objfilereader.h

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/*
* Copyright 2015 Autodesk, Inc. All rights reserved.
* Use of this software is subject to the terms of the Autodesk license agreement and any attachments or Appendices thereto provided at the time of installation or download,
* or which otherwise accompanies this software in either electronic or hard copy form, or which is signed by you and accepted by Autodesk.
*/


// primary contact: JAPA - secondary contact: GUAL
#ifndef Navigatio_ObjFileReader_H
#define Navigatio_ObjFileReader_H

#include "gwnavruntime/math/vec3f.h"
#include "gwnavruntime/containers/kyarray.h"
#include "gwnavruntime/kernel/SF_String.h"
#include "gwnavruntime/math/box3f.h"
#include "gwnavruntime/kernel/SF_File.h"

namespace Kaim
{

class FileOpenerBase;
class CoordSystem;

class ObjFileReader
{
    KY_DEFINE_NEW_DELETE_OPERATORS(Stat_Default_Mem)
    KY_CLASS_WITHOUT_COPY(ObjFileReader)
public:
    ObjFileReader();

    ~ObjFileReader();

    KyResult ReadObjFile(Ptr<File> objFileToRead);

    // ---------------------------------- Parsed data ----------------------------------
    KyUInt32 VerticesCount() const { return m_vertices.GetCount();   }
    const Vec3f* Vertices()  const { return m_vertices.GetDataPtr(); }

    KyUInt32 IndicesCount()   const { return m_indices.GetCount();   }
    const KyUInt32* Indices() const { return m_indices.GetDataPtr(); }

    KyUInt32 GetFacesCount() const { return m_facesCount; }
    KyUInt32 GetFaceMinVertexCount() const { return m_faceMinVertexCount; }
    KyUInt32 GetFaceMaxVertexCount() const { return m_faceMaxVertexCount; }

    // ---------------------------------- Misc ----------------------------------
    void Clear();

    Box3f ComputeBoundingBox() const;
    Box3f ComputeBoundingBox(const CoordSystem& coordSystem) const;

    const char* GetFileName() const { return m_file != KY_NULL ? m_file->GetFilePath() : KY_NULL; }
    
private:
    KyResult ReadPosition(const char* str, Vec3f& pos);
    KyResult ReadFace(const char* str);
    KyResult ReadFaceFast(const char* str);

    KyResult ReadContent();

    KyResult ReadNextChunk();
    char* ReadLine();

private:
    char*        m_line;
    char*        m_fileIOBuffer;
    const char*  m_endOfReadFileChunk;
    char*        m_currentPosInBuffer;
    Ptr<File>    m_file;

    const KyUInt32 m_maxLineSize;
    const KyUInt32 m_maxBufferSize;

    KyUInt32 m_facesCount;
    KyUInt32 m_faceMinVertexCount;
    KyUInt32 m_faceMaxVertexCount;

    // current file data
    KyArray<Vec3f>       m_vertices;
    KyArrayPOD<KyUInt32> m_indices;
    KyArrayPOD<KyUInt32> m_faceIndices;
};


}


#endif // Navigatio_ObjFileReader_H