assimp/code/Pbrt/PbrtExporter.h

/*
Open Asset Import Library (assimp)
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All rights reserved.

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

/** @file PbrtExporter.h
* Declares the exporter class to write a scene to a pbrt file
*/
#ifndef AI_PBRTEXPORTER_H_INC
#define AI_PBRTEXPORTER_H_INC

#ifndef ASSIMP_BUILD_NO_PBRT_EXPORTER

#include <assimp/types.h>
#include <assimp/StreamWriter.h>
#include <assimp/Exceptional.h>

#include <map>
#include <set>
#include <string>
#include <sstream>

struct aiScene;
struct aiNode;
struct aiMaterial;
struct aiMesh;

namespace Assimp {

class IOSystem;
class IOStream;
class ExportProperties;

// ---------------------------------------------------------------------
/** Helper class to export a given scene to a Pbrt file. */
// ---------------------------------------------------------------------
class PbrtExporter {
public:
    /// Constructor for a specific scene to export
    PbrtExporter(const aiScene *pScene, IOSystem *pIOSystem,
            const std::string &path, const std::string &file);

    /// Destructor
    virtual ~PbrtExporter() = default;

private:
    aiMatrix4x4 GetNodeTransform(const aiString &name) const;
    static std::string TransformAsString(const aiMatrix4x4 &m);
    static std::string RemoveSuffix(std::string filename);
    std::string CleanTextureFilename(const aiString &f, bool rewriteExtension = true) const;
    void WriteMetaData();
    void WriteWorldDefinition();
    void WriteCameras();
    void WriteCamera(int i);
    void WriteLights();
    void WriteTextures();
    static bool TextureHasAlphaMask(const std::string &filename);
    void WriteMaterials();
    void WriteMaterial(int i);
    void WriteMesh(aiMesh *mesh);
    void WriteInstanceDefinition(int i);
    void WriteGeometricObjects(aiNode *node, aiMatrix4x4 parentTransform,
            std::map<int, int> &meshUses);

private:
    // the scene to export
    const aiScene* mScene;

    /// Stringstream to write all output into
    std::stringstream mOutput;

    /// The IOSystem for output
    IOSystem* mIOSystem;

    /// Path of the directory where the scene will be exported
    const std::string mPath;

    /// Name of the file (without extension) where the scene will be exported
    const std::string mFile;

    //  A private set to keep track of which textures have been declared
    std::set<std::string> mTextureSet;

    // Transform to apply to the root node and all root objects such as cameras, lights, etc.
    aiMatrix4x4 mRootTransform;
};

} // namespace Assimp

#endif // ASSIMP_BUILD_NO_PBRT_EXPORTER

#endif // AI_PBRTEXPORTER_H_INC