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diff --git a/src/mesh/assimp-master/code/AssetLib/FBX/FBXExportNode.cpp b/src/mesh/assimp-master/code/AssetLib/FBX/FBXExportNode.cpp
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+++ b/src/mesh/assimp-master/code/AssetLib/FBX/FBXExportNode.cpp
@@ -0,0 +1,561 @@
+/*
+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
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