assimp/code/AssetLib/glTF/glTFExporter.h

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

Copyright (c) 2006-2020, 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
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following disclaimer.

* Redistributions in binary form must reproduce the above
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following disclaimer in the documentation and/or other
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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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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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*/

/** @file GltfExporter.h
* Declares the exporter class to write a scene to a gltf/glb file
*/
#ifndef AI_GLTFEXPORTER_H_INC
#define AI_GLTFEXPORTER_H_INC

#ifndef ASSIMP_BUILD_NO_GLTF_EXPORTER

#include <assimp/types.h>
#include <assimp/material.h>

#include <sstream>
#include <vector>
#include <map>
#include <memory>

struct aiScene;
struct aiNode;
struct aiMaterial;

namespace glTF
{
    template<class T>
    class Ref;

    class Asset;
    struct TexProperty;
    struct Node;
}

namespace Assimp
{
    class IOSystem;
    class IOStream;
    class ExportProperties;

    // ------------------------------------------------------------------------------------------------
    /** Helper class to export a given scene to an glTF file. */
    // ------------------------------------------------------------------------------------------------
    class glTFExporter
    {
    public:
        /// Constructor for a specific scene to export
        glTFExporter(const char* filename, IOSystem* pIOSystem, const aiScene* pScene,
            const ExportProperties* pProperties, bool binary);

    private:

        const char* mFilename;
        IOSystem* mIOSystem;
        std::shared_ptr<const aiScene> mScene;
        const ExportProperties* mProperties;

        std::map<std::string, unsigned int> mTexturesByPath;

        std::shared_ptr<glTF::Asset> mAsset;

        std::vector<unsigned char> mBodyData;

        void WriteBinaryData(IOStream* outfile, std::size_t sceneLength);

        void GetTexSampler(const aiMaterial* mat, glTF::TexProperty& prop);
        void GetMatColorOrTex(const aiMaterial* mat, glTF::TexProperty& prop, const char* propName, int type, int idx, aiTextureType tt);
        void ExportMetadata();
        void ExportMaterials();
        void ExportMeshes();
        unsigned int ExportNodeHierarchy(const aiNode* n);
        unsigned int ExportNode(const aiNode* node, glTF::Ref<glTF::Node>& parent);
        void ExportScene();
        void ExportAnimations();
    };

}

#endif // ASSIMP_BUILD_NO_GLTF_EXPORTER

#endif // AI_GLTFEXPORTER_H_INC