/*

Open Asset Import Library (assimp)

----------------------------------------------------------------------

Copyright (c) 2006-2025, 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

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* 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

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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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*/

/** @file glTFAsset.h

 * Declares a glTF class to handle gltf/glb files

 *

 * glTF Extensions Support:

 *   KHR_materials_pbrSpecularGlossiness full

 *   KHR_materials_specular 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

 *   KHR_materials_emissive_strength full

 *   KHR_materials_anisotropy 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 <unordered_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/glTFCommon/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) = default;

    CustomExtension& operator=(const CustomExtension&) = default;

};

//! Represents metadata in an glTF2 object

struct Extras {

    std::vector<CustomExtension> mValues;

    inline bool HasExtras() const {

        return !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;

    Extras extras;

    //! Objects marked as special are not exported (used to emulate the binary body buffer)

    virtual bool IsSpecial() const { return false; }

    virtual ~Object() = default;

    //! 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() override;

    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 *GetPointerAndTailSize(size_t accOffset, size_t& outTailSize);

};

//! 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>

    size_t ExtractData(T *&outData, const std::vector<unsigned int> *remappingIndices = nullptr);

    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() = default;

    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, const 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() = default;

    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 defaultSpecularColorFactor = { 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 MaterialSpecular {

    float specularFactor;

    vec3 specularColorFactor;

    TextureInfo specularTexture;

    TextureInfo specularColorTexture;

    MaterialSpecular() { 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();

};

struct MaterialEmissiveStrength {

    float emissiveStrength = 0.f;

    MaterialEmissiveStrength() { SetDefaults(); }

    void SetDefaults();

};

struct MaterialAnisotropy {

    float anisotropyStrength = 0.f;

    float anisotropyRotation = 0.f;

    TextureInfo anisotropyTexture;

    MaterialAnisotropy() { 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_specular

    Nullable<MaterialSpecular> materialSpecular;

    //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_emissive_strength

    Nullable<MaterialEmissiveStrength> materialEmissiveStrength;

    //extension: KHR_materials_anisotropy

    Nullable<MaterialAnisotropy> materialAnisotropy;

    //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() = default;

    /// 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() = default;

    void Read(Value &obj, Asset &r);

};

struct Program : public Object {

    Program() = default;

    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() = default;

    void Read(Value &obj, Asset &r);

};

struct Shader : public Object {

    Shader() = default;

    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() = default;

    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() = default;

    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() = default;

    void Read(Value &obj, Asset &r);

};

//! Base class for LazyDict that acts as an interface

class LazyDictBase {

public:

    virtual ~LazyDictBase() = default;

    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); }

Unexecuted instantiation: glTF2::LazyDict<glTF2::Accessor>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Animation>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Buffer>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::BufferView>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Camera>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Light>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Image>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Material>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Mesh>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Node>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Sampler>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Scene>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Skin>::WriteObjects(glTF2::AssetWriter&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Texture>::WriteObjects(glTF2::AssetWriter&)

#endif

    Ref<T> Add(T *obj);

public:

    LazyDict(Asset &asset, const char *dictId, const char *extId = nullptr);

    ~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()); }

Unexecuted instantiation: glTF2::LazyDict<glTF2::BufferView>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Accessor>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Texture>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Image>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Material>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Buffer>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Skin>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Mesh>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Node>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Scene>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)

Unexecuted instantiation: glTF2::LazyDict<glTF2::Animation>::Create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)