assimp/code/AssetLib/Obj/ObjFileParser.h

/*
Open Asset Import Library (assimp)
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  following disclaimer.

* Redistributions in binary form must reproduce the above
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  written permission of the assimp team.

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*/
#ifndef OBJ_FILEPARSER_H_INC
#define OBJ_FILEPARSER_H_INC

#include "ObjFileData.h"

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

namespace Assimp {

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;

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

    ObjFileParser(const ObjFileParser&) = delete;
    ObjFileParser &operator=(const ObjFileParser& ) = delete;

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:
    /// Default material name
    static constexpr const char DEFAULT_MATERIAL[] = AI_DEFAULT_MATERIAL_NAME;
    //! 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];
    const char *mEnd; 
    /// 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