assimp/code/AssetLib/glTF2/glTF2Importer.h

/*
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,
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following disclaimer.

* Redistributions in binary form must reproduce the above
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* Neither the name of the assimp team, nor the names of its
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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
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*/
#ifndef AI_GLTF2IMPORTER_H_INC
#define AI_GLTF2IMPORTER_H_INC

#include <assimp/BaseImporter.h>
#include <AssetLib/glTF2/glTF2Asset.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 = default;
    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;
    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);
    aiNode *ImportNode(glTF2::Asset &r, glTF2::Ref<glTF2::Node> &ptr);

private:
    std::vector<unsigned int> meshOffsets;
    std::vector<int> mEmbeddedTexIdxs;
    std::vector<std::vector<unsigned int>> mVertexRemappingTables; // for each converted aiMesh in the scene, it stores a list of vertices that are actually used
    aiScene *mScene;

    /// An instance of rapidjson::IRemoteSchemaDocumentProvider
    void *mSchemaDocumentProvider = nullptr;
};

} // namespace Assimp

#endif // AI_GLTF2IMPORTER_H_INC