Torque3D/Engine/lib/assimp/code/Obj/ObjFileParser.h

/*
Open Asset Import Library (assimp)
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Copyright (c) 2006-2020, assimp team


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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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*/
#ifndef OBJ_FILEPARSER_H_INC
#define OBJ_FILEPARSER_H_INC

#include <vector>
#include <string>
#include <map>
#include <memory>
#include <assimp/vector2.h>
#include <assimp/vector3.h>
#include <assimp/mesh.h>
#include <assimp/IOStreamBuffer.h>

namespace Assimp {

namespace ObjFile {
    struct Model;
    struct Object;
    struct Material;
    struct Point3;
    struct Point2;
}

class ObjFileImporter;
class IOSystem;
class ProgressHandler;

/// \class  ObjFileParser
/// \brief  Parser for a obj waveform file
class ASSIMP_API ObjFileParser {
public:
    static const size_t Buffersize = 4096;
    typedef std::vector<char> DataArray;
    typedef std::vector<char>::iterator DataArrayIt;
    typedef std::vector<char>::const_iterator ConstDataArrayIt;

public:
    /// @brief  The default constructor.
    ObjFileParser();
    /// @brief  Constructor with data array.
    ObjFileParser(IOStreamBuffer<char> &streamBuffer, const std::string &modelName, IOSystem* io, ProgressHandler* progress, std::string originalObjFileName);
    /// @brief  Destructor
    ~ObjFileParser();
    /// @brief  If you want to load in-core data.
    void setBuffer( std::vector<char> &buffer );
    /// @brief  Model getter.
    ObjFile::Model *GetModel() const;

protected:
    /// Parse the loaded file
    void parseFile( IOStreamBuffer<char> &streamBuffer );
    /// Method to copy the new delimited word in the current line.
    void copyNextWord(char *pBuffer, size_t length);
    /// Method to copy the new line.
//    void copyNextLine(char *pBuffer, size_t length);
    /// Get the number of components in a line.
    size_t getNumComponentsInDataDefinition();
    /// Stores the vector
    size_t getTexCoordVector( std::vector<aiVector3D> &point3d_array );
    /// Stores the following 3d vector.
    void getVector3( std::vector<aiVector3D> &point3d_array );
    /// Stores the following homogeneous vector as a 3D vector
    void getHomogeneousVector3( std::vector<aiVector3D> &point3d_array );
    /// Stores the following two 3d vectors on the line.
    void getTwoVectors3( std::vector<aiVector3D> &point3d_array_a, std::vector<aiVector3D> &point3d_array_b );
    /// Stores the following 3d vector.
    void getVector2(std::vector<aiVector2D> &point2d_array);
    /// Stores the following face.
    void getFace(aiPrimitiveType type);
    /// Reads the material description.
    void getMaterialDesc();
    /// Gets a comment.
    void getComment();
    /// Gets a a material library.
    void getMaterialLib();
    /// Creates a new material.
    void getNewMaterial();
    /// Gets the group name from file.
    void getGroupName();
    /// Gets the group number from file.
    void getGroupNumber();
    /// Gets the group number and resolution from file.
    void getGroupNumberAndResolution();
    /// Returns the index of the material. Is -1 if not material was found.
    int getMaterialIndex( const std::string &strMaterialName );
    /// Parse object name
    void getObjectName();
    /// Creates a new object.
    void createObject( const std::string &strObjectName );
    /// Creates a new mesh.
    void createMesh( const std::string &meshName );
    /// Returns true, if a new mesh instance must be created.
    bool needsNewMesh( const std::string &rMaterialName );
    /// Error report in token
    void reportErrorTokenInFace();

private:
    // Copy and assignment constructor should be private
    // because the class contains pointer to allocated memory
    ObjFileParser(const ObjFileParser& rhs);
    ObjFileParser& operator=(const ObjFileParser& rhs);

    /// Default material name
    static const std::string DEFAULT_MATERIAL;
    //! Iterator to current position in buffer
    DataArrayIt m_DataIt;
    //! Iterator to end position of buffer
    DataArrayIt m_DataItEnd;
    //! Pointer to model instance
    std::unique_ptr<ObjFile::Model> m_pModel;
    //! Current line (for debugging)
    unsigned int m_uiLine;
    //! Helper buffer
    char m_buffer[Buffersize];
    /// Pointer to IO system instance.
    IOSystem *m_pIO;
    //! Pointer to progress handler
    ProgressHandler* m_progress;
    /// Path to the current model, name of the obj file where the buffer comes from
    const std::string m_originalObjFileName;
};

}   // Namespace Assimp

#endif