assimp/code/AssetLib/glTF2/glTF2Importer.h

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

Copyright (c) 2006-2024, assimp team


All rights reserved.

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* 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
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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