
-    for (MatIndexArray::const_iterator it = mindices.begin(),
-                                       end = mindices.end();
-            it != end; ++it, ++itf) {
-        if ((*it) != index) {
-            continue;
-        }
-        ++count_faces;
-        count_vertices += *itf;
-    }
-
-    ai_assert(count_faces);
-    ai_assert(count_vertices);
-
-    // mapping from output indices to DOM indexing, needed to resolve weights or blendshapes
-    std::vector<unsigned int> reverseMapping;
-    std::map<unsigned int, unsigned int> translateIndexMap;
-    if (process_weights || mesh.GetBlendShapes().size() > 0) {
-        reverseMapping.resize(count_vertices);
-    }
-
-    // allocate output data arrays, but don't fill them yet
-    out_mesh->mNumVertices = count_vertices;
-    out_mesh->mVertices = new aiVector3D[count_vertices];
-
-    out_mesh->mNumFaces = count_faces;
-    aiFace *fac = out_mesh->mFaces = new aiFace[count_faces]();
-
-    // allocate normals
-    const std::vector<aiVector3D> &normals = mesh.GetNormals();
-    if (normals.size()) {
-        ai_assert(normals.size() == vertices.size());
-        out_mesh->mNormals = new aiVector3D[count_vertices];
-    }
-
-    // allocate tangents, binormals.
-    const std::vector<aiVector3D> &tangents = mesh.GetTangents();
-    const std::vector<aiVector3D> *binormals = &mesh.GetBinormals();
-    std::vector<aiVector3D> tempBinormals;
-
-    if (tangents.size()) {
-        if (!binormals->size()) {
-            if (normals.size()) {
-                // XXX this computes the binormals for the entire mesh, not only
-                // the part for which we need them.
-                tempBinormals.resize(normals.size());
-                for (unsigned int i = 0; i < tangents.size(); ++i) {
-                    tempBinormals[i] = normals[i] ^ tangents[i];
-                }
-
-                binormals = &tempBinormals;
-            } else {
-                binormals = nullptr;
-            }
-        }
-
-        if (binormals) {
-            ai_assert(tangents.size() == vertices.size());
-            ai_assert(binormals->size() == vertices.size());
-
-            out_mesh->mTangents = new aiVector3D[count_vertices];
-            out_mesh->mBitangents = new aiVector3D[count_vertices];
-        }
-    }
-
-    // allocate texture coords
-    unsigned int num_uvs = 0;
-    for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i, ++num_uvs) {
-        const std::vector<aiVector2D> &uvs = mesh.GetTextureCoords(i);
-        if (uvs.empty()) {
-            break;
-        }
-
-        out_mesh->mTextureCoords[i] = new aiVector3D[count_vertices];
-        out_mesh->mNumUVComponents[i] = 2;
-    }
-
-    // allocate vertex colors
-    unsigned int num_vcs = 0;
-    for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_COLOR_SETS; ++i, ++num_vcs) {
-        const std::vector<aiColor4D> &colors = mesh.GetVertexColors(i);
-        if (colors.empty()) {
-            break;
-        }
-
-        out_mesh->mColors[i] = new aiColor4D[count_vertices];
-    }
-
-    unsigned int cursor = 0, in_cursor = 0;
-
-    itf = faces.begin();
-    for (MatIndexArray::const_iterator it = mindices.begin(), end = mindices.end(); it != end; ++it, ++itf) {
-        const unsigned int pcount = *itf;
-        if ((*it) != index) {
-            in_cursor += pcount;
-            continue;
-        }
-
-        aiFace &f = *fac++;
-
-        f.mNumIndices = pcount;
-        f.mIndices = new unsigned int[pcount];
-        switch (pcount) {
-            case 1:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_POINT;
-                break;
-            case 2:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_LINE;
-                break;
-            case 3:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_TRIANGLE;
-                break;
-            default:
-                out_mesh->mPrimitiveTypes |= aiPrimitiveType_POLYGON;
-                break;
-        }
-        for (unsigned int i = 0; i < pcount; ++i, ++cursor, ++in_cursor) {
-            f.mIndices[i] = cursor;
-
-            if (reverseMapping.size()) {
-                reverseMapping[cursor] = in_cursor;
-                translateIndexMap[in_cursor] = cursor;
-            }
-
-            out_mesh->mVertices[cursor] = vertices[in_cursor];
-
-            if (out_mesh->mNormals) {
-                out_mesh->mNormals[cursor] = normals[in_cursor];
-            }
-
-            if (out_mesh->mTangents) {
-                out_mesh->mTangents[cursor] = tangents[in_cursor];
-                out_mesh->mBitangents[cursor] = (*binormals)[in_cursor];
-            }
-
-            for (unsigned int j = 0; j < num_uvs; ++j) {
-                const std::vector<aiVector2D> &uvs = mesh.GetTextureCoords(j);
-                out_mesh->mTextureCoords[j][cursor] = aiVector3D(uvs[in_cursor].x, uvs[in_cursor].y, 0.0f);
-            }
-
-            for (unsigned int j = 0; j < num_vcs; ++j) {
-                const std::vector<aiColor4D> &cols = mesh.GetVertexColors(j);
-                out_mesh->mColors[j][cursor] = cols[in_cursor];
-            }
-        }
-    }
-
-    ConvertMaterialForMesh(out_mesh, model, mesh, index);
-
-    if (process_weights) {
-        ConvertWeights(out_mesh, mesh, absolute_transform, parent, index, &reverseMapping);
-    }
-
-    std::vector<aiAnimMesh *> animMeshes;
-    for (const BlendShape *blendShape : mesh.GetBlendShapes()) {
-        for (const BlendShapeChannel *blendShapeChannel : blendShape->BlendShapeChannels()) {
-            const std::vector<const ShapeGeometry *> &shapeGeometries = blendShapeChannel->GetShapeGeometries();
-            for (size_t i = 0; i < shapeGeometries.size(); i++) {
-                aiAnimMesh *animMesh = aiCreateAnimMesh(out_mesh);
-                const ShapeGeometry *shapeGeometry = shapeGeometries.at(i);
-                const std::vector<aiVector3D> &curVertices = shapeGeometry->GetVertices();
-                const std::vector<aiVector3D> &curNormals = shapeGeometry->GetNormals();
-                const std::vector<unsigned int> &curIndices = shapeGeometry->GetIndices();
-                animMesh->mName.Set(FixAnimMeshName(shapeGeometry->Name()));
-                for (size_t j = 0; j < curIndices.size(); j++) {
-                    unsigned int curIndex = curIndices.at(j);
-                    aiVector3D vertex = curVertices.at(j);
-                    aiVector3D normal = curNormals.at(j);
-                    unsigned int count = 0;
-                    const unsigned int *outIndices = mesh.ToOutputVertexIndex(curIndex, count);
-                    for (unsigned int k = 0; k < count; k++) {
-                        unsigned int outIndex = outIndices[k];
-                        if (translateIndexMap.find(outIndex) == translateIndexMap.end())
-                            continue;
-                        unsigned int transIndex = translateIndexMap[outIndex];
-                        animMesh->mVertices[transIndex] += vertex;
-                        if (animMesh->mNormals != nullptr) {
-                            animMesh->mNormals[transIndex] += normal;
-                            animMesh->mNormals[transIndex].NormalizeSafe();
-                        }
-                    }
-                }
-                animMesh->mWeight = shapeGeometries.size() > 1 ? blendShapeChannel->DeformPercent() / 100.0f : 1.0f;
-                animMeshes.push_back(animMesh);
-            }
-        }
-    }
-
-    const size_t numAnimMeshes = animMeshes.size();
-    if (numAnimMeshes > 0) {
-        out_mesh->mNumAnimMeshes = static_cast<unsigned int>(numAnimMeshes);
-        out_mesh->mAnimMeshes = new aiAnimMesh *[numAnimMeshes];
-        for (size_t i = 0; i < numAnimMeshes; i++) {
-            out_mesh->mAnimMeshes[i] = animMeshes.at(i);
-        }
-    }
-
-    return static_cast<unsigned int>(mMeshes.size() - 1);
-}
-
-void FBXConverter::ConvertWeights(aiMesh *out, const MeshGeometry &geo,
-        const aiMatrix4x4 &absolute_transform,
-        aiNode *parent, unsigned int materialIndex,
-        std::vector<unsigned int> *outputVertStartIndices) {
-    ai_assert(geo.DeformerSkin());
-
-    std::vector<size_t> out_indices;
-    std::vector<size_t> index_out_indices;
-    std::vector<size_t> count_out_indices;
-
-    const Skin &sk = *geo.DeformerSkin();
-
-    std::vector<aiBone *> bones;
-
-    const bool no_mat_check = materialIndex == NO_MATERIAL_SEPARATION;
-    ai_assert(no_mat_check || outputVertStartIndices);
-
-    try {
-        // iterate over the sub deformers
-        for (const Cluster *cluster : sk.Clusters()) {
-            ai_assert(cluster);
-
-            const WeightIndexArray &indices = cluster->GetIndices();
-
-            const MatIndexArray &mats = geo.GetMaterialIndices();
-
-            const size_t no_index_sentinel = std::numeric_limits<size_t>::max();
-
-            count_out_indices.clear();
-            index_out_indices.clear();
-            out_indices.clear();
-
-            // now check if *any* of these weights is contained in the output mesh,
-            // taking notes so we don't need to do it twice.
-            for (WeightIndexArray::value_type index : indices) {
-
-                unsigned int count = 0;
-                const unsigned int *const out_idx = geo.ToOutputVertexIndex(index, count);
-                // ToOutputVertexIndex only returns nullptr if index is out of bounds
-                // which should never happen
-                ai_assert(out_idx != nullptr);
-
-                index_out_indices.push_back(no_index_sentinel);
-                count_out_indices.push_back(0);
-
-                for (unsigned int i = 0; i < count; ++i) {
-                    if (no_mat_check || static_cast<size_t>(mats[geo.FaceForVertexIndex(out_idx[i])]) == materialIndex) {
-
-                        if (index_out_indices.back() == no_index_sentinel) {
-                            index_out_indices.back() = out_indices.size();
-                        }
-
-                        if (no_mat_check) {
-                            out_indices.push_back(out_idx[i]);
-                        } else {
-                            // this extra lookup is in O(logn), so the entire algorithm becomes O(nlogn)
-                            const std::vector<unsigned int>::iterator it = std::lower_bound(
-                                    outputVertStartIndices->begin(),
-                                    outputVertStartIndices->end(),
-                                    out_idx[i]);
-
-                            out_indices.push_back(std::distance(outputVertStartIndices->begin(), it));
-                        }
-
-                        ++count_out_indices.back();
-                    }
-                }
-            }
-
-            // if we found at least one, generate the output bones
-            // XXX this could be heavily simplified by collecting the bone
-            // data in a single step.
-            ConvertCluster(bones, cluster, out_indices, index_out_indices,
-                    count_out_indices, absolute_transform, parent);
-        }
-
-        bone_map.clear();
-    } catch (std::exception &) {
-        std::for_each(bones.begin(), bones.end(), Util::delete_fun<aiBone>());
-        throw;
-    }
-
-    if (bones.empty()) {
-        out->mBones = nullptr;
-        out->mNumBones = 0;
-        return;
-    } else {
-        out->mBones = new aiBone *[bones.size()]();
-        out->mNumBones = static_cast<unsigned int>(bones.size());
-
-        std::swap_ranges(bones.begin(), bones.end(), out->mBones);
-    }
-}
-
-const aiNode *GetNodeByName(aiNode *current_node) {
-    aiNode *iter = current_node;
-    //printf("Child count: %d", iter->mNumChildren);
-    return iter;
-}
-
-void FBXConverter::ConvertCluster(std::vector<aiBone *> &local_mesh_bones, const Cluster *cl,
-        std::vector<size_t> &out_indices, std::vector<size_t> &index_out_indices,
-        std::vector<size_t> &count_out_indices, const aiMatrix4x4 &absolute_transform,
-        aiNode *) {
-    ai_assert(cl); // make sure cluster valid
-    std::string deformer_name = cl->TargetNode()->Name();
-    aiString bone_name = aiString(FixNodeName(deformer_name));
-
-    aiBone *bone = nullptr;
-
-    if (bone_map.count(deformer_name)) {
-        ASSIMP_LOG_VERBOSE_DEBUG("retrieved bone from lookup ", bone_name.C_Str(), ". Deformer:", deformer_name);
-        bone = bone_map[deformer_name];
-    } else {
-        ASSIMP_LOG_VERBOSE_DEBUG("created new bone ", bone_name.C_Str(), ". Deformer: ", deformer_name);
-        bone = new aiBone();
-        bone->mName = bone_name;
-
-        // store local transform link for post processing
-        bone->mOffsetMatrix = cl->TransformLink();
-        bone->mOffsetMatrix.Inverse();
-
-        aiMatrix4x4 matrix = (aiMatrix4x4)absolute_transform;
-
-        bone->mOffsetMatrix = bone->mOffsetMatrix * matrix; // * mesh_offset
-
-        //
-        // Now calculate the aiVertexWeights
-        //
-
-        aiVertexWeight *cursor = nullptr;
-
-        bone->mNumWeights = static_cast<unsigned int>(out_indices.size());
-        cursor = bone->mWeights = new aiVertexWeight[out_indices.size()];
-
-        const size_t no_index_sentinel = std::numeric_limits<size_t>::max();
-        const WeightArray &weights = cl->GetWeights();
-
-        const size_t c = index_out_indices.size();
-        for (size_t i = 0; i < c; ++i) {
-            const size_t index_index = index_out_indices[i];
-
-            if (index_index == no_index_sentinel) {
-                continue;
-            }
-
-            const size_t cc = count_out_indices[i];
-            for (size_t j = 0; j < cc; ++j) {
-                // cursor runs from first element relative to the start
-                // or relative to the start of the next indexes.
-                aiVertexWeight &out_weight = *cursor++;
-
-                out_weight.mVertexId = static_cast<unsigned int>(out_indices[index_index + j]);
-                out_weight.mWeight = weights[i];
-            }
-        }
-
-        bone_map.insert(std::pair<const std::string, aiBone *>(deformer_name, bone));
-    }
-
-    ASSIMP_LOG_DEBUG("bone research: Indices size: ", out_indices.size());
-
-    // lookup must be populated in case something goes wrong
-    // this also allocates bones to mesh instance outside
-    local_mesh_bones.push_back(bone);
-}
-
-void FBXConverter::ConvertMaterialForMesh(aiMesh *out, const Model &model, const MeshGeometry &geo,
-        MatIndexArray::value_type materialIndex) {
-    // locate source materials for this mesh
-    const std::vector<const Material *> &mats = model.GetMaterials();
-    if (static_cast<unsigned int>(materialIndex) >= mats.size() || materialIndex < 0) {
-        FBXImporter::LogError("material index out of bounds, setting default material");
-        out->mMaterialIndex = GetDefaultMaterial();
-        return;
-    }
-
-    const Material *const mat = mats[materialIndex];
-    MaterialMap::const_iterator it = materials_converted.find(mat);
-    if (it != materials_converted.end()) {
-        out->mMaterialIndex = (*it).second;
-        return;
-    }
-
-    out->mMaterialIndex = ConvertMaterial(*mat, &geo);
-    materials_converted[mat] = out->mMaterialIndex;
-}
-
-unsigned int FBXConverter::GetDefaultMaterial() {
-    if (defaultMaterialIndex) {
-        return defaultMaterialIndex - 1;
-    }
-
-    aiMaterial *out_mat = new aiMaterial();
-    materials.push_back(out_mat);
-
-    const aiColor3D diffuse = aiColor3D(0.8f, 0.8f, 0.8f);
-    out_mat->AddProperty(&diffuse, 1, AI_MATKEY_COLOR_DIFFUSE);
-
-    aiString s;
-    s.Set(AI_DEFAULT_MATERIAL_NAME);
-
-    out_mat->AddProperty(&s, AI_MATKEY_NAME);
-
-    defaultMaterialIndex = static_cast<unsigned int>(materials.size());
-    return defaultMaterialIndex - 1;
-}
-
-unsigned int FBXConverter::ConvertMaterial(const Material &material, const MeshGeometry *const mesh) {
-    const PropertyTable &props = material.Props();
-
-    // generate empty output material
-    aiMaterial *out_mat = new aiMaterial();
-    materials_converted[&material] = static_cast<unsigned int>(materials.size());
-
-    materials.push_back(out_mat);
-
-    aiString str;
-
-    // strip Material:: prefix
-    std::string name = material.Name();
-    if (name.substr(0, 10) == "Material::") {
-        name = name.substr(10);
-    }
-
-    // set material name if not empty - this could happen
-    // and there should be no key for it in this case.
-    if (name.length()) {
-        str.Set(name);
-        out_mat->AddProperty(&str, AI_MATKEY_NAME);
-    }
-
-    // Set the shading mode as best we can: The FBX specification only mentions Lambert and Phong, and only Phong is mentioned in Assimp's aiShadingMode enum.
-    if (material.GetShadingModel() == "phong") {
-        aiShadingMode shadingMode = aiShadingMode_Phong;
-        out_mat->AddProperty<aiShadingMode>(&shadingMode, 1, AI_MATKEY_SHADING_MODEL);
-    }
-
-    // shading stuff and colors
-    SetShadingPropertiesCommon(out_mat, props);
-    SetShadingPropertiesRaw(out_mat, props, material.Textures(), mesh);
-
-    // texture assignments
-    SetTextureProperties(out_mat, material.Textures(), mesh);
-    SetTextureProperties(out_mat, material.LayeredTextures(), mesh);
-
-    return static_cast<unsigned int>(materials.size() - 1);
-}
-
-unsigned int FBXConverter::ConvertVideo(const Video &video) {
-    // generate empty output texture
-    aiTexture *out_tex = new aiTexture();
-    textures.push_back(out_tex);
-
-    // assuming the texture is compressed
-    out_tex->mWidth = static_cast<unsigned int>(video.ContentLength()); // total data size
-    out_tex->mHeight = 0; // fixed to 0
-
-    // steal the data from the Video to avoid an additional copy
-    out_tex->pcData = reinterpret_cast<aiTexel *>(const_cast<Video &>(video).RelinquishContent());
-
-    // try to extract a hint from the file extension
-    const std::string &filename = video.RelativeFilename().empty() ? video.FileName() : video.RelativeFilename();
-    std::string ext = BaseImporter::GetExtension(filename);
-
-    if (ext == "jpeg") {
-        ext = "jpg";
-    }
-
-    if (ext.size() <= 3) {
-        memcpy(out_tex->achFormatHint, ext.c_str(), ext.size());
-    }
-
-    out_tex->mFilename.Set(filename.c_str());
-
-    return static_cast<unsigned int>(textures.size() - 1);
-}
-
-aiString FBXConverter::GetTexturePath(const Texture *tex) {
-    aiString path;
-    path.Set(tex->RelativeFilename());
-
-    const Video *media = tex->Media();
-    if (media != nullptr) {
-        bool textureReady = false; //tells if our texture is ready (if it was loaded or if it was found)
-        unsigned int index=0;
-
-        VideoMap::const_iterator it = textures_converted.find(media);
-        if (it != textures_converted.end()) {
-            index = (*it).second;
-            textureReady = true;
-        } else {
-            if (media->ContentLength() > 0) {
-                index = ConvertVideo(*media);
-                textures_converted[media] = index;
-                textureReady = true;
-            }
-        }
-
-        // setup texture reference string (copied from ColladaLoader::FindFilenameForEffectTexture), if the texture is ready
-        if (doc.Settings().useLegacyEmbeddedTextureNaming) {
-            if (textureReady) {
-                // TODO: check the possibility of using the flag "AI_CONFIG_IMPORT_FBX_EMBEDDED_TEXTURES_LEGACY_NAMING"
-                // In FBX files textures are now stored internally by Assimp with their filename included
-                // Now Assimp can lookup through the loaded textures after all data is processed
-                // We need to load all textures before referencing them, as FBX file format order may reference a texture before loading it
-                // This may occur on this case too, it has to be studied
-                path.data[0] = '*';
-                path.length = 1 + ASSIMP_itoa10(path.data + 1, MAXLEN - 1, index);
-            }
-        }
-    }
-
-    return path;
-}
-
-void FBXConverter::TrySetTextureProperties(aiMaterial *out_mat, const TextureMap &_textures,
-        const std::string &propName,
-        aiTextureType target, const MeshGeometry *const mesh) {
-    TextureMap::const_iterator it = _textures.find(propName);
-    if (it == _textures.end()) {
-        return;
-    }
-
-    const Texture *const tex = (*it).second;
-    if (tex != nullptr) {
-        aiString path = GetTexturePath(tex);
-        out_mat->AddProperty(&path, _AI_MATKEY_TEXTURE_BASE, target, 0);
-
-        aiUVTransform uvTrafo;
-        // XXX handle all kinds of UV transformations
-        uvTrafo.mScaling = tex->UVScaling();
-        uvTrafo.mTranslation = tex->UVTranslation();
-        uvTrafo.mRotation = tex->UVRotation();
-        out_mat->AddProperty(&uvTrafo, 1, _AI_MATKEY_UVTRANSFORM_BASE, target, 0);
-
-        const PropertyTable &props = tex->Props();
-
-        int uvIndex = 0;
-
-        bool ok;
-        const std::string &uvSet = PropertyGet<std::string>(props, "UVSet", ok);
-        if (ok) {
-            // "default" is the name which usually appears in the FbxFileTexture template
-            if (uvSet != "default" && uvSet.length()) {
-                // this is a bit awkward - we need to find a mesh that uses this
-                // material and scan its UV channels for the given UV name because
-                // assimp references UV channels by index, not by name.
-
-                // XXX: the case that UV channels may appear in different orders
-                // in meshes is unhandled. A possible solution would be to sort
-                // the UV channels alphabetically, but this would have the side
-                // effect that the primary (first) UV channel would sometimes
-                // be moved, causing trouble when users read only the first
-                // UV channel and ignore UV channel assignments altogether.
-
-                const unsigned int matIndex = static_cast<unsigned int>(std::distance(materials.begin(),
-                        std::find(materials.begin(), materials.end(), out_mat)));
-
-                uvIndex = -1;
-                if (!mesh) {
-                    for (const MeshMap::value_type &v : meshes_converted) {
-                        const MeshGeometry *const meshGeom = dynamic_cast<const MeshGeometry *>(v.first);
-                        if (!meshGeom) {
-                            continue;
-                        }
-
-                        const MatIndexArray &mats = meshGeom->GetMaterialIndices();
-                        MatIndexArray::const_iterator curIt = std::find(mats.begin(), mats.end(), (int) matIndex);
-                        if (curIt == mats.end()) {
-                            continue;
-                        }
-
-                        int index = -1;
-                        for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-                            if (meshGeom->GetTextureCoords(i).empty()) {
-                                break;
-                            }
-                            const std::string &name = meshGeom->GetTextureCoordChannelName(i);
-                            if (name == uvSet) {
-                                index = static_cast<int>(i);
-                                break;
-                            }
-                        }
-                        if (index == -1) {
-                            FBXImporter::LogWarn("did not find UV channel named ", uvSet, " in a mesh using this material");
-                            continue;
-                        }
-
-                        if (uvIndex == -1) {
-                            uvIndex = index;
-                        } else {
-                            FBXImporter::LogWarn("the UV channel named ", uvSet,
-                                                 " appears at different positions in meshes, results will be wrong");
-                        }
-                    }
-                } else {
-                    int index = -1;
-                    for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-                        if (mesh->GetTextureCoords(i).empty()) {
-                            break;
-                        }
-                        const std::string &name = mesh->GetTextureCoordChannelName(i);
-                        if (name == uvSet) {
-                            index = static_cast<int>(i);
-                            break;
-                        }
-                    }
-                    if (index == -1) {
-                        FBXImporter::LogWarn("did not find UV channel named ", uvSet, " in a mesh using this material");
-                    }
-
-                    if (uvIndex == -1) {
-                        uvIndex = index;
-                    }
-                }
-
-                if (uvIndex == -1) {
-                    FBXImporter::LogWarn("failed to resolve UV channel ", uvSet, ", using first UV channel");
-                    uvIndex = 0;
-                }
-            }
-        }
-
-        out_mat->AddProperty(&uvIndex, 1, _AI_MATKEY_UVWSRC_BASE, target, 0);
-    }
-}
-
-void FBXConverter::TrySetTextureProperties(aiMaterial *out_mat, const LayeredTextureMap &layeredTextures,
-        const std::string &propName,
-        aiTextureType target, const MeshGeometry *const mesh) {
-    LayeredTextureMap::const_iterator it = layeredTextures.find(propName);
-    if (it == layeredTextures.end()) {
-        return;
-    }
-
-    int texCount = (*it).second->textureCount();
-
-    // Set the blend mode for layered textures
-    int blendmode = (*it).second->GetBlendMode();
-    out_mat->AddProperty(&blendmode, 1, _AI_MATKEY_TEXOP_BASE, target, 0);
-
-    for (int texIndex = 0; texIndex < texCount; texIndex++) {
-
-        const Texture *const tex = (*it).second->getTexture(texIndex);
-
-        aiString path = GetTexturePath(tex);
-        out_mat->AddProperty(&path, _AI_MATKEY_TEXTURE_BASE, target, texIndex);
-
-        aiUVTransform uvTrafo;
-        // XXX handle all kinds of UV transformations
-        uvTrafo.mScaling = tex->UVScaling();
-        uvTrafo.mTranslation = tex->UVTranslation();
-        uvTrafo.mRotation = tex->UVRotation();
-        out_mat->AddProperty(&uvTrafo, 1, _AI_MATKEY_UVTRANSFORM_BASE, target, texIndex);
-
-        const PropertyTable &props = tex->Props();
-
-        int uvIndex = 0;
-
-        bool ok;
-        const std::string &uvSet = PropertyGet<std::string>(props, "UVSet", ok);
-        if (ok) {
-            // "default" is the name which usually appears in the FbxFileTexture template
-            if (uvSet != "default" && uvSet.length()) {
-                // this is a bit awkward - we need to find a mesh that uses this
-                // material and scan its UV channels for the given UV name because
-                // assimp references UV channels by index, not by name.
-
-                // XXX: the case that UV channels may appear in different orders
-                // in meshes is unhandled. A possible solution would be to sort
-                // the UV channels alphabetically, but this would have the side
-                // effect that the primary (first) UV channel would sometimes
-                // be moved, causing trouble when users read only the first
-                // UV channel and ignore UV channel assignments altogether.
-
-                const unsigned int matIndex = static_cast<unsigned int>(std::distance(materials.begin(),
-                        std::find(materials.begin(), materials.end(), out_mat)));
-
-                uvIndex = -1;
-                if (!mesh) {
-                    for (const MeshMap::value_type &v : meshes_converted) {
-                        const MeshGeometry *const meshGeom = dynamic_cast<const MeshGeometry *>(v.first);
-                        if (!meshGeom) {
-                            continue;
-                        }
-
-                        const MatIndexArray &mats = meshGeom->GetMaterialIndices();
-                        MatIndexArray::const_iterator curIt = std::find(mats.begin(), mats.end(), (int) matIndex);
-                        if ( curIt == mats.end()) {
-                            continue;
-                        }
-
-                        int index = -1;
-                        for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-                            if (meshGeom->GetTextureCoords(i).empty()) {
-                                break;
-                            }
-                            const std::string &name = meshGeom->GetTextureCoordChannelName(i);
-                            if (name == uvSet) {
-                                index = static_cast<int>(i);
-                                break;
-                            }
-                        }
-                        if (index == -1) {
-                            FBXImporter::LogWarn("did not find UV channel named ", uvSet, " in a mesh using this material");
-                            continue;
-                        }
-
-                        if (uvIndex == -1) {
-                            uvIndex = index;
-                        } else {
-                            FBXImporter::LogWarn("the UV channel named ", uvSet,
-                                                 " appears at different positions in meshes, results will be wrong");
-                        }
-                    }
-                } else {
-                    int index = -1;
-                    for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-                        if (mesh->GetTextureCoords(i).empty()) {
-                            break;
-                        }
-                        const std::string &name = mesh->GetTextureCoordChannelName(i);
-                        if (name == uvSet) {
-                            index = static_cast<int>(i);
-                            break;
-                        }
-                    }
-                    if (index == -1) {
-                        FBXImporter::LogWarn("did not find UV channel named ", uvSet, " in a mesh using this material");
-                    }
-
-                    if (uvIndex == -1) {
-                        uvIndex = index;
-                    }
-                }
-
-                if (uvIndex == -1) {
-                    FBXImporter::LogWarn("failed to resolve UV channel ", uvSet, ", using first UV channel");
-                    uvIndex = 0;
-                }
-            }
-        }
-
-        out_mat->AddProperty(&uvIndex, 1, _AI_MATKEY_UVWSRC_BASE, target, texIndex);
-    }
-}
-
-void FBXConverter::SetTextureProperties(aiMaterial *out_mat, const TextureMap &_textures, const MeshGeometry *const mesh) {
-    TrySetTextureProperties(out_mat, _textures, "DiffuseColor", aiTextureType_DIFFUSE, mesh);
-    TrySetTextureProperties(out_mat, _textures, "AmbientColor", aiTextureType_AMBIENT, mesh);
-    TrySetTextureProperties(out_mat, _textures, "EmissiveColor", aiTextureType_EMISSIVE, mesh);
-    TrySetTextureProperties(out_mat, _textures, "SpecularColor", aiTextureType_SPECULAR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "SpecularFactor", aiTextureType_SPECULAR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "TransparentColor", aiTextureType_OPACITY, mesh);
-    TrySetTextureProperties(out_mat, _textures, "ReflectionColor", aiTextureType_REFLECTION, mesh);
-    TrySetTextureProperties(out_mat, _textures, "DisplacementColor", aiTextureType_DISPLACEMENT, mesh);
-    TrySetTextureProperties(out_mat, _textures, "NormalMap", aiTextureType_NORMALS, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Bump", aiTextureType_HEIGHT, mesh);
-    TrySetTextureProperties(out_mat, _textures, "ShininessExponent", aiTextureType_SHININESS, mesh);
-    TrySetTextureProperties(out_mat, _textures, "TransparencyFactor", aiTextureType_OPACITY, mesh);
-    TrySetTextureProperties(out_mat, _textures, "EmissiveFactor", aiTextureType_EMISSIVE, mesh);
-    TrySetTextureProperties(out_mat, _textures, "ReflectionFactor", aiTextureType_METALNESS, mesh);
-    //Maya counterparts
-    TrySetTextureProperties(out_mat, _textures, "Maya|DiffuseTexture", aiTextureType_DIFFUSE, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|NormalTexture", aiTextureType_NORMALS, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|SpecularTexture", aiTextureType_SPECULAR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|FalloffTexture", aiTextureType_OPACITY, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|ReflectionMapTexture", aiTextureType_REFLECTION, mesh);
-
-    // Maya PBR
-    TrySetTextureProperties(out_mat, _textures, "Maya|baseColor", aiTextureType_BASE_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|normalCamera", aiTextureType_NORMAL_CAMERA, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|emissionColor", aiTextureType_EMISSION_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|metalness", aiTextureType_METALNESS, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|diffuseRoughness", aiTextureType_DIFFUSE_ROUGHNESS, mesh);
-
-    // Maya stingray
-    TrySetTextureProperties(out_mat, _textures, "Maya|TEX_color_map", aiTextureType_BASE_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|TEX_normal_map", aiTextureType_NORMAL_CAMERA, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|TEX_emissive_map", aiTextureType_EMISSION_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|TEX_metallic_map", aiTextureType_METALNESS, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|TEX_roughness_map", aiTextureType_DIFFUSE_ROUGHNESS, mesh);
-    TrySetTextureProperties(out_mat, _textures, "Maya|TEX_ao_map", aiTextureType_AMBIENT_OCCLUSION, mesh);
-
-    // 3DSMax Physical material
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|Parameters|base_color_map", aiTextureType_BASE_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|Parameters|bump_map", aiTextureType_NORMAL_CAMERA, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|Parameters|emission_map", aiTextureType_EMISSION_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|Parameters|metalness_map", aiTextureType_METALNESS, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|Parameters|roughness_map", aiTextureType_DIFFUSE_ROUGHNESS, mesh);
-
-    // 3DSMax PBR materials
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|main|base_color_map", aiTextureType_BASE_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|main|norm_map", aiTextureType_NORMAL_CAMERA, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|main|emit_color_map", aiTextureType_EMISSION_COLOR, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|main|ao_map", aiTextureType_AMBIENT_OCCLUSION, mesh);
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|main|opacity_map", aiTextureType_OPACITY, mesh);
-    // Metalness/Roughness material type
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|main|metalness_map", aiTextureType_METALNESS, mesh);
-    // Specular/Gloss material type
-    TrySetTextureProperties(out_mat, _textures, "3dsMax|main|specular_map", aiTextureType_SPECULAR, mesh);
-
-    // Glossiness vs roughness in 3ds Max Pbr Materials
-    int useGlossiness;
-    if (out_mat->Get("$raw.3dsMax|main|useGlossiness", aiTextureType_NONE, 0, useGlossiness) == aiReturn_SUCCESS) {
-        // These textures swap meaning if ((useGlossiness == 1) != (material type is Specular/Gloss))
-        if (useGlossiness == 1) {
-            TrySetTextureProperties(out_mat, _textures, "3dsMax|main|roughness_map", aiTextureType_SHININESS, mesh);
-            TrySetTextureProperties(out_mat, _textures, "3dsMax|main|glossiness_map", aiTextureType_SHININESS, mesh);
-        }
-        else if (useGlossiness == 2) {
-            TrySetTextureProperties(out_mat, _textures, "3dsMax|main|roughness_map", aiTextureType_DIFFUSE_ROUGHNESS, mesh);
-            TrySetTextureProperties(out_mat, _textures, "3dsMax|main|glossiness_map", aiTextureType_DIFFUSE_ROUGHNESS, mesh);
-        }
-        else {
-            FBXImporter::LogWarn("A 3dsMax Pbr Material must have a useGlossiness value to correctly interpret roughness and glossiness textures.");
-        }
-    }
-}
-
-void FBXConverter::SetTextureProperties(aiMaterial *out_mat, const LayeredTextureMap &layeredTextures, const MeshGeometry *const mesh) {
-    TrySetTextureProperties(out_mat, layeredTextures, "DiffuseColor", aiTextureType_DIFFUSE, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "AmbientColor", aiTextureType_AMBIENT, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "EmissiveColor", aiTextureType_EMISSIVE, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "SpecularColor", aiTextureType_SPECULAR, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "SpecularFactor", aiTextureType_SPECULAR, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "TransparentColor", aiTextureType_OPACITY, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "ReflectionColor", aiTextureType_REFLECTION, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "DisplacementColor", aiTextureType_DISPLACEMENT, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "NormalMap", aiTextureType_NORMALS, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "Bump", aiTextureType_HEIGHT, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "ShininessExponent", aiTextureType_SHININESS, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "EmissiveFactor", aiTextureType_EMISSIVE, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "TransparencyFactor", aiTextureType_OPACITY, mesh);
-    TrySetTextureProperties(out_mat, layeredTextures, "ReflectionFactor", aiTextureType_METALNESS, mesh);
-}
-
-aiColor3D FBXConverter::GetColorPropertyFactored(const PropertyTable &props, const std::string &colorName,
-        const std::string &factorName, bool &result, bool useTemplate) {
-    result = true;
-
-    bool ok;
-    aiVector3D BaseColor = PropertyGet<aiVector3D>(props, colorName, ok, useTemplate);
-    if (!ok) {
-        result = false;
-        return aiColor3D(0.0f, 0.0f, 0.0f);
-    }
-
-    // if no factor name, return the colour as is
-    if (factorName.empty()) {
-        return aiColor3D(BaseColor.x, BaseColor.y, BaseColor.z);
-    }
-
-    // otherwise it should be multiplied by the factor, if found.
-    float factor = PropertyGet<float>(props, factorName, ok, useTemplate);
-    if (ok) {
-        BaseColor *= factor;
-    }
-    return aiColor3D(BaseColor.x, BaseColor.y, BaseColor.z);
-}
-
-aiColor3D FBXConverter::GetColorPropertyFromMaterial(const PropertyTable &props, const std::string &baseName,
-        bool &result) {
-    return GetColorPropertyFactored(props, baseName + "Color", baseName + "Factor", result, true);
-}
-
-aiColor3D FBXConverter::GetColorProperty(const PropertyTable &props, const std::string &colorName,
-        bool &result, bool useTemplate) {
-    result = true;
-    bool ok;
-    const aiVector3D &ColorVec = PropertyGet<aiVector3D>(props, colorName, ok, useTemplate);
-    if (!ok) {
-        result = false;
-        return aiColor3D(0.0f, 0.0f, 0.0f);
-    }
-    return aiColor3D(ColorVec.x, ColorVec.y, ColorVec.z);
-}
-
-void FBXConverter::SetShadingPropertiesCommon(aiMaterial *out_mat, const PropertyTable &props) {
-    // Set shading properties.
-    // Modern FBX Files have two separate systems for defining these,
-    // with only the more comprehensive one described in the property template.
-    // Likely the other values are a legacy system,
-    // which is still always exported by the official FBX SDK.
-    //
-    // Blender's FBX import and export mostly ignore this legacy system,
-    // and as we only support recent versions of FBX anyway, we can do the same.
-    bool ok;
-
-    const aiColor3D &Diffuse = GetColorPropertyFromMaterial(props, "Diffuse", ok);
-    if (ok) {
-        out_mat->AddProperty(&Diffuse, 1, AI_MATKEY_COLOR_DIFFUSE);
-    }
-
-    const aiColor3D &Emissive = GetColorPropertyFromMaterial(props, "Emissive", ok);
-    if (ok) {
-        out_mat->AddProperty(&Emissive, 1, AI_MATKEY_COLOR_EMISSIVE);
-    } else {
-        const aiColor3D &emissiveColor = GetColorProperty(props, "Maya|emissive", ok);
-        if (ok) {
-            out_mat->AddProperty(&emissiveColor, 1, AI_MATKEY_COLOR_EMISSIVE);
-        }
-     }
-
-    const aiColor3D &Ambient = GetColorPropertyFromMaterial(props, "Ambient", ok);
-    if (ok) {
-        out_mat->AddProperty(&Ambient, 1, AI_MATKEY_COLOR_AMBIENT);
-    }
-
-    // we store specular factor as SHININESS_STRENGTH, so just get the color
-    const aiColor3D &Specular = GetColorProperty(props, "SpecularColor", ok, true);
-    if (ok) {
-        out_mat->AddProperty(&Specular, 1, AI_MATKEY_COLOR_SPECULAR);
-    }
-
-    // and also try to get SHININESS_STRENGTH
-    const float SpecularFactor = PropertyGet<float>(props, "SpecularFactor", ok, true);
-    if (ok) {
-        out_mat->AddProperty(&SpecularFactor, 1, AI_MATKEY_SHININESS_STRENGTH);
-    }
-
-    // and the specular exponent
-    const float ShininessExponent = PropertyGet<float>(props, "ShininessExponent", ok);
-    if (ok) {
-        out_mat->AddProperty(&ShininessExponent, 1, AI_MATKEY_SHININESS);
-    }
-
-    // TransparentColor / TransparencyFactor... gee thanks FBX :rolleyes:
-    const aiColor3D &Transparent = GetColorPropertyFactored(props, "TransparentColor", "TransparencyFactor", ok);
-    float CalculatedOpacity = 1.0f;
-    if (ok) {
-        out_mat->AddProperty(&Transparent, 1, AI_MATKEY_COLOR_TRANSPARENT);
-        // as calculated by FBX SDK 2017:
-        CalculatedOpacity = 1.0f - ((Transparent.r + Transparent.g + Transparent.b) / 3.0f);
-    }
-
-    // try to get the transparency factor
-    const float TransparencyFactor = PropertyGet<float>(props, "TransparencyFactor", ok);
-    if (ok) {
-        out_mat->AddProperty(&TransparencyFactor, 1, AI_MATKEY_TRANSPARENCYFACTOR);
-    }
-
-    // use of TransparencyFactor is inconsistent.
-    // Maya always stores it as 1.0,
-    // so we can't use it to set AI_MATKEY_OPACITY.
-    // Blender is more sensible and stores it as the alpha value.
-    // However both the FBX SDK and Blender always write an additional
-    // legacy "Opacity" field, so we can try to use that.
-    //
-    // If we can't find it,
-    // we can fall back to the value which the FBX SDK calculates
-    // from transparency colour (RGB) and factor (F) as
-    // 1.0 - F*((R+G+B)/3).
-    //
-    // There's no consistent way to interpret this opacity value,
-    // so it's up to clients to do the correct thing.
-    const float Opacity = PropertyGet<float>(props, "Opacity", ok);
-    if (ok) {
-        out_mat->AddProperty(&Opacity, 1, AI_MATKEY_OPACITY);
-    } else if (CalculatedOpacity != 1.0) {
-        out_mat->AddProperty(&CalculatedOpacity, 1, AI_MATKEY_OPACITY);
-    }
-
-    // reflection color and factor are stored separately
-    const aiColor3D &Reflection = GetColorProperty(props, "ReflectionColor", ok, true);
-    if (ok) {
-        out_mat->AddProperty(&Reflection, 1, AI_MATKEY_COLOR_REFLECTIVE);
-    }
-
-    float ReflectionFactor = PropertyGet<float>(props, "ReflectionFactor", ok, true);
-    if (ok) {
-        out_mat->AddProperty(&ReflectionFactor, 1, AI_MATKEY_REFLECTIVITY);
-    }
-
-    const float BumpFactor = PropertyGet<float>(props, "BumpFactor", ok);
-    if (ok) {
-        out_mat->AddProperty(&BumpFactor, 1, AI_MATKEY_BUMPSCALING);
-    }
-
-    const float DispFactor = PropertyGet<float>(props, "DisplacementFactor", ok);
-    if (ok) {
-        out_mat->AddProperty(&DispFactor, 1, "$mat.displacementscaling", 0, 0);
-    }
-
-    // PBR material information
-    const aiColor3D &baseColor = GetColorProperty(props, "Maya|base_color", ok);
-    if (ok) {
-        out_mat->AddProperty(&baseColor, 1, AI_MATKEY_BASE_COLOR);
-    }
-
-    const float useColorMap = PropertyGet<float>(props, "Maya|use_color_map", ok);
-    if (ok) {
-        out_mat->AddProperty(&useColorMap, 1, AI_MATKEY_USE_COLOR_MAP);
-    }
-
-    const float useMetallicMap = PropertyGet<float>(props, "Maya|use_metallic_map", ok);
-    if (ok) {
-        out_mat->AddProperty(&useMetallicMap, 1, AI_MATKEY_USE_METALLIC_MAP);
-    }
-
-    const float metallicFactor = PropertyGet<float>(props, "Maya|metallic", ok);
-    if (ok) {
-        out_mat->AddProperty(&metallicFactor, 1, AI_MATKEY_METALLIC_FACTOR);
-    }
-
-    const float useRoughnessMap = PropertyGet<float>(props, "Maya|use_roughness_map", ok);
-    if (ok) {
-        out_mat->AddProperty(&useRoughnessMap, 1, AI_MATKEY_USE_ROUGHNESS_MAP);
-    }
-
-    const float roughnessFactor = PropertyGet<float>(props, "Maya|roughness", ok);
-    if (ok) {
-        out_mat->AddProperty(&roughnessFactor, 1, AI_MATKEY_ROUGHNESS_FACTOR);
-    }
-
-    const float useEmissiveMap = PropertyGet<float>(props, "Maya|use_emissive_map", ok);
-    if (ok) {
-        out_mat->AddProperty(&useEmissiveMap, 1, AI_MATKEY_USE_EMISSIVE_MAP);
-    }
-
-    const float emissiveIntensity = PropertyGet<float>(props, "Maya|emissive_intensity", ok);
-    if (ok) {
-        out_mat->AddProperty(&emissiveIntensity, 1, AI_MATKEY_EMISSIVE_INTENSITY);
-    }
-
-    const float useAOMap = PropertyGet<float>(props, "Maya|use_ao_map", ok);
-    if (ok) {
-        out_mat->AddProperty(&useAOMap, 1, AI_MATKEY_USE_AO_MAP);
-    }
-}
-
-void FBXConverter::SetShadingPropertiesRaw(aiMaterial *out_mat, const PropertyTable &props, const TextureMap &_textures, const MeshGeometry *const mesh) {
-    // Add all the unparsed properties with a "$raw." prefix
-
-    const std::string prefix = "$raw.";
-
-    for (const DirectPropertyMap::value_type &prop : props.GetUnparsedProperties()) {
-
-        std::string name = prefix + prop.first;
-
-        if (const TypedProperty<aiVector3D> *interpretedVec3 = prop.second->As<TypedProperty<aiVector3D>>()) {
-            out_mat->AddProperty(&interpretedVec3->Value(), 1, name.c_str(), 0, 0);
-        } else if (const TypedProperty<aiColor3D> *interpretedCol3 = prop.second->As<TypedProperty<aiColor3D>>()) {
-            out_mat->AddProperty(&interpretedCol3->Value(), 1, name.c_str(), 0, 0);
-        } else if (const TypedProperty<aiColor4D> *interpretedCol4 = prop.second->As<TypedProperty<aiColor4D>>()) {
-            out_mat->AddProperty(&interpretedCol4->Value(), 1, name.c_str(), 0, 0);
-        } else if (const TypedProperty<float> *interpretedFloat = prop.second->As<TypedProperty<float>>()) {
-            out_mat->AddProperty(&interpretedFloat->Value(), 1, name.c_str(), 0, 0);
-        } else if (const TypedProperty<int> *interpretedInt = prop.second->As<TypedProperty<int>>()) {
-            out_mat->AddProperty(&interpretedInt->Value(), 1, name.c_str(), 0, 0);
-        } else if (const TypedProperty<bool> *interpretedBool = prop.second->As<TypedProperty<bool>>()) {
-            int value = interpretedBool->Value() ? 1 : 0;
-            out_mat->AddProperty(&value, 1, name.c_str(), 0, 0);
-        } else if (const TypedProperty<std::string> *interpretedString = prop.second->As<TypedProperty<std::string>>()) {
-            const aiString value = aiString(interpretedString->Value());
-            out_mat->AddProperty(&value, name.c_str(), 0, 0);
-        }
-    }
-
-    // Add the textures' properties
-
-    for (TextureMap::const_iterator it = _textures.begin(); it != _textures.end(); ++it) {
-
-        std::string name = prefix + it->first;
-
-        const Texture *const tex = it->second;
-        if (tex != nullptr) {
-            aiString path;
-            path.Set(tex->RelativeFilename());
-
-            const Video *media = tex->Media();
-            if (media != nullptr && media->ContentLength() > 0) {
-                unsigned int index;
-
-                VideoMap::const_iterator videoIt = textures_converted.find(media);
-                if (videoIt != textures_converted.end()) {
-                    index = videoIt->second;
-                } else {
-                    index = ConvertVideo(*media);
-                    textures_converted[media] = index;
-                }
-
-                // setup texture reference string (copied from ColladaLoader::FindFilenameForEffectTexture)
-                path.data[0] = '*';
-                path.length = 1 + ASSIMP_itoa10(path.data + 1, MAXLEN - 1, index);
-            }
-
-            out_mat->AddProperty(&path, (name + "|file").c_str(), aiTextureType_UNKNOWN, 0);
-
-            aiUVTransform uvTrafo;
-            // XXX handle all kinds of UV transformations
-            uvTrafo.mScaling = tex->UVScaling();
-            uvTrafo.mTranslation = tex->UVTranslation();
-            uvTrafo.mRotation = tex->UVRotation();
-            out_mat->AddProperty(&uvTrafo, 1, (name + "|uvtrafo").c_str(), aiTextureType_UNKNOWN, 0);
-
-            int uvIndex = 0;
-
-            bool uvFound = false;
-            const std::string &uvSet = PropertyGet<std::string>(tex->Props(), "UVSet", uvFound);
-            if (uvFound) {
-                // "default" is the name which usually appears in the FbxFileTexture template
-                if (uvSet != "default" && uvSet.length()) {
-                    // this is a bit awkward - we need to find a mesh that uses this
-                    // material and scan its UV channels for the given UV name because
-                    // assimp references UV channels by index, not by name.
-
-                    // XXX: the case that UV channels may appear in different orders
-                    // in meshes is unhandled. A possible solution would be to sort
-                    // the UV channels alphabetically, but this would have the side
-                    // effect that the primary (first) UV channel would sometimes
-                    // be moved, causing trouble when users read only the first
-                    // UV channel and ignore UV channel assignments altogether.
-
-                    std::vector<aiMaterial *>::iterator materialIt = std::find(materials.begin(), materials.end(), out_mat);
-                    const unsigned int matIndex = static_cast<unsigned int>(std::distance(materials.begin(), materialIt));
-
-                    uvIndex = -1;
-                    if (!mesh) {
-                        for (const MeshMap::value_type &v : meshes_converted) {
-                            const MeshGeometry *const meshGeom = dynamic_cast<const MeshGeometry *>(v.first);
-                            if (!meshGeom) {
-                                continue;
-                            }
-
-                            const MatIndexArray &mats = meshGeom->GetMaterialIndices();
-                            if (std::find(mats.begin(), mats.end(), (int)matIndex) == mats.end()) {
-                                continue;
-                            }
-
-                            int index = -1;
-                            for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-                                if (meshGeom->GetTextureCoords(i).empty()) {
-                                    break;
-                                }
-                                const std::string &curName = meshGeom->GetTextureCoordChannelName(i);
-                                if (curName == uvSet) {
-                                    index = static_cast<int>(i);
-                                    break;
-                                }
-                            }
-                            if (index == -1) {
-                                FBXImporter::LogWarn("did not find UV channel named ", uvSet, " in a mesh using this material");
-                                continue;
-                            }
-
-                            if (uvIndex == -1) {
-                                uvIndex = index;
-                            } else {
-                                FBXImporter::LogWarn("the UV channel named ", uvSet, " appears at different positions in meshes, results will be wrong");
-                            }
-                        }
-                    } else {
-                        int index = -1;
-                        for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-                            if (mesh->GetTextureCoords(i).empty()) {
-                                break;
-                            }
-                            const std::string &curName = mesh->GetTextureCoordChannelName(i);
-                            if (curName == uvSet) {
-                                index = static_cast<int>(i);
-                                break;
-                            }
-                        }
-                        if (index == -1) {
-                            FBXImporter::LogWarn("did not find UV channel named ", uvSet, " in a mesh using this material");
-                        }
-
-                        if (uvIndex == -1) {
-                            uvIndex = index;
-                        }
-                    }
-
-                    if (uvIndex == -1) {
-                        FBXImporter::LogWarn("failed to resolve UV channel ", uvSet, ", using first UV channel");
-                        uvIndex = 0;
-                    }
-                }
-            }
-
-            out_mat->AddProperty(&uvIndex, 1, (name + "|uvwsrc").c_str(), aiTextureType_UNKNOWN, 0);
-        }
-    }
-}
-
-double FBXConverter::FrameRateToDouble(FileGlobalSettings::FrameRate fp, double customFPSVal) {
-    switch (fp) {
-        case FileGlobalSettings::FrameRate_DEFAULT:
-            return 1.0;
-
-        case FileGlobalSettings::FrameRate_120:
-            return 120.0;
-
-        case FileGlobalSettings::FrameRate_100:
-            return 100.0;
-
-        case FileGlobalSettings::FrameRate_60:
-            return 60.0;
-
-        case FileGlobalSettings::FrameRate_50:
-            return 50.0;
-
-        case FileGlobalSettings::FrameRate_48:
-            return 48.0;
-
-        case FileGlobalSettings::FrameRate_30:
-        case FileGlobalSettings::FrameRate_30_DROP:
-            return 30.0;
-
-        case FileGlobalSettings::FrameRate_NTSC_DROP_FRAME:
-        case FileGlobalSettings::FrameRate_NTSC_FULL_FRAME:
-            return 29.9700262;
-
-        case FileGlobalSettings::FrameRate_PAL:
-            return 25.0;
-
-        case FileGlobalSettings::FrameRate_CINEMA:
-            return 24.0;
-
-        case FileGlobalSettings::FrameRate_1000:
-            return 1000.0;
-
-        case FileGlobalSettings::FrameRate_CINEMA_ND:
-            return 23.976;
-
-        case FileGlobalSettings::FrameRate_CUSTOM:
-            return customFPSVal;
-
-        case FileGlobalSettings::FrameRate_MAX: // this is to silence compiler warnings
-            break;
-    }
-
-    ai_assert(false);
-
-    return -1.0f;
-}
-
-void FBXConverter::ConvertAnimations() {
-    // first of all determine framerate
-    const FileGlobalSettings::FrameRate fps = doc.GlobalSettings().TimeMode();
-    const float custom = doc.GlobalSettings().CustomFrameRate();
-    anim_fps = FrameRateToDouble(fps, custom);
-
-    const std::vector<const AnimationStack *> &curAnimations = doc.AnimationStacks();
-    for (const AnimationStack *stack : curAnimations) {
-        ConvertAnimationStack(*stack);
-    }
-}
-
-std::string FBXConverter::FixNodeName(const std::string &name) {
-    // strip Model:: prefix, avoiding ambiguities (i.e. don't strip if
-    // this causes ambiguities, well possible between empty identifiers,
-    // such as "Model::" and ""). Make sure the behaviour is consistent
-    // across multiple calls to FixNodeName().
-    if (name.substr(0, 7) == "Model::") {
-        std::string temp = name.substr(7);
-        return temp;
-    }
-
-    return name;
-}
-
-std::string FBXConverter::FixAnimMeshName(const std::string &name) {
-    if (name.length()) {
-        size_t indexOf = name.find_first_of("::");
-        if (indexOf != std::string::npos && indexOf < name.size() - 2) {
-            return name.substr(indexOf + 2);
-        }
-    }
-    return name.length() ? name : "AnimMesh";
-}
-
-void FBXConverter::ConvertAnimationStack(const AnimationStack &st) {
-    const AnimationLayerList &layers = st.Layers();
-    if (layers.empty()) {
-        return;
-    }
-
-    aiAnimation *const anim = new aiAnimation();
-    animations.push_back(anim);
-
-    // strip AnimationStack:: prefix
-    std::string name = st.Name();
-    if (name.substr(0, 16) == "AnimationStack::") {
-        name = name.substr(16);
-    } else if (name.substr(0, 11) == "AnimStack::") {
-        name = name.substr(11);
-    }
-
-    anim->mName.Set(name);
-
-    // need to find all nodes for which we need to generate node animations -
-    // it may happen that we need to merge multiple layers, though.
-    NodeMap node_map;
-
-    // reverse mapping from curves to layers, much faster than querying
-    // the FBX DOM for it.
-    LayerMap layer_map;
-
-    const char *prop_whitelist[] = {
-        "Lcl Scaling",
-        "Lcl Rotation",
-        "Lcl Translation",
-        "DeformPercent"
-    };
-
-    std::map<std::string, morphAnimData *> morphAnimDatas;
-
-    for (const AnimationLayer *layer : layers) {
-        ai_assert(layer);
-        const AnimationCurveNodeList &nodes = layer->Nodes(prop_whitelist, 4);
-        for (const AnimationCurveNode *node : nodes) {
-            ai_assert(node);
-            const Model *const model = dynamic_cast<const Model *>(node->Target());
-            if (model) {
-                const std::string &curName = FixNodeName(model->Name());
-                node_map[curName].push_back(node);
-                layer_map[node] = layer;
-                continue;
-            }
-            const BlendShapeChannel *const bsc = dynamic_cast<const BlendShapeChannel *>(node->Target());
-            if (bsc) {
-                ProcessMorphAnimDatas(&morphAnimDatas, bsc, node);
-            }
-        }
-    }
-
-    // generate node animations
-    std::vector<aiNodeAnim *> node_anims;
-
-    double min_time = 1e10;
-    double max_time = -1e10;
-
-    int64_t start_time = st.LocalStart();
-    int64_t stop_time = st.LocalStop();
-    bool has_local_startstop = start_time != 0 || stop_time != 0;
-    if (!has_local_startstop) {
-        // no time range given, so accept every keyframe and use the actual min/max time
-        // the numbers are INT64_MIN/MAX, the 20000 is for safety because GenerateNodeAnimations uses an epsilon of 10000
-        start_time = -9223372036854775807ll + 20000;
-        stop_time = 9223372036854775807ll - 20000;
-    }
-
-    try {
-        for (const NodeMap::value_type &kv : node_map) {
-            GenerateNodeAnimations(node_anims,
-                    kv.first,
-                    kv.second,
-                    layer_map,
-                    start_time, stop_time,
-                    max_time,
-                    min_time);
-        }
-    } catch (std::exception &) {
-        std::for_each(node_anims.begin(), node_anims.end(), Util::delete_fun<aiNodeAnim>());
-        throw;
-    }
-
-    if (node_anims.size() || morphAnimDatas.size()) {
-        if (node_anims.size()) {
-            anim->mChannels = new aiNodeAnim *[node_anims.size()]();
-            anim->mNumChannels = static_cast<unsigned int>(node_anims.size());
-            std::swap_ranges(node_anims.begin(), node_anims.end(), anim->mChannels);
-        }
-        if (morphAnimDatas.size()) {
-            unsigned int numMorphMeshChannels = static_cast<unsigned int>(morphAnimDatas.size());
-            anim->mMorphMeshChannels = new aiMeshMorphAnim *[numMorphMeshChannels];
-            anim->mNumMorphMeshChannels = numMorphMeshChannels;
-            unsigned int i = 0;
-            for (const auto &morphAnimIt : morphAnimDatas) {
-                morphAnimData *animData = morphAnimIt.second;
-                unsigned int numKeys = static_cast<unsigned int>(animData->size());
-                aiMeshMorphAnim *meshMorphAnim = new aiMeshMorphAnim();
-                meshMorphAnim->mName.Set(morphAnimIt.first);
-                meshMorphAnim->mNumKeys = numKeys;
-                meshMorphAnim->mKeys = new aiMeshMorphKey[numKeys];
-                unsigned int j = 0;
-                for (auto animIt : *animData) {
-                    morphKeyData *keyData = animIt.second;
-                    unsigned int numValuesAndWeights = static_cast<unsigned int>(keyData->values.size());
-                    meshMorphAnim->mKeys[j].mNumValuesAndWeights = numValuesAndWeights;
-                    meshMorphAnim->mKeys[j].mValues = new unsigned int[numValuesAndWeights];
-                    meshMorphAnim->mKeys[j].mWeights = new double[numValuesAndWeights];
-                    meshMorphAnim->mKeys[j].mTime = CONVERT_FBX_TIME(animIt.first) * anim_fps;
-                    for (unsigned int k = 0; k < numValuesAndWeights; k++) {
-                        meshMorphAnim->mKeys[j].mValues[k] = keyData->values.at(k);
-                        meshMorphAnim->mKeys[j].mWeights[k] = keyData->weights.at(k);
-                    }
-                    j++;
-                }
-                anim->mMorphMeshChannels[i++] = meshMorphAnim;
-            }
-        }
-    } else {
-        // empty animations would fail validation, so drop them
-        delete anim;
-        animations.pop_back();
-        FBXImporter::LogInfo("ignoring empty AnimationStack (using IK?): ", name);
-        return;
-    }
-
-    double start_time_fps = has_local_startstop ? (CONVERT_FBX_TIME(start_time) * anim_fps) : min_time;
-    double stop_time_fps = has_local_startstop ? (CONVERT_FBX_TIME(stop_time) * anim_fps) : max_time;
-
-    // adjust relative timing for animation
-    for (unsigned int c = 0; c < anim->mNumChannels; c++) {
-        aiNodeAnim *channel = anim->mChannels[c];
-        for (uint32_t i = 0; i < channel->mNumPositionKeys; i++) {
-            channel->mPositionKeys[i].mTime -= start_time_fps;
-        }
-        for (uint32_t i = 0; i < channel->mNumRotationKeys; i++) {
-            channel->mRotationKeys[i].mTime -= start_time_fps;
-        }
-        for (uint32_t i = 0; i < channel->mNumScalingKeys; i++) {
-            channel->mScalingKeys[i].mTime -= start_time_fps;
-        }
-    }
-    for (unsigned int c = 0; c < anim->mNumMorphMeshChannels; c++) {
-        aiMeshMorphAnim *channel = anim->mMorphMeshChannels[c];
-        for (uint32_t i = 0; i < channel->mNumKeys; i++) {
-            channel->mKeys[i].mTime -= start_time_fps;
-        }
-    }
-
-    // for some mysterious reason, mDuration is simply the maximum key -- the
-    // validator always assumes animations to start at zero.
-    anim->mDuration = stop_time_fps - start_time_fps;
-    anim->mTicksPerSecond = anim_fps;
-}
-
-// ------------------------------------------------------------------------------------------------
-void FBXConverter::ProcessMorphAnimDatas(std::map<std::string, morphAnimData *> *morphAnimDatas, const BlendShapeChannel *bsc, const AnimationCurveNode *node) {
-    std::vector<const Connection *> bscConnections = doc.GetConnectionsBySourceSequenced(bsc->ID(), "Deformer");
-    for (const Connection *bscConnection : bscConnections) {
-        auto bs = dynamic_cast<const BlendShape *>(bscConnection->DestinationObject());
-        if (bs) {
-            auto channelIt = std::find(bs->BlendShapeChannels().begin(), bs->BlendShapeChannels().end(), bsc);
-            if (channelIt != bs->BlendShapeChannels().end()) {
-                auto channelIndex = static_cast<unsigned int>(std::distance(bs->BlendShapeChannels().begin(), channelIt));
-                std::vector<const Connection *> bsConnections = doc.GetConnectionsBySourceSequenced(bs->ID(), "Geometry");
-                for (const Connection *bsConnection : bsConnections) {
-                    auto geo = dynamic_cast<const Geometry *>(bsConnection->DestinationObject());
-                    if (geo) {
-                        std::vector<const Connection *> geoConnections = doc.GetConnectionsBySourceSequenced(geo->ID(), "Model");
-                        for (const Connection *geoConnection : geoConnections) {
-                            auto model = dynamic_cast<const Model *>(geoConnection->DestinationObject());
-                            if (model) {
-                                auto geoIt = std::find(model->GetGeometry().begin(), model->GetGeometry().end(), geo);
-                                auto geoIndex = static_cast<unsigned int>(std::distance(model->GetGeometry().begin(), geoIt));
-                                auto name = aiString(FixNodeName(model->Name() + "*"));
-                                name.length = 1 + ASSIMP_itoa10(name.data + name.length, MAXLEN - 1, geoIndex);
-                                morphAnimData *animData;
-                                auto animIt = morphAnimDatas->find(name.C_Str());
-                                if (animIt == morphAnimDatas->end()) {
-                                    animData = new morphAnimData();
-                                    morphAnimDatas->insert(std::make_pair(name.C_Str(), animData));
-                                } else {
-                                    animData = animIt->second;
-                                }
-                                for (std::pair<std::string, const AnimationCurve *> curvesIt : node->Curves()) {
-                                    if (curvesIt.first == "d|DeformPercent") {
-                                        const AnimationCurve *animationCurve = curvesIt.second;
-                                        const KeyTimeList &keys = animationCurve->GetKeys();
-                                        const KeyValueList &values = animationCurve->GetValues();
-                                        unsigned int k = 0;
-                                        for (auto key : keys) {
-                                            morphKeyData *keyData;
-                                            auto keyIt = animData->find(key);
-                                            if (keyIt == animData->end()) {
-                                                keyData = new morphKeyData();
-                                                animData->insert(std::make_pair(key, keyData));
-                                            } else {
-                                                keyData = keyIt->second;
-                                            }
-                                            keyData->values.push_back(channelIndex);
-                                            keyData->weights.push_back(values.at(k) / 100.0f);
-                                            k++;
-                                        }
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-#ifdef ASSIMP_BUILD_DEBUG
-// ------------------------------------------------------------------------------------------------
-// sanity check whether the input is ok
-static void validateAnimCurveNodes(const std::vector<const AnimationCurveNode *> &curves,
-        bool strictMode) {
-    const Object *target(nullptr);
-    for (const AnimationCurveNode *node : curves) {
-        if (!target) {
-            target = node->Target();
-        }
-        if (node->Target() != target) {
-            FBXImporter::LogWarn("Node target is nullptr type.");
-        }
-        if (strictMode) {
-            ai_assert(node->Target() == target);
-        }
-    }
-}
-#endif // ASSIMP_BUILD_DEBUG
-
-// ------------------------------------------------------------------------------------------------
-void FBXConverter::GenerateNodeAnimations(std::vector<aiNodeAnim *> &node_anims,
-        const std::string &fixed_name,
-        const std::vector<const AnimationCurveNode *> &curves,
-        const LayerMap &layer_map,
-        int64_t start, int64_t stop,
-        double &max_time,
-        double &min_time) {
-
-    NodeMap node_property_map;
-    ai_assert(curves.size());
-
-#ifdef ASSIMP_BUILD_DEBUG
-    validateAnimCurveNodes(curves, doc.Settings().strictMode);
-#endif
-    const AnimationCurveNode *curve_node = nullptr;
-    for (const AnimationCurveNode *node : curves) {
-        ai_assert(node);
-
-        if (node->TargetProperty().empty()) {
-            FBXImporter::LogWarn("target property for animation curve not set: ", node->Name());
-            continue;
-        }
-
-        curve_node = node;
-        if (node->Curves().empty()) {
-            FBXImporter::LogWarn("no animation curves assigned to AnimationCurveNode: ", node->Name());
-            continue;
-        }
-
-        node_property_map[node->TargetProperty()].push_back(node);
-    }
-
-    ai_assert(curve_node);
-    ai_assert(curve_node->TargetAsModel());
-
-    const Model &target = *curve_node->TargetAsModel();
-
-    // check for all possible transformation components
-    NodeMap::const_iterator chain[TransformationComp_MAXIMUM];
-
-    bool has_any = false;
-    bool has_complex = false;
-
-    for (size_t i = 0; i < TransformationComp_MAXIMUM; ++i) {
-        const TransformationComp comp = static_cast<TransformationComp>(i);
-
-        // inverse pivots don't exist in the input, we just generate them
-        if (comp == TransformationComp_RotationPivotInverse || comp == TransformationComp_ScalingPivotInverse) {
-            chain[i] = node_property_map.end();
-            continue;
-        }
-
-        chain[i] = node_property_map.find(NameTransformationCompProperty(comp));
-        if (chain[i] != node_property_map.end()) {
-
-            // check if this curves contains redundant information by looking
-            // up the corresponding node's transformation chain.
-            if (doc.Settings().optimizeEmptyAnimationCurves &&
-                    IsRedundantAnimationData(target, comp, (chain[i]->second))) {
-
-                FBXImporter::LogVerboseDebug("dropping redundant animation channel for node ", target.Name());
-                continue;
-            }
-
-            has_any = true;
-
-            if (comp != TransformationComp_Rotation && comp != TransformationComp_Scaling && comp != TransformationComp_Translation) {
-                has_complex = true;
-            }
-        }
-    }
-
-    if (!has_any) {
-        FBXImporter::LogWarn("ignoring node animation, did not find any transformation key frames");
-        return;
-    }
-
-    // this needs to play nicely with GenerateTransformationNodeChain() which will
-    // be invoked _later_ (animations come first). If this node has only rotation,
-    // scaling and translation _and_ there are no animated other components either,
-    // we can use a single node and also a single node animation channel.
-    if( !has_complex && !NeedsComplexTransformationChain(target)) {
-        aiNodeAnim* const nd = GenerateSimpleNodeAnim(fixed_name, target, chain,
-                node_property_map.end(),
-                start, stop,
-                max_time,
-                min_time
-        );
-
-        ai_assert(nd);
-        if (nd->mNumPositionKeys == 0 && nd->mNumRotationKeys == 0 && nd->mNumScalingKeys == 0) {
-            delete nd;
-        } else {
-            node_anims.push_back(nd);
-        }
-        return;
-    }
-
-    // otherwise, things get gruesome and we need separate animation channels
-    // for each part of the transformation chain. Remember which channels
-    // we generated and pass this information to the node conversion
-    // code to avoid nodes that have identity transform, but non-identity
-    // animations, being dropped.
-    unsigned int flags = 0, bit = 0x1;
-    for (size_t i = 0; i < TransformationComp_MAXIMUM; ++i, bit <<= 1) {
-        const TransformationComp comp = static_cast<TransformationComp>(i);
-
-        if (chain[i] != node_property_map.end()) {
-            flags |= bit;
-
-            ai_assert(comp != TransformationComp_RotationPivotInverse);
-            ai_assert(comp != TransformationComp_ScalingPivotInverse);
-
-            const std::string &chain_name = NameTransformationChainNode(fixed_name, comp);
-
-            aiNodeAnim *na = nullptr;
-            switch (comp) {
-                case TransformationComp_Rotation:
-                case TransformationComp_PreRotation:
-                case TransformationComp_PostRotation:
-                case TransformationComp_GeometricRotation:
-                    na = GenerateRotationNodeAnim(chain_name,
-                            target,
-                            (*chain[i]).second,
-                            layer_map,
-                            start, stop,
-                            max_time,
-                            min_time);
-
-                    break;
-
-                case TransformationComp_RotationOffset:
-                case TransformationComp_RotationPivot:
-                case TransformationComp_ScalingOffset:
-                case TransformationComp_ScalingPivot:
-                case TransformationComp_Translation:
-                case TransformationComp_GeometricTranslation:
-                    na = GenerateTranslationNodeAnim(chain_name,
-                            target,
-                            (*chain[i]).second,
-                            layer_map,
-                            start, stop,
-                            max_time,
-                            min_time);
-
-                    // pivoting requires us to generate an implicit inverse channel to undo the pivot translation
-                    if (comp == TransformationComp_RotationPivot) {
-                        const std::string &invName = NameTransformationChainNode(fixed_name,
-                                TransformationComp_RotationPivotInverse);
-
-                        aiNodeAnim *const inv = GenerateTranslationNodeAnim(invName,
-                                target,
-                                (*chain[i]).second,
-                                layer_map,
-                                start, stop,
-                                max_time,
-                                min_time,
-                                true);
-
-                        ai_assert(inv);
-                        if (inv->mNumPositionKeys == 0 && inv->mNumRotationKeys == 0 && inv->mNumScalingKeys == 0) {
-                            delete inv;
-                        } else {
-                            node_anims.push_back(inv);
-                        }
-
-                        ai_assert(TransformationComp_RotationPivotInverse > i);
-                        flags |= bit << (TransformationComp_RotationPivotInverse - i);
-                    } else if (comp == TransformationComp_ScalingPivot) {
-                        const std::string &invName = NameTransformationChainNode(fixed_name,
-                                TransformationComp_ScalingPivotInverse);
-
-                        aiNodeAnim *const inv = GenerateTranslationNodeAnim(invName,
-                                target,
-                                (*chain[i]).second,
-                                layer_map,
-                                start, stop,
-                                max_time,
-                                min_time,
-                                true);
-
-                        ai_assert(inv);
-                        if (inv->mNumPositionKeys == 0 && inv->mNumRotationKeys == 0 && inv->mNumScalingKeys == 0) {
-                            delete inv;
-                        } else {
-                            node_anims.push_back(inv);
-                        }
-
-                        ai_assert(TransformationComp_RotationPivotInverse > i);
-                        flags |= bit << (TransformationComp_RotationPivotInverse - i);
-                    }
-
-                    break;
-
-                case TransformationComp_Scaling:
-                case TransformationComp_GeometricScaling:
-                    na = GenerateScalingNodeAnim(chain_name,
-                            target,
-                            (*chain[i]).second,
-                            layer_map,
-                            start, stop,
-                            max_time,
-                            min_time);
-
-                    break;
-
-                default:
-                    ai_assert(false);
-            }
-
-            ai_assert(na);
-            if (na->mNumPositionKeys == 0 && na->mNumRotationKeys == 0 && na->mNumScalingKeys == 0) {
-                delete na;
-            } else {
-                node_anims.push_back(na);
-            }
-            continue;
-        }
-    }
-
-    node_anim_chain_bits[fixed_name] = flags;
-}
-
-bool FBXConverter::IsRedundantAnimationData(const Model &target,
-        TransformationComp comp,
-        const std::vector<const AnimationCurveNode *> &curves) {
-    ai_assert(curves.size());
-
-    // look for animation nodes with
-    //  * sub channels for all relevant components set
-    //  * one key/value pair per component
-    //  * combined values match up the corresponding value in the bind pose node transformation
-    // only such nodes are 'redundant' for this function.
-
-    if (curves.size() > 1) {
-        return false;
-    }
-
-    const AnimationCurveNode &nd = *curves.front();
-    const AnimationCurveMap &sub_curves = nd.Curves();
-
-    const AnimationCurveMap::const_iterator dx = sub_curves.find("d|X");
-    const AnimationCurveMap::const_iterator dy = sub_curves.find("d|Y");
-    const AnimationCurveMap::const_iterator dz = sub_curves.find("d|Z");
-
-    if (dx == sub_curves.end() || dy == sub_curves.end() || dz == sub_curves.end()) {
-        return false;
-    }
-
-    const KeyValueList &vx = (*dx).second->GetValues();
-    const KeyValueList &vy = (*dy).second->GetValues();
-    const KeyValueList &vz = (*dz).second->GetValues();
-
-    if (vx.size() != 1 || vy.size() != 1 || vz.size() != 1) {
-        return false;
-    }
-
-    const aiVector3D dyn_val = aiVector3D(vx[0], vy[0], vz[0]);
-    const aiVector3D &static_val = PropertyGet<aiVector3D>(target.Props(),
-            NameTransformationCompProperty(comp),
-            TransformationCompDefaultValue(comp));
-
-    const float epsilon = Math::getEpsilon<float>();
-    return (dyn_val - static_val).SquareLength() < epsilon;
-}
-
-aiNodeAnim *FBXConverter::GenerateRotationNodeAnim(const std::string &name,
-        const Model &target,
-        const std::vector<const AnimationCurveNode *> &curves,
-        const LayerMap &layer_map,
-        int64_t start, int64_t stop,
-        double &max_time,
-        double &min_time) {
-    std::unique_ptr<aiNodeAnim> na(new aiNodeAnim());
-    na->mNodeName.Set(name);
-
-    ConvertRotationKeys(na.get(), curves, layer_map, start, stop, max_time, min_time, target.RotationOrder());
-
-    // dummy scaling key
-    na->mScalingKeys = new aiVectorKey[1];
-    na->mNumScalingKeys = 1;
-
-    na->mScalingKeys[0].mTime = 0.;
-    na->mScalingKeys[0].mValue = aiVector3D(1.0f, 1.0f, 1.0f);
-
-    // dummy position key
-    na->mPositionKeys = new aiVectorKey[1];
-    na->mNumPositionKeys = 1;
-
-    na->mPositionKeys[0].mTime = 0.;
-    na->mPositionKeys[0].mValue = aiVector3D();
-
-    return na.release();
-}
-
-aiNodeAnim *FBXConverter::GenerateScalingNodeAnim(const std::string &name,
-        const Model & /*target*/,
-        const std::vector<const AnimationCurveNode *> &curves,
-        const LayerMap &layer_map,
-        int64_t start, int64_t stop,
-        double &max_time,
-        double &min_time) {
-    std::unique_ptr<aiNodeAnim> na(new aiNodeAnim());
-    na->mNodeName.Set(name);
-
-    ConvertScaleKeys(na.get(), curves, layer_map, start, stop, max_time, min_time);
-
-    // dummy rotation key
-    na->mRotationKeys = new aiQuatKey[1];
-    na->mNumRotationKeys = 1;
-
-    na->mRotationKeys[0].mTime = 0.;
-    na->mRotationKeys[0].mValue = aiQuaternion();
-
-    // dummy position key
-    na->mPositionKeys = new aiVectorKey[1];
-    na->mNumPositionKeys = 1;
-
-    na->mPositionKeys[0].mTime = 0.;
-    na->mPositionKeys[0].mValue = aiVector3D();
-
-    return na.release();
-}
-
-aiNodeAnim *FBXConverter::GenerateTranslationNodeAnim(const std::string &name,
-        const Model & /*target*/,
-        const std::vector<const AnimationCurveNode *> &curves,
-        const LayerMap &layer_map,
-        int64_t start, int64_t stop,
-        double &max_time,
-        double &min_time,
-        bool inverse) {
-    std::unique_ptr<aiNodeAnim> na(new aiNodeAnim());
-    na->mNodeName.Set(name);
-
-    ConvertTranslationKeys(na.get(), curves, layer_map, start, stop, max_time, min_time);
-
-    if (inverse) {
-        for (unsigned int i = 0; i < na->mNumPositionKeys; ++i) {
-            na->mPositionKeys[i].mValue *= -1.0f;
-        }
-    }
-
-    // dummy scaling key
-    na->mScalingKeys = new aiVectorKey[1];
-    na->mNumScalingKeys = 1;
-
-    na->mScalingKeys[0].mTime = 0.;
-    na->mScalingKeys[0].mValue = aiVector3D(1.0f, 1.0f, 1.0f);
-
-    // dummy rotation key
-    na->mRotationKeys = new aiQuatKey[1];
-    na->mNumRotationKeys = 1;
-
-    na->mRotationKeys[0].mTime = 0.;
-    na->mRotationKeys[0].mValue = aiQuaternion();
-
-    return na.release();
-}
-
-aiNodeAnim* FBXConverter::GenerateSimpleNodeAnim(const std::string& name,
-        const Model& target,
-        NodeMap::const_iterator chain[TransformationComp_MAXIMUM],
-        NodeMap::const_iterator iterEnd,
-        int64_t start, int64_t stop,
-        double& maxTime,
-        double& minTime)
-{
-    std::unique_ptr<aiNodeAnim> na(new aiNodeAnim());
-    na->mNodeName.Set(name);
-
-    const PropertyTable &props = target.Props();
-
-    // collect unique times and keyframe lists
-    KeyFrameListList keyframeLists[TransformationComp_MAXIMUM];
-    KeyTimeList keytimes;
-
-    for (size_t i = 0; i < TransformationComp_MAXIMUM; ++i) {
-        if (chain[i] == iterEnd)
-            continue;
-
-        if (i == TransformationComp_Rotation || i == TransformationComp_PreRotation
-                || i == TransformationComp_PostRotation || i == TransformationComp_GeometricRotation) {
-            keyframeLists[i] = GetRotationKeyframeList((*chain[i]).second, start, stop);
-        } else {
-            keyframeLists[i] = GetKeyframeList((*chain[i]).second, start, stop);
-        }
-
-        for (KeyFrameListList::const_iterator it = keyframeLists[i].begin(); it != keyframeLists[i].end(); ++it) {
-            const KeyTimeList& times = *std::get<0>(*it);
-            keytimes.insert(keytimes.end(), times.begin(), times.end());
-        }
-
-        // remove duplicates
-        std::sort(keytimes.begin(), keytimes.end());
-
-        auto last = std::unique(keytimes.begin(), keytimes.end());
-        keytimes.erase(last, keytimes.end());
-    }
-
-    const Model::RotOrder rotOrder = target.RotationOrder();
-    const size_t keyCount = keytimes.size();
-
-    aiVector3D defTranslate = PropertyGet(props, "Lcl Translation", aiVector3D(0.f, 0.f, 0.f));
-    aiVector3D defRotation = PropertyGet(props, "Lcl Rotation", aiVector3D(0.f, 0.f, 0.f));
-    aiVector3D defScale = PropertyGet(props, "Lcl Scaling", aiVector3D(1.f, 1.f, 1.f));
-    aiQuaternion defQuat = EulerToQuaternion(defRotation, rotOrder);
-
-    aiVectorKey* outTranslations = new aiVectorKey[keyCount];
-    aiQuatKey* outRotations = new aiQuatKey[keyCount];
-    aiVectorKey* outScales = new aiVectorKey[keyCount];
-
-    if (keyframeLists[TransformationComp_Translation].size() > 0) {
-        InterpolateKeys(outTranslations, keytimes, keyframeLists[TransformationComp_Translation], defTranslate, maxTime, minTime);
-    } else {
-        for (size_t i = 0; i < keyCount; ++i) {
-            outTranslations[i].mTime = CONVERT_FBX_TIME(keytimes[i]) * anim_fps;
-            outTranslations[i].mValue = defTranslate;
-        }
-    }
-
-    if (keyframeLists[TransformationComp_Rotation].size() > 0) {
-        InterpolateKeys(outRotations, keytimes, keyframeLists[TransformationComp_Rotation], defRotation, maxTime, minTime, rotOrder);
-    } else {
-        for (size_t i = 0; i < keyCount; ++i) {
-            outRotations[i].mTime = CONVERT_FBX_TIME(keytimes[i]) * anim_fps;
-            outRotations[i].mValue = defQuat;
-        }
-    }
-
-    if (keyframeLists[TransformationComp_Scaling].size() > 0) {
-        InterpolateKeys(outScales, keytimes, keyframeLists[TransformationComp_Scaling], defScale, maxTime, minTime);
-    } else {
-        for (size_t i = 0; i < keyCount; ++i) {
-            outScales[i].mTime = CONVERT_FBX_TIME(keytimes[i]) * anim_fps;
-            outScales[i].mValue = defScale;
-        }
-    }
-
-    bool ok = false;
-    
-    const float zero_epsilon = ai_epsilon;
-
-    const aiVector3D& preRotation = PropertyGet<aiVector3D>(props, "PreRotation", ok);
-    if (ok && preRotation.SquareLength() > zero_epsilon) {
-        const aiQuaternion preQuat = EulerToQuaternion(preRotation, Model::RotOrder_EulerXYZ);
-        for (size_t i = 0; i < keyCount; ++i) {
-            outRotations[i].mValue = preQuat * outRotations[i].mValue;
-        }
-    }
-
-    const aiVector3D& postRotation = PropertyGet<aiVector3D>(props, "PostRotation", ok);
-    if (ok && postRotation.SquareLength() > zero_epsilon) {
-        const aiQuaternion postQuat = EulerToQuaternion(postRotation, Model::RotOrder_EulerXYZ);
-        for (size_t i = 0; i < keyCount; ++i) {
-            outRotations[i].mValue = outRotations[i].mValue * postQuat;
-        }
-    }
-
-    // convert TRS to SRT
-    for (size_t i = 0; i < keyCount; ++i) {
-        aiQuaternion& r = outRotations[i].mValue;
-        aiVector3D& s = outScales[i].mValue;
-        aiVector3D& t = outTranslations[i].mValue;
-
-        aiMatrix4x4 mat, temp;
-        aiMatrix4x4::Translation(t, mat);
-        mat *= aiMatrix4x4(r.GetMatrix());
-        mat *= aiMatrix4x4::Scaling(s, temp);
-
-        mat.Decompose(s, r, t);
-    }
-
-    na->mNumScalingKeys = static_cast<unsigned int>(keyCount);
-    na->mNumRotationKeys = na->mNumScalingKeys;
-    na->mNumPositionKeys = na->mNumScalingKeys;
-
-    na->mScalingKeys = outScales;
-    na->mRotationKeys = outRotations;
-    na->mPositionKeys = outTranslations;
-
-    return na.release();
-}
-
-FBXConverter::KeyFrameListList FBXConverter::GetKeyframeList(const std::vector<const AnimationCurveNode *> &nodes, int64_t start, int64_t stop) {
-    KeyFrameListList inputs;
-    inputs.reserve(nodes.size() * 3);
-
-    //give some breathing room for rounding errors
-    int64_t adj_start = start - 10000;
-    int64_t adj_stop = stop + 10000;
-
-    for (const AnimationCurveNode *node : nodes) {
-        ai_assert(node);
-
-        const AnimationCurveMap &curves = node->Curves();
-        for (const AnimationCurveMap::value_type &kv : curves) {
-
-            unsigned int mapto;
-            if (kv.first == "d|X") {
-                mapto = 0;
-            } else if (kv.first == "d|Y") {
-                mapto = 1;
-            } else if (kv.first == "d|Z") {
-                mapto = 2;
-            } else {
-                FBXImporter::LogWarn("ignoring scale animation curve, did not recognize target component");
-                continue;
-            }
-
-            const AnimationCurve *const curve = kv.second;
-            ai_assert(curve->GetKeys().size() == curve->GetValues().size());
-            ai_assert(curve->GetKeys().size());
-
-            //get values within the start/stop time window
-            std::shared_ptr<KeyTimeList> Keys(new KeyTimeList());
-            std::shared_ptr<KeyValueList> Values(new KeyValueList());
-            const size_t count = curve->GetKeys().size();
-            Keys->reserve(count);
-            Values->reserve(count);
-            for (size_t n = 0; n < count; n++) {
-                int64_t k = curve->GetKeys().at(n);
-                if (k >= adj_start && k <= adj_stop) {
-                    Keys->push_back(k);
-                    Values->push_back(curve->GetValues().at(n));
-                }
-            }
-
-            inputs.push_back(std::make_tuple(Keys, Values, mapto));
-        }
-    }
-    return inputs; // pray for NRVO :-)
-}
-
-FBXConverter::KeyFrameListList FBXConverter::GetRotationKeyframeList(const std::vector<const AnimationCurveNode *> &nodes,
-                                                                     int64_t start, int64_t stop) {
-    KeyFrameListList inputs;
-    inputs.reserve(nodes.size() * 3);
-
-    //give some breathing room for rounding errors
-    const int64_t adj_start = start - 10000;
-    const int64_t adj_stop = stop + 10000;
-
-    for (const AnimationCurveNode *node : nodes) {
-        ai_assert(node);
-
-        const AnimationCurveMap &curves = node->Curves();
-        for (const AnimationCurveMap::value_type &kv : curves) {
-
-            unsigned int mapto;
-            if (kv.first == "d|X") {
-                mapto = 0;
-            } else if (kv.first == "d|Y") {
-                mapto = 1;
-            } else if (kv.first == "d|Z") {
-                mapto = 2;
-            } else {
-                FBXImporter::LogWarn("ignoring scale animation curve, did not recognize target component");
-                continue;
-            }
-
-            const AnimationCurve *const curve = kv.second;
-            ai_assert(curve->GetKeys().size() == curve->GetValues().size());
-            ai_assert(curve->GetKeys().size());
-
-            //get values within the start/stop time window
-            std::shared_ptr<KeyTimeList> Keys(new KeyTimeList());
-            std::shared_ptr<KeyValueList> Values(new KeyValueList());
-            const size_t count = curve->GetKeys().size();
-
-            int64_t tp = curve->GetKeys().at(0);
-            float vp = curve->GetValues().at(0);
-            Keys->push_back(tp);
-            Values->push_back(vp);
-            if (count > 1) {
-                int64_t tc = curve->GetKeys().at(1);
-                float vc = curve->GetValues().at(1);
-                for (size_t n = 1; n < count; n++) {
-                    while (std::abs(vc - vp) >= 180.0f) {
-                        float step = std::floor(float(tc - tp) / (vc - vp) * 179.0f);
-                        int64_t tnew = tp + int64_t(step);
-                        float vnew = vp + (vc - vp) * step / float(tc - tp);
-                        if (tnew >= adj_start && tnew <= adj_stop) {
-                            Keys->push_back(tnew);
-                            Values->push_back(vnew);
-                        }
-                        tp = tnew;
-                        vp = vnew;
-                    }
-                    if (tc >= adj_start && tc <= adj_stop) {
-                        Keys->push_back(tc);
-                        Values->push_back(vc);
-                    }
-                    if (n + 1 < count) {
-                        tp = tc;
-                        vp = vc;
-                        tc = curve->GetKeys().at(n + 1);
-                        vc = curve->GetValues().at(n + 1);
-                    }
-                }
-            }
-            inputs.push_back(std::make_tuple(Keys, Values, mapto));
-        }
-    }
-    return inputs;
-}
-
-KeyTimeList FBXConverter::GetKeyTimeList(const KeyFrameListList &inputs) {
-    ai_assert(!inputs.empty());
-
-    // reserve some space upfront - it is likely that the key-frame lists
-    // have matching time values, so max(of all key-frame lists) should
-    // be a good estimate.
-    KeyTimeList keys;
-
-    size_t estimate = 0;
-    for (const KeyFrameList &kfl : inputs) {
-        estimate = std::max(estimate, std::get<0>(kfl)->size());
-    }
-
-    keys.reserve(estimate);
-
-    std::vector<unsigned int> next_pos;
-    next_pos.resize(inputs.size(), 0);
-
-    const size_t count = inputs.size();
-    while (true) {
-
-        int64_t min_tick = std::numeric_limits<int64_t>::max();
-        for (size_t i = 0; i < count; ++i) {
-            const KeyFrameList &kfl = inputs[i];
-
-            if (std::get<0>(kfl)->size() > next_pos[i] && std::get<0>(kfl)->at(next_pos[i]) < min_tick) {
-                min_tick = std::get<0>(kfl)->at(next_pos[i]);
-            }
-        }
-
-        if (min_tick == std::numeric_limits<int64_t>::max()) {
-            break;
-        }
-        keys.push_back(min_tick);
-
-        for (size_t i = 0; i < count; ++i) {
-            const KeyFrameList &kfl = inputs[i];
-
-            while (std::get<0>(kfl)->size() > next_pos[i] && std::get<0>(kfl)->at(next_pos[i]) == min_tick) {
-                ++next_pos[i];
-            }
-        }
-    }
-
-    return keys;
-}
-
-void FBXConverter::InterpolateKeys(aiVectorKey *valOut, const KeyTimeList &keys, const KeyFrameListList &inputs,
-        const aiVector3D &def_value,
-        double &max_time,
-        double &min_time) {
-    ai_assert(!keys.empty());
-    ai_assert(nullptr != valOut);
-
-    std::vector<unsigned int> next_pos;
-    const size_t count(inputs.size());
-
-    next_pos.resize(inputs.size(), 0);
-
-    for (KeyTimeList::value_type time : keys) {
-        ai_real result[3] = { def_value.x, def_value.y, def_value.z };
-
-        for (size_t i = 0; i < count; ++i) {
-            const KeyFrameList &kfl = inputs[i];
-
-            const size_t ksize = std::get<0>(kfl)->size();
-            if (ksize == 0) {
-                continue;
-            }
-            if (ksize > next_pos[i] && std::get<0>(kfl)->at(next_pos[i]) == time) {
-                ++next_pos[i];
-            }
-
-            const size_t id0 = next_pos[i] > 0 ? next_pos[i] - 1 : 0;
-            const size_t id1 = next_pos[i] == ksize ? ksize - 1 : next_pos[i];
-
-            // use lerp for interpolation
-            const KeyValueList::value_type valueA = std::get<1>(kfl)->at(id0);
-            const KeyValueList::value_type valueB = std::get<1>(kfl)->at(id1);
-
-            const KeyTimeList::value_type timeA = std::get<0>(kfl)->at(id0);
-            const KeyTimeList::value_type timeB = std::get<0>(kfl)->at(id1);
-
-            const ai_real factor = timeB == timeA ? ai_real(0.) : static_cast<ai_real>((time - timeA)) / (timeB - timeA);
-            const ai_real interpValue = static_cast<ai_real>(valueA + (valueB - valueA) * factor);
-
-            result[std::get<2>(kfl)] = interpValue;
-        }
-
-        // magic value to convert fbx times to seconds
-        valOut->mTime = CONVERT_FBX_TIME(time) * anim_fps;
-
-        min_time = std::min(min_time, valOut->mTime);
-        max_time = std::max(max_time, valOut->mTime);
-
-        valOut->mValue.x = result[0];
-        valOut->mValue.y = result[1];
-        valOut->mValue.z = result[2];
-
-        ++valOut;
-    }
-}
-
-void FBXConverter::InterpolateKeys(aiQuatKey *valOut, const KeyTimeList &keys, const KeyFrameListList &inputs,
-        const aiVector3D &def_value,
-        double &maxTime,
-        double &minTime,
-        Model::RotOrder order) {
-    ai_assert(!keys.empty());
-    ai_assert(nullptr != valOut);
-
-    std::unique_ptr<aiVectorKey[]> temp(new aiVectorKey[keys.size()]);
-    InterpolateKeys(temp.get(), keys, inputs, def_value, maxTime, minTime);
-
-    aiMatrix4x4 m;
-
-    aiQuaternion lastq;
-
-    for (size_t i = 0, c = keys.size(); i < c; ++i) {
-
-        valOut[i].mTime = temp[i].mTime;
-
-        GetRotationMatrix(order, temp[i].mValue, m);
-        aiQuaternion quat = aiQuaternion(aiMatrix3x3(m));
-
-        // take shortest path by checking the inner product
-        // http://www.3dkingdoms.com/weekly/weekly.php?a=36
-        if (quat.x * lastq.x + quat.y * lastq.y + quat.z * lastq.z + quat.w * lastq.w < 0) {
-            quat.Conjugate();
-            quat.w = -quat.w;
-        }
-        lastq = quat;
-
-        valOut[i].mValue = quat;
-    }
-}
-
-aiQuaternion FBXConverter::EulerToQuaternion(const aiVector3D &rot, Model::RotOrder order) {
-    aiMatrix4x4 m;
-    GetRotationMatrix(order, rot, m);
-
-    return aiQuaternion(aiMatrix3x3(m));
-}
-
-void FBXConverter::ConvertScaleKeys(aiNodeAnim *na, const std::vector<const AnimationCurveNode *> &nodes, const LayerMap & /*layers*/,
-        int64_t start, int64_t stop,
-        double &maxTime,
-        double &minTime) {
-    ai_assert(nodes.size());
-
-    // XXX for now, assume scale should be blended geometrically (i.e. two
-    // layers should be multiplied with each other). There is a FBX
-    // property in the layer to specify the behaviour, though.
-
-    const KeyFrameListList &inputs = GetKeyframeList(nodes, start, stop);
-    const KeyTimeList &keys = GetKeyTimeList(inputs);
-
-    na->mNumScalingKeys = static_cast<unsigned int>(keys.size());
-    na->mScalingKeys = new aiVectorKey[keys.size()];
-    if (keys.size() > 0) {
-        InterpolateKeys(na->mScalingKeys, keys, inputs, aiVector3D(1.0f, 1.0f, 1.0f), maxTime, minTime);
-    }
-}
-
-void FBXConverter::ConvertTranslationKeys(aiNodeAnim *na, const std::vector<const AnimationCurveNode *> &nodes,
-        const LayerMap & /*layers*/,
-        int64_t start, int64_t stop,
-        double &maxTime,
-        double &minTime) {
-    ai_assert(nodes.size());
-
-    // XXX see notes in ConvertScaleKeys()
-    const KeyFrameListList &inputs = GetKeyframeList(nodes, start, stop);
-    const KeyTimeList &keys = GetKeyTimeList(inputs);
-
-    na->mNumPositionKeys = static_cast<unsigned int>(keys.size());
-    na->mPositionKeys = new aiVectorKey[keys.size()];
-    if (keys.size() > 0)
-        InterpolateKeys(na->mPositionKeys, keys, inputs, aiVector3D(0.0f, 0.0f, 0.0f), maxTime, minTime);
-}
-
-void FBXConverter::ConvertRotationKeys(aiNodeAnim *na, const std::vector<const AnimationCurveNode *> &nodes,
-        const LayerMap & /*layers*/,
-        int64_t start, int64_t stop,
-        double &maxTime,
-        double &minTime,
-        Model::RotOrder order) {
-    ai_assert(nodes.size());
-
-    // XXX see notes in ConvertScaleKeys()
-    const std::vector<KeyFrameList> &inputs = GetRotationKeyframeList(nodes, start, stop);
-    const KeyTimeList &keys = GetKeyTimeList(inputs);
-
-    na->mNumRotationKeys = static_cast<unsigned int>(keys.size());
-    na->mRotationKeys = new aiQuatKey[keys.size()];
-    if (!keys.empty()) {
-        InterpolateKeys(na->mRotationKeys, keys, inputs, aiVector3D(0.0f, 0.0f, 0.0f), maxTime, minTime, order);
-    }
-}
-
-void FBXConverter::ConvertGlobalSettings() {
-    if (nullptr == mSceneOut) {
-        return;
-    }
-
-    const bool hasGenerator = !doc.Creator().empty();
-
-    mSceneOut->mMetaData = aiMetadata::Alloc(16 + (hasGenerator ? 1 : 0));
-    mSceneOut->mMetaData->Set(0, "UpAxis", doc.GlobalSettings().UpAxis());
-    mSceneOut->mMetaData->Set(1, "UpAxisSign", doc.GlobalSettings().UpAxisSign());
-    mSceneOut->mMetaData->Set(2, "FrontAxis", doc.GlobalSettings().FrontAxis());
-    mSceneOut->mMetaData->Set(3, "FrontAxisSign", doc.GlobalSettings().FrontAxisSign());
-    mSceneOut->mMetaData->Set(4, "CoordAxis", doc.GlobalSettings().CoordAxis());
-    mSceneOut->mMetaData->Set(5, "CoordAxisSign", doc.GlobalSettings().CoordAxisSign());
-    mSceneOut->mMetaData->Set(6, "OriginalUpAxis", doc.GlobalSettings().OriginalUpAxis());
-    mSceneOut->mMetaData->Set(7, "OriginalUpAxisSign", doc.GlobalSettings().OriginalUpAxisSign());
-    //const double unitScaleFactor = (double)doc.GlobalSettings().UnitScaleFactor();
-    mSceneOut->mMetaData->Set(8, "UnitScaleFactor", doc.GlobalSettings().UnitScaleFactor());
-    mSceneOut->mMetaData->Set(9, "OriginalUnitScaleFactor", doc.GlobalSettings().OriginalUnitScaleFactor());
-    mSceneOut->mMetaData->Set(10, "AmbientColor", doc.GlobalSettings().AmbientColor());
-    mSceneOut->mMetaData->Set(11, "FrameRate", (int)doc.GlobalSettings().TimeMode());
-    mSceneOut->mMetaData->Set(12, "TimeSpanStart", doc.GlobalSettings().TimeSpanStart());
-    mSceneOut->mMetaData->Set(13, "TimeSpanStop", doc.GlobalSettings().TimeSpanStop());
-    mSceneOut->mMetaData->Set(14, "CustomFrameRate", doc.GlobalSettings().CustomFrameRate());
-    mSceneOut->mMetaData->Set(15, AI_METADATA_SOURCE_FORMAT_VERSION, aiString(ai_to_string(doc.FBXVersion())));
-    if (hasGenerator) {
-        mSceneOut->mMetaData->Set(16, AI_METADATA_SOURCE_GENERATOR, aiString(doc.Creator()));
-    }
-}
-
-void FBXConverter::TransferDataToScene() {
-    ai_assert(!mSceneOut->mMeshes);
-    ai_assert(!mSceneOut->mNumMeshes);
-
-    // note: the trailing () ensures initialization with nullptr - not
-    // many C++ users seem to know this, so pointing it out to avoid
-    // confusion why this code works.
-
-    if (!mMeshes.empty()) {
-        mSceneOut->mMeshes = new aiMesh *[mMeshes.size()]();
-        mSceneOut->mNumMeshes = static_cast<unsigned int>(mMeshes.size());
-
-        std::swap_ranges(mMeshes.begin(), mMeshes.end(), mSceneOut->mMeshes);
-    }
-
-    if (!materials.empty()) {
-        mSceneOut->mMaterials = new aiMaterial *[materials.size()]();
-        mSceneOut->mNumMaterials = static_cast<unsigned int>(materials.size());
-
-        std::swap_ranges(materials.begin(), materials.end(), mSceneOut->mMaterials);
-    }
-
-    if (!animations.empty()) {
-        mSceneOut->mAnimations = new aiAnimation *[animations.size()]();
-        mSceneOut->mNumAnimations = static_cast<unsigned int>(animations.size());
-
-        std::swap_ranges(animations.begin(), animations.end(), mSceneOut->mAnimations);
-    }
-
-    if (!lights.empty()) {
-        mSceneOut->mLights = new aiLight *[lights.size()]();
-        mSceneOut->mNumLights = static_cast<unsigned int>(lights.size());
-
-        std::swap_ranges(lights.begin(), lights.end(), mSceneOut->mLights);
-    }
-
-    if (!cameras.empty()) {
-        mSceneOut->mCameras = new aiCamera *[cameras.size()]();
-        mSceneOut->mNumCameras = static_cast<unsigned int>(cameras.size());
-
-        std::swap_ranges(cameras.begin(), cameras.end(), mSceneOut->mCameras);
-    }
-
-    if (!textures.empty()) {
-        mSceneOut->mTextures = new aiTexture *[textures.size()]();
-        mSceneOut->mNumTextures = static_cast<unsigned int>(textures.size());
-
-        std::swap_ranges(textures.begin(), textures.end(), mSceneOut->mTextures);
-    }
-}
-
-void FBXConverter::ConvertOrphanedEmbeddedTextures() {
-    // in C++14 it could be:
-    // for (auto&& [id, object] : objects)
-    for (auto &&id_and_object : doc.Objects()) {
-        auto &&id = std::get<0>(id_and_object);
-        auto &&object = std::get<1>(id_and_object);
-        // If an object doesn't have parent
-        if (doc.ConnectionsBySource().count(id) == 0) {
-            const Texture *realTexture = nullptr;
-            try {
-                const auto &element = object->GetElement();
-                const Token &key = element.KeyToken();
-                const char *obtype = key.begin();
-                const size_t length = static_cast<size_t>(key.end() - key.begin());
-                if (strncmp(obtype, "Texture", length) == 0) {
-                    if (const Texture *texture = static_cast<const Texture *>(object->Get())) {
-                        if (texture->Media() && texture->Media()->ContentLength() > 0) {
-                            realTexture = texture;
-                        }
-                    }
-                }
-            } catch (...) {
-                // do nothing
-            }
-            if (realTexture) {
-                const Video *media = realTexture->Media();
-                unsigned int index = ConvertVideo(*media);
-                textures_converted[media] = index;
-            }
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void ConvertToAssimpScene(aiScene *out, const Document &doc, bool removeEmptyBones) {
-    FBXConverter converter(out, doc, removeEmptyBones);
-}
-
-} // namespace FBX
-} // namespace Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXConverter.h b/libs/assimp/code/AssetLib/FBX/FBXConverter.h
deleted file mode 100644
index becfdb3..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXConverter.h
+++ /dev/null
@@ -1,476 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXDConverter.h
- *  @brief FBX DOM to aiScene conversion
- */
-#ifndef INCLUDED_AI_FBX_CONVERTER_H
-#define INCLUDED_AI_FBX_CONVERTER_H
-
-#include "FBXParser.h"
-#include "FBXMeshGeometry.h"
-#include "FBXDocument.h"
-#include "FBXUtil.h"
-#include "FBXProperties.h"
-#include "FBXImporter.h"
-
-#include <assimp/anim.h>
-#include <assimp/material.h>
-#include <assimp/light.h>
-#include <assimp/texture.h>
-#include <assimp/camera.h>
-#include <assimp/StringComparison.h>
-#include <unordered_map>
-#include <unordered_set>
-
-struct aiScene;
-struct aiNode;
-struct aiMaterial;
-
-struct morphKeyData {
-    std::vector<unsigned int> values;
-    std::vector<float> weights;
-};
-typedef std::map<int64_t, morphKeyData*> morphAnimData;
-
-namespace Assimp {
-namespace FBX {
-
-class Document;
-/**
- *  Convert a FBX #Document to #aiScene
- *  @param out Empty scene to be populated
- *  @param doc Parsed FBX document
- *  @param removeEmptyBones Will remove bones, which do not have any references to vertices.
- */
-void ConvertToAssimpScene(aiScene* out, const Document& doc, bool removeEmptyBones);
-
-/** Dummy class to encapsulate the conversion process */
-class FBXConverter {
-public:
-    /**
-    *  The different parts that make up the final local transformation of a fbx-node
-    */
-    enum TransformationComp {
-        TransformationComp_GeometricScalingInverse = 0,
-        TransformationComp_GeometricRotationInverse,
-        TransformationComp_GeometricTranslationInverse,
-        TransformationComp_Translation,
-        TransformationComp_RotationOffset,
-        TransformationComp_RotationPivot,
-        TransformationComp_PreRotation,
-        TransformationComp_Rotation,
-        TransformationComp_PostRotation,
-        TransformationComp_RotationPivotInverse,
-        TransformationComp_ScalingOffset,
-        TransformationComp_ScalingPivot,
-        TransformationComp_Scaling,
-        TransformationComp_ScalingPivotInverse,
-        TransformationComp_GeometricTranslation,
-        TransformationComp_GeometricRotation,
-        TransformationComp_GeometricScaling,
-
-        TransformationComp_MAXIMUM
-    };
-
-public:
-    FBXConverter(aiScene* out, const Document& doc, bool removeEmptyBones);
-    ~FBXConverter();
-
-private:
-    // ------------------------------------------------------------------------------------------------
-    // find scene root and trigger recursive scene conversion
-    void ConvertRootNode();
-
-    // ------------------------------------------------------------------------------------------------
-    // collect and assign child nodes
-    void ConvertNodes(uint64_t id, aiNode *parent, aiNode *root_node);
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertLights(const Model& model, const std::string &orig_name );
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertCameras(const Model& model, const std::string &orig_name );
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertLight( const Light& light, const std::string &orig_name );
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertCamera( const Camera& cam, const std::string &orig_name );
-
-    // ------------------------------------------------------------------------------------------------
-    void GetUniqueName( const std::string &name, std::string& uniqueName );
-
-    // ------------------------------------------------------------------------------------------------
-    // this returns unified names usable within assimp identifiers (i.e. no space characters -
-    // while these would be allowed, they are a potential trouble spot so better not use them).
-    const char* NameTransformationComp(TransformationComp comp);
-
-    // ------------------------------------------------------------------------------------------------
-    // Returns an unique name for a node or traverses up a hierarchy until a non-empty name is found and
-    // then makes this name unique
-    std::string MakeUniqueNodeName(const Model* const model, const aiNode& parent);
-
-    // ------------------------------------------------------------------------------------------------
-    // note: this returns the REAL fbx property names
-    const char* NameTransformationCompProperty(TransformationComp comp);
-
-    // ------------------------------------------------------------------------------------------------
-    aiVector3D TransformationCompDefaultValue(TransformationComp comp);
-
-    // ------------------------------------------------------------------------------------------------
-    void GetRotationMatrix(Model::RotOrder mode, const aiVector3D& rotation, aiMatrix4x4& out);
-    // ------------------------------------------------------------------------------------------------
-    /**
-    *  checks if a node has more than just scaling, rotation and translation components
-    */
-    bool NeedsComplexTransformationChain(const Model& model);
-
-    // ------------------------------------------------------------------------------------------------
-    // note: name must be a FixNodeName() result
-    std::string NameTransformationChainNode(const std::string& name, TransformationComp comp);
-
-    // ------------------------------------------------------------------------------------------------
-    /**
-    *  note: memory for output_nodes is managed by the caller, via the PotentialNode struct.
-    */
-    struct PotentialNode;
-    bool GenerateTransformationNodeChain(const Model& model, const std::string& name, std::vector<PotentialNode>& output_nodes, std::vector<PotentialNode>& post_output_nodes);
-
-    // ------------------------------------------------------------------------------------------------
-    void SetupNodeMetadata(const Model& model, aiNode& nd);
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertModel(const Model &model, aiNode *parent, aiNode *root_node,
-                      const aiMatrix4x4 &absolute_transform);
-
-    // ------------------------------------------------------------------------------------------------
-    // MeshGeometry -> aiMesh, return mesh index + 1 or 0 if the conversion failed
-    std::vector<unsigned int>
-    ConvertMesh(const MeshGeometry &mesh, const Model &model, aiNode *parent, aiNode *root_node,
-                const aiMatrix4x4 &absolute_transform);
-
-    // ------------------------------------------------------------------------------------------------
-    std::vector<unsigned int> ConvertLine(const LineGeometry& line, aiNode *root_node);
-
-    // ------------------------------------------------------------------------------------------------
-    aiMesh* SetupEmptyMesh(const Geometry& mesh, aiNode *parent);
-
-    // ------------------------------------------------------------------------------------------------
-    unsigned int ConvertMeshSingleMaterial(const MeshGeometry &mesh, const Model &model,
-                                           const aiMatrix4x4 &absolute_transform, aiNode *parent,
-                                           aiNode *root_node);
-
-    // ------------------------------------------------------------------------------------------------
-    std::vector<unsigned int>
-    ConvertMeshMultiMaterial(const MeshGeometry &mesh, const Model &model, aiNode *parent, aiNode *root_node,
-                             const aiMatrix4x4 &absolute_transform);
-
-    // ------------------------------------------------------------------------------------------------
-    unsigned int ConvertMeshMultiMaterial(const MeshGeometry &mesh, const Model &model, MatIndexArray::value_type index,
-                                          aiNode *parent, aiNode *root_node, const aiMatrix4x4 &absolute_transform);
-
-    // ------------------------------------------------------------------------------------------------
-    static const unsigned int NO_MATERIAL_SEPARATION = /* std::numeric_limits<unsigned int>::max() */
-        static_cast<unsigned int>(-1);
-
-    // ------------------------------------------------------------------------------------------------
-    /**
-    *  - if materialIndex == NO_MATERIAL_SEPARATION, materials are not taken into
-    *    account when determining which weights to include.
-    *  - outputVertStartIndices is only used when a material index is specified, it gives for
-    *    each output vertex the DOM index it maps to.
-    */
-    void ConvertWeights(aiMesh *out, const MeshGeometry &geo, const aiMatrix4x4 &absolute_transform,
-            aiNode *parent = nullptr, unsigned int materialIndex = NO_MATERIAL_SEPARATION,
-            std::vector<unsigned int> *outputVertStartIndices = nullptr);
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertCluster(std::vector<aiBone *> &local_mesh_bones, const Cluster *cl,
-                        std::vector<size_t> &out_indices, std::vector<size_t> &index_out_indices,
-                        std::vector<size_t> &count_out_indices, const aiMatrix4x4 &absolute_transform,
-                        aiNode *parent );
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertMaterialForMesh(aiMesh* out, const Model& model, const MeshGeometry& geo,
-        MatIndexArray::value_type materialIndex);
-
-    // ------------------------------------------------------------------------------------------------
-    unsigned int GetDefaultMaterial();
-
-    // ------------------------------------------------------------------------------------------------
-    // Material -> aiMaterial
-    unsigned int ConvertMaterial(const Material& material, const MeshGeometry* const mesh);
-
-    // ------------------------------------------------------------------------------------------------
-    // Video -> aiTexture
-    unsigned int ConvertVideo(const Video& video);
-
-    // ------------------------------------------------------------------------------------------------
-    // convert embedded texture if necessary and return actual texture path
-    aiString GetTexturePath(const Texture* tex);
-
-    // ------------------------------------------------------------------------------------------------
-    void TrySetTextureProperties(aiMaterial* out_mat, const TextureMap& textures,
-        const std::string& propName,
-        aiTextureType target, const MeshGeometry* const mesh);
-
-    // ------------------------------------------------------------------------------------------------
-    void TrySetTextureProperties(aiMaterial* out_mat, const LayeredTextureMap& layeredTextures,
-        const std::string& propName,
-        aiTextureType target, const MeshGeometry* const mesh);
-
-    // ------------------------------------------------------------------------------------------------
-    void SetTextureProperties(aiMaterial* out_mat, const TextureMap& textures, const MeshGeometry* const mesh);
-
-    // ------------------------------------------------------------------------------------------------
-    void SetTextureProperties(aiMaterial* out_mat, const LayeredTextureMap& layeredTextures, const MeshGeometry* const mesh);
-
-    // ------------------------------------------------------------------------------------------------
-    aiColor3D GetColorPropertyFromMaterial(const PropertyTable& props, const std::string& baseName,
-        bool& result);
-    aiColor3D GetColorPropertyFactored(const PropertyTable& props, const std::string& colorName,
-        const std::string& factorName, bool& result, bool useTemplate = true);
-    aiColor3D GetColorProperty(const PropertyTable& props, const std::string& colorName,
-        bool& result, bool useTemplate = true);
-
-    // ------------------------------------------------------------------------------------------------
-    void SetShadingPropertiesCommon(aiMaterial* out_mat, const PropertyTable& props);
-    void SetShadingPropertiesRaw(aiMaterial* out_mat, const PropertyTable& props, const TextureMap& textures, const MeshGeometry* const mesh);
-
-    // ------------------------------------------------------------------------------------------------
-    // get the number of fps for a FrameRate enumerated value
-    static double FrameRateToDouble(FileGlobalSettings::FrameRate fp, double customFPSVal = -1.0);
-
-    // ------------------------------------------------------------------------------------------------
-    // convert animation data to aiAnimation et al
-    void ConvertAnimations();
-
-    // ------------------------------------------------------------------------------------------------
-    // takes a fbx node name and returns the identifier to be used in the assimp output scene.
-    // the function is guaranteed to provide consistent results over multiple invocations
-    // UNLESS RenameNode() is called for a particular node name.
-    std::string FixNodeName(const std::string& name);
-    std::string FixAnimMeshName(const std::string& name);
-
-    typedef std::map<const AnimationCurveNode*, const AnimationLayer*> LayerMap;
-
-    // XXX: better use multi_map ..
-    typedef std::map<std::string, std::vector<const AnimationCurveNode*> > NodeMap;
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertAnimationStack(const AnimationStack& st);
-
-    // ------------------------------------------------------------------------------------------------
-    void ProcessMorphAnimDatas(std::map<std::string, morphAnimData*>* morphAnimDatas, const BlendShapeChannel* bsc, const AnimationCurveNode* node);
-
-    // ------------------------------------------------------------------------------------------------
-    void GenerateNodeAnimations(std::vector<aiNodeAnim*>& node_anims,
-        const std::string& fixed_name,
-        const std::vector<const AnimationCurveNode*>& curves,
-        const LayerMap& layer_map,
-        int64_t start, int64_t stop,
-        double& max_time,
-        double& min_time);
-
-    // ------------------------------------------------------------------------------------------------
-    bool IsRedundantAnimationData(const Model& target,
-        TransformationComp comp,
-        const std::vector<const AnimationCurveNode*>& curves);
-
-    // ------------------------------------------------------------------------------------------------
-    aiNodeAnim* GenerateRotationNodeAnim(const std::string& name,
-        const Model& target,
-        const std::vector<const AnimationCurveNode*>& curves,
-        const LayerMap& layer_map,
-        int64_t start, int64_t stop,
-        double& max_time,
-        double& min_time);
-
-    // ------------------------------------------------------------------------------------------------
-    aiNodeAnim* GenerateScalingNodeAnim(const std::string& name,
-        const Model& /*target*/,
-        const std::vector<const AnimationCurveNode*>& curves,
-        const LayerMap& layer_map,
-        int64_t start, int64_t stop,
-        double& max_time,
-        double& min_time);
-
-    // ------------------------------------------------------------------------------------------------
-    aiNodeAnim* GenerateTranslationNodeAnim(const std::string& name,
-        const Model& /*target*/,
-        const std::vector<const AnimationCurveNode*>& curves,
-        const LayerMap& layer_map,
-        int64_t start, int64_t stop,
-        double& max_time,
-        double& min_time,
-        bool inverse = false);
-
-    // ------------------------------------------------------------------------------------------------
-    // generate node anim, extracting only Rotation, Scaling and Translation from the given chain
-    aiNodeAnim* GenerateSimpleNodeAnim(const std::string& name,
-        const Model& target,
-        NodeMap::const_iterator chain[TransformationComp_MAXIMUM],
-        NodeMap::const_iterator iterEnd,
-        int64_t start, int64_t stop,
-        double& maxTime,
-        double& minTime);
-
-    // key (time), value, mapto (component index)
-    typedef std::tuple<std::shared_ptr<KeyTimeList>, std::shared_ptr<KeyValueList>, unsigned int > KeyFrameList;
-    typedef std::vector<KeyFrameList> KeyFrameListList;
-
-    // ------------------------------------------------------------------------------------------------
-    KeyFrameListList GetKeyframeList(const std::vector<const AnimationCurveNode*>& nodes, int64_t start, int64_t stop);
-    KeyFrameListList GetRotationKeyframeList(const std::vector<const AnimationCurveNode*>& nodes, int64_t start, int64_t stop);
-
-    // ------------------------------------------------------------------------------------------------
-    KeyTimeList GetKeyTimeList(const KeyFrameListList& inputs);
-
-    // ------------------------------------------------------------------------------------------------
-    void InterpolateKeys(aiVectorKey* valOut, const KeyTimeList& keys, const KeyFrameListList& inputs,
-        const aiVector3D& def_value,
-        double& max_time,
-        double& min_time);
-
-    // ------------------------------------------------------------------------------------------------
-    void InterpolateKeys(aiQuatKey* valOut, const KeyTimeList& keys, const KeyFrameListList& inputs,
-        const aiVector3D& def_value,
-        double& maxTime,
-        double& minTime,
-        Model::RotOrder order);
-
-    // ------------------------------------------------------------------------------------------------
-    // euler xyz -> quat
-    aiQuaternion EulerToQuaternion(const aiVector3D& rot, Model::RotOrder order);
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertScaleKeys(aiNodeAnim* na, const std::vector<const AnimationCurveNode*>& nodes, const LayerMap& /*layers*/,
-        int64_t start, int64_t stop,
-        double& maxTime,
-        double& minTime);
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertTranslationKeys(aiNodeAnim* na, const std::vector<const AnimationCurveNode*>& nodes,
-        const LayerMap& /*layers*/,
-        int64_t start, int64_t stop,
-        double& maxTime,
-        double& minTime);
-
-    // ------------------------------------------------------------------------------------------------
-    void ConvertRotationKeys(aiNodeAnim* na, const std::vector<const AnimationCurveNode*>& nodes,
-        const LayerMap& /*layers*/,
-        int64_t start, int64_t stop,
-        double& maxTime,
-        double& minTime,
-        Model::RotOrder order);
-
-    // ------------------------------------------------------------------------------------------------
-    // Copy global geometric data and some information about the source asset into scene metadata.
-    void ConvertGlobalSettings();
-
-    // ------------------------------------------------------------------------------------------------
-    // copy generated meshes, animations, lights, cameras and textures to the output scene
-    void TransferDataToScene();
-
-    // ------------------------------------------------------------------------------------------------
-    // FBX file could have embedded textures not connected to anything
-    void ConvertOrphanedEmbeddedTextures();
-
-private:
-    // 0: not assigned yet, others: index is value - 1
-    unsigned int defaultMaterialIndex;
-
-    std::vector<aiMesh*> mMeshes;
-    std::vector<aiMaterial*> materials;
-    std::vector<aiAnimation*> animations;
-    std::vector<aiLight*> lights;
-    std::vector<aiCamera*> cameras;
-    std::vector<aiTexture*> textures;
-
-    using MaterialMap = std::fbx_unordered_map<const Material*, unsigned int>;
-    MaterialMap materials_converted;
-
-    using VideoMap = std::fbx_unordered_map<const Video*, unsigned int>;
-    VideoMap textures_converted;
-
-    using MeshMap = std::fbx_unordered_map<const Geometry*, std::vector<unsigned int> >;
-    MeshMap meshes_converted;
-
-    // fixed node name -> which trafo chain components have animations?
-    using NodeAnimBitMap = std::fbx_unordered_map<std::string, unsigned int> ;
-    NodeAnimBitMap node_anim_chain_bits;
-
-    // number of nodes with the same name
-    using NodeNameCache = std::fbx_unordered_map<std::string, unsigned int>;
-    NodeNameCache mNodeNames;
-
-    // Deformer name is not the same as a bone name - it does contain the bone name though :)
-    // Deformer names in FBX are always unique in an FBX file.
-    std::map<const std::string, aiBone *> bone_map;
-
-    double anim_fps;
-
-    aiScene* const mSceneOut;
-    const FBX::Document& doc;
-    bool mRemoveEmptyBones;
-    static void BuildBoneList(aiNode *current_node, const aiNode *root_node, const aiScene *scene,
-                             std::vector<aiBone*>& bones);
-
-    void BuildBoneStack(aiNode *current_node, const aiNode *root_node, const aiScene *scene,
-                   const std::vector<aiBone *> &bones,
-                   std::map<aiBone *, aiNode *> &bone_stack,
-                   std::vector<aiNode*> &node_stack );
-
-    static void BuildNodeList(aiNode *current_node, std::vector<aiNode *> &nodes);
-
-    static aiNode *GetNodeFromStack(const aiString &node_name, std::vector<aiNode *> &nodes);
-
-    static aiNode *GetArmatureRoot(aiNode *bone_node, std::vector<aiBone*> &bone_list);
-
-    static bool IsBoneNode(const aiString &bone_name, std::vector<aiBone *> &bones);
-};
-
-}
-}
-
-#endif // INCLUDED_AI_FBX_CONVERTER_H
diff --git a/libs/assimp/code/AssetLib/FBX/FBXDeformer.cpp b/libs/assimp/code/AssetLib/FBX/FBXDeformer.cpp
deleted file mode 100644
index ba245ed..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXDeformer.cpp
+++ /dev/null
@@ -1,213 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXNoteAttribute.cpp
- *  @brief Assimp::FBX::NodeAttribute (and subclasses) implementation
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXParser.h"
-#include "FBXDocument.h"
-#include "FBXMeshGeometry.h"
-#include "FBXImporter.h"
-#include "FBXDocumentUtil.h"
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-Deformer::Deformer(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-    : Object(id,element,name)
-{
-    const Scope& sc = GetRequiredScope(element);
-
-    const std::string& classname = ParseTokenAsString(GetRequiredToken(element,2));
-    props = GetPropertyTable(doc,"Deformer.Fbx" + classname,element,sc,true);
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Deformer::~Deformer()
-{
-
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Cluster::Cluster(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-: Deformer(id,element,doc,name)
-, node()
-{
-    const Scope& sc = GetRequiredScope(element);
-
-    const Element* const Indexes = sc["Indexes"];
-    const Element* const Weights = sc["Weights"];
-
-    const Element& Transform = GetRequiredElement(sc,"Transform",&element);
-    const Element& TransformLink = GetRequiredElement(sc,"TransformLink",&element);
-
-    transform = ReadMatrix(Transform);
-    transformLink = ReadMatrix(TransformLink);
-
-    // it is actually possible that there be Deformer's with no weights
-    if (!!Indexes != !!Weights) {
-        DOMError("either Indexes or Weights are missing from Cluster",&element);
-    }
-
-    if(Indexes) {
-        ParseVectorDataArray(indices,*Indexes);
-        ParseVectorDataArray(weights,*Weights);
-    }
-
-    if(indices.size() != weights.size()) {
-        DOMError("sizes of index and weight array don't match up",&element);
-    }
-
-    // read assigned node
-    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Model");
-    for(const Connection* con : conns) {
-        const Model* const mod = ProcessSimpleConnection<Model>(*con, false, "Model -> Cluster", element);
-        if(mod) {
-            node = mod;
-            break;
-        }
-    }
-
-    if (!node) {
-        DOMError("failed to read target Node for Cluster",&element);
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Cluster::~Cluster()
-{
-
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Skin::Skin(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-: Deformer(id,element,doc,name)
-, accuracy( 0.0f ) {
-    const Scope& sc = GetRequiredScope(element);
-
-    const Element* const Link_DeformAcuracy = sc["Link_DeformAcuracy"];
-    if(Link_DeformAcuracy) {
-        accuracy = ParseTokenAsFloat(GetRequiredToken(*Link_DeformAcuracy,0));
-    }
-
-    // resolve assigned clusters
-    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Deformer");
-
-    clusters.reserve(conns.size());
-    for(const Connection* con : conns) {
-
-        const Cluster* const cluster = ProcessSimpleConnection<Cluster>(*con, false, "Cluster -> Skin", element);
-        if(cluster) {
-            clusters.push_back(cluster);
-            continue;
-        }
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Skin::~Skin()
-{
-
-}
-// ------------------------------------------------------------------------------------------------
-BlendShape::BlendShape(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-    : Deformer(id, element, doc, name)
-{
-    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(), "Deformer");
-    blendShapeChannels.reserve(conns.size());
-    for (const Connection* con : conns) {
-        const BlendShapeChannel* const bspc = ProcessSimpleConnection<BlendShapeChannel>(*con, false, "BlendShapeChannel -> BlendShape", element);
-        if (bspc) {
-            blendShapeChannels.push_back(bspc);
-            continue;
-        }
-    }
-}
-// ------------------------------------------------------------------------------------------------
-BlendShape::~BlendShape()
-{
-
-}
-// ------------------------------------------------------------------------------------------------
-BlendShapeChannel::BlendShapeChannel(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-    : Deformer(id, element, doc, name)
-{
-    const Scope& sc = GetRequiredScope(element);
-    const Element* const DeformPercent = sc["DeformPercent"];
-    if (DeformPercent) {
-        percent = ParseTokenAsFloat(GetRequiredToken(*DeformPercent, 0));
-    }
-    const Element* const FullWeights = sc["FullWeights"];
-    if (FullWeights) {
-        ParseVectorDataArray(fullWeights, *FullWeights);
-    }
-    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(), "Geometry");
-    shapeGeometries.reserve(conns.size());
-    for (const Connection* con : conns) {
-        const ShapeGeometry* const sg = ProcessSimpleConnection<ShapeGeometry>(*con, false, "Shape -> BlendShapeChannel", element);
-        if (sg) {
-            shapeGeometries.push_back(sg);
-            continue;
-        }
-    }
-}
-// ------------------------------------------------------------------------------------------------
-BlendShapeChannel::~BlendShapeChannel()
-{
-
-}
-// ------------------------------------------------------------------------------------------------
-}
-}
-#endif
-
diff --git a/libs/assimp/code/AssetLib/FBX/FBXDocument.cpp b/libs/assimp/code/AssetLib/FBX/FBXDocument.cpp
deleted file mode 100644
index f228b17..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXDocument.cpp
+++ /dev/null
@@ -1,722 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the*
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXDocument.cpp
- *  @brief Implementation of the FBX DOM classes
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXDocument.h"
-#include "FBXMeshGeometry.h"
-#include "FBXParser.h"
-#include "FBXUtil.h"
-#include "FBXImporter.h"
-#include "FBXImportSettings.h"
-#include "FBXDocumentUtil.h"
-#include "FBXProperties.h"
-
-#include <assimp/DefaultLogger.hpp>
-
-#include <functional>
-#include <map>
-#include <memory>
-#include <utility>
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-LazyObject::LazyObject(uint64_t id, const Element& element, const Document& doc)
-: doc(doc)
-, element(element)
-, id(id)
-, flags() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-LazyObject::~LazyObject()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-const Object* LazyObject::Get(bool dieOnError)
-{
-    if(IsBeingConstructed() || FailedToConstruct()) {
-        return nullptr;
-    }
-
-    if (object.get()) {
-        return object.get();
-    }
-
-    const Token& key = element.KeyToken();
-    const TokenList& tokens = element.Tokens();
-
-    if(tokens.size() < 3) {
-        DOMError("expected at least 3 tokens: id, name and class tag",&element);
-    }
-
-    const char* err;
-    std::string name = ParseTokenAsString(*tokens[1],err);
-    if (err) {
-        DOMError(err,&element);
-    }
-
-    // small fix for binary reading: binary fbx files don't use
-    // prefixes such as Model:: in front of their names. The
-    // loading code expects this at many places, though!
-    // so convert the binary representation (a 0x0001) to the
-    // double colon notation.
-    if(tokens[1]->IsBinary()) {
-        for (size_t i = 0; i < name.length(); ++i) {
-            if (name[i] == 0x0 && name[i+1] == 0x1) {
-                name = name.substr(i+2) + "::" + name.substr(0,i);
-            }
-        }
-    }
-
-    const std::string classtag = ParseTokenAsString(*tokens[2],err);
-    if (err) {
-        DOMError(err,&element);
-    }
-
-    // prevent recursive calls
-    flags |= BEING_CONSTRUCTED;
-
-    try {
-        // this needs to be relatively fast since it happens a lot,
-        // so avoid constructing strings all the time.
-        const char* obtype = key.begin();
-        const size_t length = static_cast<size_t>(key.end()-key.begin());
-
-        // For debugging
-        //dumpObjectClassInfo( objtype, classtag );
-
-        if (!strncmp(obtype,"Geometry",length)) {
-            if (!strcmp(classtag.c_str(),"Mesh")) {
-                object.reset(new MeshGeometry(id,element,name,doc));
-            }
-            if (!strcmp(classtag.c_str(), "Shape")) {
-                object.reset(new ShapeGeometry(id, element, name, doc));
-            }
-            if (!strcmp(classtag.c_str(), "Line")) {
-                object.reset(new LineGeometry(id, element, name, doc));
-            }
-        }
-        else if (!strncmp(obtype,"NodeAttribute",length)) {
-            if (!strcmp(classtag.c_str(),"Camera")) {
-                object.reset(new Camera(id,element,doc,name));
-            }
-            else if (!strcmp(classtag.c_str(),"CameraSwitcher")) {
-                object.reset(new CameraSwitcher(id,element,doc,name));
-            }
-            else if (!strcmp(classtag.c_str(),"Light")) {
-                object.reset(new Light(id,element,doc,name));
-            }
-            else if (!strcmp(classtag.c_str(),"Null")) {
-                object.reset(new Null(id,element,doc,name));
-            }
-            else if (!strcmp(classtag.c_str(),"LimbNode")) {
-                object.reset(new LimbNode(id,element,doc,name));
-            }
-        }
-        else if (!strncmp(obtype,"Deformer",length)) {
-            if (!strcmp(classtag.c_str(),"Cluster")) {
-                object.reset(new Cluster(id,element,doc,name));
-            }
-            else if (!strcmp(classtag.c_str(),"Skin")) {
-                object.reset(new Skin(id,element,doc,name));
-            }
-            else if (!strcmp(classtag.c_str(), "BlendShape")) {
-                object.reset(new BlendShape(id, element, doc, name));
-            }
-            else if (!strcmp(classtag.c_str(), "BlendShapeChannel")) {
-                object.reset(new BlendShapeChannel(id, element, doc, name));
-            }
-        }
-        else if ( !strncmp( obtype, "Model", length ) ) {
-            // FK and IK effectors are not supported
-            if ( strcmp( classtag.c_str(), "IKEffector" ) && strcmp( classtag.c_str(), "FKEffector" ) ) {
-                object.reset( new Model( id, element, doc, name ) );
-            }
-        }
-        else if (!strncmp(obtype,"Material",length)) {
-            object.reset(new Material(id,element,doc,name));
-        }
-        else if (!strncmp(obtype,"Texture",length)) {
-            object.reset(new Texture(id,element,doc,name));
-        }
-        else if (!strncmp(obtype,"LayeredTexture",length)) {
-            object.reset(new LayeredTexture(id,element,doc,name));
-        }
-        else if (!strncmp(obtype,"Video",length)) {
-            object.reset(new Video(id,element,doc,name));
-        }
-        else if (!strncmp(obtype,"AnimationStack",length)) {
-            object.reset(new AnimationStack(id,element,name,doc));
-        }
-        else if (!strncmp(obtype,"AnimationLayer",length)) {
-            object.reset(new AnimationLayer(id,element,name,doc));
-        }
-        // note: order matters for these two
-        else if (!strncmp(obtype,"AnimationCurve",length)) {
-            object.reset(new AnimationCurve(id,element,name,doc));
-        }
-        else if (!strncmp(obtype,"AnimationCurveNode",length)) {
-            object.reset(new AnimationCurveNode(id,element,name,doc));
-        }
-    }
-    catch(std::exception& ex) {
-        flags &= ~BEING_CONSTRUCTED;
-        flags |= FAILED_TO_CONSTRUCT;
-
-        if(dieOnError || doc.Settings().strictMode) {
-            throw;
-        }
-
-        // note: the error message is already formatted, so raw logging is ok
-        if(!DefaultLogger::isNullLogger()) {
-            ASSIMP_LOG_ERROR(ex.what());
-        }
-        return nullptr;
-    }
-
-    if (!object.get()) {
-        //DOMError("failed to convert element to DOM object, class: " + classtag + ", name: " + name,&element);
-    }
-
-    flags &= ~BEING_CONSTRUCTED;
-    return object.get();
-}
-
-// ------------------------------------------------------------------------------------------------
-Object::Object(uint64_t id, const Element& element, const std::string& name)
-: element(element)
-, name(name)
-, id(id)
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-Object::~Object()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-FileGlobalSettings::FileGlobalSettings(const Document &doc, std::shared_ptr<const PropertyTable> props) :
-        props(std::move(props)), doc(doc) {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-FileGlobalSettings::~FileGlobalSettings()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-Document::Document(const Parser& parser, const ImportSettings& settings)
-: settings(settings)
-, parser(parser)
-{
-	ASSIMP_LOG_DEBUG("Creating FBX Document");
-
-    // Cannot use array default initialization syntax because vc8 fails on it
-    for (auto &timeStamp : creationTimeStamp) {
-        timeStamp = 0;
-    }
-
-    ReadHeader();
-    ReadPropertyTemplates();
-
-    ReadGlobalSettings();
-
-    // This order is important, connections need parsed objects to check
-    // whether connections are ok or not. Objects may not be evaluated yet,
-    // though, since this may require valid connections.
-    ReadObjects();
-    ReadConnections();
-}
-
-// ------------------------------------------------------------------------------------------------
-Document::~Document()
-{
-    for(ObjectMap::value_type& v : objects) {
-        delete v.second;
-    }
-
-    for(ConnectionMap::value_type& v : src_connections) {
-        delete v.second;
-    }
-    // |dest_connections| contain the same Connection objects as the |src_connections|
-}
-
-// ------------------------------------------------------------------------------------------------
-static const unsigned int LowerSupportedVersion = 7100;
-static const unsigned int UpperSupportedVersion = 7400;
-
-void Document::ReadHeader() {
-    // Read ID objects from "Objects" section
-    const Scope& sc = parser.GetRootScope();
-    const Element* const ehead = sc["FBXHeaderExtension"];
-    if(!ehead || !ehead->Compound()) {
-        DOMError("no FBXHeaderExtension dictionary found");
-    }
-
-    const Scope& shead = *ehead->Compound();
-    fbxVersion = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(shead,"FBXVersion",ehead),0));
-	ASSIMP_LOG_DEBUG("FBX Version: ", fbxVersion);
-
-    // While we may have some success with newer files, we don't support
-    // the older 6.n fbx format
-    if(fbxVersion < LowerSupportedVersion ) {
-        DOMError("unsupported, old format version, supported are only FBX 2011, FBX 2012 and FBX 2013");
-    }
-    if(fbxVersion > UpperSupportedVersion ) {
-        if(Settings().strictMode) {
-            DOMError("unsupported, newer format version, supported are only FBX 2011, FBX 2012 and FBX 2013"
-                " (turn off strict mode to try anyhow) ");
-        }
-        else {
-            DOMWarning("unsupported, newer format version, supported are only FBX 2011, FBX 2012 and FBX 2013,"
-                " trying to read it nevertheless");
-        }
-    }
-
-    const Element* const ecreator = shead["Creator"];
-    if(ecreator) {
-        creator = ParseTokenAsString(GetRequiredToken(*ecreator,0));
-    }
-
-    const Element* const etimestamp = shead["CreationTimeStamp"];
-    if(etimestamp && etimestamp->Compound()) {
-        const Scope& stimestamp = *etimestamp->Compound();
-        creationTimeStamp[0] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Year"),0));
-        creationTimeStamp[1] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Month"),0));
-        creationTimeStamp[2] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Day"),0));
-        creationTimeStamp[3] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Hour"),0));
-        creationTimeStamp[4] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Minute"),0));
-        creationTimeStamp[5] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Second"),0));
-        creationTimeStamp[6] = ParseTokenAsInt(GetRequiredToken(GetRequiredElement(stimestamp,"Millisecond"),0));
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void Document::ReadGlobalSettings()
-{
-    const Scope& sc = parser.GetRootScope();
-    const Element* const ehead = sc["GlobalSettings"];
-    if ( nullptr == ehead || !ehead->Compound() ) {
-        DOMWarning( "no GlobalSettings dictionary found" );
-        globals.reset(new FileGlobalSettings(*this, std::make_shared<const PropertyTable>()));
-        return;
-    }
-
-    std::shared_ptr<const PropertyTable> props = GetPropertyTable( *this, "", *ehead, *ehead->Compound(), true );
-
-    //double v = PropertyGet<float>( *props.get(), std::string("UnitScaleFactor"), 1.0 );
-
-    if(!props) {
-        DOMError("GlobalSettings dictionary contains no property table");
-    }
-
-    globals.reset(new FileGlobalSettings(*this, props));
-}
-
-// ------------------------------------------------------------------------------------------------
-void Document::ReadObjects()
-{
-    // read ID objects from "Objects" section
-    const Scope& sc = parser.GetRootScope();
-    const Element* const eobjects = sc["Objects"];
-    if(!eobjects || !eobjects->Compound()) {
-        DOMError("no Objects dictionary found");
-    }
-
-    // add a dummy entry to represent the Model::RootNode object (id 0),
-    // which is only indirectly defined in the input file
-    objects[0] = new LazyObject(0L, *eobjects, *this);
-
-    const Scope& sobjects = *eobjects->Compound();
-    for(const ElementMap::value_type& el : sobjects.Elements()) {
-
-        // extract ID
-        const TokenList& tok = el.second->Tokens();
-
-        if (tok.empty()) {
-            DOMError("expected ID after object key",el.second);
-        }
-
-        const char* err;
-        const uint64_t id = ParseTokenAsID(*tok[0], err);
-        if(err) {
-            DOMError(err,el.second);
-        }
-
-        // id=0 is normally implicit
-        if(id == 0L) {
-            DOMError("encountered object with implicitly defined id 0",el.second);
-        }
-
-        if(objects.find(id) != objects.end()) {
-            DOMWarning("encountered duplicate object id, ignoring first occurrence",el.second);
-        }
-
-        objects[id] = new LazyObject(id, *el.second, *this);
-
-        // grab all animation stacks upfront since there is no listing of them
-        if(!strcmp(el.first.c_str(),"AnimationStack")) {
-            animationStacks.push_back(id);
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void Document::ReadPropertyTemplates()
-{
-    const Scope& sc = parser.GetRootScope();
-    // read property templates from "Definitions" section
-    const Element* const edefs = sc["Definitions"];
-    if(!edefs || !edefs->Compound()) {
-        DOMWarning("no Definitions dictionary found");
-        return;
-    }
-
-    const Scope& sdefs = *edefs->Compound();
-    const ElementCollection otypes = sdefs.GetCollection("ObjectType");
-    for(ElementMap::const_iterator it = otypes.first; it != otypes.second; ++it) {
-        const Element& el = *(*it).second;
-        const Scope* curSc = el.Compound();
-        if (!curSc) {
-            DOMWarning("expected nested scope in ObjectType, ignoring",&el);
-            continue;
-        }
-
-        const TokenList& tok = el.Tokens();
-        if(tok.empty()) {
-            DOMWarning("expected name for ObjectType element, ignoring",&el);
-            continue;
-        }
-
-        const std::string& oname = ParseTokenAsString(*tok[0]);
-
-        const ElementCollection templs = curSc->GetCollection("PropertyTemplate");
-        for (ElementMap::const_iterator elemIt = templs.first; elemIt != templs.second; ++elemIt) {
-            const Element &innerEl = *(*elemIt).second;
-            const Scope *innerSc = innerEl.Compound();
-            if (!innerSc) {
-                DOMWarning("expected nested scope in PropertyTemplate, ignoring",&el);
-                continue;
-            }
-
-            const TokenList &curTok = innerEl.Tokens();
-            if (curTok.empty()) {
-                DOMWarning("expected name for PropertyTemplate element, ignoring",&el);
-                continue;
-            }
-
-            const std::string &pname = ParseTokenAsString(*curTok[0]);
-
-            const Element *Properties70 = (*innerSc)["Properties70"];
-            if(Properties70) {
-                std::shared_ptr<const PropertyTable> props = std::make_shared<const PropertyTable>(
-                        *Properties70, std::shared_ptr<const PropertyTable>(static_cast<const PropertyTable *>(nullptr))
-                );
-
-                templates[oname+"."+pname] = props;
-            }
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void Document::ReadConnections()
-{
-    const Scope& sc = parser.GetRootScope();
-    // read property templates from "Definitions" section
-    const Element* const econns = sc["Connections"];
-    if(!econns || !econns->Compound()) {
-        DOMError("no Connections dictionary found");
-    }
-
-    uint64_t insertionOrder = 0l;
-    const Scope& sconns = *econns->Compound();
-    const ElementCollection conns = sconns.GetCollection("C");
-    for(ElementMap::const_iterator it = conns.first; it != conns.second; ++it) {
-        const Element& el = *(*it).second;
-        const std::string& type = ParseTokenAsString(GetRequiredToken(el,0));
-
-        // PP = property-property connection, ignored for now
-        // (tokens: "PP", ID1, "Property1", ID2, "Property2")
-        if ( type == "PP" ) {
-            continue;
-        }
-
-        const uint64_t src = ParseTokenAsID(GetRequiredToken(el,1));
-        const uint64_t dest = ParseTokenAsID(GetRequiredToken(el,2));
-
-        // OO = object-object connection
-        // OP = object-property connection, in which case the destination property follows the object ID
-        const std::string& prop = (type == "OP" ? ParseTokenAsString(GetRequiredToken(el,3)) : "");
-
-        if(objects.find(src) == objects.end()) {
-            DOMWarning("source object for connection does not exist",&el);
-            continue;
-        }
-
-        // dest may be 0 (root node) but we added a dummy object before
-        if(objects.find(dest) == objects.end()) {
-            DOMWarning("destination object for connection does not exist",&el);
-            continue;
-        }
-
-        // add new connection
-        const Connection* const c = new Connection(insertionOrder++,src,dest,prop,*this);
-        src_connections.insert(ConnectionMap::value_type(src,c));
-        dest_connections.insert(ConnectionMap::value_type(dest,c));
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<const AnimationStack*>& Document::AnimationStacks() const
-{
-    if (!animationStacksResolved.empty() || animationStacks.empty()) {
-        return animationStacksResolved;
-    }
-
-    animationStacksResolved.reserve(animationStacks.size());
-    for(uint64_t id : animationStacks) {
-        LazyObject* const lazy = GetObject(id);
-        const AnimationStack *stack = lazy->Get<AnimationStack>();
-        if(!lazy || nullptr == stack ) {
-            DOMWarning("failed to read AnimationStack object");
-            continue;
-        }
-        animationStacksResolved.push_back(stack);
-    }
-
-    return animationStacksResolved;
-}
-
-// ------------------------------------------------------------------------------------------------
-LazyObject* Document::GetObject(uint64_t id) const
-{
-    ObjectMap::const_iterator it = objects.find(id);
-    return it == objects.end() ? nullptr : (*it).second;
-}
-
-#define MAX_CLASSNAMES 6
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsSequenced(uint64_t id, const ConnectionMap& conns) const
-{
-    std::vector<const Connection*> temp;
-
-    const std::pair<ConnectionMap::const_iterator,ConnectionMap::const_iterator> range =
-        conns.equal_range(id);
-
-    temp.reserve(std::distance(range.first,range.second));
-    for (ConnectionMap::const_iterator it = range.first; it != range.second; ++it) {
-        temp.push_back((*it).second);
-    }
-
-    std::sort(temp.begin(), temp.end(), std::mem_fn(&Connection::Compare));
-
-    return temp; // NRVO should handle this
-}
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsSequenced(uint64_t id, bool is_src,
-    const ConnectionMap& conns,
-    const char* const* classnames,
-    size_t count) const
-
-{
-    ai_assert(classnames);
-    ai_assert( count != 0 );
-    ai_assert( count <= MAX_CLASSNAMES);
-
-    size_t lengths[MAX_CLASSNAMES];
-
-    const size_t c = count;
-    for (size_t i = 0; i < c; ++i) {
-        lengths[ i ] = strlen(classnames[i]);
-    }
-
-    std::vector<const Connection*> temp;
-    const std::pair<ConnectionMap::const_iterator,ConnectionMap::const_iterator> range =
-        conns.equal_range(id);
-
-    temp.reserve(std::distance(range.first,range.second));
-    for (ConnectionMap::const_iterator it = range.first; it != range.second; ++it) {
-        const Token& key = (is_src
-            ? (*it).second->LazyDestinationObject()
-            : (*it).second->LazySourceObject()
-        ).GetElement().KeyToken();
-
-        const char* obtype = key.begin();
-
-        for (size_t i = 0; i < c; ++i) {
-            ai_assert(classnames[i]);
-            if(static_cast<size_t>(std::distance(key.begin(),key.end())) == lengths[i] && !strncmp(classnames[i],obtype,lengths[i])) {
-                obtype = nullptr;
-                break;
-            }
-        }
-
-        if(obtype) {
-            continue;
-        }
-
-        temp.push_back((*it).second);
-    }
-
-    std::sort(temp.begin(), temp.end(), std::mem_fn(&Connection::Compare));
-    return temp; // NRVO should handle this
-}
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsBySourceSequenced(uint64_t source) const
-{
-    return GetConnectionsSequenced(source, ConnectionsBySource());
-}
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsBySourceSequenced(uint64_t src, const char* classname) const
-{
-    const char* arr[] = {classname};
-    return GetConnectionsBySourceSequenced(src, arr,1);
-}
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsBySourceSequenced(uint64_t source,
-        const char* const* classnames, size_t count) const
-{
-    return GetConnectionsSequenced(source, true, ConnectionsBySource(),classnames, count);
-}
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsByDestinationSequenced(uint64_t dest,
-        const char* classname) const
-{
-    const char* arr[] = {classname};
-    return GetConnectionsByDestinationSequenced(dest, arr,1);
-}
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsByDestinationSequenced(uint64_t dest) const
-{
-    return GetConnectionsSequenced(dest, ConnectionsByDestination());
-}
-
-// ------------------------------------------------------------------------------------------------
-std::vector<const Connection*> Document::GetConnectionsByDestinationSequenced(uint64_t dest,
-    const char* const* classnames, size_t count) const
-
-{
-    return GetConnectionsSequenced(dest, false, ConnectionsByDestination(),classnames, count);
-}
-
-// ------------------------------------------------------------------------------------------------
-Connection::Connection(uint64_t insertionOrder,  uint64_t src, uint64_t dest, const std::string& prop,
-        const Document& doc)
-
-: insertionOrder(insertionOrder)
-, prop(prop)
-, src(src)
-, dest(dest)
-, doc(doc)
-{
-    ai_assert(doc.Objects().find(src) != doc.Objects().end());
-    // dest may be 0 (root node)
-    ai_assert(!dest || doc.Objects().find(dest) != doc.Objects().end());
-}
-
-// ------------------------------------------------------------------------------------------------
-Connection::~Connection()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-LazyObject& Connection::LazySourceObject() const
-{
-    LazyObject* const lazy = doc.GetObject(src);
-    ai_assert(lazy);
-    return *lazy;
-}
-
-// ------------------------------------------------------------------------------------------------
-LazyObject& Connection::LazyDestinationObject() const
-{
-    LazyObject* const lazy = doc.GetObject(dest);
-    ai_assert(lazy);
-    return *lazy;
-}
-
-// ------------------------------------------------------------------------------------------------
-const Object* Connection::SourceObject() const
-{
-    LazyObject* const lazy = doc.GetObject(src);
-    ai_assert(lazy);
-    return lazy->Get();
-}
-
-// ------------------------------------------------------------------------------------------------
-const Object* Connection::DestinationObject() const
-{
-    LazyObject* const lazy = doc.GetObject(dest);
-    ai_assert(lazy);
-    return lazy->Get();
-}
-
-} // !FBX
-} // !Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXDocument.h b/libs/assimp/code/AssetLib/FBX/FBXDocument.h
deleted file mode 100644
index bac7e77..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXDocument.h
+++ /dev/null
@@ -1,1186 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXDocument.h
- *  @brief FBX DOM
- */
-#ifndef INCLUDED_AI_FBX_DOCUMENT_H
-#define INCLUDED_AI_FBX_DOCUMENT_H
-
-#include <numeric>
-#include <stdint.h>
-#include <assimp/mesh.h>
-#include "FBXProperties.h"
-#include "FBXParser.h"
-
-#define _AI_CONCAT(a,b)  a ## b
-#define  AI_CONCAT(a,b)  _AI_CONCAT(a,b)
-
-namespace Assimp {
-namespace FBX {
-
-class Parser;
-class Object;
-struct ImportSettings;
-
-class PropertyTable;
-class Document;
-class Material;
-class ShapeGeometry;
-class LineGeometry;
-class Geometry;
-
-class Video;
-
-class AnimationCurve;
-class AnimationCurveNode;
-class AnimationLayer;
-class AnimationStack;
-
-class BlendShapeChannel;
-class BlendShape;
-class Skin;
-class Cluster;
-
-
-/** Represents a delay-parsed FBX objects. Many objects in the scene
- *  are not needed by assimp, so it makes no sense to parse them
- *  upfront. */
-class LazyObject {
-public:
-    LazyObject(uint64_t id, const Element& element, const Document& doc);
-
-    ~LazyObject();
-
-    const Object* Get(bool dieOnError = false);
-
-    template <typename T>
-    const T* Get(bool dieOnError = false) {
-        const Object* const ob = Get(dieOnError);
-        return ob ? dynamic_cast<const T *>(ob) : nullptr;
-    }
-
-    uint64_t ID() const {
-        return id;
-    }
-
-    bool IsBeingConstructed() const {
-        return (flags & BEING_CONSTRUCTED) != 0;
-    }
-
-    bool FailedToConstruct() const {
-        return (flags & FAILED_TO_CONSTRUCT) != 0;
-    }
-
-    const Element& GetElement() const {
-        return element;
-    }
-
-    const Document& GetDocument() const {
-        return doc;
-    }
-
-private:
-    const Document& doc;
-    const Element& element;
-    std::unique_ptr<const Object> object;
-
-    const uint64_t id;
-
-    enum Flags {
-        BEING_CONSTRUCTED = 0x1,
-        FAILED_TO_CONSTRUCT = 0x2
-    };
-
-    unsigned int flags;
-};
-
-/** Base class for in-memory (DOM) representations of FBX objects */
-class Object {
-public:
-    Object(uint64_t id, const Element& element, const std::string& name);
-
-    virtual ~Object();
-
-    const Element& SourceElement() const {
-        return element;
-    }
-
-    const std::string& Name() const {
-        return name;
-    }
-
-    uint64_t ID() const {
-        return id;
-    }
-
-protected:
-    const Element& element;
-    const std::string name;
-    const uint64_t id;
-};
-
-/** DOM class for generic FBX NoteAttribute blocks. NoteAttribute's just hold a property table,
- *  fixed members are added by deriving classes. */
-class NodeAttribute : public Object {
-public:
-    NodeAttribute(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~NodeAttribute();
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-private:
-    std::shared_ptr<const PropertyTable> props;
-};
-
-/** DOM base class for FBX camera settings attached to a node */
-class CameraSwitcher : public NodeAttribute {
-public:
-    CameraSwitcher(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~CameraSwitcher();
-
-    int CameraID() const {
-        return cameraId;
-    }
-
-    const std::string& CameraName() const {
-        return cameraName;
-    }
-
-    const std::string& CameraIndexName() const {
-        return cameraIndexName;
-    }
-
-private:
-    int cameraId;
-    std::string cameraName;
-    std::string cameraIndexName;
-};
-
-#define fbx_stringize(a) #a
-
-#define fbx_simple_property(name, type, default_value) \
-    type name() const { \
-        return PropertyGet<type>(Props(), fbx_stringize(name), (default_value)); \
-    }
-
-// XXX improve logging
-#define fbx_simple_enum_property(name, type, default_value) \
-    type name() const { \
-        const int ival = PropertyGet<int>(Props(), fbx_stringize(name), static_cast<int>(default_value)); \
-        if (ival < 0 || ival >= AI_CONCAT(type, _MAX)) { \
-            ai_assert(static_cast<int>(default_value) >= 0); \
-            ai_assert(static_cast<int>(default_value) < AI_CONCAT(type, _MAX)); \
-            return static_cast<type>(default_value); \
-        } \
-        return static_cast<type>(ival); \
-}
-
-
-/** DOM base class for FBX cameras attached to a node */
-class Camera : public NodeAttribute {
-public:
-    Camera(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual  ~Camera();
-
-    fbx_simple_property(Position, aiVector3D, aiVector3D(0,0,0))
-    fbx_simple_property(UpVector, aiVector3D, aiVector3D(0,1,0))
-    fbx_simple_property(InterestPosition, aiVector3D, aiVector3D(0,0,0))
-
-    fbx_simple_property(AspectWidth, float, 1.0f)
-    fbx_simple_property(AspectHeight, float, 1.0f)
-    fbx_simple_property(FilmWidth, float, 1.0f)
-    fbx_simple_property(FilmHeight, float, 1.0f)
-
-    fbx_simple_property(NearPlane, float, 0.1f)
-    fbx_simple_property(FarPlane, float, 100.0f)
-
-    fbx_simple_property(FilmAspectRatio, float, 1.0f)
-    fbx_simple_property(ApertureMode, int, 0)
-
-    fbx_simple_property(FieldOfView, float, 1.0f)
-    fbx_simple_property(FocalLength, float, 1.0f)
-};
-
-/** DOM base class for FBX null markers attached to a node */
-class Null : public NodeAttribute {
-public:
-    Null(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-    virtual ~Null();
-};
-
-/** DOM base class for FBX limb node markers attached to a node */
-class LimbNode : public NodeAttribute {
-public:
-    LimbNode(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-    virtual ~LimbNode();
-};
-
-/** DOM base class for FBX lights attached to a node */
-class Light : public NodeAttribute {
-public:
-    Light(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-    virtual ~Light();
-
-    enum Type
-    {
-        Type_Point,
-        Type_Directional,
-        Type_Spot,
-        Type_Area,
-        Type_Volume,
-
-        Type_MAX // end-of-enum sentinel
-    };
-
-    enum Decay
-    {
-        Decay_None,
-        Decay_Linear,
-        Decay_Quadratic,
-        Decay_Cubic,
-
-        Decay_MAX // end-of-enum sentinel
-    };
-
-    fbx_simple_property(Color, aiVector3D, aiVector3D(1,1,1))
-    fbx_simple_enum_property(LightType, Type, 0)
-    fbx_simple_property(CastLightOnObject, bool, false)
-    fbx_simple_property(DrawVolumetricLight, bool, true)
-    fbx_simple_property(DrawGroundProjection, bool, true)
-    fbx_simple_property(DrawFrontFacingVolumetricLight, bool, false)
-    fbx_simple_property(Intensity, float, 100.0f)
-    fbx_simple_property(InnerAngle, float, 0.0f)
-    fbx_simple_property(OuterAngle, float, 45.0f)
-    fbx_simple_property(Fog, int, 50)
-    fbx_simple_enum_property(DecayType, Decay, 2)
-    fbx_simple_property(DecayStart, float, 1.0f)
-    fbx_simple_property(FileName, std::string, "")
-
-    fbx_simple_property(EnableNearAttenuation, bool, false)
-    fbx_simple_property(NearAttenuationStart, float, 0.0f)
-    fbx_simple_property(NearAttenuationEnd, float, 0.0f)
-    fbx_simple_property(EnableFarAttenuation, bool, false)
-    fbx_simple_property(FarAttenuationStart, float, 0.0f)
-    fbx_simple_property(FarAttenuationEnd, float, 0.0f)
-
-    fbx_simple_property(CastShadows, bool, true)
-    fbx_simple_property(ShadowColor, aiVector3D, aiVector3D(0,0,0))
-
-    fbx_simple_property(AreaLightShape, int, 0)
-
-    fbx_simple_property(LeftBarnDoor, float, 20.0f)
-    fbx_simple_property(RightBarnDoor, float, 20.0f)
-    fbx_simple_property(TopBarnDoor, float, 20.0f)
-    fbx_simple_property(BottomBarnDoor, float, 20.0f)
-    fbx_simple_property(EnableBarnDoor, bool, true)
-};
-
-/** DOM base class for FBX models (even though its semantics are more "node" than "model" */
-class Model : public Object {
-public:
-    enum RotOrder {
-        RotOrder_EulerXYZ = 0,
-        RotOrder_EulerXZY,
-        RotOrder_EulerYZX,
-        RotOrder_EulerYXZ,
-        RotOrder_EulerZXY,
-        RotOrder_EulerZYX,
-
-        RotOrder_SphericXYZ,
-
-        RotOrder_MAX // end-of-enum sentinel
-    };
-
-    enum TransformInheritance {
-        TransformInheritance_RrSs = 0,
-        TransformInheritance_RSrs,
-        TransformInheritance_Rrs,
-
-        TransformInheritance_MAX // end-of-enum sentinel
-    };
-
-    Model(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~Model();
-
-    fbx_simple_property(QuaternionInterpolate, int, 0)
-
-    fbx_simple_property(RotationOffset, aiVector3D, aiVector3D())
-    fbx_simple_property(RotationPivot, aiVector3D, aiVector3D())
-    fbx_simple_property(ScalingOffset, aiVector3D, aiVector3D())
-    fbx_simple_property(ScalingPivot, aiVector3D, aiVector3D())
-    fbx_simple_property(TranslationActive, bool, false)
-
-    fbx_simple_property(TranslationMin, aiVector3D, aiVector3D())
-    fbx_simple_property(TranslationMax, aiVector3D, aiVector3D())
-
-    fbx_simple_property(TranslationMinX, bool, false)
-    fbx_simple_property(TranslationMaxX, bool, false)
-    fbx_simple_property(TranslationMinY, bool, false)
-    fbx_simple_property(TranslationMaxY, bool, false)
-    fbx_simple_property(TranslationMinZ, bool, false)
-    fbx_simple_property(TranslationMaxZ, bool, false)
-
-    fbx_simple_enum_property(RotationOrder, RotOrder, 0)
-    fbx_simple_property(RotationSpaceForLimitOnly, bool, false)
-    fbx_simple_property(RotationStiffnessX, float, 0.0f)
-    fbx_simple_property(RotationStiffnessY, float, 0.0f)
-    fbx_simple_property(RotationStiffnessZ, float, 0.0f)
-    fbx_simple_property(AxisLen, float, 0.0f)
-
-    fbx_simple_property(PreRotation, aiVector3D, aiVector3D())
-    fbx_simple_property(PostRotation, aiVector3D, aiVector3D())
-    fbx_simple_property(RotationActive, bool, false)
-
-    fbx_simple_property(RotationMin, aiVector3D, aiVector3D())
-    fbx_simple_property(RotationMax, aiVector3D, aiVector3D())
-
-    fbx_simple_property(RotationMinX, bool, false)
-    fbx_simple_property(RotationMaxX, bool, false)
-    fbx_simple_property(RotationMinY, bool, false)
-    fbx_simple_property(RotationMaxY, bool, false)
-    fbx_simple_property(RotationMinZ, bool, false)
-    fbx_simple_property(RotationMaxZ, bool, false)
-    fbx_simple_enum_property(InheritType, TransformInheritance, 0)
-
-    fbx_simple_property(ScalingActive, bool, false)
-    fbx_simple_property(ScalingMin, aiVector3D, aiVector3D())
-    fbx_simple_property(ScalingMax, aiVector3D, aiVector3D(1.f,1.f,1.f))
-    fbx_simple_property(ScalingMinX, bool, false)
-    fbx_simple_property(ScalingMaxX, bool, false)
-    fbx_simple_property(ScalingMinY, bool, false)
-    fbx_simple_property(ScalingMaxY, bool, false)
-    fbx_simple_property(ScalingMinZ, bool, false)
-    fbx_simple_property(ScalingMaxZ, bool, false)
-
-    fbx_simple_property(GeometricTranslation, aiVector3D, aiVector3D())
-    fbx_simple_property(GeometricRotation, aiVector3D, aiVector3D())
-    fbx_simple_property(GeometricScaling, aiVector3D, aiVector3D(1.f, 1.f, 1.f))
-
-    fbx_simple_property(MinDampRangeX, float, 0.0f)
-    fbx_simple_property(MinDampRangeY, float, 0.0f)
-    fbx_simple_property(MinDampRangeZ, float, 0.0f)
-    fbx_simple_property(MaxDampRangeX, float, 0.0f)
-    fbx_simple_property(MaxDampRangeY, float, 0.0f)
-    fbx_simple_property(MaxDampRangeZ, float, 0.0f)
-
-    fbx_simple_property(MinDampStrengthX, float, 0.0f)
-    fbx_simple_property(MinDampStrengthY, float, 0.0f)
-    fbx_simple_property(MinDampStrengthZ, float, 0.0f)
-    fbx_simple_property(MaxDampStrengthX, float, 0.0f)
-    fbx_simple_property(MaxDampStrengthY, float, 0.0f)
-    fbx_simple_property(MaxDampStrengthZ, float, 0.0f)
-
-    fbx_simple_property(PreferredAngleX, float, 0.0f)
-    fbx_simple_property(PreferredAngleY, float, 0.0f)
-    fbx_simple_property(PreferredAngleZ, float, 0.0f)
-
-    fbx_simple_property(Show, bool, true)
-    fbx_simple_property(LODBox, bool, false)
-    fbx_simple_property(Freeze, bool, false)
-
-    const std::string& Shading() const {
-        return shading;
-    }
-
-    const std::string& Culling() const {
-        return culling;
-    }
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-    /** Get material links */
-    const std::vector<const Material*>& GetMaterials() const {
-        return materials;
-    }
-
-    /** Get geometry links */
-    const std::vector<const Geometry*>& GetGeometry() const {
-        return geometry;
-    }
-
-    /** Get node attachments */
-    const std::vector<const NodeAttribute*>& GetAttributes() const {
-        return attributes;
-    }
-
-    /** convenience method to check if the node has a Null node marker */
-    bool IsNull() const;
-
-private:
-    void ResolveLinks(const Element& element, const Document& doc);
-
-private:
-    std::vector<const Material*> materials;
-    std::vector<const Geometry*> geometry;
-    std::vector<const NodeAttribute*> attributes;
-
-    std::string shading;
-    std::string culling;
-    std::shared_ptr<const PropertyTable> props;
-};
-
-/** DOM class for generic FBX textures */
-class Texture : public Object {
-public:
-    Texture(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~Texture();
-
-    const std::string& Type() const {
-        return type;
-    }
-
-    const std::string& FileName() const {
-        return fileName;
-    }
-
-    const std::string& RelativeFilename() const {
-        return relativeFileName;
-    }
-
-    const std::string& AlphaSource() const {
-        return alphaSource;
-    }
-
-    const aiVector2D& UVTranslation() const {
-        return uvTrans;
-    }
-
-    const aiVector2D& UVScaling() const {
-        return uvScaling;
-    }
-
-    const ai_real &UVRotation() const {
-        return uvRotation;
-    }
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-    // return a 4-tuple
-    const unsigned int* Crop() const {
-        return crop;
-    }
-
-    const Video* Media() const {
-        return media;
-    }
-
-private:
-    aiVector2D uvTrans;
-    aiVector2D uvScaling;
-    ai_real    uvRotation;
-
-    std::string type;
-    std::string relativeFileName;
-    std::string fileName;
-    std::string alphaSource;
-    std::shared_ptr<const PropertyTable> props;
-
-    unsigned int crop[4];
-
-    const Video* media;
-};
-
-/** DOM class for layered FBX textures */
-class LayeredTexture : public Object {
-public:
-    LayeredTexture(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-    virtual ~LayeredTexture();
-
-    // Can only be called after construction of the layered texture object due to construction flag.
-    void fillTexture(const Document& doc);
-
-    enum BlendMode {
-        BlendMode_Translucent,
-        BlendMode_Additive,
-        BlendMode_Modulate,
-        BlendMode_Modulate2,
-        BlendMode_Over,
-        BlendMode_Normal,
-        BlendMode_Dissolve,
-        BlendMode_Darken,
-        BlendMode_ColorBurn,
-        BlendMode_LinearBurn,
-        BlendMode_DarkerColor,
-        BlendMode_Lighten,
-        BlendMode_Screen,
-        BlendMode_ColorDodge,
-        BlendMode_LinearDodge,
-        BlendMode_LighterColor,
-        BlendMode_SoftLight,
-        BlendMode_HardLight,
-        BlendMode_VividLight,
-        BlendMode_LinearLight,
-        BlendMode_PinLight,
-        BlendMode_HardMix,
-        BlendMode_Difference,
-        BlendMode_Exclusion,
-        BlendMode_Subtract,
-        BlendMode_Divide,
-        BlendMode_Hue,
-        BlendMode_Saturation,
-        BlendMode_Color,
-        BlendMode_Luminosity,
-        BlendMode_Overlay,
-        BlendMode_BlendModeCount
-    };
-
-    const Texture* getTexture(int index=0) const
-    {
-		return textures[index];
-
-    }
-	int textureCount() const {
-		return static_cast<int>(textures.size());
-	}
-    BlendMode GetBlendMode() const
-    {
-        return blendMode;
-    }
-    float Alpha()
-    {
-        return alpha;
-    }
-private:
-	std::vector<const Texture*> textures;
-    BlendMode blendMode;
-    float alpha;
-};
-
-typedef std::fbx_unordered_map<std::string, const Texture*> TextureMap;
-typedef std::fbx_unordered_map<std::string, const LayeredTexture*> LayeredTextureMap;
-
-
-/** DOM class for generic FBX videos */
-class Video : public Object {
-public:
-    Video(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~Video();
-
-    const std::string& Type() const {
-        return type;
-    }
-
-    const std::string& FileName() const {
-        return fileName;
-    }
-
-    const std::string& RelativeFilename() const {
-        return relativeFileName;
-    }
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-    const uint8_t* Content() const {
-        ai_assert(content);
-        return content;
-    }
-
-    uint64_t ContentLength() const {
-        return contentLength;
-    }
-
-    uint8_t* RelinquishContent() {
-        uint8_t* ptr = content;
-        content = 0;
-        return ptr;
-    }
-
-private:
-    std::string type;
-    std::string relativeFileName;
-    std::string fileName;
-    std::shared_ptr<const PropertyTable> props;
-
-    uint64_t contentLength;
-    uint8_t* content;
-};
-
-/** DOM class for generic FBX materials */
-class Material : public Object {
-public:
-    Material(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~Material();
-
-    const std::string& GetShadingModel() const {
-        return shading;
-    }
-
-    bool IsMultilayer() const {
-        return multilayer;
-    }
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-    const TextureMap& Textures() const {
-        return textures;
-    }
-
-    const LayeredTextureMap& LayeredTextures() const {
-        return layeredTextures;
-    }
-
-private:
-    std::string shading;
-    bool multilayer;
-    std::shared_ptr<const PropertyTable> props;
-
-    TextureMap textures;
-    LayeredTextureMap layeredTextures;
-};
-
-typedef std::vector<int64_t> KeyTimeList;
-typedef std::vector<float> KeyValueList;
-
-/** Represents a FBX animation curve (i.e. a 1-dimensional set of keyframes and values therefore) */
-class AnimationCurve : public Object {
-public:
-    AnimationCurve(uint64_t id, const Element& element, const std::string& name, const Document& doc);
-    virtual ~AnimationCurve();
-
-    /** get list of keyframe positions (time).
-     *  Invariant: |GetKeys()| > 0 */
-    const KeyTimeList& GetKeys() const {
-        return keys;
-    }
-
-    /** get list of keyframe values.
-      * Invariant: |GetKeys()| == |GetValues()| && |GetKeys()| > 0*/
-    const KeyValueList& GetValues() const {
-        return values;
-    }
-
-    const std::vector<float>& GetAttributes() const {
-        return attributes;
-    }
-
-    const std::vector<unsigned int>& GetFlags() const {
-        return flags;
-    }
-
-private:
-    KeyTimeList keys;
-    KeyValueList values;
-    std::vector<float> attributes;
-    std::vector<unsigned int> flags;
-};
-
-// property-name -> animation curve
-typedef std::map<std::string, const AnimationCurve*> AnimationCurveMap;
-
-/** Represents a FBX animation curve (i.e. a mapping from single animation curves to nodes) */
-class AnimationCurveNode : public Object {
-public:
-    /* the optional white list specifies a list of property names for which the caller
-    wants animations for. If the curve node does not match one of these, std::range_error
-    will be thrown. */
-    AnimationCurveNode(uint64_t id, const Element& element, const std::string& name, const Document& doc,
-            const char *const *target_prop_whitelist = nullptr, size_t whitelist_size = 0);
-
-    virtual ~AnimationCurveNode();
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-
-    const AnimationCurveMap& Curves() const;
-
-    /** Object the curve is assigned to, this can be nullptr if the
-     *  target object has no DOM representation or could not
-     *  be read for other reasons.*/
-    const Object* Target() const {
-        return target;
-    }
-
-    const Model* TargetAsModel() const {
-        return dynamic_cast<const Model*>(target);
-    }
-
-    const NodeAttribute* TargetAsNodeAttribute() const {
-        return dynamic_cast<const NodeAttribute*>(target);
-    }
-
-    /** Property of Target() that is being animated*/
-    const std::string& TargetProperty() const {
-        return prop;
-    }
-
-private:
-    const Object* target;
-    std::shared_ptr<const PropertyTable> props;
-    mutable AnimationCurveMap curves;
-
-    std::string prop;
-    const Document& doc;
-};
-
-typedef std::vector<const AnimationCurveNode*> AnimationCurveNodeList;
-
-/** Represents a FBX animation layer (i.e. a list of node animations) */
-class AnimationLayer : public Object {
-public:
-    AnimationLayer(uint64_t id, const Element& element, const std::string& name, const Document& doc);
-    virtual ~AnimationLayer();
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-    /* the optional white list specifies a list of property names for which the caller
-    wants animations for. Curves not matching this list will not be added to the
-    animation layer. */
-    AnimationCurveNodeList Nodes(const char* const * target_prop_whitelist = nullptr, size_t whitelist_size = 0) const;
-
-private:
-    std::shared_ptr<const PropertyTable> props;
-    const Document& doc;
-};
-
-typedef std::vector<const AnimationLayer*> AnimationLayerList;
-
-/** Represents a FBX animation stack (i.e. a list of animation layers) */
-class AnimationStack : public Object {
-public:
-    AnimationStack(uint64_t id, const Element& element, const std::string& name, const Document& doc);
-    virtual ~AnimationStack();
-
-    fbx_simple_property(LocalStart, int64_t, 0L)
-    fbx_simple_property(LocalStop, int64_t, 0L)
-    fbx_simple_property(ReferenceStart, int64_t, 0L)
-    fbx_simple_property(ReferenceStop, int64_t, 0L)
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-    const AnimationLayerList& Layers() const {
-        return layers;
-    }
-
-private:
-    std::shared_ptr<const PropertyTable> props;
-    AnimationLayerList layers;
-};
-
-
-/** DOM class for deformers */
-class Deformer : public Object {
-public:
-    Deformer(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-    virtual ~Deformer();
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-private:
-    std::shared_ptr<const PropertyTable> props;
-};
-
-typedef std::vector<float> WeightArray;
-typedef std::vector<unsigned int> WeightIndexArray;
-
-
-/** DOM class for BlendShapeChannel deformers */
-class BlendShapeChannel : public Deformer {
-public:
-    BlendShapeChannel(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~BlendShapeChannel();
-
-    float DeformPercent() const {
-        return percent;
-    }
-
-    const WeightArray& GetFullWeights() const {
-        return fullWeights;
-    }
-
-    const std::vector<const ShapeGeometry*>& GetShapeGeometries() const {
-        return shapeGeometries;
-    }
-
-private:
-    float percent;
-    WeightArray fullWeights;
-    std::vector<const ShapeGeometry*> shapeGeometries;
-};
-
-/** DOM class for BlendShape deformers */
-class BlendShape : public Deformer {
-public:
-    BlendShape(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~BlendShape();
-
-    const std::vector<const BlendShapeChannel*>& BlendShapeChannels() const {
-        return blendShapeChannels;
-    }
-
-private:
-    std::vector<const BlendShapeChannel*> blendShapeChannels;
-};
-
-/** DOM class for skin deformer clusters (aka sub-deformers) */
-class Cluster : public Deformer {
-public:
-    Cluster(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~Cluster();
-
-    /** get the list of deformer weights associated with this cluster.
-     *  Use #GetIndices() to get the associated vertices. Both arrays
-     *  have the same size (and may also be empty). */
-    const WeightArray& GetWeights() const {
-        return weights;
-    }
-
-    /** get indices into the vertex data of the geometry associated
-     *  with this cluster. Use #GetWeights() to get the associated weights.
-     *  Both arrays have the same size (and may also be empty). */
-    const WeightIndexArray& GetIndices() const {
-        return indices;
-    }
-
-    /** */
-    const aiMatrix4x4& Transform() const {
-        return transform;
-    }
-
-    const aiMatrix4x4& TransformLink() const {
-        return transformLink;
-    }
-
-    const Model* TargetNode() const {
-        return node;
-    }
-
-private:
-    WeightArray weights;
-    WeightIndexArray indices;
-
-    aiMatrix4x4 transform;
-    aiMatrix4x4 transformLink;
-
-    const Model* node;
-};
-
-/** DOM class for skin deformers */
-class Skin : public Deformer {
-public:
-    Skin(uint64_t id, const Element& element, const Document& doc, const std::string& name);
-
-    virtual ~Skin();
-
-    float DeformAccuracy() const {
-        return accuracy;
-    }
-
-    const std::vector<const Cluster*>& Clusters() const {
-        return clusters;
-    }
-
-private:
-    float accuracy;
-    std::vector<const Cluster*> clusters;
-};
-
-/** Represents a link between two FBX objects. */
-class Connection {
-public:
-    Connection(uint64_t insertionOrder,  uint64_t src, uint64_t dest, const std::string& prop, const Document& doc);
-
-    ~Connection();
-
-    // note: a connection ensures that the source and dest objects exist, but
-    // not that they have DOM representations, so the return value of one of
-    // these functions can still be nullptr.
-    const Object* SourceObject() const;
-    const Object* DestinationObject() const;
-
-    // these, however, are always guaranteed to be valid
-    LazyObject& LazySourceObject() const;
-    LazyObject& LazyDestinationObject() const;
-
-
-    /** return the name of the property the connection is attached to.
-      * this is an empty string for object to object (OO) connections. */
-    const std::string& PropertyName() const {
-        return prop;
-    }
-
-    uint64_t InsertionOrder() const {
-        return insertionOrder;
-    }
-
-    int CompareTo(const Connection* c) const {
-        ai_assert( nullptr != c );
-
-        // note: can't subtract because this would overflow uint64_t
-        if(InsertionOrder() > c->InsertionOrder()) {
-            return 1;
-        }
-        else if(InsertionOrder() < c->InsertionOrder()) {
-            return -1;
-        }
-        return 0;
-    }
-
-    bool Compare(const Connection* c) const {
-        ai_assert( nullptr != c );
-
-        return InsertionOrder() < c->InsertionOrder();
-    }
-
-public:
-    uint64_t insertionOrder;
-    const std::string prop;
-
-    uint64_t src, dest;
-    const Document& doc;
-};
-
-// XXX again, unique_ptr would be useful. shared_ptr is too
-// bloated since the objects have a well-defined single owner
-// during their entire lifetime (Document). FBX files have
-// up to many thousands of objects (most of which we never use),
-// so the memory overhead for them should be kept at a minimum.
-typedef std::fbx_unordered_map<uint64_t, LazyObject*> ObjectMap;
-typedef std::fbx_unordered_map<std::string, std::shared_ptr<const PropertyTable> > PropertyTemplateMap;
-
-typedef std::fbx_unordered_multimap<uint64_t, const Connection*> ConnectionMap;
-
-/** DOM class for global document settings, a single instance per document can
- *  be accessed via Document.Globals(). */
-class FileGlobalSettings {
-public:
-    FileGlobalSettings(const Document& doc, std::shared_ptr<const PropertyTable> props);
-
-    ~FileGlobalSettings();
-
-    const PropertyTable& Props() const {
-        ai_assert(props.get());
-        return *props.get();
-    }
-
-    const Document& GetDocument() const {
-        return doc;
-    }
-
-    fbx_simple_property(UpAxis, int, 1)
-    fbx_simple_property(UpAxisSign, int, 1)
-    fbx_simple_property(FrontAxis, int, 2)
-    fbx_simple_property(FrontAxisSign, int, 1)
-    fbx_simple_property(CoordAxis, int, 0)
-    fbx_simple_property(CoordAxisSign, int, 1)
-    fbx_simple_property(OriginalUpAxis, int, 0)
-    fbx_simple_property(OriginalUpAxisSign, int, 1)
-    fbx_simple_property(UnitScaleFactor, float, 1)
-    fbx_simple_property(OriginalUnitScaleFactor, float, 1)
-    fbx_simple_property(AmbientColor, aiVector3D, aiVector3D(0,0,0))
-    fbx_simple_property(DefaultCamera, std::string, "")
-
-
-    enum FrameRate {
-        FrameRate_DEFAULT = 0,
-        FrameRate_120 = 1,
-        FrameRate_100 = 2,
-        FrameRate_60 = 3,
-        FrameRate_50 = 4,
-        FrameRate_48 = 5,
-        FrameRate_30 = 6,
-        FrameRate_30_DROP = 7,
-        FrameRate_NTSC_DROP_FRAME = 8,
-        FrameRate_NTSC_FULL_FRAME = 9,
-        FrameRate_PAL = 10,
-        FrameRate_CINEMA = 11,
-        FrameRate_1000 = 12,
-        FrameRate_CINEMA_ND = 13,
-        FrameRate_CUSTOM = 14,
-
-        FrameRate_MAX// end-of-enum sentinel
-    };
-
-    fbx_simple_enum_property(TimeMode, FrameRate, FrameRate_DEFAULT)
-    fbx_simple_property(TimeSpanStart, uint64_t, 0L)
-    fbx_simple_property(TimeSpanStop, uint64_t, 0L)
-    fbx_simple_property(CustomFrameRate, float, -1.0f)
-
-private:
-    std::shared_ptr<const PropertyTable> props;
-    const Document& doc;
-};
-
-/** DOM root for a FBX file */
-class Document {
-public:
-    Document(const Parser& parser, const ImportSettings& settings);
-
-    ~Document();
-
-    LazyObject* GetObject(uint64_t id) const;
-
-    bool IsBinary() const {
-        return parser.IsBinary();
-    }
-
-    unsigned int FBXVersion() const {
-        return fbxVersion;
-    }
-
-    const std::string& Creator() const {
-        return creator;
-    }
-
-    // elements (in this order): Year, Month, Day, Hour, Second, Millisecond
-    const unsigned int* CreationTimeStamp() const {
-        return creationTimeStamp;
-    }
-
-    const FileGlobalSettings& GlobalSettings() const {
-        ai_assert(globals.get());
-        return *globals.get();
-    }
-
-    const PropertyTemplateMap& Templates() const {
-        return templates;
-    }
-
-    const ObjectMap& Objects() const {
-        return objects;
-    }
-
-    const ImportSettings& Settings() const {
-        return settings;
-    }
-
-    const ConnectionMap& ConnectionsBySource() const {
-        return src_connections;
-    }
-
-    const ConnectionMap& ConnectionsByDestination() const {
-        return dest_connections;
-    }
-
-    // note: the implicit rule in all DOM classes is to always resolve
-    // from destination to source (since the FBX object hierarchy is,
-    // with very few exceptions, a DAG, this avoids cycles). In all
-    // cases that may involve back-facing edges in the object graph,
-    // use LazyObject::IsBeingConstructed() to check.
-
-    std::vector<const Connection*> GetConnectionsBySourceSequenced(uint64_t source) const;
-    std::vector<const Connection*> GetConnectionsByDestinationSequenced(uint64_t dest) const;
-
-    std::vector<const Connection*> GetConnectionsBySourceSequenced(uint64_t source, const char* classname) const;
-    std::vector<const Connection*> GetConnectionsByDestinationSequenced(uint64_t dest, const char* classname) const;
-
-    std::vector<const Connection*> GetConnectionsBySourceSequenced(uint64_t source,
-        const char* const* classnames, size_t count) const;
-    std::vector<const Connection*> GetConnectionsByDestinationSequenced(uint64_t dest,
-        const char* const* classnames,
-        size_t count) const;
-
-    const std::vector<const AnimationStack*>& AnimationStacks() const;
-
-private:
-    std::vector<const Connection*> GetConnectionsSequenced(uint64_t id, const ConnectionMap&) const;
-    std::vector<const Connection*> GetConnectionsSequenced(uint64_t id, bool is_src,
-        const ConnectionMap&,
-        const char* const* classnames,
-        size_t count) const;
-    void ReadHeader();
-    void ReadObjects();
-    void ReadPropertyTemplates();
-    void ReadConnections();
-    void ReadGlobalSettings();
-
-private:
-    const ImportSettings& settings;
-
-    ObjectMap objects;
-    const Parser& parser;
-
-    PropertyTemplateMap templates;
-    ConnectionMap src_connections;
-    ConnectionMap dest_connections;
-
-    unsigned int fbxVersion;
-    std::string creator;
-    unsigned int creationTimeStamp[7];
-
-    std::vector<uint64_t> animationStacks;
-    mutable std::vector<const AnimationStack*> animationStacksResolved;
-
-    std::unique_ptr<FileGlobalSettings> globals;
-};
-
-} // Namespace FBX
-} // Namespace Assimp
-
-#endif // INCLUDED_AI_FBX_DOCUMENT_H
diff --git a/libs/assimp/code/AssetLib/FBX/FBXDocumentUtil.cpp b/libs/assimp/code/AssetLib/FBX/FBXDocumentUtil.cpp
deleted file mode 100644
index 68185e5..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXDocumentUtil.cpp
+++ /dev/null
@@ -1,135 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXDocumentUtil.cpp
- *  @brief Implementation of the FBX DOM utility functions declared in FBXDocumentUtil.h
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXParser.h"
-#include "FBXDocument.h"
-#include "FBXUtil.h"
-#include "FBXDocumentUtil.h"
-#include "FBXProperties.h"
-
-
-namespace Assimp {
-namespace FBX {
-namespace Util {
-
-// ------------------------------------------------------------------------------------------------
-// signal DOM construction error, this is always unrecoverable. Throws DeadlyImportError.
-void DOMError(const std::string& message, const Token& token)
-{
-    throw DeadlyImportError("FBX-DOM", Util::GetTokenText(&token), message);
-}
-
-// ------------------------------------------------------------------------------------------------
-void DOMError(const std::string& message, const Element* element /*= nullptr*/)
-{
-    if(element) {
-        DOMError(message,element->KeyToken());
-    }
-    throw DeadlyImportError("FBX-DOM ", message);
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// print warning, do return
-void DOMWarning(const std::string& message, const Token& token)
-{
-    if(DefaultLogger::get()) {
-        ASSIMP_LOG_WARN("FBX-DOM", Util::GetTokenText(&token), message);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void DOMWarning(const std::string& message, const Element* element /*= nullptr*/)
-{
-    if(element) {
-        DOMWarning(message,element->KeyToken());
-        return;
-    }
-    if(DefaultLogger::get()) {
-        ASSIMP_LOG_WARN("FBX-DOM: ", message);
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// fetch a property table and the corresponding property template
-std::shared_ptr<const PropertyTable> GetPropertyTable(const Document& doc,
-    const std::string& templateName,
-    const Element &element,
-    const Scope& sc,
-    bool no_warn /*= false*/)
-{
-    const Element* const Properties70 = sc["Properties70"];
-    std::shared_ptr<const PropertyTable> templateProps = std::shared_ptr<const PropertyTable>(
-            static_cast<const PropertyTable *>(nullptr));
-
-    if(templateName.length()) {
-        PropertyTemplateMap::const_iterator it = doc.Templates().find(templateName);
-        if(it != doc.Templates().end()) {
-            templateProps = (*it).second;
-        }
-    }
-
-    if(!Properties70 || !Properties70->Compound()) {
-        if(!no_warn) {
-            DOMWarning("property table (Properties70) not found",&element);
-        }
-        if(templateProps) {
-            return templateProps;
-        }
-        else {
-            return std::make_shared<const PropertyTable>();
-        }
-    }
-    return std::make_shared<const PropertyTable>(*Properties70,templateProps);
-}
-} // !Util
-} // !FBX
-} // !Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXDocumentUtil.h b/libs/assimp/code/AssetLib/FBX/FBXDocumentUtil.h
deleted file mode 100644
index 2d76ee0..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXDocumentUtil.h
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2020, assimp team
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXDocumentUtil.h
- *  @brief FBX internal utilities used by the DOM reading code
- */
-#ifndef INCLUDED_AI_FBX_DOCUMENT_UTIL_H
-#define INCLUDED_AI_FBX_DOCUMENT_UTIL_H
-
-#include <assimp/defs.h>
-#include <string>
-#include <memory>
-#include "FBXDocument.h"
-
-struct Token;
-struct Element;
-
-namespace Assimp {
-namespace FBX {
-namespace Util {
-
-/* DOM/Parse error reporting - does not return */
-AI_WONT_RETURN void DOMError(const std::string& message, const Token& token) AI_WONT_RETURN_SUFFIX;
-AI_WONT_RETURN void DOMError(const std::string& message, const Element* element = NULL) AI_WONT_RETURN_SUFFIX;
-
-// does return
-void DOMWarning(const std::string& message, const Token& token);
-void DOMWarning(const std::string& message, const Element* element = NULL);
-
-
-// fetch a property table and the corresponding property template
-std::shared_ptr<const PropertyTable> GetPropertyTable(const Document& doc,
-    const std::string& templateName,
-    const Element &element,
-    const Scope& sc,
-    bool no_warn = false);
-
-// ------------------------------------------------------------------------------------------------
-template <typename T>
-inline
-const T* ProcessSimpleConnection(const Connection& con,
-    bool is_object_property_conn,
-    const char* name,
-    const Element& element,
-    const char** propNameOut = nullptr)
-{
-    if (is_object_property_conn && !con.PropertyName().length()) {
-        DOMWarning("expected incoming " + std::string(name) +
-            " link to be an object-object connection, ignoring",
-            &element
-            );
-        return nullptr;
-    }
-    else if (!is_object_property_conn && con.PropertyName().length()) {
-        DOMWarning("expected incoming " + std::string(name) +
-            " link to be an object-property connection, ignoring",
-            &element
-            );
-        return nullptr;
-    }
-
-    if(is_object_property_conn && propNameOut) {
-        // note: this is ok, the return value of PropertyValue() is guaranteed to
-        // remain valid and unchanged as long as the document exists.
-        *propNameOut = con.PropertyName().c_str();
-    }
-
-    const Object* const ob = con.SourceObject();
-    if(!ob) {
-        DOMWarning("failed to read source object for incoming " + std::string(name) +
-            " link, ignoring",
-            &element);
-        return nullptr;
-    }
-
-    return dynamic_cast<const T*>(ob);
-}
-
-} //!Util
-} //!FBX
-} //!Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXExportNode.cpp b/libs/assimp/code/AssetLib/FBX/FBXExportNode.cpp
deleted file mode 100644
index 21c61b2..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXExportNode.cpp
+++ /dev/null
@@ -1,561 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-#ifndef ASSIMP_BUILD_NO_EXPORT
-#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#include "FBXExportNode.h"
-#include "FBXCommon.h"
-
-#include <assimp/StreamWriter.h> // StreamWriterLE
-#include <assimp/Exceptional.h> // DeadlyExportError
-#include <assimp/ai_assert.h>
-#include <assimp/StringUtils.h> // ai_snprintf
-
-#include <string>
-#include <ostream>
-#include <sstream> // ostringstream
-#include <memory> // shared_ptr
-
-namespace Assimp {
-// AddP70<type> helpers... there's no usable pattern here,
-// so all are defined as separate functions.
-// Even "animatable" properties are often completely different
-// from the standard (nonanimated) property definition,
-// so they are specified with an 'A' suffix.
-
-void FBX::Node::AddP70int(
-    const std::string& cur_name, int32_t value
-) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "int", "Integer", "", value);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70bool(
-    const std::string& cur_name, bool value
-) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "bool", "", "", int32_t(value));
-    AddChild(n);
-}
-
-void FBX::Node::AddP70double(
-        const std::string &cur_name, double value) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "double", "Number", "", value);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70numberA(
-        const std::string &cur_name, double value) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "Number", "", "A", value);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70color(
-        const std::string &cur_name, double r, double g, double b) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "ColorRGB", "Color", "", r, g, b);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70colorA(
-        const std::string &cur_name, double r, double g, double b) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "Color", "", "A", r, g, b);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70vector(
-        const std::string &cur_name, double x, double y, double z) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "Vector3D", "Vector", "", x, y, z);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70vectorA(
-        const std::string &cur_name, double x, double y, double z) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "Vector", "", "A", x, y, z);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70string(
-        const std::string &cur_name, const std::string &value) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "KString", "", "", value);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70enum(
-        const std::string &cur_name, int32_t value) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "enum", "", "", value);
-    AddChild(n);
-}
-
-void FBX::Node::AddP70time(
-        const std::string &cur_name, int64_t value) {
-    FBX::Node n("P");
-    n.AddProperties(cur_name, "KTime", "Time", "", value);
-    AddChild(n);
-}
-
-
-// public member functions for writing nodes to stream
-
-void FBX::Node::Dump(
-        const std::shared_ptr<Assimp::IOStream> &outfile,
-        bool binary, int indent) {
-    if (binary) {
-        Assimp::StreamWriterLE outstream(outfile);
-        DumpBinary(outstream);
-    } else {
-        std::ostringstream ss;
-        DumpAscii(ss, indent);
-        std::string s = ss.str();
-        outfile->Write(s.c_str(), s.size(), 1);
-    }
-}
-
-void FBX::Node::Dump(
-    Assimp::StreamWriterLE &outstream,
-    bool binary, int indent
-) {
-    if (binary) {
-        DumpBinary(outstream);
-    } else {
-        std::ostringstream ss;
-        DumpAscii(ss, indent);
-        outstream.PutString(ss.str());
-    }
-}
-
-
-// public member functions for low-level writing
-
-void FBX::Node::Begin(
-    Assimp::StreamWriterLE &s,
-    bool binary, int indent
-) {
-    if (binary) {
-        BeginBinary(s);
-    } else {
-        // assume we're at the correct place to start already
-        (void)indent;
-        std::ostringstream ss;
-        BeginAscii(ss, indent);
-        s.PutString(ss.str());
-    }
-}
-
-void FBX::Node::DumpProperties(
-    Assimp::StreamWriterLE& s,
-    bool binary, int indent
-) {
-    if (binary) {
-        DumpPropertiesBinary(s);
-    } else {
-        std::ostringstream ss;
-        DumpPropertiesAscii(ss, indent);
-        s.PutString(ss.str());
-    }
-}
-
-void FBX::Node::EndProperties(
-    Assimp::StreamWriterLE &s,
-    bool binary, int indent
-) {
-    EndProperties(s, binary, indent, properties.size());
-}
-
-void FBX::Node::EndProperties(
-    Assimp::StreamWriterLE &s,
-    bool binary, int indent,
-    size_t num_properties
-) {
-    if (binary) {
-        EndPropertiesBinary(s, num_properties);
-    } else {
-        // nothing to do
-        (void)indent;
-    }
-}
-
-void FBX::Node::BeginChildren(
-    Assimp::StreamWriterLE &s,
-    bool binary, int indent
-) {
-    if (binary) {
-        // nothing to do
-    } else {
-        std::ostringstream ss;
-        BeginChildrenAscii(ss, indent);
-        s.PutString(ss.str());
-    }
-}
-
-void FBX::Node::DumpChildren(
-    Assimp::StreamWriterLE& s,
-    bool binary, int indent
-) {
-    if (binary) {
-        DumpChildrenBinary(s);
-    } else {
-        std::ostringstream ss;
-        DumpChildrenAscii(ss, indent);
-        if (ss.tellp() > 0)
-            s.PutString(ss.str());
-    }
-}
-
-void FBX::Node::End(
-    Assimp::StreamWriterLE &s,
-    bool binary, int indent,
-    bool has_children
-) {
-    if (binary) {
-        EndBinary(s, has_children);
-    } else {
-        std::ostringstream ss;
-        EndAscii(ss, indent, has_children);
-        if (ss.tellp() > 0)
-            s.PutString(ss.str());
-    }
-}
-
-
-// public member functions for writing to binary fbx
-
-void FBX::Node::DumpBinary(Assimp::StreamWriterLE &s)
-{
-    // write header section (with placeholders for some things)
-    BeginBinary(s);
-
-    // write properties
-    DumpPropertiesBinary(s);
-
-    // go back and fill in property related placeholders
-    EndPropertiesBinary(s, properties.size());
-
-    // write children
-    DumpChildrenBinary(s);
-
-    // finish, filling in end offset placeholder
-    EndBinary(s, force_has_children || !children.empty());
-}
-
-
-// public member functions for writing to ascii fbx
-
-void FBX::Node::DumpAscii(std::ostream &s, int indent)
-{
-    // write name
-    BeginAscii(s, indent);
-
-    // write properties
-    DumpPropertiesAscii(s, indent);
-
-    if (force_has_children || !children.empty()) {
-        // begin children (with a '{')
-        BeginChildrenAscii(s, indent + 1);
-        // write children
-        DumpChildrenAscii(s, indent + 1);
-    }
-
-    // finish (also closing the children bracket '}')
-    EndAscii(s, indent, force_has_children || !children.empty());
-}
-
-
-// private member functions for low-level writing to fbx
-
-void FBX::Node::BeginBinary(Assimp::StreamWriterLE &s)
-{
-    // remember start pos so we can come back and write the end pos
-    this->start_pos = s.Tell();
-
-    // placeholders for end pos and property section info
-    s.PutU8(0); // end pos
-    s.PutU8(0); // number of properties
-    s.PutU8(0); // total property section length
-
-    // node name
-    s.PutU1(uint8_t(name.size())); // length of node name
-    s.PutString(name); // node name as raw bytes
-
-    // property data comes after here
-    this->property_start = s.Tell();
-}
-
-void FBX::Node::DumpPropertiesBinary(Assimp::StreamWriterLE& s)
-{
-    for (auto &p : properties) {
-        p.DumpBinary(s);
-    }
-}
-
-void FBX::Node::EndPropertiesBinary(
-    Assimp::StreamWriterLE &s,
-    size_t num_properties
-) {
-    if (num_properties == 0) { return; }
-    size_t pos = s.Tell();
-    ai_assert(pos > property_start);
-    size_t property_section_size = pos - property_start;
-    s.Seek(start_pos + 8); // 8 bytes of uint64_t of end_pos
-    s.PutU8(num_properties);
-    s.PutU8(property_section_size);
-    s.Seek(pos);
-}
-
-void FBX::Node::DumpChildrenBinary(Assimp::StreamWriterLE& s)
-{
-    for (FBX::Node& child : children) {
-        child.DumpBinary(s);
-    }
-}
-
-void FBX::Node::EndBinary(
-    Assimp::StreamWriterLE &s,
-    bool has_children
-) {
-    // if there were children, add a null record
-    if (has_children) { s.PutString(Assimp::FBX::NULL_RECORD); }
-
-    // now go back and write initial pos
-    this->end_pos = s.Tell();
-    s.Seek(start_pos);
-    s.PutU8(end_pos);
-    s.Seek(end_pos);
-}
-
-
-void FBX::Node::BeginAscii(std::ostream& s, int indent)
-{
-    s << '\n';
-    for (int i = 0; i < indent; ++i) { s << '\t'; }
-    s << name << ": ";
-}
-
-void FBX::Node::DumpPropertiesAscii(std::ostream &s, int indent)
-{
-    for (size_t i = 0; i < properties.size(); ++i) {
-        if (i > 0) { s << ", "; }
-        properties[i].DumpAscii(s, indent);
-    }
-}
-
-void FBX::Node::BeginChildrenAscii(std::ostream& s, int indent)
-{
-    // only call this if there are actually children
-    s << " {";
-    (void)indent;
-}
-
-void FBX::Node::DumpChildrenAscii(std::ostream& s, int indent)
-{
-    // children will need a lot of padding and corralling
-    if (children.size() || force_has_children) {
-        for (size_t i = 0; i < children.size(); ++i) {
-            // no compression in ascii files, so skip this node if it exists
-            if (children[i].name == "EncryptionType") { continue; }
-            // the child can dump itself
-            children[i].DumpAscii(s, indent);
-        }
-    }
-}
-
-void FBX::Node::EndAscii(std::ostream& s, int indent, bool has_children)
-{
-    if (!has_children) { return; } // nothing to do
-    s << '\n';
-    for (int i = 0; i < indent; ++i) { s << '\t'; }
-    s << "}";
-}
-
-// private helpers for static member functions
-
-// ascii property node from vector of doubles
-void FBX::Node::WritePropertyNodeAscii(
-    const std::string& name,
-    const std::vector<double>& v,
-    Assimp::StreamWriterLE& s,
-    int indent
-){
-    char buffer[32];
-    FBX::Node node(name);
-    node.Begin(s, false, indent);
-    std::string vsize = ai_to_string(v.size());
-    // *<size> {
-    s.PutChar('*'); s.PutString(vsize); s.PutString(" {\n");
-    // indent + 1
-    for (int i = 0; i < indent + 1; ++i) { s.PutChar('\t'); }
-    // a: value,value,value,...
-    s.PutString("a: ");
-    int count = 0;
-    for (size_t i = 0; i < v.size(); ++i) {
-        if (i > 0) { s.PutChar(','); }
-        int len = ai_snprintf(buffer, sizeof(buffer), "%f", v[i]);
-        count += len;
-        if (count > 2048) { s.PutChar('\n'); count = 0; }
-        if (len < 0 || len > 31) {
-            // this should never happen
-            throw DeadlyExportError("failed to convert double to string");
-        }
-        for (int j = 0; j < len; ++j) { s.PutChar(buffer[j]); }
-    }
-    // }
-    s.PutChar('\n');
-    for (int i = 0; i < indent; ++i) { s.PutChar('\t'); }
-    s.PutChar('}'); s.PutChar(' ');
-    node.End(s, false, indent, false);
-}
-
-// ascii property node from vector of int32_t
-void FBX::Node::WritePropertyNodeAscii(
-    const std::string& name,
-    const std::vector<int32_t>& v,
-    Assimp::StreamWriterLE& s,
-    int indent
-){
-    char buffer[32];
-    FBX::Node node(name);
-    node.Begin(s, false, indent);
-    std::string vsize = ai_to_string(v.size());
-    // *<size> {
-    s.PutChar('*'); s.PutString(vsize); s.PutString(" {\n");
-    // indent + 1
-    for (int i = 0; i < indent + 1; ++i) { s.PutChar('\t'); }
-    // a: value,value,value,...
-    s.PutString("a: ");
-    int count = 0;
-    for (size_t i = 0; i < v.size(); ++i) {
-        if (i > 0) { s.PutChar(','); }
-        int len = ai_snprintf(buffer, sizeof(buffer), "%d", v[i]);
-        count += len;
-        if (count > 2048) { s.PutChar('\n'); count = 0; }
-        if (len < 0 || len > 31) {
-            // this should never happen
-            throw DeadlyExportError("failed to convert double to string");
-        }
-        for (int j = 0; j < len; ++j) { s.PutChar(buffer[j]); }
-    }
-    // }
-    s.PutChar('\n');
-    for (int i = 0; i < indent; ++i) { s.PutChar('\t'); }
-    s.PutChar('}'); s.PutChar(' ');
-    node.End(s, false, indent, false);
-}
-
-// binary property node from vector of doubles
-// TODO: optional zip compression!
-void FBX::Node::WritePropertyNodeBinary(
-    const std::string& name,
-    const std::vector<double>& v,
-    Assimp::StreamWriterLE& s
-){
-    FBX::Node node(name);
-    node.BeginBinary(s);
-    s.PutU1('d');
-    s.PutU4(uint32_t(v.size())); // number of elements
-    s.PutU4(0); // no encoding (1 would be zip-compressed)
-    s.PutU4(uint32_t(v.size()) * 8); // data size
-    for (auto it = v.begin(); it != v.end(); ++it) { s.PutF8(*it); }
-    node.EndPropertiesBinary(s, 1);
-    node.EndBinary(s, false);
-}
-
-// binary property node from vector of int32_t
-// TODO: optional zip compression!
-void FBX::Node::WritePropertyNodeBinary(
-    const std::string& name,
-    const std::vector<int32_t>& v,
-    Assimp::StreamWriterLE& s
-){
-    FBX::Node node(name);
-    node.BeginBinary(s);
-    s.PutU1('i');
-    s.PutU4(uint32_t(v.size())); // number of elements
-    s.PutU4(0); // no encoding (1 would be zip-compressed)
-    s.PutU4(uint32_t(v.size()) * 4); // data size
-    for (auto it = v.begin(); it != v.end(); ++it) { s.PutI4(*it); }
-    node.EndPropertiesBinary(s, 1);
-    node.EndBinary(s, false);
-}
-
-// public static member functions
-
-// convenience function to create and write a property node,
-// holding a single property which is an array of values.
-// does not copy the data, so is efficient for large arrays.
-void FBX::Node::WritePropertyNode(
-    const std::string& name,
-    const std::vector<double>& v,
-    Assimp::StreamWriterLE& s,
-    bool binary, int indent
-){
-    if (binary) {
-        FBX::Node::WritePropertyNodeBinary(name, v, s);
-    } else {
-        FBX::Node::WritePropertyNodeAscii(name, v, s, indent);
-    }
-}
-
-// convenience function to create and write a property node,
-// holding a single property which is an array of values.
-// does not copy the data, so is efficient for large arrays.
-void FBX::Node::WritePropertyNode(
-    const std::string& name,
-    const std::vector<int32_t>& v,
-    Assimp::StreamWriterLE& s,
-    bool binary, int indent
-){
-    if (binary) {
-        FBX::Node::WritePropertyNodeBinary(name, v, s);
-    } else {
-        FBX::Node::WritePropertyNodeAscii(name, v, s, indent);
-    }
-}
-}
-#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
-#endif // ASSIMP_BUILD_NO_EXPORT
diff --git a/libs/assimp/code/AssetLib/FBX/FBXExportNode.h b/libs/assimp/code/AssetLib/FBX/FBXExportNode.h
deleted file mode 100644
index c6c4549..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXExportNode.h
+++ /dev/null
@@ -1,270 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file FBXExportNode.h
-* Declares the FBX::Node helper class for fbx export.
-*/
-#ifndef AI_FBXEXPORTNODE_H_INC
-#define AI_FBXEXPORTNODE_H_INC
-
-#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#include "FBXExportProperty.h"
-
-#include <assimp/StreamWriter.h> // StreamWriterLE
-
-#include <string>
-#include <vector>
-
-namespace Assimp {
-namespace FBX {
-    class Node;
-}
-
-class FBX::Node {
-public:
-    // TODO: accessors
-    std::string name; // node name
-    std::vector<FBX::FBXExportProperty> properties; // node properties
-    std::vector<FBX::Node> children; // child nodes
-
-    // some nodes always pretend they have children...
-    bool force_has_children = false;
-
-public: // constructors
-    /// The default class constructor.
-    Node() = default;
-
-    /// The class constructor with the name.
-    Node(const std::string& n)
-    : name(n)
-    , properties()
-    , children()
-    , force_has_children( false ) {
-        // empty
-    }
-
-    // convenience template to construct with properties directly
-    template <typename... More>
-    Node(const std::string& n, const More... more)
-    : name(n)
-    , properties()
-    , children()
-    , force_has_children(false) {
-        AddProperties(more...);
-    }
-
-public: // functions to add properties or children
-    // add a single property to the node
-    template <typename T>
-    void AddProperty(T value) {
-        properties.emplace_back(value);
-    }
-
-    // convenience function to add multiple properties at once
-    template <typename T, typename... More>
-    void AddProperties(T value, More... more) {
-        properties.emplace_back(value);
-        AddProperties(more...);
-    }
-    void AddProperties() {}
-
-    // add a child node directly
-    void AddChild(const Node& node) { children.push_back(node); }
-
-    // convenience function to add a child node with a single property
-    template <typename... More>
-    void AddChild(
-        const std::string& name,
-        More... more
-    ) {
-        FBX::Node c(name);
-        c.AddProperties(more...);
-        children.push_back(c);
-    }
-
-public: // support specifically for dealing with Properties70 nodes
-
-    // it really is simpler to make these all separate functions.
-    // the versions with 'A' suffixes are for animatable properties.
-    // those often follow a completely different format internally in FBX.
-    void AddP70int(const std::string& name, int32_t value);
-    void AddP70bool(const std::string& name, bool value);
-    void AddP70double(const std::string& name, double value);
-    void AddP70numberA(const std::string& name, double value);
-    void AddP70color(const std::string& name, double r, double g, double b);
-    void AddP70colorA(const std::string& name, double r, double g, double b);
-    void AddP70vector(const std::string& name, double x, double y, double z);
-    void AddP70vectorA(const std::string& name, double x, double y, double z);
-    void AddP70string(const std::string& name, const std::string& value);
-    void AddP70enum(const std::string& name, int32_t value);
-    void AddP70time(const std::string& name, int64_t value);
-
-    // template for custom P70 nodes.
-    // anything that doesn't fit in the above can be created manually.
-    template <typename... More>
-    void AddP70(
-        const std::string& name,
-        const std::string& type,
-        const std::string& type2,
-        const std::string& flags,
-        More... more
-    ) {
-        Node n("P");
-        n.AddProperties(name, type, type2, flags, more...);
-        AddChild(n);
-    }
-
-public: // member functions for writing data to a file or stream
-
-    // write the full node to the given file or stream
-    void Dump(
-            const std::shared_ptr<Assimp::IOStream> &outfile,
-            bool binary, int indent);
-    void Dump(Assimp::StreamWriterLE &s, bool binary, int indent);
-
-    // these other functions are for writing data piece by piece.
-    // they must be used carefully.
-    // for usage examples see FBXExporter.cpp.
-    void Begin(Assimp::StreamWriterLE &s, bool binary, int indent);
-    void DumpProperties(Assimp::StreamWriterLE& s, bool binary, int indent);
-    void EndProperties(Assimp::StreamWriterLE &s, bool binary, int indent);
-    void EndProperties(
-        Assimp::StreamWriterLE &s, bool binary, int indent,
-        size_t num_properties
-    );
-    void BeginChildren(Assimp::StreamWriterLE &s, bool binary, int indent);
-    void DumpChildren(Assimp::StreamWriterLE& s, bool binary, int indent);
-    void End(
-        Assimp::StreamWriterLE &s, bool binary, int indent,
-        bool has_children
-    );
-
-private: // internal functions used for writing
-
-    void DumpBinary(Assimp::StreamWriterLE &s);
-    void DumpAscii(Assimp::StreamWriterLE &s, int indent);
-    void DumpAscii(std::ostream &s, int indent);
-
-    void BeginBinary(Assimp::StreamWriterLE &s);
-    void DumpPropertiesBinary(Assimp::StreamWriterLE& s);
-    void EndPropertiesBinary(Assimp::StreamWriterLE &s);
-    void EndPropertiesBinary(Assimp::StreamWriterLE &s, size_t num_properties);
-    void DumpChildrenBinary(Assimp::StreamWriterLE& s);
-    void EndBinary(Assimp::StreamWriterLE &s, bool has_children);
-
-    void BeginAscii(std::ostream &s, int indent);
-    void DumpPropertiesAscii(std::ostream &s, int indent);
-    void BeginChildrenAscii(std::ostream &s, int indent);
-    void DumpChildrenAscii(std::ostream &s, int indent);
-    void EndAscii(std::ostream &s, int indent, bool has_children);
-
-private: // data used for binary dumps
-    size_t start_pos; // starting position in stream
-    size_t end_pos; // ending position in stream
-    size_t property_start; // starting position of property section
-
-public: // static member functions
-
-    // convenience function to create a node with a single property,
-    // and write it to the stream.
-    template <typename T>
-    static void WritePropertyNode(
-        const std::string& name,
-        const T value,
-        Assimp::StreamWriterLE& s,
-        bool binary, int indent
-    ) {
-        FBX::FBXExportProperty p(value);
-        FBX::Node node(name, p);
-        node.Dump(s, binary, indent);
-    }
-
-    // convenience function to create and write a property node,
-    // holding a single property which is an array of values.
-    // does not copy the data, so is efficient for large arrays.
-    static void WritePropertyNode(
-        const std::string& name,
-        const std::vector<double>& v,
-        Assimp::StreamWriterLE& s,
-        bool binary, int indent
-    );
-
-    // convenience function to create and write a property node,
-    // holding a single property which is an array of values.
-    // does not copy the data, so is efficient for large arrays.
-    static void WritePropertyNode(
-        const std::string& name,
-        const std::vector<int32_t>& v,
-        Assimp::StreamWriterLE& s,
-        bool binary, int indent
-    );
-
-private: // static helper functions
-    static void WritePropertyNodeAscii(
-        const std::string& name,
-        const std::vector<double>& v,
-        Assimp::StreamWriterLE& s,
-        int indent
-    );
-    static void WritePropertyNodeAscii(
-        const std::string& name,
-        const std::vector<int32_t>& v,
-        Assimp::StreamWriterLE& s,
-        int indent
-    );
-    static void WritePropertyNodeBinary(
-        const std::string& name,
-        const std::vector<double>& v,
-        Assimp::StreamWriterLE& s
-    );
-    static void WritePropertyNodeBinary(
-        const std::string& name,
-        const std::vector<int32_t>& v,
-        Assimp::StreamWriterLE& s
-    );
-
-};
-}
-
-#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#endif // AI_FBXEXPORTNODE_H_INC
diff --git a/libs/assimp/code/AssetLib/FBX/FBXExportProperty.cpp b/libs/assimp/code/AssetLib/FBX/FBXExportProperty.cpp
deleted file mode 100644
index 3216d7d..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXExportProperty.cpp
+++ /dev/null
@@ -1,385 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-#ifndef ASSIMP_BUILD_NO_EXPORT
-#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#include "FBXExportProperty.h"
-
-#include <assimp/StreamWriter.h> // StreamWriterLE
-#include <assimp/Exceptional.h> // DeadlyExportError
-
-#include <string>
-#include <vector>
-#include <ostream>
-#include <locale>
-#include <sstream> // ostringstream
-
-namespace Assimp {
-namespace FBX {
-
-// constructors for single element properties
-
-FBXExportProperty::FBXExportProperty(bool v)
-: type('C')
-, data(1, uint8_t(v)) {}
-
-FBXExportProperty::FBXExportProperty(int16_t v)
-: type('Y')
-, data(2) {
-    uint8_t* d = data.data();
-    (reinterpret_cast<int16_t*>(d))[0] = v;
-}
-
-FBXExportProperty::FBXExportProperty(int32_t v)
-: type('I')
-, data(4) {
-    uint8_t* d = data.data();
-    (reinterpret_cast<int32_t*>(d))[0] = v;
-}
-
-FBXExportProperty::FBXExportProperty(float v)
-: type('F')
-, data(4) {
-    uint8_t* d = data.data();
-    (reinterpret_cast<float*>(d))[0] = v;
-}
-
-FBXExportProperty::FBXExportProperty(double v)
-: type('D')
-, data(8) {
-    uint8_t* d = data.data();
-    (reinterpret_cast<double*>(d))[0] = v;
-}
-
-FBXExportProperty::FBXExportProperty(int64_t v)
-: type('L')
-, data(8) {
-    uint8_t* d = data.data();
-    (reinterpret_cast<int64_t*>(d))[0] = v;
-}
-
-// constructors for array-type properties
-
-FBXExportProperty::FBXExportProperty(const char* c, bool raw)
-: FBXExportProperty(std::string(c), raw) {
-    // empty
-}
-
-// strings can either be saved as "raw" (R) data, or "string" (S) data
-FBXExportProperty::FBXExportProperty(const std::string& s, bool raw)
-: type(raw ? 'R' : 'S')
-, data(s.size()) {
-    for (size_t i = 0; i < s.size(); ++i) {
-        data[i] = uint8_t(s[i]);
-    }
-}
-
-FBXExportProperty::FBXExportProperty(const std::vector<uint8_t>& r)
-: type('R')
-, data(r) {
-    // empty
-}
-
-FBXExportProperty::FBXExportProperty(const std::vector<int32_t>& va)
-: type('i')
-, data(4 * va.size() ) {
-    int32_t* d = reinterpret_cast<int32_t*>(data.data());
-    for (size_t i = 0; i < va.size(); ++i) {
-        d[i] = va[i];
-    }
-}
-
-FBXExportProperty::FBXExportProperty(const std::vector<int64_t>& va)
-: type('l')
-, data(8 * va.size()) {
-    int64_t* d = reinterpret_cast<int64_t*>(data.data());
-    for (size_t i = 0; i < va.size(); ++i) {
-        d[i] = va[i];
-    }
-}
-
-FBXExportProperty::FBXExportProperty(const std::vector<float>& va)
-: type('f')
-, data(4 * va.size()) {
-    float* d = reinterpret_cast<float*>(data.data());
-    for (size_t i = 0; i < va.size(); ++i) {
-        d[i] = va[i];
-    }
-}
-
-FBXExportProperty::FBXExportProperty(const std::vector<double>& va)
-: type('d')
-, data(8 * va.size()) {
-    double* d = reinterpret_cast<double*>(data.data());
-    for (size_t i = 0; i < va.size(); ++i) {
-        d[i] = va[i];
-    }
-}
-
-FBXExportProperty::FBXExportProperty(const aiMatrix4x4& vm)
-: type('d')
-, data(8 * 16) {
-    double* d = reinterpret_cast<double*>(data.data());
-    for (unsigned int c = 0; c < 4; ++c) {
-        for (unsigned int r = 0; r < 4; ++r) {
-            d[4 * c + r] = vm[r][c];
-        }
-    }
-}
-
-// public member functions
-
-size_t FBXExportProperty::size() {
-    switch (type) {
-        case 'C':
-        case 'Y':
-        case 'I':
-        case 'F':
-        case 'D':
-        case 'L':
-            return data.size() + 1;
-        case 'S':
-        case 'R':
-            return data.size() + 5;
-        case 'i':
-        case 'd':
-            return data.size() + 13;
-        default:
-            throw DeadlyExportError("Requested size on property of unknown type");
-    }
-}
-
-void FBXExportProperty::DumpBinary(Assimp::StreamWriterLE& s) {
-    s.PutU1(type);
-    uint8_t* d = data.data();
-    size_t N;
-    switch (type) {
-        case 'C': s.PutU1(*(reinterpret_cast<uint8_t*>(d))); return;
-        case 'Y': s.PutI2(*(reinterpret_cast<int16_t*>(d))); return;
-        case 'I': s.PutI4(*(reinterpret_cast<int32_t*>(d))); return;
-        case 'F': s.PutF4(*(reinterpret_cast<float*>(d))); return;
-        case 'D': s.PutF8(*(reinterpret_cast<double*>(d))); return;
-        case 'L': s.PutI8(*(reinterpret_cast<int64_t*>(d))); return;
-        case 'S':
-        case 'R':
-            s.PutU4(uint32_t(data.size()));
-            for (size_t i = 0; i < data.size(); ++i) { s.PutU1(data[i]); }
-            return;
-        case 'i':
-            N = data.size() / 4;
-            s.PutU4(uint32_t(N)); // number of elements
-            s.PutU4(0); // no encoding (1 would be zip-compressed)
-            // TODO: compress if large?
-            s.PutU4(uint32_t(data.size())); // data size
-            for (size_t i = 0; i < N; ++i) {
-                s.PutI4((reinterpret_cast<int32_t*>(d))[i]);
-            }
-            return;
-        case 'l':
-            N = data.size() / 8;
-            s.PutU4(uint32_t(N)); // number of elements
-            s.PutU4(0); // no encoding (1 would be zip-compressed)
-            // TODO: compress if large?
-            s.PutU4(uint32_t(data.size())); // data size
-            for (size_t i = 0; i < N; ++i) {
-                s.PutI8((reinterpret_cast<int64_t*>(d))[i]);
-            }
-            return;
-        case 'f':
-            N = data.size() / 4;
-            s.PutU4(uint32_t(N)); // number of elements
-            s.PutU4(0); // no encoding (1 would be zip-compressed)
-            // TODO: compress if large?
-            s.PutU4(uint32_t(data.size())); // data size
-            for (size_t i = 0; i < N; ++i) {
-                s.PutF4((reinterpret_cast<float*>(d))[i]);
-            }
-            return;
-        case 'd':
-            N = data.size() / 8;
-            s.PutU4(uint32_t(N)); // number of elements
-            s.PutU4(0); // no encoding (1 would be zip-compressed)
-            // TODO: compress if large?
-            s.PutU4(uint32_t(data.size())); // data size
-            for (size_t i = 0; i < N; ++i) {
-                s.PutF8((reinterpret_cast<double*>(d))[i]);
-            }
-            return;
-        default:
-            std::ostringstream err;
-            err << "Tried to dump property with invalid type '";
-            err << type << "'!";
-            throw DeadlyExportError(err.str());
-    }
-}
-
-void FBXExportProperty::DumpAscii(Assimp::StreamWriterLE& outstream, int indent) {
-    std::ostringstream ss;
-    ss.imbue(std::locale::classic());
-    ss.precision(15); // this seems to match official FBX SDK exports
-    DumpAscii(ss, indent);
-    outstream.PutString(ss.str());
-}
-
-void FBXExportProperty::DumpAscii(std::ostream& s, int indent) {
-    // no writing type... or anything. just shove it into the stream.
-    uint8_t* d = data.data();
-    size_t N;
-    size_t swap = data.size();
-    size_t count = 0;
-    switch (type) {
-    case 'C':
-        if (*(reinterpret_cast<uint8_t*>(d))) { s << 'T'; }
-        else { s << 'F'; }
-        return;
-    case 'Y': s << *(reinterpret_cast<int16_t*>(d)); return;
-    case 'I': s << *(reinterpret_cast<int32_t*>(d)); return;
-    case 'F': s << *(reinterpret_cast<float*>(d)); return;
-    case 'D': s << *(reinterpret_cast<double*>(d)); return;
-    case 'L': s << *(reinterpret_cast<int64_t*>(d)); return;
-    case 'S':
-        // first search to see if it has "\x00\x01" in it -
-        // which separates fields which are reversed in the ascii version.
-        // yeah.
-        // FBX, yeah.
-        for (size_t i = 0; i < data.size(); ++i) {
-            if (data[i] == '\0') {
-                swap = i;
-                break;
-            }
-        }
-    case 'R':
-        s << '"';
-        // we might as well check this now,
-        // probably it will never happen
-        for (size_t i = 0; i < data.size(); ++i) {
-            char c = data[i];
-            if (c == '"') {
-                throw runtime_error("can't handle quotes in property string");
-            }
-        }
-        // first write the SWAPPED member (if any)
-        for (size_t i = swap + 2; i < data.size(); ++i) {
-            char c = data[i];
-            s << c;
-        }
-        // then a separator
-        if (swap != data.size()) {
-            s << "::";
-        }
-        // then the initial member
-        for (size_t i = 0; i < swap; ++i) {
-            char c = data[i];
-            s << c;
-        }
-        s << '"';
-        return;
-    case 'i':
-        N = data.size() / 4; // number of elements
-        s << '*' << N << " {\n";
-        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
-        s << "a: ";
-        for (size_t i = 0; i < N; ++i) {
-            if (i > 0) { s << ','; }
-            if (count++ > 120) { s << '\n'; count = 0; }
-            s << (reinterpret_cast<int32_t*>(d))[i];
-        }
-        s << '\n';
-        for (int i = 0; i < indent; ++i) { s << '\t'; }
-        s << "} ";
-        return;
-    case 'l':
-        N = data.size() / 8;
-        s << '*' << N << " {\n";
-        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
-        s << "a: ";
-        for (size_t i = 0; i < N; ++i) {
-            if (i > 0) { s << ','; }
-            if (count++ > 120) { s << '\n'; count = 0; }
-            s << (reinterpret_cast<int64_t*>(d))[i];
-        }
-        s << '\n';
-        for (int i = 0; i < indent; ++i) { s << '\t'; }
-        s << "} ";
-        return;
-    case 'f':
-        N = data.size() / 4;
-        s << '*' << N << " {\n";
-        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
-        s << "a: ";
-        for (size_t i = 0; i < N; ++i) {
-            if (i > 0) { s << ','; }
-            if (count++ > 120) { s << '\n'; count = 0; }
-            s << (reinterpret_cast<float*>(d))[i];
-        }
-        s << '\n';
-        for (int i = 0; i < indent; ++i) { s << '\t'; }
-        s << "} ";
-        return;
-    case 'd':
-        N = data.size() / 8;
-        s << '*' << N << " {\n";
-        for (int i = 0; i < indent + 1; ++i) { s << '\t'; }
-        s << "a: ";
-        // set precision to something that can handle doubles
-        s.precision(15);
-        for (size_t i = 0; i < N; ++i) {
-            if (i > 0) { s << ','; }
-            if (count++ > 120) { s << '\n'; count = 0; }
-            s << (reinterpret_cast<double*>(d))[i];
-        }
-        s << '\n';
-        for (int i = 0; i < indent; ++i) { s << '\t'; }
-        s << "} ";
-        return;
-    default:
-        std::ostringstream err;
-        err << "Tried to dump property with invalid type '";
-        err << type << "'!";
-        throw runtime_error(err.str());
-    }
-}
-
-} // Namespace FBX
-} // Namespace Assimp
-
-#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
-#endif // ASSIMP_BUILD_NO_EXPORT
diff --git a/libs/assimp/code/AssetLib/FBX/FBXExportProperty.h b/libs/assimp/code/AssetLib/FBX/FBXExportProperty.h
deleted file mode 100644
index 26d0cf2..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXExportProperty.h
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file FBXExportProperty.h
-* Declares the FBX::Property helper class for fbx export.
-*/
-#ifndef AI_FBXEXPORTPROPERTY_H_INC
-#define AI_FBXEXPORTPROPERTY_H_INC
-
-#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#include <assimp/types.h> // aiMatrix4x4
-#include <assimp/StreamWriter.h> // StreamWriterLE
-
-#include <string>
-#include <vector>
-#include <ostream>
-#include <type_traits> // is_void
-
-namespace Assimp {
-namespace FBX {
-
-/** @brief FBX::Property
- *
- *  Holds a value of any of FBX's recognized types,
- *  each represented by a particular one-character code.
- *  C : 1-byte uint8, usually 0x00 or 0x01 to represent boolean false and true
- *  Y : 2-byte int16
- *  I : 4-byte int32
- *  F : 4-byte float
- *  D : 8-byte double
- *  L : 8-byte int64
- *  i : array of int32
- *  f : array of float
- *  d : array of double
- *  l : array of int64
- *  b : array of 1-byte booleans (0x00 or 0x01)
- *  S : string (array of 1-byte char)
- *  R : raw data (array of bytes)
- */
-class FBXExportProperty {
-public:
-    // constructors for basic types.
-    // all explicit to avoid accidental typecasting
-    explicit FBXExportProperty(bool v);
-    // TODO: determine if there is actually a byte type,
-    // or if this always means <bool>. 'C' seems to imply <char>,
-    // so possibly the above was intended to represent both.
-    explicit FBXExportProperty(int16_t v);
-    explicit FBXExportProperty(int32_t v);
-    explicit FBXExportProperty(float v);
-    explicit FBXExportProperty(double v);
-    explicit FBXExportProperty(int64_t v);
-    // strings can either be stored as 'R' (raw) or 'S' (string) type
-    explicit FBXExportProperty(const char* c, bool raw = false);
-    explicit FBXExportProperty(const std::string& s, bool raw = false);
-    explicit FBXExportProperty(const std::vector<uint8_t>& r);
-    explicit FBXExportProperty(const std::vector<int32_t>& va);
-    explicit FBXExportProperty(const std::vector<int64_t>& va);
-    explicit FBXExportProperty(const std::vector<double>& va);
-    explicit FBXExportProperty(const std::vector<float>& va);
-    explicit FBXExportProperty(const aiMatrix4x4& vm);
-
-    // this will catch any type not defined above,
-    // so that we don't accidentally convert something we don't want.
-    // for example (const char*) --> (bool)... seriously wtf C++
-    template <class T>
-    explicit FBXExportProperty(T v) : type('X') {
-        static_assert(std::is_void<T>::value, "TRIED TO CREATE FBX PROPERTY WITH UNSUPPORTED TYPE, CHECK YOUR PROPERTY INSTANTIATION");
-    } // note: no line wrap so it appears verbatim on the compiler error
-
-    // the size of this property node in a binary file, in bytes
-    size_t size();
-
-    // write this property node as binary data to the given stream
-    void DumpBinary(Assimp::StreamWriterLE& s);
-    void DumpAscii(Assimp::StreamWriterLE& s, int indent = 0);
-    void DumpAscii(std::ostream& s, int indent = 0);
-    // note: make sure the ostream is in classic "C" locale
-
-private:
-    char type;
-    std::vector<uint8_t> data;
-};
-
-} // Namespace FBX
-} // Namespace Assimp
-
-#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#endif // AI_FBXEXPORTPROPERTY_H_INC
diff --git a/libs/assimp/code/AssetLib/FBX/FBXExporter.cpp b/libs/assimp/code/AssetLib/FBX/FBXExporter.cpp
deleted file mode 100644
index 6956728..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXExporter.cpp
+++ /dev/null
@@ -1,2799 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-#ifndef ASSIMP_BUILD_NO_EXPORT
-#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#include "FBXExporter.h"
-#include "FBXExportNode.h"
-#include "FBXExportProperty.h"
-#include "FBXCommon.h"
-#include "FBXUtil.h"
-
-#include <assimp/version.h> // aiGetVersion
-#include <assimp/IOSystem.hpp>
-#include <assimp/Exporter.hpp>
-#include <assimp/DefaultLogger.hpp>
-#include <assimp/StreamWriter.h> // StreamWriterLE
-#include <assimp/Exceptional.h> // DeadlyExportError
-#include <assimp/material.h> // aiTextureType
-#include <assimp/scene.h>
-#include <assimp/mesh.h>
-
-// Header files, standard library.
-#include <memory> // shared_ptr
-#include <string>
-#include <sstream> // stringstream
-#include <ctime> // localtime, tm_*
-#include <map>
-#include <set>
-#include <vector>
-#include <array>
-#include <unordered_set>
-#include <numeric>
-
-// RESOURCES:
-// https://code.blender.org/2013/08/fbx-binary-file-format-specification/
-// https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure
-
-const ai_real DEG = ai_real( 57.29577951308232087679815481 ); // degrees per radian
-
-using namespace Assimp;
-using namespace Assimp::FBX;
-
-// some constants that we'll use for writing metadata
-namespace Assimp {
-namespace FBX {
-    const std::string EXPORT_VERSION_STR = "7.5.0";
-    const uint32_t EXPORT_VERSION_INT = 7500; // 7.5 == 2016+
-    // FBX files have some hashed values that depend on the creation time field,
-    // but for now we don't actually know how to generate these.
-    // what we can do is set them to a known-working version.
-    // this is the data that Blender uses in their FBX export process.
-    const std::string GENERIC_CTIME = "1970-01-01 10:00:00:000";
-    const std::string GENERIC_FILEID =
-        "\x28\xb3\x2a\xeb\xb6\x24\xcc\xc2\xbf\xc8\xb0\x2a\xa9\x2b\xfc\xf1";
-    const std::string GENERIC_FOOTID =
-        "\xfa\xbc\xab\x09\xd0\xc8\xd4\x66\xb1\x76\xfb\x83\x1c\xf7\x26\x7e";
-    const std::string FOOT_MAGIC =
-        "\xf8\x5a\x8c\x6a\xde\xf5\xd9\x7e\xec\xe9\x0c\xe3\x75\x8f\x29\x0b";
-    const std::string COMMENT_UNDERLINE =
-        ";------------------------------------------------------------------";
-}
-
-    // ---------------------------------------------------------------------
-    // Worker function for exporting a scene to binary FBX.
-    // Prototyped and registered in Exporter.cpp
-    void ExportSceneFBX (
-        const char* pFile,
-        IOSystem* pIOSystem,
-        const aiScene* pScene,
-        const ExportProperties* pProperties
-    ){
-        // initialize the exporter
-        FBXExporter exporter(pScene, pProperties);
-
-        // perform binary export
-        exporter.ExportBinary(pFile, pIOSystem);
-    }
-
-    // ---------------------------------------------------------------------
-    // Worker function for exporting a scene to ASCII FBX.
-    // Prototyped and registered in Exporter.cpp
-    void ExportSceneFBXA (
-        const char* pFile,
-        IOSystem* pIOSystem,
-        const aiScene* pScene,
-        const ExportProperties* pProperties
-
-    ){
-        // initialize the exporter
-        FBXExporter exporter(pScene, pProperties);
-
-        // perform ascii export
-        exporter.ExportAscii(pFile, pIOSystem);
-    }
-
-} // end of namespace Assimp
-
-FBXExporter::FBXExporter ( const aiScene* pScene, const ExportProperties* pProperties )
-: binary(false)
-, mScene(pScene)
-, mProperties(pProperties)
-, outfile()
-, connections()
-, mesh_uids()
-, material_uids()
-, node_uids() {
-    // will probably need to determine UIDs, connections, etc here.
-    // basically anything that needs to be known
-    // before we start writing sections to the stream.
-}
-
-void FBXExporter::ExportBinary (
-    const char* pFile,
-    IOSystem* pIOSystem
-){
-    // remember that we're exporting in binary mode
-    binary = true;
-
-    // we're not currently using these preferences,
-    // but clang will cry about it if we never touch it.
-    // TODO: some of these might be relevant to export
-    (void)mProperties;
-
-    // open the indicated file for writing (in binary mode)
-    outfile.reset(pIOSystem->Open(pFile,"wb"));
-    if (!outfile) {
-        throw DeadlyExportError(
-            "could not open output .fbx file: " + std::string(pFile)
-        );
-    }
-
-    // first a binary-specific file header
-    WriteBinaryHeader();
-
-    // the rest of the file is in node entries.
-    // we have to serialize each entry before we write to the output,
-    // as the first thing we write is the byte offset of the _next_ entry.
-    // Either that or we can skip back to write the offset when we finish.
-    WriteAllNodes();
-
-    // finally we have a binary footer to the file
-    WriteBinaryFooter();
-
-    // explicitly release file pointer,
-    // so we don't have to rely on class destruction.
-    outfile.reset();
-}
-
-void FBXExporter::ExportAscii (
-    const char* pFile,
-    IOSystem* pIOSystem
-){
-    // remember that we're exporting in ascii mode
-    binary = false;
-
-    // open the indicated file for writing in text mode
-    outfile.reset(pIOSystem->Open(pFile,"wt"));
-    if (!outfile) {
-        throw DeadlyExportError(
-            "could not open output .fbx file: " + std::string(pFile)
-        );
-    }
-
-    // write the ascii header
-    WriteAsciiHeader();
-
-    // write all the sections
-    WriteAllNodes();
-
-    // make sure the file ends with a newline.
-    // note: if the file is opened in text mode,
-    // this should do the right cross-platform thing.
-    outfile->Write("\n", 1, 1);
-
-    // explicitly release file pointer,
-    // so we don't have to rely on class destruction.
-    outfile.reset();
-}
-
-void FBXExporter::WriteAsciiHeader()
-{
-    // basically just a comment at the top of the file
-    std::stringstream head;
-    head << "; FBX " << EXPORT_VERSION_STR << " project file\n";
-    head << "; Created by the Open Asset Import Library (Assimp)\n";
-    head << "; http://assimp.org\n";
-    head << "; -------------------------------------------------\n";
-    const std::string ascii_header = head.str();
-    outfile->Write(ascii_header.c_str(), ascii_header.size(), 1);
-}
-
-void FBXExporter::WriteAsciiSectionHeader(const std::string& title)
-{
-    StreamWriterLE outstream(outfile);
-    std::stringstream s;
-    s << "\n\n; " << title << '\n';
-    s << FBX::COMMENT_UNDERLINE << "\n";
-    outstream.PutString(s.str());
-}
-
-void FBXExporter::WriteBinaryHeader()
-{
-    // first a specific sequence of 23 bytes, always the same
-    const char binary_header[24] = "Kaydara FBX Binary\x20\x20\x00\x1a\x00";
-    outfile->Write(binary_header, 1, 23);
-
-    // then FBX version number, "multiplied" by 1000, as little-endian uint32.
-    // so 7.3 becomes 7300 == 0x841C0000, 7.4 becomes 7400 == 0xE81C0000, etc
-    {
-        StreamWriterLE outstream(outfile);
-        outstream.PutU4(EXPORT_VERSION_INT);
-    } // StreamWriter destructor writes the data to the file
-
-    // after this the node data starts immediately
-    // (probably with the FBXHEaderExtension node)
-}
-
-void FBXExporter::WriteBinaryFooter()
-{
-    outfile->Write(NULL_RECORD.c_str(), NULL_RECORD.size(), 1);
-
-    outfile->Write(GENERIC_FOOTID.c_str(), GENERIC_FOOTID.size(), 1);
-
-    // here some padding is added for alignment to 16 bytes.
-    // if already aligned, the full 16 bytes is added.
-    size_t pos = outfile->Tell();
-    size_t pad = 16 - (pos % 16);
-    for (size_t i = 0; i < pad; ++i) {
-        outfile->Write("\x00", 1, 1);
-    }
-
-    // not sure what this is, but it seems to always be 0 in modern files
-    for (size_t i = 0; i < 4; ++i) {
-        outfile->Write("\x00", 1, 1);
-    }
-
-    // now the file version again
-    {
-        StreamWriterLE outstream(outfile);
-        outstream.PutU4(EXPORT_VERSION_INT);
-    } // StreamWriter destructor writes the data to the file
-
-    // and finally some binary footer added to all files
-    for (size_t i = 0; i < 120; ++i) {
-        outfile->Write("\x00", 1, 1);
-    }
-    outfile->Write(FOOT_MAGIC.c_str(), FOOT_MAGIC.size(), 1);
-}
-
-void FBXExporter::WriteAllNodes ()
-{
-    // header
-    // (and fileid, creation time, creator, if binary)
-    WriteHeaderExtension();
-
-    // global settings
-    WriteGlobalSettings();
-
-    // documents
-    WriteDocuments();
-
-    // references
-    WriteReferences();
-
-    // definitions
-    WriteDefinitions();
-
-    // objects
-    WriteObjects();
-
-    // connections
-    WriteConnections();
-
-    // WriteTakes? (deprecated since at least 2015 (fbx 7.4))
-}
-
-//FBXHeaderExtension top-level node
-void FBXExporter::WriteHeaderExtension ()
-{
-    if (!binary) {
-        // no title, follows directly from the top comment
-    }
-    FBX::Node n("FBXHeaderExtension");
-    StreamWriterLE outstream(outfile);
-    int indent = 0;
-
-    // begin node
-    n.Begin(outstream, binary, indent);
-
-    // write properties
-    // (none)
-
-    // finish properties
-    n.EndProperties(outstream, binary, indent, 0);
-
-    // begin children
-    n.BeginChildren(outstream, binary, indent);
-
-    indent = 1;
-
-    // write child nodes
-    FBX::Node::WritePropertyNode(
-        "FBXHeaderVersion", int32_t(1003), outstream, binary, indent
-    );
-    FBX::Node::WritePropertyNode(
-        "FBXVersion", int32_t(EXPORT_VERSION_INT), outstream, binary, indent
-    );
-    if (binary) {
-        FBX::Node::WritePropertyNode(
-            "EncryptionType", int32_t(0), outstream, binary, indent
-        );
-    }
-
-    FBX::Node CreationTimeStamp("CreationTimeStamp");
-    time_t rawtime;
-    time(&rawtime);
-    struct tm * now = localtime(&rawtime);
-    CreationTimeStamp.AddChild("Version", int32_t(1000));
-    CreationTimeStamp.AddChild("Year", int32_t(now->tm_year + 1900));
-    CreationTimeStamp.AddChild("Month", int32_t(now->tm_mon + 1));
-    CreationTimeStamp.AddChild("Day", int32_t(now->tm_mday));
-    CreationTimeStamp.AddChild("Hour", int32_t(now->tm_hour));
-    CreationTimeStamp.AddChild("Minute", int32_t(now->tm_min));
-    CreationTimeStamp.AddChild("Second", int32_t(now->tm_sec));
-    CreationTimeStamp.AddChild("Millisecond", int32_t(0));
-    CreationTimeStamp.Dump(outstream, binary, indent);
-
-    std::stringstream creator;
-    creator << "Open Asset Import Library (Assimp) " << aiGetVersionMajor()
-            << "." << aiGetVersionMinor() << "." << aiGetVersionRevision();
-    FBX::Node::WritePropertyNode(
-        "Creator", creator.str(), outstream, binary, indent
-    );
-
-    //FBX::Node sceneinfo("SceneInfo");
-    //sceneinfo.AddProperty("GlobalInfo" + FBX::SEPARATOR + "SceneInfo");
-    // not sure if any of this is actually needed,
-    // so just write an empty node for now.
-    //sceneinfo.Dump(outstream, binary, indent);
-
-    indent = 0;
-
-    // finish node
-    n.End(outstream, binary, indent, true);
-
-    // that's it for FBXHeaderExtension...
-    if (!binary) { return; }
-
-    // but binary files also need top-level FileID, CreationTime, Creator:
-    std::vector<uint8_t> raw(GENERIC_FILEID.size());
-    for (size_t i = 0; i < GENERIC_FILEID.size(); ++i) {
-        raw[i] = uint8_t(GENERIC_FILEID[i]);
-    }
-    FBX::Node::WritePropertyNode(
-        "FileId", raw, outstream, binary, indent
-    );
-    FBX::Node::WritePropertyNode(
-        "CreationTime", GENERIC_CTIME, outstream, binary, indent
-    );
-    FBX::Node::WritePropertyNode(
-        "Creator", creator.str(), outstream, binary, indent
-    );
-}
-
-// WriteGlobalSettings helpers
-
-void WritePropInt(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue)
-{
-    int value;
-    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
-        p.AddP70int(key, value);
-    } else {
-        p.AddP70int(key, defaultValue);
-    }
-}
-
-void WritePropDouble(const aiScene* scene, FBX::Node& p, const std::string& key, double defaultValue)
-{
-    double value;
-    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
-        p.AddP70double(key, value);
-    } else {
-        // fallback lookup float instead
-        float floatValue;
-        if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, floatValue)) {
-            p.AddP70double(key, (double)floatValue);
-        } else {
-            p.AddP70double(key, defaultValue);
-        }
-    }
-}
-
-void WritePropEnum(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue)
-{
-    int value;
-    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
-        p.AddP70enum(key, value);
-    } else {
-        p.AddP70enum(key, defaultValue);
-    }
-}
-
-void WritePropColor(const aiScene* scene, FBX::Node& p, const std::string& key, const aiVector3D& defaultValue)
-{
-    aiVector3D value;
-    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
-        // ai_real can be float or double, cast to avoid warnings
-        p.AddP70color(key, (double)value.x, (double)value.y, (double)value.z);
-    } else {
-        p.AddP70color(key, (double)defaultValue.x, (double)defaultValue.y, (double)defaultValue.z);
-    }
-}
-
-void WritePropString(const aiScene* scene, FBX::Node& p, const std::string& key, const std::string& defaultValue)
-{
-    aiString value; // MetaData doesn't hold std::string
-    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
-        p.AddP70string(key, value.C_Str());
-    } else {
-        p.AddP70string(key, defaultValue);
-    }
-}
-
-void FBXExporter::WriteGlobalSettings ()
-{
-    if (!binary) {
-        // no title, follows directly from the header extension
-    }
-    FBX::Node gs("GlobalSettings");
-    gs.AddChild("Version", int32_t(1000));
-
-    FBX::Node p("Properties70");
-    WritePropInt(mScene, p, "UpAxis", 1);
-    WritePropInt(mScene, p, "UpAxisSign", 1);
-    WritePropInt(mScene, p, "FrontAxis", 2);
-    WritePropInt(mScene, p, "FrontAxisSign", 1);
-    WritePropInt(mScene, p, "CoordAxis", 0);
-    WritePropInt(mScene, p, "CoordAxisSign", 1);
-    WritePropInt(mScene, p, "OriginalUpAxis", 1);
-    WritePropInt(mScene, p, "OriginalUpAxisSign", 1);
-    WritePropDouble(mScene, p, "UnitScaleFactor", 1.0);
-    WritePropDouble(mScene, p, "OriginalUnitScaleFactor", 1.0);
-    WritePropColor(mScene, p, "AmbientColor", aiVector3D((ai_real)0.0, (ai_real)0.0, (ai_real)0.0));
-    WritePropString(mScene, p,"DefaultCamera", "Producer Perspective");
-    WritePropEnum(mScene, p, "TimeMode", 11);
-    WritePropEnum(mScene, p, "TimeProtocol", 2);
-    WritePropEnum(mScene, p, "SnapOnFrameMode", 0);
-    p.AddP70time("TimeSpanStart", 0); // TODO: animation support
-    p.AddP70time("TimeSpanStop", FBX::SECOND); // TODO: animation support
-    WritePropDouble(mScene, p, "CustomFrameRate", -1.0);
-    p.AddP70("TimeMarker", "Compound", "", ""); // not sure what this is
-    WritePropInt(mScene, p, "CurrentTimeMarker", -1);
-    gs.AddChild(p);
-
-    gs.Dump(outfile, binary, 0);
-}
-
-void FBXExporter::WriteDocuments ()
-{
-    if (!binary) {
-        WriteAsciiSectionHeader("Documents Description");
-    }
-
-    // not sure what the use of multiple documents would be,
-    // or whether any end-application supports it
-    FBX::Node docs("Documents");
-    docs.AddChild("Count", int32_t(1));
-    FBX::Node doc("Document");
-
-    // generate uid
-    int64_t uid = generate_uid();
-    doc.AddProperties(uid, "", "Scene");
-    FBX::Node p("Properties70");
-    p.AddP70("SourceObject", "object", "", ""); // what is this even for?
-    p.AddP70string("ActiveAnimStackName", ""); // should do this properly?
-    doc.AddChild(p);
-
-    // UID for root node in scene hierarchy.
-    // always set to 0 in the case of a single document.
-    // not sure what happens if more than one document exists,
-    // but that won't matter to us as we're exporting a single scene.
-    doc.AddChild("RootNode", int64_t(0));
-
-    docs.AddChild(doc);
-    docs.Dump(outfile, binary, 0);
-}
-
-void FBXExporter::WriteReferences ()
-{
-    if (!binary) {
-        WriteAsciiSectionHeader("Document References");
-    }
-    // always empty for now.
-    // not really sure what this is for.
-    FBX::Node n("References");
-    n.force_has_children = true;
-    n.Dump(outfile, binary, 0);
-}
-
-
-// ---------------------------------------------------------------
-// some internal helper functions used for writing the definitions
-// (before any actual data is written)
-// ---------------------------------------------------------------
-
-size_t count_nodes(const aiNode* n, const aiNode* root) {
-    size_t count;
-    if (n == root) {
-        count = n->mNumMeshes; // (not counting root node)
-    } else if (n->mNumMeshes > 1) {
-        count = n->mNumMeshes + 1;
-    } else {
-        count = 1;
-    }
-    for (size_t i = 0; i < n->mNumChildren; ++i) {
-        count += count_nodes(n->mChildren[i], root);
-    }
-    return count;
-}
-
-bool has_phong_mat(const aiScene* scene)
-{
-    // just search for any material with a shininess exponent
-    for (size_t i = 0; i < scene->mNumMaterials; ++i) {
-        aiMaterial* mat = scene->mMaterials[i];
-        float shininess = 0;
-        mat->Get(AI_MATKEY_SHININESS, shininess);
-        if (shininess > 0) {
-            return true;
-        }
-    }
-    return false;
-}
-
-size_t count_images(const aiScene* scene) {
-    std::unordered_set<std::string> images;
-    aiString texpath;
-    for (size_t i = 0; i < scene->mNumMaterials; ++i) {
-        aiMaterial* mat = scene->mMaterials[i];
-        for (
-            size_t tt = aiTextureType_DIFFUSE;
-            tt < aiTextureType_UNKNOWN;
-            ++tt
-        ){
-            const aiTextureType textype = static_cast<aiTextureType>(tt);
-            const size_t texcount = mat->GetTextureCount(textype);
-            for (unsigned int j = 0; j < texcount; ++j) {
-                mat->GetTexture(textype, j, &texpath);
-                images.insert(std::string(texpath.C_Str()));
-            }
-        }
-    }
-    return images.size();
-}
-
-size_t count_textures(const aiScene* scene) {
-    size_t count = 0;
-    for (size_t i = 0; i < scene->mNumMaterials; ++i) {
-        aiMaterial* mat = scene->mMaterials[i];
-        for (
-            size_t tt = aiTextureType_DIFFUSE;
-            tt < aiTextureType_UNKNOWN;
-            ++tt
-        ){
-            // TODO: handle layered textures
-            if (mat->GetTextureCount(static_cast<aiTextureType>(tt)) > 0) {
-                count += 1;
-            }
-        }
-    }
-    return count;
-}
-
-size_t count_deformers(const aiScene* scene) {
-    size_t count = 0;
-    for (size_t i = 0; i < scene->mNumMeshes; ++i) {
-        const size_t n = scene->mMeshes[i]->mNumBones;
-        if (n) {
-            // 1 main deformer, 1 subdeformer per bone
-            count += n + 1;
-        }
-    }
-    return count;
-}
-
-void FBXExporter::WriteDefinitions ()
-{
-    // basically this is just bookkeeping:
-    // determining how many of each type of object there are
-    // and specifying the base properties to use when otherwise unspecified.
-
-    // ascii section header
-    if (!binary) {
-        WriteAsciiSectionHeader("Object definitions");
-    }
-
-    // we need to count the objects
-    int32_t count;
-    int32_t total_count = 0;
-
-    // and store them
-    std::vector<FBX::Node> object_nodes;
-    FBX::Node n, pt, p;
-
-    // GlobalSettings
-    // this seems to always be here in Maya exports
-    n = FBX::Node("ObjectType", "GlobalSettings");
-    count = 1;
-    n.AddChild("Count", count);
-    object_nodes.push_back(n);
-    total_count += count;
-
-    // AnimationStack / FbxAnimStack
-    // this seems to always be here in Maya exports,
-    // but no harm seems to come of leaving it out.
-    count = mScene->mNumAnimations;
-    if (count) {
-        n = FBX::Node("ObjectType", "AnimationStack");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FbxAnimStack");
-        p = FBX::Node("Properties70");
-        p.AddP70string("Description", "");
-        p.AddP70time("LocalStart", 0);
-        p.AddP70time("LocalStop", 0);
-        p.AddP70time("ReferenceStart", 0);
-        p.AddP70time("ReferenceStop", 0);
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // AnimationLayer / FbxAnimLayer
-    // this seems to always be here in Maya exports,
-    // but no harm seems to come of leaving it out.
-    // Assimp doesn't support animation layers,
-    // so there will be one per aiAnimation
-    count = mScene->mNumAnimations;
-    if (count) {
-        n = FBX::Node("ObjectType", "AnimationLayer");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FBXAnimLayer");
-        p = FBX::Node("Properties70");
-        p.AddP70("Weight", "Number", "", "A", double(100));
-        p.AddP70bool("Mute", 0);
-        p.AddP70bool("Solo", 0);
-        p.AddP70bool("Lock", 0);
-        p.AddP70color("Color", 0.8, 0.8, 0.8);
-        p.AddP70("BlendMode", "enum", "", "", int32_t(0));
-        p.AddP70("RotationAccumulationMode", "enum", "", "", int32_t(0));
-        p.AddP70("ScaleAccumulationMode", "enum", "", "", int32_t(0));
-        p.AddP70("BlendModeBypass", "ULongLong", "", "", int64_t(0));
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // NodeAttribute
-    // this is completely absurd.
-    // there can only be one "NodeAttribute" template,
-    // but FbxSkeleton, FbxCamera, FbxLight all are "NodeAttributes".
-    // so if only one exists we should set the template for that,
-    // otherwise... we just pick one :/.
-    // the others have to set all their properties every instance,
-    // because there's no template.
-    count = 1; // TODO: select properly
-    if (count) {
-        // FbxSkeleton
-        n = FBX::Node("ObjectType", "NodeAttribute");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FbxSkeleton");
-        p = FBX::Node("Properties70");
-        p.AddP70color("Color", 0.8, 0.8, 0.8);
-        p.AddP70double("Size", 33.333333333333);
-        p.AddP70("LimbLength", "double", "Number", "H", double(1));
-        // note: not sure what the "H" flag is for - hidden?
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // Model / FbxNode
-    // <~~ node hierarchy
-    count = int32_t(count_nodes(mScene->mRootNode, mScene->mRootNode));
-    if (count) {
-        n = FBX::Node("ObjectType", "Model");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FbxNode");
-        p = FBX::Node("Properties70");
-        p.AddP70enum("QuaternionInterpolate", 0);
-        p.AddP70vector("RotationOffset", 0.0, 0.0, 0.0);
-        p.AddP70vector("RotationPivot", 0.0, 0.0, 0.0);
-        p.AddP70vector("ScalingOffset", 0.0, 0.0, 0.0);
-        p.AddP70vector("ScalingPivot", 0.0, 0.0, 0.0);
-        p.AddP70bool("TranslationActive", 0);
-        p.AddP70vector("TranslationMin", 0.0, 0.0, 0.0);
-        p.AddP70vector("TranslationMax", 0.0, 0.0, 0.0);
-        p.AddP70bool("TranslationMinX", 0);
-        p.AddP70bool("TranslationMinY", 0);
-        p.AddP70bool("TranslationMinZ", 0);
-        p.AddP70bool("TranslationMaxX", 0);
-        p.AddP70bool("TranslationMaxY", 0);
-        p.AddP70bool("TranslationMaxZ", 0);
-        p.AddP70enum("RotationOrder", 0);
-        p.AddP70bool("RotationSpaceForLimitOnly", 0);
-        p.AddP70double("RotationStiffnessX", 0.0);
-        p.AddP70double("RotationStiffnessY", 0.0);
-        p.AddP70double("RotationStiffnessZ", 0.0);
-        p.AddP70double("AxisLen", 10.0);
-        p.AddP70vector("PreRotation", 0.0, 0.0, 0.0);
-        p.AddP70vector("PostRotation", 0.0, 0.0, 0.0);
-        p.AddP70bool("RotationActive", 0);
-        p.AddP70vector("RotationMin", 0.0, 0.0, 0.0);
-        p.AddP70vector("RotationMax", 0.0, 0.0, 0.0);
-        p.AddP70bool("RotationMinX", 0);
-        p.AddP70bool("RotationMinY", 0);
-        p.AddP70bool("RotationMinZ", 0);
-        p.AddP70bool("RotationMaxX", 0);
-        p.AddP70bool("RotationMaxY", 0);
-        p.AddP70bool("RotationMaxZ", 0);
-        p.AddP70enum("InheritType", 0);
-        p.AddP70bool("ScalingActive", 0);
-        p.AddP70vector("ScalingMin", 0.0, 0.0, 0.0);
-        p.AddP70vector("ScalingMax", 1.0, 1.0, 1.0);
-        p.AddP70bool("ScalingMinX", 0);
-        p.AddP70bool("ScalingMinY", 0);
-        p.AddP70bool("ScalingMinZ", 0);
-        p.AddP70bool("ScalingMaxX", 0);
-        p.AddP70bool("ScalingMaxY", 0);
-        p.AddP70bool("ScalingMaxZ", 0);
-        p.AddP70vector("GeometricTranslation", 0.0, 0.0, 0.0);
-        p.AddP70vector("GeometricRotation", 0.0, 0.0, 0.0);
-        p.AddP70vector("GeometricScaling", 1.0, 1.0, 1.0);
-        p.AddP70double("MinDampRangeX", 0.0);
-        p.AddP70double("MinDampRangeY", 0.0);
-        p.AddP70double("MinDampRangeZ", 0.0);
-        p.AddP70double("MaxDampRangeX", 0.0);
-        p.AddP70double("MaxDampRangeY", 0.0);
-        p.AddP70double("MaxDampRangeZ", 0.0);
-        p.AddP70double("MinDampStrengthX", 0.0);
-        p.AddP70double("MinDampStrengthY", 0.0);
-        p.AddP70double("MinDampStrengthZ", 0.0);
-        p.AddP70double("MaxDampStrengthX", 0.0);
-        p.AddP70double("MaxDampStrengthY", 0.0);
-        p.AddP70double("MaxDampStrengthZ", 0.0);
-        p.AddP70double("PreferedAngleX", 0.0);
-        p.AddP70double("PreferedAngleY", 0.0);
-        p.AddP70double("PreferedAngleZ", 0.0);
-        p.AddP70("LookAtProperty", "object", "", "");
-        p.AddP70("UpVectorProperty", "object", "", "");
-        p.AddP70bool("Show", 1);
-        p.AddP70bool("NegativePercentShapeSupport", 1);
-        p.AddP70int("DefaultAttributeIndex", -1);
-        p.AddP70bool("Freeze", 0);
-        p.AddP70bool("LODBox", 0);
-        p.AddP70(
-            "Lcl Translation", "Lcl Translation", "", "A",
-            double(0), double(0), double(0)
-        );
-        p.AddP70(
-            "Lcl Rotation", "Lcl Rotation", "", "A",
-            double(0), double(0), double(0)
-        );
-        p.AddP70(
-            "Lcl Scaling", "Lcl Scaling", "", "A",
-            double(1), double(1), double(1)
-        );
-        p.AddP70("Visibility", "Visibility", "", "A", double(1));
-        p.AddP70(
-            "Visibility Inheritance", "Visibility Inheritance", "", "",
-            int32_t(1)
-        );
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // Geometry / FbxMesh
-    // <~~ aiMesh
-    count = mScene->mNumMeshes;
-
-    // Blendshapes are considered Geometry
-    int32_t bsDeformerCount=0;
-    for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) {
-        aiMesh* m = mScene->mMeshes[mi];
-        if (m->mNumAnimMeshes > 0) {
-          count+=m->mNumAnimMeshes;
-          bsDeformerCount+=m->mNumAnimMeshes; // One deformer per blendshape
-          bsDeformerCount++;                  // Plus one master blendshape deformer
-        }
-    }
-
-    if (count) {
-        n = FBX::Node("ObjectType", "Geometry");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FbxMesh");
-        p = FBX::Node("Properties70");
-        p.AddP70color("Color", 0, 0, 0);
-        p.AddP70vector("BBoxMin", 0, 0, 0);
-        p.AddP70vector("BBoxMax", 0, 0, 0);
-        p.AddP70bool("Primary Visibility", 1);
-        p.AddP70bool("Casts Shadows", 1);
-        p.AddP70bool("Receive Shadows", 1);
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // Material / FbxSurfacePhong, FbxSurfaceLambert, FbxSurfaceMaterial
-    // <~~ aiMaterial
-    // basically if there's any phong material this is defined as phong,
-    // and otherwise lambert.
-    // More complex materials cause a bare-bones FbxSurfaceMaterial definition
-    // and are treated specially, as they're not really supported by FBX.
-    // TODO: support Maya's Stingray PBS material
-    count = mScene->mNumMaterials;
-    if (count) {
-        bool has_phong = has_phong_mat(mScene);
-        n = FBX::Node("ObjectType", "Material");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate");
-        if (has_phong) {
-            pt.AddProperty("FbxSurfacePhong");
-        } else {
-            pt.AddProperty("FbxSurfaceLambert");
-        }
-        p = FBX::Node("Properties70");
-        if (has_phong) {
-            p.AddP70string("ShadingModel", "Phong");
-        } else {
-            p.AddP70string("ShadingModel", "Lambert");
-        }
-        p.AddP70bool("MultiLayer", 0);
-        p.AddP70colorA("EmissiveColor", 0.0, 0.0, 0.0);
-        p.AddP70numberA("EmissiveFactor", 1.0);
-        p.AddP70colorA("AmbientColor", 0.2, 0.2, 0.2);
-        p.AddP70numberA("AmbientFactor", 1.0);
-        p.AddP70colorA("DiffuseColor", 0.8, 0.8, 0.8);
-        p.AddP70numberA("DiffuseFactor", 1.0);
-        p.AddP70vector("Bump", 0.0, 0.0, 0.0);
-        p.AddP70vector("NormalMap", 0.0, 0.0, 0.0);
-        p.AddP70double("BumpFactor", 1.0);
-        p.AddP70colorA("TransparentColor", 0.0, 0.0, 0.0);
-        p.AddP70numberA("TransparencyFactor", 0.0);
-        p.AddP70color("DisplacementColor", 0.0, 0.0, 0.0);
-        p.AddP70double("DisplacementFactor", 1.0);
-        p.AddP70color("VectorDisplacementColor", 0.0, 0.0, 0.0);
-        p.AddP70double("VectorDisplacementFactor", 1.0);
-        if (has_phong) {
-            p.AddP70colorA("SpecularColor", 0.2, 0.2, 0.2);
-            p.AddP70numberA("SpecularFactor", 1.0);
-            p.AddP70numberA("ShininessExponent", 20.0);
-            p.AddP70colorA("ReflectionColor", 0.0, 0.0, 0.0);
-            p.AddP70numberA("ReflectionFactor", 1.0);
-        }
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // Video / FbxVideo
-    // one for each image file.
-    count = int32_t(count_images(mScene));
-    if (count) {
-        n = FBX::Node("ObjectType", "Video");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FbxVideo");
-        p = FBX::Node("Properties70");
-        p.AddP70bool("ImageSequence", 0);
-        p.AddP70int("ImageSequenceOffset", 0);
-        p.AddP70double("FrameRate", 0.0);
-        p.AddP70int("LastFrame", 0);
-        p.AddP70int("Width", 0);
-        p.AddP70int("Height", 0);
-        p.AddP70("Path", "KString", "XRefUrl", "", "");
-        p.AddP70int("StartFrame", 0);
-        p.AddP70int("StopFrame", 0);
-        p.AddP70double("PlaySpeed", 0.0);
-        p.AddP70time("Offset", 0);
-        p.AddP70enum("InterlaceMode", 0);
-        p.AddP70bool("FreeRunning", 0);
-        p.AddP70bool("Loop", 0);
-        p.AddP70enum("AccessMode", 0);
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // Texture / FbxFileTexture
-    // <~~ aiTexture
-    count = int32_t(count_textures(mScene));
-    if (count) {
-        n = FBX::Node("ObjectType", "Texture");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FbxFileTexture");
-        p = FBX::Node("Properties70");
-        p.AddP70enum("TextureTypeUse", 0);
-        p.AddP70numberA("Texture alpha", 1.0);
-        p.AddP70enum("CurrentMappingType", 0);
-        p.AddP70enum("WrapModeU", 0);
-        p.AddP70enum("WrapModeV", 0);
-        p.AddP70bool("UVSwap", 0);
-        p.AddP70bool("PremultiplyAlpha", 1);
-        p.AddP70vectorA("Translation", 0.0, 0.0, 0.0);
-        p.AddP70vectorA("Rotation", 0.0, 0.0, 0.0);
-        p.AddP70vectorA("Scaling", 1.0, 1.0, 1.0);
-        p.AddP70vector("TextureRotationPivot", 0.0, 0.0, 0.0);
-        p.AddP70vector("TextureScalingPivot", 0.0, 0.0, 0.0);
-        p.AddP70enum("CurrentTextureBlendMode", 1);
-        p.AddP70string("UVSet", "default");
-        p.AddP70bool("UseMaterial", 0);
-        p.AddP70bool("UseMipMap", 0);
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // AnimationCurveNode / FbxAnimCurveNode
-    count = mScene->mNumAnimations * 3;
-    if (count) {
-        n = FBX::Node("ObjectType", "AnimationCurveNode");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "FbxAnimCurveNode");
-        p = FBX::Node("Properties70");
-        p.AddP70("d", "Compound", "", "");
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // AnimationCurve / FbxAnimCurve
-    count = mScene->mNumAnimations * 9;
-    if (count) {
-        n = FBX::Node("ObjectType", "AnimationCurve");
-        n.AddChild("Count", count);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // Pose
-    count = 0;
-    for (size_t i = 0; i < mScene->mNumMeshes; ++i) {
-        aiMesh* mesh = mScene->mMeshes[i];
-        if (mesh->HasBones()) { ++count; }
-    }
-    if (count) {
-        n = FBX::Node("ObjectType", "Pose");
-        n.AddChild("Count", count);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // Deformer
-    count = int32_t(count_deformers(mScene))+bsDeformerCount;
-    if (count) {
-        n = FBX::Node("ObjectType", "Deformer");
-        n.AddChild("Count", count);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // (template)
-    count = 0;
-    if (count) {
-        n = FBX::Node("ObjectType", "");
-        n.AddChild("Count", count);
-        pt = FBX::Node("PropertyTemplate", "");
-        p = FBX::Node("Properties70");
-        pt.AddChild(p);
-        n.AddChild(pt);
-        object_nodes.push_back(n);
-        total_count += count;
-    }
-
-    // now write it all
-    FBX::Node defs("Definitions");
-    defs.AddChild("Version", int32_t(100));
-    defs.AddChild("Count", int32_t(total_count));
-    for (auto &on : object_nodes) {
-        defs.AddChild(on);
-    }
-    defs.Dump(outfile, binary, 0);
-}
-
-
-// -------------------------------------------------------------------
-// some internal helper functions used for writing the objects section
-// (which holds the actual data)
-// -------------------------------------------------------------------
-
-aiNode* get_node_for_mesh(unsigned int meshIndex, aiNode* node)
-{
-    for (size_t i = 0; i < node->mNumMeshes; ++i) {
-        if (node->mMeshes[i] == meshIndex) {
-            return node;
-        }
-    }
-    for (size_t i = 0; i < node->mNumChildren; ++i) {
-        aiNode* ret = get_node_for_mesh(meshIndex, node->mChildren[i]);
-        if (ret) { return ret; }
-    }
-    return nullptr;
-}
-
-aiMatrix4x4 get_world_transform(const aiNode* node, const aiScene* scene)
-{
-    std::vector<const aiNode*> node_chain;
-    while (node != scene->mRootNode) {
-        node_chain.push_back(node);
-        node = node->mParent;
-    }
-    aiMatrix4x4 transform;
-    for (auto n = node_chain.rbegin(); n != node_chain.rend(); ++n) {
-        transform *= (*n)->mTransformation;
-    }
-    return transform;
-}
-
-int64_t to_ktime(double ticks, const aiAnimation* anim) {
-    if (anim->mTicksPerSecond <= 0) {
-        return static_cast<int64_t>(ticks) * FBX::SECOND;
-    }
-    return (static_cast<int64_t>(ticks) / static_cast<int64_t>(anim->mTicksPerSecond)) * FBX::SECOND;
-}
-
-int64_t to_ktime(double time) {
-    return (static_cast<int64_t>(time * FBX::SECOND));
-}
-
-void FBXExporter::WriteObjects ()
-{
-    if (!binary) {
-        WriteAsciiSectionHeader("Object properties");
-    }
-    // numbers should match those given in definitions! make sure to check
-    StreamWriterLE outstream(outfile);
-    FBX::Node object_node("Objects");
-    int indent = 0;
-    object_node.Begin(outstream, binary, indent);
-    object_node.EndProperties(outstream, binary, indent);
-    object_node.BeginChildren(outstream, binary, indent);
-
-    bool bJoinIdenticalVertices = mProperties->GetPropertyBool("bJoinIdenticalVertices", true);
-    std::vector<std::vector<int32_t>> vVertexIndice;//save vertex_indices as it is needed later
-
-    // geometry (aiMesh)
-    mesh_uids.clear();
-    indent = 1;
-    for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) {
-        // it's all about this mesh
-        aiMesh* m = mScene->mMeshes[mi];
-
-        // start the node record
-        FBX::Node n("Geometry");
-        int64_t uid = generate_uid();
-        mesh_uids.push_back(uid);
-        n.AddProperty(uid);
-        n.AddProperty(FBX::SEPARATOR + "Geometry");
-        n.AddProperty("Mesh");
-        n.Begin(outstream, binary, indent);
-        n.DumpProperties(outstream, binary, indent);
-        n.EndProperties(outstream, binary, indent);
-        n.BeginChildren(outstream, binary, indent);
-        indent = 2;
-
-        // output vertex data - each vertex should be unique (probably)
-        std::vector<double> flattened_vertices;
-        // index of original vertex in vertex data vector
-        std::vector<int32_t> vertex_indices;
-        // map of vertex value to its index in the data vector
-        std::map<aiVector3D,size_t> index_by_vertex_value;
-        if(bJoinIdenticalVertices){
-            int32_t index = 0;
-            for (size_t vi = 0; vi < m->mNumVertices; ++vi) {
-                aiVector3D vtx = m->mVertices[vi];
-                auto elem = index_by_vertex_value.find(vtx);
-                if (elem == index_by_vertex_value.end()) {
-                    vertex_indices.push_back(index);
-                    index_by_vertex_value[vtx] = index;
-                    flattened_vertices.push_back(vtx[0]);
-                    flattened_vertices.push_back(vtx[1]);
-                    flattened_vertices.push_back(vtx[2]);
-                    ++index;
-                } else {
-                    vertex_indices.push_back(int32_t(elem->second));
-                }
-            }
-        }
-        else { // do not join vertex, respect the export flag
-            vertex_indices.resize(m->mNumVertices);
-            std::iota(vertex_indices.begin(), vertex_indices.end(), 0);
-            for(unsigned int v = 0; v < m->mNumVertices; ++ v) {
-                aiVector3D vtx = m->mVertices[v];
-                flattened_vertices.push_back(vtx.x);
-                flattened_vertices.push_back(vtx.y);
-                flattened_vertices.push_back(vtx.z);
-            }
-        }
-        vVertexIndice.push_back(vertex_indices);
-
-        FBX::Node::WritePropertyNode(
-            "Vertices", flattened_vertices, outstream, binary, indent
-        );
-
-        // output polygon data as a flattened array of vertex indices.
-        // the last vertex index of each polygon is negated and - 1
-        std::vector<int32_t> polygon_data;
-        for (size_t fi = 0; fi < m->mNumFaces; ++fi) {
-            const aiFace &f = m->mFaces[fi];
-            for (size_t pvi = 0; pvi < f.mNumIndices - 1; ++pvi) {
-                polygon_data.push_back(vertex_indices[f.mIndices[pvi]]);
-            }
-            polygon_data.push_back(
-                -1 - vertex_indices[f.mIndices[f.mNumIndices-1]]
-            );
-        }
-        FBX::Node::WritePropertyNode(
-            "PolygonVertexIndex", polygon_data, outstream, binary, indent
-        );
-
-        // here could be edges but they're insane.
-        // it's optional anyway, so let's ignore it.
-
-        FBX::Node::WritePropertyNode(
-            "GeometryVersion", int32_t(124), outstream, binary, indent
-        );
-
-        // normals, if any
-        if (m->HasNormals()) {
-            FBX::Node normals("LayerElementNormal", int32_t(0));
-            normals.Begin(outstream, binary, indent);
-            normals.DumpProperties(outstream, binary, indent);
-            normals.EndProperties(outstream, binary, indent);
-            normals.BeginChildren(outstream, binary, indent);
-            indent = 3;
-            FBX::Node::WritePropertyNode(
-                "Version", int32_t(101), outstream, binary, indent
-            );
-            FBX::Node::WritePropertyNode(
-                "Name", "", outstream, binary, indent
-            );
-            FBX::Node::WritePropertyNode(
-                "MappingInformationType", "ByPolygonVertex",
-                outstream, binary, indent
-            );
-            // TODO: vertex-normals or indexed normals when appropriate
-            FBX::Node::WritePropertyNode(
-                "ReferenceInformationType", "Direct",
-                outstream, binary, indent
-            );
-            std::vector<double> normal_data;
-            normal_data.reserve(3 * polygon_data.size());
-            for (size_t fi = 0; fi < m->mNumFaces; ++fi) {
-                const aiFace &f = m->mFaces[fi];
-                for (size_t pvi = 0; pvi < f.mNumIndices; ++pvi) {
-                    const aiVector3D &curN = m->mNormals[f.mIndices[pvi]];
-                    normal_data.push_back(curN.x);
-                    normal_data.push_back(curN.y);
-                    normal_data.push_back(curN.z);
-                }
-            }
-            FBX::Node::WritePropertyNode(
-                "Normals", normal_data, outstream, binary, indent
-            );
-            // note: version 102 has a NormalsW also... not sure what it is,
-            // so we can stick with version 101 for now.
-            indent = 2;
-            normals.End(outstream, binary, indent, true);
-        }
-
-        // colors, if any
-        // TODO only one color channel currently
-        const int32_t colorChannelIndex = 0;
-        if (m->HasVertexColors(colorChannelIndex)) {
-            FBX::Node vertexcolors("LayerElementColor", int32_t(colorChannelIndex));
-            vertexcolors.Begin(outstream, binary, indent);
-            vertexcolors.DumpProperties(outstream, binary, indent);
-            vertexcolors.EndProperties(outstream, binary, indent);
-            vertexcolors.BeginChildren(outstream, binary, indent);
-            indent = 3;
-            FBX::Node::WritePropertyNode(
-                "Version", int32_t(101), outstream, binary, indent
-            );
-            char layerName[8];
-            sprintf(layerName, "COLOR_%d", colorChannelIndex);
-            FBX::Node::WritePropertyNode(
-                "Name", (const char*)layerName, outstream, binary, indent
-            );
-            FBX::Node::WritePropertyNode(
-                "MappingInformationType", "ByPolygonVertex",
-                outstream, binary, indent
-            );
-            FBX::Node::WritePropertyNode(
-                "ReferenceInformationType", "Direct",
-                outstream, binary, indent
-            );
-            std::vector<double> color_data;
-            color_data.reserve(4 * polygon_data.size());
-            for (size_t fi = 0; fi < m->mNumFaces; ++fi) {
-                const aiFace &f = m->mFaces[fi];
-                for (size_t pvi = 0; pvi < f.mNumIndices; ++pvi) {
-                    const aiColor4D &c = m->mColors[colorChannelIndex][f.mIndices[pvi]];
-                    color_data.push_back(c.r);
-                    color_data.push_back(c.g);
-                    color_data.push_back(c.b);
-                    color_data.push_back(c.a);
-                }
-            }
-            FBX::Node::WritePropertyNode(
-                "Colors", color_data, outstream, binary, indent
-            );
-            indent = 2;
-            vertexcolors.End(outstream, binary, indent, true);
-        }
-
-        // uvs, if any
-        for (size_t uvi = 0; uvi < m->GetNumUVChannels(); ++uvi) {
-            if (m->mNumUVComponents[uvi] > 2) {
-                // FBX only supports 2-channel UV maps...
-                // or at least i'm not sure how to indicate a different number
-                std::stringstream err;
-                err << "Only 2-channel UV maps supported by FBX,";
-                err << " but mesh " << mi;
-                if (m->mName.length) {
-                    err << " (" << m->mName.C_Str() << ")";
-                }
-                err << " UV map " << uvi;
-                err << " has " << m->mNumUVComponents[uvi];
-                err << " components! Data will be preserved,";
-                err << " but may be incorrectly interpreted on load.";
-                ASSIMP_LOG_WARN(err.str());
-            }
-            FBX::Node uv("LayerElementUV", int32_t(uvi));
-            uv.Begin(outstream, binary, indent);
-            uv.DumpProperties(outstream, binary, indent);
-            uv.EndProperties(outstream, binary, indent);
-            uv.BeginChildren(outstream, binary, indent);
-            indent = 3;
-            FBX::Node::WritePropertyNode(
-                "Version", int32_t(101), outstream, binary, indent
-            );
-            // it doesn't seem like assimp keeps the uv map name,
-            // so just leave it blank.
-            FBX::Node::WritePropertyNode(
-                "Name", "", outstream, binary, indent
-            );
-            FBX::Node::WritePropertyNode(
-                "MappingInformationType", "ByPolygonVertex",
-                outstream, binary, indent
-            );
-            FBX::Node::WritePropertyNode(
-                "ReferenceInformationType", "IndexToDirect",
-                outstream, binary, indent
-            );
-
-            std::vector<double> uv_data;
-            std::vector<int32_t> uv_indices;
-            std::map<aiVector3D,int32_t> index_by_uv;
-            int32_t index = 0;
-            for (size_t fi = 0; fi < m->mNumFaces; ++fi) {
-                const aiFace &f = m->mFaces[fi];
-                for (size_t pvi = 0; pvi < f.mNumIndices; ++pvi) {
-                    const aiVector3D &curUv =
-                        m->mTextureCoords[uvi][f.mIndices[pvi]];
-                    auto elem = index_by_uv.find(curUv);
-                    if (elem == index_by_uv.end()) {
-                        index_by_uv[curUv] = index;
-                        uv_indices.push_back(index);
-                        for (unsigned int x = 0; x < m->mNumUVComponents[uvi]; ++x) {
-                            uv_data.push_back(curUv[x]);
-                        }
-                        ++index;
-                    } else {
-                        uv_indices.push_back(elem->second);
-                    }
-                }
-            }
-            FBX::Node::WritePropertyNode(
-                "UV", uv_data, outstream, binary, indent
-            );
-            FBX::Node::WritePropertyNode(
-                "UVIndex", uv_indices, outstream, binary, indent
-            );
-            indent = 2;
-            uv.End(outstream, binary, indent, true);
-        }
-
-        // i'm not really sure why this material section exists,
-        // as the material is linked via "Connections".
-        // it seems to always have the same "0" value.
-        FBX::Node mat("LayerElementMaterial", int32_t(0));
-        mat.AddChild("Version", int32_t(101));
-        mat.AddChild("Name", "");
-        mat.AddChild("MappingInformationType", "AllSame");
-        mat.AddChild("ReferenceInformationType", "IndexToDirect");
-        std::vector<int32_t> mat_indices = {0};
-        mat.AddChild("Materials", mat_indices);
-        mat.Dump(outstream, binary, indent);
-
-        // finally we have the layer specifications,
-        // which select the normals / UV set / etc to use.
-        // TODO: handle multiple uv sets correctly?
-        FBX::Node layer("Layer", int32_t(0));
-        layer.AddChild("Version", int32_t(100));
-        FBX::Node le("LayerElement");
-        le.AddChild("Type", "LayerElementNormal");
-        le.AddChild("TypedIndex", int32_t(0));
-        layer.AddChild(le);
-        // TODO only 1 color channel currently
-        le = FBX::Node("LayerElement");
-        le.AddChild("Type", "LayerElementColor");
-        le.AddChild("TypedIndex", int32_t(0));
-        layer.AddChild(le);
-        le = FBX::Node("LayerElement");
-        le.AddChild("Type", "LayerElementMaterial");
-        le.AddChild("TypedIndex", int32_t(0));
-        layer.AddChild(le);
-        le = FBX::Node("LayerElement");
-        le.AddChild("Type", "LayerElementUV");
-        le.AddChild("TypedIndex", int32_t(0));
-        layer.AddChild(le);
-        layer.Dump(outstream, binary, indent);
-
-        for(unsigned int lr = 1; lr < m->GetNumUVChannels(); ++ lr)
-        {
-            FBX::Node layerExtra("Layer", int32_t(lr));
-            layerExtra.AddChild("Version", int32_t(100));
-            FBX::Node leExtra("LayerElement");
-            leExtra.AddChild("Type", "LayerElementUV");
-            leExtra.AddChild("TypedIndex", int32_t(lr));
-            layerExtra.AddChild(leExtra);
-            layerExtra.Dump(outstream, binary, indent);
-        }
-        // finish the node record
-        indent = 1;
-        n.End(outstream, binary, indent, true);
-    }
-
-
-    // aiMaterial
-    material_uids.clear();
-    for (size_t i = 0; i < mScene->mNumMaterials; ++i) {
-        // it's all about this material
-        aiMaterial* m = mScene->mMaterials[i];
-
-        // these are used to receive material data
-        float f; aiColor3D c;
-
-        // start the node record
-        FBX::Node n("Material");
-
-        int64_t uid = generate_uid();
-        material_uids.push_back(uid);
-        n.AddProperty(uid);
-
-        aiString name;
-        m->Get(AI_MATKEY_NAME, name);
-        n.AddProperty(name.C_Str() + FBX::SEPARATOR + "Material");
-
-        n.AddProperty("");
-
-        n.AddChild("Version", int32_t(102));
-        f = 0;
-        m->Get(AI_MATKEY_SHININESS, f);
-        bool phong = (f > 0);
-        if (phong) {
-            n.AddChild("ShadingModel", "phong");
-        } else {
-            n.AddChild("ShadingModel", "lambert");
-        }
-        n.AddChild("MultiLayer", int32_t(0));
-
-        FBX::Node p("Properties70");
-
-        // materials exported using the FBX SDK have two sets of fields.
-        // there are the properties specified in the PropertyTemplate,
-        // which are those supported by the modernFBX SDK,
-        // and an extra set of properties with simpler names.
-        // The extra properties are a legacy material system from pre-2009.
-        //
-        // In the modern system, each property has "color" and "factor".
-        // Generally the interpretation of these seems to be
-        // that the colour is multiplied by the factor before use,
-        // but this is not always clear-cut.
-        //
-        // Usually assimp only stores the colour,
-        // so we can just leave the factors at the default "1.0".
-
-        // first we can export the "standard" properties
-        if (m->Get(AI_MATKEY_COLOR_AMBIENT, c) == aiReturn_SUCCESS) {
-            p.AddP70colorA("AmbientColor", c.r, c.g, c.b);
-            //p.AddP70numberA("AmbientFactor", 1.0);
-        }
-        if (m->Get(AI_MATKEY_COLOR_DIFFUSE, c) == aiReturn_SUCCESS) {
-            p.AddP70colorA("DiffuseColor", c.r, c.g, c.b);
-            //p.AddP70numberA("DiffuseFactor", 1.0);
-        }
-        if (m->Get(AI_MATKEY_COLOR_TRANSPARENT, c) == aiReturn_SUCCESS) {
-            // "TransparentColor" / "TransparencyFactor"...
-            // thanks FBX, for your insightful interpretation of consistency
-            p.AddP70colorA("TransparentColor", c.r, c.g, c.b);
-            // TransparencyFactor defaults to 0.0, so set it to 1.0.
-            // note: Maya always sets this to 1.0,
-            // so we can't use it sensibly as "Opacity".
-            // In stead we rely on the legacy "Opacity" value, below.
-            // Blender also relies on "Opacity" not "TransparencyFactor",
-            // probably for a similar reason.
-            p.AddP70numberA("TransparencyFactor", 1.0);
-        }
-        if (m->Get(AI_MATKEY_COLOR_REFLECTIVE, c) == aiReturn_SUCCESS) {
-            p.AddP70colorA("ReflectionColor", c.r, c.g, c.b);
-        }
-        if (m->Get(AI_MATKEY_REFLECTIVITY, f) == aiReturn_SUCCESS) {
-            p.AddP70numberA("ReflectionFactor", f);
-        }
-        if (phong) {
-            if (m->Get(AI_MATKEY_COLOR_SPECULAR, c) == aiReturn_SUCCESS) {
-                p.AddP70colorA("SpecularColor", c.r, c.g, c.b);
-            }
-            if (m->Get(AI_MATKEY_SHININESS_STRENGTH, f) == aiReturn_SUCCESS) {
-                p.AddP70numberA("ShininessFactor", f);
-            }
-            if (m->Get(AI_MATKEY_SHININESS, f) == aiReturn_SUCCESS) {
-                p.AddP70numberA("ShininessExponent", f);
-            }
-            if (m->Get(AI_MATKEY_REFLECTIVITY, f) == aiReturn_SUCCESS) {
-                p.AddP70numberA("ReflectionFactor", f);
-            }
-        }
-
-        // Now the legacy system.
-        // For safety let's include it.
-        // thrse values don't exist in the property template,
-        // and usually are completely ignored when loading.
-        // One notable exception is the "Opacity" property,
-        // which Blender uses as (1.0 - alpha).
-        c.r = 0.0f; c.g = 0.0f; c.b = 0.0f;
-        m->Get(AI_MATKEY_COLOR_EMISSIVE, c);
-        p.AddP70vector("Emissive", c.r, c.g, c.b);
-        c.r = 0.2f; c.g = 0.2f; c.b = 0.2f;
-        m->Get(AI_MATKEY_COLOR_AMBIENT, c);
-        p.AddP70vector("Ambient", c.r, c.g, c.b);
-        c.r = 0.8f; c.g = 0.8f; c.b = 0.8f;
-        m->Get(AI_MATKEY_COLOR_DIFFUSE, c);
-        p.AddP70vector("Diffuse", c.r, c.g, c.b);
-        // The FBX SDK determines "Opacity" from transparency colour (RGB)
-        // and factor (F) as: O = (1.0 - F * ((R + G + B) / 3)).
-        // However we actually have an opacity value,
-        // so we should take it from AI_MATKEY_OPACITY if possible.
-        // It might make more sense to use TransparencyFactor,
-        // but Blender actually loads "Opacity" correctly, so let's use it.
-        f = 1.0f;
-        if (m->Get(AI_MATKEY_COLOR_TRANSPARENT, c) == aiReturn_SUCCESS) {
-            f = 1.0f - ((c.r + c.g + c.b) / 3.0f);
-        }
-        m->Get(AI_MATKEY_OPACITY, f);
-        p.AddP70double("Opacity", f);
-        if (phong) {
-            // specular color is multiplied by shininess_strength
-            c.r = 0.2f; c.g = 0.2f; c.b = 0.2f;
-            m->Get(AI_MATKEY_COLOR_SPECULAR, c);
-            f = 1.0f;
-            m->Get(AI_MATKEY_SHININESS_STRENGTH, f);
-            p.AddP70vector("Specular", f*c.r, f*c.g, f*c.b);
-            f = 20.0f;
-            m->Get(AI_MATKEY_SHININESS, f);
-            p.AddP70double("Shininess", f);
-            // Legacy "Reflectivity" is F*F*((R+G+B)/3),
-            // where F is the proportion of light reflected (AKA reflectivity),
-            // and RGB is the reflective colour of the material.
-            // No idea why, but we might as well set it the same way.
-            f = 0.0f;
-            m->Get(AI_MATKEY_REFLECTIVITY, f);
-            c.r = 1.0f, c.g = 1.0f, c.b = 1.0f;
-            m->Get(AI_MATKEY_COLOR_REFLECTIVE, c);
-            p.AddP70double("Reflectivity", f*f*((c.r+c.g+c.b)/3.0));
-        }
-
-        n.AddChild(p);
-
-        n.Dump(outstream, binary, indent);
-    }
-
-    // we need to look up all the images we're using,
-    // so we can generate uids, and eliminate duplicates.
-    std::map<std::string, int64_t> uid_by_image;
-    for (size_t i = 0; i < mScene->mNumMaterials; ++i) {
-        aiString texpath;
-        aiMaterial* mat = mScene->mMaterials[i];
-        for (
-            size_t tt = aiTextureType_DIFFUSE;
-            tt < aiTextureType_UNKNOWN;
-            ++tt
-        ){
-            const aiTextureType textype = static_cast<aiTextureType>(tt);
-            const size_t texcount = mat->GetTextureCount(textype);
-            for (size_t j = 0; j < texcount; ++j) {
-                mat->GetTexture(textype, (unsigned int)j, &texpath);
-                const std::string texstring = texpath.C_Str();
-                auto elem = uid_by_image.find(texstring);
-                if (elem == uid_by_image.end()) {
-                    uid_by_image[texstring] = generate_uid();
-                }
-            }
-        }
-    }
-
-    // FbxVideo - stores images used by textures.
-    for (const auto &it : uid_by_image) {
-        FBX::Node n("Video");
-        const int64_t& uid = it.second;
-        const std::string name = ""; // TODO: ... name???
-        n.AddProperties(uid, name + FBX::SEPARATOR + "Video", "Clip");
-        n.AddChild("Type", "Clip");
-        FBX::Node p("Properties70");
-        // TODO: get full path... relative path... etc... ugh...
-        // for now just use the same path for everything,
-        // and hopefully one of them will work out.
-        std::string path = it.first;
-        // try get embedded texture
-        const aiTexture* embedded_texture = mScene->GetEmbeddedTexture(it.first.c_str());
-        if (embedded_texture != nullptr) {
-            // change the path (use original filename, if available. If name is empty, concatenate texture index with file extension)
-            std::stringstream newPath;
-            if (embedded_texture->mFilename.length > 0) {
-                newPath << embedded_texture->mFilename.C_Str();
-            } else if (embedded_texture->achFormatHint[0]) {
-                int texture_index = std::stoi(path.substr(1, path.size() - 1));
-                newPath << texture_index << "." << embedded_texture->achFormatHint;
-            }
-            path = newPath.str();
-            // embed the texture
-            size_t texture_size = static_cast<size_t>(embedded_texture->mWidth * std::max(embedded_texture->mHeight, 1u));
-            if (binary) {
-                // embed texture as binary data
-                std::vector<uint8_t> tex_data;
-                tex_data.resize(texture_size);
-                memcpy(&tex_data[0], (char*)embedded_texture->pcData, texture_size);
-                n.AddChild("Content", tex_data);
-            } else {
-                // embed texture in base64 encoding
-                std::string encoded_texture = FBX::Util::EncodeBase64((char*)embedded_texture->pcData, texture_size);
-                n.AddChild("Content", encoded_texture);
-            }
-        }
-        p.AddP70("Path", "KString", "XRefUrl", "", path);
-        n.AddChild(p);
-        n.AddChild("UseMipMap", int32_t(0));
-        n.AddChild("Filename", path);
-        n.AddChild("RelativeFilename", path);
-        n.Dump(outstream, binary, indent);
-    }
-
-    // Textures
-    // referenced by material_index/texture_type pairs.
-    std::map<std::pair<size_t,size_t>,int64_t> texture_uids;
-    const std::map<aiTextureType,std::string> prop_name_by_tt = {
-        {aiTextureType_DIFFUSE,      "DiffuseColor"},
-        {aiTextureType_SPECULAR,     "SpecularColor"},
-        {aiTextureType_AMBIENT,      "AmbientColor"},
-        {aiTextureType_EMISSIVE,     "EmissiveColor"},
-        {aiTextureType_HEIGHT,       "Bump"},
-        {aiTextureType_NORMALS,      "NormalMap"},
-        {aiTextureType_SHININESS,    "ShininessExponent"},
-        {aiTextureType_OPACITY,      "TransparentColor"},
-        {aiTextureType_DISPLACEMENT, "DisplacementColor"},
-        //{aiTextureType_LIGHTMAP, "???"},
-        {aiTextureType_REFLECTION,   "ReflectionColor"}
-        //{aiTextureType_UNKNOWN, ""}
-    };
-    for (size_t i = 0; i < mScene->mNumMaterials; ++i) {
-        // textures are attached to materials
-        aiMaterial* mat = mScene->mMaterials[i];
-        int64_t material_uid = material_uids[i];
-
-        for (
-            size_t j = aiTextureType_DIFFUSE;
-            j < aiTextureType_UNKNOWN;
-            ++j
-        ) {
-            const aiTextureType tt = static_cast<aiTextureType>(j);
-            size_t n = mat->GetTextureCount(tt);
-
-            if (n < 1) { // no texture of this type
-                continue;
-            }
-
-            if (n > 1) {
-                // TODO: multilayer textures
-                std::stringstream err;
-                err << "Multilayer textures not supported (for now),";
-                err << " skipping texture type " << j;
-                err << " of material " << i;
-                ASSIMP_LOG_WARN(err.str());
-            }
-
-            // get image path for this (single-image) texture
-            aiString tpath;
-            if (mat->GetTexture(tt, 0, &tpath) != aiReturn_SUCCESS) {
-                std::stringstream err;
-                err << "Failed to get texture 0 for texture of type " << tt;
-                err << " on material " << i;
-                err << ", however GetTextureCount returned 1.";
-                throw DeadlyExportError(err.str());
-            }
-            const std::string texture_path(tpath.C_Str());
-
-            // get connected image uid
-            auto elem = uid_by_image.find(texture_path);
-            if (elem == uid_by_image.end()) {
-                // this should never happen
-                std::stringstream err;
-                err << "Failed to find video element for texture with path";
-                err << " \"" << texture_path << "\"";
-                err << ", type " << j << ", material " << i;
-                throw DeadlyExportError(err.str());
-            }
-            const int64_t image_uid = elem->second;
-
-            // get the name of the material property to connect to
-            auto elem2 = prop_name_by_tt.find(tt);
-            if (elem2 == prop_name_by_tt.end()) {
-                // don't know how to handle this type of texture,
-                // so skip it.
-                std::stringstream err;
-                err << "Not sure how to handle texture of type " << j;
-                err << " on material " << i;
-                err << ", skipping...";
-                ASSIMP_LOG_WARN(err.str());
-                continue;
-            }
-            const std::string& prop_name = elem2->second;
-
-            // generate a uid for this texture
-            const int64_t texture_uid = generate_uid();
-
-            // link the texture to the material
-            connections.emplace_back(
-                "C", "OP", texture_uid, material_uid, prop_name
-            );
-
-            // link the image data to the texture
-            connections.emplace_back("C", "OO", image_uid, texture_uid);
-
-            aiUVTransform trafo;
-            unsigned int max = sizeof(aiUVTransform);
-            aiGetMaterialFloatArray(mat, AI_MATKEY_UVTRANSFORM(aiTextureType_DIFFUSE, 0), (ai_real *)&trafo, &max);
-
-            // now write the actual texture node
-            FBX::Node tnode("Texture");
-            // TODO: some way to determine texture name?
-            const std::string texture_name = "" + FBX::SEPARATOR + "Texture";
-            tnode.AddProperties(texture_uid, texture_name, "");
-            // there really doesn't seem to be a better type than this:
-            tnode.AddChild("Type", "TextureVideoClip");
-            tnode.AddChild("Version", int32_t(202));
-            tnode.AddChild("TextureName", texture_name);
-            FBX::Node p("Properties70");
-            p.AddP70vectorA("Translation", trafo.mTranslation[0], trafo.mTranslation[1], 0.0);
-            p.AddP70vectorA("Rotation", 0, 0, trafo.mRotation);
-            p.AddP70vectorA("Scaling", trafo.mScaling[0], trafo.mScaling[1], 0.0);
-            p.AddP70enum("CurrentTextureBlendMode", 0); // TODO: verify
-            //p.AddP70string("UVSet", ""); // TODO: how should this work?
-            p.AddP70bool("UseMaterial", 1);
-            tnode.AddChild(p);
-            // can't easily determine which texture path will be correct,
-            // so just store what we have in every field.
-            // these being incorrect is a common problem with FBX anyway.
-            tnode.AddChild("FileName", texture_path);
-            tnode.AddChild("RelativeFilename", texture_path);
-            tnode.AddChild("ModelUVTranslation", double(0.0), double(0.0));
-            tnode.AddChild("ModelUVScaling", double(1.0), double(1.0));
-            tnode.AddChild("Texture_Alpha_Source", "None");
-            tnode.AddChild(
-                "Cropping", int32_t(0), int32_t(0), int32_t(0), int32_t(0)
-            );
-            tnode.Dump(outstream, binary, indent);
-        }
-    }
-
-    // Blendshapes, if any
-    for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) {
-      const aiMesh* m = mScene->mMeshes[mi];
-      if (m->mNumAnimMeshes == 0) {
-        continue;
-      }
-      // make a deformer for this mesh
-      int64_t deformer_uid = generate_uid();
-      FBX::Node dnode("Deformer");
-      dnode.AddProperties(deformer_uid, m->mName.data + FBX::SEPARATOR + "Blendshapes", "BlendShape");
-      dnode.AddChild("Version", int32_t(101));
-      dnode.Dump(outstream, binary, indent);
-      // connect it
-      connections.emplace_back("C", "OO", deformer_uid, mesh_uids[mi]);
-      std::vector<int32_t> vertex_indices = vVertexIndice[mi];
-
-      for (unsigned int am = 0; am < m->mNumAnimMeshes; ++am) {
-        aiAnimMesh *pAnimMesh = m->mAnimMeshes[am];
-        std::string blendshape_name = pAnimMesh->mName.data;
-
-        // start the node record
-        FBX::Node bsnode("Geometry");
-        int64_t blendshape_uid = generate_uid();
-        mesh_uids.push_back(blendshape_uid);
-        bsnode.AddProperty(blendshape_uid);
-        bsnode.AddProperty(blendshape_name + FBX::SEPARATOR + "Blendshape");
-        bsnode.AddProperty("Shape");
-        bsnode.AddChild("Version", int32_t(100));
-        bsnode.Begin(outstream, binary, indent);
-        bsnode.DumpProperties(outstream, binary, indent);
-        bsnode.EndProperties(outstream, binary, indent);
-        bsnode.BeginChildren(outstream, binary, indent);
-        indent++;
-        if (pAnimMesh->HasPositions()) {
-          std::vector<int32_t>shape_indices;
-          std::vector<double>pPositionDiff;
-          std::vector<double>pNormalDiff;
-
-          for (unsigned int vt = 0; vt < vertex_indices.size(); ++vt) {
-              aiVector3D pDiff = (pAnimMesh->mVertices[vertex_indices[vt]] - m->mVertices[vertex_indices[vt]]);
-              if(pDiff.Length()>1e-8){
-                shape_indices.push_back(vertex_indices[vt]);
-                pPositionDiff.push_back(pDiff[0]);
-                pPositionDiff.push_back(pDiff[1]);
-                pPositionDiff.push_back(pDiff[2]);
-
-                if (pAnimMesh->HasNormals()) {
-                    aiVector3D nDiff = (pAnimMesh->mNormals[vertex_indices[vt]] - m->mNormals[vertex_indices[vt]]);
-                    pNormalDiff.push_back(nDiff[0]);
-                    pNormalDiff.push_back(nDiff[1]);
-                    pNormalDiff.push_back(nDiff[2]);
-                }
-              }
-          }
-
-          FBX::Node::WritePropertyNode(
-              "Indexes", shape_indices, outstream, binary, indent
-          );
-
-          FBX::Node::WritePropertyNode(
-              "Vertices", pPositionDiff, outstream, binary, indent
-          );
-
-          if (pNormalDiff.size()>0) {
-            FBX::Node::WritePropertyNode(
-                "Normals", pNormalDiff, outstream, binary, indent
-            );
-          }
-        }
-        indent--;
-        bsnode.End(outstream, binary, indent, true);
-
-        // Add blendshape Channel Deformer
-        FBX::Node sdnode("Deformer");
-        const int64_t blendchannel_uid = generate_uid();
-        sdnode.AddProperties(
-            blendchannel_uid, blendshape_name + FBX::SEPARATOR + "SubDeformer", "BlendShapeChannel"
-        );
-        sdnode.AddChild("Version", int32_t(100));
-        sdnode.AddChild("DeformPercent", float(0.0));
-        FBX::Node p("Properties70");
-        p.AddP70numberA("DeformPercent", 0.0);
-        sdnode.AddChild(p);
-        // TODO: Normally just one weight per channel, adding stub for later development
-        std::vector<float>fFullWeights;
-        fFullWeights.push_back(100.);
-        sdnode.AddChild("FullWeights", fFullWeights);
-        sdnode.Dump(outstream, binary, indent);
-
-        connections.emplace_back("C", "OO", blendchannel_uid, deformer_uid);
-        connections.emplace_back("C", "OO", blendshape_uid, blendchannel_uid);
-      }
-    }
-
-    // bones.
-    //
-    // output structure:
-    // subset of node hierarchy that are "skeleton",
-    // i.e. do not have meshes but only bones.
-    // but.. i'm not sure how anyone could guarantee that...
-    //
-    // input...
-    // well, for each mesh it has "bones",
-    // and the bone names correspond to nodes.
-    // of course we also need the parent nodes,
-    // as they give some of the transform........
-    //
-    // well. we can assume a sane input, i suppose.
-    //
-    // so input is the bone node hierarchy,
-    // with an extra thing for the transformation of the MESH in BONE space.
-    //
-    // output is a set of bone nodes,
-    // a "bindpose" which indicates the default local transform of all bones,
-    // and a set of "deformers".
-    // each deformer is parented to a mesh geometry,
-    // and has one or more "subdeformer"s as children.
-    // each subdeformer has one bone node as a child,
-    // and represents the influence of that bone on the grandparent mesh.
-    // the subdeformer has a list of indices, and weights,
-    // with indices specifying vertex indices,
-    // and weights specifying the corresponding influence of this bone.
-    // it also has Transform and TransformLink elements,
-    // specifying the transform of the MESH in BONE space,
-    // and the transformation of the BONE in WORLD space,
-    // likely in the bindpose.
-    //
-    // the input bone structure is different but similar,
-    // storing the number of weights for this bone,
-    // and an array of (vertex index, weight) pairs.
-    //
-    // one sticky point is that the number of vertices may not match,
-    // because assimp splits vertices by normal, uv, etc.
-
-    // functor for aiNode sorting
-    struct SortNodeByName
-    {
-        bool operator()(const aiNode *lhs, const aiNode *rhs) const
-        {
-            return strcmp(lhs->mName.C_Str(), rhs->mName.C_Str()) < 0;
-        }
-    };
-
-    // first we should mark the skeleton for each mesh.
-    // the skeleton must include not only the aiBones,
-    // but also all their parent nodes.
-    // anything that affects the position of any bone node must be included.
-    // Use SorNodeByName to make sure the exported result will be the same across all systems
-    // Otherwise the aiNodes of the skeleton would be sorted based on the pointer address, which isn't consistent
-    std::vector<std::set<const aiNode*, SortNodeByName>> skeleton_by_mesh(mScene->mNumMeshes);
-    // at the same time we can build a list of all the skeleton nodes,
-    // which will be used later to mark them as type "limbNode".
-    std::unordered_set<const aiNode*> limbnodes;
-
-    //actual bone nodes in fbx, without parenting-up
-    std::unordered_set<std::string> setAllBoneNamesInScene;
-    for(unsigned int m = 0; m < mScene->mNumMeshes; ++ m)
-    {
-        aiMesh* pMesh = mScene->mMeshes[m];
-        for(unsigned int b = 0; b < pMesh->mNumBones; ++ b)
-            setAllBoneNamesInScene.insert(pMesh->mBones[b]->mName.data);
-    }
-    aiMatrix4x4 mxTransIdentity;
-
-    // and a map of nodes by bone name, as finding them is annoying.
-    std::map<std::string,aiNode*> node_by_bone;
-    for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) {
-        const aiMesh* m = mScene->mMeshes[mi];
-        std::set<const aiNode*, SortNodeByName> skeleton;
-        for (size_t bi =0; bi < m->mNumBones; ++bi) {
-            const aiBone* b = m->mBones[bi];
-            const std::string name(b->mName.C_Str());
-            auto elem = node_by_bone.find(name);
-            aiNode* n;
-            if (elem != node_by_bone.end()) {
-                n = elem->second;
-            } else {
-                n = mScene->mRootNode->FindNode(b->mName);
-                if (!n) {
-                    // this should never happen
-                    std::stringstream err;
-                    err << "Failed to find node for bone: \"" << name << "\"";
-                    throw DeadlyExportError(err.str());
-                }
-                node_by_bone[name] = n;
-                limbnodes.insert(n);
-            }
-            skeleton.insert(n);
-            // mark all parent nodes as skeleton as well,
-            // up until we find the root node,
-            // or else the node containing the mesh,
-            // or else the parent of a node containing the mesh.
-            for (
-                const aiNode* parent = n->mParent;
-                parent && parent != mScene->mRootNode;
-                parent = parent->mParent
-            ) {
-                // if we've already done this node we can skip it all
-                if (skeleton.count(parent)) {
-                    break;
-                }
-                // ignore fbx transform nodes as these will be collapsed later
-                // TODO: cache this by aiNode*
-                const std::string node_name(parent->mName.C_Str());
-                if (node_name.find(MAGIC_NODE_TAG) != std::string::npos) {
-                    continue;
-                }
-                //not a bone in scene && no effect in transform
-                if(setAllBoneNamesInScene.find(node_name)==setAllBoneNamesInScene.end()
-                   && parent->mTransformation == mxTransIdentity) {
-                        continue;
-                }
-                // otherwise check if this is the root of the skeleton
-                bool end = false;
-                // is the mesh part of this node?
-                for (size_t i = 0; i < parent->mNumMeshes; ++i) {
-                    if (parent->mMeshes[i] == mi) {
-                        end = true;
-                        break;
-                    }
-                }
-                // is the mesh in one of the children of this node?
-                for (size_t j = 0; j < parent->mNumChildren; ++j) {
-                    aiNode* child = parent->mChildren[j];
-                    for (size_t i = 0; i < child->mNumMeshes; ++i) {
-                        if (child->mMeshes[i] == mi) {
-                            end = true;
-                            break;
-                        }
-                    }
-                    if (end) { break; }
-                }
-
-                // if it was the skeleton root we can finish here
-                if (end) { break; }
-            }
-        }
-        skeleton_by_mesh[mi] = skeleton;
-    }
-
-    // we'll need the uids for the bone nodes, so generate them now
-    for (size_t i = 0; i < mScene->mNumMeshes; ++i) {
-        auto &s = skeleton_by_mesh[i];
-        for (const aiNode* n : s) {
-            auto elem = node_uids.find(n);
-            if (elem == node_uids.end()) {
-                node_uids[n] = generate_uid();
-            }
-        }
-    }
-
-    // now, for each aiMesh, we need to export a deformer,
-    // and for each aiBone a subdeformer,
-    // which should have all the skinning info.
-    // these will need to be connected properly to the mesh,
-    // and we can do that all now.
-    for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) {
-        const aiMesh* m = mScene->mMeshes[mi];
-        if (!m->HasBones()) {
-            continue;
-        }
-        // make a deformer for this mesh
-        int64_t deformer_uid = generate_uid();
-        FBX::Node dnode("Deformer");
-        dnode.AddProperties(deformer_uid, FBX::SEPARATOR + "Deformer", "Skin");
-        dnode.AddChild("Version", int32_t(101));
-        // "acuracy"... this is not a typo....
-        dnode.AddChild("Link_DeformAcuracy", double(50));
-        dnode.AddChild("SkinningType", "Linear"); // TODO: other modes?
-        dnode.Dump(outstream, binary, indent);
-
-        // connect it
-        connections.emplace_back("C", "OO", deformer_uid, mesh_uids[mi]);
-
-        //computed before
-        std::vector<int32_t>& vertex_indices = vVertexIndice[mi];
-
-        // TODO, FIXME: this won't work if anything is not in the bind pose.
-        // for now if such a situation is detected, we throw an exception.
-        std::set<const aiBone*> not_in_bind_pose;
-        std::set<const aiNode*> no_offset_matrix;
-
-        // first get this mesh's position in world space,
-        // as we'll need it for each subdeformer.
-        //
-        // ...of course taking the position of the MESH doesn't make sense,
-        // as it can be instanced to many nodes.
-        // All we can do is assume no instancing,
-        // and take the first node we find that contains the mesh.
-        aiNode* mesh_node = get_node_for_mesh((unsigned int)mi, mScene->mRootNode);
-        aiMatrix4x4 mesh_xform = get_world_transform(mesh_node, mScene);
-
-        // now make a subdeformer for each bone in the skeleton
-        const std::set<const aiNode*, SortNodeByName> skeleton= skeleton_by_mesh[mi];
-        for (const aiNode* bone_node : skeleton) {
-            // if there's a bone for this node, find it
-            const aiBone* b = nullptr;
-            for (size_t bi = 0; bi < m->mNumBones; ++bi) {
-                // TODO: this probably should index by something else
-                const std::string name(m->mBones[bi]->mName.C_Str());
-                if (node_by_bone[name] == bone_node) {
-                    b = m->mBones[bi];
-                    break;
-                }
-            }
-            if (!b) {
-                no_offset_matrix.insert(bone_node);
-            }
-
-            // start the subdeformer node
-            const int64_t subdeformer_uid = generate_uid();
-            FBX::Node sdnode("Deformer");
-            sdnode.AddProperties(
-                subdeformer_uid, FBX::SEPARATOR + "SubDeformer", "Cluster"
-            );
-            sdnode.AddChild("Version", int32_t(100));
-            sdnode.AddChild("UserData", "", "");
-
-            std::set<int32_t> setWeightedVertex;
-            // add indices and weights, if any
-            if (b) {
-                std::vector<int32_t> subdef_indices;
-                std::vector<double> subdef_weights;
-                int32_t last_index = -1;
-                for (size_t wi = 0; wi < b->mNumWeights; ++wi) {
-                    int32_t vi = vertex_indices[b->mWeights[wi].mVertexId];
-                    bool bIsWeightedAlready = (setWeightedVertex.find(vi) != setWeightedVertex.end());
-                    if (vi == last_index || bIsWeightedAlready) {
-                        // only for vertices we exported to fbx
-                        // TODO, FIXME: this assumes identically-located vertices
-                        // will always deform in the same way.
-                        // as assimp doesn't store a separate list of "positions",
-                        // there's not much that can be done about this
-                        // other than assuming that identical position means
-                        // identical vertex.
-                        continue;
-                    }
-                    setWeightedVertex.insert(vi);
-                    subdef_indices.push_back(vi);
-                    subdef_weights.push_back(b->mWeights[wi].mWeight);
-                    last_index = vi;
-                }
-                // yes, "indexes"
-                sdnode.AddChild("Indexes", subdef_indices);
-                sdnode.AddChild("Weights", subdef_weights);
-            }
-
-            // transform is the transform of the mesh, but in bone space.
-            // if the skeleton is in the bind pose,
-            // we can take the inverse of the world-space bone transform
-            // and multiply by the world-space transform of the mesh.
-            aiMatrix4x4 bone_xform = get_world_transform(bone_node, mScene);
-            aiMatrix4x4 inverse_bone_xform = bone_xform;
-            inverse_bone_xform.Inverse();
-            aiMatrix4x4 tr = inverse_bone_xform * mesh_xform;
-
-            sdnode.AddChild("Transform", tr);
-
-
-            sdnode.AddChild("TransformLink", bone_xform);
-            // note: this means we ALWAYS rely on the mesh node transform
-            // being unchanged from the time the skeleton was bound.
-            // there's not really any way around this at the moment.
-
-            // done
-            sdnode.Dump(outstream, binary, indent);
-
-            // lastly, connect to the parent deformer
-            connections.emplace_back(
-                "C", "OO", subdeformer_uid, deformer_uid
-            );
-
-            // we also need to connect the limb node to the subdeformer.
-            connections.emplace_back(
-                "C", "OO", node_uids[bone_node], subdeformer_uid
-            );
-        }
-
-        // if we cannot create a valid FBX file, simply die.
-        // this will both prevent unnecessary bug reports,
-        // and tell the user what they can do to fix the situation
-        // (i.e. export their model in the bind pose).
-        if (no_offset_matrix.size() && not_in_bind_pose.size()) {
-            std::stringstream err;
-            err << "Not enough information to construct bind pose";
-            err << " for mesh " << mi << "!";
-            err << " Transform matrix for bone \"";
-            err << (*not_in_bind_pose.begin())->mName.C_Str() << "\"";
-            if (not_in_bind_pose.size() > 1) {
-                err << " (and " << not_in_bind_pose.size() - 1 << " more)";
-            }
-            err << " does not match mOffsetMatrix,";
-            err << " and node \"";
-            err << (*no_offset_matrix.begin())->mName.C_Str() << "\"";
-            if (no_offset_matrix.size() > 1) {
-                err << " (and " << no_offset_matrix.size() - 1 << " more)";
-            }
-            err << " has no offset matrix to rely on.";
-            err << " Please ensure bones are in the bind pose to export.";
-            throw DeadlyExportError(err.str());
-        }
-
-    }
-
-    // BindPose
-    //
-    // This is a legacy system, which should be unnecessary.
-    //
-    // Somehow including it slows file loading by the official FBX SDK,
-    // and as it can reconstruct it from the deformers anyway,
-    // this is not currently included.
-    //
-    // The code is kept here in case it's useful in the future,
-    // but it's pretty much a hack anyway,
-    // as assimp doesn't store bindpose information for full skeletons.
-    //
-    /*for (size_t mi = 0; mi < mScene->mNumMeshes; ++mi) {
-        aiMesh* mesh = mScene->mMeshes[mi];
-        if (! mesh->HasBones()) { continue; }
-        int64_t bindpose_uid = generate_uid();
-        FBX::Node bpnode("Pose");
-        bpnode.AddProperty(bindpose_uid);
-        // note: this uid is never linked or connected to anything.
-        bpnode.AddProperty(FBX::SEPARATOR + "Pose"); // blank name
-        bpnode.AddProperty("BindPose");
-
-        bpnode.AddChild("Type", "BindPose");
-        bpnode.AddChild("Version", int32_t(100));
-
-        aiNode* mesh_node = get_node_for_mesh(mi, mScene->mRootNode);
-
-        // next get the whole skeleton for this mesh.
-        // we need it all to define the bindpose section.
-        // the FBX SDK will complain if it's missing,
-        // and also if parents of used bones don't have a subdeformer.
-        // order shouldn't matter.
-        std::set<aiNode*> skeleton;
-        for (size_t bi = 0; bi < mesh->mNumBones; ++bi) {
-            // bone node should have already been indexed
-            const aiBone* b = mesh->mBones[bi];
-            const std::string bone_name(b->mName.C_Str());
-            aiNode* parent = node_by_bone[bone_name];
-            // insert all nodes down to the root or mesh node
-            while (
-                parent
-                && parent != mScene->mRootNode
-                && parent != mesh_node
-            ) {
-                skeleton.insert(parent);
-                parent = parent->mParent;
-            }
-        }
-
-        // number of pose nodes. includes one for the mesh itself.
-        bpnode.AddChild("NbPoseNodes", int32_t(1 + skeleton.size()));
-
-        // the first pose node is always the mesh itself
-        FBX::Node pose("PoseNode");
-        pose.AddChild("Node", mesh_uids[mi]);
-        aiMatrix4x4 mesh_node_xform = get_world_transform(mesh_node, mScene);
-        pose.AddChild("Matrix", mesh_node_xform);
-        bpnode.AddChild(pose);
-
-        for (aiNode* bonenode : skeleton) {
-            // does this node have a uid yet?
-            int64_t node_uid;
-            auto node_uid_iter = node_uids.find(bonenode);
-            if (node_uid_iter != node_uids.end()) {
-                node_uid = node_uid_iter->second;
-            } else {
-                node_uid = generate_uid();
-                node_uids[bonenode] = node_uid;
-            }
-
-            // make a pose thingy
-            pose = FBX::Node("PoseNode");
-            pose.AddChild("Node", node_uid);
-            aiMatrix4x4 node_xform = get_world_transform(bonenode, mScene);
-            pose.AddChild("Matrix", node_xform);
-            bpnode.AddChild(pose);
-        }
-
-        // now write it
-        bpnode.Dump(outstream, binary, indent);
-    }*/
-
-    // lights
-    indent = 1;
-    lights_uids.clear();
-    for (size_t li = 0; li < mScene->mNumLights; ++li) {
-        aiLight* l = mScene->mLights[li];
-
-        int64_t uid = generate_uid();
-        const std::string lightNodeAttributeName = l->mName.C_Str() + FBX::SEPARATOR + "NodeAttribute";
-
-        FBX::Node lna("NodeAttribute");
-        lna.AddProperties(uid, lightNodeAttributeName, "Light");
-        FBX::Node lnap("Properties70");
-
-        // Light color.
-        lnap.AddP70colorA("Color", l->mColorDiffuse.r, l->mColorDiffuse.g, l->mColorDiffuse.b);
-
-        // TODO Assimp light description is quite concise and do not handle light intensity.
-        // Default value to 1000W.
-        lnap.AddP70numberA("Intensity", 1000);
-
-        // FBXLight::EType conversion
-        switch (l->mType) {
-        case aiLightSource_POINT:
-            lnap.AddP70enum("LightType", 0);
-            break;
-        case aiLightSource_DIRECTIONAL:
-            lnap.AddP70enum("LightType", 1);
-            break;
-        case aiLightSource_SPOT:
-            lnap.AddP70enum("LightType", 2);
-            lnap.AddP70numberA("InnerAngle", AI_RAD_TO_DEG(l->mAngleInnerCone));
-            lnap.AddP70numberA("OuterAngle", AI_RAD_TO_DEG(l->mAngleOuterCone));
-            break;
-        // TODO Assimp do not handle 'area' nor 'volume' lights, but FBX does.
-        /*case aiLightSource_AREA:
-            lnap.AddP70enum("LightType", 3);
-            lnap.AddP70enum("AreaLightShape", 0); // 0=Rectangle, 1=Sphere
-            break;
-        case aiLightSource_VOLUME:
-            lnap.AddP70enum("LightType", 4);
-            break;*/
-        default:
-            break;
-        }
-
-        // Did not understood how to configure the decay so disabling attenuation.
-        lnap.AddP70enum("DecayType", 0);
-
-        // Dump to FBX stream
-        lna.AddChild(lnap);
-        lna.AddChild("TypeFlags", FBX::FBXExportProperty("Light"));
-        lna.AddChild("GeometryVersion", FBX::FBXExportProperty(int32_t(124)));
-        lna.Dump(outstream, binary, indent);
-
-        // Store name and uid (will be used later when parsing scene nodes)
-        lights_uids[l->mName.C_Str()] = uid;
-    }
-
-    // TODO: cameras
-
-    // write nodes (i.e. model hierarchy)
-    // start at root node
-    WriteModelNodes(
-        outstream, mScene->mRootNode, 0, limbnodes
-    );
-
-    // animations
-    //
-    // in FBX there are:
-    // * AnimationStack - corresponds to an aiAnimation
-    // * AnimationLayer - a combinable animation component
-    // * AnimationCurveNode - links the property to be animated
-    // * AnimationCurve - defines animation data for a single property value
-    //
-    // the CurveNode also provides the default value for a property,
-    // such as the X, Y, Z coordinates for animatable translation.
-    //
-    // the Curve only specifies values for one component of the property,
-    // so there will be a separate AnimationCurve for X, Y, and Z.
-    //
-    // Assimp has:
-    // * aiAnimation - basically corresponds to an AnimationStack
-    // * aiNodeAnim - defines all animation for one aiNode
-    // * aiVectorKey/aiQuatKey - define the keyframe data for T/R/S
-    //
-    // assimp has no equivalent for AnimationLayer,
-    // and these are flattened on FBX import.
-    // we can assume there will be one per AnimationStack.
-    //
-    // the aiNodeAnim contains all animation data for a single aiNode,
-    // which will correspond to three AnimationCurveNode's:
-    // one each for translation, rotation and scale.
-    // The data for each of these will be put in 9 AnimationCurve's,
-    // T.X, T.Y, T.Z, R.X, R.Y, R.Z, etc.
-
-    // AnimationStack / aiAnimation
-    std::vector<int64_t> animation_stack_uids(mScene->mNumAnimations);
-    for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) {
-        int64_t animstack_uid = generate_uid();
-        animation_stack_uids[ai] = animstack_uid;
-        const aiAnimation* anim = mScene->mAnimations[ai];
-
-        FBX::Node asnode("AnimationStack");
-        std::string name = anim->mName.C_Str() + FBX::SEPARATOR + "AnimStack";
-        asnode.AddProperties(animstack_uid, name, "");
-        FBX::Node p("Properties70");
-        p.AddP70time("LocalStart", 0); // assimp doesn't store this
-        p.AddP70time("LocalStop", to_ktime(anim->mDuration, anim));
-        p.AddP70time("ReferenceStart", 0);
-        p.AddP70time("ReferenceStop", to_ktime(anim->mDuration, anim));
-        asnode.AddChild(p);
-
-        // this node absurdly always pretends it has children
-        // (in this case it does, but just in case...)
-        asnode.force_has_children = true;
-        asnode.Dump(outstream, binary, indent);
-
-        // note: animation stacks are not connected to anything
-    }
-
-    // AnimationLayer - one per aiAnimation
-    std::vector<int64_t> animation_layer_uids(mScene->mNumAnimations);
-    for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) {
-        int64_t animlayer_uid = generate_uid();
-        animation_layer_uids[ai] = animlayer_uid;
-        FBX::Node alnode("AnimationLayer");
-        alnode.AddProperties(animlayer_uid, FBX::SEPARATOR + "AnimLayer", "");
-
-        // this node absurdly always pretends it has children
-        alnode.force_has_children = true;
-        alnode.Dump(outstream, binary, indent);
-
-        // connect to the relevant animstack
-        connections.emplace_back(
-            "C", "OO", animlayer_uid, animation_stack_uids[ai]
-        );
-    }
-
-    // AnimCurveNode - three per aiNodeAnim
-    std::vector<std::vector<std::array<int64_t,3>>> curve_node_uids;
-    for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) {
-        const aiAnimation* anim = mScene->mAnimations[ai];
-        const int64_t layer_uid = animation_layer_uids[ai];
-        std::vector<std::array<int64_t,3>> nodeanim_uids;
-        for (size_t nai = 0; nai < anim->mNumChannels; ++nai) {
-            const aiNodeAnim* na = anim->mChannels[nai];
-            // get the corresponding aiNode
-            const aiNode* node = mScene->mRootNode->FindNode(na->mNodeName);
-            // and its transform
-            const aiMatrix4x4 node_xfm = get_world_transform(node, mScene);
-            aiVector3D T, R, S;
-            node_xfm.Decompose(S, R, T);
-
-            // AnimationCurveNode uids
-            std::array<int64_t,3> ids;
-            ids[0] = generate_uid(); // T
-            ids[1] = generate_uid(); // R
-            ids[2] = generate_uid(); // S
-
-            // translation
-            WriteAnimationCurveNode(outstream,
-                ids[0], "T", T, "Lcl Translation",
-                layer_uid, node_uids[node]
-            );
-
-            // rotation
-            WriteAnimationCurveNode(outstream,
-                ids[1], "R", R, "Lcl Rotation",
-                layer_uid, node_uids[node]
-            );
-
-            // scale
-            WriteAnimationCurveNode(outstream,
-                ids[2], "S", S, "Lcl Scale",
-                layer_uid, node_uids[node]
-            );
-
-            // store the uids for later use
-            nodeanim_uids.push_back(ids);
-        }
-        curve_node_uids.push_back(nodeanim_uids);
-    }
-
-    // AnimCurve - defines actual keyframe data.
-    // there's a separate curve for every component of every vector,
-    // for example a transform curvenode will have separate X/Y/Z AnimCurve's
-    for (size_t ai = 0; ai < mScene->mNumAnimations; ++ai) {
-        const aiAnimation* anim = mScene->mAnimations[ai];
-        for (size_t nai = 0; nai < anim->mNumChannels; ++nai) {
-            const aiNodeAnim* na = anim->mChannels[nai];
-            // get the corresponding aiNode
-            const aiNode* node = mScene->mRootNode->FindNode(na->mNodeName);
-            // and its transform
-            const aiMatrix4x4 node_xfm = get_world_transform(node, mScene);
-            aiVector3D T, R, S;
-            node_xfm.Decompose(S, R, T);
-            const std::array<int64_t,3>& ids = curve_node_uids[ai][nai];
-
-            std::vector<int64_t> times;
-            std::vector<float> xval, yval, zval;
-
-            // position/translation
-            for (size_t ki = 0; ki < na->mNumPositionKeys; ++ki) {
-                const aiVectorKey& k = na->mPositionKeys[ki];
-                times.push_back(to_ktime(k.mTime));
-                xval.push_back(k.mValue.x);
-                yval.push_back(k.mValue.y);
-                zval.push_back(k.mValue.z);
-            }
-            // one curve each for X, Y, Z
-            WriteAnimationCurve(outstream, T.x, times, xval, ids[0], "d|X");
-            WriteAnimationCurve(outstream, T.y, times, yval, ids[0], "d|Y");
-            WriteAnimationCurve(outstream, T.z, times, zval, ids[0], "d|Z");
-
-            // rotation
-            times.clear(); xval.clear(); yval.clear(); zval.clear();
-            for (size_t ki = 0; ki < na->mNumRotationKeys; ++ki) {
-                const aiQuatKey& k = na->mRotationKeys[ki];
-                times.push_back(to_ktime(k.mTime));
-                // TODO: aiQuaternion method to convert to Euler...
-                aiMatrix4x4 m(k.mValue.GetMatrix());
-                aiVector3D qs, qr, qt;
-                m.Decompose(qs, qr, qt);
-                qr *= DEG;
-                xval.push_back(qr.x);
-                yval.push_back(qr.y);
-                zval.push_back(qr.z);
-            }
-            WriteAnimationCurve(outstream, R.x, times, xval, ids[1], "d|X");
-            WriteAnimationCurve(outstream, R.y, times, yval, ids[1], "d|Y");
-            WriteAnimationCurve(outstream, R.z, times, zval, ids[1], "d|Z");
-
-            // scaling/scale
-            times.clear(); xval.clear(); yval.clear(); zval.clear();
-            for (size_t ki = 0; ki < na->mNumScalingKeys; ++ki) {
-                const aiVectorKey& k = na->mScalingKeys[ki];
-                times.push_back(to_ktime(k.mTime));
-                xval.push_back(k.mValue.x);
-                yval.push_back(k.mValue.y);
-                zval.push_back(k.mValue.z);
-            }
-            WriteAnimationCurve(outstream, S.x, times, xval, ids[2], "d|X");
-            WriteAnimationCurve(outstream, S.y, times, yval, ids[2], "d|Y");
-            WriteAnimationCurve(outstream, S.z, times, zval, ids[2], "d|Z");
-        }
-    }
-
-    indent = 0;
-    object_node.End(outstream, binary, indent, true);
-}
-
-// convenience map of magic node name strings to FBX properties,
-// including the expected type of transform.
-const std::map<std::string,std::pair<std::string,char>> transform_types = {
-    {"Translation", {"Lcl Translation", 't'}},
-    {"RotationOffset", {"RotationOffset", 't'}},
-    {"RotationPivot", {"RotationPivot", 't'}},
-    {"PreRotation", {"PreRotation", 'r'}},
-    {"Rotation", {"Lcl Rotation", 'r'}},
-    {"PostRotation", {"PostRotation", 'r'}},
-    {"RotationPivotInverse", {"RotationPivotInverse", 'i'}},
-    {"ScalingOffset", {"ScalingOffset", 't'}},
-    {"ScalingPivot", {"ScalingPivot", 't'}},
-    {"Scaling", {"Lcl Scaling", 's'}},
-    {"ScalingPivotInverse", {"ScalingPivotInverse", 'i'}},
-    {"GeometricScaling", {"GeometricScaling", 's'}},
-    {"GeometricRotation", {"GeometricRotation", 'r'}},
-    {"GeometricTranslation", {"GeometricTranslation", 't'}},
-    {"GeometricTranslationInverse", {"GeometricTranslationInverse", 'i'}},
-    {"GeometricRotationInverse", {"GeometricRotationInverse", 'i'}},
-    {"GeometricScalingInverse", {"GeometricScalingInverse", 'i'}}
-};
-
-// write a single model node to the stream
-void FBXExporter::WriteModelNode(
-    StreamWriterLE& outstream,
-    bool,
-    const aiNode* node,
-    int64_t node_uid,
-    const std::string& type,
-    const std::vector<std::pair<std::string,aiVector3D>>& transform_chain,
-    TransformInheritance inherit_type
-){
-    const aiVector3D zero = {0, 0, 0};
-    const aiVector3D one = {1, 1, 1};
-    FBX::Node m("Model");
-    std::string name = node->mName.C_Str() + FBX::SEPARATOR + "Model";
-    m.AddProperties(node_uid, name, type);
-    m.AddChild("Version", int32_t(232));
-    FBX::Node p("Properties70");
-    p.AddP70bool("RotationActive", 1);
-    p.AddP70int("DefaultAttributeIndex", 0);
-    p.AddP70enum("InheritType", inherit_type);
-    if (transform_chain.empty()) {
-        // decompose 4x4 transform matrix into TRS
-        aiVector3D t, r, s;
-        node->mTransformation.Decompose(s, r, t);
-        if (t != zero) {
-            p.AddP70(
-                "Lcl Translation", "Lcl Translation", "", "A",
-                double(t.x), double(t.y), double(t.z)
-            );
-        }
-        if (r != zero) {
-            p.AddP70(
-                "Lcl Rotation", "Lcl Rotation", "", "A",
-                double(DEG*r.x), double(DEG*r.y), double(DEG*r.z)
-            );
-        }
-        if (s != one) {
-            p.AddP70(
-                "Lcl Scaling", "Lcl Scaling", "", "A",
-                double(s.x), double(s.y), double(s.z)
-            );
-        }
-    } else {
-        // apply the transformation chain.
-        // these transformation elements are created when importing FBX,
-        // which has a complex transformation hierarchy for each node.
-        // as such we can bake the hierarchy back into the node on export.
-        for (auto &item : transform_chain) {
-            auto elem = transform_types.find(item.first);
-            if (elem == transform_types.end()) {
-                // then this is a bug
-                std::stringstream err;
-                err << "unrecognized FBX transformation type: ";
-                err << item.first;
-                throw DeadlyExportError(err.str());
-            }
-            const std::string &cur_name = elem->second.first;
-            const aiVector3D &v = item.second;
-            if (cur_name.compare(0, 4, "Lcl ") == 0) {
-                // special handling for animatable properties
-                p.AddP70( cur_name, cur_name, "", "A", double(v.x), double(v.y), double(v.z) );
-            } else {
-                p.AddP70vector(cur_name, v.x, v.y, v.z);
-            }
-        }
-    }
-    m.AddChild(p);
-
-    // not sure what these are for,
-    // but they seem to be omnipresent
-    m.AddChild("Shading", FBXExportProperty(true));
-    m.AddChild("Culling", FBXExportProperty("CullingOff"));
-
-    m.Dump(outstream, binary, 1);
-}
-
-// wrapper for WriteModelNodes to create and pass a blank transform chain
-void FBXExporter::WriteModelNodes(
-    StreamWriterLE& s,
-    const aiNode* node,
-    int64_t parent_uid,
-    const std::unordered_set<const aiNode*>& limbnodes
-) {
-    std::vector<std::pair<std::string,aiVector3D>> chain;
-    WriteModelNodes(s, node, parent_uid, limbnodes, chain);
-}
-
-void FBXExporter::WriteModelNodes(
-    StreamWriterLE& outstream,
-    const aiNode* node,
-    int64_t parent_uid,
-    const std::unordered_set<const aiNode*>& limbnodes,
-    std::vector<std::pair<std::string,aiVector3D>>& transform_chain
-) {
-    // first collapse any expanded transformation chains created by FBX import.
-    std::string node_name(node->mName.C_Str());
-    if (node_name.find(MAGIC_NODE_TAG) != std::string::npos) {
-        auto pos = node_name.find(MAGIC_NODE_TAG) + MAGIC_NODE_TAG.size() + 1;
-        std::string type_name = node_name.substr(pos);
-        auto elem = transform_types.find(type_name);
-        if (elem == transform_types.end()) {
-            // then this is a bug and should be fixed
-            std::stringstream err;
-            err << "unrecognized FBX transformation node";
-            err << " of type " << type_name << " in node " << node_name;
-            throw DeadlyExportError(err.str());
-        }
-        aiVector3D t, r, s;
-        node->mTransformation.Decompose(s, r, t);
-        switch (elem->second.second) {
-        case 'i': // inverse
-            // we don't need to worry about the inverse matrices
-            break;
-        case 't': // translation
-            transform_chain.emplace_back(elem->first, t);
-            break;
-        case 'r': // rotation
-            r *= float(DEG);
-            transform_chain.emplace_back(elem->first, r);
-            break;
-        case 's': // scale
-            transform_chain.emplace_back(elem->first, s);
-            break;
-        default:
-            // this should never happen
-            std::stringstream err;
-            err << "unrecognized FBX transformation type code: ";
-            err << elem->second.second;
-            throw DeadlyExportError(err.str());
-        }
-        // now continue on to any child nodes
-        for (unsigned i = 0; i < node->mNumChildren; ++i) {
-            WriteModelNodes(
-                outstream,
-                node->mChildren[i],
-                parent_uid,
-                limbnodes,
-                transform_chain
-            );
-        }
-        return;
-    }
-
-    int64_t node_uid = 0;
-    // generate uid and connect to parent, if not the root node,
-    if (node != mScene->mRootNode) {
-        auto elem = node_uids.find(node);
-        if (elem != node_uids.end()) {
-            node_uid = elem->second;
-        } else {
-            node_uid = generate_uid();
-            node_uids[node] = node_uid;
-        }
-        connections.emplace_back("C", "OO", node_uid, parent_uid);
-    }
-
-    // what type of node is this?
-    if (node == mScene->mRootNode) {
-        // handled later
-    } else if (node->mNumMeshes == 1) {
-        // connect to child mesh, which should have been written previously
-        connections.emplace_back(
-            "C", "OO", mesh_uids[node->mMeshes[0]], node_uid
-        );
-        // also connect to the material for the child mesh
-        connections.emplace_back(
-            "C", "OO",
-            material_uids[mScene->mMeshes[node->mMeshes[0]]->mMaterialIndex],
-            node_uid
-        );
-        // write model node
-        WriteModelNode(
-            outstream, binary, node, node_uid, "Mesh", transform_chain
-        );
-    } else if (limbnodes.count(node)) {
-        WriteModelNode(
-            outstream, binary, node, node_uid, "LimbNode", transform_chain
-        );
-        // we also need to write a nodeattribute to mark it as a skeleton
-        int64_t node_attribute_uid = generate_uid();
-        FBX::Node na("NodeAttribute");
-        na.AddProperties(
-            node_attribute_uid, FBX::SEPARATOR + "NodeAttribute", "LimbNode"
-        );
-        na.AddChild("TypeFlags", FBXExportProperty("Skeleton"));
-        na.Dump(outstream, binary, 1);
-        // and connect them
-        connections.emplace_back("C", "OO", node_attribute_uid, node_uid);
-    } else {
-        const auto& lightIt = lights_uids.find(node->mName.C_Str());
-        if(lightIt != lights_uids.end()) {
-            // Node has a light connected to it.
-            WriteModelNode(
-                outstream, binary, node, node_uid, "Light", transform_chain
-            );
-            connections.emplace_back("C", "OO", lightIt->second, node_uid);
-        } else {
-            // generate a null node so we can add children to it
-            WriteModelNode(
-                outstream, binary, node, node_uid, "Null", transform_chain
-            );
-        }
-    }
-
-    // if more than one child mesh, make nodes for each mesh
-    if (node->mNumMeshes > 1 || node == mScene->mRootNode) {
-        for (size_t i = 0; i < node->mNumMeshes; ++i) {
-            // make a new model node
-            int64_t new_node_uid = generate_uid();
-            // connect to parent node
-            connections.emplace_back("C", "OO", new_node_uid, node_uid);
-            // connect to child mesh, which should have been written previously
-            connections.emplace_back(
-                "C", "OO", mesh_uids[node->mMeshes[i]], new_node_uid
-            );
-            // also connect to the material for the child mesh
-            connections.emplace_back(
-                "C", "OO",
-                material_uids[
-                    mScene->mMeshes[node->mMeshes[i]]->mMaterialIndex
-                ],
-                new_node_uid
-            );
-
-            aiNode new_node;
-            // take name from mesh name, if it exists
-            new_node.mName = mScene->mMeshes[node->mMeshes[i]]->mName;
-            // write model node
-            WriteModelNode(
-                outstream, binary, &new_node, new_node_uid, "Mesh", std::vector<std::pair<std::string,aiVector3D>>()
-            );
-        }
-    }
-
-    // now recurse into children
-    for (size_t i = 0; i < node->mNumChildren; ++i) {
-        WriteModelNodes(
-            outstream, node->mChildren[i], node_uid, limbnodes
-        );
-    }
-}
-
-void FBXExporter::WriteAnimationCurveNode(
-        StreamWriterLE &outstream,
-        int64_t uid,
-        const std::string &name, // "T", "R", or "S"
-        aiVector3D default_value,
-        const std::string &property_name, // "Lcl Translation" etc
-        int64_t layer_uid,
-        int64_t node_uid) {
-    FBX::Node n("AnimationCurveNode");
-    n.AddProperties(uid, name + FBX::SEPARATOR + "AnimCurveNode", "");
-    FBX::Node p("Properties70");
-    p.AddP70numberA("d|X", default_value.x);
-    p.AddP70numberA("d|Y", default_value.y);
-    p.AddP70numberA("d|Z", default_value.z);
-    n.AddChild(p);
-    n.Dump(outstream, binary, 1);
-    // connect to layer
-    this->connections.emplace_back("C", "OO", uid, layer_uid);
-    // connect to bone
-    this->connections.emplace_back("C", "OP", uid, node_uid, property_name);
-}
-
-void FBXExporter::WriteAnimationCurve(
-    StreamWriterLE& outstream,
-    double default_value,
-    const std::vector<int64_t>& times,
-    const std::vector<float>& values,
-    int64_t curvenode_uid,
-    const std::string& property_link // "d|X", "d|Y", etc
-) {
-    FBX::Node n("AnimationCurve");
-    int64_t curve_uid = generate_uid();
-    n.AddProperties(curve_uid, FBX::SEPARATOR + "AnimCurve", "");
-    n.AddChild("Default", default_value);
-    n.AddChild("KeyVer", int32_t(4009));
-    n.AddChild("KeyTime", times);
-    n.AddChild("KeyValueFloat", values);
-    // TODO: keyattr flags and data (STUB for now)
-    n.AddChild("KeyAttrFlags", std::vector<int32_t>{0});
-    n.AddChild("KeyAttrDataFloat", std::vector<float>{0,0,0,0});
-    n.AddChild(
-        "KeyAttrRefCount",
-        std::vector<int32_t>{static_cast<int32_t>(times.size())}
-    );
-    n.Dump(outstream, binary, 1);
-    this->connections.emplace_back(
-        "C", "OP", curve_uid, curvenode_uid, property_link
-    );
-}
-
-
-void FBXExporter::WriteConnections ()
-{
-    // we should have completed the connection graph already,
-    // so basically just dump it here
-    if (!binary) {
-        WriteAsciiSectionHeader("Object connections");
-    }
-    // TODO: comments with names in the ascii version
-    FBX::Node conn("Connections");
-    StreamWriterLE outstream(outfile);
-    conn.Begin(outstream, binary, 0);
-    conn.BeginChildren(outstream, binary, 0);
-    for (auto &n : connections) {
-        n.Dump(outstream, binary, 1);
-    }
-    conn.End(outstream, binary, 0, !connections.empty());
-    connections.clear();
-}
-
-#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
-#endif // ASSIMP_BUILD_NO_EXPORT
diff --git a/libs/assimp/code/AssetLib/FBX/FBXExporter.h b/libs/assimp/code/AssetLib/FBX/FBXExporter.h
deleted file mode 100644
index 659f936..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXExporter.h
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file FBXExporter.h
-* Declares the exporter class to write a scene to an fbx file
-*/
-#ifndef AI_FBXEXPORTER_H_INC
-#define AI_FBXEXPORTER_H_INC
-
-#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#include "FBXExportNode.h" // FBX::Node
-#include "FBXCommon.h" // FBX::TransformInheritance
-
-#include <assimp/types.h>
-//#include <assimp/material.h>
-#include <assimp/StreamWriter.h> // StreamWriterLE
-#include <assimp/Exceptional.h> // DeadlyExportError
-
-#include <vector>
-#include <map>
-#include <unordered_set>
-#include <memory> // shared_ptr
-#include <sstream> // stringstream
-
-struct aiScene;
-struct aiNode;
-struct aiLight;
-
-namespace Assimp {
-    class IOSystem;
-    class IOStream;
-    class ExportProperties;
-
-    // ---------------------------------------------------------------------
-    /** Helper class to export a given scene to an FBX file. */
-    // ---------------------------------------------------------------------
-    class FBXExporter
-    {
-    public:
-        /// Constructor for a specific scene to export
-        FBXExporter(const aiScene* pScene, const ExportProperties* pProperties);
-
-        // call one of these methods to export
-        void ExportBinary(const char* pFile, IOSystem* pIOSystem);
-        void ExportAscii(const char* pFile, IOSystem* pIOSystem);
-
-    private:
-        bool binary; // whether current export is in binary or ascii format
-        const aiScene* mScene; // the scene to export
-        const ExportProperties* mProperties; // currently unused
-        std::shared_ptr<IOStream> outfile; // file to write to
-
-        std::vector<FBX::Node> connections; // connection storage
-
-        std::vector<int64_t> mesh_uids;
-        std::vector<int64_t> material_uids;
-        std::map<const aiNode*,int64_t> node_uids;
-        std::map<std::string,int64_t> lights_uids;
-
-        // this crude unique-ID system is actually fine
-        int64_t last_uid = 999999;
-        int64_t generate_uid() { return ++last_uid; }
-
-        // binary files have a specific header and footer,
-        // in addition to the actual data
-        void WriteBinaryHeader();
-        void WriteBinaryFooter();
-
-        // ascii files have a comment at the top
-        void WriteAsciiHeader();
-
-        // WriteAllNodes does the actual export.
-        // It just calls all the Write<Section> methods below in order.
-        void WriteAllNodes();
-
-        // Methods to write individual sections.
-        // The order here matches the order inside an FBX file.
-        // Each method corresponds to a top-level FBX section,
-        // except WriteHeader which also includes some binary-only sections
-        // and WriteFooter which is binary data only.
-        void WriteHeaderExtension();
-        // WriteFileId(); // binary-only, included in WriteHeader
-        // WriteCreationTime(); // binary-only, included in WriteHeader
-        // WriteCreator(); // binary-only, included in WriteHeader
-        void WriteGlobalSettings();
-        void WriteDocuments();
-        void WriteReferences();
-        void WriteDefinitions();
-        void WriteObjects();
-        void WriteConnections();
-        // WriteTakes(); // deprecated since at least 2015 (fbx 7.4)
-
-        // helpers
-        void WriteAsciiSectionHeader(const std::string& title);
-        void WriteModelNodes(
-            Assimp::StreamWriterLE& s,
-            const aiNode* node,
-            int64_t parent_uid,
-            const std::unordered_set<const aiNode*>& limbnodes
-        );
-        void WriteModelNodes( // usually don't call this directly
-            StreamWriterLE& s,
-            const aiNode* node,
-            int64_t parent_uid,
-            const std::unordered_set<const aiNode*>& limbnodes,
-            std::vector<std::pair<std::string,aiVector3D>>& transform_chain
-        );
-        void WriteModelNode( // nor this
-            StreamWriterLE& s,
-            bool binary,
-            const aiNode* node,
-            int64_t node_uid,
-            const std::string& type,
-            const std::vector<std::pair<std::string,aiVector3D>>& xfm_chain,
-            FBX::TransformInheritance ti_type=FBX::TransformInheritance_RSrs
-        );
-        void WriteAnimationCurveNode(
-                StreamWriterLE &outstream,
-                int64_t uid,
-                const std::string &name, // "T", "R", or "S"
-                aiVector3D default_value,
-                const std::string &property_name, // "Lcl Translation" etc
-                int64_t animation_layer_uid,
-                int64_t node_uid);
-        void WriteAnimationCurve(
-            StreamWriterLE& outstream,
-            double default_value,
-            const std::vector<int64_t>& times,
-            const std::vector<float>& values,
-            int64_t curvenode_id,
-            const std::string& property_link // "d|X", "d|Y", etc
-        );
-    };
-}
-
-#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
-
-#endif // AI_FBXEXPORTER_H_INC
diff --git a/libs/assimp/code/AssetLib/FBX/FBXImportSettings.h b/libs/assimp/code/AssetLib/FBX/FBXImportSettings.h
deleted file mode 100644
index 90e64bf..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXImportSettings.h
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXImportSettings.h
- *  @brief FBX importer runtime configuration
- */
-#ifndef INCLUDED_AI_FBX_IMPORTSETTINGS_H
-#define INCLUDED_AI_FBX_IMPORTSETTINGS_H
-
-namespace Assimp {
-namespace FBX {
-
-/** FBX import settings, parts of which are publicly accessible via their corresponding AI_CONFIG constants */
-struct ImportSettings {
-    ImportSettings() :
-            strictMode(true),
-            readAllLayers(true),
-            readAllMaterials(false),
-            readMaterials(true),
-            readTextures(true),
-            readCameras(true),
-            readLights(true),
-            readAnimations(true),
-            readWeights(true),
-            preservePivots(true),
-            optimizeEmptyAnimationCurves(true),
-            useLegacyEmbeddedTextureNaming(false),
-            removeEmptyBones(true),
-            convertToMeters(false) {
-        // empty
-    }
-
-    /** enable strict mode:
-     *   - only accept fbx 2012, 2013 files
-     *   - on the slightest error, give up.
-     *
-     *  Basically, strict mode means that the fbx file will actually
-     *  be validated. Strict mode is off by default. */
-    bool strictMode;
-
-    /** specifies whether all geometry layers are read and scanned for
-      * usable data channels. The FBX spec indicates that many readers
-      * will only read the first channel and that this is in some way
-      * the recommended way- in reality, however, it happens a lot that
-      * vertex data is spread among multiple layers. The default
-      * value for this option is true.*/
-    bool readAllLayers;
-
-    /** specifies whether all materials are read, or only those that
-     *  are referenced by at least one mesh. Reading all materials
-     *  may make FBX reading a lot slower since all objects
-     *  need to be processed .
-     *  This bit is ignored unless readMaterials=true*/
-    bool readAllMaterials;
-
-    /** import materials (true) or skip them and assign a default
-     *  material. The default value is true.*/
-    bool readMaterials;
-
-    /** import embedded textures? Default value is true.*/
-    bool readTextures;
-
-    /** import cameras? Default value is true.*/
-    bool readCameras;
-
-    /** import light sources? Default value is true.*/
-    bool readLights;
-
-    /** import animations (i.e. animation curves, the node
-     *  skeleton is always imported). Default value is true. */
-    bool readAnimations;
-
-    /** read bones (vertex weights and deform info).
-     *  Default value is true. */
-    bool readWeights;
-
-    /** preserve transformation pivots and offsets. Since these can
-     *  not directly be represented in assimp, additional dummy
-     *  nodes will be generated. Note that settings this to false
-     *  can make animation import a lot slower. The default value
-     *  is true.
-     *
-     *  The naming scheme for the generated nodes is:
-     *    <OriginalName>_$AssimpFbx$_<TransformName>
-     *
-     *  where <TransformName> is one of
-     *    RotationPivot
-     *    RotationOffset
-     *    PreRotation
-     *    PostRotation
-     *    ScalingPivot
-     *    ScalingOffset
-     *    Translation
-     *    Scaling
-     *    Rotation
-     **/
-    bool preservePivots;
-
-    /** do not import animation curves that specify a constant
-     *  values matching the corresponding node transformation.
-     *  The default value is true. */
-    bool optimizeEmptyAnimationCurves;
-
-    /** use legacy naming for embedded textures eg: (*0, *1, *2)
-    */
-    bool useLegacyEmbeddedTextureNaming;
-
-    /** Empty bones shall be removed
-    */
-    bool removeEmptyBones;
-
-    /** Set to true to perform a conversion from cm to meter after the import
-    */
-    bool convertToMeters;
-};
-
-} // namespace FBX
-} // namespace Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXImporter.cpp b/libs/assimp/code/AssetLib/FBX/FBXImporter.cpp
deleted file mode 100644
index 0f63acc..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXImporter.cpp
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-r
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXImporter.cpp
- *  @brief Implementation of the FBX importer.
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXImporter.h"
-
-#include "FBXConverter.h"
-#include "FBXDocument.h"
-#include "FBXParser.h"
-#include "FBXTokenizer.h"
-#include "FBXUtil.h"
-
-#include <assimp/MemoryIOWrapper.h>
-#include <assimp/StreamReader.h>
-#include <assimp/importerdesc.h>
-#include <assimp/Importer.hpp>
-
-namespace Assimp {
-
-template <>
-const char *LogFunctions<FBXImporter>::Prefix() {
-	static auto prefix = "FBX: ";
-	return prefix;
-}
-
-} // namespace Assimp
-
-using namespace Assimp;
-using namespace Assimp::Formatter;
-using namespace Assimp::FBX;
-
-namespace {
-
-static const aiImporterDesc desc = {
-	"Autodesk FBX Importer",
-	"",
-	"",
-	"",
-	aiImporterFlags_SupportTextFlavour,
-	0,
-	0,
-	0,
-	0,
-	"fbx"
-};
-}
-
-// ------------------------------------------------------------------------------------------------
-// Constructor to be privately used by #Importer
-FBXImporter::FBXImporter() {
-}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-FBXImporter::~FBXImporter() {
-}
-
-// ------------------------------------------------------------------------------------------------
-// Returns whether the class can handle the format of the given file.
-bool FBXImporter::CanRead(const std::string & pFile, IOSystem * pIOHandler, bool /*checkSig*/) const {
-	// at least ASCII-FBX files usually have a 'FBX' somewhere in their head
-	static const char *tokens[] = { "fbx" };
-	return SearchFileHeaderForToken(pIOHandler, pFile, tokens, AI_COUNT_OF(tokens));
-}
-
-// ------------------------------------------------------------------------------------------------
-// List all extensions handled by this loader
-const aiImporterDesc *FBXImporter::GetInfo() const {
-	return &desc;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Setup configuration properties for the loader
-void FBXImporter::SetupProperties(const Importer *pImp) {
-	settings.readAllLayers = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_ALL_GEOMETRY_LAYERS, true);
-	settings.readAllMaterials = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_ALL_MATERIALS, false);
-	settings.readMaterials = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_MATERIALS, true);
-	settings.readTextures = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_TEXTURES, true);
-	settings.readCameras = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_CAMERAS, true);
-	settings.readLights = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_LIGHTS, true);
-	settings.readAnimations = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_ANIMATIONS, true);
-	settings.readWeights = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_READ_WEIGHTS, true);
-	settings.strictMode = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_STRICT_MODE, false);
-	settings.preservePivots = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_PRESERVE_PIVOTS, true);
-	settings.optimizeEmptyAnimationCurves = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_OPTIMIZE_EMPTY_ANIMATION_CURVES, true);
-	settings.useLegacyEmbeddedTextureNaming = pImp->GetPropertyBool(AI_CONFIG_IMPORT_FBX_EMBEDDED_TEXTURES_LEGACY_NAMING, false);
-	settings.removeEmptyBones = pImp->GetPropertyBool(AI_CONFIG_IMPORT_REMOVE_EMPTY_BONES, true);
-	settings.convertToMeters = pImp->GetPropertyBool(AI_CONFIG_FBX_CONVERT_TO_M, false);
-}
-
-// ------------------------------------------------------------------------------------------------
-// Imports the given file into the given scene structure.
-void FBXImporter::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
-	auto streamCloser = [&](IOStream *pStream) {
-		pIOHandler->Close(pStream);
-	};
-	std::unique_ptr<IOStream, decltype(streamCloser)> stream(pIOHandler->Open(pFile, "rb"), streamCloser);
-	if (!stream) {
-		ThrowException("Could not open file for reading");
-	}
-
-    ASSIMP_LOG_DEBUG("Reading FBX file");
-
-	// read entire file into memory - no streaming for this, fbx
-	// files can grow large, but the assimp output data structure
-	// then becomes very large, too. Assimp doesn't support
-	// streaming for its output data structures so the net win with
-	// streaming input data would be very low.
-	std::vector<char> contents;
-	contents.resize(stream->FileSize() + 1);
-	stream->Read(&*contents.begin(), 1, contents.size() - 1);
-	contents[contents.size() - 1] = 0;
-	const char *const begin = &*contents.begin();
-
-	// broadphase tokenizing pass in which we identify the core
-	// syntax elements of FBX (brackets, commas, key:value mappings)
-	TokenList tokens;
-	try {
-
-		bool is_binary = false;
-		if (!strncmp(begin, "Kaydara FBX Binary", 18)) {
-			is_binary = true;
-			TokenizeBinary(tokens, begin, contents.size());
-		} else {
-			Tokenize(tokens, begin);
-		}
-
-		// use this information to construct a very rudimentary
-		// parse-tree representing the FBX scope structure
-		Parser parser(tokens, is_binary);
-
-		// take the raw parse-tree and convert it to a FBX DOM
-		Document doc(parser, settings);
-
-		// convert the FBX DOM to aiScene
-		ConvertToAssimpScene(pScene, doc, settings.removeEmptyBones);
-
-		// size relative to cm
-		float size_relative_to_cm = doc.GlobalSettings().UnitScaleFactor();
-        if (size_relative_to_cm == 0.0)
-        {
-			// BaseImporter later asserts that fileScale is non-zero.
-			ThrowException("The UnitScaleFactor must be non-zero");
-        }
-
-		// Set FBX file scale is relative to CM must be converted to M for
-		// assimp universal format (M)
-		SetFileScale(size_relative_to_cm * 0.01f);
-
-		std::for_each(tokens.begin(), tokens.end(), Util::delete_fun<Token>());
-	} catch (std::exception &) {
-		std::for_each(tokens.begin(), tokens.end(), Util::delete_fun<Token>());
-		throw;
-	}
-}
-
-#endif // !ASSIMP_BUILD_NO_FBX_IMPORTER
diff --git a/libs/assimp/code/AssetLib/FBX/FBXImporter.h b/libs/assimp/code/AssetLib/FBX/FBXImporter.h
deleted file mode 100644
index a212efe..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXImporter.h
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXImporter.h
- *  @brief Declaration of the FBX main importer class
- */
-#ifndef INCLUDED_AI_FBX_IMPORTER_H
-#define INCLUDED_AI_FBX_IMPORTER_H
-
-#include <assimp/BaseImporter.h>
-#include <assimp/LogAux.h>
-
-#include "FBXImportSettings.h"
-
-namespace Assimp {
-
-// TinyFormatter.h
-namespace Formatter {
-
-template <typename T, typename TR, typename A>
-class basic_formatter;
-
-typedef class basic_formatter<char, std::char_traits<char>, std::allocator<char>> format;
-
-} // namespace Formatter
-
-// -------------------------------------------------------------------------------------------
-/// Loads the Autodesk FBX file format.
-///
-/// See http://en.wikipedia.org/wiki/FBX
-// -------------------------------------------------------------------------------------------
-class FBXImporter : public BaseImporter, public LogFunctions<FBXImporter> {
-public:
-    FBXImporter();
-    ~FBXImporter() override;
-
-    // --------------------
-    bool CanRead(const std::string &pFile,
-            IOSystem *pIOHandler,
-            bool checkSig) const override;
-
-protected:
-    // --------------------
-    const aiImporterDesc *GetInfo() const override;
-
-    // --------------------
-    void SetupProperties(const Importer *pImp) override;
-
-    // --------------------
-    void InternReadFile(const std::string &pFile,
-            aiScene *pScene,
-            IOSystem *pIOHandler) override;
-
-private:
-    FBX::ImportSettings settings;
-}; // !class FBXImporter
-
-} // end of namespace Assimp
-
-#endif // !INCLUDED_AI_FBX_IMPORTER_H
diff --git a/libs/assimp/code/AssetLib/FBX/FBXMaterial.cpp b/libs/assimp/code/AssetLib/FBX/FBXMaterial.cpp
deleted file mode 100644
index 8849179..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXMaterial.cpp
+++ /dev/null
@@ -1,376 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXMaterial.cpp
- *  @brief Assimp::FBX::Material and Assimp::FBX::Texture implementation
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXParser.h"
-#include "FBXDocument.h"
-#include "FBXImporter.h"
-#include "FBXImportSettings.h"
-#include "FBXDocumentUtil.h"
-#include "FBXProperties.h"
-#include <assimp/ByteSwapper.h>
-#include <assimp/ParsingUtils.h>
-
-#include "FBXUtil.h"
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-Material::Material(uint64_t id, const Element& element, const Document& doc, const std::string& name) :
-        Object(id,element,name) {
-    const Scope& sc = GetRequiredScope(element);
-
-    const Element* const ShadingModel = sc["ShadingModel"];
-    const Element* const MultiLayer = sc["MultiLayer"];
-
-    if(MultiLayer) {
-        multilayer = !!ParseTokenAsInt(GetRequiredToken(*MultiLayer,0));
-    }
-
-    if(ShadingModel) {
-        shading = ParseTokenAsString(GetRequiredToken(*ShadingModel,0));
-    } else {
-        DOMWarning("shading mode not specified, assuming phong",&element);
-        shading = "phong";
-    }
-
-    // lower-case shading because Blender (for example) writes "Phong"
-    for (size_t i = 0; i < shading.length(); ++i) {
-        shading[i] = static_cast<char>(tolower(static_cast<unsigned char>(shading[i])));
-    }
-    std::string templateName;
-    if(shading == "phong") {
-        templateName = "Material.FbxSurfacePhong";
-    } else if(shading == "lambert") {
-        templateName = "Material.FbxSurfaceLambert";
-    } else {
-        DOMWarning("shading mode not recognized: " + shading,&element);
-    }
-
-    props = GetPropertyTable(doc,templateName,element,sc);
-
-    // resolve texture links
-    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID());
-    for(const Connection* con : conns) {
-        // texture link to properties, not objects
-        if ( 0 == con->PropertyName().length()) {
-            continue;
-        }
-
-        const Object* const ob = con->SourceObject();
-        if(nullptr == ob) {
-            DOMWarning("failed to read source object for texture link, ignoring",&element);
-            continue;
-        }
-
-        const Texture* const tex = dynamic_cast<const Texture*>(ob);
-        if(nullptr == tex) {
-            const LayeredTexture* const layeredTexture = dynamic_cast<const LayeredTexture*>(ob);
-            if(!layeredTexture) {
-                DOMWarning("source object for texture link is not a texture or layered texture, ignoring",&element);
-                continue;
-            }
-            const std::string& prop = con->PropertyName();
-            if (layeredTextures.find(prop) != layeredTextures.end()) {
-                DOMWarning("duplicate layered texture link: " + prop,&element);
-            }
-
-            layeredTextures[prop] = layeredTexture;
-            ((LayeredTexture*)layeredTexture)->fillTexture(doc);
-        } else {
-            const std::string& prop = con->PropertyName();
-            if (textures.find(prop) != textures.end()) {
-                DOMWarning("duplicate texture link: " + prop,&element);
-            }
-
-            textures[prop] = tex;
-        }
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Material::~Material() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-Texture::Texture(uint64_t id, const Element& element, const Document& doc, const std::string& name) :
-        Object(id,element,name),
-        uvScaling(1.0f,1.0f),
-        media(0) {
-    const Scope& sc = GetRequiredScope(element);
-
-    const Element* const Type = sc["Type"];
-    const Element* const FileName = sc["FileName"];
-    const Element* const RelativeFilename = sc["RelativeFilename"];
-    const Element* const ModelUVTranslation = sc["ModelUVTranslation"];
-    const Element* const ModelUVScaling = sc["ModelUVScaling"];
-    const Element* const Texture_Alpha_Source = sc["Texture_Alpha_Source"];
-    const Element* const Cropping = sc["Cropping"];
-
-    if(Type) {
-        type = ParseTokenAsString(GetRequiredToken(*Type,0));
-    }
-
-    if(FileName) {
-        fileName = ParseTokenAsString(GetRequiredToken(*FileName,0));
-    }
-
-    if(RelativeFilename) {
-        relativeFileName = ParseTokenAsString(GetRequiredToken(*RelativeFilename,0));
-    }
-
-    if(ModelUVTranslation) {
-        uvTrans = aiVector2D(ParseTokenAsFloat(GetRequiredToken(*ModelUVTranslation,0)),
-            ParseTokenAsFloat(GetRequiredToken(*ModelUVTranslation,1))
-        );
-    }
-
-    if(ModelUVScaling) {
-        uvScaling = aiVector2D(ParseTokenAsFloat(GetRequiredToken(*ModelUVScaling,0)),
-            ParseTokenAsFloat(GetRequiredToken(*ModelUVScaling,1))
-        );
-    }
-
-    if(Cropping) {
-        crop[0] = ParseTokenAsInt(GetRequiredToken(*Cropping,0));
-        crop[1] = ParseTokenAsInt(GetRequiredToken(*Cropping,1));
-        crop[2] = ParseTokenAsInt(GetRequiredToken(*Cropping,2));
-        crop[3] = ParseTokenAsInt(GetRequiredToken(*Cropping,3));
-    } else {
-        // vc8 doesn't support the crop() syntax in initialization lists
-        // (and vc9 WARNS about the new (i.e. compliant) behaviour).
-        crop[0] = crop[1] = crop[2] = crop[3] = 0;
-    }
-
-    if(Texture_Alpha_Source) {
-        alphaSource = ParseTokenAsString(GetRequiredToken(*Texture_Alpha_Source,0));
-    }
-
-    props = GetPropertyTable(doc,"Texture.FbxFileTexture",element,sc);
-
-    // 3DS Max and FBX SDK use "Scaling" and "Translation" instead of "ModelUVScaling" and "ModelUVTranslation". Use these properties if available.
-    bool ok;
-    const aiVector3D& scaling = PropertyGet<aiVector3D>(*props, "Scaling", ok);
-    if (ok) {
-        uvScaling.x = scaling.x;
-        uvScaling.y = scaling.y;
-    }
-
-    const aiVector3D& trans = PropertyGet<aiVector3D>(*props, "Translation", ok);
-    if (ok) {
-        uvTrans.x = trans.x;
-        uvTrans.y = trans.y;
-    }
-
-    const aiVector3D &rotation = PropertyGet<aiVector3D>(*props, "Rotation", ok);
-    if (ok) {
-        uvRotation = rotation.z;
-    }
-
-    // resolve video links
-    if(doc.Settings().readTextures) {
-        const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID());
-        for(const Connection* con : conns) {
-            const Object* const ob = con->SourceObject();
-            if (nullptr == ob) {
-                DOMWarning("failed to read source object for texture link, ignoring",&element);
-                continue;
-            }
-
-            const Video* const video = dynamic_cast<const Video*>(ob);
-            if(video) {
-                media = video;
-            }
-        }
-    }
-}
-
-
-Texture::~Texture() {
-    // empty
-}
-
-LayeredTexture::LayeredTexture(uint64_t id, const Element& element, const Document& /*doc*/, const std::string& name) :
-        Object(id,element,name),
-        blendMode(BlendMode_Modulate),
-        alpha(1) {
-    const Scope& sc = GetRequiredScope(element);
-
-    const Element* const BlendModes = sc["BlendModes"];
-    const Element* const Alphas = sc["Alphas"];
-
-    if (nullptr != BlendModes) {
-        blendMode = (BlendMode)ParseTokenAsInt(GetRequiredToken(*BlendModes,0));
-    }
-    if (nullptr != Alphas) {
-        alpha = ParseTokenAsFloat(GetRequiredToken(*Alphas,0));
-    }
-}
-
-LayeredTexture::~LayeredTexture() {
-    // empty
-}
-
-void LayeredTexture::fillTexture(const Document& doc) {
-    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID());
-    for(size_t i = 0; i < conns.size();++i) {
-        const Connection* con = conns.at(i);
-
-        const Object* const ob = con->SourceObject();
-        if (nullptr == ob) {
-            DOMWarning("failed to read source object for texture link, ignoring",&element);
-            continue;
-        }
-
-        const Texture* const tex = dynamic_cast<const Texture*>(ob);
-
-        textures.push_back(tex);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-Video::Video(uint64_t id, const Element& element, const Document& doc, const std::string& name) :
-        Object(id,element,name),
-        contentLength(0),
-        content(0) {
-    const Scope& sc = GetRequiredScope(element);
-
-    const Element* const Type = sc["Type"];
-    const Element* const FileName = sc.FindElementCaseInsensitive("FileName");  //some files retain the information as "Filename", others "FileName", who knows
-    const Element* const RelativeFilename = sc["RelativeFilename"];
-    const Element* const Content = sc["Content"];
-
-    if(Type) {
-        type = ParseTokenAsString(GetRequiredToken(*Type,0));
-    }
-
-    if(FileName) {
-        fileName = ParseTokenAsString(GetRequiredToken(*FileName,0));
-    }
-
-    if(RelativeFilename) {
-        relativeFileName = ParseTokenAsString(GetRequiredToken(*RelativeFilename,0));
-    }
-
-    if(Content && !Content->Tokens().empty()) {
-        //this field is omitted when the embedded texture is already loaded, let's ignore if it's not found
-        try {
-            const Token& token = GetRequiredToken(*Content, 0);
-            const char* data = token.begin();
-            if (!token.IsBinary()) {
-                if (*data != '"') {
-                    DOMError("embedded content is not surrounded by quotation marks", &element);
-                } else {
-                    size_t targetLength = 0;
-                    auto numTokens = Content->Tokens().size();
-                    // First time compute size (it could be large like 64Gb and it is good to allocate it once)
-                    for (uint32_t tokenIdx = 0; tokenIdx < numTokens; ++tokenIdx) {
-                        const Token& dataToken = GetRequiredToken(*Content, tokenIdx);
-                        size_t tokenLength = dataToken.end() - dataToken.begin() - 2; // ignore double quotes
-                        const char* base64data = dataToken.begin() + 1;
-                        const size_t outLength = Util::ComputeDecodedSizeBase64(base64data, tokenLength);
-                        if (outLength == 0) {
-                            DOMError("Corrupted embedded content found", &element);
-                        }
-                        targetLength += outLength;
-                    }
-                    if (targetLength == 0) {
-                        DOMError("Corrupted embedded content found", &element);
-                    }
-                    content = new uint8_t[targetLength];
-                    contentLength = static_cast<uint64_t>(targetLength);
-                    size_t dst_offset = 0;
-                    for (uint32_t tokenIdx = 0; tokenIdx < numTokens; ++tokenIdx) {
-                        const Token& dataToken = GetRequiredToken(*Content, tokenIdx);
-                        size_t tokenLength = dataToken.end() - dataToken.begin() - 2; // ignore double quotes
-                        const char* base64data = dataToken.begin() + 1;
-                        dst_offset += Util::DecodeBase64(base64data, tokenLength, content + dst_offset, targetLength - dst_offset);
-                    }
-                    if (targetLength != dst_offset) {
-                        delete[] content;
-                        contentLength = 0;
-                        DOMError("Corrupted embedded content found", &element);
-                    }
-                }
-            } else if (static_cast<size_t>(token.end() - data) < 5) {
-                DOMError("binary data array is too short, need five (5) bytes for type signature and element count", &element);
-            } else if (*data != 'R') {
-                DOMWarning("video content is not raw binary data, ignoring", &element);
-            } else {
-                // read number of elements
-                uint32_t len = 0;
-                ::memcpy(&len, data + 1, sizeof(len));
-                AI_SWAP4(len);
-
-                contentLength = len;
-
-                content = new uint8_t[len];
-                ::memcpy(content, data + 5, len);
-            }
-        } catch (const runtime_error& runtimeError) {
-            //we don't need the content data for contents that has already been loaded
-            ASSIMP_LOG_VERBOSE_DEBUG("Caught exception in FBXMaterial (likely because content was already loaded): ",
-                    runtimeError.what());
-        }
-    }
-
-    props = GetPropertyTable(doc,"Video.FbxVideo",element,sc);
-}
-
-
-Video::~Video() {
-    delete[] content;
-}
-
-} //!FBX
-} //!Assimp
-
-#endif // ASSIMP_BUILD_NO_FBX_IMPORTER
diff --git a/libs/assimp/code/AssetLib/FBX/FBXMeshGeometry.cpp b/libs/assimp/code/AssetLib/FBX/FBXMeshGeometry.cpp
deleted file mode 100644
index 1f92fa1..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXMeshGeometry.cpp
+++ /dev/null
@@ -1,728 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXMeshGeometry.cpp
- *  @brief Assimp::FBX::MeshGeometry implementation
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include <functional>
-
-#include "FBXMeshGeometry.h"
-#include "FBXDocument.h"
-#include "FBXImporter.h"
-#include "FBXImportSettings.h"
-#include "FBXDocumentUtil.h"
-
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-Geometry::Geometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
-    : Object(id, element, name)
-    , skin()
-{
-    const std::vector<const Connection*>& conns = doc.GetConnectionsByDestinationSequenced(ID(),"Deformer");
-    for(const Connection* con : conns) {
-        const Skin* const sk = ProcessSimpleConnection<Skin>(*con, false, "Skin -> Geometry", element);
-        if(sk) {
-            skin = sk;
-        }
-        const BlendShape* const bsp = ProcessSimpleConnection<BlendShape>(*con, false, "BlendShape -> Geometry", element);
-        if (bsp) {
-            blendShapes.push_back(bsp);
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-Geometry::~Geometry()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<const BlendShape*>& Geometry::GetBlendShapes() const {
-    return blendShapes;
-}
-
-// ------------------------------------------------------------------------------------------------
-const Skin* Geometry::DeformerSkin() const {
-    return skin;
-}
-
-// ------------------------------------------------------------------------------------------------
-MeshGeometry::MeshGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
-: Geometry(id, element,name, doc)
-{
-    const Scope* sc = element.Compound();
-    if (!sc) {
-        DOMError("failed to read Geometry object (class: Mesh), no data scope found");
-    }
-
-    // must have Mesh elements:
-    const Element& Vertices = GetRequiredElement(*sc,"Vertices",&element);
-    const Element& PolygonVertexIndex = GetRequiredElement(*sc,"PolygonVertexIndex",&element);
-
-    // optional Mesh elements:
-    const ElementCollection& Layer = sc->GetCollection("Layer");
-
-    std::vector<aiVector3D> tempVerts;
-    ParseVectorDataArray(tempVerts,Vertices);
-
-    if(tempVerts.empty()) {
-        FBXImporter::LogWarn("encountered mesh with no vertices");
-    }
-
-    std::vector<int> tempFaces;
-    ParseVectorDataArray(tempFaces,PolygonVertexIndex);
-
-    if(tempFaces.empty()) {
-        FBXImporter::LogWarn("encountered mesh with no faces");
-    }
-
-    m_vertices.reserve(tempFaces.size());
-    m_faces.reserve(tempFaces.size() / 3);
-
-    m_mapping_offsets.resize(tempVerts.size());
-    m_mapping_counts.resize(tempVerts.size(),0);
-    m_mappings.resize(tempFaces.size());
-
-    const size_t vertex_count = tempVerts.size();
-
-    // generate output vertices, computing an adjacency table to
-    // preserve the mapping from fbx indices to *this* indexing.
-    unsigned int count = 0;
-    for(int index : tempFaces) {
-        const int absi = index < 0 ? (-index - 1) : index;
-        if(static_cast<size_t>(absi) >= vertex_count) {
-            DOMError("polygon vertex index out of range",&PolygonVertexIndex);
-        }
-
-        m_vertices.push_back(tempVerts[absi]);
-        ++count;
-
-        ++m_mapping_counts[absi];
-
-        if (index < 0) {
-            m_faces.push_back(count);
-            count = 0;
-        }
-    }
-
-    unsigned int cursor = 0;
-    for (size_t i = 0, e = tempVerts.size(); i < e; ++i) {
-        m_mapping_offsets[i] = cursor;
-        cursor += m_mapping_counts[i];
-
-        m_mapping_counts[i] = 0;
-    }
-
-    cursor = 0;
-    for(int index : tempFaces) {
-        const int absi = index < 0 ? (-index - 1) : index;
-        m_mappings[m_mapping_offsets[absi] + m_mapping_counts[absi]++] = cursor++;
-    }
-
-    // if settings.readAllLayers is true:
-    //  * read all layers, try to load as many vertex channels as possible
-    // if settings.readAllLayers is false:
-    //  * read only the layer with index 0, but warn about any further layers
-    for (ElementMap::const_iterator it = Layer.first; it != Layer.second; ++it) {
-        const TokenList& tokens = (*it).second->Tokens();
-
-        const char* err;
-        const int index = ParseTokenAsInt(*tokens[0], err);
-        if(err) {
-            DOMError(err,&element);
-        }
-
-        if(doc.Settings().readAllLayers || index == 0) {
-            const Scope& layer = GetRequiredScope(*(*it).second);
-            ReadLayer(layer);
-        }
-        else {
-            FBXImporter::LogWarn("ignoring additional geometry layers");
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-MeshGeometry::~MeshGeometry() {
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector3D>& MeshGeometry::GetVertices() const {
-    return m_vertices;
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector3D>& MeshGeometry::GetNormals() const {
-    return m_normals;
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector3D>& MeshGeometry::GetTangents() const {
-    return m_tangents;
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector3D>& MeshGeometry::GetBinormals() const {
-    return m_binormals;
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<unsigned int>& MeshGeometry::GetFaceIndexCounts() const {
-    return m_faces;
-}
-
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector2D>& MeshGeometry::GetTextureCoords( unsigned int index ) const {
-    static const std::vector<aiVector2D> empty;
-    return index >= AI_MAX_NUMBER_OF_TEXTURECOORDS ? empty : m_uvs[ index ];
-}
-
-std::string MeshGeometry::GetTextureCoordChannelName( unsigned int index ) const {
-    return index >= AI_MAX_NUMBER_OF_TEXTURECOORDS ? "" : m_uvNames[ index ];
-}
-
-const std::vector<aiColor4D>& MeshGeometry::GetVertexColors( unsigned int index ) const {
-    static const std::vector<aiColor4D> empty;
-    return index >= AI_MAX_NUMBER_OF_COLOR_SETS ? empty : m_colors[ index ];
-}
-
-const MatIndexArray& MeshGeometry::GetMaterialIndices() const {
-    return m_materials;
-}
-// ------------------------------------------------------------------------------------------------
-const unsigned int* MeshGeometry::ToOutputVertexIndex( unsigned int in_index, unsigned int& count ) const {
-    if ( in_index >= m_mapping_counts.size() ) {
-        return nullptr;
-    }
-
-    ai_assert( m_mapping_counts.size() == m_mapping_offsets.size() );
-    count = m_mapping_counts[ in_index ];
-
-    ai_assert( m_mapping_offsets[ in_index ] + count <= m_mappings.size() );
-
-    return &m_mappings[ m_mapping_offsets[ in_index ] ];
-}
-
-// ------------------------------------------------------------------------------------------------
-unsigned int MeshGeometry::FaceForVertexIndex( unsigned int in_index ) const {
-    ai_assert( in_index < m_vertices.size() );
-
-    // in the current conversion pattern this will only be needed if
-    // weights are present, so no need to always pre-compute this table
-    if ( m_facesVertexStartIndices.empty() ) {
-        m_facesVertexStartIndices.resize( m_faces.size() + 1, 0 );
-
-        std::partial_sum( m_faces.begin(), m_faces.end(), m_facesVertexStartIndices.begin() + 1 );
-        m_facesVertexStartIndices.pop_back();
-    }
-
-    ai_assert( m_facesVertexStartIndices.size() == m_faces.size() );
-    const std::vector<unsigned int>::iterator it = std::upper_bound(
-        m_facesVertexStartIndices.begin(),
-        m_facesVertexStartIndices.end(),
-        in_index
-        );
-
-    return static_cast< unsigned int >( std::distance( m_facesVertexStartIndices.begin(), it - 1 ) );
-}
-
-// ------------------------------------------------------------------------------------------------
-void MeshGeometry::ReadLayer(const Scope& layer)
-{
-    const ElementCollection& LayerElement = layer.GetCollection("LayerElement");
-    for (ElementMap::const_iterator eit = LayerElement.first; eit != LayerElement.second; ++eit) {
-        const Scope& elayer = GetRequiredScope(*(*eit).second);
-
-        ReadLayerElement(elayer);
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-void MeshGeometry::ReadLayerElement(const Scope& layerElement)
-{
-    const Element& Type = GetRequiredElement(layerElement,"Type");
-    const Element& TypedIndex = GetRequiredElement(layerElement,"TypedIndex");
-
-    const std::string& type = ParseTokenAsString(GetRequiredToken(Type,0));
-    const int typedIndex = ParseTokenAsInt(GetRequiredToken(TypedIndex,0));
-
-    const Scope& top = GetRequiredScope(element);
-    const ElementCollection candidates = top.GetCollection(type);
-
-    for (ElementMap::const_iterator it = candidates.first; it != candidates.second; ++it) {
-        const int index = ParseTokenAsInt(GetRequiredToken(*(*it).second,0));
-        if(index == typedIndex) {
-            ReadVertexData(type,typedIndex,GetRequiredScope(*(*it).second));
-            return;
-        }
-    }
-
-    FBXImporter::LogError("failed to resolve vertex layer element: ",
-        type, ", index: ", typedIndex);
-}
-
-// ------------------------------------------------------------------------------------------------
-void MeshGeometry::ReadVertexData(const std::string& type, int index, const Scope& source)
-{
-    const std::string& MappingInformationType = ParseTokenAsString(GetRequiredToken(
-        GetRequiredElement(source,"MappingInformationType"),0)
-    );
-
-    const std::string& ReferenceInformationType = ParseTokenAsString(GetRequiredToken(
-        GetRequiredElement(source,"ReferenceInformationType"),0)
-    );
-
-    if (type == "LayerElementUV") {
-        if(index >= AI_MAX_NUMBER_OF_TEXTURECOORDS) {
-            FBXImporter::LogError("ignoring UV layer, maximum number of UV channels exceeded: ",
-                index, " (limit is ", AI_MAX_NUMBER_OF_TEXTURECOORDS, ")" );
-            return;
-        }
-
-        const Element* Name = source["Name"];
-        m_uvNames[index] = std::string();
-        if(Name) {
-            m_uvNames[index] = ParseTokenAsString(GetRequiredToken(*Name,0));
-        }
-
-        ReadVertexDataUV(m_uvs[index],source,
-            MappingInformationType,
-            ReferenceInformationType
-        );
-    }
-    else if (type == "LayerElementMaterial") {
-        if (m_materials.size() > 0) {
-            FBXImporter::LogError("ignoring additional material layer");
-            return;
-        }
-
-        std::vector<int> temp_materials;
-
-        ReadVertexDataMaterials(temp_materials,source,
-            MappingInformationType,
-            ReferenceInformationType
-        );
-
-        // sometimes, there will be only negative entries. Drop the material
-        // layer in such a case (I guess it means a default material should
-        // be used). This is what the converter would do anyway, and it
-        // avoids losing the material if there are more material layers
-        // coming of which at least one contains actual data (did observe
-        // that with one test file).
-        const size_t count_neg = std::count_if(temp_materials.begin(),temp_materials.end(),[](int n) { return n < 0; });
-        if(count_neg == temp_materials.size()) {
-            FBXImporter::LogWarn("ignoring dummy material layer (all entries -1)");
-            return;
-        }
-
-        std::swap(temp_materials, m_materials);
-    }
-    else if (type == "LayerElementNormal") {
-        if (m_normals.size() > 0) {
-            FBXImporter::LogError("ignoring additional normal layer");
-            return;
-        }
-
-        ReadVertexDataNormals(m_normals,source,
-            MappingInformationType,
-            ReferenceInformationType
-        );
-    }
-    else if (type == "LayerElementTangent") {
-        if (m_tangents.size() > 0) {
-            FBXImporter::LogError("ignoring additional tangent layer");
-            return;
-        }
-
-        ReadVertexDataTangents(m_tangents,source,
-            MappingInformationType,
-            ReferenceInformationType
-        );
-    }
-    else if (type == "LayerElementBinormal") {
-        if (m_binormals.size() > 0) {
-            FBXImporter::LogError("ignoring additional binormal layer");
-            return;
-        }
-
-        ReadVertexDataBinormals(m_binormals,source,
-            MappingInformationType,
-            ReferenceInformationType
-        );
-    }
-    else if (type == "LayerElementColor") {
-        if(index >= AI_MAX_NUMBER_OF_COLOR_SETS) {
-            FBXImporter::LogError("ignoring vertex color layer, maximum number of color sets exceeded: ",
-                index, " (limit is ", AI_MAX_NUMBER_OF_COLOR_SETS, ")" );
-            return;
-        }
-
-        ReadVertexDataColors(m_colors[index],source,
-            MappingInformationType,
-            ReferenceInformationType
-        );
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// Lengthy utility function to read and resolve a FBX vertex data array - that is, the
-// output is in polygon vertex order. This logic is used for reading normals, UVs, colors,
-// tangents ..
-template <typename T>
-void ResolveVertexDataArray(std::vector<T>& data_out, const Scope& source,
-    const std::string& MappingInformationType,
-    const std::string& ReferenceInformationType,
-    const char* dataElementName,
-    const char* indexDataElementName,
-    size_t vertex_count,
-    const std::vector<unsigned int>& mapping_counts,
-    const std::vector<unsigned int>& mapping_offsets,
-    const std::vector<unsigned int>& mappings)
-{
-    bool isDirect = ReferenceInformationType == "Direct";
-    bool isIndexToDirect = ReferenceInformationType == "IndexToDirect";
-
-    // fall-back to direct data if there is no index data element
-    if ( isIndexToDirect && !HasElement( source, indexDataElementName ) ) {
-        isDirect = true;
-        isIndexToDirect = false;
-    }
-
-    // handle permutations of Mapping and Reference type - it would be nice to
-    // deal with this more elegantly and with less redundancy, but right
-    // now it seems unavoidable.
-    if (MappingInformationType == "ByVertice" && isDirect) {
-        if (!HasElement(source, dataElementName)) {
-            return;
-        }
-        std::vector<T> tempData;
-        ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
-
-        if (tempData.size() != mapping_offsets.size()) {
-            FBXImporter::LogError("length of input data unexpected for ByVertice mapping: ",
-                                  tempData.size(), ", expected ", mapping_offsets.size());
-            return;
-        }
-
-        data_out.resize(vertex_count);
-        for (size_t i = 0, e = tempData.size(); i < e; ++i) {
-            const unsigned int istart = mapping_offsets[i], iend = istart + mapping_counts[i];
-            for (unsigned int j = istart; j < iend; ++j) {
-                data_out[mappings[j]] = tempData[i];
-            }
-        }
-    }
-    else if (MappingInformationType == "ByVertice" && isIndexToDirect) {
-		std::vector<T> tempData;
-		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
-
-        std::vector<int> uvIndices;
-        ParseVectorDataArray(uvIndices,GetRequiredElement(source,indexDataElementName));
-
-        if (uvIndices.size() != vertex_count) {
-            FBXImporter::LogError("length of input data unexpected for ByVertice mapping: ",
-                                  uvIndices.size(), ", expected ", vertex_count);
-            return;
-        }
-
-        data_out.resize(vertex_count);
-
-        for (size_t i = 0, e = uvIndices.size(); i < e; ++i) {
-
-            const unsigned int istart = mapping_offsets[i], iend = istart + mapping_counts[i];
-            for (unsigned int j = istart; j < iend; ++j) {
-				if (static_cast<size_t>(uvIndices[i]) >= tempData.size()) {
-                    DOMError("index out of range",&GetRequiredElement(source,indexDataElementName));
-                }
-				data_out[mappings[j]] = tempData[uvIndices[i]];
-            }
-        }
-    }
-    else if (MappingInformationType == "ByPolygonVertex" && isDirect) {
-		std::vector<T> tempData;
-		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
-
-		if (tempData.size() != vertex_count) {
-            FBXImporter::LogError("length of input data unexpected for ByPolygon mapping: ",
-				tempData.size(), ", expected ", vertex_count
-            );
-            return;
-        }
-
-		data_out.swap(tempData);
-    }
-    else if (MappingInformationType == "ByPolygonVertex" && isIndexToDirect) {
-		std::vector<T> tempData;
-		ParseVectorDataArray(tempData, GetRequiredElement(source, dataElementName));
-
-        std::vector<int> uvIndices;
-        ParseVectorDataArray(uvIndices,GetRequiredElement(source,indexDataElementName));
-
-        if (uvIndices.size() > vertex_count) {
-            FBXImporter::LogWarn("trimming length of input array for ByPolygonVertex mapping: ",
-                                          uvIndices.size(), ", expected ", vertex_count);
-            uvIndices.resize(vertex_count);
-        }
-
-        if (uvIndices.size() != vertex_count) {
-            FBXImporter::LogError("length of input data unexpected for ByPolygonVertex mapping: ",
-                                  uvIndices.size(), ", expected ", vertex_count);
-            return;
-        }
-
-        data_out.resize(vertex_count);
-
-        const T empty;
-        unsigned int next = 0;
-        for(int i : uvIndices) {
-            if ( -1 == i ) {
-                data_out[ next++ ] = empty;
-                continue;
-            }
-            if (static_cast<size_t>(i) >= tempData.size()) {
-                DOMError("index out of range",&GetRequiredElement(source,indexDataElementName));
-            }
-
-			data_out[next++] = tempData[i];
-        }
-    }
-    else {
-        FBXImporter::LogError("ignoring vertex data channel, access type not implemented: ",
-            MappingInformationType, ",", ReferenceInformationType);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-void MeshGeometry::ReadVertexDataNormals(std::vector<aiVector3D>& normals_out, const Scope& source,
-    const std::string& MappingInformationType,
-    const std::string& ReferenceInformationType)
-{
-    ResolveVertexDataArray(normals_out,source,MappingInformationType,ReferenceInformationType,
-        "Normals",
-        "NormalsIndex",
-        m_vertices.size(),
-        m_mapping_counts,
-        m_mapping_offsets,
-        m_mappings);
-}
-
-// ------------------------------------------------------------------------------------------------
-void MeshGeometry::ReadVertexDataUV(std::vector<aiVector2D>& uv_out, const Scope& source,
-    const std::string& MappingInformationType,
-    const std::string& ReferenceInformationType)
-{
-    ResolveVertexDataArray(uv_out,source,MappingInformationType,ReferenceInformationType,
-        "UV",
-        "UVIndex",
-        m_vertices.size(),
-        m_mapping_counts,
-        m_mapping_offsets,
-        m_mappings);
-}
-
-// ------------------------------------------------------------------------------------------------
-void MeshGeometry::ReadVertexDataColors(std::vector<aiColor4D>& colors_out, const Scope& source,
-    const std::string& MappingInformationType,
-    const std::string& ReferenceInformationType)
-{
-    ResolveVertexDataArray(colors_out,source,MappingInformationType,ReferenceInformationType,
-        "Colors",
-        "ColorIndex",
-        m_vertices.size(),
-        m_mapping_counts,
-        m_mapping_offsets,
-        m_mappings);
-}
-
-// ------------------------------------------------------------------------------------------------
-static const char *TangentIndexToken = "TangentIndex";
-static const char *TangentsIndexToken = "TangentsIndex";
-
-void MeshGeometry::ReadVertexDataTangents(std::vector<aiVector3D>& tangents_out, const Scope& source,
-    const std::string& MappingInformationType,
-    const std::string& ReferenceInformationType)
-{
-    const char * str = source.Elements().count( "Tangents" ) > 0 ? "Tangents" : "Tangent";
-    const char * strIdx = source.Elements().count( "Tangents" ) > 0 ? TangentsIndexToken : TangentIndexToken;
-    ResolveVertexDataArray(tangents_out,source,MappingInformationType,ReferenceInformationType,
-        str,
-        strIdx,
-        m_vertices.size(),
-        m_mapping_counts,
-        m_mapping_offsets,
-        m_mappings);
-}
-
-// ------------------------------------------------------------------------------------------------
-static const char * BinormalIndexToken = "BinormalIndex";
-static const char * BinormalsIndexToken = "BinormalsIndex";
-
-void MeshGeometry::ReadVertexDataBinormals(std::vector<aiVector3D>& binormals_out, const Scope& source,
-    const std::string& MappingInformationType,
-    const std::string& ReferenceInformationType)
-{
-    const char * str = source.Elements().count( "Binormals" ) > 0 ? "Binormals" : "Binormal";
-    const char * strIdx = source.Elements().count( "Binormals" ) > 0 ? BinormalsIndexToken : BinormalIndexToken;
-    ResolveVertexDataArray(binormals_out,source,MappingInformationType,ReferenceInformationType,
-        str,
-        strIdx,
-        m_vertices.size(),
-        m_mapping_counts,
-        m_mapping_offsets,
-        m_mappings);
-}
-
-
-// ------------------------------------------------------------------------------------------------
-void MeshGeometry::ReadVertexDataMaterials(std::vector<int>& materials_out, const Scope& source,
-    const std::string& MappingInformationType,
-    const std::string& ReferenceInformationType)
-{
-    const size_t face_count = m_faces.size();
-    if( 0 == face_count )
-    {
-        return;
-    }
-
-    // materials are handled separately. First of all, they are assigned per-face
-    // and not per polyvert. Secondly, ReferenceInformationType=IndexToDirect
-    // has a slightly different meaning for materials.
-    ParseVectorDataArray(materials_out,GetRequiredElement(source,"Materials"));
-
-    if (MappingInformationType == "AllSame") {
-        // easy - same material for all faces
-        if (materials_out.empty()) {
-            FBXImporter::LogError("expected material index, ignoring");
-            return;
-        } else if (materials_out.size() > 1) {
-            FBXImporter::LogWarn("expected only a single material index, ignoring all except the first one");
-            materials_out.clear();
-        }
-
-        materials_out.resize(m_vertices.size());
-        std::fill(materials_out.begin(), materials_out.end(), materials_out.at(0));
-    } else if (MappingInformationType == "ByPolygon" && ReferenceInformationType == "IndexToDirect") {
-        materials_out.resize(face_count);
-
-        if(materials_out.size() != face_count) {
-            FBXImporter::LogError("length of input data unexpected for ByPolygon mapping: ",
-                materials_out.size(), ", expected ", face_count
-            );
-            return;
-        }
-    } else {
-        FBXImporter::LogError("ignoring material assignments, access type not implemented: ",
-            MappingInformationType, ",", ReferenceInformationType);
-    }
-}
-// ------------------------------------------------------------------------------------------------
-ShapeGeometry::ShapeGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
-: Geometry(id, element, name, doc) {
-    const Scope *sc = element.Compound();
-    if (nullptr == sc) {
-        DOMError("failed to read Geometry object (class: Shape), no data scope found");
-    }
-    const Element& Indexes = GetRequiredElement(*sc, "Indexes", &element);
-    const Element& Normals = GetRequiredElement(*sc, "Normals", &element);
-    const Element& Vertices = GetRequiredElement(*sc, "Vertices", &element);
-    ParseVectorDataArray(m_indices, Indexes);
-    ParseVectorDataArray(m_vertices, Vertices);
-    ParseVectorDataArray(m_normals, Normals);
-}
-
-// ------------------------------------------------------------------------------------------------
-ShapeGeometry::~ShapeGeometry() {
-    // empty
-}
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector3D>& ShapeGeometry::GetVertices() const {
-    return m_vertices;
-}
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector3D>& ShapeGeometry::GetNormals() const {
-    return m_normals;
-}
-// ------------------------------------------------------------------------------------------------
-const std::vector<unsigned int>& ShapeGeometry::GetIndices() const {
-    return m_indices;
-}
-// ------------------------------------------------------------------------------------------------
-LineGeometry::LineGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc)
-    : Geometry(id, element, name, doc)
-{
-    const Scope* sc = element.Compound();
-    if (!sc) {
-        DOMError("failed to read Geometry object (class: Line), no data scope found");
-    }
-    const Element& Points = GetRequiredElement(*sc, "Points", &element);
-    const Element& PointsIndex = GetRequiredElement(*sc, "PointsIndex", &element);
-    ParseVectorDataArray(m_vertices, Points);
-    ParseVectorDataArray(m_indices, PointsIndex);
-}
-
-// ------------------------------------------------------------------------------------------------
-LineGeometry::~LineGeometry() {
-    // empty
-}
-// ------------------------------------------------------------------------------------------------
-const std::vector<aiVector3D>& LineGeometry::GetVertices() const {
-    return m_vertices;
-}
-// ------------------------------------------------------------------------------------------------
-const std::vector<int>& LineGeometry::GetIndices() const {
-    return m_indices;
-}
-} // !FBX
-} // !Assimp
-#endif
-
diff --git a/libs/assimp/code/AssetLib/FBX/FBXMeshGeometry.h b/libs/assimp/code/AssetLib/FBX/FBXMeshGeometry.h
deleted file mode 100644
index 3cca38a..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXMeshGeometry.h
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-copyright notice, this list of conditions and the
-following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the
-following disclaimer in the documentation and/or other
-materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-contributors may be used to endorse or promote products
-derived from this software without specific prior
-written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXImporter.h
-*  @brief Declaration of the FBX main importer class
-*/
-#ifndef INCLUDED_AI_FBX_MESHGEOMETRY_H
-#define INCLUDED_AI_FBX_MESHGEOMETRY_H
-
-#include "FBXParser.h"
-#include "FBXDocument.h"
-
-namespace Assimp {
-namespace FBX {
-
-/**
- *  DOM base class for all kinds of FBX geometry
- */
-class Geometry : public Object
-{
-public:
-    Geometry( uint64_t id, const Element& element, const std::string& name, const Document& doc );
-    virtual ~Geometry();
-
-    /** Get the Skin attached to this geometry or nullptr */
-    const Skin* DeformerSkin() const;
-
-    /** Get the BlendShape attached to this geometry or nullptr */
-    const std::vector<const BlendShape*>& GetBlendShapes() const;
-
-private:
-    const Skin* skin;
-    std::vector<const BlendShape*> blendShapes;
-
-};
-
-typedef std::vector<int> MatIndexArray;
-
-
-/**
- *  DOM class for FBX geometry of type "Mesh"
- */
-class MeshGeometry : public Geometry
-{
-public:
-    /** The class constructor */
-    MeshGeometry( uint64_t id, const Element& element, const std::string& name, const Document& doc );
-
-    /** The class destructor */
-    virtual ~MeshGeometry();
-
-    /** Get a list of all vertex points, non-unique*/
-    const std::vector<aiVector3D>& GetVertices() const;
-
-    /** Get a list of all vertex normals or an empty array if
-    *  no normals are specified. */
-    const std::vector<aiVector3D>& GetNormals() const;
-
-    /** Get a list of all vertex tangents or an empty array
-    *  if no tangents are specified */
-    const std::vector<aiVector3D>& GetTangents() const;
-
-    /** Get a list of all vertex bi-normals or an empty array
-    *  if no bi-normals are specified */
-    const std::vector<aiVector3D>& GetBinormals() const;
-
-    /** Return list of faces - each entry denotes a face and specifies
-    *  how many vertices it has. Vertices are taken from the
-    *  vertex data arrays in sequential order. */
-    const std::vector<unsigned int>& GetFaceIndexCounts() const;
-
-    /** Get a UV coordinate slot, returns an empty array if
-    *  the requested slot does not exist. */
-    const std::vector<aiVector2D>& GetTextureCoords( unsigned int index ) const;
-
-    /** Get a UV coordinate slot, returns an empty array if
-    *  the requested slot does not exist. */
-    std::string GetTextureCoordChannelName( unsigned int index ) const;
-
-    /** Get a vertex color coordinate slot, returns an empty array if
-    *  the requested slot does not exist. */
-    const std::vector<aiColor4D>& GetVertexColors( unsigned int index ) const;
-
-    /** Get per-face-vertex material assignments */
-    const MatIndexArray& GetMaterialIndices() const;
-
-    /** Convert from a fbx file vertex index (for example from a #Cluster weight) or nullptr
-    * if the vertex index is not valid. */
-    const unsigned int* ToOutputVertexIndex( unsigned int in_index, unsigned int& count ) const;
-
-    /** Determine the face to which a particular output vertex index belongs.
-    *  This mapping is always unique. */
-    unsigned int FaceForVertexIndex( unsigned int in_index ) const;
-private:
-    void ReadLayer( const Scope& layer );
-    void ReadLayerElement( const Scope& layerElement );
-    void ReadVertexData( const std::string& type, int index, const Scope& source );
-
-    void ReadVertexDataUV( std::vector<aiVector2D>& uv_out, const Scope& source,
-        const std::string& MappingInformationType,
-        const std::string& ReferenceInformationType );
-
-    void ReadVertexDataNormals( std::vector<aiVector3D>& normals_out, const Scope& source,
-        const std::string& MappingInformationType,
-        const std::string& ReferenceInformationType );
-
-    void ReadVertexDataColors( std::vector<aiColor4D>& colors_out, const Scope& source,
-        const std::string& MappingInformationType,
-        const std::string& ReferenceInformationType );
-
-    void ReadVertexDataTangents( std::vector<aiVector3D>& tangents_out, const Scope& source,
-        const std::string& MappingInformationType,
-        const std::string& ReferenceInformationType );
-
-    void ReadVertexDataBinormals( std::vector<aiVector3D>& binormals_out, const Scope& source,
-        const std::string& MappingInformationType,
-        const std::string& ReferenceInformationType );
-
-    void ReadVertexDataMaterials( MatIndexArray& materials_out, const Scope& source,
-        const std::string& MappingInformationType,
-        const std::string& ReferenceInformationType );
-
-private:
-    // cached data arrays
-    MatIndexArray m_materials;
-    std::vector<aiVector3D> m_vertices;
-    std::vector<unsigned int> m_faces;
-    mutable std::vector<unsigned int> m_facesVertexStartIndices;
-    std::vector<aiVector3D> m_tangents;
-    std::vector<aiVector3D> m_binormals;
-    std::vector<aiVector3D> m_normals;
-
-    std::string m_uvNames[ AI_MAX_NUMBER_OF_TEXTURECOORDS ];
-    std::vector<aiVector2D> m_uvs[ AI_MAX_NUMBER_OF_TEXTURECOORDS ];
-    std::vector<aiColor4D> m_colors[ AI_MAX_NUMBER_OF_COLOR_SETS ];
-
-    std::vector<unsigned int> m_mapping_counts;
-    std::vector<unsigned int> m_mapping_offsets;
-    std::vector<unsigned int> m_mappings;
-};
-
-/**
-*  DOM class for FBX geometry of type "Shape"
-*/
-class ShapeGeometry : public Geometry
-{
-public:
-    /** The class constructor */
-    ShapeGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc);
-
-    /** The class destructor */
-    virtual ~ShapeGeometry();
-
-    /** Get a list of all vertex points, non-unique*/
-    const std::vector<aiVector3D>& GetVertices() const;
-
-    /** Get a list of all vertex normals or an empty array if
-    *  no normals are specified. */
-    const std::vector<aiVector3D>& GetNormals() const;
-
-    /** Return list of vertex indices. */
-    const std::vector<unsigned int>& GetIndices() const;
-
-private:
-    std::vector<aiVector3D> m_vertices;
-    std::vector<aiVector3D> m_normals;
-    std::vector<unsigned int> m_indices;
-};
-/**
-*  DOM class for FBX geometry of type "Line"
-*/
-class LineGeometry : public Geometry
-{
-public:
-    /** The class constructor */
-    LineGeometry(uint64_t id, const Element& element, const std::string& name, const Document& doc);
-
-    /** The class destructor */
-    virtual ~LineGeometry();
-
-    /** Get a list of all vertex points, non-unique*/
-    const std::vector<aiVector3D>& GetVertices() const;
-
-    /** Return list of vertex indices. */
-    const std::vector<int>& GetIndices() const;
-
-private:
-    std::vector<aiVector3D> m_vertices;
-    std::vector<int> m_indices;
-};
-
-}
-}
-
-#endif // INCLUDED_AI_FBX_MESHGEOMETRY_H
-
diff --git a/libs/assimp/code/AssetLib/FBX/FBXModel.cpp b/libs/assimp/code/AssetLib/FBX/FBXModel.cpp
deleted file mode 100644
index 9fe4cd5..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXModel.cpp
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXModel.cpp
- *  @brief Assimp::FBX::Model implementation
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXDocument.h"
-#include "FBXDocumentUtil.h"
-#include "FBXImporter.h"
-#include "FBXMeshGeometry.h"
-#include "FBXParser.h"
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-Model::Model(uint64_t id, const Element &element, const Document &doc, const std::string &name) :
-        Object(id, element, name), shading("Y") {
-    const Scope &sc = GetRequiredScope(element);
-    const Element *const Shading = sc["Shading"];
-    const Element *const Culling = sc["Culling"];
-
-    if (Shading) {
-        shading = GetRequiredToken(*Shading, 0).StringContents();
-    }
-
-    if (Culling) {
-        culling = ParseTokenAsString(GetRequiredToken(*Culling, 0));
-    }
-
-    props = GetPropertyTable(doc, "Model.FbxNode", element, sc);
-    ResolveLinks(element, doc);
-}
-
-// ------------------------------------------------------------------------------------------------
-Model::~Model() {
-}
-
-// ------------------------------------------------------------------------------------------------
-void Model::ResolveLinks(const Element&, const Document &doc) {
-    const char *const arr[] = { "Geometry", "Material", "NodeAttribute" };
-
-    // resolve material
-    const std::vector<const Connection *> &conns = doc.GetConnectionsByDestinationSequenced(ID(), arr, 3);
-
-    materials.reserve(conns.size());
-    geometry.reserve(conns.size());
-    attributes.reserve(conns.size());
-    for (const Connection *con : conns) {
-
-        // material and geometry links should be Object-Object connections
-        if (con->PropertyName().length()) {
-            continue;
-        }
-
-        const Object *const ob = con->SourceObject();
-        if (!ob) {
-            DOMWarning("failed to read source object for incoming Model link, ignoring", &element);
-            continue;
-        }
-
-        const Material *const mat = dynamic_cast<const Material *>(ob);
-        if (mat) {
-            materials.push_back(mat);
-            continue;
-        }
-
-        const Geometry *const geo = dynamic_cast<const Geometry *>(ob);
-        if (geo) {
-            geometry.push_back(geo);
-            continue;
-        }
-
-        const NodeAttribute *const att = dynamic_cast<const NodeAttribute *>(ob);
-        if (att) {
-            attributes.push_back(att);
-            continue;
-        }
-
-        DOMWarning("source object for model link is neither Material, NodeAttribute nor Geometry, ignoring", &element);
-        continue;
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-bool Model::IsNull() const {
-    const std::vector<const NodeAttribute *> &attrs = GetAttributes();
-    for (const NodeAttribute *att : attrs) {
-
-        const Null *null_tag = dynamic_cast<const Null *>(att);
-        if (null_tag) {
-            return true;
-        }
-    }
-
-    return false;
-}
-
-} // namespace FBX
-} // namespace Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXNodeAttribute.cpp b/libs/assimp/code/AssetLib/FBX/FBXNodeAttribute.cpp
deleted file mode 100644
index a144f41..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXNodeAttribute.cpp
+++ /dev/null
@@ -1,170 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXNoteAttribute.cpp
- *  @brief Assimp::FBX::NodeAttribute (and subclasses) implementation
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXParser.h"
-#include "FBXDocument.h"
-#include "FBXImporter.h"
-#include "FBXDocumentUtil.h"
-
-namespace Assimp {
-namespace FBX {
-
-using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-NodeAttribute::NodeAttribute(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-: Object(id,element,name)
-, props()
-{
-    const Scope& sc = GetRequiredScope(element);
-
-    const std::string& classname = ParseTokenAsString(GetRequiredToken(element,2));
-
-    // hack on the deriving type but Null/LimbNode attributes are the only case in which
-    // the property table is by design absent and no warning should be generated
-    // for it.
-    const bool is_null_or_limb = !strcmp(classname.c_str(), "Null") || !strcmp(classname.c_str(), "LimbNode");
-    props = GetPropertyTable(doc,"NodeAttribute.Fbx" + classname,element,sc, is_null_or_limb);
-}
-
-
-// ------------------------------------------------------------------------------------------------
-NodeAttribute::~NodeAttribute()
-{
-    // empty
-}
-
-
-// ------------------------------------------------------------------------------------------------
-CameraSwitcher::CameraSwitcher(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-    : NodeAttribute(id,element,doc,name)
-{
-    const Scope& sc = GetRequiredScope(element);
-    const Element* const CameraId = sc["CameraId"];
-    const Element* const CameraName = sc["CameraName"];
-    const Element* const CameraIndexName = sc["CameraIndexName"];
-
-    if(CameraId) {
-        cameraId = ParseTokenAsInt(GetRequiredToken(*CameraId,0));
-    }
-
-    if(CameraName) {
-        cameraName = GetRequiredToken(*CameraName,0).StringContents();
-    }
-
-    if(CameraIndexName && CameraIndexName->Tokens().size()) {
-        cameraIndexName = GetRequiredToken(*CameraIndexName,0).StringContents();
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-CameraSwitcher::~CameraSwitcher()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-Camera::Camera(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-: NodeAttribute(id,element,doc,name)
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-Camera::~Camera()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-Light::Light(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-: NodeAttribute(id,element,doc,name)
-{
-    // empty
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Light::~Light()
-{
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Null::Null(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-: NodeAttribute(id,element,doc,name)
-{
-
-}
-
-
-// ------------------------------------------------------------------------------------------------
-Null::~Null()
-{
-
-}
-
-
-// ------------------------------------------------------------------------------------------------
-LimbNode::LimbNode(uint64_t id, const Element& element, const Document& doc, const std::string& name)
-: NodeAttribute(id,element,doc,name)
-{
-
-}
-
-
-// ------------------------------------------------------------------------------------------------
-LimbNode::~LimbNode()
-{
-
-}
-
-}
-}
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXParser.cpp b/libs/assimp/code/AssetLib/FBX/FBXParser.cpp
deleted file mode 100644
index e20377a..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXParser.cpp
+++ /dev/null
@@ -1,1314 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXParser.cpp
- *  @brief Implementation of the FBX parser and the rudimentary DOM that we use
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-//#ifdef ASSIMP_BUILD_NO_OWN_ZLIB
-#include "Common/Compression.h"
-//#   include <zlib.h>
-//#else
-//#   include "../contrib/zlib/zlib.h"
-//#endif
-
-#include "FBXTokenizer.h"
-#include "FBXParser.h"
-#include "FBXUtil.h"
-
-#include <assimp/ParsingUtils.h>
-#include <assimp/fast_atof.h>
-#include <assimp/ByteSwapper.h>
-#include <assimp/DefaultLogger.hpp>
-
-#include <iostream>
-
-using namespace Assimp;
-using namespace Assimp::FBX;
-
-namespace {
-
-    // ------------------------------------------------------------------------------------------------
-    // signal parse error, this is always unrecoverable. Throws DeadlyImportError.
-    AI_WONT_RETURN void ParseError(const std::string& message, const Token& token) AI_WONT_RETURN_SUFFIX;
-    AI_WONT_RETURN void ParseError(const std::string& message, const Token& token)
-    {
-        throw DeadlyImportError("FBX-Parser", Util::GetTokenText(&token), message);
-    }
-
-    // ------------------------------------------------------------------------------------------------
-    AI_WONT_RETURN void ParseError(const std::string &message, const Element *element = nullptr) AI_WONT_RETURN_SUFFIX;
-    AI_WONT_RETURN void ParseError(const std::string& message, const Element* element)
-    {
-        if(element) {
-            ParseError(message,element->KeyToken());
-        }
-        throw DeadlyImportError("FBX-Parser ", message);
-    }
-
-
-    // ------------------------------------------------------------------------------------------------
-    void ParseError(const std::string& message, TokenPtr token)
-    {
-        if(token) {
-            ParseError(message, *token);
-        }
-        ParseError(message);
-    }
-
-    // Initially, we did reinterpret_cast, breaking strict aliasing rules.
-    // This actually caused trouble on Android, so let's be safe this time.
-    // https://github.com/assimp/assimp/issues/24
-    template <typename T>
-    T SafeParse(const char* data, const char* end) {
-        // Actual size validation happens during Tokenization so
-        // this is valid as an assertion.
-        (void)(end);
-        ai_assert(static_cast<size_t>(end - data) >= sizeof(T));
-        T result = static_cast<T>(0);
-        ::memcpy(&result, data, sizeof(T));
-        return result;
-    }
-}
-
-namespace Assimp {
-namespace FBX {
-
-// ------------------------------------------------------------------------------------------------
-Element::Element(const Token& key_token, Parser& parser) : key_token(key_token) {
-    TokenPtr n = nullptr;
-    do {
-        n = parser.AdvanceToNextToken();
-        if(!n) {
-            ParseError("unexpected end of file, expected closing bracket",parser.LastToken());
-        }
-
-        if (n->Type() == TokenType_DATA) {
-            tokens.push_back(n);
-			TokenPtr prev = n;
-            n = parser.AdvanceToNextToken();
-            if(!n) {
-                ParseError("unexpected end of file, expected bracket, comma or key",parser.LastToken());
-            }
-
-			const TokenType ty = n->Type();
-
-			// some exporters are missing a comma on the next line
-			if (ty == TokenType_DATA && prev->Type() == TokenType_DATA && (n->Line() == prev->Line() + 1)) {
-				tokens.push_back(n);
-				continue;
-			}
-
-            if (ty != TokenType_OPEN_BRACKET && ty != TokenType_CLOSE_BRACKET && ty != TokenType_COMMA && ty != TokenType_KEY) {
-                ParseError("unexpected token; expected bracket, comma or key",n);
-            }
-        }
-
-        if (n->Type() == TokenType_OPEN_BRACKET) {
-            compound.reset(new Scope(parser));
-
-            // current token should be a TOK_CLOSE_BRACKET
-            n = parser.CurrentToken();
-            ai_assert(n);
-
-            if (n->Type() != TokenType_CLOSE_BRACKET) {
-                ParseError("expected closing bracket",n);
-            }
-
-            parser.AdvanceToNextToken();
-            return;
-        }
-    }
-    while(n->Type() != TokenType_KEY && n->Type() != TokenType_CLOSE_BRACKET);
-}
-
-// ------------------------------------------------------------------------------------------------
-Element::~Element()
-{
-     // no need to delete tokens, they are owned by the parser
-}
-
-// ------------------------------------------------------------------------------------------------
-Scope::Scope(Parser& parser,bool topLevel)
-{
-    if(!topLevel) {
-        TokenPtr t = parser.CurrentToken();
-        if (t->Type() != TokenType_OPEN_BRACKET) {
-            ParseError("expected open bracket",t);
-        }
-    }
-
-    TokenPtr n = parser.AdvanceToNextToken();
-    if (n == nullptr) {
-        ParseError("unexpected end of file");
-    }
-
-    // note: empty scopes are allowed
-    while(n->Type() != TokenType_CLOSE_BRACKET) {
-        if (n->Type() != TokenType_KEY) {
-            ParseError("unexpected token, expected TOK_KEY",n);
-        }
-
-        const std::string& str = n->StringContents();
-        if (str.empty()) {
-            ParseError("unexpected content: empty string.");
-        }
-        
-        elements.insert(ElementMap::value_type(str,new_Element(*n,parser)));
-
-        // Element() should stop at the next Key token (or right after a Close token)
-        n = parser.CurrentToken();
-        if (n == nullptr) {
-            if (topLevel) {
-                return;
-            }
-            ParseError("unexpected end of file",parser.LastToken());
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-Scope::~Scope() {
-    for(ElementMap::value_type& v : elements) {
-        delete v.second;
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-Parser::Parser (const TokenList& tokens, bool is_binary)
-: tokens(tokens)
-, last()
-, current()
-, cursor(tokens.begin())
-, is_binary(is_binary)
-{
-    ASSIMP_LOG_DEBUG("Parsing FBX tokens");
-    root.reset(new Scope(*this,true));
-}
-
-// ------------------------------------------------------------------------------------------------
-Parser::~Parser()
-{
-    // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-TokenPtr Parser::AdvanceToNextToken()
-{
-    last = current;
-    if (cursor == tokens.end()) {
-        current = nullptr;
-    } else {
-        current = *cursor++;
-    }
-    return current;
-}
-
-// ------------------------------------------------------------------------------------------------
-TokenPtr Parser::CurrentToken() const
-{
-    return current;
-}
-
-// ------------------------------------------------------------------------------------------------
-TokenPtr Parser::LastToken() const
-{
-    return last;
-}
-
-// ------------------------------------------------------------------------------------------------
-uint64_t ParseTokenAsID(const Token& t, const char*& err_out)
-{
-    err_out = nullptr;
-
-    if (t.Type() != TokenType_DATA) {
-        err_out = "expected TOK_DATA token";
-        return 0L;
-    }
-
-    if(t.IsBinary())
-    {
-        const char* data = t.begin();
-        if (data[0] != 'L') {
-            err_out = "failed to parse ID, unexpected data type, expected L(ong) (binary)";
-            return 0L;
-        }
-
-        BE_NCONST uint64_t id = SafeParse<uint64_t>(data+1, t.end());
-        AI_SWAP8(id);
-        return id;
-    }
-
-    // XXX: should use size_t here
-    unsigned int length = static_cast<unsigned int>(t.end() - t.begin());
-    ai_assert(length > 0);
-
-    const char* out = nullptr;
-    const uint64_t id = strtoul10_64(t.begin(),&out,&length);
-    if (out > t.end()) {
-        err_out = "failed to parse ID (text)";
-        return 0L;
-    }
-
-    return id;
-}
-
-// ------------------------------------------------------------------------------------------------
-size_t ParseTokenAsDim(const Token& t, const char*& err_out)
-{
-    // same as ID parsing, except there is a trailing asterisk
-    err_out = nullptr;
-
-    if (t.Type() != TokenType_DATA) {
-        err_out = "expected TOK_DATA token";
-        return 0;
-    }
-
-    if(t.IsBinary())
-    {
-        const char* data = t.begin();
-        if (data[0] != 'L') {
-            err_out = "failed to parse ID, unexpected data type, expected L(ong) (binary)";
-            return 0;
-        }
-
-        BE_NCONST uint64_t id = SafeParse<uint64_t>(data+1, t.end());
-        AI_SWAP8(id);
-        return static_cast<size_t>(id);
-    }
-
-    if(*t.begin() != '*') {
-        err_out = "expected asterisk before array dimension";
-        return 0;
-    }
-
-    // XXX: should use size_t here
-    unsigned int length = static_cast<unsigned int>(t.end() - t.begin());
-    if(length == 0) {
-        err_out = "expected valid integer number after asterisk";
-        return 0;
-    }
-
-    const char* out = nullptr;
-    const size_t id = static_cast<size_t>(strtoul10_64(t.begin() + 1,&out,&length));
-    if (out > t.end()) {
-        err_out = "failed to parse ID";
-        return 0;
-    }
-
-    return id;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-float ParseTokenAsFloat(const Token& t, const char*& err_out)
-{
-    err_out = nullptr;
-
-    if (t.Type() != TokenType_DATA) {
-        err_out = "expected TOK_DATA token";
-        return 0.0f;
-    }
-
-    if(t.IsBinary())
-    {
-        const char* data = t.begin();
-        if (data[0] != 'F' && data[0] != 'D') {
-            err_out = "failed to parse F(loat) or D(ouble), unexpected data type (binary)";
-            return 0.0f;
-        }
-
-        if (data[0] == 'F') {
-            return SafeParse<float>(data+1, t.end());
-        }
-        else {
-            return static_cast<float>( SafeParse<double>(data+1, t.end()) );
-        }
-    }
-
-    // need to copy the input string to a temporary buffer
-    // first - next in the fbx token stream comes ',',
-    // which fast_atof could interpret as decimal point.
-#define MAX_FLOAT_LENGTH 31
-    const size_t length = static_cast<size_t>(t.end()-t.begin());
-    if (length > MAX_FLOAT_LENGTH) {
-        return 0.f;
-    }
-
-    char temp[MAX_FLOAT_LENGTH + 1];
-    std::copy(t.begin(), t.end(), temp);
-    temp[std::min(static_cast<size_t>(MAX_FLOAT_LENGTH),length)] = '\0';
-
-    return fast_atof(temp);
-}
-
-
-// ------------------------------------------------------------------------------------------------
-int ParseTokenAsInt(const Token& t, const char*& err_out)
-{
-    err_out = nullptr;
-
-    if (t.Type() != TokenType_DATA) {
-        err_out = "expected TOK_DATA token";
-        return 0;
-    }
-
-    if(t.IsBinary())
-    {
-        const char* data = t.begin();
-        if (data[0] != 'I') {
-            err_out = "failed to parse I(nt), unexpected data type (binary)";
-            return 0;
-        }
-
-        BE_NCONST int32_t ival = SafeParse<int32_t>(data+1, t.end());
-        AI_SWAP4(ival);
-        return static_cast<int>(ival);
-    }
-
-    ai_assert(static_cast<size_t>(t.end() - t.begin()) > 0);
-
-    const char* out;
-    const int intval = strtol10(t.begin(),&out);
-    if (out != t.end()) {
-        err_out = "failed to parse ID";
-        return 0;
-    }
-
-    return intval;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-int64_t ParseTokenAsInt64(const Token& t, const char*& err_out)
-{
-    err_out = nullptr;
-
-    if (t.Type() != TokenType_DATA) {
-        err_out = "expected TOK_DATA token";
-        return 0L;
-    }
-
-    if (t.IsBinary())
-    {
-        const char* data = t.begin();
-        if (data[0] != 'L') {
-            err_out = "failed to parse Int64, unexpected data type";
-            return 0L;
-        }
-
-        BE_NCONST int64_t id = SafeParse<int64_t>(data + 1, t.end());
-        AI_SWAP8(id);
-        return id;
-    }
-
-    // XXX: should use size_t here
-    unsigned int length = static_cast<unsigned int>(t.end() - t.begin());
-    ai_assert(length > 0);
-
-    const char* out = nullptr;
-    const int64_t id = strtol10_64(t.begin(), &out, &length);
-    if (out > t.end()) {
-        err_out = "failed to parse Int64 (text)";
-        return 0L;
-    }
-
-    return id;
-}
-
-// ------------------------------------------------------------------------------------------------
-std::string ParseTokenAsString(const Token& t, const char*& err_out)
-{
-    err_out = nullptr;
-
-    if (t.Type() != TokenType_DATA) {
-        err_out = "expected TOK_DATA token";
-        return std::string();
-    }
-
-    if(t.IsBinary())
-    {
-        const char* data = t.begin();
-        if (data[0] != 'S') {
-            err_out = "failed to parse S(tring), unexpected data type (binary)";
-            return std::string();
-        }
-
-        // read string length
-        BE_NCONST int32_t len = SafeParse<int32_t>(data+1, t.end());
-        AI_SWAP4(len);
-
-        ai_assert(t.end() - data == 5 + len);
-        return std::string(data + 5, len);
-    }
-
-    const size_t length = static_cast<size_t>(t.end() - t.begin());
-    if(length < 2) {
-        err_out = "token is too short to hold a string";
-        return std::string();
-    }
-
-    const char* s = t.begin(), *e = t.end() - 1;
-    if (*s != '\"' || *e != '\"') {
-        err_out = "expected double quoted string";
-        return std::string();
-    }
-
-    return std::string(s+1,length-2);
-}
-
-
-namespace {
-
-// ------------------------------------------------------------------------------------------------
-// read the type code and element count of a binary data array and stop there
-void ReadBinaryDataArrayHead(const char*& data, const char* end, char& type, uint32_t& count,
-    const Element& el)
-{
-    if (static_cast<size_t>(end-data) < 5) {
-        ParseError("binary data array is too short, need five (5) bytes for type signature and element count",&el);
-    }
-
-    // data type
-    type = *data;
-
-    // read number of elements
-    BE_NCONST uint32_t len = SafeParse<uint32_t>(data+1, end);
-    AI_SWAP4(len);
-
-    count = len;
-    data += 5;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// read binary data array, assume cursor points to the 'compression mode' field (i.e. behind the header)
-void ReadBinaryDataArray(char type, uint32_t count, const char*& data, const char* end,
-        std::vector<char>& buff, const Element& /*el*/) {
-    BE_NCONST uint32_t encmode = SafeParse<uint32_t>(data, end);
-    AI_SWAP4(encmode);
-    data += 4;
-
-    // next comes the compressed length
-    BE_NCONST uint32_t comp_len = SafeParse<uint32_t>(data, end);
-    AI_SWAP4(comp_len);
-    data += 4;
-
-    ai_assert(data + comp_len == end);
-
-    // determine the length of the uncompressed data by looking at the type signature
-    uint32_t stride = 0;
-    switch(type)
-    {
-        case 'f':
-        case 'i':
-            stride = 4;
-            break;
-
-        case 'd':
-        case 'l':
-            stride = 8;
-            break;
-
-        default:
-            ai_assert(false);
-    };
-
-    const uint32_t full_length = stride * count;
-    buff.resize(full_length);
-
-    if(encmode == 0) {
-        ai_assert(full_length == comp_len);
-
-        // plain data, no compression
-        std::copy(data, end, buff.begin());
-    }
-    else if(encmode == 1) {
-        // zlib/deflate, next comes ZIP head (0x78 0x01)
-        // see http://www.ietf.org/rfc/rfc1950.txt
-         Compression compress;
-        if (compress.open(Compression::Format::Binary, Compression::FlushMode::Finish, 0)) {
-            compress.decompress(data, comp_len, buff);
-            compress.close();
-        }
-    }
-#ifdef ASSIMP_BUILD_DEBUG
-    else {
-        // runtime check for this happens at tokenization stage
-        ai_assert(false);
-    }
-#endif
-
-    data += comp_len;
-    ai_assert(data == end);
-}
-
-} // !anon
-
-
-// ------------------------------------------------------------------------------------------------
-// read an array of float3 tuples
-void ParseVectorDataArray(std::vector<aiVector3D>& out, const Element& el)
-{
-    out.resize( 0 );
-
-    const TokenList& tok = el.Tokens();
-    if(tok.empty()) {
-        ParseError("unexpected empty element",&el);
-    }
-
-    if(tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if(count % 3 != 0) {
-            ParseError("number of floats is not a multiple of three (3) (binary)",&el);
-        }
-
-        if(!count) {
-            return;
-        }
-
-        if (type != 'd' && type != 'f') {
-            ParseError("expected float or double array (binary)",&el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * (type == 'd' ? 8 : 4);
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        const uint32_t count3 = count / 3;
-        out.reserve(count3);
-
-        if (type == 'd') {
-            const double* d = reinterpret_cast<const double*>(&buff[0]);
-            for (unsigned int i = 0; i < count3; ++i, d += 3) {
-                out.push_back(aiVector3D(static_cast<ai_real>(d[0]),
-                    static_cast<ai_real>(d[1]),
-                    static_cast<ai_real>(d[2])));
-            }
-            // for debugging
-            /*for ( size_t i = 0; i < out.size(); i++ ) {
-                aiVector3D vec3( out[ i ] );
-                std::stringstream stream;
-                stream << " vec3.x = " << vec3.x << " vec3.y = " << vec3.y << " vec3.z = " << vec3.z << std::endl;
-                DefaultLogger::get()->info( stream.str() );
-            }*/
-        }
-        else if (type == 'f') {
-            const float* f = reinterpret_cast<const float*>(&buff[0]);
-            for (unsigned int i = 0; i < count3; ++i, f += 3) {
-                out.push_back(aiVector3D(f[0],f[1],f[2]));
-            }
-        }
-
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    // may throw bad_alloc if the input is rubbish, but this need
-    // not to be prevented - importing would fail but we wouldn't
-    // crash since assimp handles this case properly.
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope,"a",&el);
-
-    if (a.Tokens().size() % 3 != 0) {
-        ParseError("number of floats is not a multiple of three (3)",&el);
-    }
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
-        aiVector3D v;
-        v.x = ParseTokenAsFloat(**it++);
-        v.y = ParseTokenAsFloat(**it++);
-        v.z = ParseTokenAsFloat(**it++);
-
-        out.push_back(v);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// read an array of color4 tuples
-void ParseVectorDataArray(std::vector<aiColor4D>& out, const Element& el)
-{
-    out.resize( 0 );
-    const TokenList& tok = el.Tokens();
-    if(tok.empty()) {
-        ParseError("unexpected empty element",&el);
-    }
-
-    if(tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if(count % 4 != 0) {
-            ParseError("number of floats is not a multiple of four (4) (binary)",&el);
-        }
-
-        if(!count) {
-            return;
-        }
-
-        if (type != 'd' && type != 'f') {
-            ParseError("expected float or double array (binary)",&el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * (type == 'd' ? 8 : 4);
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        const uint32_t count4 = count / 4;
-        out.reserve(count4);
-
-        if (type == 'd') {
-            const double* d = reinterpret_cast<const double*>(&buff[0]);
-            for (unsigned int i = 0; i < count4; ++i, d += 4) {
-                out.push_back(aiColor4D(static_cast<float>(d[0]),
-                    static_cast<float>(d[1]),
-                    static_cast<float>(d[2]),
-                    static_cast<float>(d[3])));
-            }
-        }
-        else if (type == 'f') {
-            const float* f = reinterpret_cast<const float*>(&buff[0]);
-            for (unsigned int i = 0; i < count4; ++i, f += 4) {
-                out.push_back(aiColor4D(f[0],f[1],f[2],f[3]));
-            }
-        }
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    //  see notes in ParseVectorDataArray() above
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope,"a",&el);
-
-    if (a.Tokens().size() % 4 != 0) {
-        ParseError("number of floats is not a multiple of four (4)",&el);
-    }
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
-        aiColor4D v;
-        v.r = ParseTokenAsFloat(**it++);
-        v.g = ParseTokenAsFloat(**it++);
-        v.b = ParseTokenAsFloat(**it++);
-        v.a = ParseTokenAsFloat(**it++);
-
-        out.push_back(v);
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// read an array of float2 tuples
-void ParseVectorDataArray(std::vector<aiVector2D>& out, const Element& el) {
-    out.resize( 0 );
-    const TokenList& tok = el.Tokens();
-    if(tok.empty()) {
-        ParseError("unexpected empty element",&el);
-    }
-
-    if(tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if(count % 2 != 0) {
-            ParseError("number of floats is not a multiple of two (2) (binary)",&el);
-        }
-
-        if(!count) {
-            return;
-        }
-
-        if (type != 'd' && type != 'f') {
-            ParseError("expected float or double array (binary)",&el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * (type == 'd' ? 8 : 4);
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        const uint32_t count2 = count / 2;
-        out.reserve(count2);
-
-        if (type == 'd') {
-            const double* d = reinterpret_cast<const double*>(&buff[0]);
-            for (unsigned int i = 0; i < count2; ++i, d += 2) {
-                out.push_back(aiVector2D(static_cast<float>(d[0]),
-                    static_cast<float>(d[1])));
-            }
-        } else if (type == 'f') {
-            const float* f = reinterpret_cast<const float*>(&buff[0]);
-            for (unsigned int i = 0; i < count2; ++i, f += 2) {
-                out.push_back(aiVector2D(f[0],f[1]));
-            }
-        }
-
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    // see notes in ParseVectorDataArray() above
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope,"a",&el);
-
-    if (a.Tokens().size() % 2 != 0) {
-        ParseError("number of floats is not a multiple of two (2)",&el);
-    }
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
-        aiVector2D v;
-        v.x = ParseTokenAsFloat(**it++);
-        v.y = ParseTokenAsFloat(**it++);
-
-        out.push_back(v);
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// read an array of ints
-void ParseVectorDataArray(std::vector<int>& out, const Element& el) {
-    out.resize( 0 );
-    const TokenList& tok = el.Tokens();
-    if(tok.empty()) {
-        ParseError("unexpected empty element",&el);
-    }
-
-    if(tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if(!count) {
-            return;
-        }
-
-        if (type != 'i') {
-            ParseError("expected int array (binary)",&el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * 4;
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        out.reserve(count);
-
-        const int32_t* ip = reinterpret_cast<const int32_t*>(&buff[0]);
-        for (unsigned int i = 0; i < count; ++i, ++ip) {
-            BE_NCONST int32_t val = *ip;
-            AI_SWAP4(val);
-            out.push_back(val);
-        }
-
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    // see notes in ParseVectorDataArray()
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope,"a",&el);
-
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
-        const int ival = ParseTokenAsInt(**it++);
-        out.push_back(ival);
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// read an array of floats
-void ParseVectorDataArray(std::vector<float>& out, const Element& el)
-{
-    out.resize( 0 );
-    const TokenList& tok = el.Tokens();
-    if(tok.empty()) {
-        ParseError("unexpected empty element",&el);
-    }
-
-    if(tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if(!count) {
-            return;
-        }
-
-        if (type != 'd' && type != 'f') {
-            ParseError("expected float or double array (binary)",&el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * (type == 'd' ? 8 : 4);
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        if (type == 'd') {
-            const double* d = reinterpret_cast<const double*>(&buff[0]);
-            for (unsigned int i = 0; i < count; ++i, ++d) {
-                out.push_back(static_cast<float>(*d));
-            }
-        }
-        else if (type == 'f') {
-            const float* f = reinterpret_cast<const float*>(&buff[0]);
-            for (unsigned int i = 0; i < count; ++i, ++f) {
-                out.push_back(*f);
-            }
-        }
-
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    // see notes in ParseVectorDataArray()
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope,"a",&el);
-
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
-        const float ival = ParseTokenAsFloat(**it++);
-        out.push_back(ival);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// read an array of uints
-void ParseVectorDataArray(std::vector<unsigned int>& out, const Element& el)
-{
-    out.resize( 0 );
-    const TokenList& tok = el.Tokens();
-    if(tok.empty()) {
-        ParseError("unexpected empty element",&el);
-    }
-
-    if(tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if(!count) {
-            return;
-        }
-
-        if (type != 'i') {
-            ParseError("expected (u)int array (binary)",&el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * 4;
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        out.reserve(count);
-
-        const int32_t* ip = reinterpret_cast<const int32_t*>(&buff[0]);
-        for (unsigned int i = 0; i < count; ++i, ++ip) {
-            BE_NCONST int32_t val = *ip;
-            if(val < 0) {
-                ParseError("encountered negative integer index (binary)");
-            }
-
-            AI_SWAP4(val);
-            out.push_back(val);
-        }
-
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    // see notes in ParseVectorDataArray()
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope,"a",&el);
-
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
-        const int ival = ParseTokenAsInt(**it++);
-        if(ival < 0) {
-            ParseError("encountered negative integer index");
-        }
-        out.push_back(static_cast<unsigned int>(ival));
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// read an array of uint64_ts
-void ParseVectorDataArray(std::vector<uint64_t>& out, const Element& el)
-{
-    out.resize( 0 );
-    const TokenList& tok = el.Tokens();
-    if(tok.empty()) {
-        ParseError("unexpected empty element",&el);
-    }
-
-    if(tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if(!count) {
-            return;
-        }
-
-        if (type != 'l') {
-            ParseError("expected long array (binary)",&el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * 8;
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        out.reserve(count);
-
-        const uint64_t* ip = reinterpret_cast<const uint64_t*>(&buff[0]);
-        for (unsigned int i = 0; i < count; ++i, ++ip) {
-            BE_NCONST uint64_t val = *ip;
-            AI_SWAP8(val);
-            out.push_back(val);
-        }
-
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    // see notes in ParseVectorDataArray()
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope,"a",&el);
-
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end; ) {
-        const uint64_t ival = ParseTokenAsID(**it++);
-
-        out.push_back(ival);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// read an array of int64_ts
-void ParseVectorDataArray(std::vector<int64_t>& out, const Element& el)
-{
-    out.resize( 0 );
-    const TokenList& tok = el.Tokens();
-    if (tok.empty()) {
-        ParseError("unexpected empty element", &el);
-    }
-
-    if (tok[0]->IsBinary()) {
-        const char* data = tok[0]->begin(), *end = tok[0]->end();
-
-        char type;
-        uint32_t count;
-        ReadBinaryDataArrayHead(data, end, type, count, el);
-
-        if (!count) {
-            return;
-        }
-
-        if (type != 'l') {
-            ParseError("expected long array (binary)", &el);
-        }
-
-        std::vector<char> buff;
-        ReadBinaryDataArray(type, count, data, end, buff, el);
-
-        ai_assert(data == end);
-        uint64_t dataToRead = static_cast<uint64_t>(count) * 8;
-        if (dataToRead != buff.size()) {
-            ParseError("Invalid read size (binary)",&el);
-        }
-
-        out.reserve(count);
-
-        const int64_t* ip = reinterpret_cast<const int64_t*>(&buff[0]);
-        for (unsigned int i = 0; i < count; ++i, ++ip) {
-            BE_NCONST int64_t val = *ip;
-            AI_SWAP8(val);
-            out.push_back(val);
-        }
-
-        return;
-    }
-
-    const size_t dim = ParseTokenAsDim(*tok[0]);
-
-    // see notes in ParseVectorDataArray()
-    out.reserve(dim);
-
-    const Scope& scope = GetRequiredScope(el);
-    const Element& a = GetRequiredElement(scope, "a", &el);
-
-    for (TokenList::const_iterator it = a.Tokens().begin(), end = a.Tokens().end(); it != end;) {
-        const int64_t ival = ParseTokenAsInt64(**it++);
-
-        out.push_back(ival);
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-aiMatrix4x4 ReadMatrix(const Element& element)
-{
-    std::vector<float> values;
-    ParseVectorDataArray(values,element);
-
-    if(values.size() != 16) {
-        ParseError("expected 16 matrix elements");
-    }
-
-    aiMatrix4x4 result;
-
-
-    result.a1 = values[0];
-    result.a2 = values[1];
-    result.a3 = values[2];
-    result.a4 = values[3];
-
-    result.b1 = values[4];
-    result.b2 = values[5];
-    result.b3 = values[6];
-    result.b4 = values[7];
-
-    result.c1 = values[8];
-    result.c2 = values[9];
-    result.c3 = values[10];
-    result.c4 = values[11];
-
-    result.d1 = values[12];
-    result.d2 = values[13];
-    result.d3 = values[14];
-    result.d4 = values[15];
-
-    result.Transpose();
-    return result;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// wrapper around ParseTokenAsString() with ParseError handling
-std::string ParseTokenAsString(const Token& t)
-{
-    const char* err;
-    const std::string& i = ParseTokenAsString(t,err);
-    if(err) {
-        ParseError(err,t);
-    }
-    return i;
-}
-
-bool HasElement( const Scope& sc, const std::string& index ) {
-    const Element* el = sc[ index ];
-    if ( nullptr == el ) {
-        return false;
-    }
-
-    return true;
-}
-
-// ------------------------------------------------------------------------------------------------
-// extract a required element from a scope, abort if the element cannot be found
-const Element& GetRequiredElement(const Scope& sc, const std::string& index, const Element* element /*= nullptr*/)
-{
-    const Element* el = sc[index];
-    if(!el) {
-        ParseError("did not find required element \"" + index + "\"",element);
-    }
-    return *el;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// extract required compound scope
-const Scope& GetRequiredScope(const Element& el)
-{
-    const Scope* const s = el.Compound();
-    if(!s) {
-        ParseError("expected compound scope",&el);
-    }
-
-    return *s;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// get token at a particular index
-const Token& GetRequiredToken(const Element& el, unsigned int index)
-{
-    const TokenList& t = el.Tokens();
-    if(index >= t.size()) {
-        ParseError(Formatter::format( "missing token at index " ) << index,&el);
-    }
-
-    return *t[index];
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// wrapper around ParseTokenAsID() with ParseError handling
-uint64_t ParseTokenAsID(const Token& t)
-{
-    const char* err;
-    const uint64_t i = ParseTokenAsID(t,err);
-    if(err) {
-        ParseError(err,t);
-    }
-    return i;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// wrapper around ParseTokenAsDim() with ParseError handling
-size_t ParseTokenAsDim(const Token& t)
-{
-    const char* err;
-    const size_t i = ParseTokenAsDim(t,err);
-    if(err) {
-        ParseError(err,t);
-    }
-    return i;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// wrapper around ParseTokenAsFloat() with ParseError handling
-float ParseTokenAsFloat(const Token& t)
-{
-    const char* err;
-    const float i = ParseTokenAsFloat(t,err);
-    if(err) {
-        ParseError(err,t);
-    }
-    return i;
-}
-
-// ------------------------------------------------------------------------------------------------
-// wrapper around ParseTokenAsInt() with ParseError handling
-int ParseTokenAsInt(const Token& t)
-{
-    const char* err;
-    const int i = ParseTokenAsInt(t,err);
-    if(err) {
-        ParseError(err,t);
-    }
-    return i;
-}
-
-// ------------------------------------------------------------------------------------------------
-// wrapper around ParseTokenAsInt64() with ParseError handling
-int64_t ParseTokenAsInt64(const Token& t)
-{
-    const char* err;
-    const int64_t i = ParseTokenAsInt64(t, err);
-    if (err) {
-        ParseError(err, t);
-    }
-    return i;
-}
-
-} // !FBX
-} // !Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXParser.h b/libs/assimp/code/AssetLib/FBX/FBXParser.h
deleted file mode 100644
index 314481e..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXParser.h
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXParser.h
- *  @brief FBX parsing code
- */
-#ifndef INCLUDED_AI_FBX_PARSER_H
-#define INCLUDED_AI_FBX_PARSER_H
-
-#include <stdint.h>
-#include <map>
-#include <memory>
-#include <vector>
-#include <assimp/LogAux.h>
-#include <assimp/fast_atof.h>
-
-#include "FBXCompileConfig.h"
-#include "FBXTokenizer.h"
-
-namespace Assimp {
-namespace FBX {
-
-class Scope;
-class Parser;
-class Element;
-
-// XXX should use C++11's unique_ptr - but assimp's need to keep working with 03
-typedef std::vector< Scope* > ScopeList;
-typedef std::fbx_unordered_multimap< std::string, Element* > ElementMap;
-
-typedef std::pair<ElementMap::const_iterator,ElementMap::const_iterator> ElementCollection;
-
-#   define new_Scope new Scope
-#   define new_Element new Element
-
-
-/** FBX data entity that consists of a key:value tuple.
- *
- *  Example:
- *  @verbatim
- *    AnimationCurve: 23, "AnimCurve::", "" {
- *        [..]
- *    }
- *  @endverbatim
- *
- *  As can be seen in this sample, elements can contain nested #Scope
- *  as their trailing member.  **/
-class Element
-{
-public:
-    Element(const Token& key_token, Parser& parser);
-    ~Element();
-
-    const Scope* Compound() const {
-        return compound.get();
-    }
-
-    const Token& KeyToken() const {
-        return key_token;
-    }
-
-    const TokenList& Tokens() const {
-        return tokens;
-    }
-
-private:
-    const Token& key_token;
-    TokenList tokens;
-    std::unique_ptr<Scope> compound;
-};
-
-/** FBX data entity that consists of a 'scope', a collection
- *  of not necessarily unique #Element instances.
- *
- *  Example:
- *  @verbatim
- *    GlobalSettings:  {
- *        Version: 1000
- *        Properties70:
- *        [...]
- *    }
- *  @endverbatim  */
-class Scope
-{
-public:
-    Scope(Parser& parser, bool topLevel = false);
-    ~Scope();
-
-    const Element* operator[] (const std::string& index) const {
-        ElementMap::const_iterator it = elements.find(index);
-        return it == elements.end() ? nullptr : (*it).second;
-    }
-
-	const Element* FindElementCaseInsensitive(const std::string& elementName) const {
-		const char* elementNameCStr = elementName.c_str();
-		for (auto element = elements.begin(); element != elements.end(); ++element)
-		{
-			if (!ASSIMP_strincmp(element->first.c_str(), elementNameCStr, MAXLEN)) {
-				return element->second;
-			}
-		}
-        return nullptr;
-	}
-
-    ElementCollection GetCollection(const std::string& index) const {
-        return elements.equal_range(index);
-    }
-
-    const ElementMap& Elements() const  {
-        return elements;
-    }
-
-private:
-    ElementMap elements;
-};
-
-/** FBX parsing class, takes a list of input tokens and generates a hierarchy
- *  of nested #Scope instances, representing the fbx DOM.*/
-class Parser
-{
-public:
-    /** Parse given a token list. Does not take ownership of the tokens -
-     *  the objects must persist during the entire parser lifetime */
-    Parser (const TokenList& tokens,bool is_binary);
-    ~Parser();
-
-    const Scope& GetRootScope() const {
-        return *root.get();
-    }
-
-    bool IsBinary() const {
-        return is_binary;
-    }
-
-private:
-    friend class Scope;
-    friend class Element;
-
-    TokenPtr AdvanceToNextToken();
-    TokenPtr LastToken() const;
-    TokenPtr CurrentToken() const;
-
-private:
-    const TokenList& tokens;
-
-    TokenPtr last, current;
-    TokenList::const_iterator cursor;
-    std::unique_ptr<Scope> root;
-
-    const bool is_binary;
-};
-
-
-/* token parsing - this happens when building the DOM out of the parse-tree*/
-uint64_t ParseTokenAsID(const Token& t, const char*& err_out);
-size_t ParseTokenAsDim(const Token& t, const char*& err_out);
-
-float ParseTokenAsFloat(const Token& t, const char*& err_out);
-int ParseTokenAsInt(const Token& t, const char*& err_out);
-int64_t ParseTokenAsInt64(const Token& t, const char*& err_out);
-std::string ParseTokenAsString(const Token& t, const char*& err_out);
-
-/* wrapper around ParseTokenAsXXX() with DOMError handling */
-uint64_t ParseTokenAsID(const Token& t);
-size_t ParseTokenAsDim(const Token& t);
-float ParseTokenAsFloat(const Token& t);
-int ParseTokenAsInt(const Token& t);
-int64_t ParseTokenAsInt64(const Token& t);
-std::string ParseTokenAsString(const Token& t);
-
-/* read data arrays */
-void ParseVectorDataArray(std::vector<aiVector3D>& out, const Element& el);
-void ParseVectorDataArray(std::vector<aiColor4D>& out, const Element& el);
-void ParseVectorDataArray(std::vector<aiVector2D>& out, const Element& el);
-void ParseVectorDataArray(std::vector<int>& out, const Element& el);
-void ParseVectorDataArray(std::vector<float>& out, const Element& el);
-void ParseVectorDataArray(std::vector<unsigned int>& out, const Element& el);
-void ParseVectorDataArray(std::vector<uint64_t>& out, const Element& e);
-void ParseVectorDataArray(std::vector<int64_t>& out, const Element& el);
-
-bool HasElement( const Scope& sc, const std::string& index );
-
-// extract a required element from a scope, abort if the element cannot be found
-const Element &GetRequiredElement(const Scope &sc, const std::string &index, const Element *element = nullptr);
-
-// extract required compound scope
-const Scope& GetRequiredScope(const Element& el);
-// get token at a particular index
-const Token& GetRequiredToken(const Element& el, unsigned int index);
-
-// read a 4x4 matrix from an array of 16 floats
-aiMatrix4x4 ReadMatrix(const Element& element);
-
-} // ! FBX
-} // ! Assimp
-
-#endif // ! INCLUDED_AI_FBX_PARSER_H
diff --git a/libs/assimp/code/AssetLib/FBX/FBXProperties.cpp b/libs/assimp/code/AssetLib/FBX/FBXProperties.cpp
deleted file mode 100644
index 7803c27..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXProperties.cpp
+++ /dev/null
@@ -1,270 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXProperties.cpp
- *  @brief Implementation of the FBX dynamic properties system
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-#include "FBXTokenizer.h"
-#include "FBXParser.h"
-#include "FBXDocument.h"
-#include "FBXDocumentUtil.h"
-#include "FBXProperties.h"
-
-#include <utility>
-
-namespace Assimp {
-namespace FBX {
-
-    using namespace Util;
-
-// ------------------------------------------------------------------------------------------------
-Property::Property()
-{
-}
-
-// ------------------------------------------------------------------------------------------------
-Property::~Property()
-{
-}
-
-namespace {
-
-void checkTokenCount(const TokenList& tok, unsigned int expectedCount)
-{
-    ai_assert(expectedCount >= 2);
-    if (tok.size() < expectedCount) {
-        const std::string& s = ParseTokenAsString(*tok[1]);
-        if (tok[1]->IsBinary()) {
-            throw DeadlyImportError("Not enough tokens for property of type ", s, " at offset ", tok[1]->Offset());
-        }
-        else {
-            throw DeadlyImportError("Not enough tokens for property of type ", s, " at line ", tok[1]->Line());
-        }
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-// read a typed property out of a FBX element. The return value is nullptr if the property cannot be read.
-Property* ReadTypedProperty(const Element& element)
-{
-    ai_assert(element.KeyToken().StringContents() == "P");
-
-    const TokenList& tok = element.Tokens();
-    if (tok.size() < 2) {
-        return nullptr;
-    }
-
-    const std::string& s = ParseTokenAsString(*tok[1]);
-    const char* const cs = s.c_str();
-    if (!strcmp(cs,"KString")) {
-        checkTokenCount(tok, 5);
-        return new TypedProperty<std::string>(ParseTokenAsString(*tok[4]));
-    }
-    else if (!strcmp(cs,"bool") || !strcmp(cs,"Bool")) {
-        checkTokenCount(tok, 5);
-        return new TypedProperty<bool>(ParseTokenAsInt(*tok[4]) != 0);
-    }
-    else if (!strcmp(cs, "int") || !strcmp(cs, "Int") || !strcmp(cs, "enum") || !strcmp(cs, "Enum") || !strcmp(cs, "Integer")) {
-        checkTokenCount(tok, 5);
-        return new TypedProperty<int>(ParseTokenAsInt(*tok[4]));
-    }
-    else if (!strcmp(cs, "ULongLong")) {
-        checkTokenCount(tok, 5);
-        return new TypedProperty<uint64_t>(ParseTokenAsID(*tok[4]));
-    }
-    else if (!strcmp(cs, "KTime")) {
-        checkTokenCount(tok, 5);
-        return new TypedProperty<int64_t>(ParseTokenAsInt64(*tok[4]));
-    }
-    else if (!strcmp(cs,"Vector3D") ||
-        !strcmp(cs,"ColorRGB") ||
-        !strcmp(cs,"Vector") ||
-        !strcmp(cs,"Color") ||
-        !strcmp(cs,"Lcl Translation") ||
-        !strcmp(cs,"Lcl Rotation") ||
-        !strcmp(cs,"Lcl Scaling")
-        ) {
-        checkTokenCount(tok, 7);
-        return new TypedProperty<aiVector3D>(aiVector3D(
-            ParseTokenAsFloat(*tok[4]),
-            ParseTokenAsFloat(*tok[5]),
-            ParseTokenAsFloat(*tok[6]))
-        );
-    }
-    else if (!strcmp(cs,"double") || !strcmp(cs,"Number") || !strcmp(cs,"float") || !strcmp(cs,"Float") || !strcmp(cs,"FieldOfView") || !strcmp( cs, "UnitScaleFactor" ) ) {
-        checkTokenCount(tok, 5);
-        return new TypedProperty<float>(ParseTokenAsFloat(*tok[4]));
-    }
-    else if (!strcmp(cs, "ColorAndAlpha")) {
-        checkTokenCount(tok, 8);
-        return new TypedProperty<aiColor4D>(aiColor4D(
-            ParseTokenAsFloat(*tok[4]),
-            ParseTokenAsFloat(*tok[5]),
-            ParseTokenAsFloat(*tok[6]),
-            ParseTokenAsFloat(*tok[7]))
-        );
-    }
-    return nullptr;
-}
-
-
-// ------------------------------------------------------------------------------------------------
-// peek into an element and check if it contains a FBX property, if so return its name.
-std::string PeekPropertyName(const Element& element)
-{
-    ai_assert(element.KeyToken().StringContents() == "P");
-    const TokenList& tok = element.Tokens();
-    if(tok.size() < 4) {
-        return std::string();
-    }
-
-    return ParseTokenAsString(*tok[0]);
-}
-
-} //! anon
-
-
-// ------------------------------------------------------------------------------------------------
-PropertyTable::PropertyTable()
-: templateProps()
-, element()
-{
-}
-
-// ------------------------------------------------------------------------------------------------
-PropertyTable::PropertyTable(const Element &element, std::shared_ptr<const PropertyTable> templateProps) :
-        templateProps(std::move(templateProps)), element(&element) {
-    const Scope& scope = GetRequiredScope(element);
-    for(const ElementMap::value_type& v : scope.Elements()) {
-        if(v.first != "P") {
-            DOMWarning("expected only P elements in property table",v.second);
-            continue;
-        }
-
-        const std::string& name = PeekPropertyName(*v.second);
-        if(!name.length()) {
-            DOMWarning("could not read property name",v.second);
-            continue;
-        }
-
-        LazyPropertyMap::const_iterator it = lazyProps.find(name);
-        if (it != lazyProps.end()) {
-            DOMWarning("duplicate property name, will hide previous value: " + name,v.second);
-            continue;
-        }
-
-        lazyProps[name] = v.second;
-    }
-}
-
-// ------------------------------------------------------------------------------------------------
-PropertyTable::~PropertyTable()
-{
-    for(PropertyMap::value_type& v : props) {
-        delete v.second;
-    }
-}
-
-
-// ------------------------------------------------------------------------------------------------
-const Property* PropertyTable::Get(const std::string& name) const
-{
-    PropertyMap::const_iterator it = props.find(name);
-    if (it == props.end()) {
-        // hasn't been parsed yet?
-        LazyPropertyMap::const_iterator lit = lazyProps.find(name);
-        if(lit != lazyProps.end()) {
-            props[name] = ReadTypedProperty(*(*lit).second);
-            it = props.find(name);
-
-            ai_assert(it != props.end());
-        }
-
-        if (it == props.end()) {
-            // check property template
-            if(templateProps) {
-                return templateProps->Get(name);
-            }
-
-            return nullptr;
-        }
-    }
-
-    return (*it).second;
-}
-
-DirectPropertyMap PropertyTable::GetUnparsedProperties() const
-{
-    DirectPropertyMap result;
-
-    // Loop through all the lazy properties (which is all the properties)
-    for(const LazyPropertyMap::value_type& currentElement : lazyProps) {
-
-        // Skip parsed properties
-        if (props.end() != props.find(currentElement.first)) {
-            continue;
-        }
-
-        // Read the element's value.
-        // Wrap the naked pointer (since the call site is required to acquire ownership)
-        // std::unique_ptr from C++11 would be preferred both as a wrapper and a return value.
-        std::shared_ptr<Property> prop = std::shared_ptr<Property>(ReadTypedProperty(*currentElement.second));
-
-        // Element could not be read. Skip it.
-        if (!prop) {
-            continue;
-        }
-
-        // Add to result
-        result[currentElement.first] = prop;
-    }
-
-    return result;
-}
-
-} //! FBX
-} //! Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXProperties.h b/libs/assimp/code/AssetLib/FBX/FBXProperties.h
deleted file mode 100644
index 1881611..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXProperties.h
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXProperties.h
- *  @brief FBX dynamic properties
- */
-#ifndef INCLUDED_AI_FBX_PROPERTIES_H
-#define INCLUDED_AI_FBX_PROPERTIES_H
-
-#include "FBXCompileConfig.h"
-#include <memory>
-#include <string>
-
-namespace Assimp {
-namespace FBX {
-
-// Forward declarations
-class Element;
-
-/** Represents a dynamic property. Type info added by deriving classes,
- *  see #TypedProperty.
- Example:
- @verbatim
-   P: "ShininessExponent", "double", "Number", "",0.5
- @endvebatim
-*/
-class Property {
-protected:
-    Property();
-
-public:
-    virtual ~Property();
-
-public:
-    template <typename T>
-    const T* As() const {
-        return dynamic_cast<const T*>(this);
-    }
-};
-
-template<typename T>
-class TypedProperty : public Property {
-public:
-    explicit TypedProperty(const T& value)
-    : value(value) {
-        // empty
-    }
-
-    const T& Value() const {
-        return value;
-    }
-
-private:
-    T value;
-};
-
-
-typedef std::fbx_unordered_map<std::string,std::shared_ptr<Property> > DirectPropertyMap;
-typedef std::fbx_unordered_map<std::string,const Property*>            PropertyMap;
-typedef std::fbx_unordered_map<std::string,const Element*>             LazyPropertyMap;
-
-/**
- *  Represents a property table as can be found in the newer FBX files (Properties60, Properties70)
- */
-class PropertyTable {
-public:
-    // in-memory property table with no source element
-    PropertyTable();
-    PropertyTable(const Element& element, std::shared_ptr<const PropertyTable> templateProps);
-    ~PropertyTable();
-
-    const Property* Get(const std::string& name) const;
-
-    // PropertyTable's need not be coupled with FBX elements so this can be nullptr
-    const Element* GetElement() const {
-        return element;
-    }
-
-    const PropertyTable* TemplateProps() const {
-        return templateProps.get();
-    }
-
-    DirectPropertyMap GetUnparsedProperties() const;
-
-private:
-    LazyPropertyMap lazyProps;
-    mutable PropertyMap props;
-    const std::shared_ptr<const PropertyTable> templateProps;
-    const Element* const element;
-};
-
-// ------------------------------------------------------------------------------------------------
-template <typename T>
-inline
-T PropertyGet(const PropertyTable& in, const std::string& name, const T& defaultValue) {
-    const Property* const prop = in.Get(name);
-    if( nullptr == prop) {
-        return defaultValue;
-    }
-
-    // strong typing, no need to be lenient
-    const TypedProperty<T>* const tprop = prop->As< TypedProperty<T> >();
-    if( nullptr == tprop) {
-        return defaultValue;
-    }
-
-    return tprop->Value();
-}
-
-// ------------------------------------------------------------------------------------------------
-template <typename T>
-inline
-T PropertyGet(const PropertyTable& in, const std::string& name, bool& result, bool useTemplate=false ) {
-    const Property* prop = in.Get(name);
-    if( nullptr == prop) {
-        if ( ! useTemplate ) {
-            result = false;
-            return T();
-        }
-        const PropertyTable* templ = in.TemplateProps();
-        if ( nullptr == templ ) {
-            result = false;
-            return T();
-        }
-        prop = templ->Get(name);
-        if ( nullptr == prop ) {
-            result = false;
-            return T();
-        }
-    }
-
-    // strong typing, no need to be lenient
-    const TypedProperty<T>* const tprop = prop->As< TypedProperty<T> >();
-    if( nullptr == tprop) {
-        result = false;
-        return T();
-    }
-
-    result = true;
-    return tprop->Value();
-}
-
-} //! FBX
-} //! Assimp
-
-#endif // INCLUDED_AI_FBX_PROPERTIES_H
diff --git a/libs/assimp/code/AssetLib/FBX/FBXTokenizer.cpp b/libs/assimp/code/AssetLib/FBX/FBXTokenizer.cpp
deleted file mode 100644
index 8698aba..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXTokenizer.cpp
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXTokenizer.cpp
- *  @brief Implementation of the FBX broadphase lexer
- */
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-// tab width for logging columns
-#define ASSIMP_FBX_TAB_WIDTH 4
-
-#include <assimp/ParsingUtils.h>
-
-#include "FBXTokenizer.h"
-#include "FBXUtil.h"
-#include <assimp/Exceptional.h>
-#include <assimp/DefaultLogger.hpp>
-
-namespace Assimp {
-namespace FBX {
-
-// ------------------------------------------------------------------------------------------------
-Token::Token(const char* sbegin, const char* send, TokenType type, unsigned int line, unsigned int column)
-    :
-#ifdef DEBUG
-    contents(sbegin, static_cast<size_t>(send-sbegin)),
-#endif
-    sbegin(sbegin)
-    , send(send)
-    , type(type)
-    , line(line)
-    , column(column)
-{
-    ai_assert(sbegin);
-    ai_assert(send);
-
-    // tokens must be of non-zero length
-    ai_assert(static_cast<size_t>(send-sbegin) > 0);
-}
-
-// ------------------------------------------------------------------------------------------------
-Token::~Token()
-{
-}
-
-namespace {
-
-// ------------------------------------------------------------------------------------------------
-// signal tokenization error, this is always unrecoverable. Throws DeadlyImportError.
-AI_WONT_RETURN void TokenizeError(const std::string& message, unsigned int line, unsigned int column) AI_WONT_RETURN_SUFFIX;
-AI_WONT_RETURN void TokenizeError(const std::string& message, unsigned int line, unsigned int column)
-{
-    throw DeadlyImportError("FBX-Tokenize", Util::GetLineAndColumnText(line,column), message);
-}
-
-
-// process a potential data token up to 'cur', adding it to 'output_tokens'.
-// ------------------------------------------------------------------------------------------------
-void ProcessDataToken( TokenList& output_tokens, const char*& start, const char*& end,
-                      unsigned int line,
-                      unsigned int column,
-                      TokenType type = TokenType_DATA,
-                      bool must_have_token = false)
-{
-    if (start && end) {
-        // sanity check:
-        // tokens should have no whitespace outside quoted text and [start,end] should
-        // properly delimit the valid range.
-        bool in_double_quotes = false;
-        for (const char* c = start; c != end + 1; ++c) {
-            if (*c == '\"') {
-                in_double_quotes = !in_double_quotes;
-            }
-
-            if (!in_double_quotes && IsSpaceOrNewLine(*c)) {
-                TokenizeError("unexpected whitespace in token", line, column);
-            }
-        }
-
-        if (in_double_quotes) {
-            TokenizeError("non-terminated double quotes", line, column);
-        }
-
-        output_tokens.push_back(new_Token(start,end + 1,type,line,column));
-    }
-    else if (must_have_token) {
-        TokenizeError("unexpected character, expected data token", line, column);
-    }
-
-    start = end = nullptr;
-}
-
-}
-
-// ------------------------------------------------------------------------------------------------
-void Tokenize(TokenList& output_tokens, const char* input)
-{
-	ai_assert(input);
-	ASSIMP_LOG_DEBUG("Tokenizing ASCII FBX file");
-
-    // line and column numbers numbers are one-based
-    unsigned int line = 1;
-    unsigned int column = 1;
-
-    bool comment = false;
-    bool in_double_quotes = false;
-    bool pending_data_token = false;
-
-    const char *token_begin = nullptr, *token_end = nullptr;
-    for (const char* cur = input;*cur;column += (*cur == '\t' ? ASSIMP_FBX_TAB_WIDTH : 1), ++cur) {
-        const char c = *cur;
-
-        if (IsLineEnd(c)) {
-            comment = false;
-
-            column = 0;
-            ++line;
-        }
-
-        if(comment) {
-            continue;
-        }
-
-        if(in_double_quotes) {
-            if (c == '\"') {
-                in_double_quotes = false;
-                token_end = cur;
-
-                ProcessDataToken(output_tokens,token_begin,token_end,line,column);
-                pending_data_token = false;
-            }
-            continue;
-        }
-
-        switch(c)
-        {
-        case '\"':
-            if (token_begin) {
-                TokenizeError("unexpected double-quote", line, column);
-            }
-            token_begin = cur;
-            in_double_quotes = true;
-            continue;
-
-        case ';':
-            ProcessDataToken(output_tokens,token_begin,token_end,line,column);
-            comment = true;
-            continue;
-
-        case '{':
-            ProcessDataToken(output_tokens,token_begin,token_end, line, column);
-            output_tokens.push_back(new_Token(cur,cur+1,TokenType_OPEN_BRACKET,line,column));
-            continue;
-
-        case '}':
-            ProcessDataToken(output_tokens,token_begin,token_end,line,column);
-            output_tokens.push_back(new_Token(cur,cur+1,TokenType_CLOSE_BRACKET,line,column));
-            continue;
-
-        case ',':
-            if (pending_data_token) {
-                ProcessDataToken(output_tokens,token_begin,token_end,line,column,TokenType_DATA,true);
-            }
-            output_tokens.push_back(new_Token(cur,cur+1,TokenType_COMMA,line,column));
-            continue;
-
-        case ':':
-            if (pending_data_token) {
-                ProcessDataToken(output_tokens,token_begin,token_end,line,column,TokenType_KEY,true);
-            }
-            else {
-                TokenizeError("unexpected colon", line, column);
-            }
-            continue;
-        }
-
-        if (IsSpaceOrNewLine(c)) {
-
-            if (token_begin) {
-                // peek ahead and check if the next token is a colon in which
-                // case this counts as KEY token.
-                TokenType type = TokenType_DATA;
-                for (const char* peek = cur;  *peek && IsSpaceOrNewLine(*peek); ++peek) {
-                    if (*peek == ':') {
-                        type = TokenType_KEY;
-                        cur = peek;
-                        break;
-                    }
-                }
-
-                ProcessDataToken(output_tokens,token_begin,token_end,line,column,type);
-            }
-
-            pending_data_token = false;
-        }
-        else {
-            token_end = cur;
-            if (!token_begin) {
-                token_begin = cur;
-            }
-
-            pending_data_token = true;
-        }
-    }
-}
-
-} // !FBX
-} // !Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXTokenizer.h b/libs/assimp/code/AssetLib/FBX/FBXTokenizer.h
deleted file mode 100644
index 8779509..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXTokenizer.h
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXTokenizer.h
- *  @brief FBX lexer
- */
-#ifndef INCLUDED_AI_FBX_TOKENIZER_H
-#define INCLUDED_AI_FBX_TOKENIZER_H
-
-#include "FBXCompileConfig.h"
-#include <assimp/ai_assert.h>
-#include <assimp/defs.h>
-#include <vector>
-#include <string>
-
-namespace Assimp {
-namespace FBX {
-
-/** Rough classification for text FBX tokens used for constructing the
- *  basic scope hierarchy. */
-enum TokenType
-{
-    // {
-    TokenType_OPEN_BRACKET = 0,
-
-    // }
-    TokenType_CLOSE_BRACKET,
-
-    // '"blablubb"', '2', '*14' - very general token class,
-    // further processing happens at a later stage.
-    TokenType_DATA,
-
-    //
-    TokenType_BINARY_DATA,
-
-    // ,
-    TokenType_COMMA,
-
-    // blubb:
-    TokenType_KEY
-};
-
-
-/** Represents a single token in a FBX file. Tokens are
- *  classified by the #TokenType enumerated types.
- *
- *  Offers iterator protocol. Tokens are immutable. */
-class Token
-{
-private:
-    static const unsigned int BINARY_MARKER = static_cast<unsigned int>(-1);
-
-public:
-    /** construct a textual token */
-    Token(const char* sbegin, const char* send, TokenType type, unsigned int line, unsigned int column);
-
-    /** construct a binary token */
-    Token(const char* sbegin, const char* send, TokenType type, size_t offset);
-
-    ~Token();
-
-public:
-    std::string StringContents() const {
-        return std::string(begin(),end());
-    }
-
-    bool IsBinary() const {
-        return column == BINARY_MARKER;
-    }
-
-    const char* begin() const {
-        return sbegin;
-    }
-
-    const char* end() const {
-        return send;
-    }
-
-    TokenType Type() const {
-        return type;
-    }
-
-    size_t Offset() const {
-        ai_assert(IsBinary());
-        return offset;
-    }
-
-    unsigned int Line() const {
-        ai_assert(!IsBinary());
-        return static_cast<unsigned int>(line);
-    }
-
-    unsigned int Column() const {
-        ai_assert(!IsBinary());
-        return column;
-    }
-
-private:
-
-#ifdef DEBUG
-    // full string copy for the sole purpose that it nicely appears
-    // in msvc's debugger window.
-    const std::string contents;
-#endif
-
-
-    const char* const sbegin;
-    const char* const send;
-    const TokenType type;
-
-    union {
-        size_t line;
-        size_t offset;
-    };
-    const unsigned int column;
-};
-
-// XXX should use C++11's unique_ptr - but assimp's need to keep working with 03
-typedef const Token* TokenPtr;
-typedef std::vector< TokenPtr > TokenList;
-
-#define new_Token new Token
-
-
-/** Main FBX tokenizer function. Transform input buffer into a list of preprocessed tokens.
- *
- *  Skips over comments and generates line and column numbers.
- *
- * @param output_tokens Receives a list of all tokens in the input data.
- * @param input_buffer Textual input buffer to be processed, 0-terminated.
- * @throw DeadlyImportError if something goes wrong */
-void Tokenize(TokenList& output_tokens, const char* input);
-
-
-/** Tokenizer function for binary FBX files.
- *
- *  Emits a token list suitable for direct parsing.
- *
- * @param output_tokens Receives a list of all tokens in the input data.
- * @param input_buffer Binary input buffer to be processed.
- * @param length Length of input buffer, in bytes. There is no 0-terminal.
- * @throw DeadlyImportError if something goes wrong */
-void TokenizeBinary(TokenList& output_tokens, const char* input, size_t length);
-
-
-} // ! FBX
-} // ! Assimp
-
-#endif // ! INCLUDED_AI_FBX_PARSER_H
diff --git a/libs/assimp/code/AssetLib/FBX/FBXUtil.cpp b/libs/assimp/code/AssetLib/FBX/FBXUtil.cpp
deleted file mode 100644
index ac465d6..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXUtil.cpp
+++ /dev/null
@@ -1,241 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXUtil.cpp
- *  @brief Implementation of internal FBX utility functions
- */
-
-#include "FBXUtil.h"
-#include "FBXTokenizer.h"
-
-#include <assimp/TinyFormatter.h>
-#include <string>
-#include <cstring>
-
-#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
-
-namespace Assimp {
-namespace FBX {
-namespace Util {
-
-// ------------------------------------------------------------------------------------------------
-const char* TokenTypeString(TokenType t)
-{
-    switch(t) {
-        case TokenType_OPEN_BRACKET:
-            return "TOK_OPEN_BRACKET";
-
-        case TokenType_CLOSE_BRACKET:
-            return "TOK_CLOSE_BRACKET";
-
-        case TokenType_DATA:
-            return "TOK_DATA";
-
-        case TokenType_COMMA:
-            return "TOK_COMMA";
-
-        case TokenType_KEY:
-            return "TOK_KEY";
-
-        case TokenType_BINARY_DATA:
-            return "TOK_BINARY_DATA";
-    }
-
-    ai_assert(false);
-    return "";
-}
-
-
-// ------------------------------------------------------------------------------------------------
-std::string GetOffsetText(size_t offset)
-{
-    return static_cast<std::string>( Formatter::format() << " (offset 0x" << std::hex << offset << ") " );
-}
-
-// ------------------------------------------------------------------------------------------------
-std::string GetLineAndColumnText(unsigned int line, unsigned int column)
-{
-    return static_cast<std::string>( Formatter::format() << " (line " << line << " <<  col " << column << ") " );
-}
-
-// ------------------------------------------------------------------------------------------------
-std::string GetTokenText(const Token* tok)
-{
-    if(tok->IsBinary()) {
-        return static_cast<std::string>( Formatter::format() <<
-            " (" << TokenTypeString(tok->Type()) <<
-            ", offset 0x" << std::hex << tok->Offset() << ") " );
-    }
-
-    return static_cast<std::string>( Formatter::format() <<
-        " (" << TokenTypeString(tok->Type()) <<
-        ", line " << tok->Line() <<
-        ", col " << tok->Column() << ") " );
-}
-
-// Generated by this formula: T["ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[i]] = i;
-static const uint8_t base64DecodeTable[128] = {
-    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
-    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
-    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
-    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255,
-    255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
-    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
-    255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
-    41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255
-};
-
-uint8_t DecodeBase64(char ch)
-{
-    const auto idx = static_cast<uint8_t>(ch);
-    if (idx > 127)
-        return 255;
-    return base64DecodeTable[idx];
-}
-
-size_t ComputeDecodedSizeBase64(const char* in, size_t inLength)
-{
-    if (inLength < 2)
-    {
-        return 0;
-    }
-    const size_t equals = size_t(in[inLength - 1] == '=') + size_t(in[inLength - 2] == '=');
-    const size_t full_length = (inLength * 3) >> 2; // div by 4
-    if (full_length < equals)
-    {
-        return 0;
-    }
-    return full_length - equals;
-}
-
-size_t DecodeBase64(const char* in, size_t inLength, uint8_t* out, size_t maxOutLength)
-{
-    if (maxOutLength == 0 || inLength < 2) {
-        return 0;
-    }
-    const size_t realLength = inLength - size_t(in[inLength - 1] == '=') - size_t(in[inLength - 2] == '=');
-    size_t dst_offset = 0;
-    int val = 0, valb = -8;
-    for (size_t src_offset = 0; src_offset < realLength; ++src_offset)
-    {
-        const uint8_t table_value = Util::DecodeBase64(in[src_offset]);
-        if (table_value == 255)
-        {
-            return 0;
-        }
-        val = (val << 6) + table_value;
-        valb += 6;
-        if (valb >= 0)
-        {
-            out[dst_offset++] = static_cast<uint8_t>((val >> valb) & 0xFF);
-            valb -= 8;
-            val &= 0xFFF;
-        }
-    }
-    return dst_offset;
-}
-
-static const char to_base64_string[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-char EncodeBase64(char byte)
-{
-    return to_base64_string[(size_t)byte];
-}
-
-/** Encodes a block of 4 bytes to base64 encoding
-*
-*  @param bytes Bytes to encode.
-*  @param out_string String to write encoded values to.
-*  @param string_pos Position in out_string.*/
-void EncodeByteBlock(const char* bytes, std::string& out_string, size_t string_pos)
-{
-    char b0 = (bytes[0] & 0xFC) >> 2;
-    char b1 = (bytes[0] & 0x03) << 4 | ((bytes[1] & 0xF0) >> 4);
-    char b2 = (bytes[1] & 0x0F) << 2 | ((bytes[2] & 0xC0) >> 6);
-    char b3 = (bytes[2] & 0x3F);
-
-    out_string[string_pos + 0] = EncodeBase64(b0);
-    out_string[string_pos + 1] = EncodeBase64(b1);
-    out_string[string_pos + 2] = EncodeBase64(b2);
-    out_string[string_pos + 3] = EncodeBase64(b3);
-}
-
-std::string EncodeBase64(const char* data, size_t length)
-{
-    // calculate extra bytes needed to get a multiple of 3
-    size_t extraBytes = 3 - length % 3;
-
-    // number of base64 bytes
-    size_t encodedBytes = 4 * (length + extraBytes) / 3;
-
-    std::string encoded_string(encodedBytes, '=');
-
-    // read blocks of 3 bytes
-    for (size_t ib3 = 0; ib3 < length / 3; ib3++)
-    {
-        const size_t iByte = ib3 * 3;
-        const size_t iEncodedByte = ib3 * 4;
-        const char* currData = &data[iByte];
-
-        EncodeByteBlock(currData, encoded_string, iEncodedByte);
-    }
-
-    // if size of data is not a multiple of 3, also encode the final bytes (and add zeros where needed)
-    if (extraBytes > 0)
-    {
-        char finalBytes[4] = { 0,0,0,0 };
-        memcpy(&finalBytes[0], &data[length - length % 3], length % 3);
-
-        const size_t iEncodedByte = encodedBytes - 4;
-        EncodeByteBlock(&finalBytes[0], encoded_string, iEncodedByte);
-
-        // add '=' at the end
-        for (size_t i = 0; i < 4 * extraBytes / 3; i++)
-            encoded_string[encodedBytes - i - 1] = '=';
-    }
-    return encoded_string;
-}
-
-} // !Util
-} // !FBX
-} // !Assimp
-
-#endif
diff --git a/libs/assimp/code/AssetLib/FBX/FBXUtil.h b/libs/assimp/code/AssetLib/FBX/FBXUtil.h
deleted file mode 100644
index 0e0bb75..0000000
--- a/libs/assimp/code/AssetLib/FBX/FBXUtil.h
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
-Open Asset Import Library (assimp)
-----------------------------------------------------------------------
-
-Copyright (c) 2006-2022, assimp team
-
-
-All rights reserved.
-
-Redistribution and use of this software in source and binary forms,
-with or without modification, are permitted provided that the
-following conditions are met:
-
-* Redistributions of source code must retain the above
-  copyright notice, this list of conditions and the
-  following disclaimer.
-
-* Redistributions in binary form must reproduce the above
-  copyright notice, this list of conditions and the
-  following disclaimer in the documentation and/or other
-  materials provided with the distribution.
-
-* Neither the name of the assimp team, nor the names of its
-  contributors may be used to endorse or promote products
-  derived from this software without specific prior
-  written permission of the assimp team.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-----------------------------------------------------------------------
-*/
-
-/** @file  FBXUtil.h
- *  @brief FBX utility functions for internal use
- */
-#ifndef INCLUDED_AI_FBX_UTIL_H
-#define INCLUDED_AI_FBX_UTIL_H
-
-#include "FBXCompileConfig.h"
-#include "FBXTokenizer.h"
-#include <stdint.h>
-
-namespace Assimp {
-namespace FBX {
-
-
-namespace Util {
-
-
-/** helper for std::for_each to delete all heap-allocated items in a container */
-template<typename T>
-struct delete_fun
-{
-    void operator()(const volatile T* del) {
-        delete del;
-    }
-};
-
-/** Get a string representation for a #TokenType. */
-const char* TokenTypeString(TokenType t);
-
-
-
-/** Format log/error messages using a given offset in the source binary file
- *
- *  @param offset offset within the file
- *  @return A string of the following format: " (offset 0x{offset}) "*/
-std::string GetOffsetText(size_t offset);
-
-
-/** Format log/error messages using a given line location in the source file.
- *
- *  @param line Line index, 1-based
- *  @param column Column index, 1-based
- *  @return A string of the following format: " (line {line}, col {column}) "*/
-std::string GetLineAndColumnText(unsigned int line, unsigned int column);
-
-
-/** Format log/error messages using a given cursor token.
- *
- *  @param tok Token where parsing/processing stopped
- *  @return A string of the following format: " ({token-type}, line {line}, col {column}) "*/
-std::string GetTokenText(const Token* tok);
-
-/** Decode a single Base64-encoded character.
-*
-*  @param ch Character to decode (from base64 to binary).
-*  @return decoded byte value*/
-uint8_t DecodeBase64(char ch);
-
-/** Compute decoded size of a Base64-encoded string
-*
-*  @param in Characters to decode.
-*  @param inLength Number of characters to decode.
-*  @return size of the decoded data (number of bytes)*/
-size_t ComputeDecodedSizeBase64(const char* in, size_t inLength);
-
-/** Decode a Base64-encoded string
-*
-*  @param in Characters to decode.
-*  @param inLength Number of characters to decode.
-*  @param out Pointer where we will store the decoded data.
-*  @param maxOutLength Size of output buffer.
-*  @return size of the decoded data (number of bytes)*/
-size_t DecodeBase64(const char* in, size_t inLength, uint8_t* out, size_t maxOutLength);
-
-char EncodeBase64(char byte);
-
-/** Encode bytes in base64-encoding
-*
-*  @param data Binary data to encode.
-*  @param inLength Number of bytes to encode.
-*  @return base64-encoded string*/
-std::string EncodeBase64(const char* data, size_t length);
-
-}
-}
-}
-
-#endif // ! INCLUDED_AI_FBX_UTIL_H