assimp/code/AssetLib/glTF/glTFExporter.h

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

Copyright (c) 2006-2021, assimp team


All rights reserved.

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following disclaimer.

* Redistributions in binary form must reproduce the above
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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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

#if !defined(ASSIMP_BUILD_NO_GLTF_EXPORTER) && !defined(ASSIMP_BUILD_NO_GLTF1_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