assimp/code/PlyLoader.h

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

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  copyright notice, this list of conditions and the
  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  PLYLoader.h
 *  @brief Declaration of the .ply importer class.
 */
#ifndef AI_PLYLOADER_H_INCLUDED
#define AI_PLYLOADER_H_INCLUDED

#include "BaseImporter.h"
#include <assimp/types.h>
#include "PlyParser.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();


public:

    // -------------------------------------------------------------------
    /** 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;

protected:

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

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

protected:


    // -------------------------------------------------------------------
    /** Extract vertices from the DOM
    */
    void LoadVertices(std::vector<aiVector3D>* pvOut,
        bool p_bNormals = false);

    // -------------------------------------------------------------------
    /** Extract vertex color channels from the DOM
    */
    void LoadVertexColor(std::vector<aiColor4D>* pvOut);

    // -------------------------------------------------------------------
    /** Extract texture coordinate channels from the DOM
    */
    void LoadTextureCoordinates(std::vector<aiVector2D>* pvOut);

    // -------------------------------------------------------------------
    /** Extract a face list from the DOM
    */
    void LoadFaces(std::vector<PLY::Face>* pvOut);

    // -------------------------------------------------------------------
    /** Extract a material list from the DOM
    */
    void LoadMaterial(std::vector<aiMaterial*>* pvOut);


    // -------------------------------------------------------------------
    /** Validate material indices, replace default material identifiers
    */
    void ReplaceDefaultMaterial(std::vector<PLY::Face>* avFaces,
        std::vector<aiMaterial*>* avMaterials);


    // -------------------------------------------------------------------
    /** Convert all meshes into our ourer representation
    */
    void ConvertMeshes(std::vector<PLY::Face>* avFaces,
        const std::vector<aiVector3D>* avPositions,
        const std::vector<aiVector3D>* avNormals,
        const std::vector<aiColor4D>* avColors,
        const std::vector<aiVector2D>* avTexCoords,
        const std::vector<aiMaterial*>* avMaterials,
        std::vector<aiMesh*>* avOut);


    // -------------------------------------------------------------------
    /** 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;
};

} // end of namespace Assimp

#endif // AI_3DSIMPORTER_H_INC