switch to tinyobj and nanovg from assimp and cairo

8 files changed, 0 insertions, 7844 deletions

diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2Asset.h b/libs/assimp/code/AssetLib/glTF2/glTF2Asset.h
deleted file mode 100644
index c597fc9..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2Asset.h
+++ /dev/null
@@ -1,1242 +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 glTFAsset.h
- * Declares a glTF class to handle gltf/glb files
- *
- * glTF Extensions Support:
- *   KHR_materials_pbrSpecularGlossiness full
- *   KHR_materials_unlit full
- *   KHR_lights_punctual full
- *   KHR_materials_sheen full
- *   KHR_materials_clearcoat full
- *   KHR_materials_transmission full
- *   KHR_materials_volume full
- *   KHR_materials_ior full
- */
-#ifndef GLTF2ASSET_H_INC
-#define GLTF2ASSET_H_INC
-
-#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
-
-#include <assimp/Exceptional.h>
-
-#include <algorithm>
-#include <list>
-#include <map>
-#include <set>
-#include <stdexcept>
-#include <string>
-#include <vector>
-
-// clang-format off
-#if (__GNUC__ == 8 && __GNUC_MINOR__ >= 0)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wclass-memaccess"
-#endif
-
-#include <rapidjson/document.h>
-#include <rapidjson/error/en.h>
-#include <rapidjson/rapidjson.h>
-#include <rapidjson/schema.h>
-
-#if (__GNUC__ == 8 && __GNUC_MINOR__ >= 0)
-#   pragma GCC diagnostic pop
-#endif
-
-#ifdef ASSIMP_API
-#   include <assimp/ByteSwapper.h>
-#   include <assimp/DefaultIOSystem.h>
-#   include <memory>
-#else
-#   include <memory>
-#   define AI_SWAP4(p)
-#   define ai_assert
-#endif
-
-#if _MSC_VER > 1500 || (defined __GNUC___)
-#   define ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
-#else
-#   define gltf_unordered_map map
-#   define gltf_unordered_set set
-#endif
-
-#ifdef ASSIMP_GLTF_USE_UNORDERED_MULTIMAP
-#   include <unordered_map>
-#   include <unordered_set>
-#   if defined(_MSC_VER) && _MSC_VER <= 1600
-#       define gltf_unordered_map tr1::unordered_map
-#       define gltf_unordered_set tr1::unordered_set
-#   else
-#       define gltf_unordered_map unordered_map
-#       define gltf_unordered_set unordered_set
-#   endif
-#endif
-// clang-format on
-
-#include <assimp/StringUtils.h>
-#include <assimp/material.h>
-#include <assimp/GltfMaterial.h>
-
-#include "AssetLib/glTF/glTFCommon.h"
-
-namespace glTF2 {
-
-using glTFCommon::Nullable;
-using glTFCommon::Ref;
-using glTFCommon::IOStream;
-using glTFCommon::IOSystem;
-using glTFCommon::shared_ptr;
-
-using rapidjson::Document;
-using rapidjson::Value;
-
-class Asset;
-class AssetWriter;
-
-struct BufferView; // here due to cross-reference
-struct Texture;
-struct Skin;
-
-using glTFCommon::mat4;
-using glTFCommon::vec3;
-using glTFCommon::vec4;
-
-//! Magic number for GLB files
-#define AI_GLB_MAGIC_NUMBER "glTF"
-
-#ifdef ASSIMP_API
-#include <assimp/Compiler/pushpack1.h>
-#endif
-
-//! For binary .glb files
-//! 12-byte header (+ the JSON + a "body" data section)
-struct GLB_Header {
-    uint8_t magic[4]; //!< Magic number: "glTF"
-    uint32_t version; //!< Version number (always 2 as of the last update)
-    uint32_t length; //!< Total length of the Binary glTF, including header, scene, and body, in bytes
-} PACK_STRUCT;
-
-struct GLB_Chunk {
-    uint32_t chunkLength;
-    uint32_t chunkType;
-} PACK_STRUCT;
-
-#ifdef ASSIMP_API
-#include <assimp/Compiler/poppack1.h>
-#endif
-
-//! Values for the GLB_Chunk::chunkType field
-enum ChunkType {
-    ChunkType_JSON = 0x4E4F534A,
-    ChunkType_BIN = 0x004E4942
-};
-
-//! Values for the mesh primitive modes
-enum PrimitiveMode {
-    PrimitiveMode_POINTS = 0,
-    PrimitiveMode_LINES = 1,
-    PrimitiveMode_LINE_LOOP = 2,
-    PrimitiveMode_LINE_STRIP = 3,
-    PrimitiveMode_TRIANGLES = 4,
-    PrimitiveMode_TRIANGLE_STRIP = 5,
-    PrimitiveMode_TRIANGLE_FAN = 6
-};
-
-//! Values for the Accessor::componentType field
-enum ComponentType {
-    ComponentType_BYTE = 5120,
-    ComponentType_UNSIGNED_BYTE = 5121,
-    ComponentType_SHORT = 5122,
-    ComponentType_UNSIGNED_SHORT = 5123,
-    ComponentType_UNSIGNED_INT = 5125,
-    ComponentType_FLOAT = 5126
-};
-
-inline unsigned int ComponentTypeSize(ComponentType t) {
-    switch (t) {
-    case ComponentType_SHORT:
-    case ComponentType_UNSIGNED_SHORT:
-        return 2;
-
-    case ComponentType_UNSIGNED_INT:
-    case ComponentType_FLOAT:
-        return 4;
-
-    case ComponentType_BYTE:
-    case ComponentType_UNSIGNED_BYTE:
-        return 1;
-    default:
-        throw DeadlyImportError("GLTF: Unsupported Component Type ", ai_to_string(t));
-    }
-}
-
-//! Values for the BufferView::target field
-enum BufferViewTarget {
-    BufferViewTarget_NONE = 0,
-    BufferViewTarget_ARRAY_BUFFER = 34962,
-    BufferViewTarget_ELEMENT_ARRAY_BUFFER = 34963
-};
-
-//! Values for the Sampler::magFilter field
-enum class SamplerMagFilter : unsigned int {
-    UNSET = 0,
-    SamplerMagFilter_Nearest = 9728,
-    SamplerMagFilter_Linear = 9729
-};
-
-//! Values for the Sampler::minFilter field
-enum class SamplerMinFilter : unsigned int {
-    UNSET = 0,
-    SamplerMinFilter_Nearest = 9728,
-    SamplerMinFilter_Linear = 9729,
-    SamplerMinFilter_Nearest_Mipmap_Nearest = 9984,
-    SamplerMinFilter_Linear_Mipmap_Nearest = 9985,
-    SamplerMinFilter_Nearest_Mipmap_Linear = 9986,
-    SamplerMinFilter_Linear_Mipmap_Linear = 9987
-};
-
-//! Values for the Sampler::wrapS and Sampler::wrapT field
-enum class SamplerWrap : unsigned int {
-    UNSET = 0,
-    Clamp_To_Edge = 33071,
-    Mirrored_Repeat = 33648,
-    Repeat = 10497
-};
-
-//! Values for the Texture::format and Texture::internalFormat fields
-enum TextureFormat {
-    TextureFormat_ALPHA = 6406,
-    TextureFormat_RGB = 6407,
-    TextureFormat_RGBA = 6408,
-    TextureFormat_LUMINANCE = 6409,
-    TextureFormat_LUMINANCE_ALPHA = 6410
-};
-
-//! Values for the Texture::target field
-enum TextureTarget {
-    TextureTarget_TEXTURE_2D = 3553
-};
-
-//! Values for the Texture::type field
-enum TextureType {
-    TextureType_UNSIGNED_BYTE = 5121,
-    TextureType_UNSIGNED_SHORT_5_6_5 = 33635,
-    TextureType_UNSIGNED_SHORT_4_4_4_4 = 32819,
-    TextureType_UNSIGNED_SHORT_5_5_5_1 = 32820
-};
-
-//! Values for the Animation::Target::path field
-enum AnimationPath {
-    AnimationPath_TRANSLATION,
-    AnimationPath_ROTATION,
-    AnimationPath_SCALE,
-    AnimationPath_WEIGHTS,
-};
-
-//! Values for the Animation::Sampler::interpolation field
-enum Interpolation {
-    Interpolation_LINEAR,
-    Interpolation_STEP,
-    Interpolation_CUBICSPLINE,
-};
-
-//! Values for the Accessor::type field (helper class)
-class AttribType {
-public:
-    enum Value { SCALAR,
-        VEC2,
-        VEC3,
-        VEC4,
-        MAT2,
-        MAT3,
-        MAT4 };
-
-private:
-    static const size_t NUM_VALUES = static_cast<size_t>(MAT4) + 1;
-
-    struct Info {
-        const char *name;
-        unsigned int numComponents;
-    };
-
-    template <int N>
-    struct data { static const Info infos[NUM_VALUES]; };
-
-public:
-    inline static Value FromString(const char *str) {
-        for (size_t i = 0; i < NUM_VALUES; ++i) {
-            if (strcmp(data<0>::infos[i].name, str) == 0) {
-                return static_cast<Value>(i);
-            }
-        }
-        return SCALAR;
-    }
-
-    inline static const char *ToString(Value type) {
-        return data<0>::infos[static_cast<size_t>(type)].name;
-    }
-
-    inline static unsigned int GetNumComponents(Value type) {
-        return data<0>::infos[static_cast<size_t>(type)].numComponents;
-    }
-};
-
-// must match the order of the AttribTypeTraits::Value enum!
-template <int N>
-const AttribType::Info
-        AttribType::data<N>::infos[AttribType::NUM_VALUES] = {
-            { "SCALAR", 1 }, { "VEC2", 2 }, { "VEC3", 3 }, { "VEC4", 4 }, { "MAT2", 4 }, { "MAT3", 9 }, { "MAT4", 16 }
-        };
-
-
-struct CustomExtension {
-
-    //
-    // A struct containing custom extension data added to a glTF2 file
-    // Has to contain Object, Array, String, Double, Uint64, and Int64 at a minimum
-    // String, Double, Uint64, and Int64 are stored in the Nullables
-    // Object and Array are stored in the std::vector
-    //
-    std::string name;
-
-    Nullable<std::string> mStringValue;
-    Nullable<double> mDoubleValue;
-    Nullable<uint64_t> mUint64Value;
-    Nullable<int64_t> mInt64Value;
-    Nullable<bool> mBoolValue;
-
-    // std::vector<CustomExtension> handles both Object and Array
-    Nullable<std::vector<CustomExtension>> mValues;
-
-    operator bool() const {
-        return Size() != 0;
-    }
-
-    size_t Size() const {
-        if (mValues.isPresent) {
-            return mValues.value.size();
-        } else if (mStringValue.isPresent || mDoubleValue.isPresent || mUint64Value.isPresent || mInt64Value.isPresent || mBoolValue.isPresent) {
-            return 1;
-        }
-        return 0;
-    }
-
-    CustomExtension() = default;
-
-    ~CustomExtension() = default;
-
-    CustomExtension(const CustomExtension &other) :
-            name(other.name),
-            mStringValue(other.mStringValue),
-            mDoubleValue(other.mDoubleValue),
-            mUint64Value(other.mUint64Value),
-            mInt64Value(other.mInt64Value),
-            mBoolValue(other.mBoolValue),
-            mValues(other.mValues) {
-        // empty
-    }
-};
-
-//! Base class for all glTF top-level objects
-struct Object {
-    int index; //!< The index of this object within its property container
-    int oIndex; //!< The original index of this object defined in the JSON
-    std::string id; //!< The globally unique ID used to reference this object
-    std::string name; //!< The user-defined name of this object
-
-    CustomExtension customExtensions;
-    CustomExtension extras;
-
-    //! Objects marked as special are not exported (used to emulate the binary body buffer)
-    virtual bool IsSpecial() const { return false; }
-
-    virtual ~Object() {}
-
-    //! Maps special IDs to another ID, where needed. Subclasses may override it (statically)
-    static const char *TranslateId(Asset & /*r*/, const char *id) { return id; }
-
-    inline Value *FindString(Value &val, const char *id);
-    inline Value *FindNumber(Value &val, const char *id);
-    inline Value *FindUInt(Value &val, const char *id);
-    inline Value *FindArray(Value &val, const char *id);
-    inline Value *FindObject(Value &val, const char *id);
-    inline Value *FindExtension(Value &val, const char *extensionId);
-
-    inline void ReadExtensions(Value &val);
-    inline void ReadExtras(Value &val);
-};
-
-//
-// Classes for each glTF top-level object type
-//
-
-//! A buffer points to binary geometry, animation, or skins.
-struct Buffer : public Object {
-    /********************* Types *********************/
-public:
-    enum Type {
-        Type_arraybuffer,
-        Type_text
-    };
-
-    /// \struct SEncodedRegion
-    /// Descriptor of encoded region in "bufferView".
-    struct SEncodedRegion {
-        const size_t Offset; ///< Offset from begin of "bufferView" to encoded region, in bytes.
-        const size_t EncodedData_Length; ///< Size of encoded region, in bytes.
-        uint8_t *const DecodedData; ///< Cached encoded data.
-        const size_t DecodedData_Length; ///< Size of decoded region, in bytes.
-        const std::string ID; ///< ID of the region.
-
-        /// \fn SEncodedRegion(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string pID)
-        /// Constructor.
-        /// \param [in] pOffset - offset from begin of "bufferView" to encoded region, in bytes.
-        /// \param [in] pEncodedData_Length - size of encoded region, in bytes.
-        /// \param [in] pDecodedData - pointer to decoded data array.
-        /// \param [in] pDecodedData_Length - size of encoded region, in bytes.
-        /// \param [in] pID - ID of the region.
-        SEncodedRegion(const size_t pOffset, const size_t pEncodedData_Length, uint8_t *pDecodedData, const size_t pDecodedData_Length, const std::string &pID) :
-                Offset(pOffset),
-                EncodedData_Length(pEncodedData_Length),
-                DecodedData(pDecodedData),
-                DecodedData_Length(pDecodedData_Length),
-                ID(pID) {}
-
-        /// \fn ~SEncodedRegion()
-        /// Destructor.
-        ~SEncodedRegion() { delete[] DecodedData; }
-    };
-
-    /******************* Variables *******************/
-
-    //std::string uri; //!< The uri of the buffer. Can be a filepath, a data uri, etc. (required)
-    size_t byteLength; //!< The length of the buffer in bytes. (default: 0)
-    //std::string type; //!< XMLHttpRequest responseType (default: "arraybuffer")
-    size_t capacity = 0; //!< The capacity of the buffer in bytes. (default: 0)
-
-    Type type;
-
-    /// \var EncodedRegion_Current
-    /// Pointer to currently active encoded region.
-    /// Why not decoding all regions at once and not to set one buffer with decoded data?
-    /// Yes, why not? Even "accessor" point to decoded data. I mean that fields "byteOffset", "byteStride" and "count" has values which describes decoded
-    /// data array. But only in range of mesh while is active parameters from "compressedData". For another mesh accessors point to decoded data too. But
-    /// offset is counted for another regions is encoded.
-    /// Example. You have two meshes. For every of it you have 4 bytes of data. That data compressed to 2 bytes. So, you have buffer with encoded data:
-    /// M1_E0, M1_E1, M2_E0, M2_E1.
-    /// After decoding you'll get:
-    /// M1_D0, M1_D1, M1_D2, M1_D3, M2_D0, M2_D1, M2_D2, M2_D3.
-    /// "accessors" must to use values that point to decoded data - obviously. So, you'll expect "accessors" like
-    /// "accessor_0" : { byteOffset: 0, byteLength: 4}, "accessor_1" : { byteOffset: 4, byteLength: 4}
-    /// but in real life you'll get:
-    /// "accessor_0" : { byteOffset: 0, byteLength: 4}, "accessor_1" : { byteOffset: 2, byteLength: 4}
-    /// Yes, accessor of next mesh has offset and length which mean: current mesh data is decoded, all other data is encoded.
-    /// And when before you start to read data of current mesh (with encoded data of course) you must decode region of "bufferView", after read finished
-    /// delete encoding mark. And after that you can repeat process: decode data of mesh, read, delete decoded data.
-    ///
-    /// Remark. Encoding all data at once is good in world with computers which do not has RAM limitation. So, you must use step by step encoding in
-    /// exporter and importer. And, thanks to such way, there is no need to load whole file into memory.
-    SEncodedRegion *EncodedRegion_Current;
-
-private:
-    shared_ptr<uint8_t> mData; //!< Pointer to the data
-    bool mIsSpecial; //!< Set to true for special cases (e.g. the body buffer)
-
-    /// \var EncodedRegion_List
-    /// List of encoded regions.
-    std::list<SEncodedRegion *> EncodedRegion_List;
-
-    /******************* Functions *******************/
-
-public:
-    Buffer();
-    ~Buffer();
-
-    void Read(Value &obj, Asset &r);
-
-    bool LoadFromStream(IOStream &stream, size_t length = 0, size_t baseOffset = 0);
-
-    /// \fn void EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t* pDecodedData, const size_t pDecodedData_Length, const std::string& pID)
-    /// Mark region of "bufferView" as encoded. When data is request from such region then "bufferView" use decoded data.
-    /// \param [in] pOffset - offset from begin of "bufferView" to encoded region, in bytes.
-    /// \param [in] pEncodedData_Length - size of encoded region, in bytes.
-    /// \param [in] pDecodedData - pointer to decoded data array.
-    /// \param [in] pDecodedData_Length - size of encoded region, in bytes.
-    /// \param [in] pID - ID of the region.
-    void EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t *pDecodedData, const size_t pDecodedData_Length, const std::string &pID);
-
-    /// \fn void EncodedRegion_SetCurrent(const std::string& pID)
-    /// Select current encoded region by ID. \sa EncodedRegion_Current.
-    /// \param [in] pID - ID of the region.
-    void EncodedRegion_SetCurrent(const std::string &pID);
-
-    /// \fn bool ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t* pReplace_Data, const size_t pReplace_Count)
-    /// Replace part of buffer data. Pay attention that function work with original array of data (\ref mData) not with encoded regions.
-    /// \param [in] pBufferData_Offset - index of first element in buffer from which new data will be placed.
-    /// \param [in] pBufferData_Count - count of bytes in buffer which will be replaced.
-    /// \param [in] pReplace_Data - pointer to array with new data for buffer.
-    /// \param [in] pReplace_Count - count of bytes in new data.
-    /// \return true - if successfully replaced, false if input arguments is out of range.
-    bool ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t *pReplace_Data, const size_t pReplace_Count);
-    bool ReplaceData_joint(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t *pReplace_Data, const size_t pReplace_Count);
-
-    size_t AppendData(uint8_t *data, size_t length);
-    void Grow(size_t amount);
-
-    uint8_t *GetPointer() { return mData.get(); }
-
-    void MarkAsSpecial() { mIsSpecial = true; }
-
-    bool IsSpecial() const override { return mIsSpecial; }
-
-    std::string GetURI() { return std::string(this->id) + ".bin"; }
-
-    static const char *TranslateId(Asset &r, const char *id);
-};
-
-//! A view into a buffer generally representing a subset of the buffer.
-struct BufferView : public Object {
-    Ref<Buffer> buffer; //! The ID of the buffer. (required)
-    size_t byteOffset; //! The offset into the buffer in bytes. (required)
-    size_t byteLength; //! The length of the bufferView in bytes. (default: 0)
-    unsigned int byteStride; //!< The stride, in bytes, between attributes referenced by this accessor. (default: 0)
-
-    BufferViewTarget target; //! The target that the WebGL buffer should be bound to.
-
-    void Read(Value &obj, Asset &r);
-    uint8_t *GetPointer(size_t accOffset);
-};
-
-//! A typed view into a BufferView. A BufferView contains raw binary data.
-//! An accessor provides a typed view into a BufferView or a subset of a BufferView
-//! similar to how WebGL's vertexAttribPointer() defines an attribute in a buffer.
-struct Accessor : public Object {
-    struct Sparse;
-
-    Ref<BufferView> bufferView; //!< The ID of the bufferView. (required)
-    size_t byteOffset; //!< The offset relative to the start of the bufferView in bytes. (required)
-    ComponentType componentType; //!< The datatype of components in the attribute. (required)
-    size_t count; //!< The number of attributes referenced by this accessor. (required)
-    AttribType::Value type; //!< Specifies if the attribute is a scalar, vector, or matrix. (required)
-    std::vector<double> max; //!< Maximum value of each component in this attribute.
-    std::vector<double> min; //!< Minimum value of each component in this attribute.
-    std::unique_ptr<Sparse> sparse;
-    std::unique_ptr<Buffer> decodedBuffer; // Packed decoded data, returned instead of original bufferView if present
-
-    unsigned int GetNumComponents();
-    unsigned int GetBytesPerComponent();
-    unsigned int GetElementSize();
-
-    inline uint8_t *GetPointer();
-    inline size_t GetStride();
-    inline size_t GetMaxByteSize();
-
-    template <class T>
-    void ExtractData(T *&outData);
-
-    void WriteData(size_t count, const void *src_buffer, size_t src_stride);
-    void WriteSparseValues(size_t count, const void *src_data, size_t src_dataStride);
-    void WriteSparseIndices(size_t count, const void *src_idx, size_t src_idxStride);
-
-    //! Helper class to iterate the data
-    class Indexer {
-        friend struct Accessor;
-
-        // This field is reported as not used, making it protectd is the easiest way to work around it without going to the bottom of what the problem is:
-        // ../code/glTF2/glTF2Asset.h:392:19: error: private field 'accessor' is not used [-Werror,-Wunused-private-field]
-    protected:
-        Accessor &accessor;
-
-    private:
-        uint8_t *data;
-        size_t elemSize, stride;
-
-        Indexer(Accessor &acc);
-
-    public:
-        //! Accesses the i-th value as defined by the accessor
-        template <class T>
-        T GetValue(int i);
-
-        //! Accesses the i-th value as defined by the accessor
-        inline unsigned int GetUInt(int i) {
-            return GetValue<unsigned int>(i);
-        }
-
-        inline bool IsValid() const {
-            return data != nullptr;
-        }
-    };
-
-    inline Indexer GetIndexer() {
-        return Indexer(*this);
-    }
-
-    Accessor() {}
-    void Read(Value &obj, Asset &r);
-
-    //sparse
-    struct Sparse {
-        size_t count;
-        ComponentType indicesType;
-        Ref<BufferView> indices;
-        size_t indicesByteOffset;
-        Ref<BufferView> values;
-        size_t valuesByteOffset;
-
-        std::vector<uint8_t> data; //!< Actual data, which may be defaulted to an array of zeros or the original data, with the sparse buffer view applied on top of it.
-
-        void PopulateData(size_t numBytes, uint8_t *bytes);
-        void PatchData(unsigned int elementSize);
-    };
-};
-
-struct Camera : public Object {
-    enum Type {
-        Perspective,
-        Orthographic
-    };
-
-    Type type;
-
-    union {
-        struct {
-            float aspectRatio; //!<The floating - point aspect ratio of the field of view. (0 = undefined = use the canvas one)
-            float yfov; //!<The floating - point vertical field of view in radians. (required)
-            float zfar; //!<The floating - point distance to the far clipping plane. (required)
-            float znear; //!< The floating - point distance to the near clipping plane. (required)
-        } perspective;
-
-        struct {
-            float xmag; //! The floating-point horizontal magnification of the view. (required)
-            float ymag; //! The floating-point vertical magnification of the view. (required)
-            float zfar; //! The floating-point distance to the far clipping plane. (required)
-            float znear; //! The floating-point distance to the near clipping plane. (required)
-        } ortographic;
-    } cameraProperties;
-
-    Camera() :
-            type(Perspective),
-            cameraProperties() {
-        // empty
-    }
-    void Read(Value &obj, Asset &r);
-};
-
-//! A light (from KHR_lights_punctual extension)
-struct Light : public Object {
-    enum Type {
-        Directional,
-        Point,
-        Spot
-    };
-
-    Type type;
-
-    vec3 color;
-    float intensity;
-    Nullable<float> range;
-
-    float innerConeAngle;
-    float outerConeAngle;
-
-    Light() {}
-    void Read(Value &obj, Asset &r);
-};
-
-//! Image data used to create a texture.
-struct Image : public Object {
-    std::string uri; //! The uri of the image, that can be a file path, a data URI, etc.. (required)
-
-    Ref<BufferView> bufferView;
-
-    std::string mimeType;
-
-    int width, height;
-
-private:
-    std::unique_ptr<uint8_t[]> mData;
-    size_t mDataLength;
-
-public:
-    Image();
-    void Read(Value &obj, Asset &r);
-
-    inline bool HasData() const { return mDataLength > 0; }
-
-    inline size_t GetDataLength() const { return mDataLength; }
-
-    inline const uint8_t *GetData() const { return mData.get(); }
-
-    inline uint8_t *StealData();
-
-    inline void SetData(uint8_t *data, size_t length, Asset &r);
-};
-
-const vec4 defaultBaseColor = { 1, 1, 1, 1 };
-const vec3 defaultEmissiveFactor = { 0, 0, 0 };
-const vec4 defaultDiffuseFactor = { 1, 1, 1, 1 };
-const vec3 defaultSpecularFactor = { 1, 1, 1 };
-const vec3 defaultSheenFactor = { 0, 0, 0 };
-const vec3 defaultAttenuationColor = { 1, 1, 1 };
-
-struct TextureInfo {
-    Ref<Texture> texture;
-    unsigned int index;
-    unsigned int texCoord = 0;
-
-    bool textureTransformSupported = false;
-    struct TextureTransformExt {
-        float offset[2];
-        float rotation;
-        float scale[2];
-    } TextureTransformExt_t;
-};
-
-struct NormalTextureInfo : TextureInfo {
-    float scale = 1;
-};
-
-struct OcclusionTextureInfo : TextureInfo {
-    float strength = 1;
-};
-
-struct PbrMetallicRoughness {
-    vec4 baseColorFactor;
-    TextureInfo baseColorTexture;
-    TextureInfo metallicRoughnessTexture;
-    float metallicFactor;
-    float roughnessFactor;
-};
-
-struct PbrSpecularGlossiness {
-    vec4 diffuseFactor;
-    vec3 specularFactor;
-    float glossinessFactor;
-    TextureInfo diffuseTexture;
-    TextureInfo specularGlossinessTexture;
-
-    PbrSpecularGlossiness() { SetDefaults(); }
-    void SetDefaults();
-};
-
-struct MaterialSheen {
-    vec3 sheenColorFactor;
-    float sheenRoughnessFactor;
-    TextureInfo sheenColorTexture;
-    TextureInfo sheenRoughnessTexture;
-
-    MaterialSheen() { SetDefaults(); }
-    void SetDefaults();
-};
-
-struct MaterialClearcoat {
-    float clearcoatFactor = 0.f;
-    float clearcoatRoughnessFactor = 0.f;
-    TextureInfo clearcoatTexture;
-    TextureInfo clearcoatRoughnessTexture;
-    NormalTextureInfo clearcoatNormalTexture;
-};
-
-struct MaterialTransmission {
-    TextureInfo transmissionTexture;
-    float transmissionFactor = 0.f;
-};
-
-struct MaterialVolume {
-    float thicknessFactor = 0.f;
-    TextureInfo thicknessTexture;
-    float attenuationDistance = 0.f;
-    vec3 attenuationColor;
-
-    MaterialVolume() { SetDefaults(); }
-    void SetDefaults();
-};
-
-struct MaterialIOR {
-    float ior = 0.f;
-
-    MaterialIOR() { SetDefaults(); }
-    void SetDefaults();
-};
-
-//! The material appearance of a primitive.
-struct Material : public Object {
-    //PBR metallic roughness properties
-    PbrMetallicRoughness pbrMetallicRoughness;
-
-    //other basic material properties
-    NormalTextureInfo normalTexture;
-    OcclusionTextureInfo occlusionTexture;
-    TextureInfo emissiveTexture;
-    vec3 emissiveFactor;
-    std::string alphaMode;
-    float alphaCutoff;
-    bool doubleSided;
-
-    //extension: KHR_materials_pbrSpecularGlossiness
-    Nullable<PbrSpecularGlossiness> pbrSpecularGlossiness;
-
-    //extension: KHR_materials_sheen
-    Nullable<MaterialSheen> materialSheen;
-
-    //extension: KHR_materials_clearcoat
-    Nullable<MaterialClearcoat> materialClearcoat;
-
-    //extension: KHR_materials_transmission
-    Nullable<MaterialTransmission> materialTransmission;
-
-    //extension: KHR_materials_volume
-    Nullable<MaterialVolume> materialVolume;
-
-    //extension: KHR_materials_ior
-    Nullable<MaterialIOR> materialIOR;
-    
-    //extension: KHR_materials_unlit
-    bool unlit;
-
-    Material() { SetDefaults(); }
-    void Read(Value &obj, Asset &r);
-    void SetDefaults();
-
-    inline void SetTextureProperties(Asset &r, Value *prop, TextureInfo &out);
-    inline void ReadTextureProperty(Asset &r, Value &vals, const char *propName, TextureInfo &out);
-    inline void ReadTextureProperty(Asset &r, Value &vals, const char *propName, NormalTextureInfo &out);
-    inline void ReadTextureProperty(Asset &r, Value &vals, const char *propName, OcclusionTextureInfo &out);
-};
-
-//! A set of primitives to be rendered. A node can contain one or more meshes. A node's transform places the mesh in the scene.
-struct Mesh : public Object {
-    using AccessorList = std::vector<Ref<Accessor>>;
-
-    struct Primitive {
-        PrimitiveMode mode;
-
-        struct Attributes {
-            AccessorList position, normal, tangent, texcoord, color, joint, jointmatrix, weight;
-        } attributes;
-
-        Ref<Accessor> indices;
-
-        Ref<Material> material;
-
-        struct Target {
-            AccessorList position, normal, tangent;
-        };
-        std::vector<Target> targets;
-
-        // extension: FB_ngon_encoding
-        bool ngonEncoded;
-
-        Primitive(): ngonEncoded(false) {}
-    };
-
-    std::vector<Primitive> primitives;
-
-    std::vector<float> weights;
-    std::vector<std::string> targetNames;
-
-    Mesh() {}
-
-    /// Get mesh data from JSON-object and place them to root asset.
-    /// \param [in] pJSON_Object - reference to pJSON-object from which data are read.
-    /// \param [out] pAsset_Root - reference to root asset where data will be stored.
-    void Read(Value &pJSON_Object, Asset &pAsset_Root);
-};
-
-struct Node : public Object {
-    std::vector<Ref<Node>> children;
-    std::vector<Ref<Mesh>> meshes;
-
-    Nullable<mat4> matrix;
-    Nullable<vec3> translation;
-    Nullable<vec4> rotation;
-    Nullable<vec3> scale;
-
-    Ref<Camera> camera;
-    Ref<Light> light;
-
-    std::vector<Ref<Node>> skeletons; //!< The ID of skeleton nodes. Each of which is the root of a node hierarchy.
-    Ref<Skin> skin; //!< The ID of the skin referenced by this node.
-    std::string jointName; //!< Name used when this node is a joint in a skin.
-
-    Ref<Node> parent; //!< This is not part of the glTF specification. Used as a helper.
-
-    Node() {}
-    void Read(Value &obj, Asset &r);
-};
-
-struct Program : public Object {
-    Program() {}
-    void Read(Value &obj, Asset &r);
-};
-
-struct Sampler : public Object {
-    SamplerMagFilter magFilter; //!< The texture magnification filter.
-    SamplerMinFilter minFilter; //!< The texture minification filter.
-    SamplerWrap wrapS; //!< The texture wrapping in the S direction.
-    SamplerWrap wrapT; //!< The texture wrapping in the T direction.
-
-    Sampler() { SetDefaults(); }
-    void Read(Value &obj, Asset &r);
-    void SetDefaults();
-};
-
-struct Scene : public Object {
-    std::string name;
-    std::vector<Ref<Node>> nodes;
-
-    Scene() {}
-    void Read(Value &obj, Asset &r);
-};
-
-struct Shader : public Object {
-    Shader() {}
-    void Read(Value &obj, Asset &r);
-};
-
-struct Skin : public Object {
-    Nullable<mat4> bindShapeMatrix; //!< Floating-point 4x4 transformation matrix stored in column-major order.
-    Ref<Accessor> inverseBindMatrices; //!< The ID of the accessor containing the floating-point 4x4 inverse-bind matrices.
-    std::vector<Ref<Node>> jointNames; //!< Joint names of the joints (nodes with a jointName property) in this skin.
-    std::string name; //!< The user-defined name of this object.
-
-    Skin() {}
-    void Read(Value &obj, Asset &r);
-};
-
-//! A texture and its sampler.
-struct Texture : public Object {
-    Ref<Sampler> sampler; //!< The ID of the sampler used by this texture. (required)
-    Ref<Image> source; //!< The ID of the image used by this texture. (required)
-
-    //TextureFormat format; //!< The texture's format. (default: TextureFormat_RGBA)
-    //TextureFormat internalFormat; //!< The texture's internal format. (default: TextureFormat_RGBA)
-
-    //TextureTarget target; //!< The target that the WebGL texture should be bound to. (default: TextureTarget_TEXTURE_2D)
-    //TextureType type; //!< Texel datatype. (default: TextureType_UNSIGNED_BYTE)
-
-    Texture() {}
-    void Read(Value &obj, Asset &r);
-};
-
-struct Animation : public Object {
-    struct Sampler {
-        Sampler() :
-                interpolation(Interpolation_LINEAR) {}
-
-        Ref<Accessor> input; //!< Accessor reference to the buffer storing the key-frame times.
-        Ref<Accessor> output; //!< Accessor reference to the buffer storing the key-frame values.
-        Interpolation interpolation; //!< Type of interpolation algorithm to use between key-frames.
-    };
-
-    struct Target {
-        Target() :
-                path(AnimationPath_TRANSLATION) {}
-
-        Ref<Node> node; //!< The node to animate.
-        AnimationPath path; //!< The property of the node to animate.
-    };
-
-    struct Channel {
-        Channel() :
-                sampler(-1) {}
-
-        int sampler; //!< The sampler index containing the animation data.
-        Target target; //!< The node and property to animate.
-    };
-
-    std::vector<Sampler> samplers; //!< All the key-frame data for this animation.
-    std::vector<Channel> channels; //!< Data to connect nodes to key-frames.
-
-    Animation() {}
-    void Read(Value &obj, Asset &r);
-};
-
-//! Base class for LazyDict that acts as an interface
-class LazyDictBase {
-public:
-    virtual ~LazyDictBase() {}
-
-    virtual void AttachToDocument(Document &doc) = 0;
-    virtual void DetachFromDocument() = 0;
-
-#if !defined(ASSIMP_BUILD_NO_EXPORT)
-    virtual void WriteObjects(AssetWriter &writer) = 0;
-#endif
-};
-
-template <class T>
-class LazyDict;
-
-//! (Implemented in glTFAssetWriter.h)
-template <class T>
-void WriteLazyDict(LazyDict<T> &d, AssetWriter &w);
-
-//! Manages lazy loading of the glTF top-level objects, and keeps a reference to them by ID
-//! It is the owner the loaded objects, so when it is destroyed it also deletes them
-template <class T>
-class LazyDict : public LazyDictBase {
-    friend class Asset;
-    friend class AssetWriter;
-
-    using Dict = typename std::gltf_unordered_map<unsigned int, unsigned int>;
-    using IdDict = typename std::gltf_unordered_map<std::string, unsigned int>;
-
-    std::vector<T *> mObjs; //! The read objects
-    Dict mObjsByOIndex; //! The read objects accessible by original index
-    IdDict mObjsById; //! The read objects accessible by id
-    const char *mDictId; //! ID of the dictionary object
-    const char *mExtId; //! ID of the extension defining the dictionary
-    Value *mDict; //! JSON dictionary object
-    Asset &mAsset; //! The asset instance
-
-    std::gltf_unordered_set<unsigned int> mRecursiveReferenceCheck; //! Used by Retrieve to prevent recursive lookups
-
-    void AttachToDocument(Document &doc);
-    void DetachFromDocument();
-
-#if !defined(ASSIMP_BUILD_NO_EXPORT)
-    void WriteObjects(AssetWriter &writer) { WriteLazyDict<T>(*this, writer); }
-#endif
-
-    Ref<T> Add(T *obj);
-
-public:
-    LazyDict(Asset &asset, const char *dictId, const char *extId = 0);
-    ~LazyDict();
-
-    Ref<T> Retrieve(unsigned int i);
-
-    Ref<T> Get(unsigned int i);
-    Ref<T> Get(const char *id);
-
-    Ref<T> Create(const char *id);
-    Ref<T> Create(const std::string &id) { return Create(id.c_str()); }
-
-    unsigned int Remove(const char *id);
-
-    inline unsigned int Size() const { return unsigned(mObjs.size()); }
-
-    inline T &operator[](size_t i) { return *mObjs[i]; }
-};
-
-struct AssetMetadata {
-    std::string copyright; //!< A copyright message suitable for display to credit the content creator.
-    std::string generator; //!< Tool that generated this glTF model.Useful for debugging.
-
-    struct {
-        std::string api; //!< Specifies the target rendering API (default: "WebGL")
-        std::string version; //!< Specifies the target rendering API (default: "1.0.3")
-    } profile; //!< Specifies the target rendering API and version, e.g., WebGL 1.0.3. (default: {})
-
-    std::string version; //!< The glTF format version
-
-    void Read(Document &doc);
-
-    AssetMetadata() :
-            version() {}
-};
-
-//
-// glTF Asset class
-//
-
-//! Root object for a glTF asset
-class Asset {
-    using IdMap = std::gltf_unordered_map<std::string, int>;
-
-    template <class T>
-    friend class LazyDict;
-    friend struct Buffer; // To access OpenFile
-    friend class AssetWriter;
-
-    std::vector<LazyDictBase *> mDicts;
-
-public:
-    //! Keeps info about the enabled extensions
-    struct Extensions {
-        bool KHR_materials_pbrSpecularGlossiness;
-        bool KHR_materials_unlit;
-        bool KHR_lights_punctual;
-        bool KHR_texture_transform;
-        bool KHR_materials_sheen;
-        bool KHR_materials_clearcoat;
-        bool KHR_materials_transmission;
-        bool KHR_materials_volume;
-        bool KHR_materials_ior;
-        bool KHR_draco_mesh_compression;
-        bool FB_ngon_encoding;
-        bool KHR_texture_basisu;
-
-        Extensions() :
-                KHR_materials_pbrSpecularGlossiness(false), 
-                KHR_materials_unlit(false), 
-                KHR_lights_punctual(false), 
-                KHR_texture_transform(false), 
-                KHR_materials_sheen(false), 
-                KHR_materials_clearcoat(false), 
-                KHR_materials_transmission(false), 
-                KHR_materials_volume(false),
-                KHR_materials_ior(false),
-                KHR_draco_mesh_compression(false),
-                FB_ngon_encoding(false),
-                KHR_texture_basisu(false) {
-            // empty
-        }
-    } extensionsUsed;
-
-    //! Keeps info about the required extensions
-    struct RequiredExtensions {
-        bool KHR_draco_mesh_compression;
-        bool KHR_texture_basisu;
-
-        RequiredExtensions() : KHR_draco_mesh_compression(false), KHR_texture_basisu(false) {
-            // empty
-        }
-    } extensionsRequired;
-
-    AssetMetadata asset;
-    Value *extras;
-
-    // Dictionaries for each type of object
-
-    LazyDict<Accessor> accessors;
-    LazyDict<Animation> animations;
-    LazyDict<Buffer> buffers;
-    LazyDict<BufferView> bufferViews;
-    LazyDict<Camera> cameras;
-    LazyDict<Light> lights;
-    LazyDict<Image> images;
-    LazyDict<Material> materials;
-    LazyDict<Mesh> meshes;
-    LazyDict<Node> nodes;
-    LazyDict<Sampler> samplers;
-    LazyDict<Scene> scenes;
-    LazyDict<Skin> skins;
-    LazyDict<Texture> textures;
-
-    Ref<Scene> scene;
-
-public:
-    Asset(IOSystem *io = nullptr, rapidjson::IRemoteSchemaDocumentProvider *schemaDocumentProvider = nullptr) :
-            mDicts(),
-            extensionsUsed(),
-            extensionsRequired(),
-            asset(),
-            extras(nullptr),
-            accessors(*this, "accessors"),
-            animations(*this, "animations"),
-            buffers(*this, "buffers"),
-            bufferViews(*this, "bufferViews"),
-            cameras(*this, "cameras"),
-            lights(*this, "lights", "KHR_lights_punctual"),
-            images(*this, "images"),
-            materials(*this, "materials"),
-            meshes(*this, "meshes"),
-            nodes(*this, "nodes"),
-            samplers(*this, "samplers"),
-            scenes(*this, "scenes"),
-            skins(*this, "skins"),
-            textures(*this, "textures") ,
-            mIOSystem(io),
-            mSchemaDocumentProvider(schemaDocumentProvider) {
-        // empty
-    }
-
-    //! Main function
-    void Load(const std::string &file, bool isBinary = false);
-
-    //! Parse the AssetMetadata and check that the version is 2.
-    bool CanRead(const std::string &pFile, bool isBinary = false);
-
-    //! Enables binary encoding on the asset
-    void SetAsBinary();
-
-    //! Search for an available name, starting from the given strings
-    std::string FindUniqueID(const std::string &str, const char *suffix);
-
-    Ref<Buffer> GetBodyBuffer() { return mBodyBuffer; }
-
-    Asset(Asset &) = delete;
-    Asset &operator=(const Asset &) = delete;
-
-private:
-    void ReadBinaryHeader(IOStream &stream, std::vector<char> &sceneData);
-
-    /// Obtain a JSON document from the stream.
-    /// \param second argument is a buffer used by the document. It must be kept
-    /// alive while the document is in use.
-    Document ReadDocument(IOStream& stream, bool isBinary, std::vector<char>& sceneData);
-
-    void ReadExtensionsUsed(Document &doc);
-    void ReadExtensionsRequired(Document &doc);
-
-    IOStream *OpenFile(const std::string &path, const char *mode, bool absolute = false);
-
-private:
-    IOSystem *mIOSystem;
-    rapidjson::IRemoteSchemaDocumentProvider *mSchemaDocumentProvider;
-    std::string mCurrentAssetDir;
-    size_t mSceneLength;
-    size_t mBodyOffset;
-    size_t mBodyLength;
-    IdMap mUsedIds;
-    Ref<Buffer> mBodyBuffer;
-};
-
-inline std::string getContextForErrorMessages(const std::string &id, const std::string &name) {
-    std::string context = id;
-    if (!name.empty()) {
-        context += " (\"" + name + "\")";
-    }
-    return context;
-}
-
-} // namespace glTF2
-
-// Include the implementation of the methods
-#include "glTF2Asset.inl"
-
-#endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
-
-#endif // GLTF2ASSET_H_INC
diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2Asset.inl b/libs/assimp/code/AssetLib/glTF2/glTF2Asset.inl
deleted file mode 100644
index ec481a7..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2Asset.inl
+++ /dev/null
@@ -1,2069 +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.
-
-----------------------------------------------------------------------
-*/
-
-#include "AssetLib/glTF/glTFCommon.h"
-
-#include <assimp/MemoryIOWrapper.h>
-#include <assimp/StringUtils.h>
-#include <assimp/DefaultLogger.hpp>
-#include <assimp/Base64.hpp>
-
-// clang-format off
-#ifdef ASSIMP_ENABLE_DRACO
-
-// Google draco library headers spew many warnings. Bad Google, no cookie
-#   if _MSC_VER
-#       pragma warning(push)
-#       pragma warning(disable : 4018) // Signed/unsigned mismatch
-#       pragma warning(disable : 4804) // Unsafe use of type 'bool'
-#   elif defined(__clang__)
-#       pragma clang diagnostic push
-#       pragma clang diagnostic ignored "-Wsign-compare"
-#   elif defined(__GNUC__)
-#       pragma GCC diagnostic push
-#       if (__GNUC__ > 4)
-#           pragma GCC diagnostic ignored "-Wbool-compare"
-#       endif
-#   pragma GCC diagnostic ignored "-Wsign-compare"
-#endif
-
-#include "draco/compression/decode.h"
-#include "draco/core/decoder_buffer.h"
-
-#if _MSC_VER
-#   pragma warning(pop)
-#elif defined(__clang__)
-#   pragma clang diagnostic pop
-#elif defined(__GNUC__)
-#   pragma GCC diagnostic pop
-#endif
-#ifndef DRACO_MESH_COMPRESSION_SUPPORTED
-#   error glTF: KHR_draco_mesh_compression: draco library must have DRACO_MESH_COMPRESSION_SUPPORTED
-#endif
-#endif
-// clang-format on
-
-using namespace Assimp;
-using namespace glTFCommon;
-
-namespace glTF2 {
-
-namespace {
-
-//
-// JSON Value reading helpers
-//
-inline CustomExtension ReadExtensions(const char *name, Value &obj) {
-    CustomExtension ret;
-    ret.name = name;
-    if (obj.IsObject()) {
-        ret.mValues.isPresent = true;
-        for (auto it = obj.MemberBegin(); it != obj.MemberEnd(); ++it) {
-            auto &val = it->value;
-            ret.mValues.value.push_back(ReadExtensions(it->name.GetString(), val));
-        }
-    } else if (obj.IsArray()) {
-        ret.mValues.value.reserve(obj.Size());
-        ret.mValues.isPresent = true;
-        for (unsigned int i = 0; i < obj.Size(); ++i) {
-            ret.mValues.value.push_back(ReadExtensions(name, obj[i]));
-        }
-    } else if (obj.IsNumber()) {
-        if (obj.IsUint64()) {
-            ret.mUint64Value.value = obj.GetUint64();
-            ret.mUint64Value.isPresent = true;
-        } else if (obj.IsInt64()) {
-            ret.mInt64Value.value = obj.GetInt64();
-            ret.mInt64Value.isPresent = true;
-        } else if (obj.IsDouble()) {
-            ret.mDoubleValue.value = obj.GetDouble();
-            ret.mDoubleValue.isPresent = true;
-        }
-    } else if (obj.IsString()) {
-        ReadValue(obj, ret.mStringValue);
-        ret.mStringValue.isPresent = true;
-    } else if (obj.IsBool()) {
-        ret.mBoolValue.value = obj.GetBool();
-        ret.mBoolValue.isPresent = true;
-    }
-    return ret;
-}
-
-inline void CopyData(size_t count, const uint8_t *src, size_t src_stride,
-        uint8_t *dst, size_t dst_stride) {
-    if (src_stride == dst_stride) {
-        memcpy(dst, src, count * src_stride);
-        return;
-    }
-
-    size_t sz = std::min(src_stride, dst_stride);
-    for (size_t i = 0; i < count; ++i) {
-        memcpy(dst, src, sz);
-        if (sz < dst_stride) {
-            memset(dst + sz, 0, dst_stride - sz);
-        }
-        src += src_stride;
-        dst += dst_stride;
-    }
-}
-
-void SetVector(vec4 &v, const float (&in)[4]) {
-    v[0] = in[0];
-    v[1] = in[1];
-    v[2] = in[2];
-    v[3] = in[3];
-}
-
-void SetVector(vec3 &v, const float (&in)[3]) {
-    v[0] = in[0];
-    v[1] = in[1];
-    v[2] = in[2];
-}
-
-template <int N>
-inline int Compare(const char *attr, const char (&str)[N]) {
-    return (strncmp(attr, str, N - 1) == 0) ? N - 1 : 0;
-}
-
-#if _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4706)
-#endif // _MSC_VER
-
-inline bool GetAttribVector(Mesh::Primitive &p, const char *attr, Mesh::AccessorList *&v, int &pos) {
-    if ((pos = Compare(attr, "POSITION"))) {
-        v = &(p.attributes.position);
-    } else if ((pos = Compare(attr, "NORMAL"))) {
-        v = &(p.attributes.normal);
-    } else if ((pos = Compare(attr, "TANGENT"))) {
-        v = &(p.attributes.tangent);
-    } else if ((pos = Compare(attr, "TEXCOORD"))) {
-        v = &(p.attributes.texcoord);
-    } else if ((pos = Compare(attr, "COLOR"))) {
-        v = &(p.attributes.color);
-    } else if ((pos = Compare(attr, "JOINT"))) {
-        v = &(p.attributes.joint);
-    } else if ((pos = Compare(attr, "JOINTMATRIX"))) {
-        v = &(p.attributes.jointmatrix);
-    } else if ((pos = Compare(attr, "WEIGHT"))) {
-        v = &(p.attributes.weight);
-    } else
-        return false;
-    return true;
-}
-
-inline bool GetAttribTargetVector(Mesh::Primitive &p, const int targetIndex, const char *attr, Mesh::AccessorList *&v, int &pos) {
-    if ((pos = Compare(attr, "POSITION"))) {
-        v = &(p.targets[targetIndex].position);
-    } else if ((pos = Compare(attr, "NORMAL"))) {
-        v = &(p.targets[targetIndex].normal);
-    } else if ((pos = Compare(attr, "TANGENT"))) {
-        v = &(p.targets[targetIndex].tangent);
-    } else
-        return false;
-    return true;
-}
-
-} // namespace
-
-inline Value *Object::FindString(Value &val, const char *memberId) {
-    return FindStringInContext(val, memberId, id.c_str(), name.c_str());
-}
-
-inline Value *Object::FindNumber(Value &val, const char *memberId) {
-    return FindNumberInContext(val, memberId, id.c_str(), name.c_str());
-}
-
-inline Value *Object::FindUInt(Value &val, const char *memberId) {
-    return FindUIntInContext(val, memberId, id.c_str(), name.c_str());
-}
-
-inline Value *Object::FindArray(Value &val, const char *memberId) {
-    return FindArrayInContext(val, memberId, id.c_str(), name.c_str());
-}
-
-inline Value *Object::FindObject(Value &val, const char *memberId) {
-    return FindObjectInContext(val, memberId, id.c_str(), name.c_str());
-}
-
-inline Value *Object::FindExtension(Value &val, const char *extensionId) {
-    return FindExtensionInContext(val, extensionId, id.c_str(), name.c_str());
-}
-
-inline void Object::ReadExtensions(Value &val) {
-    if (Value *curExtensions = FindObject(val, "extensions")) {
-        this->customExtensions = glTF2::ReadExtensions("extensions", *curExtensions);
-    }
-}
-
-inline void Object::ReadExtras(Value &val) {
-    if (Value *curExtras = FindObject(val, "extras")) {
-        this->extras = glTF2::ReadExtensions("extras", *curExtras);
-    }
-}
-
-#ifdef ASSIMP_ENABLE_DRACO
-
-template <typename T>
-inline void CopyFaceIndex_Draco(Buffer &decodedIndexBuffer, const draco::Mesh &draco_mesh) {
-    const size_t faceStride = sizeof(T) * 3;
-    for (draco::FaceIndex f(0); f < draco_mesh.num_faces(); ++f) {
-        const draco::Mesh::Face &face = draco_mesh.face(f);
-        T indices[3] = { static_cast<T>(face[0].value()), static_cast<T>(face[1].value()), static_cast<T>(face[2].value()) };
-        memcpy(decodedIndexBuffer.GetPointer() + (f.value() * faceStride), &indices[0], faceStride);
-    }
-}
-
-inline void SetDecodedIndexBuffer_Draco(const draco::Mesh &dracoMesh, Mesh::Primitive &prim) {
-    if (!prim.indices || dracoMesh.num_faces() == 0)
-        return;
-
-    // Create a decoded Index buffer (if there is one)
-    size_t componentBytes = prim.indices->GetBytesPerComponent();
-
-    std::unique_ptr<Buffer> decodedIndexBuffer(new Buffer());
-    decodedIndexBuffer->Grow(dracoMesh.num_faces() * 3 * componentBytes);
-
-    // If accessor uses the same size as draco implementation, copy the draco buffer directly
-
-    // Usually uint32_t but shouldn't assume
-    if (sizeof(dracoMesh.face(draco::FaceIndex(0))[0]) == componentBytes) {
-        memcpy(decodedIndexBuffer->GetPointer(), &dracoMesh.face(draco::FaceIndex(0))[0], decodedIndexBuffer->byteLength);
-        return;
-    }
-
-    // Not same size, convert
-    switch (componentBytes) {
-    case sizeof(uint32_t):
-        CopyFaceIndex_Draco<uint32_t>(*decodedIndexBuffer, dracoMesh);
-        break;
-    case sizeof(uint16_t):
-        CopyFaceIndex_Draco<uint16_t>(*decodedIndexBuffer, dracoMesh);
-        break;
-    case sizeof(uint8_t):
-        CopyFaceIndex_Draco<uint8_t>(*decodedIndexBuffer, dracoMesh);
-        break;
-    default:
-        ai_assert(false);
-        break;
-    }
-
-    // Assign this alternate data buffer to the accessor
-    prim.indices->decodedBuffer.swap(decodedIndexBuffer);
-}
-
-template <typename T>
-static bool GetAttributeForAllPoints_Draco(const draco::Mesh &dracoMesh,
-        const draco::PointAttribute &dracoAttribute,
-        Buffer &outBuffer) {
-    size_t byteOffset = 0;
-    T values[4] = { 0, 0, 0, 0 };
-    for (draco::PointIndex i(0); i < dracoMesh.num_points(); ++i) {
-        const draco::AttributeValueIndex val_index = dracoAttribute.mapped_index(i);
-        if (!dracoAttribute.ConvertValue<T>(val_index, dracoAttribute.num_components(), values)) {
-            return false;
-        }
-
-        memcpy(outBuffer.GetPointer() + byteOffset, &values[0], sizeof(T) * dracoAttribute.num_components());
-        byteOffset += sizeof(T) * dracoAttribute.num_components();
-    }
-
-    return true;
-}
-
-inline void SetDecodedAttributeBuffer_Draco(const draco::Mesh &dracoMesh, uint32_t dracoAttribId, Accessor &accessor) {
-    // Create decoded buffer
-    const draco::PointAttribute *pDracoAttribute = dracoMesh.GetAttributeByUniqueId(dracoAttribId);
-    if (pDracoAttribute == nullptr) {
-        throw DeadlyImportError("GLTF: Invalid draco attribute id: ", dracoAttribId);
-    }
-
-    size_t componentBytes = accessor.GetBytesPerComponent();
-
-    std::unique_ptr<Buffer> decodedAttribBuffer(new Buffer());
-    decodedAttribBuffer->Grow(dracoMesh.num_points() * pDracoAttribute->num_components() * componentBytes);
-
-    switch (accessor.componentType) {
-    case ComponentType_BYTE:
-        GetAttributeForAllPoints_Draco<int8_t>(dracoMesh, *pDracoAttribute, *decodedAttribBuffer);
-        break;
-    case ComponentType_UNSIGNED_BYTE:
-        GetAttributeForAllPoints_Draco<uint8_t>(dracoMesh, *pDracoAttribute, *decodedAttribBuffer);
-        break;
-    case ComponentType_SHORT:
-        GetAttributeForAllPoints_Draco<int16_t>(dracoMesh, *pDracoAttribute, *decodedAttribBuffer);
-        break;
-    case ComponentType_UNSIGNED_SHORT:
-        GetAttributeForAllPoints_Draco<uint16_t>(dracoMesh, *pDracoAttribute, *decodedAttribBuffer);
-        break;
-    case ComponentType_UNSIGNED_INT:
-        GetAttributeForAllPoints_Draco<uint32_t>(dracoMesh, *pDracoAttribute, *decodedAttribBuffer);
-        break;
-    case ComponentType_FLOAT:
-        GetAttributeForAllPoints_Draco<float>(dracoMesh, *pDracoAttribute, *decodedAttribBuffer);
-        break;
-    default:
-        ai_assert(false);
-        break;
-    }
-
-    // Assign this alternate data buffer to the accessor
-    accessor.decodedBuffer.swap(decodedAttribBuffer);
-}
-
-#endif // ASSIMP_ENABLE_DRACO
-
-//
-// LazyDict methods
-//
-
-template <class T>
-inline LazyDict<T>::LazyDict(Asset &asset, const char *dictId, const char *extId) :
-        mDictId(dictId),
-        mExtId(extId),
-        mDict(0),
-        mAsset(asset) {
-    asset.mDicts.push_back(this); // register to the list of dictionaries
-}
-
-template <class T>
-inline LazyDict<T>::~LazyDict() {
-    for (size_t i = 0; i < mObjs.size(); ++i) {
-        delete mObjs[i];
-    }
-}
-
-template <class T>
-inline void LazyDict<T>::AttachToDocument(Document &doc) {
-    Value *container = nullptr;
-    const char *context = nullptr;
-
-    if (mExtId) {
-        if (Value *exts = FindObject(doc, "extensions")) {
-            container = FindObjectInContext(*exts, mExtId, "extensions");
-            context = mExtId;
-        }
-    } else {
-        container = &doc;
-        context = "the document";
-    }
-
-    if (container) {
-        mDict = FindArrayInContext(*container, mDictId, context);
-    }
-}
-
-template <class T>
-inline void LazyDict<T>::DetachFromDocument() {
-    mDict = nullptr;
-}
-
-template <class T>
-unsigned int LazyDict<T>::Remove(const char *id) {
-    id = T::TranslateId(mAsset, id);
-
-    typename IdDict::iterator objIt = mObjsById.find(id);
-
-    if (objIt == mObjsById.end()) {
-        throw DeadlyExportError("GLTF: Object with id \"" + std::string(id) + "\" is not found");
-    }
-
-    const unsigned int index = objIt->second;
-
-    mAsset.mUsedIds[id] = false;
-    mObjsById.erase(id);
-    mObjsByOIndex.erase(index);
-    delete mObjs[index];
-    mObjs.erase(mObjs.begin() + index);
-
-    //update index of object in mObjs;
-    for (unsigned int i = index; i < mObjs.size(); ++i) {
-        T *obj = mObjs[i];
-
-        obj->index = i;
-    }
-
-    for (IdDict::iterator it = mObjsById.begin(); it != mObjsById.end(); ++it) {
-        if (it->second <= index) {
-            continue;
-        }
-
-        mObjsById[it->first] = it->second - 1;
-    }
-
-    for (Dict::iterator it = mObjsByOIndex.begin(); it != mObjsByOIndex.end(); ++it) {
-        if (it->second <= index) {
-            continue;
-        }
-
-        mObjsByOIndex[it->first] = it->second - 1;
-    }
-
-    return index;
-}
-
-template <class T>
-Ref<T> LazyDict<T>::Retrieve(unsigned int i) {
-
-    typename Dict::iterator it = mObjsByOIndex.find(i);
-    if (it != mObjsByOIndex.end()) { // already created?
-        return Ref<T>(mObjs, it->second);
-    }
-
-    // read it from the JSON object
-    if (!mDict) {
-        throw DeadlyImportError("GLTF: Missing section \"", mDictId, "\"");
-    }
-
-    if (!mDict->IsArray()) {
-        throw DeadlyImportError("GLTF: Field \"", mDictId, "\"  is not an array");
-    }
-
-    if (i >= mDict->Size()) {
-        throw DeadlyImportError("GLTF: Array index ", i, " is out of bounds (", mDict->Size(), ") for \"", mDictId, "\"");
-    }
-
-    Value &obj = (*mDict)[i];
-
-    if (!obj.IsObject()) {
-        throw DeadlyImportError("GLTF: Object at index ", i, " in array \"", mDictId, "\" is not a JSON object");
-    }
-
-    if (mRecursiveReferenceCheck.find(i) != mRecursiveReferenceCheck.end()) {
-        throw DeadlyImportError("GLTF: Object at index ", i, " in array \"", mDictId, "\" has recursive reference to itself");
-    }
-    mRecursiveReferenceCheck.insert(i);
-
-    // Unique ptr prevents memory leak in case of Read throws an exception
-    auto inst = std::unique_ptr<T>(new T());
-    // Try to make this human readable so it can be used in error messages.
-    inst->id = std::string(mDictId) + "[" + ai_to_string(i) + "]";
-    inst->oIndex = i;
-    ReadMember(obj, "name", inst->name);
-    inst->Read(obj, mAsset);
-    inst->ReadExtensions(obj);
-    inst->ReadExtras(obj);
-
-    Ref<T> result = Add(inst.release());
-    mRecursiveReferenceCheck.erase(i);
-    return result;
-}
-
-template <class T>
-Ref<T> LazyDict<T>::Get(unsigned int i) {
-    return Ref<T>(mObjs, i);
-}
-
-template <class T>
-Ref<T> LazyDict<T>::Get(const char *id) {
-    id = T::TranslateId(mAsset, id);
-
-    typename IdDict::iterator it = mObjsById.find(id);
-    if (it != mObjsById.end()) { // already created?
-        return Ref<T>(mObjs, it->second);
-    }
-
-    return Ref<T>();
-}
-
-template <class T>
-Ref<T> LazyDict<T>::Add(T *obj) {
-    unsigned int idx = unsigned(mObjs.size());
-    mObjs.push_back(obj);
-    mObjsByOIndex[obj->oIndex] = idx;
-    mObjsById[obj->id] = idx;
-    mAsset.mUsedIds[obj->id] = true;
-    return Ref<T>(mObjs, idx);
-}
-
-template <class T>
-Ref<T> LazyDict<T>::Create(const char *id) {
-    Asset::IdMap::iterator it = mAsset.mUsedIds.find(id);
-    if (it != mAsset.mUsedIds.end()) {
-        throw DeadlyImportError("GLTF: two objects with the same ID exist");
-    }
-    T *inst = new T();
-    unsigned int idx = unsigned(mObjs.size());
-    inst->id = id;
-    inst->index = idx;
-    inst->oIndex = idx;
-    return Add(inst);
-}
-
-//
-// glTF dictionary objects methods
-//
-inline Buffer::Buffer() :
-        byteLength(0),
-        type(Type_arraybuffer),
-        EncodedRegion_Current(nullptr),
-        mIsSpecial(false) {}
-
-inline Buffer::~Buffer() {
-    for (SEncodedRegion *reg : EncodedRegion_List)
-        delete reg;
-}
-
-inline const char *Buffer::TranslateId(Asset & /*r*/, const char *id) {
-    return id;
-}
-
-inline void Buffer::Read(Value &obj, Asset &r) {
-    size_t statedLength = MemberOrDefault<size_t>(obj, "byteLength", 0);
-    byteLength = statedLength;
-
-    Value *it = FindString(obj, "uri");
-    if (!it) {
-        if (statedLength > 0) {
-            throw DeadlyImportError("GLTF: buffer with non-zero length missing the \"uri\" attribute");
-        }
-        return;
-    }
-
-    const char *uri = it->GetString();
-
-    glTFCommon::Util::DataURI dataURI;
-    if (ParseDataURI(uri, it->GetStringLength(), dataURI)) {
-        if (dataURI.base64) {
-            uint8_t *data = nullptr;
-            this->byteLength = Base64::Decode(dataURI.data, dataURI.dataLength, data);
-            this->mData.reset(data, std::default_delete<uint8_t[]>());
-
-            if (statedLength > 0 && this->byteLength != statedLength) {
-                throw DeadlyImportError("GLTF: buffer \"", id, "\", expected ", ai_to_string(statedLength),
-                        " bytes, but found ", ai_to_string(dataURI.dataLength));
-            }
-        } else { // assume raw data
-            if (statedLength != dataURI.dataLength) {
-                throw DeadlyImportError("GLTF: buffer \"", id, "\", expected ", ai_to_string(statedLength),
-                        " bytes, but found ", ai_to_string(dataURI.dataLength));
-            }
-
-            this->mData.reset(new uint8_t[dataURI.dataLength], std::default_delete<uint8_t[]>());
-            memcpy(this->mData.get(), dataURI.data, dataURI.dataLength);
-        }
-    } else { // Local file
-        if (byteLength > 0) {
-            std::string dir = !r.mCurrentAssetDir.empty() ? (r.mCurrentAssetDir.back() == '/' ? r.mCurrentAssetDir : r.mCurrentAssetDir + '/') : "";
-
-            IOStream *file = r.OpenFile(dir + uri, "rb");
-            if (file) {
-                bool ok = LoadFromStream(*file, byteLength);
-                delete file;
-
-                if (!ok)
-                    throw DeadlyImportError("GLTF: error while reading referenced file \"", uri, "\"");
-            } else {
-                throw DeadlyImportError("GLTF: could not open referenced file \"", uri, "\"");
-            }
-        }
-    }
-}
-
-inline bool Buffer::LoadFromStream(IOStream &stream, size_t length, size_t baseOffset) {
-    byteLength = length ? length : stream.FileSize();
-
-    if (byteLength > stream.FileSize()) {
-        throw DeadlyImportError("GLTF: Invalid byteLength exceeds size of actual data.");
-    }
-
-    if (baseOffset) {
-        stream.Seek(baseOffset, aiOrigin_SET);
-    }
-
-    mData.reset(new uint8_t[byteLength], std::default_delete<uint8_t[]>());
-
-    if (stream.Read(mData.get(), byteLength, 1) != 1) {
-        return false;
-    }
-    return true;
-}
-
-inline void Buffer::EncodedRegion_Mark(const size_t pOffset, const size_t pEncodedData_Length, uint8_t *pDecodedData, const size_t pDecodedData_Length, const std::string &pID) {
-    // Check pointer to data
-    if (pDecodedData == nullptr) throw DeadlyImportError("GLTF: for marking encoded region pointer to decoded data must be provided.");
-
-    // Check offset
-    if (pOffset > byteLength) {
-        const uint8_t val_size = 32;
-
-        char val[val_size];
-
-        ai_snprintf(val, val_size, AI_SIZEFMT, pOffset);
-        throw DeadlyImportError("GLTF: incorrect offset value (", val, ") for marking encoded region.");
-    }
-
-    // Check length
-    if ((pOffset + pEncodedData_Length) > byteLength) {
-        const uint8_t val_size = 64;
-
-        char val[val_size];
-
-        ai_snprintf(val, val_size, AI_SIZEFMT "/" AI_SIZEFMT, pOffset, pEncodedData_Length);
-        throw DeadlyImportError("GLTF: encoded region with offset/length (", val, ") is out of range.");
-    }
-
-    // Add new region
-    EncodedRegion_List.push_back(new SEncodedRegion(pOffset, pEncodedData_Length, pDecodedData, pDecodedData_Length, pID));
-    // And set new value for "byteLength"
-    byteLength += (pDecodedData_Length - pEncodedData_Length);
-}
-
-inline void Buffer::EncodedRegion_SetCurrent(const std::string &pID) {
-    if ((EncodedRegion_Current != nullptr) && (EncodedRegion_Current->ID == pID)) {
-        return;
-    }
-
-    for (SEncodedRegion *reg : EncodedRegion_List) {
-        if (reg->ID == pID) {
-            EncodedRegion_Current = reg;
-            return;
-        }
-    }
-
-    throw DeadlyImportError("GLTF: EncodedRegion with ID: \"", pID, "\" not found.");
-}
-
-inline bool Buffer::ReplaceData(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t *pReplace_Data, const size_t pReplace_Count) {
-
-    if ((pBufferData_Count == 0) || (pReplace_Count == 0) || (pReplace_Data == nullptr)) {
-        return false;
-    }
-
-    const size_t new_data_size = byteLength + pReplace_Count - pBufferData_Count;
-    uint8_t *new_data = new uint8_t[new_data_size];
-    // Copy data which place before replacing part.
-    ::memcpy(new_data, mData.get(), pBufferData_Offset);
-    // Copy new data.
-    ::memcpy(&new_data[pBufferData_Offset], pReplace_Data, pReplace_Count);
-    // Copy data which place after replacing part.
-    ::memcpy(&new_data[pBufferData_Offset + pReplace_Count], &mData.get()[pBufferData_Offset + pBufferData_Count], pBufferData_Offset);
-    // Apply new data
-    mData.reset(new_data, std::default_delete<uint8_t[]>());
-    byteLength = new_data_size;
-
-    return true;
-}
-
-inline bool Buffer::ReplaceData_joint(const size_t pBufferData_Offset, const size_t pBufferData_Count, const uint8_t *pReplace_Data, const size_t pReplace_Count) {
-    if ((pBufferData_Count == 0) || (pReplace_Count == 0) || (pReplace_Data == nullptr)) {
-        return false;
-    }
-
-    const size_t new_data_size = byteLength + pReplace_Count - pBufferData_Count;
-    uint8_t *new_data = new uint8_t[new_data_size];
-    // Copy data which place before replacing part.
-    memcpy(new_data, mData.get(), pBufferData_Offset);
-    // Copy new data.
-    memcpy(&new_data[pBufferData_Offset], pReplace_Data, pReplace_Count);
-    // Copy data which place after replacing part.
-    memcpy(&new_data[pBufferData_Offset + pReplace_Count], &mData.get()[pBufferData_Offset + pBufferData_Count], new_data_size - (pBufferData_Offset + pReplace_Count));
-    // Apply new data
-    mData.reset(new_data, std::default_delete<uint8_t[]>());
-    byteLength = new_data_size;
-
-    return true;
-}
-
-inline size_t Buffer::AppendData(uint8_t *data, size_t length) {
-    const size_t offset = this->byteLength;
-
-    // Force alignment to 4 bits
-    const size_t paddedLength = (length + 3) & ~3;
-    Grow(paddedLength);
-    memcpy(mData.get() + offset, data, length);
-    memset(mData.get() + offset + length, 0, paddedLength - length);
-    return offset;
-}
-
-inline void Buffer::Grow(size_t amount) {
-    if (amount <= 0) {
-        return;
-    }
-
-    // Capacity is big enough
-    if (capacity >= byteLength + amount) {
-        byteLength += amount;
-        return;
-    }
-
-    // Just allocate data which we need
-    capacity = byteLength + amount;
-
-    uint8_t *b = new uint8_t[capacity];
-    if (nullptr != mData) {
-        memcpy(b, mData.get(), byteLength);
-    }
-    mData.reset(b, std::default_delete<uint8_t[]>());
-    byteLength += amount;
-}
-
-//
-// struct BufferView
-//
-inline void BufferView::Read(Value &obj, Asset &r) {
-    if (Value *bufferVal = FindUInt(obj, "buffer")) {
-        buffer = r.buffers.Retrieve(bufferVal->GetUint());
-    }
-
-    if (!buffer) {
-        throw DeadlyImportError("GLTF: Buffer view without valid buffer.");
-    }
-
-    byteOffset = MemberOrDefault(obj, "byteOffset", size_t(0));
-    byteLength = MemberOrDefault(obj, "byteLength", size_t(0));
-    byteStride = MemberOrDefault(obj, "byteStride", 0u);
-
-    // Check length
-    if ((byteOffset + byteLength) > buffer->byteLength) {
-        throw DeadlyImportError("GLTF: Buffer view with offset/length (", byteOffset, "/", byteLength, ") is out of range.");
-    }
-}
-
-inline uint8_t *BufferView::GetPointer(size_t accOffset) {
-    if (!buffer) {
-        return nullptr;
-    }
-    uint8_t *basePtr = buffer->GetPointer();
-    if (!basePtr) {
-        return nullptr;
-    }
-
-    size_t offset = accOffset + byteOffset;
-    if (buffer->EncodedRegion_Current != nullptr) {
-        const size_t begin = buffer->EncodedRegion_Current->Offset;
-        const size_t end = begin + buffer->EncodedRegion_Current->DecodedData_Length;
-        if ((offset >= begin) && (offset < end)) {
-            return &buffer->EncodedRegion_Current->DecodedData[offset - begin];
-        }
-    }
-
-    return basePtr + offset;
-}
-
-//
-// struct Accessor
-//
-inline void Accessor::Sparse::PopulateData(size_t numBytes, uint8_t *bytes) {
-    if (bytes) {
-        data.assign(bytes, bytes + numBytes);
-    } else {
-        data.resize(numBytes, 0x00);
-    }
-}
-
-inline void Accessor::Sparse::PatchData(unsigned int elementSize) {
-    uint8_t *pIndices = indices->GetPointer(indicesByteOffset);
-    const unsigned int indexSize = int(ComponentTypeSize(indicesType));
-    uint8_t *indicesEnd = pIndices + count * indexSize;
-
-    uint8_t *pValues = values->GetPointer(valuesByteOffset);
-    while (pIndices != indicesEnd) {
-        size_t offset;
-        switch (indicesType) {
-        case ComponentType_UNSIGNED_BYTE:
-            offset = *pIndices;
-            break;
-        case ComponentType_UNSIGNED_SHORT:
-            offset = *reinterpret_cast<uint16_t *>(pIndices);
-            break;
-        case ComponentType_UNSIGNED_INT:
-            offset = *reinterpret_cast<uint32_t *>(pIndices);
-            break;
-        default:
-            // have fun with float and negative values from signed types as indices.
-            throw DeadlyImportError("Unsupported component type in index.");
-        }
-
-        offset *= elementSize;
-
-        if (offset + elementSize > data.size()) {
-            throw DeadlyImportError("Invalid sparse accessor. Byte offset for patching points outside allocated memory.");
-        }
-
-        std::memcpy(data.data() + offset, pValues, elementSize);
-
-        pValues += elementSize;
-        pIndices += indexSize;
-    }
-}
-
-inline void Accessor::Read(Value &obj, Asset &r) {
-    if (Value *bufferViewVal = FindUInt(obj, "bufferView")) {
-        bufferView = r.bufferViews.Retrieve(bufferViewVal->GetUint());
-    }
-
-    byteOffset = MemberOrDefault(obj, "byteOffset", size_t(0));
-    componentType = MemberOrDefault(obj, "componentType", ComponentType_BYTE);
-    {
-        const Value *countValue = FindUInt(obj, "count");
-        if (!countValue) {
-            throw DeadlyImportError("A count value is required, when reading ", id.c_str(), name.empty() ? "" : " (" + name + ")");
-        }
-        count = countValue->GetUint();
-    }
-
-    const char *typestr;
-    type = ReadMember(obj, "type", typestr) ? AttribType::FromString(typestr) : AttribType::SCALAR;
-
-    if (bufferView) {
-        // Check length
-        unsigned long long byteLength = (unsigned long long)GetBytesPerComponent() * (unsigned long long)count;
-
-        // handle integer overflow
-        if (byteLength < count) {
-            throw DeadlyImportError("GLTF: Accessor with offset/count (", byteOffset, "/", count, ") is out of range.");
-        }
-
-        if ((byteOffset + byteLength) > bufferView->byteLength || (bufferView->byteOffset + byteOffset + byteLength) > bufferView->buffer->byteLength) {
-            throw DeadlyImportError("GLTF: Accessor with offset/length (", byteOffset, "/", byteLength, ") is out of range.");
-        }
-    }
-
-    if (Value *sparseValue = FindObject(obj, "sparse")) {
-        sparse.reset(new Sparse);
-        // count
-        ReadMember(*sparseValue, "count", sparse->count);
-
-        // indices
-        if (Value *indicesValue = FindObject(*sparseValue, "indices")) {
-            //indices bufferView
-            Value *indiceViewID = FindUInt(*indicesValue, "bufferView");
-            sparse->indices = r.bufferViews.Retrieve(indiceViewID->GetUint());
-            //indices byteOffset
-            sparse->indicesByteOffset = MemberOrDefault(*indicesValue, "byteOffset", size_t(0));
-            //indices componentType
-            sparse->indicesType = MemberOrDefault(*indicesValue, "componentType", ComponentType_BYTE);
-            //sparse->indices->Read(*indicesValue, r);
-        } else {
-            // indicesType
-            sparse->indicesType = MemberOrDefault(*sparseValue, "componentType", ComponentType_UNSIGNED_SHORT);
-        }
-
-        // value
-        if (Value *valuesValue = FindObject(*sparseValue, "values")) {
-            //value bufferView
-            Value *valueViewID = FindUInt(*valuesValue, "bufferView");
-            sparse->values = r.bufferViews.Retrieve(valueViewID->GetUint());
-            //value byteOffset
-            sparse->valuesByteOffset = MemberOrDefault(*valuesValue, "byteOffset", size_t(0));
-            //sparse->values->Read(*valuesValue, r);
-        }
-
-
-        const unsigned int elementSize = GetElementSize();
-        const size_t dataSize = count * elementSize;
-        sparse->PopulateData(dataSize, bufferView ? bufferView->GetPointer(byteOffset) : 0);
-        sparse->PatchData(elementSize);
-    }
-}
-
-inline unsigned int Accessor::GetNumComponents() {
-    return AttribType::GetNumComponents(type);
-}
-
-inline unsigned int Accessor::GetBytesPerComponent() {
-    return int(ComponentTypeSize(componentType));
-}
-
-inline unsigned int Accessor::GetElementSize() {
-    return GetNumComponents() * GetBytesPerComponent();
-}
-
-inline uint8_t *Accessor::GetPointer() {
-    if (decodedBuffer)
-        return decodedBuffer->GetPointer();
-
-    if (sparse)
-        return sparse->data.data();
-
-    if (!bufferView || !bufferView->buffer) return nullptr;
-    uint8_t *basePtr = bufferView->buffer->GetPointer();
-    if (!basePtr) return nullptr;
-
-    size_t offset = byteOffset + bufferView->byteOffset;
-
-    // Check if region is encoded.
-    if (bufferView->buffer->EncodedRegion_Current != nullptr) {
-        const size_t begin = bufferView->buffer->EncodedRegion_Current->Offset;
-        const size_t end = begin + bufferView->buffer->EncodedRegion_Current->DecodedData_Length;
-
-        if ((offset >= begin) && (offset < end))
-            return &bufferView->buffer->EncodedRegion_Current->DecodedData[offset - begin];
-    }
-
-    return basePtr + offset;
-}
-
-inline size_t Accessor::GetStride() {
-    // Decoded buffer is always packed
-    if (decodedBuffer)
-        return GetElementSize();
-
-    // Sparse and normal bufferView
-    return (bufferView && bufferView->byteStride ? bufferView->byteStride : GetElementSize());
-}
-
-inline size_t Accessor::GetMaxByteSize() {
-    if (decodedBuffer)
-        return decodedBuffer->byteLength;
-
-    return (bufferView ? bufferView->byteLength : sparse->data.size());
-}
-
-template <class T>
-void Accessor::ExtractData(T *&outData) {
-    uint8_t *data = GetPointer();
-    if (!data) {
-        throw DeadlyImportError("GLTF2: data is null when extracting data from ", getContextForErrorMessages(id, name));
-    }
-
-    const size_t elemSize = GetElementSize();
-    const size_t totalSize = elemSize * count;
-
-    const size_t stride = GetStride();
-
-    const size_t targetElemSize = sizeof(T);
-
-    if (elemSize > targetElemSize) {
-        throw DeadlyImportError("GLTF: elemSize ", elemSize, " > targetElemSize ", targetElemSize, " in ", getContextForErrorMessages(id, name));
-    }
-
-    const size_t maxSize = GetMaxByteSize();
-    if (count * stride > maxSize) {
-        throw DeadlyImportError("GLTF: count*stride ", (count * stride), " > maxSize ", maxSize, " in ", getContextForErrorMessages(id, name));
-    }
-
-    outData = new T[count];
-    if (stride == elemSize && targetElemSize == elemSize) {
-        memcpy(outData, data, totalSize);
-    } else {
-        for (size_t i = 0; i < count; ++i) {
-            memcpy(outData + i, data + i * stride, elemSize);
-        }
-    }
-}
-
-inline void Accessor::WriteData(size_t _count, const void *src_buffer, size_t src_stride) {
-    uint8_t *buffer_ptr = bufferView->buffer->GetPointer();
-    size_t offset = byteOffset + bufferView->byteOffset;
-
-    size_t dst_stride = GetNumComponents() * GetBytesPerComponent();
-
-    const uint8_t *src = reinterpret_cast<const uint8_t *>(src_buffer);
-    uint8_t *dst = reinterpret_cast<uint8_t *>(buffer_ptr + offset);
-
-    ai_assert(dst + _count * dst_stride <= buffer_ptr + bufferView->buffer->byteLength);
-    CopyData(_count, src, src_stride, dst, dst_stride);
-}
-
-inline void Accessor::WriteSparseValues(size_t _count, const void *src_data, size_t src_dataStride) {
-    if (!sparse)
-        return;
-
-    // values
-    uint8_t *value_buffer_ptr = sparse->values->buffer->GetPointer();
-    size_t value_offset = sparse->valuesByteOffset + sparse->values->byteOffset;
-    size_t value_dst_stride = GetNumComponents() * GetBytesPerComponent();
-    const uint8_t *value_src = reinterpret_cast<const uint8_t *>(src_data);
-    uint8_t *value_dst = reinterpret_cast<uint8_t *>(value_buffer_ptr + value_offset);
-    ai_assert(value_dst + _count * value_dst_stride <= value_buffer_ptr + sparse->values->buffer->byteLength);
-    CopyData(_count, value_src, src_dataStride, value_dst, value_dst_stride);
-}
-
-inline void Accessor::WriteSparseIndices(size_t _count, const void *src_idx, size_t src_idxStride) {
-    if (!sparse)
-        return;
-
-    // indices
-    uint8_t *indices_buffer_ptr = sparse->indices->buffer->GetPointer();
-    size_t indices_offset = sparse->indicesByteOffset + sparse->indices->byteOffset;
-    size_t indices_dst_stride = 1 * sizeof(unsigned short);
-    const uint8_t *indices_src = reinterpret_cast<const uint8_t *>(src_idx);
-    uint8_t *indices_dst = reinterpret_cast<uint8_t *>(indices_buffer_ptr + indices_offset);
-    ai_assert(indices_dst + _count * indices_dst_stride <= indices_buffer_ptr + sparse->indices->buffer->byteLength);
-    CopyData(_count, indices_src, src_idxStride, indices_dst, indices_dst_stride);
-}
-
-inline Accessor::Indexer::Indexer(Accessor &acc) :
-    accessor(acc),
-    data(acc.GetPointer()),
-    elemSize(acc.GetElementSize()),
-    stride(acc.GetStride()) {
-}
-
-//! Accesses the i-th value as defined by the accessor
-template <class T>
-T Accessor::Indexer::GetValue(int i) {
-    ai_assert(data);
-    if (i * stride >= accessor.GetMaxByteSize()) {
-        throw DeadlyImportError("GLTF: Invalid index ", i, ", count out of range for buffer with stride ", stride, " and size ", accessor.GetMaxByteSize(), ".");
-    }
-    // Ensure that the memcpy doesn't overwrite the local.
-    const size_t sizeToCopy = std::min(elemSize, sizeof(T));
-    T value = T();
-    // Assume platform endianness matches GLTF binary data (which is little-endian).
-    memcpy(&value, data + i * stride, sizeToCopy);
-    return value;
-}
-
-inline Image::Image() :
-        width(0),
-        height(0),
-        mDataLength(0) {
-}
-
-inline void Image::Read(Value &obj, Asset &r) {
-    //basisu: no need to handle .ktx2, .basis, load as is
-    if (!mDataLength) {
-        Value *curUri = FindString(obj, "uri");
-        if (nullptr != curUri) {
-            const char *uristr = curUri->GetString();
-
-            glTFCommon::Util::DataURI dataURI;
-            if (ParseDataURI(uristr, curUri->GetStringLength(), dataURI)) {
-                mimeType = dataURI.mediaType;
-                if (dataURI.base64) {
-                    uint8_t *ptr = nullptr;
-                    mDataLength = Base64::Decode(dataURI.data, dataURI.dataLength, ptr);
-                    mData.reset(ptr);
-                }
-            } else {
-                this->uri = uristr;
-            }
-        } else if (Value *bufferViewVal = FindUInt(obj, "bufferView")) {
-            this->bufferView = r.bufferViews.Retrieve(bufferViewVal->GetUint());
-            if (Value *mtype = FindString(obj, "mimeType")) {
-                this->mimeType = mtype->GetString();
-            }
-            if (!this->bufferView || this->mimeType.empty()) {
-                throw DeadlyImportError("GLTF2: ", getContextForErrorMessages(id, name), " does not have a URI, so it must have a valid bufferView and mimetype");
-            }
-
-            Ref<Buffer> buffer = this->bufferView->buffer;
-
-            this->mDataLength = this->bufferView->byteLength;
-            // maybe this memcpy could be avoided if aiTexture does not delete[] pcData at destruction.
-
-            this->mData.reset(new uint8_t[this->mDataLength]);
-            memcpy(this->mData.get(), buffer->GetPointer() + this->bufferView->byteOffset, this->mDataLength);
-        } else {
-            throw DeadlyImportError("GLTF2: ", getContextForErrorMessages(id, name), " should have either a URI of a bufferView and mimetype");
-        }
-    }
-}
-
-inline uint8_t *Image::StealData() {
-    mDataLength = 0;
-    return mData.release();
-}
-
-// Never take over the ownership of data whenever binary or not
-inline void Image::SetData(uint8_t *data, size_t length, Asset &r) {
-    Ref<Buffer> b = r.GetBodyBuffer();
-    if (b) { // binary file: append to body
-        std::string bvId = r.FindUniqueID(this->id, "imgdata");
-        bufferView = r.bufferViews.Create(bvId);
-
-        bufferView->buffer = b;
-        bufferView->byteLength = length;
-        bufferView->byteOffset = b->AppendData(data, length);
-    } else { // text file: will be stored as a data uri
-        uint8_t *temp = new uint8_t[length];
-        memcpy(temp, data, length);
-        this->mData.reset(temp);
-        this->mDataLength = length;
-    }
-}
-
-inline void Sampler::Read(Value &obj, Asset & /*r*/) {
-    SetDefaults();
-
-    ReadMember(obj, "name", name);
-    ReadMember(obj, "magFilter", magFilter);
-    ReadMember(obj, "minFilter", minFilter);
-    ReadMember(obj, "wrapS", wrapS);
-    ReadMember(obj, "wrapT", wrapT);
-}
-
-inline void Sampler::SetDefaults() {
-    //only wrapping modes have defaults
-    wrapS = SamplerWrap::Repeat;
-    wrapT = SamplerWrap::Repeat;
-    magFilter = SamplerMagFilter::UNSET;
-    minFilter = SamplerMinFilter::UNSET;
-}
-
-inline void Texture::Read(Value &obj, Asset &r) {
-    if (Value *sourceVal = FindUInt(obj, "source")) {
-        source = r.images.Retrieve(sourceVal->GetUint());
-    }
-
-    if (Value *samplerVal = FindUInt(obj, "sampler")) {
-        sampler = r.samplers.Retrieve(samplerVal->GetUint());
-    }
-}
-
-void Material::SetTextureProperties(Asset &r, Value *prop, TextureInfo &out) {
-    if (r.extensionsUsed.KHR_texture_transform) {
-        if (Value *pKHR_texture_transform = FindExtension(*prop, "KHR_texture_transform")) {
-            out.textureTransformSupported = true;
-            if (Value *array = FindArray(*pKHR_texture_transform, "offset")) {
-                out.TextureTransformExt_t.offset[0] = (*array)[0].GetFloat();
-                out.TextureTransformExt_t.offset[1] = (*array)[1].GetFloat();
-            } else {
-                out.TextureTransformExt_t.offset[0] = 0;
-                out.TextureTransformExt_t.offset[1] = 0;
-            }
-
-            if (!ReadMember(*pKHR_texture_transform, "rotation", out.TextureTransformExt_t.rotation)) {
-                out.TextureTransformExt_t.rotation = 0;
-            }
-
-            if (Value *array = FindArray(*pKHR_texture_transform, "scale")) {
-                out.TextureTransformExt_t.scale[0] = (*array)[0].GetFloat();
-                out.TextureTransformExt_t.scale[1] = (*array)[1].GetFloat();
-            } else {
-                out.TextureTransformExt_t.scale[0] = 1;
-                out.TextureTransformExt_t.scale[1] = 1;
-            }
-        }
-    }
-
-    if (Value *indexProp = FindUInt(*prop, "index")) {
-        out.texture = r.textures.Retrieve(indexProp->GetUint());
-    }
-
-    if (Value *texcoord = FindUInt(*prop, "texCoord")) {
-        out.texCoord = texcoord->GetUint();
-    }
-}
-
-inline void Material::ReadTextureProperty(Asset &r, Value &vals, const char *propName, TextureInfo &out) {
-    if (Value *prop = FindMember(vals, propName)) {
-        SetTextureProperties(r, prop, out);
-    }
-}
-
-inline void Material::ReadTextureProperty(Asset &r, Value &vals, const char *propName, NormalTextureInfo &out) {
-    if (Value *prop = FindMember(vals, propName)) {
-        SetTextureProperties(r, prop, out);
-
-        if (Value *scale = FindNumber(*prop, "scale")) {
-            out.scale = static_cast<float>(scale->GetDouble());
-        }
-    }
-}
-
-inline void Material::ReadTextureProperty(Asset &r, Value &vals, const char *propName, OcclusionTextureInfo &out) {
-    if (Value *prop = FindMember(vals, propName)) {
-        SetTextureProperties(r, prop, out);
-
-        if (Value *strength = FindNumber(*prop, "strength")) {
-            out.strength = static_cast<float>(strength->GetDouble());
-        }
-    }
-}
-
-inline void Material::Read(Value &material, Asset &r) {
-    SetDefaults();
-
-    if (Value *curPbrMetallicRoughness = FindObject(material, "pbrMetallicRoughness")) {
-        ReadMember(*curPbrMetallicRoughness, "baseColorFactor", this->pbrMetallicRoughness.baseColorFactor);
-        ReadTextureProperty(r, *curPbrMetallicRoughness, "baseColorTexture", this->pbrMetallicRoughness.baseColorTexture);
-        ReadTextureProperty(r, *curPbrMetallicRoughness, "metallicRoughnessTexture", this->pbrMetallicRoughness.metallicRoughnessTexture);
-        ReadMember(*curPbrMetallicRoughness, "metallicFactor", this->pbrMetallicRoughness.metallicFactor);
-        ReadMember(*curPbrMetallicRoughness, "roughnessFactor", this->pbrMetallicRoughness.roughnessFactor);
-    }
-
-    ReadTextureProperty(r, material, "normalTexture", this->normalTexture);
-    ReadTextureProperty(r, material, "occlusionTexture", this->occlusionTexture);
-    ReadTextureProperty(r, material, "emissiveTexture", this->emissiveTexture);
-    ReadMember(material, "emissiveFactor", this->emissiveFactor);
-
-    ReadMember(material, "doubleSided", this->doubleSided);
-    ReadMember(material, "alphaMode", this->alphaMode);
-    ReadMember(material, "alphaCutoff", this->alphaCutoff);
-
-    if (Value *extensions = FindObject(material, "extensions")) {
-        if (r.extensionsUsed.KHR_materials_pbrSpecularGlossiness) {
-            if (Value *curPbrSpecularGlossiness = FindObject(*extensions, "KHR_materials_pbrSpecularGlossiness")) {
-                PbrSpecularGlossiness pbrSG;
-
-                ReadMember(*curPbrSpecularGlossiness, "diffuseFactor", pbrSG.diffuseFactor);
-                ReadTextureProperty(r, *curPbrSpecularGlossiness, "diffuseTexture", pbrSG.diffuseTexture);
-                ReadTextureProperty(r, *curPbrSpecularGlossiness, "specularGlossinessTexture", pbrSG.specularGlossinessTexture);
-                ReadMember(*curPbrSpecularGlossiness, "specularFactor", pbrSG.specularFactor);
-                ReadMember(*curPbrSpecularGlossiness, "glossinessFactor", pbrSG.glossinessFactor);
-
-                this->pbrSpecularGlossiness = Nullable<PbrSpecularGlossiness>(pbrSG);
-            }
-        }
-
-        // Extension KHR_texture_transform is handled in ReadTextureProperty
-
-        if (r.extensionsUsed.KHR_materials_sheen) {
-            if (Value *curMaterialSheen = FindObject(*extensions, "KHR_materials_sheen")) {
-                MaterialSheen sheen;
-
-                ReadMember(*curMaterialSheen, "sheenColorFactor", sheen.sheenColorFactor);
-                ReadTextureProperty(r, *curMaterialSheen, "sheenColorTexture", sheen.sheenColorTexture);
-                ReadMember(*curMaterialSheen, "sheenRoughnessFactor", sheen.sheenRoughnessFactor);
-                ReadTextureProperty(r, *curMaterialSheen, "sheenRoughnessTexture", sheen.sheenRoughnessTexture);
-
-                this->materialSheen = Nullable<MaterialSheen>(sheen);
-            }
-        }
-
-        if (r.extensionsUsed.KHR_materials_clearcoat) {
-            if (Value *curMaterialClearcoat = FindObject(*extensions, "KHR_materials_clearcoat")) {
-                MaterialClearcoat clearcoat;
-
-                ReadMember(*curMaterialClearcoat, "clearcoatFactor", clearcoat.clearcoatFactor);
-                ReadTextureProperty(r, *curMaterialClearcoat, "clearcoatTexture", clearcoat.clearcoatTexture);
-                ReadMember(*curMaterialClearcoat, "clearcoatRoughnessFactor", clearcoat.clearcoatRoughnessFactor);
-                ReadTextureProperty(r, *curMaterialClearcoat, "clearcoatRoughnessTexture", clearcoat.clearcoatRoughnessTexture);
-                ReadTextureProperty(r, *curMaterialClearcoat, "clearcoatNormalTexture", clearcoat.clearcoatNormalTexture);
-
-                this->materialClearcoat = Nullable<MaterialClearcoat>(clearcoat);
-            }
-        }
-
-        if (r.extensionsUsed.KHR_materials_transmission) {
-            if (Value *curMaterialTransmission = FindObject(*extensions, "KHR_materials_transmission")) {
-                MaterialTransmission transmission;
-
-                ReadMember(*curMaterialTransmission, "transmissionFactor", transmission.transmissionFactor);
-                ReadTextureProperty(r, *curMaterialTransmission, "transmissionTexture", transmission.transmissionTexture);
-
-                this->materialTransmission = Nullable<MaterialTransmission>(transmission);
-            }
-        }
-
-        if (r.extensionsUsed.KHR_materials_volume) {
-            if (Value *curMaterialVolume = FindObject(*extensions, "KHR_materials_volume")) {
-                MaterialVolume volume;
-
-                ReadMember(*curMaterialVolume, "thicknessFactor", volume.thicknessFactor);
-                ReadTextureProperty(r, *curMaterialVolume, "thicknessTexture", volume.thicknessTexture);
-                ReadMember(*curMaterialVolume, "attenuationDistance", volume.attenuationDistance);
-                ReadMember(*curMaterialVolume, "attenuationColor", volume.attenuationColor);
-
-                this->materialVolume = Nullable<MaterialVolume>(volume);
-            }
-        }
-
-        if (r.extensionsUsed.KHR_materials_ior) {
-            if (Value *curMaterialIOR = FindObject(*extensions, "KHR_materials_ior")) {
-                MaterialIOR ior;
-
-                ReadMember(*curMaterialIOR, "ior", ior.ior);
-
-                this->materialIOR = Nullable<MaterialIOR>(ior);
-            }
-        }
-
-        unlit = nullptr != FindObject(*extensions, "KHR_materials_unlit");
-    }
-}
-
-inline void Material::SetDefaults() {
-    //pbr materials
-    SetVector(pbrMetallicRoughness.baseColorFactor, defaultBaseColor);
-    pbrMetallicRoughness.metallicFactor = 1.0f;
-    pbrMetallicRoughness.roughnessFactor = 1.0f;
-
-    SetVector(emissiveFactor, defaultEmissiveFactor);
-    alphaMode = "OPAQUE";
-    alphaCutoff = 0.5f;
-    doubleSided = false;
-    unlit = false;
-}
-
-inline void PbrSpecularGlossiness::SetDefaults() {
-    //pbrSpecularGlossiness properties
-    SetVector(diffuseFactor, defaultDiffuseFactor);
-    SetVector(specularFactor, defaultSpecularFactor);
-    glossinessFactor = 1.0f;
-}
-
-inline void MaterialSheen::SetDefaults() {
-    //KHR_materials_sheen properties
-    SetVector(sheenColorFactor, defaultSheenFactor);
-    sheenRoughnessFactor = 0.f;
-}
-
-inline void MaterialVolume::SetDefaults() {
-    //KHR_materials_volume properties
-    thicknessFactor = 0.f;
-    attenuationDistance = INFINITY;
-    SetVector(attenuationColor, defaultAttenuationColor);
-}
-
-inline void MaterialIOR::SetDefaults() {
-    //KHR_materials_ior properties
-    ior = 1.5f;
-}
-
-inline void Mesh::Read(Value &pJSON_Object, Asset &pAsset_Root) {
-    Value *curName = FindMember(pJSON_Object, "name");
-    if (nullptr != curName && curName->IsString()) {
-        name = curName->GetString();
-    }
-
-    /****************** Mesh primitives ******************/
-    Value *curPrimitives = FindArray(pJSON_Object, "primitives");
-    if (nullptr != curPrimitives) {
-        this->primitives.resize(curPrimitives->Size());
-        for (unsigned int i = 0; i < curPrimitives->Size(); ++i) {
-            Value &primitive = (*curPrimitives)[i];
-
-            Primitive &prim = this->primitives[i];
-            prim.mode = MemberOrDefault(primitive, "mode", PrimitiveMode_TRIANGLES);
-
-            if (Value *indices = FindUInt(primitive, "indices")) {
-                prim.indices = pAsset_Root.accessors.Retrieve(indices->GetUint());
-            }
-
-            if (Value *material = FindUInt(primitive, "material")) {
-                prim.material = pAsset_Root.materials.Retrieve(material->GetUint());
-            }
-
-            if (Value *attrs = FindObject(primitive, "attributes")) {
-                for (Value::MemberIterator it = attrs->MemberBegin(); it != attrs->MemberEnd(); ++it) {
-                    if (!it->value.IsUint()) continue;
-                    const char *attr = it->name.GetString();
-                    // Valid attribute semantics include POSITION, NORMAL, TANGENT, TEXCOORD, COLOR, JOINT, JOINTMATRIX,
-                    // and WEIGHT.Attribute semantics can be of the form[semantic]_[set_index], e.g., TEXCOORD_0, TEXCOORD_1, etc.
-
-                    int undPos = 0;
-                    Mesh::AccessorList *vec = nullptr;
-                    if (GetAttribVector(prim, attr, vec, undPos)) {
-                        size_t idx = (attr[undPos] == '_') ? atoi(attr + undPos + 1) : 0;
-                        if ((*vec).size() != idx) {
-                            throw DeadlyImportError("GLTF: Invalid attribute in mesh: ", name, " primitive: ", i, "attrib: ", attr,
-                                    ". All indices for indexed attribute semantics must start with 0 and be continuous positive integers: TEXCOORD_0, TEXCOORD_1, etc.");
-                        }
-                        (*vec).resize(idx + 1);
-                        (*vec)[idx] = pAsset_Root.accessors.Retrieve(it->value.GetUint());
-                    }
-                }
-            }
-
-#ifdef ASSIMP_ENABLE_DRACO
-            // KHR_draco_mesh_compression spec: Draco can only be used for glTF Triangles or Triangle Strips
-            if (pAsset_Root.extensionsUsed.KHR_draco_mesh_compression && (prim.mode == PrimitiveMode_TRIANGLES || prim.mode == PrimitiveMode_TRIANGLE_STRIP)) {
-                // Look for draco mesh compression extension and bufferView
-                // Skip if any missing
-                if (Value *dracoExt = FindExtension(primitive, "KHR_draco_mesh_compression")) {
-                    if (Value *bufView = FindUInt(*dracoExt, "bufferView")) {
-                        // Attempt to load indices and attributes using draco compression
-                        auto bufferView = pAsset_Root.bufferViews.Retrieve(bufView->GetUint());
-                        // Attempt to perform the draco decode on the buffer data
-                        const char *bufferViewData = reinterpret_cast<const char *>(bufferView->buffer->GetPointer() + bufferView->byteOffset);
-                        draco::DecoderBuffer decoderBuffer;
-                        decoderBuffer.Init(bufferViewData, bufferView->byteLength);
-                        draco::Decoder decoder;
-                        auto decodeResult = decoder.DecodeMeshFromBuffer(&decoderBuffer);
-                        if (!decodeResult.ok()) {
-                            // A corrupt Draco isn't actually fatal if the primitive data is also provided in a standard buffer, but does anyone do that?
-                            throw DeadlyImportError("GLTF: Invalid Draco mesh compression in mesh: ", name, " primitive: ", i, ": ", decodeResult.status().error_msg_string());
-                        }
-
-                        // Now we have a draco mesh
-                        const std::unique_ptr<draco::Mesh> &pDracoMesh = decodeResult.value();
-
-                        // Redirect the accessors to the decoded data
-
-                        // Indices
-                        SetDecodedIndexBuffer_Draco(*pDracoMesh, prim);
-
-                        // Vertex attributes
-                        if (Value *attrs = FindObject(*dracoExt, "attributes")) {
-                            for (Value::MemberIterator it = attrs->MemberBegin(); it != attrs->MemberEnd(); ++it) {
-                                if (!it->value.IsUint()) continue;
-                                const char *attr = it->name.GetString();
-
-                                int undPos = 0;
-                                Mesh::AccessorList *vec = nullptr;
-                                if (GetAttribVector(prim, attr, vec, undPos)) {
-                                    size_t idx = (attr[undPos] == '_') ? atoi(attr + undPos + 1) : 0;
-                                    if (idx >= (*vec).size()) {
-                                        throw DeadlyImportError("GLTF: Invalid draco attribute in mesh: ", name, " primitive: ", i, " attrib: ", attr,
-                                                ". All indices for indexed attribute semantics must start with 0 and be continuous positive integers: TEXCOORD_0, TEXCOORD_1, etc.");
-                                    }
-
-                                    if (!(*vec)[idx]) {
-                                        throw DeadlyImportError("GLTF: Invalid draco attribute in mesh: ", name, " primitive: ", i, " attrib: ", attr,
-                                                ". All draco-encoded attributes must also define an accessor.");
-                                    }
-
-                                    Accessor &attribAccessor = *(*vec)[idx];
-                                    if (attribAccessor.count == 0)
-                                        throw DeadlyImportError("GLTF: Invalid draco attribute in mesh: ", name, " primitive: ", i, " attrib: ", attr);
-
-                                    // Redirect this accessor to the appropriate Draco vertex attribute data
-                                    const uint32_t dracoAttribId = it->value.GetUint();
-                                    SetDecodedAttributeBuffer_Draco(*pDracoMesh, dracoAttribId, attribAccessor);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-#endif
-
-            Value *targetsArray = FindArray(primitive, "targets");
-            if (nullptr != targetsArray) {
-                prim.targets.resize(targetsArray->Size());
-                for (unsigned int j = 0; j < targetsArray->Size(); ++j) {
-                    Value &target = (*targetsArray)[j];
-                    if (!target.IsObject()) {
-                        continue;
-                    }
-                    for (Value::MemberIterator it = target.MemberBegin(); it != target.MemberEnd(); ++it) {
-                        if (!it->value.IsUint()) {
-                            continue;
-                        }
-                        const char *attr = it->name.GetString();
-                        // Valid attribute semantics include POSITION, NORMAL, TANGENT
-                        int undPos = 0;
-                        Mesh::AccessorList *vec = nullptr;
-                        if (GetAttribTargetVector(prim, j, attr, vec, undPos)) {
-                            size_t idx = (attr[undPos] == '_') ? atoi(attr + undPos + 1) : 0;
-                            if ((*vec).size() <= idx) {
-                                (*vec).resize(idx + 1);
-                            }
-                            (*vec)[idx] = pAsset_Root.accessors.Retrieve(it->value.GetUint());
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    Value *curWeights = FindArray(pJSON_Object, "weights");
-    if (nullptr != curWeights) {
-        this->weights.resize(curWeights->Size());
-        for (unsigned int i = 0; i < curWeights->Size(); ++i) {
-            Value &weightValue = (*curWeights)[i];
-            if (weightValue.IsNumber()) {
-                this->weights[i] = weightValue.GetFloat();
-            }
-        }
-    }
-
-    Value *curExtras = FindObject(pJSON_Object, "extras");
-    if (nullptr != curExtras) {
-        if (Value *curTargetNames = FindArray(*curExtras, "targetNames")) {
-            this->targetNames.resize(curTargetNames->Size());
-            for (unsigned int i = 0; i < curTargetNames->Size(); ++i) {
-                Value &targetNameValue = (*curTargetNames)[i];
-                if (targetNameValue.IsString()) {
-                    this->targetNames[i] = targetNameValue.GetString();
-                }
-            }
-        }
-    }
-}
-
-inline void Camera::Read(Value &obj, Asset & /*r*/) {
-    std::string type_string = std::string(MemberOrDefault(obj, "type", "perspective"));
-    if (type_string == "orthographic") {
-        type = Camera::Orthographic;
-    } else {
-        type = Camera::Perspective;
-    }
-
-    const char *subobjId = (type == Camera::Orthographic) ? "orthographic" : "perspective";
-
-    Value *it = FindObject(obj, subobjId);
-    if (!it) throw DeadlyImportError("GLTF: Camera missing its parameters");
-
-    if (type == Camera::Perspective) {
-        cameraProperties.perspective.aspectRatio = MemberOrDefault(*it, "aspectRatio", 0.f);
-        cameraProperties.perspective.yfov = MemberOrDefault(*it, "yfov", 3.1415f / 2.f);
-        cameraProperties.perspective.zfar = MemberOrDefault(*it, "zfar", 100.f);
-        cameraProperties.perspective.znear = MemberOrDefault(*it, "znear", 0.01f);
-    } else {
-        cameraProperties.ortographic.xmag = MemberOrDefault(*it, "xmag", 1.f);
-        cameraProperties.ortographic.ymag = MemberOrDefault(*it, "ymag", 1.f);
-        cameraProperties.ortographic.zfar = MemberOrDefault(*it, "zfar", 100.f);
-        cameraProperties.ortographic.znear = MemberOrDefault(*it, "znear", 0.01f);
-    }
-}
-
-inline void Light::Read(Value &obj, Asset & /*r*/) {
-#ifndef M_PI
-    const float M_PI = 3.14159265358979323846f;
-#endif
-
-    std::string type_string;
-    ReadMember(obj, "type", type_string);
-    if (type_string == "directional")
-        type = Light::Directional;
-    else if (type_string == "point")
-        type = Light::Point;
-    else
-        type = Light::Spot;
-
-    name = MemberOrDefault(obj, "name", "");
-
-    SetVector(color, vec3{ 1.0f, 1.0f, 1.0f });
-    ReadMember(obj, "color", color);
-
-    intensity = MemberOrDefault(obj, "intensity", 1.0f);
-
-    ReadMember(obj, "range", range);
-
-    if (type == Light::Spot) {
-        Value *spot = FindObject(obj, "spot");
-        if (!spot) throw DeadlyImportError("GLTF: Light missing its spot parameters");
-        innerConeAngle = MemberOrDefault(*spot, "innerConeAngle", 0.0f);
-        outerConeAngle = MemberOrDefault(*spot, "outerConeAngle", static_cast<float>(M_PI / 4.0f));
-    }
-}
-
-inline void Node::Read(Value &obj, Asset &r) {
-    if (name.empty()) {
-        name = id;
-    }
-
-    Value *curChildren = FindArray(obj, "children");
-    if (nullptr != curChildren) {
-        this->children.reserve(curChildren->Size());
-        for (unsigned int i = 0; i < curChildren->Size(); ++i) {
-            Value &child = (*curChildren)[i];
-            if (child.IsUint()) {
-                // get/create the child node
-                Ref<Node> chn = r.nodes.Retrieve(child.GetUint());
-                if (chn) {
-                    this->children.push_back(chn);
-                }
-            }
-        }
-    }
-
-    Value *curMatrix = FindArray(obj, "matrix");
-    if (nullptr != curMatrix) {
-        ReadValue(*curMatrix, this->matrix);
-    } else {
-        ReadMember(obj, "translation", translation);
-        ReadMember(obj, "scale", scale);
-        ReadMember(obj, "rotation", rotation);
-    }
-
-    Value *curMesh = FindUInt(obj, "mesh");
-    if (nullptr != curMesh) {
-        unsigned int numMeshes = 1;
-        this->meshes.reserve(numMeshes);
-        Ref<Mesh> meshRef = r.meshes.Retrieve((*curMesh).GetUint());
-        if (meshRef) {
-            this->meshes.push_back(meshRef);
-        }
-    }
-
-    // Do not retrieve a skin here, just take a reference, to avoid infinite recursion
-    // Skins will be properly loaded later
-    Value *curSkin = FindUInt(obj, "skin");
-    if (nullptr != curSkin) {
-        this->skin = r.skins.Get(curSkin->GetUint());
-    }
-
-    Value *curCamera = FindUInt(obj, "camera");
-    if (nullptr != curCamera) {
-        this->camera = r.cameras.Retrieve(curCamera->GetUint());
-        if (this->camera) {
-            this->camera->id = this->id;
-        }
-    }
-
-    Value *curExtensions = FindObject(obj, "extensions");
-    if (nullptr != curExtensions) {
-        if (r.extensionsUsed.KHR_lights_punctual) {
-            if (Value *ext = FindObject(*curExtensions, "KHR_lights_punctual")) {
-                Value *curLight = FindUInt(*ext, "light");
-                if (nullptr != curLight) {
-                    this->light = r.lights.Retrieve(curLight->GetUint());
-                    if (this->light) {
-                        this->light->id = this->id;
-                    }
-                }
-            }
-        }
-    }
-}
-
-inline void Scene::Read(Value &obj, Asset &r) {
-    if (Value *scene_name = FindString(obj, "name")) {
-        if (scene_name->IsString()) {
-            this->name = scene_name->GetString();
-        }
-    }
-    if (Value *array = FindArray(obj, "nodes")) {
-        for (unsigned int i = 0; i < array->Size(); ++i) {
-            if (!(*array)[i].IsUint()) continue;
-            Ref<Node> node = r.nodes.Retrieve((*array)[i].GetUint());
-            if (node)
-                this->nodes.push_back(node);
-        }
-    }
-}
-
-inline void Skin::Read(Value &obj, Asset &r) {
-    if (Value *matrices = FindUInt(obj, "inverseBindMatrices")) {
-        inverseBindMatrices = r.accessors.Retrieve(matrices->GetUint());
-    }
-
-    if (Value *joints = FindArray(obj, "joints")) {
-        for (unsigned i = 0; i < joints->Size(); ++i) {
-            if (!(*joints)[i].IsUint()) continue;
-            Ref<Node> node = r.nodes.Retrieve((*joints)[i].GetUint());
-            if (node) {
-                this->jointNames.push_back(node);
-            }
-        }
-    }
-}
-
-inline void Animation::Read(Value &obj, Asset &r) {
-    Value *curSamplers = FindArray(obj, "samplers");
-    if (nullptr != curSamplers) {
-        for (unsigned i = 0; i < curSamplers->Size(); ++i) {
-            Value &sampler = (*curSamplers)[i];
-
-            Sampler s;
-            if (Value *input = FindUInt(sampler, "input")) {
-                s.input = r.accessors.Retrieve(input->GetUint());
-            }
-            if (Value *output = FindUInt(sampler, "output")) {
-                s.output = r.accessors.Retrieve(output->GetUint());
-            }
-            s.interpolation = Interpolation_LINEAR;
-            if (Value *interpolation = FindString(sampler, "interpolation")) {
-                const std::string interp = interpolation->GetString();
-                if (interp == "LINEAR") {
-                    s.interpolation = Interpolation_LINEAR;
-                } else if (interp == "STEP") {
-                    s.interpolation = Interpolation_STEP;
-                } else if (interp == "CUBICSPLINE") {
-                    s.interpolation = Interpolation_CUBICSPLINE;
-                }
-            }
-            this->samplers.push_back(s);
-        }
-    }
-
-    Value *curChannels = FindArray(obj, "channels");
-    if (nullptr != curChannels) {
-        for (unsigned i = 0; i < curChannels->Size(); ++i) {
-            Value &channel = (*curChannels)[i];
-
-            Channel c;
-            Value *curSampler = FindUInt(channel, "sampler");
-            if (nullptr != curSampler) {
-                c.sampler = curSampler->GetUint();
-            }
-
-            if (Value *target = FindObject(channel, "target")) {
-                if (Value *node = FindUInt(*target, "node")) {
-                    c.target.node = r.nodes.Retrieve(node->GetUint());
-                }
-                if (Value *path = FindString(*target, "path")) {
-                    const std::string p = path->GetString();
-                    if (p == "translation") {
-                        c.target.path = AnimationPath_TRANSLATION;
-                    } else if (p == "rotation") {
-                        c.target.path = AnimationPath_ROTATION;
-                    } else if (p == "scale") {
-                        c.target.path = AnimationPath_SCALE;
-                    } else if (p == "weights") {
-                        c.target.path = AnimationPath_WEIGHTS;
-                    }
-                }
-            }
-            this->channels.push_back(c);
-        }
-    }
-}
-
-inline void AssetMetadata::Read(Document &doc) {
-    if (Value *obj = FindObject(doc, "asset")) {
-        ReadMember(*obj, "copyright", copyright);
-        ReadMember(*obj, "generator", generator);
-
-        if (Value *versionString = FindStringInContext(*obj, "version", "\"asset\"")) {
-            version = versionString->GetString();
-        }
-        Value *curProfile = FindObjectInContext(*obj, "profile", "\"asset\"");
-        if (nullptr != curProfile) {
-            ReadMember(*curProfile, "api", this->profile.api);
-            ReadMember(*curProfile, "version", this->profile.version);
-        }
-    }
-
-    if (version.empty() || version[0] != '2') {
-        throw DeadlyImportError("GLTF: Unsupported glTF version: ", version);
-    }
-}
-
-//
-// Asset methods implementation
-//
-
-inline void Asset::ReadBinaryHeader(IOStream &stream, std::vector<char> &sceneData) {
-    ASSIMP_LOG_DEBUG("Reading GLTF2 binary");
-    GLB_Header header;
-    if (stream.Read(&header, sizeof(header), 1) != 1) {
-        throw DeadlyImportError("GLTF: Unable to read the file header");
-    }
-
-    if (strncmp((char *)header.magic, AI_GLB_MAGIC_NUMBER, sizeof(header.magic)) != 0) {
-        throw DeadlyImportError("GLTF: Invalid binary glTF file");
-    }
-
-    AI_SWAP4(header.version);
-    asset.version = ai_to_string(header.version);
-    if (header.version != 2) {
-        throw DeadlyImportError("GLTF: Unsupported binary glTF version");
-    }
-
-    GLB_Chunk chunk;
-    if (stream.Read(&chunk, sizeof(chunk), 1) != 1) {
-        throw DeadlyImportError("GLTF: Unable to read JSON chunk");
-    }
-
-    AI_SWAP4(chunk.chunkLength);
-    AI_SWAP4(chunk.chunkType);
-
-    if (chunk.chunkType != ChunkType_JSON) {
-        throw DeadlyImportError("GLTF: JSON chunk missing");
-    }
-
-    // read the scene data, ensure null termination
-    static_assert(std::numeric_limits<uint32_t>::max() <= std::numeric_limits<size_t>::max(), "size_t must be at least 32bits");
-    mSceneLength = chunk.chunkLength; // Can't be larger than 4GB (max. uint32_t)
-    sceneData.resize(mSceneLength + 1);
-    sceneData[mSceneLength] = '\0';
-
-    if (stream.Read(&sceneData[0], 1, mSceneLength) != mSceneLength) {
-        throw DeadlyImportError("GLTF: Could not read the file contents");
-    }
-
-    uint32_t padding = ((chunk.chunkLength + 3) & ~3) - chunk.chunkLength;
-    if (padding > 0) {
-        stream.Seek(padding, aiOrigin_CUR);
-    }
-
-    AI_SWAP4(header.length);
-    mBodyOffset = 12 + 8 + chunk.chunkLength + padding + 8;
-    if (header.length >= mBodyOffset) {
-        if (stream.Read(&chunk, sizeof(chunk), 1) != 1) {
-            throw DeadlyImportError("GLTF: Unable to read BIN chunk");
-        }
-
-        AI_SWAP4(chunk.chunkLength);
-        AI_SWAP4(chunk.chunkType);
-
-        if (chunk.chunkType != ChunkType_BIN) {
-            throw DeadlyImportError("GLTF: BIN chunk missing");
-        }
-
-        mBodyLength = chunk.chunkLength;
-    } else {
-        mBodyOffset = mBodyLength = 0;
-    }
-}
-
-inline rapidjson::Document Asset::ReadDocument(IOStream &stream, bool isBinary, std::vector<char> &sceneData) {
-    ASSIMP_LOG_DEBUG("Loading GLTF2 asset");
-
-    // is binary? then read the header
-    if (isBinary) {
-        SetAsBinary(); // also creates the body buffer
-        ReadBinaryHeader(stream, sceneData);
-    } else {
-        mSceneLength = stream.FileSize();
-        mBodyLength = 0;
-
-        // Binary format only supports up to 4GB of JSON, use that as a maximum
-        if (mSceneLength >= std::numeric_limits<uint32_t>::max()) {
-            throw DeadlyImportError("GLTF: JSON size greater than 4GB");
-        }
-
-        // read the scene data, ensure null termination
-        sceneData.resize(mSceneLength + 1);
-        sceneData[mSceneLength] = '\0';
-
-        if (stream.Read(&sceneData[0], 1, mSceneLength) != mSceneLength) {
-            throw DeadlyImportError("GLTF: Could not read the file contents");
-        }
-    }
-
-    // Smallest legal JSON file is "{}" Smallest loadable glTF file is larger than that but catch it later
-    if (mSceneLength < 2) {
-        throw DeadlyImportError("GLTF: No JSON file contents");
-    }
-
-    // parse the JSON document
-    ASSIMP_LOG_DEBUG("Parsing GLTF2 JSON");
-    Document doc;
-    doc.ParseInsitu(&sceneData[0]);
-
-    if (doc.HasParseError()) {
-        char buffer[32];
-        ai_snprintf(buffer, 32, "%d", static_cast<int>(doc.GetErrorOffset()));
-        throw DeadlyImportError("GLTF: JSON parse error, offset ", buffer, ": ", GetParseError_En(doc.GetParseError()));
-    }
-
-    if (!doc.IsObject()) {
-        throw DeadlyImportError("GLTF: JSON document root must be a JSON object");
-    }
-
-    return doc;
-}
-
-inline void Asset::Load(const std::string &pFile, bool isBinary)
-{
-    mCurrentAssetDir.clear();
-    if (0 != strncmp(pFile.c_str(), AI_MEMORYIO_MAGIC_FILENAME, AI_MEMORYIO_MAGIC_FILENAME_LENGTH)) {
-        mCurrentAssetDir = glTFCommon::getCurrentAssetDir(pFile);
-    }
-
-    shared_ptr<IOStream> stream(OpenFile(pFile.c_str(), "rb", true));
-    if (!stream) {
-        throw DeadlyImportError("GLTF: Could not open file for reading");
-    }
-
-    std::vector<char> sceneData;
-    rapidjson::Document doc = ReadDocument(*stream, isBinary, sceneData);
-
-    // If a schemaDocumentProvider is available, see if the glTF schema is present. 
-    // If so, use it to validate the document.
-    if (mSchemaDocumentProvider) {
-        if (const rapidjson::SchemaDocument *gltfSchema = mSchemaDocumentProvider->GetRemoteDocument("glTF.schema.json", 16)) {
-            // The schemas are found here: https://github.com/KhronosGroup/glTF/tree/main/specification/2.0/schema
-            rapidjson::SchemaValidator validator(*gltfSchema);
-            if (!doc.Accept(validator)) {
-                rapidjson::StringBuffer pathBuffer;
-                validator.GetInvalidSchemaPointer().StringifyUriFragment(pathBuffer);
-                rapidjson::StringBuffer argumentBuffer;
-                validator.GetInvalidDocumentPointer().StringifyUriFragment(argumentBuffer);
-                throw DeadlyImportError("GLTF: The JSON document did not satisfy the glTF2 schema. Schema keyword: ", validator.GetInvalidSchemaKeyword(), ", document path: ", pathBuffer.GetString(), ", argument: ", argumentBuffer.GetString());
-            }
-        }
-    }
-
-    // Fill the buffer instance for the current file embedded contents
-    if (mBodyLength > 0) {
-        if (!mBodyBuffer->LoadFromStream(*stream, mBodyLength, mBodyOffset)) {
-            throw DeadlyImportError("GLTF: Unable to read gltf file");
-        }
-    }
-
-    // Load the metadata
-    asset.Read(doc);
-    ReadExtensionsUsed(doc);
-    ReadExtensionsRequired(doc);
-
-#ifndef ASSIMP_ENABLE_DRACO
-    // Is Draco required?
-    if (extensionsRequired.KHR_draco_mesh_compression) {
-        throw DeadlyImportError("GLTF: Draco mesh compression not supported.");
-    }
-#endif
-
-    // Prepare the dictionaries
-    for (size_t i = 0; i < mDicts.size(); ++i) {
-        mDicts[i]->AttachToDocument(doc);
-    }
-
-    // Read the "scene" property, which specifies which scene to load
-    // and recursively load everything referenced by it
-    unsigned int sceneIndex = 0;
-    Value *curScene = FindUInt(doc, "scene");
-    if (nullptr != curScene) {
-        sceneIndex = curScene->GetUint();
-    }
-
-    if (Value *scenesArray = FindArray(doc, "scenes")) {
-        if (sceneIndex < scenesArray->Size()) {
-            this->scene = scenes.Retrieve(sceneIndex);
-        }
-    }
-
-    if (Value *skinsArray = FindArray(doc, "skins")) {
-        for (unsigned int i = 0; i < skinsArray->Size(); ++i) {
-            skins.Retrieve(i);
-        }
-    }
-
-    if (Value *animsArray = FindArray(doc, "animations")) {
-        for (unsigned int i = 0; i < animsArray->Size(); ++i) {
-            animations.Retrieve(i);
-        }
-    }
-
-    // Clean up
-    for (size_t i = 0; i < mDicts.size(); ++i) {
-        mDicts[i]->DetachFromDocument();
-    }
-}
-
-inline bool Asset::CanRead(const std::string &pFile, bool isBinary) {
-    try {
-        shared_ptr<IOStream> stream(OpenFile(pFile.c_str(), "rb", true));
-        if (!stream) {
-            return false;
-        }
-        std::vector<char> sceneData;
-        rapidjson::Document doc = ReadDocument(*stream, isBinary, sceneData);
-        asset.Read(doc);
-    } catch (...) {
-        return false;
-    }
-    return true;
-}
-
-inline void Asset::SetAsBinary() {
-    if (!mBodyBuffer) {
-        mBodyBuffer = buffers.Create("binary_glTF");
-        mBodyBuffer->MarkAsSpecial();
-    }
-}
-
-// As required extensions are only a concept in glTF 2.0, this is here
-// instead of glTFCommon.h
-#define CHECK_REQUIRED_EXT(EXT) \
-    if (exts.find(#EXT) != exts.end()) extensionsRequired.EXT = true;
-
-inline void Asset::ReadExtensionsRequired(Document &doc) {
-    Value *extsRequired = FindArray(doc, "extensionsRequired");
-    if (nullptr == extsRequired) {
-        return;
-    }
-
-    std::gltf_unordered_map<std::string, bool> exts;
-    for (unsigned int i = 0; i < extsRequired->Size(); ++i) {
-        if ((*extsRequired)[i].IsString()) {
-            exts[(*extsRequired)[i].GetString()] = true;
-        }
-    }
-
-    CHECK_REQUIRED_EXT(KHR_draco_mesh_compression);
-
-#undef CHECK_REQUIRED_EXT
-}
-
-inline void Asset::ReadExtensionsUsed(Document &doc) {
-    Value *extsUsed = FindArray(doc, "extensionsUsed");
-    if (!extsUsed) return;
-
-    std::gltf_unordered_map<std::string, bool> exts;
-
-    for (unsigned int i = 0; i < extsUsed->Size(); ++i) {
-        if ((*extsUsed)[i].IsString()) {
-            exts[(*extsUsed)[i].GetString()] = true;
-        }
-    }
-
-    CHECK_EXT(KHR_materials_pbrSpecularGlossiness);
-    CHECK_EXT(KHR_materials_unlit);
-    CHECK_EXT(KHR_lights_punctual);
-    CHECK_EXT(KHR_texture_transform);
-    CHECK_EXT(KHR_materials_sheen);
-    CHECK_EXT(KHR_materials_clearcoat);
-    CHECK_EXT(KHR_materials_transmission);
-    CHECK_EXT(KHR_materials_volume);
-    CHECK_EXT(KHR_materials_ior);
-    CHECK_EXT(KHR_draco_mesh_compression);
-    CHECK_EXT(KHR_texture_basisu);
-
-#undef CHECK_EXT
-}
-
-inline IOStream *Asset::OpenFile(const std::string &path, const char *mode, bool /*absolute*/) {
-#ifdef ASSIMP_API
-    return mIOSystem->Open(path, mode);
-#else
-    if (path.size() < 2) return nullptr;
-    if (!absolute && path[1] != ':' && path[0] != '/') { // relative?
-        path = mCurrentAssetDir + path;
-    }
-    FILE *f = fopen(path.c_str(), mode);
-    return f ? new IOStream(f) : nullptr;
-#endif
-}
-
-inline std::string Asset::FindUniqueID(const std::string &str, const char *suffix) {
-    std::string id = str;
-
-    if (!id.empty()) {
-        if (mUsedIds.find(id) == mUsedIds.end())
-            return id;
-
-        id += "_";
-    }
-
-    id += suffix;
-
-    Asset::IdMap::iterator it = mUsedIds.find(id);
-    if (it == mUsedIds.end()) {
-        return id;
-    }
-
-    std::vector<char> buffer;
-    buffer.resize(id.size() + 16);
-    int offset = ai_snprintf(buffer.data(), buffer.size(), "%s_", id.c_str());
-    for (int i = 0; it != mUsedIds.end(); ++i) {
-        ai_snprintf(buffer.data() + offset, buffer.size() - offset, "%d", i);
-        id = buffer.data();
-        it = mUsedIds.find(id);
-    }
-
-    return id;
-}
-
-#if _MSC_VER
-#   pragma warning(pop)
-#endif // _MSC_VER
-
-} // namespace glTF2
diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2AssetWriter.h b/libs/assimp/code/AssetLib/glTF2/glTF2AssetWriter.h
deleted file mode 100644
index 089a158..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2AssetWriter.h
+++ /dev/null
@@ -1,101 +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 glTFWriter.h
- * Declares a class to write gltf/glb files
- *
- * glTF Extensions Support:
- *   KHR_materials_pbrSpecularGlossiness: full
- *   KHR_materials_unlit: full
- *   KHR_materials_sheen: full
- *   KHR_materials_clearcoat: full
- *   KHR_materials_transmission: full
- *   KHR_materials_volume: full
- *   KHR_materials_ior: full
- */
-#ifndef GLTF2ASSETWRITER_H_INC
-#define GLTF2ASSETWRITER_H_INC
-
-#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
-
-#include "glTF2Asset.h"
-
-namespace glTF2
-{
-
-using rapidjson::MemoryPoolAllocator;
-
-class AssetWriter
-{
-    template<class T>
-    friend void WriteLazyDict(LazyDict<T>& d, AssetWriter& w);
-
-private:
-
-    void WriteBinaryData(IOStream* outfile, size_t sceneLength);
-
-    void WriteMetadata();
-    void WriteExtensionsUsed();
-
-    template<class T>
-    void WriteObjects(LazyDict<T>& d);
-
-public:
-    Document mDoc;
-    Asset& mAsset;
-
-    MemoryPoolAllocator<>& mAl;
-
-    AssetWriter(Asset& asset);
-
-    void WriteFile(const char* path);
-    void WriteGLBFile(const char* path);
-};
-
-}
-
-// Include the implementation of the methods
-#include "glTF2AssetWriter.inl"
-
-#endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
-
-#endif // GLTF2ASSETWRITER_H_INC
diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2AssetWriter.inl b/libs/assimp/code/AssetLib/glTF2/glTF2AssetWriter.inl
deleted file mode 100644
index 0be1395..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2AssetWriter.inl
+++ /dev/null
@@ -1,1015 +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.
-
-----------------------------------------------------------------------
-*/
-
-#include <assimp/Base64.hpp>
-#include <rapidjson/stringbuffer.h>
-#include <rapidjson/writer.h>
-#include <rapidjson/prettywriter.h>
-
-namespace glTF2 {
-
-    using rapidjson::StringBuffer;
-    using rapidjson::PrettyWriter;
-    using rapidjson::Writer;
-    using rapidjson::StringRef;
-    using rapidjson::StringRef;
-
-    namespace {
-
-        template<typename T, size_t N>
-        inline Value& MakeValue(Value& val, T(&r)[N], MemoryPoolAllocator<>& al) {
-            val.SetArray();
-            val.Reserve(N, al);
-            for (decltype(N) i = 0; i < N; ++i) {
-                val.PushBack(r[i], al);
-            }
-            return val;
-        }
-
-        template<typename T>
-        inline Value& MakeValue(Value& val, const std::vector<T> & r, MemoryPoolAllocator<>& al) {
-            val.SetArray();
-            val.Reserve(static_cast<rapidjson::SizeType>(r.size()), al);
-            for (unsigned int i = 0; i < r.size(); ++i) {
-                val.PushBack(r[i], al);
-            }
-            return val;
-        }
-
-        template<typename C, typename T>
-        inline Value& MakeValueCast(Value& val, const std::vector<T> & r, MemoryPoolAllocator<>& al) {
-            val.SetArray();
-            val.Reserve(static_cast<rapidjson::SizeType>(r.size()), al);
-            for (unsigned int i = 0; i < r.size(); ++i) {
-                val.PushBack(static_cast<C>(r[i]), al);
-            }
-            return val;
-        }
-
-        template<typename T>
-        inline Value& MakeValue(Value& val, T r, MemoryPoolAllocator<>& /*al*/) {
-            val.Set(r);
-
-            return val;
-        }
-
-        template<class T>
-        inline void AddRefsVector(Value& obj, const char* fieldId, std::vector< Ref<T> >& v, MemoryPoolAllocator<>& al) {
-            if (v.empty()) return;
-            Value lst;
-            lst.SetArray();
-            lst.Reserve(unsigned(v.size()), al);
-            for (size_t i = 0; i < v.size(); ++i) {
-                lst.PushBack(v[i]->index, al);
-            }
-            obj.AddMember(StringRef(fieldId), lst, al);
-        }
-
-
-    }
-
-    inline void Write(Value& obj, Accessor& a, AssetWriter& w)
-    {
-        if (a.bufferView) {
-            obj.AddMember("bufferView", a.bufferView->index, w.mAl);
-            obj.AddMember("byteOffset", (unsigned int)a.byteOffset, w.mAl);
-        }
-        obj.AddMember("componentType", int(a.componentType), w.mAl);
-        obj.AddMember("count", (unsigned int)a.count, w.mAl);
-        obj.AddMember("type", StringRef(AttribType::ToString(a.type)), w.mAl);
-        Value vTmpMax, vTmpMin;
-        if (a.componentType == ComponentType_FLOAT) {
-            obj.AddMember("max", MakeValue(vTmpMax, a.max, w.mAl), w.mAl);
-            obj.AddMember("min", MakeValue(vTmpMin, a.min, w.mAl), w.mAl);
-        } else {
-            obj.AddMember("max", MakeValueCast<int64_t>(vTmpMax, a.max, w.mAl), w.mAl);
-            obj.AddMember("min", MakeValueCast<int64_t>(vTmpMin, a.min, w.mAl), w.mAl);
-        }
-
-        if (a.sparse) {
-            Value sparseValue;
-            sparseValue.SetObject();
-
-            //count
-            sparseValue.AddMember("count", (unsigned int)a.sparse->count, w.mAl);
-
-            //indices
-            Value indices;
-            indices.SetObject();
-            indices.AddMember("bufferView", a.sparse->indices->index, w.mAl);
-            indices.AddMember("byteOffset", (unsigned int)a.sparse->indicesByteOffset, w.mAl);
-            indices.AddMember("componentType", int(a.sparse->indicesType), w.mAl);
-            sparseValue.AddMember("indices", indices, w.mAl);
-
-            //values
-            Value values;
-            values.SetObject();
-            values.AddMember("bufferView", a.sparse->values->index, w.mAl);
-            values.AddMember("byteOffset", (unsigned int)a.sparse->valuesByteOffset, w.mAl);
-            sparseValue.AddMember("values", values, w.mAl);
-
-            obj.AddMember("sparse", sparseValue, w.mAl);
-        }
-    }
-
-    inline void Write(Value& obj, Animation& a, AssetWriter& w)
-    {
-        /****************** Channels *******************/
-        Value channels;
-        channels.SetArray();
-        channels.Reserve(unsigned(a.channels.size()), w.mAl);
-
-        for (size_t i = 0; i < unsigned(a.channels.size()); ++i) {
-            Animation::Channel& c = a.channels[i];
-            Value valChannel;
-            valChannel.SetObject();
-            {
-                valChannel.AddMember("sampler", c.sampler, w.mAl);
-
-                Value valTarget;
-                valTarget.SetObject();
-                {
-                    valTarget.AddMember("node", c.target.node->index, w.mAl);
-                    switch (c.target.path) {
-                        case AnimationPath_TRANSLATION:
-                            valTarget.AddMember("path", "translation", w.mAl);
-                            break;
-                        case AnimationPath_ROTATION:
-                            valTarget.AddMember("path", "rotation", w.mAl);
-                            break;
-                        case AnimationPath_SCALE:
-                            valTarget.AddMember("path", "scale", w.mAl);
-                            break;
-                        case AnimationPath_WEIGHTS:
-                            valTarget.AddMember("path", "weights", w.mAl);
-                            break;
-                    }
-                }
-                valChannel.AddMember("target", valTarget, w.mAl);
-            }
-            channels.PushBack(valChannel, w.mAl);
-        }
-        obj.AddMember("channels", channels, w.mAl);
-
-        /****************** Samplers *******************/
-        Value valSamplers;
-        valSamplers.SetArray();
-
-        for (size_t i = 0; i < unsigned(a.samplers.size()); ++i) {
-            Animation::Sampler& s = a.samplers[i];
-            Value valSampler;
-            valSampler.SetObject();
-            {
-                valSampler.AddMember("input", s.input->index, w.mAl);
-                switch (s.interpolation) {
-                    case Interpolation_LINEAR:
-                        valSampler.AddMember("interpolation", "LINEAR", w.mAl);
-                        break;
-                    case Interpolation_STEP:
-                        valSampler.AddMember("interpolation", "STEP", w.mAl);
-                        break;
-                    case Interpolation_CUBICSPLINE:
-                        valSampler.AddMember("interpolation", "CUBICSPLINE", w.mAl);
-                        break;
-                }
-                valSampler.AddMember("output", s.output->index, w.mAl);
-            }
-            valSamplers.PushBack(valSampler, w.mAl);
-        }
-        obj.AddMember("samplers", valSamplers, w.mAl);
-    }
-
-    inline void Write(Value& obj, Buffer& b, AssetWriter& w)
-    {
-        obj.AddMember("byteLength", static_cast<uint64_t>(b.byteLength), w.mAl);
-
-        const auto uri = b.GetURI();
-        const auto relativeUri = uri.substr(uri.find_last_of("/\\") + 1u);
-        obj.AddMember("uri", Value(relativeUri, w.mAl).Move(), w.mAl);
-    }
-
-    inline void Write(Value& obj, BufferView& bv, AssetWriter& w)
-    {
-        obj.AddMember("buffer", bv.buffer->index, w.mAl);
-        obj.AddMember("byteOffset", static_cast<uint64_t>(bv.byteOffset), w.mAl);
-        obj.AddMember("byteLength", static_cast<uint64_t>(bv.byteLength), w.mAl);
-        if (bv.byteStride != 0) {
-            obj.AddMember("byteStride", bv.byteStride, w.mAl);
-        }
-        if (bv.target != BufferViewTarget_NONE) {
-            obj.AddMember("target", int(bv.target), w.mAl);
-        }
-    }
-
-    inline void Write(Value& /*obj*/, Camera& /*c*/, AssetWriter& /*w*/)
-    {
-
-    }
-
-    inline void Write(Value& /*obj*/, Light& /*c*/, AssetWriter& /*w*/)
-    {
-
-    }
-
-    inline void Write(Value& obj, Image& img, AssetWriter& w)
-    {
-        //basisu: no need to handle .ktx2, .basis, write as is
-        if (img.bufferView) {
-            obj.AddMember("bufferView", img.bufferView->index, w.mAl);
-            obj.AddMember("mimeType", Value(img.mimeType, w.mAl).Move(), w.mAl);
-        }
-        else {
-            std::string uri;
-            if (img.HasData()) {
-                uri = "data:" + (img.mimeType.empty() ? "application/octet-stream" : img.mimeType);
-                uri += ";base64,";
-                Base64::Encode(img.GetData(), img.GetDataLength(), uri);
-            }
-            else {
-                uri = img.uri;
-            }
-
-            obj.AddMember("uri", Value(uri, w.mAl).Move(), w.mAl);
-        }
-    }
-
-    namespace {
-        inline void SetTexBasic(TextureInfo t, Value& tex, MemoryPoolAllocator<>& al)
-        {
-            tex.SetObject();
-            tex.AddMember("index", t.texture->index, al);
-
-            if (t.texCoord != 0) {
-                tex.AddMember("texCoord", t.texCoord, al);
-            }
-        }
-
-        inline void WriteTex(Value& obj, TextureInfo t, const char* propName, MemoryPoolAllocator<>& al)
-        {
-
-            if (t.texture) {
-                Value tex;
-
-                SetTexBasic(t, tex, al);
-
-                obj.AddMember(StringRef(propName), tex, al);
-            }
-        }
-
-        inline void WriteTex(Value& obj, NormalTextureInfo t, const char* propName, MemoryPoolAllocator<>& al)
-        {
-
-            if (t.texture) {
-                Value tex;
-
-                SetTexBasic(t, tex, al);
-
-                if (t.scale != 1) {
-                    tex.AddMember("scale", t.scale, al);
-                }
-
-                obj.AddMember(StringRef(propName), tex, al);
-            }
-        }
-
-        inline void WriteTex(Value& obj, OcclusionTextureInfo t, const char* propName, MemoryPoolAllocator<>& al)
-        {
-
-            if (t.texture) {
-                Value tex;
-
-                SetTexBasic(t, tex, al);
-
-                if (t.strength != 1) {
-                    tex.AddMember("strength", t.strength, al);
-                }
-
-                obj.AddMember(StringRef(propName), tex, al);
-            }
-        }
-
-        template<size_t N>
-        inline void WriteVec(Value& obj, float(&prop)[N], const char* propName, MemoryPoolAllocator<>& al)
-        {
-            Value arr;
-            obj.AddMember(StringRef(propName), MakeValue(arr, prop, al), al);
-        }
-
-        template<size_t N>
-        inline void WriteVec(Value& obj, float(&prop)[N], const char* propName, const float(&defaultVal)[N], MemoryPoolAllocator<>& al)
-        {
-            if (!std::equal(std::begin(prop), std::end(prop), std::begin(defaultVal))) {
-                WriteVec(obj, prop, propName, al);
-            }
-        }
-
-        inline void WriteFloat(Value& obj, float prop, const char* propName, MemoryPoolAllocator<>& al)
-        {
-            Value num;
-            obj.AddMember(StringRef(propName), MakeValue(num, prop, al), al);
-        }
-    }
-
-    inline void Write(Value& obj, Material& m, AssetWriter& w)
-    {
-        Value pbrMetallicRoughness;
-        pbrMetallicRoughness.SetObject();
-        {
-            WriteTex(pbrMetallicRoughness, m.pbrMetallicRoughness.baseColorTexture, "baseColorTexture", w.mAl);
-            WriteTex(pbrMetallicRoughness, m.pbrMetallicRoughness.metallicRoughnessTexture, "metallicRoughnessTexture", w.mAl);
-            WriteVec(pbrMetallicRoughness, m.pbrMetallicRoughness.baseColorFactor, "baseColorFactor", defaultBaseColor, w.mAl);
-
-            if (m.pbrMetallicRoughness.metallicFactor != 1) {
-                WriteFloat(pbrMetallicRoughness, m.pbrMetallicRoughness.metallicFactor, "metallicFactor", w.mAl);
-            }
-
-            if (m.pbrMetallicRoughness.roughnessFactor != 1) {
-                WriteFloat(pbrMetallicRoughness, m.pbrMetallicRoughness.roughnessFactor, "roughnessFactor", w.mAl);
-            }
-        }
-
-        if (!pbrMetallicRoughness.ObjectEmpty()) {
-            obj.AddMember("pbrMetallicRoughness", pbrMetallicRoughness, w.mAl);
-        }
-
-        WriteTex(obj, m.normalTexture, "normalTexture", w.mAl);
-        WriteTex(obj, m.emissiveTexture, "emissiveTexture", w.mAl);
-        WriteTex(obj, m.occlusionTexture, "occlusionTexture", w.mAl);
-        WriteVec(obj, m.emissiveFactor, "emissiveFactor", defaultEmissiveFactor, w.mAl);
-
-        if (m.alphaCutoff != 0.5) {
-            WriteFloat(obj, m.alphaCutoff, "alphaCutoff", w.mAl);
-        }
-
-        if (m.alphaMode != "OPAQUE") {
-            obj.AddMember("alphaMode", Value(m.alphaMode, w.mAl).Move(), w.mAl);
-        }
-
-        if (m.doubleSided) {
-            obj.AddMember("doubleSided", m.doubleSided, w.mAl);
-        }
-
-        Value exts;
-        exts.SetObject();
-
-        if (m.pbrSpecularGlossiness.isPresent) {
-            Value pbrSpecularGlossiness;
-            pbrSpecularGlossiness.SetObject();
-
-            PbrSpecularGlossiness &pbrSG = m.pbrSpecularGlossiness.value;
-
-            //pbrSpecularGlossiness
-            WriteVec(pbrSpecularGlossiness, pbrSG.diffuseFactor, "diffuseFactor", defaultDiffuseFactor, w.mAl);
-            WriteVec(pbrSpecularGlossiness, pbrSG.specularFactor, "specularFactor", defaultSpecularFactor, w.mAl);
-
-            if (pbrSG.glossinessFactor != 1) {
-                WriteFloat(pbrSpecularGlossiness, pbrSG.glossinessFactor, "glossinessFactor", w.mAl);
-            }
-
-            WriteTex(pbrSpecularGlossiness, pbrSG.diffuseTexture, "diffuseTexture", w.mAl);
-            WriteTex(pbrSpecularGlossiness, pbrSG.specularGlossinessTexture, "specularGlossinessTexture", w.mAl);
-
-            if (!pbrSpecularGlossiness.ObjectEmpty()) {
-                exts.AddMember("KHR_materials_pbrSpecularGlossiness", pbrSpecularGlossiness, w.mAl);
-            }
-        }
-
-        if (m.unlit) {
-          Value unlit;
-          unlit.SetObject();
-          exts.AddMember("KHR_materials_unlit", unlit, w.mAl);
-        }
-
-        if (m.materialSheen.isPresent) {
-            Value materialSheen(rapidjson::Type::kObjectType);
-
-            MaterialSheen &sheen = m.materialSheen.value;
-
-            WriteVec(materialSheen, sheen.sheenColorFactor, "sheenColorFactor", defaultSheenFactor, w.mAl);
-
-            if (sheen.sheenRoughnessFactor != 0.f) {
-                WriteFloat(materialSheen, sheen.sheenRoughnessFactor, "sheenRoughnessFactor", w.mAl);
-            }
-
-            WriteTex(materialSheen, sheen.sheenColorTexture, "sheenColorTexture", w.mAl);
-            WriteTex(materialSheen, sheen.sheenRoughnessTexture, "sheenRoughnessTexture", w.mAl);
-
-            if (!materialSheen.ObjectEmpty()) {
-                exts.AddMember("KHR_materials_sheen", materialSheen, w.mAl);
-            }
-        }
-
-        if (m.materialClearcoat.isPresent) {
-            Value materialClearcoat(rapidjson::Type::kObjectType);
-
-            MaterialClearcoat &clearcoat = m.materialClearcoat.value;
-
-            if (clearcoat.clearcoatFactor != 0.f) {
-                WriteFloat(materialClearcoat, clearcoat.clearcoatFactor, "clearcoatFactor", w.mAl);
-            }
-
-            if (clearcoat.clearcoatRoughnessFactor != 0.f) {
-                WriteFloat(materialClearcoat, clearcoat.clearcoatRoughnessFactor, "clearcoatRoughnessFactor", w.mAl);
-            }
-
-            WriteTex(materialClearcoat, clearcoat.clearcoatTexture, "clearcoatTexture", w.mAl);
-            WriteTex(materialClearcoat, clearcoat.clearcoatRoughnessTexture, "clearcoatRoughnessTexture", w.mAl);
-            WriteTex(materialClearcoat, clearcoat.clearcoatNormalTexture, "clearcoatNormalTexture", w.mAl);
-
-            if (!materialClearcoat.ObjectEmpty()) {
-                exts.AddMember("KHR_materials_clearcoat", materialClearcoat, w.mAl);
-            }
-        }
-
-        if (m.materialTransmission.isPresent) {
-            Value materialTransmission(rapidjson::Type::kObjectType);
-
-            MaterialTransmission &transmission = m.materialTransmission.value;
-
-            if (transmission.transmissionFactor != 0.f) {
-                WriteFloat(materialTransmission, transmission.transmissionFactor, "transmissionFactor", w.mAl);
-            }
-
-            WriteTex(materialTransmission, transmission.transmissionTexture, "transmissionTexture", w.mAl);
-
-            if (!materialTransmission.ObjectEmpty()) {
-                exts.AddMember("KHR_materials_transmission", materialTransmission, w.mAl);
-            }
-        }
-
-        if (m.materialVolume.isPresent) {
-            Value materialVolume(rapidjson::Type::kObjectType);
-
-            MaterialVolume &volume = m.materialVolume.value;
-
-            if (volume.thicknessFactor != 0.f) {
-                WriteFloat(materialVolume, volume.thicknessFactor, "thicknessFactor", w.mAl);
-            }
-
-            WriteTex(materialVolume, volume.thicknessTexture, "thicknessTexture", w.mAl);
-
-            if (volume.attenuationDistance != INFINITY) {
-                WriteFloat(materialVolume, volume.attenuationDistance, "attenuationDistance", w.mAl);
-            }
-
-            WriteVec(materialVolume, volume.attenuationColor, "attenuationColor", defaultAttenuationColor, w.mAl);
-
-            if (!materialVolume.ObjectEmpty()) {
-                exts.AddMember("KHR_materials_volume", materialVolume, w.mAl);
-            }
-        }
-
-        if (m.materialIOR.isPresent) {
-            Value materialIOR(rapidjson::Type::kObjectType);
-
-            MaterialIOR &ior = m.materialIOR.value;
-
-            if (ior.ior != 1.5f) {
-                WriteFloat(materialIOR, ior.ior, "ior", w.mAl);
-            }
-
-            if (!materialIOR.ObjectEmpty()) {
-                exts.AddMember("KHR_materials_ior", materialIOR, w.mAl);
-            }
-        }
-
-        if (!exts.ObjectEmpty()) {
-            obj.AddMember("extensions", exts, w.mAl);
-        }
-    }
-
-    namespace {
-        inline void WriteAttrs(AssetWriter& w, Value& attrs, Mesh::AccessorList& lst,
-            const char* semantic, bool forceNumber = false)
-        {
-            if (lst.empty()) return;
-            if (lst.size() == 1 && !forceNumber) {
-                attrs.AddMember(StringRef(semantic), lst[0]->index, w.mAl);
-            }
-            else {
-                for (size_t i = 0; i < lst.size(); ++i) {
-                    char buffer[32];
-                    ai_snprintf(buffer, 32, "%s_%d", semantic, int(i));
-                    attrs.AddMember(Value(buffer, w.mAl).Move(), lst[i]->index, w.mAl);
-                }
-            }
-        }
-    }
-
-    inline void Write(Value& obj, Mesh& m, AssetWriter& w)
-    {
-		/****************** Primitives *******************/
-        Value primitives;
-        primitives.SetArray();
-        primitives.Reserve(unsigned(m.primitives.size()), w.mAl);
-
-        for (size_t i = 0; i < m.primitives.size(); ++i) {
-            Mesh::Primitive& p = m.primitives[i];
-            Value prim;
-            prim.SetObject();
-
-            // Extensions
-            if (p.ngonEncoded)
-            {
-                Value exts;
-                exts.SetObject();
-
-                Value FB_ngon_encoding;
-                FB_ngon_encoding.SetObject();
-
-                exts.AddMember(StringRef("FB_ngon_encoding"), FB_ngon_encoding, w.mAl);
-                prim.AddMember("extensions", exts, w.mAl);
-            }
-
-            {
-                prim.AddMember("mode", Value(int(p.mode)).Move(), w.mAl);
-
-                if (p.material)
-                    prim.AddMember("material", p.material->index, w.mAl);
-
-                if (p.indices)
-                    prim.AddMember("indices", p.indices->index, w.mAl);
-
-                Value attrs;
-                attrs.SetObject();
-                {
-                    WriteAttrs(w, attrs, p.attributes.position, "POSITION");
-                    WriteAttrs(w, attrs, p.attributes.normal, "NORMAL");
-                    WriteAttrs(w, attrs, p.attributes.texcoord, "TEXCOORD", true);
-                    WriteAttrs(w, attrs, p.attributes.color, "COLOR", true);
-                    WriteAttrs(w, attrs, p.attributes.joint, "JOINTS", true);
-                    WriteAttrs(w, attrs, p.attributes.weight, "WEIGHTS", true);
-                }
-                prim.AddMember("attributes", attrs, w.mAl);
-
-                // targets for blendshapes
-                if (p.targets.size() > 0) {
-                    Value tjs;
-                    tjs.SetArray();
-                    tjs.Reserve(unsigned(p.targets.size()), w.mAl);
-                    for (unsigned int t = 0; t < p.targets.size(); ++t) {
-                        Value tj;
-                        tj.SetObject();
-                        {
-                            WriteAttrs(w, tj, p.targets[t].position, "POSITION");
-                            WriteAttrs(w, tj, p.targets[t].normal, "NORMAL");
-                            WriteAttrs(w, tj, p.targets[t].tangent, "TANGENT");
-                        }
-                        tjs.PushBack(tj, w.mAl);
-                    }
-                    prim.AddMember("targets", tjs, w.mAl);
-                }
-            }
-            primitives.PushBack(prim, w.mAl);
-        }
-
-        obj.AddMember("primitives", primitives, w.mAl);
-        // targetNames
-        if (m.targetNames.size() > 0) {
-            Value extras;
-            extras.SetObject();
-            Value targetNames;
-            targetNames.SetArray();
-            targetNames.Reserve(unsigned(m.targetNames.size()), w.mAl);
-            for (unsigned int n = 0; n < m.targetNames.size(); ++n) {
-                std::string name = m.targetNames[n];
-                Value tname;
-                tname.SetString(name.c_str(), w.mAl);
-                targetNames.PushBack(tname, w.mAl);
-            }
-            extras.AddMember("targetNames", targetNames, w.mAl);
-            obj.AddMember("extras", extras, w.mAl);
-        }
-    }
-
-    inline void Write(Value& obj, Node& n, AssetWriter& w)
-    {
-        if (n.matrix.isPresent) {
-            Value val;
-            obj.AddMember("matrix", MakeValue(val, n.matrix.value, w.mAl).Move(), w.mAl);
-        }
-
-        if (n.translation.isPresent) {
-            Value val;
-            obj.AddMember("translation", MakeValue(val, n.translation.value, w.mAl).Move(), w.mAl);
-        }
-
-        if (n.scale.isPresent) {
-            Value val;
-            obj.AddMember("scale", MakeValue(val, n.scale.value, w.mAl).Move(), w.mAl);
-        }
-        if (n.rotation.isPresent) {
-            Value val;
-            obj.AddMember("rotation", MakeValue(val, n.rotation.value, w.mAl).Move(), w.mAl);
-        }
-
-        AddRefsVector(obj, "children", n.children, w.mAl);
-
-        if (!n.meshes.empty()) {
-            obj.AddMember("mesh", n.meshes[0]->index, w.mAl);
-        }
-
-        if (n.skin) {
-            obj.AddMember("skin", n.skin->index, w.mAl);
-        }
-
-        //gltf2 spec does not support "skeletons" under node
-        if(n.skeletons.size()) {
-            AddRefsVector(obj, "skeletons", n.skeletons, w.mAl);
-        }
-    }
-
-    inline void Write(Value& /*obj*/, Program& /*b*/, AssetWriter& /*w*/)
-    {
-
-    }
-
-    inline void Write(Value& obj, Sampler& b, AssetWriter& w)
-    {
-        if (!b.name.empty()) {
-            obj.AddMember("name", b.name, w.mAl);
-        }
-
-        if (b.wrapS != SamplerWrap::UNSET && b.wrapS != SamplerWrap::Repeat) {
-            obj.AddMember("wrapS", static_cast<unsigned int>(b.wrapS), w.mAl);
-        }
-
-        if (b.wrapT != SamplerWrap::UNSET && b.wrapT != SamplerWrap::Repeat) {
-            obj.AddMember("wrapT", static_cast<unsigned int>(b.wrapT), w.mAl);
-        }
-
-        if (b.magFilter != SamplerMagFilter::UNSET) {
-            obj.AddMember("magFilter", static_cast<unsigned int>(b.magFilter), w.mAl);
-        }
-
-        if (b.minFilter != SamplerMinFilter::UNSET) {
-            obj.AddMember("minFilter", static_cast<unsigned int>(b.minFilter), w.mAl);
-        }
-    }
-
-    inline void Write(Value& scene, Scene& s, AssetWriter& w)
-    {
-        AddRefsVector(scene, "nodes", s.nodes, w.mAl);
-    }
-
-    inline void Write(Value& /*obj*/, Shader& /*b*/, AssetWriter& /*w*/)
-    {
-
-    }
-
-    inline void Write(Value& obj, Skin& b, AssetWriter& w)
-    {
-        /****************** jointNames *******************/
-        Value vJointNames;
-        vJointNames.SetArray();
-        vJointNames.Reserve(unsigned(b.jointNames.size()), w.mAl);
-
-        for (size_t i = 0; i < unsigned(b.jointNames.size()); ++i) {
-            vJointNames.PushBack(b.jointNames[i]->index, w.mAl);
-        }
-        obj.AddMember("joints", vJointNames, w.mAl);
-
-        if (b.bindShapeMatrix.isPresent) {
-            Value val;
-            obj.AddMember("bindShapeMatrix", MakeValue(val, b.bindShapeMatrix.value, w.mAl).Move(), w.mAl);
-        }
-
-        if (b.inverseBindMatrices) {
-            obj.AddMember("inverseBindMatrices", b.inverseBindMatrices->index, w.mAl);
-        }
-
-    }
-
-    inline void Write(Value& obj, Texture& tex, AssetWriter& w)
-    {
-        if (tex.source) {
-            obj.AddMember("source", tex.source->index, w.mAl);
-        }
-        if (tex.sampler) {
-            obj.AddMember("sampler", tex.sampler->index, w.mAl);
-        }
-    }
-
-
-    inline AssetWriter::AssetWriter(Asset& a)
-        : mDoc()
-        , mAsset(a)
-        , mAl(mDoc.GetAllocator())
-    {
-        mDoc.SetObject();
-
-        WriteMetadata();
-        WriteExtensionsUsed();
-
-        // Dump the contents of the dictionaries
-        for (size_t i = 0; i < a.mDicts.size(); ++i) {
-            a.mDicts[i]->WriteObjects(*this);
-        }
-
-        // Add the target scene field
-        if (mAsset.scene) {
-            mDoc.AddMember("scene", mAsset.scene->index, mAl);
-        }
-
-        if(mAsset.extras) {
-            mDoc.AddMember("extras", *mAsset.extras, mAl);
-        }
-    }
-
-    inline void AssetWriter::WriteFile(const char* path)
-    {
-        std::unique_ptr<IOStream> jsonOutFile(mAsset.OpenFile(path, "wt", true));
-
-        if (jsonOutFile == 0) {
-            throw DeadlyExportError("Could not open output file: " + std::string(path));
-        }
-
-        StringBuffer docBuffer;
-
-        PrettyWriter<StringBuffer> writer(docBuffer);
-        if (!mDoc.Accept(writer)) {
-            throw DeadlyExportError("Failed to write scene data!");
-        }
-
-        if (jsonOutFile->Write(docBuffer.GetString(), docBuffer.GetSize(), 1) != 1) {
-            throw DeadlyExportError("Failed to write scene data!");
-        }
-
-        // Write buffer data to separate .bin files
-        for (unsigned int i = 0; i < mAsset.buffers.Size(); ++i) {
-            Ref<Buffer> b = mAsset.buffers.Get(i);
-
-            std::string binPath = b->GetURI();
-
-            std::unique_ptr<IOStream> binOutFile(mAsset.OpenFile(binPath, "wb", true));
-
-            if (binOutFile == 0) {
-                throw DeadlyExportError("Could not open output file: " + binPath);
-            }
-
-            if (b->byteLength > 0) {
-                if (binOutFile->Write(b->GetPointer(), b->byteLength, 1) != 1) {
-                    throw DeadlyExportError("Failed to write binary file: " + binPath);
-                }
-            }
-        }
-    }
-
-    inline void AssetWriter::WriteGLBFile(const char* path)
-    {
-        std::unique_ptr<IOStream> outfile(mAsset.OpenFile(path, "wb", true));
-
-        if (outfile == 0) {
-            throw DeadlyExportError("Could not open output file: " + std::string(path));
-        }
-
-        Ref<Buffer> bodyBuffer = mAsset.GetBodyBuffer();
-        if (bodyBuffer->byteLength > 0) {
-            rapidjson::Value glbBodyBuffer;
-            glbBodyBuffer.SetObject();
-            glbBodyBuffer.AddMember("byteLength", static_cast<uint64_t>(bodyBuffer->byteLength), mAl);
-            mDoc["buffers"].PushBack(glbBodyBuffer, mAl);
-        }
-
-        // Padding with spaces as required by the spec
-        uint32_t padding = 0x20202020;
-
-        //
-        // JSON chunk
-        //
-
-        StringBuffer docBuffer;
-        Writer<StringBuffer> writer(docBuffer);
-        if (!mDoc.Accept(writer)) {
-            throw DeadlyExportError("Failed to write scene data!");
-        }
-
-        uint32_t jsonChunkLength = (docBuffer.GetSize() + 3) & ~3; // Round up to next multiple of 4
-        auto paddingLength = jsonChunkLength - docBuffer.GetSize();
-
-        GLB_Chunk jsonChunk;
-        jsonChunk.chunkLength = jsonChunkLength;
-        jsonChunk.chunkType = ChunkType_JSON;
-        AI_SWAP4(jsonChunk.chunkLength);
-
-        outfile->Seek(sizeof(GLB_Header), aiOrigin_SET);
-        if (outfile->Write(&jsonChunk, 1, sizeof(GLB_Chunk)) != sizeof(GLB_Chunk)) {
-            throw DeadlyExportError("Failed to write scene data header!");
-        }
-        if (outfile->Write(docBuffer.GetString(), 1, docBuffer.GetSize()) != docBuffer.GetSize()) {
-            throw DeadlyExportError("Failed to write scene data!");
-        }
-        if (paddingLength && outfile->Write(&padding, 1, paddingLength) != paddingLength) {
-            throw DeadlyExportError("Failed to write scene data padding!");
-        }
-
-        //
-        // Binary chunk
-        //
-
-        int GLB_Chunk_count = 1;
-        uint32_t binaryChunkLength = 0;
-        if (bodyBuffer->byteLength > 0) {
-            binaryChunkLength = (bodyBuffer->byteLength + 3) & ~3; // Round up to next multiple of 4
-
-            auto curPaddingLength = binaryChunkLength - bodyBuffer->byteLength;
-            ++GLB_Chunk_count;
-
-            GLB_Chunk binaryChunk;
-            binaryChunk.chunkLength = binaryChunkLength;
-            binaryChunk.chunkType = ChunkType_BIN;
-            AI_SWAP4(binaryChunk.chunkLength);
-
-            size_t bodyOffset = sizeof(GLB_Header) + sizeof(GLB_Chunk) + jsonChunk.chunkLength;
-            outfile->Seek(bodyOffset, aiOrigin_SET);
-            if (outfile->Write(&binaryChunk, 1, sizeof(GLB_Chunk)) != sizeof(GLB_Chunk)) {
-                throw DeadlyExportError("Failed to write body data header!");
-            }
-            if (outfile->Write(bodyBuffer->GetPointer(), 1, bodyBuffer->byteLength) != bodyBuffer->byteLength) {
-                throw DeadlyExportError("Failed to write body data!");
-            }
-            if (curPaddingLength && outfile->Write(&padding, 1, paddingLength) != paddingLength) {
-                throw DeadlyExportError("Failed to write body data padding!");
-            }
-        }
-
-        //
-        // Header
-        //
-
-        GLB_Header header;
-        memcpy(header.magic, AI_GLB_MAGIC_NUMBER, sizeof(header.magic));
-
-        header.version = 2;
-        AI_SWAP4(header.version);
-
-        header.length = uint32_t(sizeof(GLB_Header) + GLB_Chunk_count * sizeof(GLB_Chunk) + jsonChunkLength + binaryChunkLength);
-        AI_SWAP4(header.length);
-
-        outfile->Seek(0, aiOrigin_SET);
-        if (outfile->Write(&header, 1, sizeof(GLB_Header)) != sizeof(GLB_Header)) {
-            throw DeadlyExportError("Failed to write the header!");
-        }
-    }
-
-    inline void AssetWriter::WriteMetadata()
-    {
-        Value asset;
-        asset.SetObject();
-        asset.AddMember("version", Value(mAsset.asset.version, mAl).Move(), mAl);
-        asset.AddMember("generator", Value(mAsset.asset.generator, mAl).Move(), mAl);
-        if (!mAsset.asset.copyright.empty())
-            asset.AddMember("copyright", Value(mAsset.asset.copyright, mAl).Move(), mAl);
-        mDoc.AddMember("asset", asset, mAl);
-    }
-
-    inline void AssetWriter::WriteExtensionsUsed()
-    {
-        Value exts;
-        exts.SetArray();
-        {
-            // This is used to export pbrSpecularGlossiness materials with GLTF 2.
-            if (this->mAsset.extensionsUsed.KHR_materials_pbrSpecularGlossiness) {
-                exts.PushBack(StringRef("KHR_materials_pbrSpecularGlossiness"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.KHR_materials_unlit) {
-              exts.PushBack(StringRef("KHR_materials_unlit"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.KHR_materials_sheen) {
-                exts.PushBack(StringRef("KHR_materials_sheen"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.KHR_materials_clearcoat) {
-                exts.PushBack(StringRef("KHR_materials_clearcoat"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.KHR_materials_transmission) {
-                exts.PushBack(StringRef("KHR_materials_transmission"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.KHR_materials_volume) {
-                exts.PushBack(StringRef("KHR_materials_volume"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.KHR_materials_ior) {
-                exts.PushBack(StringRef("KHR_materials_ior"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.FB_ngon_encoding) {
-                exts.PushBack(StringRef("FB_ngon_encoding"), mAl);
-            }
-
-            if (this->mAsset.extensionsUsed.KHR_texture_basisu) {
-                exts.PushBack(StringRef("KHR_texture_basisu"), mAl);
-            }
-        }
-
-        if (!exts.Empty())
-            mDoc.AddMember("extensionsUsed", exts, mAl);
-
-        //basisu extensionRequired
-        Value extsReq;
-        extsReq.SetArray();
-        if (this->mAsset.extensionsUsed.KHR_texture_basisu) {
-            extsReq.PushBack(StringRef("KHR_texture_basisu"), mAl);
-            mDoc.AddMember("extensionsRequired", extsReq, mAl);
-        }
-    }
-
-    template<class T>
-    void AssetWriter::WriteObjects(LazyDict<T>& d)
-    {
-        if (d.mObjs.empty()) return;
-
-        Value* container = &mDoc;
-		const char* context = "Document";
-
-        if (d.mExtId) {
-            Value* exts = FindObject(mDoc, "extensions");
-            if (nullptr != exts) {
-                mDoc.AddMember("extensions", Value().SetObject().Move(), mDoc.GetAllocator());
-                exts = FindObject(mDoc, "extensions");
-            }
-
-            container = FindObjectInContext(*exts, d.mExtId, "extensions");
-            if (nullptr != container) {
-                exts->AddMember(StringRef(d.mExtId), Value().SetObject().Move(), mDoc.GetAllocator());
-                container = FindObjectInContext(*exts, d.mExtId, "extensions");
-                context = d.mExtId;
-            }
-        }
-
-        Value *dict = FindArrayInContext(*container, d.mDictId, context);
-        if (nullptr == dict) {
-            container->AddMember(StringRef(d.mDictId), Value().SetArray().Move(), mDoc.GetAllocator());
-            dict = FindArrayInContext(*container, d.mDictId, context);
-            if (nullptr == dict) {
-                return;
-            }
-        }
-
-        for (size_t i = 0; i < d.mObjs.size(); ++i) {
-            if (d.mObjs[i]->IsSpecial()) {
-                continue;
-            }
-
-            Value obj;
-            obj.SetObject();
-
-            if (!d.mObjs[i]->name.empty()) {
-                obj.AddMember("name", StringRef(d.mObjs[i]->name.c_str()), mAl);
-            }
-
-            Write(obj, *d.mObjs[i], *this);
-
-            dict->PushBack(obj, mAl);
-        }
-    }
-
-    template<class T>
-    void WriteLazyDict(LazyDict<T>& d, AssetWriter& w)
-    {
-        w.WriteObjects(d);
-    }
-
-}
diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2Exporter.cpp b/libs/assimp/code/AssetLib/glTF2/glTF2Exporter.cpp
deleted file mode 100644
index ffd8d22..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2Exporter.cpp
+++ /dev/null
@@ -1,1542 +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_GLTF_EXPORTER
-
-#include "AssetLib/glTF2/glTF2Exporter.h"
-#include "AssetLib/glTF2/glTF2AssetWriter.h"
-#include "PostProcessing/SplitLargeMeshes.h"
-
-#include <assimp/ByteSwapper.h>
-#include <assimp/Exceptional.h>
-#include <assimp/SceneCombiner.h>
-#include <assimp/StringComparison.h>
-#include <assimp/commonMetaData.h>
-#include <assimp/material.h>
-#include <assimp/scene.h>
-#include <assimp/version.h>
-#include <assimp/Exporter.hpp>
-#include <assimp/IOSystem.hpp>
-
-// Header files, standard library.
-#include <cinttypes>
-#include <limits>
-#include <memory>
-
-using namespace rapidjson;
-
-using namespace Assimp;
-using namespace glTF2;
-
-namespace Assimp {
-
-// ------------------------------------------------------------------------------------------------
-// Worker function for exporting a scene to GLTF. Prototyped and registered in Exporter.cpp
-void ExportSceneGLTF2(const char *pFile, IOSystem *pIOSystem, const aiScene *pScene, const ExportProperties *pProperties) {
-    // invoke the exporter
-    glTF2Exporter exporter(pFile, pIOSystem, pScene, pProperties, false);
-}
-
-// ------------------------------------------------------------------------------------------------
-// Worker function for exporting a scene to GLB. Prototyped and registered in Exporter.cpp
-void ExportSceneGLB2(const char *pFile, IOSystem *pIOSystem, const aiScene *pScene, const ExportProperties *pProperties) {
-    // invoke the exporter
-    glTF2Exporter exporter(pFile, pIOSystem, pScene, pProperties, true);
-}
-
-} // end of namespace Assimp
-
-glTF2Exporter::glTF2Exporter(const char *filename, IOSystem *pIOSystem, const aiScene *pScene,
-        const ExportProperties *pProperties, bool isBinary) :
-        mFilename(filename), mIOSystem(pIOSystem), mScene(pScene), mProperties(pProperties), mAsset(new Asset(pIOSystem)) {
-    // Always on as our triangulation process is aware of this type of encoding
-    mAsset->extensionsUsed.FB_ngon_encoding = true;
-
-    if (isBinary) {
-        mAsset->SetAsBinary();
-    }
-
-    ExportMetadata();
-
-    ExportMaterials();
-
-    if (mScene->mRootNode) {
-        ExportNodeHierarchy(mScene->mRootNode);
-    }
-
-    ExportMeshes();
-    MergeMeshes();
-
-    ExportScene();
-
-    ExportAnimations();
-
-    // export extras
-    if (mProperties->HasPropertyCallback("extras")) {
-        std::function<void *(void *)> ExportExtras = mProperties->GetPropertyCallback("extras");
-        mAsset->extras = (rapidjson::Value *)ExportExtras(0);
-    }
-
-    AssetWriter writer(*mAsset);
-
-    if (isBinary) {
-        writer.WriteGLBFile(filename);
-    } else {
-        writer.WriteFile(filename);
-    }
-}
-
-glTF2Exporter::~glTF2Exporter() {
-    // empty
-}
-
-/*
- * Copy a 4x4 matrix from struct aiMatrix to typedef mat4.
- * Also converts from row-major to column-major storage.
- */
-static void CopyValue(const aiMatrix4x4 &v, mat4 &o) {
-    o[0] = v.a1;
-    o[1] = v.b1;
-    o[2] = v.c1;
-    o[3] = v.d1;
-    o[4] = v.a2;
-    o[5] = v.b2;
-    o[6] = v.c2;
-    o[7] = v.d2;
-    o[8] = v.a3;
-    o[9] = v.b3;
-    o[10] = v.c3;
-    o[11] = v.d3;
-    o[12] = v.a4;
-    o[13] = v.b4;
-    o[14] = v.c4;
-    o[15] = v.d4;
-}
-
-static void CopyValue(const aiMatrix4x4 &v, aiMatrix4x4 &o) {
-    memcpy(&o, &v, sizeof(aiMatrix4x4));
-}
-
-static void IdentityMatrix4(mat4 &o) {
-    o[0] = 1;
-    o[1] = 0;
-    o[2] = 0;
-    o[3] = 0;
-    o[4] = 0;
-    o[5] = 1;
-    o[6] = 0;
-    o[7] = 0;
-    o[8] = 0;
-    o[9] = 0;
-    o[10] = 1;
-    o[11] = 0;
-    o[12] = 0;
-    o[13] = 0;
-    o[14] = 0;
-    o[15] = 1;
-}
-
-static bool IsBoneWeightFitted(vec4 &weight) {
-    return weight[0] + weight[1] + weight[2] + weight[3] >= 1.f;
-}
-
-static int FitBoneWeight(vec4 &weight, float value) {
-    int i = 0;
-    for (; i < 4; ++i) {
-        if (weight[i] < value) {
-            weight[i] = value;
-            return i;
-        }
-    }
-
-    return -1;
-}
-
-template <typename T>
-void SetAccessorRange(Ref<Accessor> acc, void *data, size_t count,
-        unsigned int numCompsIn, unsigned int numCompsOut) {
-    ai_assert(numCompsOut <= numCompsIn);
-
-    // Allocate and initialize with large values.
-    for (unsigned int i = 0; i < numCompsOut; i++) {
-        acc->min.push_back(std::numeric_limits<double>::max());
-        acc->max.push_back(-std::numeric_limits<double>::max());
-    }
-
-    size_t totalComps = count * numCompsIn;
-    T *buffer_ptr = static_cast<T *>(data);
-    T *buffer_end = buffer_ptr + totalComps;
-
-    // Search and set extreme values.
-    for (; buffer_ptr < buffer_end; buffer_ptr += numCompsIn) {
-        for (unsigned int j = 0; j < numCompsOut; j++) {
-            double valueTmp = buffer_ptr[j];
-
-            // Gracefully tolerate rogue NaN's in buffer data
-            // Any NaNs/Infs introduced in accessor bounds will end up in
-            // document and prevent rapidjson from writing out valid JSON
-            if (!std::isfinite(valueTmp)) {
-                continue;
-            }
-
-            if (valueTmp < acc->min[j]) {
-                acc->min[j] = valueTmp;
-            }
-            if (valueTmp > acc->max[j]) {
-                acc->max[j] = valueTmp;
-            }
-        }
-    }
-}
-
-inline void SetAccessorRange(ComponentType compType, Ref<Accessor> acc, void *data,
-        size_t count, unsigned int numCompsIn, unsigned int numCompsOut) {
-    switch (compType) {
-    case ComponentType_SHORT:
-        SetAccessorRange<short>(acc, data, count, numCompsIn, numCompsOut);
-        return;
-    case ComponentType_UNSIGNED_SHORT:
-        SetAccessorRange<unsigned short>(acc, data, count, numCompsIn, numCompsOut);
-        return;
-    case ComponentType_UNSIGNED_INT:
-        SetAccessorRange<unsigned int>(acc, data, count, numCompsIn, numCompsOut);
-        return;
-    case ComponentType_FLOAT:
-        SetAccessorRange<float>(acc, data, count, numCompsIn, numCompsOut);
-        return;
-    case ComponentType_BYTE:
-        SetAccessorRange<int8_t>(acc, data, count, numCompsIn, numCompsOut);
-        return;
-    case ComponentType_UNSIGNED_BYTE:
-        SetAccessorRange<uint8_t>(acc, data, count, numCompsIn, numCompsOut);
-        return;
-    }
-}
-
-// compute the (data-dataBase), store the non-zero data items
-template <typename T>
-size_t NZDiff(void *data, void *dataBase, size_t count, unsigned int numCompsIn, unsigned int numCompsOut, void *&outputNZDiff, void *&outputNZIdx) {
-    std::vector<T> vNZDiff;
-    std::vector<unsigned short> vNZIdx;
-    size_t totalComps = count * numCompsIn;
-    T *bufferData_ptr = static_cast<T *>(data);
-    T *bufferData_end = bufferData_ptr + totalComps;
-    T *bufferBase_ptr = static_cast<T *>(dataBase);
-
-    // Search and set extreme values.
-    for (short idx = 0; bufferData_ptr < bufferData_end; idx += 1, bufferData_ptr += numCompsIn) {
-        bool bNonZero = false;
-
-        //for the data, check any component Non Zero
-        for (unsigned int j = 0; j < numCompsOut; j++) {
-            double valueData = bufferData_ptr[j];
-            double valueBase = bufferBase_ptr ? bufferBase_ptr[j] : 0;
-            if ((valueData - valueBase) != 0) {
-                bNonZero = true;
-                break;
-            }
-        }
-
-        //all zeros, continue
-        if (!bNonZero)
-            continue;
-
-        //non zero, store the data
-        for (unsigned int j = 0; j < numCompsOut; j++) {
-            T valueData = bufferData_ptr[j];
-            T valueBase = bufferBase_ptr ? bufferBase_ptr[j] : 0;
-            vNZDiff.push_back(valueData - valueBase);
-        }
-        vNZIdx.push_back(idx);
-    }
-
-    //avoid all-0, put 1 item
-    if (vNZDiff.size() == 0) {
-        for (unsigned int j = 0; j < numCompsOut; j++)
-            vNZDiff.push_back(0);
-        vNZIdx.push_back(0);
-    }
-
-    //process data
-    outputNZDiff = new T[vNZDiff.size()];
-    memcpy(outputNZDiff, vNZDiff.data(), vNZDiff.size() * sizeof(T));
-
-    outputNZIdx = new unsigned short[vNZIdx.size()];
-    memcpy(outputNZIdx, vNZIdx.data(), vNZIdx.size() * sizeof(unsigned short));
-    return vNZIdx.size();
-}
-
-inline size_t NZDiff(ComponentType compType, void *data, void *dataBase, size_t count, unsigned int numCompsIn, unsigned int numCompsOut, void *&nzDiff, void *&nzIdx) {
-    switch (compType) {
-    case ComponentType_SHORT:
-        return NZDiff<short>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
-    case ComponentType_UNSIGNED_SHORT:
-        return NZDiff<unsigned short>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
-    case ComponentType_UNSIGNED_INT:
-        return NZDiff<unsigned int>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
-    case ComponentType_FLOAT:
-        return NZDiff<float>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
-    case ComponentType_BYTE:
-        return NZDiff<int8_t>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
-    case ComponentType_UNSIGNED_BYTE:
-        return NZDiff<uint8_t>(data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
-    }
-    return 0;
-}
-
-inline Ref<Accessor> ExportDataSparse(Asset &a, std::string &meshName, Ref<Buffer> &buffer,
-        size_t count, void *data, AttribType::Value typeIn, AttribType::Value typeOut, ComponentType compType, BufferViewTarget target = BufferViewTarget_NONE, void *dataBase = 0) {
-    if (!count || !data) {
-        return Ref<Accessor>();
-    }
-
-    unsigned int numCompsIn = AttribType::GetNumComponents(typeIn);
-    unsigned int numCompsOut = AttribType::GetNumComponents(typeOut);
-    unsigned int bytesPerComp = ComponentTypeSize(compType);
-
-    // accessor
-    Ref<Accessor> acc = a.accessors.Create(a.FindUniqueID(meshName, "accessor"));
-
-    // if there is a basic data vector
-    if (dataBase) {
-        size_t base_offset = buffer->byteLength;
-        size_t base_padding = base_offset % bytesPerComp;
-        base_offset += base_padding;
-        size_t base_length = count * numCompsOut * bytesPerComp;
-        buffer->Grow(base_length + base_padding);
-
-        Ref<BufferView> bv = a.bufferViews.Create(a.FindUniqueID(meshName, "view"));
-        bv->buffer = buffer;
-        bv->byteOffset = base_offset;
-        bv->byteLength = base_length; //! The target that the WebGL buffer should be bound to.
-        bv->byteStride = 0;
-        bv->target = target;
-        acc->bufferView = bv;
-        acc->WriteData(count, dataBase, numCompsIn * bytesPerComp);
-    }
-    acc->byteOffset = 0;
-    acc->componentType = compType;
-    acc->count = count;
-    acc->type = typeOut;
-
-    if (data) {
-        void *nzDiff = 0, *nzIdx = 0;
-        size_t nzCount = NZDiff(compType, data, dataBase, count, numCompsIn, numCompsOut, nzDiff, nzIdx);
-        acc->sparse.reset(new Accessor::Sparse);
-        acc->sparse->count = nzCount;
-
-        //indices
-        unsigned int bytesPerIdx = sizeof(unsigned short);
-        size_t indices_offset = buffer->byteLength;
-        size_t indices_padding = indices_offset % bytesPerIdx;
-        indices_offset += indices_padding;
-        size_t indices_length = nzCount * 1 * bytesPerIdx;
-        buffer->Grow(indices_length + indices_padding);
-
-        Ref<BufferView> indicesBV = a.bufferViews.Create(a.FindUniqueID(meshName, "view"));
-        indicesBV->buffer = buffer;
-        indicesBV->byteOffset = indices_offset;
-        indicesBV->byteLength = indices_length;
-        indicesBV->byteStride = 0;
-        acc->sparse->indices = indicesBV;
-        acc->sparse->indicesType = ComponentType_UNSIGNED_SHORT;
-        acc->sparse->indicesByteOffset = 0;
-        acc->WriteSparseIndices(nzCount, nzIdx, 1 * bytesPerIdx);
-
-        //values
-        size_t values_offset = buffer->byteLength;
-        size_t values_padding = values_offset % bytesPerComp;
-        values_offset += values_padding;
-        size_t values_length = nzCount * numCompsOut * bytesPerComp;
-        buffer->Grow(values_length + values_padding);
-
-        Ref<BufferView> valuesBV = a.bufferViews.Create(a.FindUniqueID(meshName, "view"));
-        valuesBV->buffer = buffer;
-        valuesBV->byteOffset = values_offset;
-        valuesBV->byteLength = values_length;
-        valuesBV->byteStride = 0;
-        acc->sparse->values = valuesBV;
-        acc->sparse->valuesByteOffset = 0;
-        acc->WriteSparseValues(nzCount, nzDiff, numCompsIn * bytesPerComp);
-
-        //clear
-        delete[](char *) nzDiff;
-        delete[](char *) nzIdx;
-    }
-    return acc;
-}
-inline Ref<Accessor> ExportData(Asset &a, std::string &meshName, Ref<Buffer> &buffer,
-        size_t count, void *data, AttribType::Value typeIn, AttribType::Value typeOut, ComponentType compType, BufferViewTarget target = BufferViewTarget_NONE) {
-    if (!count || !data) {
-        return Ref<Accessor>();
-    }
-
-    unsigned int numCompsIn = AttribType::GetNumComponents(typeIn);
-    unsigned int numCompsOut = AttribType::GetNumComponents(typeOut);
-    unsigned int bytesPerComp = ComponentTypeSize(compType);
-
-    size_t offset = buffer->byteLength;
-    // make sure offset is correctly byte-aligned, as required by spec
-    size_t padding = offset % bytesPerComp;
-    offset += padding;
-    size_t length = count * numCompsOut * bytesPerComp;
-    buffer->Grow(length + padding);
-
-    // bufferView
-    Ref<BufferView> bv = a.bufferViews.Create(a.FindUniqueID(meshName, "view"));
-    bv->buffer = buffer;
-    bv->byteOffset = offset;
-    bv->byteLength = length; //! The target that the WebGL buffer should be bound to.
-    bv->byteStride = 0;
-    bv->target = target;
-
-    // accessor
-    Ref<Accessor> acc = a.accessors.Create(a.FindUniqueID(meshName, "accessor"));
-    acc->bufferView = bv;
-    acc->byteOffset = 0;
-    acc->componentType = compType;
-    acc->count = count;
-    acc->type = typeOut;
-
-    // calculate min and max values
-    SetAccessorRange(compType, acc, data, count, numCompsIn, numCompsOut);
-
-    // copy the data
-    acc->WriteData(count, data, numCompsIn * bytesPerComp);
-
-    return acc;
-}
-
-inline void SetSamplerWrap(SamplerWrap &wrap, aiTextureMapMode map) {
-    switch (map) {
-    case aiTextureMapMode_Clamp:
-        wrap = SamplerWrap::Clamp_To_Edge;
-        break;
-    case aiTextureMapMode_Mirror:
-        wrap = SamplerWrap::Mirrored_Repeat;
-        break;
-    case aiTextureMapMode_Wrap:
-    case aiTextureMapMode_Decal:
-    default:
-        wrap = SamplerWrap::Repeat;
-        break;
-    };
-}
-
-void glTF2Exporter::GetTexSampler(const aiMaterial &mat, Ref<Texture> texture, aiTextureType tt, unsigned int slot) {
-    aiString aId;
-    std::string id;
-    if (aiGetMaterialString(&mat, AI_MATKEY_GLTF_MAPPINGID(tt, slot), &aId) == AI_SUCCESS) {
-        id = aId.C_Str();
-    }
-
-    if (Ref<Sampler> ref = mAsset->samplers.Get(id.c_str())) {
-        texture->sampler = ref;
-    } else {
-        id = mAsset->FindUniqueID(id, "sampler");
-
-        texture->sampler = mAsset->samplers.Create(id.c_str());
-
-        aiTextureMapMode mapU, mapV;
-        SamplerMagFilter filterMag;
-        SamplerMinFilter filterMin;
-
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_MAPPINGMODE_U(tt, slot), (int *)&mapU) == AI_SUCCESS) {
-            SetSamplerWrap(texture->sampler->wrapS, mapU);
-        }
-
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_MAPPINGMODE_V(tt, slot), (int *)&mapV) == AI_SUCCESS) {
-            SetSamplerWrap(texture->sampler->wrapT, mapV);
-        }
-
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_GLTF_MAPPINGFILTER_MAG(tt, slot), (int *)&filterMag) == AI_SUCCESS) {
-            texture->sampler->magFilter = filterMag;
-        }
-
-        if (aiGetMaterialInteger(&mat, AI_MATKEY_GLTF_MAPPINGFILTER_MIN(tt, slot), (int *)&filterMin) == AI_SUCCESS) {
-            texture->sampler->minFilter = filterMin;
-        }
-
-        aiString name;
-        if (aiGetMaterialString(&mat, AI_MATKEY_GLTF_MAPPINGNAME(tt, slot), &name) == AI_SUCCESS) {
-            texture->sampler->name = name.C_Str();
-        }
-    }
-}
-
-void glTF2Exporter::GetMatTexProp(const aiMaterial &mat, unsigned int &prop, const char *propName, aiTextureType tt, unsigned int slot) {
-    std::string textureKey = std::string(_AI_MATKEY_TEXTURE_BASE) + "." + propName;
-
-    mat.Get(textureKey.c_str(), tt, slot, prop);
-}
-
-void glTF2Exporter::GetMatTexProp(const aiMaterial &mat, float &prop, const char *propName, aiTextureType tt, unsigned int slot) {
-    std::string textureKey = std::string(_AI_MATKEY_TEXTURE_BASE) + "." + propName;
-
-    mat.Get(textureKey.c_str(), tt, slot, prop);
-}
-
-void glTF2Exporter::GetMatTex(const aiMaterial &mat, Ref<Texture> &texture, unsigned int &texCoord, aiTextureType tt, unsigned int slot = 0) {
-    if (mat.GetTextureCount(tt) == 0) {
-        return;
-    }
-        
-    aiString tex;
-
-    // Read texcoord (UV map index)
-    mat.Get(AI_MATKEY_UVWSRC(tt, slot), texCoord);
-
-    if (mat.Get(AI_MATKEY_TEXTURE(tt, slot), tex) == AI_SUCCESS) {
-        std::string path = tex.C_Str();
-
-        if (path.size() > 0) {
-            std::map<std::string, unsigned int>::iterator it = mTexturesByPath.find(path);
-            if (it != mTexturesByPath.end()) {
-                texture = mAsset->textures.Get(it->second);
-            }
-
-            bool useBasisUniversal = false;
-            if (!texture) {
-                std::string texId = mAsset->FindUniqueID("", "texture");
-                texture = mAsset->textures.Create(texId);
-                mTexturesByPath[path] = texture.GetIndex();
-
-                std::string imgId = mAsset->FindUniqueID("", "image");
-                texture->source = mAsset->images.Create(imgId);
-
-                const aiTexture *curTex = mScene->GetEmbeddedTexture(path.c_str());
-                if (curTex != nullptr) { // embedded
-                    texture->source->name = curTex->mFilename.C_Str();
-
-                    //basisu: embedded ktx2, bu
-                    if (curTex->achFormatHint[0]) {
-                        std::string mimeType = "image/";
-                        if (memcmp(curTex->achFormatHint, "jpg", 3) == 0)
-                            mimeType += "jpeg";
-                        else if (memcmp(curTex->achFormatHint, "ktx", 3) == 0) {
-                            useBasisUniversal = true;
-                            mimeType += "ktx";
-                        } else if (memcmp(curTex->achFormatHint, "kx2", 3) == 0) {
-                            useBasisUniversal = true;
-                            mimeType += "ktx2";
-                        } else if (memcmp(curTex->achFormatHint, "bu", 2) == 0) {
-                            useBasisUniversal = true;
-                            mimeType += "basis";
-                        } else
-                            mimeType += curTex->achFormatHint;
-                        texture->source->mimeType = mimeType;
-                    }
-
-                    // The asset has its own buffer, see Image::SetData
-                    //basisu: "image/ktx2", "image/basis" as is
-                    texture->source->SetData(reinterpret_cast<uint8_t *>(curTex->pcData), curTex->mWidth, *mAsset);
-                } else {
-                    texture->source->uri = path;
-                    if (texture->source->uri.find(".ktx") != std::string::npos ||
-                            texture->source->uri.find(".basis") != std::string::npos) {
-                        useBasisUniversal = true;
-                    }
-                }
-
-                //basisu
-                if (useBasisUniversal) {
-                    mAsset->extensionsUsed.KHR_texture_basisu = true;
-                    mAsset->extensionsRequired.KHR_texture_basisu = true;
-                }
-
-                GetTexSampler(mat, texture, tt, slot);
-            }
-        }
-    }
-}
-
-void glTF2Exporter::GetMatTex(const aiMaterial &mat, TextureInfo &prop, aiTextureType tt, unsigned int slot = 0) {
-    Ref<Texture> &texture = prop.texture;
-    GetMatTex(mat, texture, prop.texCoord, tt, slot);
-}
-
-void glTF2Exporter::GetMatTex(const aiMaterial &mat, NormalTextureInfo &prop, aiTextureType tt, unsigned int slot = 0) {
-    Ref<Texture> &texture = prop.texture;
-
-    GetMatTex(mat, texture, prop.texCoord, tt, slot);
-
-    if (texture) {
-        //GetMatTexProp(mat, prop.texCoord, "texCoord", tt, slot);
-        GetMatTexProp(mat, prop.scale, "scale", tt, slot);
-    }
-}
-
-void glTF2Exporter::GetMatTex(const aiMaterial &mat, OcclusionTextureInfo &prop, aiTextureType tt, unsigned int slot = 0) {
-    Ref<Texture> &texture = prop.texture;
-
-    GetMatTex(mat, texture, prop.texCoord, tt, slot);
-
-    if (texture) {
-        //GetMatTexProp(mat, prop.texCoord, "texCoord", tt, slot);
-        GetMatTexProp(mat, prop.strength, "strength", tt, slot);
-    }
-}
-
-aiReturn glTF2Exporter::GetMatColor(const aiMaterial &mat, vec4 &prop, const char *propName, int type, int idx) const {
-    aiColor4D col;
-    aiReturn result = mat.Get(propName, type, idx, col);
-
-    if (result == AI_SUCCESS) {
-        prop[0] = col.r;
-        prop[1] = col.g;
-        prop[2] = col.b;
-        prop[3] = col.a;
-    }
-
-    return result;
-}
-
-aiReturn glTF2Exporter::GetMatColor(const aiMaterial &mat, vec3 &prop, const char *propName, int type, int idx) const {
-    aiColor3D col;
-    aiReturn result = mat.Get(propName, type, idx, col);
-
-    if (result == AI_SUCCESS) {
-        prop[0] = col.r;
-        prop[1] = col.g;
-        prop[2] = col.b;
-    }
-
-    return result;
-}
-
-bool glTF2Exporter::GetMatSpecGloss(const aiMaterial &mat, glTF2::PbrSpecularGlossiness &pbrSG) {
-    bool result = false;
-    // If has Glossiness, a Specular Color or Specular Texture, use the KHR_materials_pbrSpecularGlossiness extension
-    // NOTE: This extension is being considered for deprecation (Dec 2020), may be replaced by KHR_material_specular
-
-    if (mat.Get(AI_MATKEY_GLOSSINESS_FACTOR, pbrSG.glossinessFactor) == AI_SUCCESS) {
-        result = true;
-    } else {
-        // Don't have explicit glossiness, convert from pbr roughness or legacy shininess
-        float shininess;
-        if (mat.Get(AI_MATKEY_ROUGHNESS_FACTOR, shininess) == AI_SUCCESS) {
-            pbrSG.glossinessFactor = 1.0f - shininess; // Extension defines this way
-        } else if (mat.Get(AI_MATKEY_SHININESS, shininess) == AI_SUCCESS) {
-            pbrSG.glossinessFactor = shininess / 1000;
-        }
-    }
-
-    if (GetMatColor(mat, pbrSG.specularFactor, AI_MATKEY_COLOR_SPECULAR) == AI_SUCCESS) {
-        result = true;
-    }
-    // Add any appropriate textures
-    GetMatTex(mat, pbrSG.specularGlossinessTexture, aiTextureType_SPECULAR);
-
-    result = result || pbrSG.specularGlossinessTexture.texture;
-
-    if (result) {
-        // Likely to always have diffuse
-        GetMatTex(mat, pbrSG.diffuseTexture, aiTextureType_DIFFUSE);
-        GetMatColor(mat, pbrSG.diffuseFactor, AI_MATKEY_COLOR_DIFFUSE);
-    }
-
-    return result;
-}
-
-bool glTF2Exporter::GetMatSheen(const aiMaterial &mat, glTF2::MaterialSheen &sheen) {
-    // Return true if got any valid Sheen properties or textures
-    if (GetMatColor(mat, sheen.sheenColorFactor, AI_MATKEY_SHEEN_COLOR_FACTOR) != aiReturn_SUCCESS) {
-        return false;
-    }
-
-    // Default Sheen color factor {0,0,0} disables Sheen, so do not export
-    if (sheen.sheenColorFactor == defaultSheenFactor) {
-        return false;
-    }
-
-    mat.Get(AI_MATKEY_SHEEN_ROUGHNESS_FACTOR, sheen.sheenRoughnessFactor);
-
-    GetMatTex(mat, sheen.sheenColorTexture, AI_MATKEY_SHEEN_COLOR_TEXTURE);
-    GetMatTex(mat, sheen.sheenRoughnessTexture, AI_MATKEY_SHEEN_ROUGHNESS_TEXTURE);
-
-    return true;
-}
-
-bool glTF2Exporter::GetMatClearcoat(const aiMaterial &mat, glTF2::MaterialClearcoat &clearcoat) {
-    if (mat.Get(AI_MATKEY_CLEARCOAT_FACTOR, clearcoat.clearcoatFactor) != aiReturn_SUCCESS) {
-        return false;
-    }
-
-    // Clearcoat factor of zero disables Clearcoat, so do not export
-    if (clearcoat.clearcoatFactor == 0.0f)
-        return false;
-
-    mat.Get(AI_MATKEY_CLEARCOAT_ROUGHNESS_FACTOR, clearcoat.clearcoatRoughnessFactor);
-
-    GetMatTex(mat, clearcoat.clearcoatTexture, AI_MATKEY_CLEARCOAT_TEXTURE);
-    GetMatTex(mat, clearcoat.clearcoatRoughnessTexture, AI_MATKEY_CLEARCOAT_ROUGHNESS_TEXTURE);
-    GetMatTex(mat, clearcoat.clearcoatNormalTexture, AI_MATKEY_CLEARCOAT_NORMAL_TEXTURE);
-
-    return true;
-}
-
-bool glTF2Exporter::GetMatTransmission(const aiMaterial &mat, glTF2::MaterialTransmission &transmission) {
-    bool result = mat.Get(AI_MATKEY_TRANSMISSION_FACTOR, transmission.transmissionFactor) == aiReturn_SUCCESS;
-    GetMatTex(mat, transmission.transmissionTexture, AI_MATKEY_TRANSMISSION_TEXTURE);
-    return result || transmission.transmissionTexture.texture;
-}
-
-bool glTF2Exporter::GetMatVolume(const aiMaterial &mat, glTF2::MaterialVolume &volume) {
-    bool result = mat.Get(AI_MATKEY_VOLUME_THICKNESS_FACTOR, volume.thicknessFactor) != aiReturn_SUCCESS;
-
-    GetMatTex(mat, volume.thicknessTexture, AI_MATKEY_VOLUME_THICKNESS_TEXTURE);
-
-    result = result || mat.Get(AI_MATKEY_VOLUME_ATTENUATION_DISTANCE, volume.attenuationDistance);
-    result = result || GetMatColor(mat, volume.attenuationColor, AI_MATKEY_VOLUME_ATTENUATION_COLOR) != aiReturn_SUCCESS;
-
-    // Valid if any of these properties are available
-    return result || volume.thicknessTexture.texture;
-}
-
-bool glTF2Exporter::GetMatIOR(const aiMaterial &mat, glTF2::MaterialIOR &ior) {
-    return mat.Get(AI_MATKEY_REFRACTI, ior.ior) == aiReturn_SUCCESS;
-}
-
-void glTF2Exporter::ExportMaterials() {
-    aiString aiName;
-    for (unsigned int i = 0; i < mScene->mNumMaterials; ++i) {
-        ai_assert(mScene->mMaterials[i] != nullptr);
-
-        const aiMaterial &mat = *(mScene->mMaterials[i]);
-
-        std::string id = "material_" + ai_to_string(i);
-
-        Ref<Material> m = mAsset->materials.Create(id);
-
-        std::string name;
-        if (mat.Get(AI_MATKEY_NAME, aiName) == AI_SUCCESS) {
-            name = aiName.C_Str();
-        }
-        name = mAsset->FindUniqueID(name, "material");
-
-        m->name = name;
-
-        GetMatTex(mat, m->pbrMetallicRoughness.baseColorTexture, aiTextureType_BASE_COLOR);
-
-        if (!m->pbrMetallicRoughness.baseColorTexture.texture) {
-            //if there wasn't a baseColorTexture defined in the source, fallback to any diffuse texture
-            GetMatTex(mat, m->pbrMetallicRoughness.baseColorTexture, aiTextureType_DIFFUSE);
-        }
-
-        GetMatTex(mat, m->pbrMetallicRoughness.metallicRoughnessTexture, AI_MATKEY_GLTF_PBRMETALLICROUGHNESS_METALLICROUGHNESS_TEXTURE);
-
-        if (GetMatColor(mat, m->pbrMetallicRoughness.baseColorFactor, AI_MATKEY_BASE_COLOR) != AI_SUCCESS) {
-            // if baseColorFactor wasn't defined, then the source is likely not a metallic roughness material.
-            //a fallback to any diffuse color should be used instead
-            GetMatColor(mat, m->pbrMetallicRoughness.baseColorFactor, AI_MATKEY_COLOR_DIFFUSE);
-        }
-
-        if (mat.Get(AI_MATKEY_METALLIC_FACTOR, m->pbrMetallicRoughness.metallicFactor) != AI_SUCCESS) {
-            //if metallicFactor wasn't defined, then the source is likely not a PBR file, and the metallicFactor should be 0
-            m->pbrMetallicRoughness.metallicFactor = 0;
-        }
-
-        // get roughness if source is gltf2 file
-        if (mat.Get(AI_MATKEY_ROUGHNESS_FACTOR, m->pbrMetallicRoughness.roughnessFactor) != AI_SUCCESS) {
-            // otherwise, try to derive and convert from specular + shininess values
-            aiColor4D specularColor;
-            ai_real shininess;
-
-            if (mat.Get(AI_MATKEY_COLOR_SPECULAR, specularColor) == AI_SUCCESS && mat.Get(AI_MATKEY_SHININESS, shininess) == AI_SUCCESS) {
-                // convert specular color to luminance
-                float specularIntensity = specularColor[0] * 0.2125f + specularColor[1] * 0.7154f + specularColor[2] * 0.0721f;
-                //normalize shininess (assuming max is 1000) with an inverse exponentional curve
-                float normalizedShininess = std::sqrt(shininess / 1000);
-
-                //clamp the shininess value between 0 and 1
-                normalizedShininess = std::min(std::max(normalizedShininess, 0.0f), 1.0f);
-                // low specular intensity values should produce a rough material even if shininess is high.
-                normalizedShininess = normalizedShininess * specularIntensity;
-
-                m->pbrMetallicRoughness.roughnessFactor = 1 - normalizedShininess;
-            }
-        }
-
-        GetMatTex(mat, m->normalTexture, aiTextureType_NORMALS);
-        GetMatTex(mat, m->occlusionTexture, aiTextureType_LIGHTMAP);
-        GetMatTex(mat, m->emissiveTexture, aiTextureType_EMISSIVE);
-        GetMatColor(mat, m->emissiveFactor, AI_MATKEY_COLOR_EMISSIVE);
-
-        mat.Get(AI_MATKEY_TWOSIDED, m->doubleSided);
-        mat.Get(AI_MATKEY_GLTF_ALPHACUTOFF, m->alphaCutoff);
-
-        float opacity;
-        aiString alphaMode;
-
-        if (mat.Get(AI_MATKEY_OPACITY, opacity) == AI_SUCCESS) {
-            if (opacity < 1) {
-                m->alphaMode = "BLEND";
-                m->pbrMetallicRoughness.baseColorFactor[3] *= opacity;
-            }
-        }
-        if (mat.Get(AI_MATKEY_GLTF_ALPHAMODE, alphaMode) == AI_SUCCESS) {
-            m->alphaMode = alphaMode.C_Str();
-        }
-
-        {
-            // KHR_materials_pbrSpecularGlossiness extension
-            // NOTE: This extension is being considered for deprecation (Dec 2020)
-            PbrSpecularGlossiness pbrSG;
-            if (GetMatSpecGloss(mat, pbrSG)) {
-                mAsset->extensionsUsed.KHR_materials_pbrSpecularGlossiness = true;
-                m->pbrSpecularGlossiness = Nullable<PbrSpecularGlossiness>(pbrSG);
-            }
-        }
-
-        // glTFv2 is either PBR or Unlit
-        aiShadingMode shadingMode = aiShadingMode_PBR_BRDF;
-        mat.Get(AI_MATKEY_SHADING_MODEL, shadingMode);
-        if (shadingMode == aiShadingMode_Unlit) {
-            mAsset->extensionsUsed.KHR_materials_unlit = true;
-            m->unlit = true;
-        } else {
-            // These extensions are not compatible with KHR_materials_unlit or KHR_materials_pbrSpecularGlossiness
-            if (!m->pbrSpecularGlossiness.isPresent) {
-                // Sheen
-                MaterialSheen sheen;
-                if (GetMatSheen(mat, sheen)) {
-                    mAsset->extensionsUsed.KHR_materials_sheen = true;
-                    m->materialSheen = Nullable<MaterialSheen>(sheen);
-                }
-
-                MaterialClearcoat clearcoat;
-                if (GetMatClearcoat(mat, clearcoat)) {
-                    mAsset->extensionsUsed.KHR_materials_clearcoat = true;
-                    m->materialClearcoat = Nullable<MaterialClearcoat>(clearcoat);
-                }
-
-                MaterialTransmission transmission;
-                if (GetMatTransmission(mat, transmission)) {
-                    mAsset->extensionsUsed.KHR_materials_transmission = true;
-                    m->materialTransmission = Nullable<MaterialTransmission>(transmission);
-                }
-                
-                MaterialVolume volume;
-                if (GetMatVolume(mat, volume)) {
-                    mAsset->extensionsUsed.KHR_materials_volume = true;
-                    m->materialVolume = Nullable<MaterialVolume>(volume);
-                }
-                                
-                MaterialIOR ior;
-                if (GetMatIOR(mat, ior)) {
-                    mAsset->extensionsUsed.KHR_materials_ior = true;
-                    m->materialIOR = Nullable<MaterialIOR>(ior);
-                }
-            }
-        }
-    }
-}
-
-/*
- * Search through node hierarchy and find the node containing the given meshID.
- * Returns true on success, and false otherwise.
- */
-bool FindMeshNode(Ref<Node> &nodeIn, Ref<Node> &meshNode, const std::string &meshID) {
-    for (unsigned int i = 0; i < nodeIn->meshes.size(); ++i) {
-        if (meshID.compare(nodeIn->meshes[i]->id) == 0) {
-            meshNode = nodeIn;
-            return true;
-        }
-    }
-
-    for (unsigned int i = 0; i < nodeIn->children.size(); ++i) {
-        if (FindMeshNode(nodeIn->children[i], meshNode, meshID)) {
-            return true;
-        }
-    }
-
-    return false;
-}
-
-/*
- * Find the root joint of the skeleton.
- * Starts will any joint node and traces up the tree,
- * until a parent is found that does not have a jointName.
- * Returns the first parent Ref<Node> found that does not have a jointName.
- */
-Ref<Node> FindSkeletonRootJoint(Ref<Skin> &skinRef) {
-    Ref<Node> startNodeRef;
-    Ref<Node> parentNodeRef;
-
-    // Arbitrarily use the first joint to start the search.
-    startNodeRef = skinRef->jointNames[0];
-    parentNodeRef = skinRef->jointNames[0];
-
-    do {
-        startNodeRef = parentNodeRef;
-        parentNodeRef = startNodeRef->parent;
-    } while (!parentNodeRef->jointName.empty());
-
-    return parentNodeRef;
-}
-
-void ExportSkin(Asset &mAsset, const aiMesh *aimesh, Ref<Mesh> &meshRef, Ref<Buffer> &bufferRef, Ref<Skin> &skinRef, 
-        std::vector<aiMatrix4x4> &inverseBindMatricesData) {
-    if (aimesh->mNumBones < 1) {
-        return;
-    }
-
-    // Store the vertex joint and weight data.
-    const size_t NumVerts(aimesh->mNumVertices);
-    vec4 *vertexJointData = new vec4[NumVerts];
-    vec4 *vertexWeightData = new vec4[NumVerts];
-    int *jointsPerVertex = new int[NumVerts];
-    for (size_t i = 0; i < NumVerts; ++i) {
-        jointsPerVertex[i] = 0;
-        for (size_t j = 0; j < 4; ++j) {
-            vertexJointData[i][j] = 0;
-            vertexWeightData[i][j] = 0;
-        }
-    }
-
-    for (unsigned int idx_bone = 0; idx_bone < aimesh->mNumBones; ++idx_bone) {
-        const aiBone *aib = aimesh->mBones[idx_bone];
-
-        // aib->mName   =====>  skinRef->jointNames
-        // Find the node with id = mName.
-        Ref<Node> nodeRef = mAsset.nodes.Get(aib->mName.C_Str());
-        nodeRef->jointName = nodeRef->name;
-
-        unsigned int jointNamesIndex = 0;
-        bool addJointToJointNames = true;
-        for (unsigned int idx_joint = 0; idx_joint < skinRef->jointNames.size(); ++idx_joint) {
-            if (skinRef->jointNames[idx_joint]->jointName.compare(nodeRef->jointName) == 0) {
-                addJointToJointNames = false;
-                jointNamesIndex = idx_joint;
-            }
-        }
-
-        if (addJointToJointNames) {
-            skinRef->jointNames.push_back(nodeRef);
-
-            // aib->mOffsetMatrix   =====>  skinRef->inverseBindMatrices
-            aiMatrix4x4 tmpMatrix4;
-            CopyValue(aib->mOffsetMatrix, tmpMatrix4);
-            inverseBindMatricesData.push_back(tmpMatrix4);
-            jointNamesIndex = static_cast<unsigned int>(inverseBindMatricesData.size() - 1);
-        }
-
-        // aib->mWeights   =====>  vertexWeightData
-        for (unsigned int idx_weights = 0; idx_weights < aib->mNumWeights; ++idx_weights) {
-            unsigned int vertexId = aib->mWeights[idx_weights].mVertexId;
-            float vertWeight = aib->mWeights[idx_weights].mWeight;
-
-            // A vertex can only have at most four joint weights, which ideally sum up to 1
-            if (IsBoneWeightFitted(vertexWeightData[vertexId])) {
-                continue;
-            }
-            if (jointsPerVertex[vertexId] > 3) {
-                int boneIndexFitted = FitBoneWeight(vertexWeightData[vertexId], vertWeight);
-                if (boneIndexFitted != -1) {
-                    vertexJointData[vertexId][boneIndexFitted] = static_cast<float>(jointNamesIndex);
-                }
-            }else {
-                vertexJointData[vertexId][jointsPerVertex[vertexId]] = static_cast<float>(jointNamesIndex);
-                vertexWeightData[vertexId][jointsPerVertex[vertexId]] = vertWeight;
-
-                jointsPerVertex[vertexId] += 1;   
-            }
-        }
-
-    } // End: for-loop mNumMeshes
-
-    Mesh::Primitive &p = meshRef->primitives.back();
-    Ref<Accessor> vertexJointAccessor = ExportData(mAsset, skinRef->id, bufferRef, aimesh->mNumVertices, 
-        vertexJointData, AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT);
-    if (vertexJointAccessor) {
-        size_t offset = vertexJointAccessor->bufferView->byteOffset;
-        size_t bytesLen = vertexJointAccessor->bufferView->byteLength;
-        unsigned int s_bytesPerComp = ComponentTypeSize(ComponentType_UNSIGNED_SHORT);
-        unsigned int bytesPerComp = ComponentTypeSize(vertexJointAccessor->componentType);
-        size_t s_bytesLen = bytesLen * s_bytesPerComp / bytesPerComp;
-        Ref<Buffer> buf = vertexJointAccessor->bufferView->buffer;
-        uint8_t *arrys = new uint8_t[bytesLen];
-        unsigned int i = 0;
-        for (unsigned int j = 0; j < bytesLen; j += bytesPerComp) {
-            size_t len_p = offset + j;
-            float f_value = *(float *)&buf->GetPointer()[len_p];
-            unsigned short c = static_cast<unsigned short>(f_value);
-            memcpy(&arrys[i * s_bytesPerComp], &c, s_bytesPerComp);
-            ++i;
-        }
-        buf->ReplaceData_joint(offset, bytesLen, arrys, bytesLen);
-        vertexJointAccessor->componentType = ComponentType_UNSIGNED_SHORT;
-        vertexJointAccessor->bufferView->byteLength = s_bytesLen;
-
-        p.attributes.joint.push_back(vertexJointAccessor);
-        delete[] arrys;
-    }
-
-    Ref<Accessor> vertexWeightAccessor = ExportData(mAsset, skinRef->id, bufferRef, aimesh->mNumVertices,
-            vertexWeightData, AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT);
-    if (vertexWeightAccessor) {
-        p.attributes.weight.push_back(vertexWeightAccessor);
-    }
-    delete[] jointsPerVertex;
-    delete[] vertexWeightData;
-    delete[] vertexJointData;
-}
-
-void glTF2Exporter::ExportMeshes() {
-    typedef decltype(aiFace::mNumIndices) IndicesType;
-
-    std::string fname = std::string(mFilename);
-    std::string bufferIdPrefix = fname.substr(0, fname.rfind(".gltf"));
-    std::string bufferId = mAsset->FindUniqueID("", bufferIdPrefix.c_str());
-
-    Ref<Buffer> b = mAsset->GetBodyBuffer();
-    if (!b) {
-        b = mAsset->buffers.Create(bufferId);
-    }
-
-    //----------------------------------------
-    // Initialize variables for the skin
-    bool createSkin = false;
-    for (unsigned int idx_mesh = 0; idx_mesh < mScene->mNumMeshes; ++idx_mesh) {
-        const aiMesh *aim = mScene->mMeshes[idx_mesh];
-        if (aim->HasBones()) {
-            createSkin = true;
-            break;
-        }
-    }
-
-    Ref<Skin> skinRef;
-    std::string skinName = mAsset->FindUniqueID("skin", "skin");
-    std::vector<aiMatrix4x4> inverseBindMatricesData;
-    if (createSkin) {
-        skinRef = mAsset->skins.Create(skinName);
-        skinRef->name = skinName;
-    }
-    //----------------------------------------
-
-    for (unsigned int idx_mesh = 0; idx_mesh < mScene->mNumMeshes; ++idx_mesh) {
-        const aiMesh *aim = mScene->mMeshes[idx_mesh];
-
-        std::string name = aim->mName.C_Str();
-
-        std::string meshId = mAsset->FindUniqueID(name, "mesh");
-        Ref<Mesh> m = mAsset->meshes.Create(meshId);
-        m->primitives.resize(1);
-        Mesh::Primitive &p = m->primitives.back();
-
-        m->name = name;
-
-        p.material = mAsset->materials.Get(aim->mMaterialIndex);
-        p.ngonEncoded = (aim->mPrimitiveTypes & aiPrimitiveType_NGONEncodingFlag) != 0;
-
-        /******************* Vertices ********************/
-        Ref<Accessor> v = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mVertices, AttribType::VEC3,
-            AttribType::VEC3, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
-        if (v) {
-            p.attributes.position.push_back(v);
-        }
-
-        /******************** Normals ********************/
-        // Normalize all normals as the validator can emit a warning otherwise
-        if (nullptr != aim->mNormals) {
-            for (auto i = 0u; i < aim->mNumVertices; ++i) {
-                aim->mNormals[i].NormalizeSafe();
-            }
-        }
-
-        Ref<Accessor> n = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mNormals, AttribType::VEC3, 
-            AttribType::VEC3, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
-        if (n) {
-            p.attributes.normal.push_back(n);
-        }
-
-        /************** Texture coordinates **************/
-        for (int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
-            if (!aim->HasTextureCoords(i)) {
-                continue;
-            }
-
-            // Flip UV y coords
-            if (aim->mNumUVComponents[i] > 1) {
-                for (unsigned int j = 0; j < aim->mNumVertices; ++j) {
-                    aim->mTextureCoords[i][j].y = 1 - aim->mTextureCoords[i][j].y;
-                }
-            }
-
-            if (aim->mNumUVComponents[i] > 0) {
-                AttribType::Value type = (aim->mNumUVComponents[i] == 2) ? AttribType::VEC2 : AttribType::VEC3;
-
-                Ref<Accessor> tc = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mTextureCoords[i], 
-                    AttribType::VEC3, type, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
-                if (tc) {
-                    p.attributes.texcoord.push_back(tc);
-                }
-            }
-        }
-
-        /*************** Vertex colors ****************/
-        for (unsigned int indexColorChannel = 0; indexColorChannel < aim->GetNumColorChannels(); ++indexColorChannel) {
-            Ref<Accessor> c = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mColors[indexColorChannel],
-                AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT, BufferViewTarget_ARRAY_BUFFER);
-            if (c) {
-                p.attributes.color.push_back(c);
-            }
-        }
-
-        /*************** Vertices indices ****************/
-        if (aim->mNumFaces > 0) {
-            std::vector<IndicesType> indices;
-            unsigned int nIndicesPerFace = aim->mFaces[0].mNumIndices;
-            indices.resize(aim->mNumFaces * nIndicesPerFace);
-            for (size_t i = 0; i < aim->mNumFaces; ++i) {
-                for (size_t j = 0; j < nIndicesPerFace; ++j) {
-                    indices[i * nIndicesPerFace + j] = IndicesType(aim->mFaces[i].mIndices[j]);
-                }
-            }
-
-            p.indices = ExportData(*mAsset, meshId, b, indices.size(), &indices[0], AttribType::SCALAR, AttribType::SCALAR, 
-                ComponentType_UNSIGNED_INT, BufferViewTarget_ELEMENT_ARRAY_BUFFER);
-        }
-
-        switch (aim->mPrimitiveTypes) {
-        case aiPrimitiveType_POLYGON:
-            p.mode = PrimitiveMode_TRIANGLES;
-            break; // TODO implement this
-        case aiPrimitiveType_LINE:
-            p.mode = PrimitiveMode_LINES;
-            break;
-        case aiPrimitiveType_POINT:
-            p.mode = PrimitiveMode_POINTS;
-            break;
-        default: // aiPrimitiveType_TRIANGLE
-            p.mode = PrimitiveMode_TRIANGLES;
-            break;
-        }
-
-        /*************** Skins ****************/
-        if (aim->HasBones()) {
-            ExportSkin(*mAsset, aim, m, b, skinRef, inverseBindMatricesData);
-        }
-
-        /*************** Targets for blendshapes ****************/
-        if (aim->mNumAnimMeshes > 0) {
-            bool bUseSparse = this->mProperties->HasPropertyBool("GLTF2_SPARSE_ACCESSOR_EXP") &&
-                              this->mProperties->GetPropertyBool("GLTF2_SPARSE_ACCESSOR_EXP");
-            bool bIncludeNormal = this->mProperties->HasPropertyBool("GLTF2_TARGET_NORMAL_EXP") &&
-                                  this->mProperties->GetPropertyBool("GLTF2_TARGET_NORMAL_EXP");
-            bool bExportTargetNames = this->mProperties->HasPropertyBool("GLTF2_TARGETNAMES_EXP") &&
-                                      this->mProperties->GetPropertyBool("GLTF2_TARGETNAMES_EXP");
-
-            p.targets.resize(aim->mNumAnimMeshes);
-            for (unsigned int am = 0; am < aim->mNumAnimMeshes; ++am) {
-                aiAnimMesh *pAnimMesh = aim->mAnimMeshes[am];
-                if (bExportTargetNames) {
-                    m->targetNames.emplace_back(pAnimMesh->mName.data);
-                }
-                // position
-                if (pAnimMesh->HasPositions()) {
-                    // NOTE: in gltf it is the diff stored
-                    aiVector3D *pPositionDiff = new aiVector3D[pAnimMesh->mNumVertices];
-                    for (unsigned int vt = 0; vt < pAnimMesh->mNumVertices; ++vt) {
-                        pPositionDiff[vt] = pAnimMesh->mVertices[vt] - aim->mVertices[vt];
-                    }
-                    Ref<Accessor> vec;
-                    if (bUseSparse) {
-                        vec = ExportDataSparse(*mAsset, meshId, b,
-                                pAnimMesh->mNumVertices, pPositionDiff,
-                                AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
-                    } else {
-                        vec = ExportData(*mAsset, meshId, b,
-                                pAnimMesh->mNumVertices, pPositionDiff,
-                                AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
-                    }
-                    if (vec) {
-                        p.targets[am].position.push_back(vec);
-                    }
-                    delete[] pPositionDiff;
-                }
-
-                // normal
-                if (pAnimMesh->HasNormals() && bIncludeNormal) {
-                    aiVector3D *pNormalDiff = new aiVector3D[pAnimMesh->mNumVertices];
-                    for (unsigned int vt = 0; vt < pAnimMesh->mNumVertices; ++vt) {
-                        pNormalDiff[vt] = pAnimMesh->mNormals[vt] - aim->mNormals[vt];
-                    }
-                    Ref<Accessor> vec;
-                    if (bUseSparse) {
-                        vec = ExportDataSparse(*mAsset, meshId, b,
-                                pAnimMesh->mNumVertices, pNormalDiff,
-                                AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
-                    } else {
-                        vec = ExportData(*mAsset, meshId, b,
-                                pAnimMesh->mNumVertices, pNormalDiff,
-                                AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
-                    }
-                    if (vec) {
-                        p.targets[am].normal.push_back(vec);
-                    }
-                    delete[] pNormalDiff;
-                }
-
-                // tangent?
-            }
-        }
-    }
-
-    //----------------------------------------
-    // Finish the skin
-    // Create the Accessor for skinRef->inverseBindMatrices
-    bool bAddCustomizedProperty = this->mProperties->HasPropertyBool("GLTF2_CUSTOMIZE_PROPERTY");
-    if (createSkin) {
-        mat4 *invBindMatrixData = new mat4[inverseBindMatricesData.size()];
-        for (unsigned int idx_joint = 0; idx_joint < inverseBindMatricesData.size(); ++idx_joint) {
-            CopyValue(inverseBindMatricesData[idx_joint], invBindMatrixData[idx_joint]);
-        }
-
-        Ref<Accessor> invBindMatrixAccessor = ExportData(*mAsset, skinName, b,
-                static_cast<unsigned int>(inverseBindMatricesData.size()),
-                invBindMatrixData, AttribType::MAT4, AttribType::MAT4, ComponentType_FLOAT);
-        if (invBindMatrixAccessor) {
-            skinRef->inverseBindMatrices = invBindMatrixAccessor;
-        }
-
-        // Identity Matrix   =====>  skinRef->bindShapeMatrix
-        // Temporary. Hard-coded identity matrix here
-        skinRef->bindShapeMatrix.isPresent = bAddCustomizedProperty;
-        IdentityMatrix4(skinRef->bindShapeMatrix.value);
-
-        // Find nodes that contain a mesh with bones and add "skeletons" and "skin" attributes to those nodes.
-        Ref<Node> rootNode = mAsset->nodes.Get(unsigned(0));
-        Ref<Node> meshNode;
-        for (unsigned int meshIndex = 0; meshIndex < mAsset->meshes.Size(); ++meshIndex) {
-            Ref<Mesh> mesh = mAsset->meshes.Get(meshIndex);
-            bool hasBones = false;
-            for (unsigned int i = 0; i < mesh->primitives.size(); ++i) {
-                if (!mesh->primitives[i].attributes.weight.empty()) {
-                    hasBones = true;
-                    break;
-                }
-            }
-            if (!hasBones) {
-                continue;
-            }
-            std::string meshID = mesh->id;
-            FindMeshNode(rootNode, meshNode, meshID);
-            Ref<Node> rootJoint = FindSkeletonRootJoint(skinRef);
-            if (bAddCustomizedProperty)
-                meshNode->skeletons.push_back(rootJoint);
-            meshNode->skin = skinRef;
-        }
-        delete[] invBindMatrixData;
-    }
-}
-
-// Merges a node's multiple meshes (with one primitive each) into one mesh with multiple primitives
-void glTF2Exporter::MergeMeshes() {
-    for (unsigned int n = 0; n < mAsset->nodes.Size(); ++n) {
-        Ref<Node> node = mAsset->nodes.Get(n);
-
-        unsigned int nMeshes = static_cast<unsigned int>(node->meshes.size());
-
-        //skip if it's 1 or less meshes per node
-        if (nMeshes > 1) {
-            Ref<Mesh> firstMesh = node->meshes.at(0);
-
-            //loop backwards to allow easy removal of a mesh from a node once it's merged
-            for (unsigned int m = nMeshes - 1; m >= 1; --m) {
-                Ref<Mesh> mesh = node->meshes.at(m);
-
-                //append this mesh's primitives to the first mesh's primitives
-                firstMesh->primitives.insert(
-                        firstMesh->primitives.end(),
-                        mesh->primitives.begin(),
-                        mesh->primitives.end());
-
-                //remove the mesh from the list of meshes
-                unsigned int removedIndex = mAsset->meshes.Remove(mesh->id.c_str());
-
-                //find the presence of the removed mesh in other nodes
-                for (unsigned int nn = 0; nn < mAsset->nodes.Size(); ++nn) {
-                    Ref<Node> curNode = mAsset->nodes.Get(nn);
-
-                    for (unsigned int mm = 0; mm < curNode->meshes.size(); ++mm) {
-                        Ref<Mesh> &meshRef = curNode->meshes.at(mm);
-                        unsigned int meshIndex = meshRef.GetIndex();
-
-                        if (meshIndex == removedIndex) {
-                            curNode->meshes.erase(curNode->meshes.begin() + mm);
-                        } else if (meshIndex > removedIndex) {
-                            Ref<Mesh> newMeshRef = mAsset->meshes.Get(meshIndex - 1);
-
-                            meshRef = newMeshRef;
-                        }
-                    }
-                }
-            }
-
-            //since we were looping backwards, reverse the order of merged primitives to their original order
-            std::reverse(firstMesh->primitives.begin() + 1, firstMesh->primitives.end());
-        }
-    }
-}
-
-/*
- * Export the root node of the node hierarchy.
- * Calls ExportNode for all children.
- */
-unsigned int glTF2Exporter::ExportNodeHierarchy(const aiNode *n) {
-    Ref<Node> node = mAsset->nodes.Create(mAsset->FindUniqueID(n->mName.C_Str(), "node"));
-
-    node->name = n->mName.C_Str();
-
-    if (!n->mTransformation.IsIdentity()) {
-        node->matrix.isPresent = true;
-        CopyValue(n->mTransformation, node->matrix.value);
-    }
-
-    for (unsigned int i = 0; i < n->mNumMeshes; ++i) {
-        node->meshes.emplace_back(mAsset->meshes.Get(n->mMeshes[i]));
-    }
-
-    for (unsigned int i = 0; i < n->mNumChildren; ++i) {
-        unsigned int idx = ExportNode(n->mChildren[i], node);
-        node->children.emplace_back(mAsset->nodes.Get(idx));
-    }
-
-    return node.GetIndex();
-}
-
-/*
- * Export node and recursively calls ExportNode for all children.
- * Since these nodes are not the root node, we also export the parent Ref<Node>
- */
-unsigned int glTF2Exporter::ExportNode(const aiNode *n, Ref<Node> &parent) {
-    std::string name = mAsset->FindUniqueID(n->mName.C_Str(), "node");
-    Ref<Node> node = mAsset->nodes.Create(name);
-
-    node->parent = parent;
-    node->name = name;
-
-    if (!n->mTransformation.IsIdentity()) {
-        if (mScene->mNumAnimations > 0 || (mProperties && mProperties->HasPropertyBool("GLTF2_NODE_IN_TRS"))) {
-            aiQuaternion quaternion;
-            n->mTransformation.Decompose(*reinterpret_cast<aiVector3D *>(&node->scale.value), quaternion, *reinterpret_cast<aiVector3D *>(&node->translation.value));
-
-            aiVector3D vector(static_cast<ai_real>(1.0f), static_cast<ai_real>(1.0f), static_cast<ai_real>(1.0f));
-            if (!reinterpret_cast<aiVector3D *>(&node->scale.value)->Equal(vector)) {
-                node->scale.isPresent = true;
-            }
-            if (!reinterpret_cast<aiVector3D *>(&node->translation.value)->Equal(vector)) {
-                node->translation.isPresent = true;
-            }
-            node->rotation.isPresent = true;
-            node->rotation.value[0] = quaternion.x;
-            node->rotation.value[1] = quaternion.y;
-            node->rotation.value[2] = quaternion.z;
-            node->rotation.value[3] = quaternion.w;
-            node->matrix.isPresent = false;
-        } else {
-            node->matrix.isPresent = true;
-            CopyValue(n->mTransformation, node->matrix.value);
-        }
-    }
-
-    for (unsigned int i = 0; i < n->mNumMeshes; ++i) {
-        node->meshes.emplace_back(mAsset->meshes.Get(n->mMeshes[i]));
-    }
-
-    for (unsigned int i = 0; i < n->mNumChildren; ++i) {
-        unsigned int idx = ExportNode(n->mChildren[i], node);
-        node->children.emplace_back(mAsset->nodes.Get(idx));
-    }
-
-    return node.GetIndex();
-}
-
-void glTF2Exporter::ExportScene() {
-    // Use the name of the scene if specified
-    const std::string sceneName = (mScene->mName.length > 0) ? mScene->mName.C_Str() : "defaultScene";
-
-    // Ensure unique
-    Ref<Scene> scene = mAsset->scenes.Create(mAsset->FindUniqueID(sceneName, ""));
-
-    // root node will be the first one exported (idx 0)
-    if (mAsset->nodes.Size() > 0) {
-        scene->nodes.emplace_back(mAsset->nodes.Get(0u));
-    }
-
-    // set as the default scene
-    mAsset->scene = scene;
-}
-
-void glTF2Exporter::ExportMetadata() {
-    AssetMetadata &asset = mAsset->asset;
-    asset.version = "2.0";
-
-    char buffer[256];
-    ai_snprintf(buffer, 256, "Open Asset Import Library (assimp v%d.%d.%x)",
-            aiGetVersionMajor(), aiGetVersionMinor(), aiGetVersionRevision());
-
-    asset.generator = buffer;
-
-    // Copyright
-    aiString copyright_str;
-    if (mScene->mMetaData != nullptr && mScene->mMetaData->Get(AI_METADATA_SOURCE_COPYRIGHT, copyright_str)) {
-        asset.copyright = copyright_str.C_Str();
-    }
-}
-
-inline Ref<Accessor> GetSamplerInputRef(Asset &asset, std::string &animId, Ref<Buffer> &buffer, std::vector<ai_real> &times) {
-    return ExportData(asset, animId, buffer, (unsigned int)times.size(), &times[0], AttribType::SCALAR, AttribType::SCALAR, ComponentType_FLOAT);
-}
-
-inline void ExtractTranslationSampler(Asset &asset, std::string &animId, Ref<Buffer> &buffer, const aiNodeAnim *nodeChannel, float ticksPerSecond, Animation::Sampler &sampler) {
-    const unsigned int numKeyframes = nodeChannel->mNumPositionKeys;
-
-    std::vector<ai_real> times(numKeyframes);
-    std::vector<ai_real> values(numKeyframes * 3);
-    for (unsigned int i = 0; i < numKeyframes; ++i) {
-        const aiVectorKey &key = nodeChannel->mPositionKeys[i];
-        // mTime is measured in ticks, but GLTF time is measured in seconds, so convert.
-        times[i] = static_cast<float>(key.mTime / ticksPerSecond);
-        values[(i * 3) + 0] = (ai_real) key.mValue.x;
-        values[(i * 3) + 1] = (ai_real) key.mValue.y;
-        values[(i * 3) + 2] = (ai_real) key.mValue.z;
-    }
-
-    sampler.input = GetSamplerInputRef(asset, animId, buffer, times);
-    sampler.output = ExportData(asset, animId, buffer, numKeyframes, &values[0], AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
-    sampler.interpolation = Interpolation_LINEAR;
-}
-
-inline void ExtractScaleSampler(Asset &asset, std::string &animId, Ref<Buffer> &buffer, const aiNodeAnim *nodeChannel, float ticksPerSecond, Animation::Sampler &sampler) {
-    const unsigned int numKeyframes = nodeChannel->mNumScalingKeys;
-
-    std::vector<ai_real> times(numKeyframes);
-    std::vector<ai_real> values(numKeyframes * 3);
-    for (unsigned int i = 0; i < numKeyframes; ++i) {
-        const aiVectorKey &key = nodeChannel->mScalingKeys[i];
-        // mTime is measured in ticks, but GLTF time is measured in seconds, so convert.
-        times[i] = static_cast<float>(key.mTime / ticksPerSecond);
-        values[(i * 3) + 0] = (ai_real) key.mValue.x;
-        values[(i * 3) + 1] = (ai_real) key.mValue.y;
-        values[(i * 3) + 2] = (ai_real) key.mValue.z;
-    }
-
-    sampler.input = GetSamplerInputRef(asset, animId, buffer, times);
-    sampler.output = ExportData(asset, animId, buffer, numKeyframes, &values[0], AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
-    sampler.interpolation = Interpolation_LINEAR;
-}
-
-inline void ExtractRotationSampler(Asset &asset, std::string &animId, Ref<Buffer> &buffer, const aiNodeAnim *nodeChannel, float ticksPerSecond, Animation::Sampler &sampler) {
-    const unsigned int numKeyframes = nodeChannel->mNumRotationKeys;
-
-    std::vector<ai_real> times(numKeyframes);
-    std::vector<ai_real> values(numKeyframes * 4);
-    for (unsigned int i = 0; i < numKeyframes; ++i) {
-        const aiQuatKey &key = nodeChannel->mRotationKeys[i];
-        // mTime is measured in ticks, but GLTF time is measured in seconds, so convert.
-        times[i] = static_cast<float>(key.mTime / ticksPerSecond);
-        values[(i * 4) + 0] = (ai_real) key.mValue.x;
-        values[(i * 4) + 1] = (ai_real) key.mValue.y;
-        values[(i * 4) + 2] = (ai_real) key.mValue.z;
-        values[(i * 4) + 3] = (ai_real) key.mValue.w;
-    }
-
-    sampler.input = GetSamplerInputRef(asset, animId, buffer, times);
-    sampler.output = ExportData(asset, animId, buffer, numKeyframes, &values[0], AttribType::VEC4, AttribType::VEC4, ComponentType_FLOAT);
-    sampler.interpolation = Interpolation_LINEAR;
-}
-
-static void AddSampler(Ref<Animation> &animRef, Ref<Node> &nodeRef, Animation::Sampler &sampler, AnimationPath path) {
-    Animation::Channel channel;
-    channel.sampler = static_cast<int>(animRef->samplers.size());
-    channel.target.path = path;
-    channel.target.node = nodeRef;
-    animRef->channels.push_back(channel);
-    animRef->samplers.push_back(sampler);
-}
-
-void glTF2Exporter::ExportAnimations() {
-    Ref<Buffer> bufferRef = mAsset->buffers.Get(unsigned(0));
-
-    for (unsigned int i = 0; i < mScene->mNumAnimations; ++i) {
-        const aiAnimation *anim = mScene->mAnimations[i];
-        const float ticksPerSecond = static_cast<float>(anim->mTicksPerSecond);
-
-        std::string nameAnim = "anim";
-        if (anim->mName.length > 0) {
-            nameAnim = anim->mName.C_Str();
-        }
-        Ref<Animation> animRef = mAsset->animations.Create(nameAnim);
-        animRef->name = nameAnim;
-
-        for (unsigned int channelIndex = 0; channelIndex < anim->mNumChannels; ++channelIndex) {
-            const aiNodeAnim *nodeChannel = anim->mChannels[channelIndex];
-
-            std::string name = nameAnim + "_" + ai_to_string(channelIndex);
-            name = mAsset->FindUniqueID(name, "animation");
-
-            Ref<Node> animNode = mAsset->nodes.Get(nodeChannel->mNodeName.C_Str());
-
-            if (nodeChannel->mNumPositionKeys > 0) {
-                Animation::Sampler translationSampler;
-                ExtractTranslationSampler(*mAsset, name, bufferRef, nodeChannel, ticksPerSecond, translationSampler);
-                AddSampler(animRef, animNode, translationSampler, AnimationPath_TRANSLATION);
-            }
-
-            if (nodeChannel->mNumRotationKeys > 0) {
-                Animation::Sampler rotationSampler;
-                ExtractRotationSampler(*mAsset, name, bufferRef, nodeChannel, ticksPerSecond, rotationSampler);
-                AddSampler(animRef, animNode, rotationSampler, AnimationPath_ROTATION);
-            }
-
-            if (nodeChannel->mNumScalingKeys > 0) {
-                Animation::Sampler scaleSampler;
-                ExtractScaleSampler(*mAsset, name, bufferRef, nodeChannel, ticksPerSecond, scaleSampler);
-                AddSampler(animRef, animNode, scaleSampler, AnimationPath_SCALE);
-            }
-        }
-    } // End: for-loop mNumAnimations
-}
-
-#endif // ASSIMP_BUILD_NO_GLTF_EXPORTER
-#endif // ASSIMP_BUILD_NO_EXPORT
diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2Exporter.h b/libs/assimp/code/AssetLib/glTF2/glTF2Exporter.h
deleted file mode 100644
index 9942522..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2Exporter.h
+++ /dev/null
@@ -1,147 +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 GltfExporter.h
-* Declares the exporter class to write a scene to a gltf/glb file
-*/
-#ifndef AI_GLTF2EXPORTER_H_INC
-#define AI_GLTF2EXPORTER_H_INC
-
-#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
-
-#include <assimp/material.h>
-#include <assimp/types.h>
-
-#include <map>
-#include <memory>
-#include <sstream>
-#include <vector>
-
-struct aiScene;
-struct aiNode;
-struct aiMaterial;
-
-namespace glTFCommon {
-template <class T>
-class Ref;
-
-}
-
-namespace glTF2 {
-
-class Asset;
-
-struct TexProperty;
-struct TextureInfo;
-struct NormalTextureInfo;
-struct OcclusionTextureInfo;
-struct Node;
-struct Texture;
-struct PbrSpecularGlossiness;
-struct MaterialSheen;
-struct MaterialClearcoat;
-struct MaterialTransmission;
-struct MaterialVolume;
-struct MaterialIOR;
-
-// Vec/matrix types, as raw float arrays
-typedef float(vec2)[2];
-typedef float(vec3)[3];
-typedef float(vec4)[4];
-
-} // namespace glTF2
-
-namespace Assimp {
-class IOSystem;
-class IOStream;
-class ExportProperties;
-
-// ------------------------------------------------------------------------------------------------
-/** Helper class to export a given scene to an glTF file. */
-// ------------------------------------------------------------------------------------------------
-class glTF2Exporter {
-public:
-    /// Constructor for a specific scene to export
-    glTF2Exporter(const char *filename, IOSystem *pIOSystem, const aiScene *pScene,
-            const ExportProperties *pProperties, bool binary);
-    ~glTF2Exporter();
-
-protected:
-    void WriteBinaryData(IOStream *outfile, std::size_t sceneLength);
-    void GetTexSampler(const aiMaterial &mat, glTFCommon::Ref<glTF2::Texture> texture, aiTextureType tt, unsigned int slot);
-    void GetMatTexProp(const aiMaterial &mat, unsigned int &prop, const char *propName, aiTextureType tt, unsigned int idx);
-    void GetMatTexProp(const aiMaterial &mat, float &prop, const char *propName, aiTextureType tt, unsigned int idx);
-    void GetMatTex(const aiMaterial &mat, glTFCommon::Ref<glTF2::Texture> &texture, unsigned int &texCoord, aiTextureType tt, unsigned int slot);
-    void GetMatTex(const aiMaterial &mat, glTF2::TextureInfo &prop, aiTextureType tt, unsigned int slot);
-    void GetMatTex(const aiMaterial &mat, glTF2::NormalTextureInfo &prop, aiTextureType tt, unsigned int slot);
-    void GetMatTex(const aiMaterial &mat, glTF2::OcclusionTextureInfo &prop, aiTextureType tt, unsigned int slot);
-    aiReturn GetMatColor(const aiMaterial &mat, glTF2::vec4 &prop, const char *propName, int type, int idx) const;
-    aiReturn GetMatColor(const aiMaterial &mat, glTF2::vec3 &prop, const char *propName, int type, int idx) const;
-    bool GetMatSpecGloss(const aiMaterial &mat, glTF2::PbrSpecularGlossiness &pbrSG);
-    bool GetMatSheen(const aiMaterial &mat, glTF2::MaterialSheen &sheen);
-    bool GetMatClearcoat(const aiMaterial &mat, glTF2::MaterialClearcoat &clearcoat);
-    bool GetMatTransmission(const aiMaterial &mat, glTF2::MaterialTransmission &transmission);
-    bool GetMatVolume(const aiMaterial &mat, glTF2::MaterialVolume &volume);
-    bool GetMatIOR(const aiMaterial &mat, glTF2::MaterialIOR &ior);
-    void ExportMetadata();
-    void ExportMaterials();
-    void ExportMeshes();
-    void MergeMeshes();
-    unsigned int ExportNodeHierarchy(const aiNode *n);
-    unsigned int ExportNode(const aiNode *node, glTFCommon::Ref<glTF2::Node> &parent);
-    void ExportScene();
-    void ExportAnimations();
-
-private:
-    const char *mFilename;
-    IOSystem *mIOSystem;
-    const aiScene *mScene;
-    const ExportProperties *mProperties;
-    std::map<std::string, unsigned int> mTexturesByPath;
-    std::shared_ptr<glTF2::Asset> mAsset;
-    std::vector<unsigned char> mBodyData;
-};
-
-} // namespace Assimp
-
-#endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
-
-#endif // AI_GLTF2EXPORTER_H_INC
diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2Importer.cpp b/libs/assimp/code/AssetLib/glTF2/glTF2Importer.cpp
deleted file mode 100644
index 1f4cafd..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2Importer.cpp
+++ /dev/null
@@ -1,1637 +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.
-
-----------------------------------------------------------------------
-*/
-
-#if !defined(ASSIMP_BUILD_NO_GLTF_IMPORTER) && !defined(ASSIMP_BUILD_NO_GLTF2_IMPORTER)
-
-#include "AssetLib/glTF2/glTF2Importer.h"
-#include "PostProcessing/MakeVerboseFormat.h"
-#include "AssetLib/glTF2/glTF2Asset.h"
-
-#if !defined(ASSIMP_BUILD_NO_EXPORT)
-#include "AssetLib/glTF2/glTF2AssetWriter.h"
-#endif
-
-#include <assimp/CreateAnimMesh.h>
-#include <assimp/StringComparison.h>
-#include <assimp/StringUtils.h>
-#include <assimp/ai_assert.h>
-#include <assimp/importerdesc.h>
-#include <assimp/scene.h>
-#include <assimp/DefaultLogger.hpp>
-#include <assimp/Importer.hpp>
-#include <assimp/commonMetaData.h>
-#include <assimp/DefaultIOSystem.h>
-
-#include <memory>
-#include <unordered_map>
-
-#include <rapidjson/document.h>
-#include <rapidjson/rapidjson.h>
-
-using namespace Assimp;
-using namespace glTF2;
-using namespace glTFCommon;
-
-namespace {
-// generate bi-tangents from normals and tangents according to spec
-struct Tangent {
-    aiVector3D xyz;
-    ai_real w;
-};
-} // namespace
-
-//
-// glTF2Importer
-//
-
-static const aiImporterDesc desc = {
-    "glTF2 Importer",
-    "",
-    "",
-    "",
-    aiImporterFlags_SupportTextFlavour | aiImporterFlags_SupportBinaryFlavour | aiImporterFlags_LimitedSupport | aiImporterFlags_Experimental,
-    0,
-    0,
-    0,
-    0,
-    "gltf glb"
-};
-
-glTF2Importer::glTF2Importer() :
-        BaseImporter(),
-        meshOffsets(),
-        mEmbeddedTexIdxs(),
-        mScene(nullptr) {
-    // empty
-}
-
-glTF2Importer::~glTF2Importer() {
-    // empty
-}
-
-const aiImporterDesc *glTF2Importer::GetInfo() const {
-    return &desc;
-}
-
-bool glTF2Importer::CanRead(const std::string &filename, IOSystem *pIOHandler, bool checkSig ) const {
-    const std::string extension = GetExtension(filename);
-    if (!checkSig && (extension != "gltf") && (extension != "glb")) {
-        return false;
-    }
-
-    if (pIOHandler) {
-        glTF2::Asset asset(pIOHandler);
-        return asset.CanRead(filename, extension == "glb");
-    }
-
-    return false;
-}
-
-static inline aiTextureMapMode ConvertWrappingMode(SamplerWrap gltfWrapMode) {
-    switch (gltfWrapMode) {
-        case SamplerWrap::Mirrored_Repeat:
-            return aiTextureMapMode_Mirror;
-
-        case SamplerWrap::Clamp_To_Edge:
-            return aiTextureMapMode_Clamp;
-
-        case SamplerWrap::UNSET:
-        case SamplerWrap::Repeat:
-        default:
-            return aiTextureMapMode_Wrap;
-    }
-}
-
-static inline void SetMaterialColorProperty(Asset & /*r*/, vec4 &prop, aiMaterial *mat,
-        const char *pKey, unsigned int type, unsigned int idx) {
-    aiColor4D col;
-    CopyValue(prop, col);
-    mat->AddProperty(&col, 1, pKey, type, idx);
-}
-
-static inline void SetMaterialColorProperty(Asset & /*r*/, vec3 &prop, aiMaterial *mat,
-        const char *pKey, unsigned int type, unsigned int idx) {
-    aiColor4D col;
-    glTFCommon::CopyValue(prop, col);
-    mat->AddProperty(&col, 1, pKey, type, idx);
-}
-
-static void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset & /*r*/,
-        glTF2::TextureInfo prop, aiMaterial *mat, aiTextureType texType,
-        unsigned int texSlot = 0) {
-    if (prop.texture && prop.texture->source) {
-        aiString uri(prop.texture->source->uri);
-
-        int texIdx = embeddedTexIdxs[prop.texture->source.GetIndex()];
-        if (texIdx != -1) { // embedded
-            // setup texture reference string (copied from ColladaLoader::FindFilenameForEffectTexture)
-            uri.data[0] = '*';
-            uri.length = 1 + ASSIMP_itoa10(uri.data + 1, MAXLEN - 1, texIdx);
-        }
-
-        mat->AddProperty(&uri, AI_MATKEY_TEXTURE(texType, texSlot));
-        const int uvIndex = static_cast<int>(prop.texCoord);
-        mat->AddProperty(&uvIndex, 1, AI_MATKEY_UVWSRC(texType, texSlot));
-
-        if (prop.textureTransformSupported) {
-            aiUVTransform transform;
-            transform.mScaling.x = prop.TextureTransformExt_t.scale[0];
-            transform.mScaling.y = prop.TextureTransformExt_t.scale[1];
-            transform.mRotation = -prop.TextureTransformExt_t.rotation; // must be negated
-
-            // A change of coordinates is required to map glTF UV transformations into the space used by
-            // Assimp. In glTF all UV origins are at 0,1 (top left of texture) in Assimp space. In Assimp
-            // rotation occurs around the image center (0.5,0.5) where as in glTF rotation is around the
-            // texture origin. All three can be corrected for solely by a change of the translation since
-            // the transformations available are shape preserving. Note the importer already flips the V
-            // coordinate of the actual meshes during import.
-            const ai_real rcos(cos(-transform.mRotation));
-            const ai_real rsin(sin(-transform.mRotation));
-            transform.mTranslation.x = (static_cast<ai_real>( 0.5 ) * transform.mScaling.x) * (-rcos + rsin + 1) + prop.TextureTransformExt_t.offset[0];
-            transform.mTranslation.y = ((static_cast<ai_real>( 0.5 ) * transform.mScaling.y) * (rsin + rcos - 1)) + 1 - transform.mScaling.y - prop.TextureTransformExt_t.offset[1];;
-
-            mat->AddProperty(&transform, 1, _AI_MATKEY_UVTRANSFORM_BASE, texType, texSlot);
-        }
-
-        if (prop.texture->sampler) {
-            Ref<Sampler> sampler = prop.texture->sampler;
-
-            aiString name(sampler->name);
-            aiString id(sampler->id);
-
-            mat->AddProperty(&name, AI_MATKEY_GLTF_MAPPINGNAME(texType, texSlot));
-            mat->AddProperty(&id, AI_MATKEY_GLTF_MAPPINGID(texType, texSlot));
-
-            aiTextureMapMode wrapS = ConvertWrappingMode(sampler->wrapS);
-            aiTextureMapMode wrapT = ConvertWrappingMode(sampler->wrapT);
-            mat->AddProperty(&wrapS, 1, AI_MATKEY_MAPPINGMODE_U(texType, texSlot));
-            mat->AddProperty(&wrapT, 1, AI_MATKEY_MAPPINGMODE_V(texType, texSlot));
-
-            if (sampler->magFilter != SamplerMagFilter::UNSET) {
-                mat->AddProperty(&sampler->magFilter, 1, AI_MATKEY_GLTF_MAPPINGFILTER_MAG(texType, texSlot));
-            }
-
-            if (sampler->minFilter != SamplerMinFilter::UNSET) {
-                mat->AddProperty(&sampler->minFilter, 1, AI_MATKEY_GLTF_MAPPINGFILTER_MIN(texType, texSlot));
-            }
-        } else {
-            // Use glTFv2 default sampler
-            const aiTextureMapMode default_wrap = aiTextureMapMode_Wrap;
-            mat->AddProperty(&default_wrap, 1, AI_MATKEY_MAPPINGMODE_U(texType, texSlot));
-            mat->AddProperty(&default_wrap, 1, AI_MATKEY_MAPPINGMODE_V(texType, texSlot));
-        }
-    }
-}
-
-inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset &r,
-        NormalTextureInfo &prop, aiMaterial *mat, aiTextureType texType,
-        unsigned int texSlot = 0) {
-    SetMaterialTextureProperty(embeddedTexIdxs, r, (glTF2::TextureInfo)prop, mat, texType, texSlot);
-
-    if (prop.texture && prop.texture->source) {
-        mat->AddProperty(&prop.scale, 1, AI_MATKEY_GLTF_TEXTURE_SCALE(texType, texSlot));
-    }
-}
-
-inline void SetMaterialTextureProperty(std::vector<int> &embeddedTexIdxs, Asset &r,
-        OcclusionTextureInfo &prop, aiMaterial *mat, aiTextureType texType,
-        unsigned int texSlot = 0) {
-    SetMaterialTextureProperty(embeddedTexIdxs, r, (glTF2::TextureInfo)prop, mat, texType, texSlot);
-
-    if (prop.texture && prop.texture->source) {
-        mat->AddProperty(&prop.strength, 1, AI_MATKEY_GLTF_TEXTURE_STRENGTH(texType, texSlot));
-    }
-}
-
-static aiMaterial *ImportMaterial(std::vector<int> &embeddedTexIdxs, Asset &r, Material &mat) {
-    aiMaterial *aimat = new aiMaterial();
-
-    try {
-        if (!mat.name.empty()) {
-            aiString str(mat.name);
-
-            aimat->AddProperty(&str, AI_MATKEY_NAME);
-        }
-
-        // Set Assimp DIFFUSE and BASE COLOR to the pbrMetallicRoughness base color and texture for backwards compatibility
-        // Technically should not load any pbrMetallicRoughness if extensionsRequired contains KHR_materials_pbrSpecularGlossiness
-        SetMaterialColorProperty(r, mat.pbrMetallicRoughness.baseColorFactor, aimat, AI_MATKEY_COLOR_DIFFUSE);
-        SetMaterialColorProperty(r, mat.pbrMetallicRoughness.baseColorFactor, aimat, AI_MATKEY_BASE_COLOR);
-
-        SetMaterialTextureProperty(embeddedTexIdxs, r, mat.pbrMetallicRoughness.baseColorTexture, aimat, aiTextureType_DIFFUSE);
-        SetMaterialTextureProperty(embeddedTexIdxs, r, mat.pbrMetallicRoughness.baseColorTexture, aimat, aiTextureType_BASE_COLOR);
-
-        SetMaterialTextureProperty(embeddedTexIdxs, r, mat.pbrMetallicRoughness.metallicRoughnessTexture, aimat, AI_MATKEY_GLTF_PBRMETALLICROUGHNESS_METALLICROUGHNESS_TEXTURE);
-
-        aimat->AddProperty(&mat.pbrMetallicRoughness.metallicFactor, 1, AI_MATKEY_METALLIC_FACTOR);
-        aimat->AddProperty(&mat.pbrMetallicRoughness.roughnessFactor, 1, AI_MATKEY_ROUGHNESS_FACTOR);
-
-        float roughnessAsShininess = 1 - mat.pbrMetallicRoughness.roughnessFactor;
-        roughnessAsShininess *= roughnessAsShininess * 1000;
-        aimat->AddProperty(&roughnessAsShininess, 1, AI_MATKEY_SHININESS);
-
-        SetMaterialTextureProperty(embeddedTexIdxs, r, mat.normalTexture, aimat, aiTextureType_NORMALS);
-        SetMaterialTextureProperty(embeddedTexIdxs, r, mat.occlusionTexture, aimat, aiTextureType_LIGHTMAP);
-        SetMaterialTextureProperty(embeddedTexIdxs, r, mat.emissiveTexture, aimat, aiTextureType_EMISSIVE);
-        SetMaterialColorProperty(r, mat.emissiveFactor, aimat, AI_MATKEY_COLOR_EMISSIVE);
-
-        aimat->AddProperty(&mat.doubleSided, 1, AI_MATKEY_TWOSIDED);
-        aimat->AddProperty(&mat.pbrMetallicRoughness.baseColorFactor[3], 1, AI_MATKEY_OPACITY);
-
-        aiString alphaMode(mat.alphaMode);
-        aimat->AddProperty(&alphaMode, AI_MATKEY_GLTF_ALPHAMODE);
-        aimat->AddProperty(&mat.alphaCutoff, 1, AI_MATKEY_GLTF_ALPHACUTOFF);
-
-        //pbrSpecularGlossiness
-        if (mat.pbrSpecularGlossiness.isPresent) {
-            PbrSpecularGlossiness &pbrSG = mat.pbrSpecularGlossiness.value;
-
-            SetMaterialColorProperty(r, pbrSG.diffuseFactor, aimat, AI_MATKEY_COLOR_DIFFUSE);
-            SetMaterialColorProperty(r, pbrSG.specularFactor, aimat, AI_MATKEY_COLOR_SPECULAR);
-
-            float glossinessAsShininess = pbrSG.glossinessFactor * 1000.0f;
-            aimat->AddProperty(&glossinessAsShininess, 1, AI_MATKEY_SHININESS);
-            aimat->AddProperty(&pbrSG.glossinessFactor, 1, AI_MATKEY_GLOSSINESS_FACTOR);
-
-            SetMaterialTextureProperty(embeddedTexIdxs, r, pbrSG.diffuseTexture, aimat, aiTextureType_DIFFUSE);
-
-            SetMaterialTextureProperty(embeddedTexIdxs, r, pbrSG.specularGlossinessTexture, aimat, aiTextureType_SPECULAR);
-        }
-
-        // glTFv2 is either PBR or Unlit
-        aiShadingMode shadingMode = aiShadingMode_PBR_BRDF;
-        if (mat.unlit) {
-            aimat->AddProperty(&mat.unlit, 1, "$mat.gltf.unlit", 0, 0); // TODO: Remove this property, it is kept for backwards compatibility with assimp 5.0.1
-            shadingMode = aiShadingMode_Unlit;
-        }
-
-        aimat->AddProperty(&shadingMode, 1, AI_MATKEY_SHADING_MODEL);
-
-
-        // KHR_materials_sheen
-        if (mat.materialSheen.isPresent) {
-            MaterialSheen &sheen = mat.materialSheen.value;
-            // Default value {0,0,0} disables Sheen
-            if (std::memcmp(sheen.sheenColorFactor, defaultSheenFactor, sizeof(glTFCommon::vec3)) != 0) {
-                SetMaterialColorProperty(r, sheen.sheenColorFactor, aimat, AI_MATKEY_SHEEN_COLOR_FACTOR);
-                aimat->AddProperty(&sheen.sheenRoughnessFactor, 1, AI_MATKEY_SHEEN_ROUGHNESS_FACTOR);
-                SetMaterialTextureProperty(embeddedTexIdxs, r, sheen.sheenColorTexture, aimat, AI_MATKEY_SHEEN_COLOR_TEXTURE);
-                SetMaterialTextureProperty(embeddedTexIdxs, r, sheen.sheenRoughnessTexture, aimat, AI_MATKEY_SHEEN_ROUGHNESS_TEXTURE);
-            }
-        }
-
-        // KHR_materials_clearcoat
-        if (mat.materialClearcoat.isPresent) {
-            MaterialClearcoat &clearcoat = mat.materialClearcoat.value;
-            // Default value 0.0 disables clearcoat
-            if (clearcoat.clearcoatFactor != 0.0f) {
-                aimat->AddProperty(&clearcoat.clearcoatFactor, 1, AI_MATKEY_CLEARCOAT_FACTOR);
-                aimat->AddProperty(&clearcoat.clearcoatRoughnessFactor, 1, AI_MATKEY_CLEARCOAT_ROUGHNESS_FACTOR);
-                SetMaterialTextureProperty(embeddedTexIdxs, r, clearcoat.clearcoatTexture, aimat, AI_MATKEY_CLEARCOAT_TEXTURE);
-                SetMaterialTextureProperty(embeddedTexIdxs, r, clearcoat.clearcoatRoughnessTexture, aimat, AI_MATKEY_CLEARCOAT_ROUGHNESS_TEXTURE);
-                SetMaterialTextureProperty(embeddedTexIdxs, r, clearcoat.clearcoatNormalTexture, aimat, AI_MATKEY_CLEARCOAT_NORMAL_TEXTURE);
-            }
-        }
-
-        // KHR_materials_transmission
-        if (mat.materialTransmission.isPresent) {
-            MaterialTransmission &transmission = mat.materialTransmission.value;
-
-            aimat->AddProperty(&transmission.transmissionFactor, 1, AI_MATKEY_TRANSMISSION_FACTOR);
-            SetMaterialTextureProperty(embeddedTexIdxs, r, transmission.transmissionTexture, aimat, AI_MATKEY_TRANSMISSION_TEXTURE);
-        }
-
-        // KHR_materials_volume
-        if (mat.materialVolume.isPresent) {
-            MaterialVolume &volume = mat.materialVolume.value;
-
-            aimat->AddProperty(&volume.thicknessFactor, 1, AI_MATKEY_VOLUME_THICKNESS_FACTOR);
-            SetMaterialTextureProperty(embeddedTexIdxs, r, volume.thicknessTexture, aimat, AI_MATKEY_VOLUME_THICKNESS_TEXTURE);
-            aimat->AddProperty(&volume.attenuationDistance, 1, AI_MATKEY_VOLUME_ATTENUATION_DISTANCE);
-            SetMaterialColorProperty(r, volume.attenuationColor, aimat, AI_MATKEY_VOLUME_ATTENUATION_COLOR);
-        }
-
-        // KHR_materials_ior
-        if (mat.materialIOR.isPresent) {
-            MaterialIOR &ior = mat.materialIOR.value;
-
-            aimat->AddProperty(&ior.ior, 1, AI_MATKEY_REFRACTI);
-        }
-
-        return aimat;
-    } catch (...) {
-        delete aimat;
-        throw;
-    }
-}
-
-void glTF2Importer::ImportMaterials(Asset &r) {
-    const unsigned int numImportedMaterials = unsigned(r.materials.Size());
-    ASSIMP_LOG_DEBUG("Importing ", numImportedMaterials, " materials");
-    Material defaultMaterial;
-
-    mScene->mNumMaterials = numImportedMaterials + 1;
-    mScene->mMaterials = new aiMaterial *[mScene->mNumMaterials];
-    std::fill(mScene->mMaterials, mScene->mMaterials + mScene->mNumMaterials, nullptr);
-    mScene->mMaterials[numImportedMaterials] = ImportMaterial(mEmbeddedTexIdxs, r, defaultMaterial);
-
-    for (unsigned int i = 0; i < numImportedMaterials; ++i) {
-        mScene->mMaterials[i] = ImportMaterial(mEmbeddedTexIdxs, r, r.materials[i]);
-    }
-}
-
-static inline void SetFaceAndAdvance1(aiFace*& face, unsigned int numVertices, unsigned int a) {
-    if (a >= numVertices) {
-        return;
-    }
-    face->mNumIndices = 1;
-    face->mIndices = new unsigned int[1];
-    face->mIndices[0] = a;
-    ++face;
-}
-
-static inline void SetFaceAndAdvance2(aiFace*& face, unsigned int numVertices,
-        unsigned int a, unsigned int b) {
-    if ((a >= numVertices) || (b >= numVertices)) {
-        return;
-    }
-    face->mNumIndices = 2;
-    face->mIndices = new unsigned int[2];
-    face->mIndices[0] = a;
-    face->mIndices[1] = b;
-    ++face;
-}
-
-static inline void SetFaceAndAdvance3(aiFace*& face, unsigned int numVertices, unsigned int a,
-        unsigned int b, unsigned int c) {
-    if ((a >= numVertices) || (b >= numVertices) || (c >= numVertices)) {
-        return;
-    }
-    face->mNumIndices = 3;
-    face->mIndices = new unsigned int[3];
-    face->mIndices[0] = a;
-    face->mIndices[1] = b;
-    face->mIndices[2] = c;
-    ++face;
-}
-
-#ifdef ASSIMP_BUILD_DEBUG
-static inline bool CheckValidFacesIndices(aiFace *faces, unsigned nFaces, unsigned nVerts) {
-    for (unsigned i = 0; i < nFaces; ++i) {
-        for (unsigned j = 0; j < faces[i].mNumIndices; ++j) {
-            unsigned idx = faces[i].mIndices[j];
-            if (idx >= nVerts) {
-                return false;
-            }
-        }
-    }
-    return true;
-}
-#endif // ASSIMP_BUILD_DEBUG
-
-template<typename T>
-aiColor4D* GetVertexColorsForType(Ref<Accessor> input) {
-    constexpr float max = std::numeric_limits<T>::max();
-    aiColor4t<T>* colors;
-    input->ExtractData(colors);
-    auto output = new aiColor4D[input->count];
-    for (size_t i = 0; i < input->count; i++) {
-        output[i] = aiColor4D(
-            colors[i].r / max, colors[i].g / max,
-            colors[i].b / max, colors[i].a / max
-        );
-    }
-    delete[] colors;
-    return output;
-}
-
-void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
-    ASSIMP_LOG_DEBUG("Importing ", r.meshes.Size(), " meshes");
-    std::vector<std::unique_ptr<aiMesh>> meshes;
-
-    unsigned int k = 0;
-    meshOffsets.clear();
-
-    for (unsigned int m = 0; m < r.meshes.Size(); ++m) {
-        Mesh &mesh = r.meshes[m];
-
-        meshOffsets.push_back(k);
-        k += unsigned(mesh.primitives.size());
-
-        for (unsigned int p = 0; p < mesh.primitives.size(); ++p) {
-            Mesh::Primitive &prim = mesh.primitives[p];
-
-            aiMesh *aim = new aiMesh();
-            meshes.push_back(std::unique_ptr<aiMesh>(aim));
-
-            aim->mName = mesh.name.empty() ? mesh.id : mesh.name;
-
-            if (mesh.primitives.size() > 1) {
-                ai_uint32 &len = aim->mName.length;
-                aim->mName.data[len] = '-';
-                len += 1 + ASSIMP_itoa10(aim->mName.data + len + 1, unsigned(MAXLEN - len - 1), p);
-            }
-
-            switch (prim.mode) {
-                case PrimitiveMode_POINTS:
-                    aim->mPrimitiveTypes |= aiPrimitiveType_POINT;
-                    break;
-
-                case PrimitiveMode_LINES:
-                case PrimitiveMode_LINE_LOOP:
-                case PrimitiveMode_LINE_STRIP:
-                    aim->mPrimitiveTypes |= aiPrimitiveType_LINE;
-                    break;
-
-                case PrimitiveMode_TRIANGLES:
-                case PrimitiveMode_TRIANGLE_STRIP:
-                case PrimitiveMode_TRIANGLE_FAN:
-                    aim->mPrimitiveTypes |= aiPrimitiveType_TRIANGLE;
-                    break;
-            }
-
-            Mesh::Primitive::Attributes &attr = prim.attributes;
-
-            if (!attr.position.empty() && attr.position[0]) {
-                aim->mNumVertices = static_cast<unsigned int>(attr.position[0]->count);
-                attr.position[0]->ExtractData(aim->mVertices);
-            }
-
-            if (!attr.normal.empty() && attr.normal[0]) {
-                if (attr.normal[0]->count != aim->mNumVertices) {
-                    DefaultLogger::get()->warn("Normal count in mesh \"", mesh.name, "\" does not match the vertex count, normals ignored.");
-                } else {
-                    attr.normal[0]->ExtractData(aim->mNormals);
-
-                    // only extract tangents if normals are present
-                    if (!attr.tangent.empty() && attr.tangent[0]) {
-                        if (attr.tangent[0]->count != aim->mNumVertices) {
-                            DefaultLogger::get()->warn("Tangent count in mesh \"", mesh.name, "\" does not match the vertex count, tangents ignored.");
-                        } else {
-                            // generate bitangents from normals and tangents according to spec
-                            Tangent *tangents = nullptr;
-
-                            attr.tangent[0]->ExtractData(tangents);
-
-                            aim->mTangents = new aiVector3D[aim->mNumVertices];
-                            aim->mBitangents = new aiVector3D[aim->mNumVertices];
-
-                            for (unsigned int i = 0; i < aim->mNumVertices; ++i) {
-                                aim->mTangents[i] = tangents[i].xyz;
-                                aim->mBitangents[i] = (aim->mNormals[i] ^ tangents[i].xyz) * tangents[i].w;
-                            }
-
-                            delete[] tangents;
-                        }
-                    }
-                }
-            }
-
-            for (size_t c = 0; c < attr.color.size() && c < AI_MAX_NUMBER_OF_COLOR_SETS; ++c) {
-                if (attr.color[c]->count != aim->mNumVertices) {
-                    DefaultLogger::get()->warn("Color stream size in mesh \"", mesh.name,
-                                               "\" does not match the vertex count");
-                    continue;
-                }
-
-                auto componentType = attr.color[c]->componentType;
-                if (componentType == glTF2::ComponentType_FLOAT) {
-                    attr.color[c]->ExtractData(aim->mColors[c]);
-                } else {
-                    if (componentType == glTF2::ComponentType_UNSIGNED_BYTE) {
-                        aim->mColors[c] = GetVertexColorsForType<unsigned char>(attr.color[c]);
-                    } else if (componentType == glTF2::ComponentType_UNSIGNED_SHORT) {
-                        aim->mColors[c] = GetVertexColorsForType<unsigned short>(attr.color[c]);
-                    }
-                }
-            }
-            for (size_t tc = 0; tc < attr.texcoord.size() && tc < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++tc) {
-                if (!attr.texcoord[tc]) {
-                    DefaultLogger::get()->warn("Texture coordinate accessor not found or non-contiguous texture coordinate sets.");
-                    continue;
-                }
-
-                if (attr.texcoord[tc]->count != aim->mNumVertices) {
-                    DefaultLogger::get()->warn("Texcoord stream size in mesh \"", mesh.name,
-                                               "\" does not match the vertex count");
-                    continue;
-                }
-
-                attr.texcoord[tc]->ExtractData(aim->mTextureCoords[tc]);
-                aim->mNumUVComponents[tc] = attr.texcoord[tc]->GetNumComponents();
-
-                aiVector3D *values = aim->mTextureCoords[tc];
-                for (unsigned int i = 0; i < aim->mNumVertices; ++i) {
-                    values[i].y = 1 - values[i].y; // Flip Y coords
-                }
-            }
-
-            std::vector<Mesh::Primitive::Target> &targets = prim.targets;
-            if (!targets.empty()) {
-                aim->mNumAnimMeshes = (unsigned int)targets.size();
-                aim->mAnimMeshes = new aiAnimMesh *[aim->mNumAnimMeshes];
-                std::fill(aim->mAnimMeshes, aim->mAnimMeshes + aim->mNumAnimMeshes, nullptr);
-                for (size_t i = 0; i < targets.size(); i++) {
-                    bool needPositions = targets[i].position.size() > 0;
-                    bool needNormals = (targets[i].normal.size() > 0) && aim->HasNormals();
-                    bool needTangents = (targets[i].tangent.size() > 0) && aim->HasTangentsAndBitangents();
-                    // GLTF morph does not support colors and texCoords
-                    aim->mAnimMeshes[i] = aiCreateAnimMesh(aim,
-                            needPositions, needNormals, needTangents, false, false);
-                    aiAnimMesh &aiAnimMesh = *(aim->mAnimMeshes[i]);
-                    Mesh::Primitive::Target &target = targets[i];
-
-                    if (needPositions) {
-                        if (target.position[0]->count != aim->mNumVertices) {
-                            ASSIMP_LOG_WARN("Positions of target ", i, " in mesh \"", mesh.name, "\" does not match the vertex count");
-                        } else {
-                            aiVector3D *positionDiff = nullptr;
-                            target.position[0]->ExtractData(positionDiff);
-                            for (unsigned int vertexId = 0; vertexId < aim->mNumVertices; vertexId++) {
-                                aiAnimMesh.mVertices[vertexId] += positionDiff[vertexId];
-                            }
-                            delete[] positionDiff;
-                        }
-                    }
-                    if (needNormals) {
-                        if (target.normal[0]->count != aim->mNumVertices) {
-                            ASSIMP_LOG_WARN("Normals of target ", i, " in mesh \"", mesh.name, "\" does not match the vertex count");
-                        } else {
-                            aiVector3D *normalDiff = nullptr;
-                            target.normal[0]->ExtractData(normalDiff);
-                            for (unsigned int vertexId = 0; vertexId < aim->mNumVertices; vertexId++) {
-                                aiAnimMesh.mNormals[vertexId] += normalDiff[vertexId];
-                            }
-                            delete[] normalDiff;
-                        }
-                    }
-                    if (needTangents) {
-                        if (target.tangent[0]->count != aim->mNumVertices) {
-                            ASSIMP_LOG_WARN("Tangents of target ", i, " in mesh \"", mesh.name, "\" does not match the vertex count");
-                        } else {
-                            Tangent *tangent = nullptr;
-                            attr.tangent[0]->ExtractData(tangent);
-
-                            aiVector3D *tangentDiff = nullptr;
-                            target.tangent[0]->ExtractData(tangentDiff);
-
-                            for (unsigned int vertexId = 0; vertexId < aim->mNumVertices; ++vertexId) {
-                                tangent[vertexId].xyz += tangentDiff[vertexId];
-                                aiAnimMesh.mTangents[vertexId] = tangent[vertexId].xyz;
-                                aiAnimMesh.mBitangents[vertexId] = (aiAnimMesh.mNormals[vertexId] ^ tangent[vertexId].xyz) * tangent[vertexId].w;
-                            }
-                            delete[] tangent;
-                            delete[] tangentDiff;
-                        }
-                    }
-                    if (mesh.weights.size() > i) {
-                        aiAnimMesh.mWeight = mesh.weights[i];
-                    }
-                    if (mesh.targetNames.size() > i) {
-                        aiAnimMesh.mName = mesh.targetNames[i];
-                    }
-                }
-            }
-
-            aiFace *faces = nullptr;
-            aiFace *facePtr = nullptr;
-            size_t nFaces = 0;
-
-            if (prim.indices) {
-                size_t count = prim.indices->count;
-
-                Accessor::Indexer data = prim.indices->GetIndexer();
-                if (!data.IsValid()) {
-                    throw DeadlyImportError("GLTF: Invalid accessor without data in mesh ", getContextForErrorMessages(mesh.id, mesh.name));
-                }
-
-                switch (prim.mode) {
-                    case PrimitiveMode_POINTS: {
-                        nFaces = count;
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < count; ++i) {
-                            SetFaceAndAdvance1(facePtr, aim->mNumVertices, data.GetUInt(i));
-                        }
-                        break;
-                    }
-
-                    case PrimitiveMode_LINES: {
-                        nFaces = count / 2;
-                        if (nFaces * 2 != count) {
-                            ASSIMP_LOG_WARN("The number of vertices was not compatible with the LINES mode. Some vertices were dropped.");
-                            count = nFaces * 2;
-                        }
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < count; i += 2) {
-                            SetFaceAndAdvance2(facePtr, aim->mNumVertices, data.GetUInt(i), data.GetUInt(i + 1));
-                        }
-                        break;
-                    }
-
-                    case PrimitiveMode_LINE_LOOP:
-                    case PrimitiveMode_LINE_STRIP: {
-                        nFaces = count - ((prim.mode == PrimitiveMode_LINE_STRIP) ? 1 : 0);
-                        facePtr = faces = new aiFace[nFaces];
-                        SetFaceAndAdvance2(facePtr, aim->mNumVertices, data.GetUInt(0), data.GetUInt(1));
-                        for (unsigned int i = 2; i < count; ++i) {
-                            SetFaceAndAdvance2(facePtr, aim->mNumVertices, data.GetUInt(i - 1), data.GetUInt(i));
-                        }
-                        if (prim.mode == PrimitiveMode_LINE_LOOP) { // close the loop
-                            SetFaceAndAdvance2(facePtr, aim->mNumVertices, data.GetUInt(static_cast<int>(count) - 1), faces[0].mIndices[0]);
-                        }
-                        break;
-                    }
-
-                    case PrimitiveMode_TRIANGLES: {
-                        nFaces = count / 3;
-                        if (nFaces * 3 != count) {
-                            ASSIMP_LOG_WARN("The number of vertices was not compatible with the TRIANGLES mode. Some vertices were dropped.");
-                            count = nFaces * 3;
-                        }
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < count; i += 3) {
-                            SetFaceAndAdvance3(facePtr, aim->mNumVertices, data.GetUInt(i), data.GetUInt(i + 1), data.GetUInt(i + 2));
-                        }
-                        break;
-                    }
-                    case PrimitiveMode_TRIANGLE_STRIP: {
-                        nFaces = count - 2;
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < nFaces; ++i) {
-                            //The ordering is to ensure that the triangles are all drawn with the same orientation
-                            if ((i + 1) % 2 == 0) {
-                                //For even n, vertices n + 1, n, and n + 2 define triangle n
-                                SetFaceAndAdvance3(facePtr, aim->mNumVertices, data.GetUInt(i + 1), data.GetUInt(i), data.GetUInt(i + 2));
-                            } else {
-                                //For odd n, vertices n, n+1, and n+2 define triangle n
-                                SetFaceAndAdvance3(facePtr, aim->mNumVertices, data.GetUInt(i), data.GetUInt(i + 1), data.GetUInt(i + 2));
-                            }
-                        }
-                        break;
-                    }
-                    case PrimitiveMode_TRIANGLE_FAN:
-                        nFaces = count - 2;
-                        facePtr = faces = new aiFace[nFaces];
-                        SetFaceAndAdvance3(facePtr, aim->mNumVertices, data.GetUInt(0), data.GetUInt(1), data.GetUInt(2));
-                        for (unsigned int i = 1; i < nFaces; ++i) {
-                            SetFaceAndAdvance3(facePtr, aim->mNumVertices, data.GetUInt(0), data.GetUInt(i + 1), data.GetUInt(i + 2));
-                        }
-                        break;
-                }
-            } else { // no indices provided so directly generate from counts
-
-                // use the already determined count as it includes checks
-                unsigned int count = aim->mNumVertices;
-
-                switch (prim.mode) {
-                    case PrimitiveMode_POINTS: {
-                        nFaces = count;
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < count; ++i) {
-                            SetFaceAndAdvance1(facePtr, aim->mNumVertices, i);
-                        }
-                        break;
-                    }
-
-                    case PrimitiveMode_LINES: {
-                        nFaces = count / 2;
-                        if (nFaces * 2 != count) {
-                            ASSIMP_LOG_WARN("The number of vertices was not compatible with the LINES mode. Some vertices were dropped.");
-                            count = (unsigned int)nFaces * 2;
-                        }
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < count; i += 2) {
-                            SetFaceAndAdvance2(facePtr, aim->mNumVertices, i, i + 1);
-                        }
-                        break;
-                    }
-
-                    case PrimitiveMode_LINE_LOOP:
-                    case PrimitiveMode_LINE_STRIP: {
-                        nFaces = count - ((prim.mode == PrimitiveMode_LINE_STRIP) ? 1 : 0);
-                        facePtr = faces = new aiFace[nFaces];
-                        SetFaceAndAdvance2(facePtr, aim->mNumVertices, 0, 1);
-                        for (unsigned int i = 2; i < count; ++i) {
-                            SetFaceAndAdvance2(facePtr, aim->mNumVertices, i - 1, i);
-                        }
-                        if (prim.mode == PrimitiveMode_LINE_LOOP) { // close the loop
-                            SetFaceAndAdvance2(facePtr, aim->mNumVertices, count - 1, 0);
-                        }
-                        break;
-                    }
-
-                    case PrimitiveMode_TRIANGLES: {
-                        nFaces = count / 3;
-                        if (nFaces * 3 != count) {
-                            ASSIMP_LOG_WARN("The number of vertices was not compatible with the TRIANGLES mode. Some vertices were dropped.");
-                            count = (unsigned int)nFaces * 3;
-                        }
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < count; i += 3) {
-                            SetFaceAndAdvance3(facePtr, aim->mNumVertices, i, i + 1, i + 2);
-                        }
-                        break;
-                    }
-                    case PrimitiveMode_TRIANGLE_STRIP: {
-                        nFaces = count - 2;
-                        facePtr = faces = new aiFace[nFaces];
-                        for (unsigned int i = 0; i < nFaces; ++i) {
-                            //The ordering is to ensure that the triangles are all drawn with the same orientation
-                            if ((i + 1) % 2 == 0) {
-                                //For even n, vertices n + 1, n, and n + 2 define triangle n
-                                SetFaceAndAdvance3(facePtr, aim->mNumVertices, i + 1, i, i + 2);
-                            } else {
-                                //For odd n, vertices n, n+1, and n+2 define triangle n
-                                SetFaceAndAdvance3(facePtr, aim->mNumVertices, i, i + 1, i + 2);
-                            }
-                        }
-                        break;
-                    }
-                    case PrimitiveMode_TRIANGLE_FAN:
-                        nFaces = count - 2;
-                        facePtr = faces = new aiFace[nFaces];
-                        SetFaceAndAdvance3(facePtr, aim->mNumVertices, 0, 1, 2);
-                        for (unsigned int i = 1; i < nFaces; ++i) {
-                            SetFaceAndAdvance3(facePtr, aim->mNumVertices, 0, i + 1, i + 2);
-                        }
-                        break;
-                }
-            }
-
-            if (faces) {
-                aim->mFaces = faces;
-                const unsigned int actualNumFaces = static_cast<unsigned int>(facePtr - faces);
-                if (actualNumFaces < nFaces) {
-                    ASSIMP_LOG_WARN("Some faces had out-of-range indices. Those faces were dropped.");
-                }
-                if (actualNumFaces == 0) {
-                    throw DeadlyImportError("Mesh \"", aim->mName.C_Str(), "\" has no faces");
-                }
-                aim->mNumFaces = actualNumFaces;
-                ai_assert(CheckValidFacesIndices(faces, actualNumFaces, aim->mNumVertices));
-            }
-
-            if (prim.material) {
-                aim->mMaterialIndex = prim.material.GetIndex();
-            } else {
-                aim->mMaterialIndex = mScene->mNumMaterials - 1;
-            }
-        }
-    }
-
-    meshOffsets.push_back(k);
-
-    CopyVector(meshes, mScene->mMeshes, mScene->mNumMeshes);
-}
-
-void glTF2Importer::ImportCameras(glTF2::Asset &r) {
-    if (!r.cameras.Size()) {
-        return;
-    }
-
-    const unsigned int numCameras = r.cameras.Size();
-    ASSIMP_LOG_DEBUG("Importing ", numCameras, " cameras");
-    mScene->mNumCameras = numCameras;
-    mScene->mCameras = new aiCamera *[numCameras];
-    std::fill(mScene->mCameras, mScene->mCameras + numCameras, nullptr);
-
-    for (size_t i = 0; i < numCameras; ++i) {
-        Camera &cam = r.cameras[i];
-
-        aiCamera *aicam = mScene->mCameras[i] = new aiCamera();
-
-        // cameras point in -Z by default, rest is specified in node transform
-        aicam->mLookAt = aiVector3D(0.f, 0.f, -1.f);
-
-        if (cam.type == Camera::Perspective) {
-            aicam->mAspect = cam.cameraProperties.perspective.aspectRatio;
-            aicam->mHorizontalFOV = cam.cameraProperties.perspective.yfov * ((aicam->mAspect == 0.f) ? 1.f : aicam->mAspect);
-            aicam->mClipPlaneFar = cam.cameraProperties.perspective.zfar;
-            aicam->mClipPlaneNear = cam.cameraProperties.perspective.znear;
-        } else {
-            aicam->mClipPlaneFar = cam.cameraProperties.ortographic.zfar;
-            aicam->mClipPlaneNear = cam.cameraProperties.ortographic.znear;
-            aicam->mHorizontalFOV = 0.0;
-            aicam->mOrthographicWidth = cam.cameraProperties.ortographic.xmag;
-            aicam->mAspect = 1.0f;
-            if (0.f != cam.cameraProperties.ortographic.ymag) {
-                aicam->mAspect = cam.cameraProperties.ortographic.xmag / cam.cameraProperties.ortographic.ymag;
-            }
-        }
-    }
-}
-
-void glTF2Importer::ImportLights(glTF2::Asset &r) {
-    if (!r.lights.Size()) {
-        return;
-    }
-
-    const unsigned int numLights = r.lights.Size();
-    ASSIMP_LOG_DEBUG("Importing ", numLights, " lights");
-    mScene->mNumLights = numLights;
-    mScene->mLights = new aiLight *[numLights];
-    std::fill(mScene->mLights, mScene->mLights + numLights, nullptr);
-
-    for (size_t i = 0; i < numLights; ++i) {
-        Light &light = r.lights[i];
-
-        aiLight *ail = mScene->mLights[i] = new aiLight();
-
-        switch (light.type) {
-            case Light::Directional:
-                ail->mType = aiLightSource_DIRECTIONAL;
-                break;
-            case Light::Point:
-                ail->mType = aiLightSource_POINT;
-                break;
-            case Light::Spot:
-                ail->mType = aiLightSource_SPOT;
-                break;
-        }
-
-        if (ail->mType != aiLightSource_POINT) {
-            ail->mDirection = aiVector3D(0.0f, 0.0f, -1.0f);
-            ail->mUp = aiVector3D(0.0f, 1.0f, 0.0f);
-        }
-
-        vec3 colorWithIntensity = { light.color[0] * light.intensity, light.color[1] * light.intensity, light.color[2] * light.intensity };
-        CopyValue(colorWithIntensity, ail->mColorAmbient);
-        CopyValue(colorWithIntensity, ail->mColorDiffuse);
-        CopyValue(colorWithIntensity, ail->mColorSpecular);
-
-        if (ail->mType == aiLightSource_DIRECTIONAL) {
-            ail->mAttenuationConstant = 1.0;
-            ail->mAttenuationLinear = 0.0;
-            ail->mAttenuationQuadratic = 0.0;
-        } else {
-            //in PBR attenuation is calculated using inverse square law which can be expressed
-            //using assimps equation: 1/(att0 + att1 * d + att2 * d*d) with the following parameters
-            //this is correct equation for the case when range (see
-            //https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual)
-            //is not present. When range is not present it is assumed that it is infinite and so numerator is 1.
-            //When range is present then numerator might be any value in range [0,1] and then assimps equation
-            //will not suffice. In this case range is added into metadata in ImportNode function
-            //and its up to implementation to read it when it wants to
-            ail->mAttenuationConstant = 0.0;
-            ail->mAttenuationLinear = 0.0;
-            ail->mAttenuationQuadratic = 1.0;
-        }
-
-        if (ail->mType == aiLightSource_SPOT) {
-            ail->mAngleInnerCone = light.innerConeAngle;
-            ail->mAngleOuterCone = light.outerConeAngle;
-        }
-    }
-}
-
-static void GetNodeTransform(aiMatrix4x4 &matrix, const glTF2::Node &node) {
-    if (node.matrix.isPresent) {
-        CopyValue(node.matrix.value, matrix);
-        return;
-    } 
-
-    if (node.translation.isPresent) {
-        aiVector3D trans;
-        CopyValue(node.translation.value, trans);
-        aiMatrix4x4 t;
-        aiMatrix4x4::Translation(trans, t);
-        matrix = matrix * t;
-    }
-
-    if (node.rotation.isPresent) {
-        aiQuaternion rot;
-        CopyValue(node.rotation.value, rot);
-        matrix = matrix * aiMatrix4x4(rot.GetMatrix());
-    }
-
-    if (node.scale.isPresent) {
-        aiVector3D scal(1.f);
-        CopyValue(node.scale.value, scal);
-        aiMatrix4x4 s;
-        aiMatrix4x4::Scaling(scal, s);
-        matrix = matrix * s;
-    }
-}
-
-static void BuildVertexWeightMapping(Mesh::Primitive &primitive, std::vector<std::vector<aiVertexWeight>> &map) {
-    Mesh::Primitive::Attributes &attr = primitive.attributes;
-    if (attr.weight.empty() || attr.joint.empty()) {
-        return;
-    }
-    if (attr.weight[0]->count != attr.joint[0]->count) {
-        return;
-    }
-
-    size_t num_vertices = attr.weight[0]->count;
-
-    struct Weights {
-        float values[4];
-    };
-    Weights *weights = nullptr;
-    attr.weight[0]->ExtractData(weights);
-
-    struct Indices8 {
-        uint8_t values[4];
-    };
-    struct Indices16 {
-        uint16_t values[4];
-    };
-    Indices8 *indices8 = nullptr;
-    Indices16 *indices16 = nullptr;
-    if (attr.joint[0]->GetElementSize() == 4) {
-        attr.joint[0]->ExtractData(indices8);
-    } else {
-        attr.joint[0]->ExtractData(indices16);
-    }
-    //
-    if (nullptr == indices8 && nullptr == indices16) {
-        // Something went completely wrong!
-        ai_assert(false);
-        return;
-    }
-
-    for (size_t i = 0; i < num_vertices; ++i) {
-        for (int j = 0; j < 4; ++j) {
-            const unsigned int bone = (indices8 != nullptr) ? indices8[i].values[j] : indices16[i].values[j];
-            const float weight = weights[i].values[j];
-            if (weight > 0 && bone < map.size()) {
-                map[bone].reserve(8);
-                map[bone].emplace_back(static_cast<unsigned int>(i), weight);
-            }
-        }
-    }
-
-    delete[] weights;
-    delete[] indices8;
-    delete[] indices16;
-}
-
-static std::string GetNodeName(const Node &node) {
-    return node.name.empty() ? node.id : node.name;
-}
-
-void ParseExtensions(aiMetadata *metadata, const CustomExtension &extension) {
-    if (extension.mStringValue.isPresent) {
-        metadata->Add(extension.name, aiString(extension.mStringValue.value));
-    } else if (extension.mDoubleValue.isPresent) {
-        metadata->Add(extension.name, extension.mDoubleValue.value);
-    } else if (extension.mUint64Value.isPresent) {
-        metadata->Add(extension.name, extension.mUint64Value.value);
-    } else if (extension.mInt64Value.isPresent) {
-        metadata->Add(extension.name, static_cast<int32_t>(extension.mInt64Value.value));
-    } else if (extension.mBoolValue.isPresent) {
-        metadata->Add(extension.name, extension.mBoolValue.value);
-    } else if (extension.mValues.isPresent) {
-        aiMetadata val;
-        for (auto const & subExtension : extension.mValues.value) {
-            ParseExtensions(&val, subExtension);
-        }
-        metadata->Add(extension.name, val);
-    }
-}
-
-void ParseExtras(aiMetadata *metadata, const CustomExtension &extension) {
-    if (extension.mValues.isPresent) {
-        for (auto const & subExtension : extension.mValues.value) {
-            ParseExtensions(metadata, subExtension);
-        }
-    }
-}
-
-aiNode *ImportNode(aiScene *pScene, glTF2::Asset &r, std::vector<unsigned int> &meshOffsets, glTF2::Ref<glTF2::Node> &ptr) {
-    Node &node = *ptr;
-
-    aiNode *ainode = new aiNode(GetNodeName(node));
-
-    try {
-        if (!node.children.empty()) {
-            ainode->mNumChildren = unsigned(node.children.size());
-            ainode->mChildren = new aiNode *[ainode->mNumChildren];
-            std::fill(ainode->mChildren, ainode->mChildren + ainode->mNumChildren, nullptr);
-
-            for (unsigned int i = 0; i < ainode->mNumChildren; ++i) {
-                aiNode *child = ImportNode(pScene, r, meshOffsets, node.children[i]);
-                child->mParent = ainode;
-                ainode->mChildren[i] = child;
-            }
-        }
-
-        if (node.customExtensions || node.extras) {
-            ainode->mMetaData = new aiMetadata;
-            if (node.customExtensions) {
-                ParseExtensions(ainode->mMetaData, node.customExtensions);
-            }
-            if (node.extras) {
-                ParseExtras(ainode->mMetaData, node.extras);
-            }
-        }
-
-        GetNodeTransform(ainode->mTransformation, node);
-
-        if (!node.meshes.empty()) {
-            // GLTF files contain at most 1 mesh per node.
-            if (node.meshes.size() > 1)
-            {
-                throw DeadlyImportError("GLTF: Invalid input, found ", node.meshes.size(),
-                    " meshes in ", getContextForErrorMessages(node.id, node.name),
-                    ", but only 1 mesh per node allowed.");
-            }
-            int mesh_idx = node.meshes[0].GetIndex();
-            int count = meshOffsets[mesh_idx + 1] - meshOffsets[mesh_idx];
-
-            ainode->mNumMeshes = count;
-            ainode->mMeshes = new unsigned int[count];
-
-            if (node.skin) {
-                for (int primitiveNo = 0; primitiveNo < count; ++primitiveNo) {
-                    aiMesh *mesh = pScene->mMeshes[meshOffsets[mesh_idx] + primitiveNo];
-                    unsigned int numBones =static_cast<unsigned int>(node.skin->jointNames.size());
-
-                    std::vector<std::vector<aiVertexWeight>> weighting(numBones);
-                    BuildVertexWeightMapping(node.meshes[0]->primitives[primitiveNo], weighting);
-
-                    mesh->mNumBones = static_cast<unsigned int>(numBones);
-                    mesh->mBones = new aiBone *[mesh->mNumBones];
-                    std::fill(mesh->mBones, mesh->mBones + mesh->mNumBones, nullptr);
-
-                    // GLTF and Assimp choose to store bone weights differently.
-                    // GLTF has each vertex specify which bones influence the vertex.
-                    // Assimp has each bone specify which vertices it has influence over.
-                    // To convert this data, we first read over the vertex data and pull
-                    // out the bone-to-vertex mapping.  Then, when creating the aiBones,
-                    // we copy the bone-to-vertex mapping into the bone.  This is unfortunate
-                    // both because it's somewhat slow and because, for many applications,
-                    // we then need to reconvert the data back into the vertex-to-bone
-                    // mapping which makes things doubly-slow.
-
-                    mat4 *pbindMatrices = nullptr;
-                    node.skin->inverseBindMatrices->ExtractData(pbindMatrices);
-
-                    for (uint32_t i = 0; i < numBones; ++i) {
-                        const std::vector<aiVertexWeight> &weights = weighting[i];
-                        aiBone *bone = new aiBone();
-
-                        Ref<Node> joint = node.skin->jointNames[i];
-                        if (!joint->name.empty()) {
-                            bone->mName = joint->name;
-                        } else {
-                            // Assimp expects each bone to have a unique name.
-                            static const std::string kDefaultName = "bone_";
-                            char postfix[10] = { 0 };
-                            ASSIMP_itoa10(postfix, i);
-                            bone->mName = (kDefaultName + postfix);
-                        }
-                        GetNodeTransform(bone->mOffsetMatrix, *joint);
-                        CopyValue(pbindMatrices[i], bone->mOffsetMatrix);
-                        bone->mNumWeights = static_cast<uint32_t>(weights.size());
-
-                        if (bone->mNumWeights > 0) {
-                            bone->mWeights = new aiVertexWeight[bone->mNumWeights];
-                            memcpy(bone->mWeights, weights.data(), bone->mNumWeights * sizeof(aiVertexWeight));
-                        } else {
-                            // Assimp expects all bones to have at least 1 weight.
-                            bone->mWeights = new aiVertexWeight[1];
-                            bone->mNumWeights = 1;
-                            bone->mWeights->mVertexId = 0;
-                            bone->mWeights->mWeight = 0.f;
-                        }
-                        mesh->mBones[i] = bone;
-                    }
-
-                    if (pbindMatrices) {
-                        delete[] pbindMatrices;
-                    }
-                }
-            }
-
-            int k = 0;
-            for (unsigned int j = meshOffsets[mesh_idx]; j < meshOffsets[mesh_idx + 1]; ++j, ++k) {
-                ainode->mMeshes[k] = j;
-            }
-        }
-
-        if (node.camera) {
-            pScene->mCameras[node.camera.GetIndex()]->mName = ainode->mName;
-            if (node.translation.isPresent) {
-                aiVector3D trans;
-                CopyValue(node.translation.value, trans);
-                pScene->mCameras[node.camera.GetIndex()]->mPosition = trans;
-            }
-        }
-
-        if (node.light) {
-            pScene->mLights[node.light.GetIndex()]->mName = ainode->mName;
-
-            //range is optional - see https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
-            //it is added to meta data of parent node, because there is no other place to put it
-            if (node.light->range.isPresent) {
-                if (!ainode->mMetaData) {
-                    ainode->mMetaData = aiMetadata::Alloc(1);
-                    ainode->mMetaData->Set(0, "PBR_LightRange", node.light->range.value);
-                } else {
-                    ainode->mMetaData->Add("PBR_LightRange", node.light->range.value);
-                }
-            }
-        }
-
-        return ainode;
-    } catch (...) {
-        delete ainode;
-        throw;
-    }
-}
-
-void glTF2Importer::ImportNodes(glTF2::Asset &r) {
-    if (!r.scene) {
-        throw DeadlyImportError("GLTF: No scene");
-    }
-    ASSIMP_LOG_DEBUG("Importing nodes");
-
-    std::vector<Ref<Node>> rootNodes = r.scene->nodes;
-
-    // The root nodes
-    unsigned int numRootNodes = unsigned(rootNodes.size());
-    if (numRootNodes == 1) { // a single root node: use it
-        mScene->mRootNode = ImportNode(mScene, r, meshOffsets, rootNodes[0]);
-    } else if (numRootNodes > 1) { // more than one root node: create a fake root
-        aiNode *root = mScene->mRootNode = new aiNode("ROOT");
-
-        root->mChildren = new aiNode *[numRootNodes];
-        std::fill(root->mChildren, root->mChildren + numRootNodes, nullptr);
-
-        for (unsigned int i = 0; i < numRootNodes; ++i) {
-            aiNode *node = ImportNode(mScene, r, meshOffsets, rootNodes[i]);
-            node->mParent = root;
-            root->mChildren[root->mNumChildren++] = node;
-        }
-    } else {
-        mScene->mRootNode = new aiNode("ROOT");
-    }
-}
-
-struct AnimationSamplers {
-    AnimationSamplers() :
-            translation(nullptr),
-            rotation(nullptr),
-            scale(nullptr),
-            weight(nullptr) {
-        // empty
-    }
-
-    Animation::Sampler *translation;
-    Animation::Sampler *rotation;
-    Animation::Sampler *scale;
-    Animation::Sampler *weight;
-};
-
-aiNodeAnim *CreateNodeAnim(glTF2::Asset&, Node &node, AnimationSamplers &samplers) {
-    aiNodeAnim *anim = new aiNodeAnim();
-
-    try {
-        anim->mNodeName = GetNodeName(node);
-
-        static const float kMillisecondsFromSeconds = 1000.f;
-
-        if (samplers.translation && samplers.translation->input && samplers.translation->output) {
-            float *times = nullptr;
-            samplers.translation->input->ExtractData(times);
-            aiVector3D *values = nullptr;
-            samplers.translation->output->ExtractData(values);
-            anim->mNumPositionKeys = static_cast<uint32_t>(samplers.translation->input->count);
-            anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys];
-            unsigned int ii = (samplers.translation->interpolation == Interpolation_CUBICSPLINE) ? 1 : 0;
-            for (unsigned int i = 0; i < anim->mNumPositionKeys; ++i) {
-                anim->mPositionKeys[i].mTime = times[i] * kMillisecondsFromSeconds;
-                anim->mPositionKeys[i].mValue = values[ii];
-                ii += (samplers.translation->interpolation == Interpolation_CUBICSPLINE) ? 3 : 1;
-            }
-            delete[] times;
-            delete[] values;
-        } else if (node.translation.isPresent) {
-            anim->mNumPositionKeys = 1;
-            anim->mPositionKeys = new aiVectorKey[anim->mNumPositionKeys];
-            anim->mPositionKeys->mTime = 0.f;
-            anim->mPositionKeys->mValue.x = node.translation.value[0];
-            anim->mPositionKeys->mValue.y = node.translation.value[1];
-            anim->mPositionKeys->mValue.z = node.translation.value[2];
-        }
-
-        if (samplers.rotation && samplers.rotation->input && samplers.rotation->output) {
-            float *times = nullptr;
-            samplers.rotation->input->ExtractData(times);
-            aiQuaternion *values = nullptr;
-            samplers.rotation->output->ExtractData(values);
-            anim->mNumRotationKeys = static_cast<uint32_t>(samplers.rotation->input->count);
-            anim->mRotationKeys = new aiQuatKey[anim->mNumRotationKeys];
-            unsigned int ii = (samplers.rotation->interpolation == Interpolation_CUBICSPLINE) ? 1 : 0;
-            for (unsigned int i = 0; i < anim->mNumRotationKeys; ++i) {
-                anim->mRotationKeys[i].mTime = times[i] * kMillisecondsFromSeconds;
-                anim->mRotationKeys[i].mValue.x = values[ii].w;
-                anim->mRotationKeys[i].mValue.y = values[ii].x;
-                anim->mRotationKeys[i].mValue.z = values[ii].y;
-                anim->mRotationKeys[i].mValue.w = values[ii].z;
-                ii += (samplers.rotation->interpolation == Interpolation_CUBICSPLINE) ? 3 : 1;
-            }
-            delete[] times;
-            delete[] values;
-        } else if (node.rotation.isPresent) {
-            anim->mNumRotationKeys = 1;
-            anim->mRotationKeys = new aiQuatKey[anim->mNumRotationKeys];
-            anim->mRotationKeys->mTime = 0.f;
-            anim->mRotationKeys->mValue.x = node.rotation.value[0];
-            anim->mRotationKeys->mValue.y = node.rotation.value[1];
-            anim->mRotationKeys->mValue.z = node.rotation.value[2];
-            anim->mRotationKeys->mValue.w = node.rotation.value[3];
-        }
-
-        if (samplers.scale && samplers.scale->input && samplers.scale->output) {
-            float *times = nullptr;
-            samplers.scale->input->ExtractData(times);
-            aiVector3D *values = nullptr;
-            samplers.scale->output->ExtractData(values);
-            anim->mNumScalingKeys = static_cast<uint32_t>(samplers.scale->input->count);
-            anim->mScalingKeys = new aiVectorKey[anim->mNumScalingKeys];
-            unsigned int ii = (samplers.scale->interpolation == Interpolation_CUBICSPLINE) ? 1 : 0;
-            for (unsigned int i = 0; i < anim->mNumScalingKeys; ++i) {
-                anim->mScalingKeys[i].mTime = times[i] * kMillisecondsFromSeconds;
-                anim->mScalingKeys[i].mValue = values[ii];
-                ii += (samplers.scale->interpolation == Interpolation_CUBICSPLINE) ? 3 : 1;
-            }
-            delete[] times;
-            delete[] values;
-        } else if (node.scale.isPresent) {
-            anim->mNumScalingKeys = 1;
-            anim->mScalingKeys = new aiVectorKey[anim->mNumScalingKeys];
-            anim->mScalingKeys->mTime = 0.f;
-            anim->mScalingKeys->mValue.x = node.scale.value[0];
-            anim->mScalingKeys->mValue.y = node.scale.value[1];
-            anim->mScalingKeys->mValue.z = node.scale.value[2];
-        }
-
-        return anim;
-    } catch (...) {
-        delete anim;
-        throw;
-    }
-}
-
-aiMeshMorphAnim *CreateMeshMorphAnim(glTF2::Asset&, Node &node, AnimationSamplers &samplers) {
-    auto *anim = new aiMeshMorphAnim();
-
-    try {
-        anim->mName = GetNodeName(node);
-
-        static const float kMillisecondsFromSeconds = 1000.f;
-
-        if (samplers.weight && samplers.weight->input && samplers.weight->output) {
-            float *times = nullptr;
-            samplers.weight->input->ExtractData(times);
-            float *values = nullptr;
-            samplers.weight->output->ExtractData(values);
-            anim->mNumKeys = static_cast<uint32_t>(samplers.weight->input->count);
-
-            // for Interpolation_CUBICSPLINE can have more outputs
-            const unsigned int weightStride = (unsigned int)samplers.weight->output->count / anim->mNumKeys;
-            const unsigned int numMorphs = (samplers.weight->interpolation == Interpolation_CUBICSPLINE) ? weightStride - 2 : weightStride;
-
-            anim->mKeys = new aiMeshMorphKey[anim->mNumKeys];
-            unsigned int ii = (samplers.weight->interpolation == Interpolation_CUBICSPLINE) ? 1 : 0;
-            for (unsigned int i = 0u; i < anim->mNumKeys; ++i) {
-                unsigned int k = weightStride * i + ii;
-                anim->mKeys[i].mTime = times[i] * kMillisecondsFromSeconds;
-                anim->mKeys[i].mNumValuesAndWeights = numMorphs;
-                anim->mKeys[i].mValues = new unsigned int[numMorphs];
-                anim->mKeys[i].mWeights = new double[numMorphs];
-
-                for (unsigned int j = 0u; j < numMorphs; ++j, ++k) {
-                    anim->mKeys[i].mValues[j] = j;
-                    anim->mKeys[i].mWeights[j] = (0.f > values[k]) ? 0.f : values[k];
-                }
-            }
-
-            delete[] times;
-            delete[] values;
-        }
-
-        return anim;
-    } catch (...) {
-        delete anim;
-        throw;
-    }
-}
-
-std::unordered_map<unsigned int, AnimationSamplers> GatherSamplers(Animation &anim) {
-    std::unordered_map<unsigned int, AnimationSamplers> samplers;
-    for (unsigned int c = 0; c < anim.channels.size(); ++c) {
-        Animation::Channel &channel = anim.channels[c];
-        if (channel.sampler < 0 || channel.sampler >= static_cast<int>(anim.samplers.size())) {
-            continue;
-        }
-
-        auto& animsampler = anim.samplers[channel.sampler];
-
-        if (!animsampler.input) {
-            ASSIMP_LOG_WARN("Animation ", anim.name, ": Missing sampler input. Skipping.");
-            continue;
-        }
-
-        if (!animsampler.output) {
-            ASSIMP_LOG_WARN("Animation ", anim.name, ": Missing sampler output. Skipping.");
-            continue;
-        }
-
-        if (animsampler.input->count > animsampler.output->count) {
-            ASSIMP_LOG_WARN("Animation ", anim.name, ": Number of keyframes in sampler input ", animsampler.input->count, " exceeds number of keyframes in sampler output ", animsampler.output->count);
-            continue;
-        }
-
-        const unsigned int node_index = channel.target.node.GetIndex();
-
-        AnimationSamplers &sampler = samplers[node_index];
-        if (channel.target.path == AnimationPath_TRANSLATION) {
-            sampler.translation = &anim.samplers[channel.sampler];
-        } else if (channel.target.path == AnimationPath_ROTATION) {
-            sampler.rotation = &anim.samplers[channel.sampler];
-        } else if (channel.target.path == AnimationPath_SCALE) {
-            sampler.scale = &anim.samplers[channel.sampler];
-        } else if (channel.target.path == AnimationPath_WEIGHTS) {
-            sampler.weight = &anim.samplers[channel.sampler];
-        }
-    }
-
-    return samplers;
-}
-
-void glTF2Importer::ImportAnimations(glTF2::Asset &r) {
-    if (!r.scene) return;
-
-    const unsigned numAnimations = r.animations.Size();
-    ASSIMP_LOG_DEBUG("Importing ", numAnimations, " animations");
-    mScene->mNumAnimations = numAnimations;
-    if (mScene->mNumAnimations == 0) {
-        return;
-    }
-
-    mScene->mAnimations = new aiAnimation *[numAnimations];
-    std::fill(mScene->mAnimations, mScene->mAnimations + numAnimations, nullptr);
-
-    for (unsigned int i = 0; i < numAnimations; ++i) {
-        aiAnimation *ai_anim = mScene->mAnimations[i] = new aiAnimation();
-
-        Animation &anim = r.animations[i];
-
-        ai_anim->mName = anim.name;
-        ai_anim->mDuration = 0;
-        ai_anim->mTicksPerSecond = 0;
-
-        std::unordered_map<unsigned int, AnimationSamplers> samplers = GatherSamplers(anim);
-
-        uint32_t numChannels = 0u;
-        uint32_t numMorphMeshChannels = 0u;
-
-        for (auto &iter : samplers) {
-            if ((nullptr != iter.second.rotation) || (nullptr != iter.second.scale) || (nullptr != iter.second.translation)) {
-                ++numChannels;
-            }
-            if (nullptr != iter.second.weight) {
-                ++numMorphMeshChannels;
-            }
-        }
-
-        ai_anim->mNumChannels = numChannels;
-        if (ai_anim->mNumChannels > 0) {
-            ai_anim->mChannels = new aiNodeAnim *[ai_anim->mNumChannels];
-            std::fill(ai_anim->mChannels, ai_anim->mChannels + ai_anim->mNumChannels, nullptr);
-            int j = 0;
-            for (auto &iter : samplers) {
-                if ((nullptr != iter.second.rotation) || (nullptr != iter.second.scale) || (nullptr != iter.second.translation)) {
-                    ai_anim->mChannels[j] = CreateNodeAnim(r, r.nodes[iter.first], iter.second);
-                    ++j;
-                }
-            }
-        }
-
-        ai_anim->mNumMorphMeshChannels = numMorphMeshChannels;
-        if (ai_anim->mNumMorphMeshChannels > 0) {
-            ai_anim->mMorphMeshChannels = new aiMeshMorphAnim *[ai_anim->mNumMorphMeshChannels];
-            std::fill(ai_anim->mMorphMeshChannels, ai_anim->mMorphMeshChannels + ai_anim->mNumMorphMeshChannels, nullptr);
-            int j = 0;
-            for (auto &iter : samplers) {
-                if (nullptr != iter.second.weight) {
-                    ai_anim->mMorphMeshChannels[j] = CreateMeshMorphAnim(r, r.nodes[iter.first], iter.second);
-                    ++j;
-                }
-            }
-        }
-
-        // Use the latest key-frame for the duration of the animation
-        double maxDuration = 0;
-        unsigned int maxNumberOfKeys = 0;
-        for (unsigned int j = 0; j < ai_anim->mNumChannels; ++j) {
-            auto chan = ai_anim->mChannels[j];
-            if (chan->mNumPositionKeys) {
-                auto lastPosKey = chan->mPositionKeys[chan->mNumPositionKeys - 1];
-                if (lastPosKey.mTime > maxDuration) {
-                    maxDuration = lastPosKey.mTime;
-                }
-                maxNumberOfKeys = std::max(maxNumberOfKeys, chan->mNumPositionKeys);
-            }
-            if (chan->mNumRotationKeys) {
-                auto lastRotKey = chan->mRotationKeys[chan->mNumRotationKeys - 1];
-                if (lastRotKey.mTime > maxDuration) {
-                    maxDuration = lastRotKey.mTime;
-                }
-                maxNumberOfKeys = std::max(maxNumberOfKeys, chan->mNumRotationKeys);
-            }
-            if (chan->mNumScalingKeys) {
-                auto lastScaleKey = chan->mScalingKeys[chan->mNumScalingKeys - 1];
-                if (lastScaleKey.mTime > maxDuration) {
-                    maxDuration = lastScaleKey.mTime;
-                }
-                maxNumberOfKeys = std::max(maxNumberOfKeys, chan->mNumScalingKeys);
-            }
-        }
-
-        for (unsigned int j = 0; j < ai_anim->mNumMorphMeshChannels; ++j) {
-            const auto *const chan = ai_anim->mMorphMeshChannels[j];
-
-            if (0u != chan->mNumKeys) {
-                const auto &lastKey = chan->mKeys[chan->mNumKeys - 1u];
-                if (lastKey.mTime > maxDuration) {
-                    maxDuration = lastKey.mTime;
-                }
-                maxNumberOfKeys = std::max(maxNumberOfKeys, chan->mNumKeys);
-            }
-        }
-
-        ai_anim->mDuration = maxDuration;
-        ai_anim->mTicksPerSecond = 1000.0;
-    }
-}
-
-static unsigned int countEmbeddedTextures(glTF2::Asset &r) {
-    unsigned int numEmbeddedTexs = 0;
-    for (size_t i = 0; i < r.images.Size(); ++i) {
-        if (r.images[i].HasData()) {
-            numEmbeddedTexs += 1;
-        }
-    }
-
-    return numEmbeddedTexs;
-}
-
-void glTF2Importer::ImportEmbeddedTextures(glTF2::Asset &r) {
-    mEmbeddedTexIdxs.resize(r.images.Size(), -1);
-    const unsigned int numEmbeddedTexs = countEmbeddedTextures(r);
-    if (numEmbeddedTexs == 0) {
-        return;
-    }
-
-    ASSIMP_LOG_DEBUG("Importing ", numEmbeddedTexs, " embedded textures");
-
-    mScene->mTextures = new aiTexture *[numEmbeddedTexs];
-    std::fill(mScene->mTextures, mScene->mTextures + numEmbeddedTexs, nullptr);
-
-    // Add the embedded textures
-    for (size_t i = 0; i < r.images.Size(); ++i) {
-        Image &img = r.images[i];
-        if (!img.HasData()) {
-            continue;
-        }
-
-        int idx = mScene->mNumTextures++;
-        mEmbeddedTexIdxs[i] = idx;
-
-        aiTexture *tex = mScene->mTextures[idx] = new aiTexture();
-
-        size_t length = img.GetDataLength();
-        void *data = img.StealData();
-
-        tex->mFilename = img.name;
-        tex->mWidth = static_cast<unsigned int>(length);
-        tex->mHeight = 0;
-        tex->pcData = reinterpret_cast<aiTexel *>(data);
-
-        if (!img.mimeType.empty()) {
-            const char *ext = strchr(img.mimeType.c_str(), '/') + 1;
-            if (ext) {
-                if (strcmp(ext, "jpeg") == 0) {
-                    ext = "jpg";
-                } else if(strcmp(ext, "ktx2") == 0) { //basisu: ktx remains
-                    ext = "kx2";
-                } else if(strcmp(ext, "basis") == 0) { //basisu
-                    ext = "bu";
-                }
-
-                size_t len = strlen(ext);
-                if (len <= 3) {
-                    strcpy(tex->achFormatHint, ext);
-                }
-            }
-        }
-    }
-}
-
-void glTF2Importer::ImportCommonMetadata(glTF2::Asset& a) {
-    ASSIMP_LOG_DEBUG("Importing metadata");
-    ai_assert(mScene->mMetaData == nullptr);
-    const bool hasVersion = !a.asset.version.empty();
-    const bool hasGenerator = !a.asset.generator.empty();
-    const bool hasCopyright = !a.asset.copyright.empty();
-    const bool hasSceneMetadata = a.scene->customExtensions;
-    if (hasVersion || hasGenerator || hasCopyright || hasSceneMetadata) {
-        mScene->mMetaData = new aiMetadata;
-        if (hasVersion) {
-            mScene->mMetaData->Add(AI_METADATA_SOURCE_FORMAT_VERSION, aiString(a.asset.version));
-        }
-        if (hasGenerator) {
-            mScene->mMetaData->Add(AI_METADATA_SOURCE_GENERATOR, aiString(a.asset.generator));
-        }
-        if (hasCopyright) {
-            mScene->mMetaData->Add(AI_METADATA_SOURCE_COPYRIGHT, aiString(a.asset.copyright));
-        }
-        if (hasSceneMetadata) {
-            ParseExtensions(mScene->mMetaData, a.scene->customExtensions);
-        }
-    }
-}
-
-void glTF2Importer::InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) {
-    ASSIMP_LOG_DEBUG("Reading GLTF2 file");
-
-    // clean all member arrays
-    meshOffsets.clear();
-    mEmbeddedTexIdxs.clear();
-
-    this->mScene = pScene;
-
-    // read the asset file
-  	glTF2::Asset asset(pIOHandler, static_cast<rapidjson::IRemoteSchemaDocumentProvider*>(mSchemaDocumentProvider));
-    asset.Load(pFile, GetExtension(pFile) == "glb");
-    if (asset.scene) {
-        pScene->mName = asset.scene->name;
-    }
-
-    // Copy the data out
-    ImportEmbeddedTextures(asset);
-    ImportMaterials(asset);
-
-    ImportMeshes(asset);
-
-    ImportCameras(asset);
-    ImportLights(asset);
-
-    ImportNodes(asset);
-
-    ImportAnimations(asset);
-
-    ImportCommonMetadata(asset);
-
-    if (pScene->mNumMeshes == 0) {
-        pScene->mFlags |= AI_SCENE_FLAGS_INCOMPLETE;
-    }
-}
-
-void glTF2Importer::SetupProperties(const Importer *pImp) {
-    mSchemaDocumentProvider = static_cast<rapidjson::IRemoteSchemaDocumentProvider*>(pImp->GetPropertyPointer(AI_CONFIG_IMPORT_SCHEMA_DOCUMENT_PROVIDER));
-}
-
-#endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
diff --git a/libs/assimp/code/AssetLib/glTF2/glTF2Importer.h b/libs/assimp/code/AssetLib/glTF2/glTF2Importer.h
deleted file mode 100644
index 831bcd7..0000000
--- a/libs/assimp/code/AssetLib/glTF2/glTF2Importer.h
+++ /dev/null
@@ -1,91 +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 AI_GLTF2IMPORTER_H_INC
-#define AI_GLTF2IMPORTER_H_INC
-
-#include <assimp/BaseImporter.h>
-
-struct aiNode;
-
-namespace glTF2 {
-    class Asset;
-}
-
-namespace Assimp {
-
-/**
- * Load the glTF2 format.
- * https://github.com/KhronosGroup/glTF/tree/master/specification
- */
-class glTF2Importer : public BaseImporter {
-public:
-    glTF2Importer();
-    ~glTF2Importer() override;
-    bool CanRead(const std::string &pFile, IOSystem *pIOHandler, bool checkSig) const override;
-
-protected:
-    const aiImporterDesc *GetInfo() const override;
-    void InternReadFile(const std::string &pFile, aiScene *pScene, IOSystem *pIOHandler) override;
-    virtual void SetupProperties(const Importer *pImp) override;
-
-private:
-    void ImportEmbeddedTextures(glTF2::Asset &a);
-    void ImportMaterials(glTF2::Asset &a);
-    void ImportMeshes(glTF2::Asset &a);
-    void ImportCameras(glTF2::Asset &a);
-    void ImportLights(glTF2::Asset &a);
-    void ImportNodes(glTF2::Asset &a);
-    void ImportAnimations(glTF2::Asset &a);
-    void ImportCommonMetadata(glTF2::Asset &a);
-
-private:
-    std::vector<unsigned int> meshOffsets;
-    std::vector<int> mEmbeddedTexIdxs;
-    aiScene *mScene;
-
-    /// An instance of rapidjson::IRemoteSchemaDocumentProvider
-    void *mSchemaDocumentProvider = nullptr;
-};
-
-} // namespace Assimp
-
-#endif // AI_GLTF2IMPORTER_H_INC