assimp/code/AssetLib/Ply/PlyLoader.h

/*
Open Asset Import Library (assimp)
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*/

/** @file  PLYLoader.h
 *  @brief Declaration of the .ply importer class.
 */
#pragma once
#ifndef AI_PLYLOADER_H_INCLUDED
#define AI_PLYLOADER_H_INCLUDED

#include "PlyParser.h"
#include <assimp/BaseImporter.h>
#include <assimp/types.h>
#include <vector>

struct aiNode;
struct aiMaterial;
struct aiMesh;

namespace Assimp {

using namespace PLY;

// ---------------------------------------------------------------------------
/** Importer class to load the stanford PLY file format
*/
class PLYImporter : public BaseImporter {
public:
    PLYImporter();
    ~PLYImporter() override;

    // -------------------------------------------------------------------
    /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.
     */
    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
            bool checkSig) const override;

    // -------------------------------------------------------------------
    /** Extract a vertex from the DOM
    */
    void LoadVertex(const PLY::Element *pcElement, const PLY::ElementInstance *instElement, unsigned int pos);

    // -------------------------------------------------------------------
    /** Extract a face from the DOM
    */
    void LoadFace(const PLY::Element *pcElement, const PLY::ElementInstance *instElement, unsigned int pos);

protected:
    // -------------------------------------------------------------------
    /** Return importer meta information.
     * See #BaseImporter::GetInfo for the details
     */
    const aiImporterDesc *GetInfo() const override;

    // -------------------------------------------------------------------
    /** Imports the given file into the given scene structure.
    * See BaseImporter::InternReadFile() for details
    */
    void InternReadFile(const std::string &pFile, aiScene *pScene,
            IOSystem *pIOHandler) override;

    // -------------------------------------------------------------------
    /** Extract a material list from the DOM
    */
    void LoadMaterial(std::vector<aiMaterial *> *pvOut, std::string &defaultTexture, const bool pointsOnly);

    // -------------------------------------------------------------------
    /** Static helper to parse a color from four single channels in
    */
    static void GetMaterialColor(
            const std::vector<PLY::PropertyInstance> &avList,
            unsigned int aiPositions[4],
            PLY::EDataType aiTypes[4],
            aiColor4D *clrOut);

    // -------------------------------------------------------------------
    /** Static helper to parse a color channel value. The input value
    *  is normalized to 0-1.
    */
    static ai_real NormalizeColorValue(
            PLY::PropertyInstance::ValueUnion val,
            PLY::EDataType eType);

    /** Buffer to hold the loaded file */
    unsigned char *mBuffer;

    /** Document object model representation extracted from the file */
    PLY::DOM *pcDOM;

    /** Mesh generated by loader */
    aiMesh *mGeneratedMesh;
};

} // end of namespace Assimp

#endif // AI_3DSIMPORTER_H_INC