Keos3DSLoader.h

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/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */
#ifndef KEOS_3DSLOADER_H
#define KEOS_3DSLOADER_H

#include "KeosPrerequisites.h"
#include "KeosLoader.h"
#include "KeosMesh.h"

namespace Keos
{
  //-----------------------------------------------------------------------
  class C3DSLoader : public ILoader<CMesh>
  {
  public :

    C3DSLoader();

    virtual CMesh* LoadFromFile(const String& strFilename);

  private :

#define CHUNK_PRIMARY       0x4D4D

#define CHUNK_OBJECTINFO  0x3D3D // This gives the version of the mesh and is found right before the material and object information
#define CHUNK_VERSION   0x0002 // This gives the version of the .3ds file
#define CHUNK_EDITKEYFRAME  0xB000 // This is the header for all of the key frame info

#define CHUNK_MATERIAL   0xAFFF // This stored the texture info
#define CHUNK_OBJECT   0x4000 // This stores the faces, vertices, etc...

#define CHUNK_MATNAME   0xA000 // This holds the material name
#define CHUNK_MATDIFFUSE  0xA020 // This holds the color of the object/material
#define CHUNK_MATMAP   0xA200 // This is a header for a new material
#define CHUNK_MATMAPFILE  0xA300 // This holds the file name of the texture

#define CHUNK_OBJECT_MESH  0x4100 // This lets us know that we are reading a new object

#define CHUNK_OBJECT_VERTICES   0x4110 // The objects vertices
#define CHUNK_OBJECT_FACES  0x4120 // The objects faces
#define CHUNK_OBJECT_MATERIAL 0x4130 // This is found if the object has a material, either texture map or color
#define CHUNK_OBJECT_UV   0x4140 // The UV texture coordinates

#include <pshpack1.h>

    struct TChunk
    {
      unsigned short int ID; // The chunk's ID
      unsigned int length; // The length of the chunk
      size_t bytesRead;  // The amount of bytes read within that chunk
    };

    struct TGeom
    {
      TIndexList Indicies;
      int materialID;  // Index in the CMesh material list
    };

    // This holds a face with its materialID
    struct TFace
    {
      uint vertIndex[3]; // 3 Sides of a triangle make a face.
      int materialID;  // Index in the CMesh material list
    };

#include <poppack.h>

    size_t GetString(char *);

    void ReadChunk(TChunk *);

    void ProcessNextChunk(CMesh *pMesh, TChunk *);

    void ProcessNextObjectChunk(CMesh *pMesh, char* strObjectName, TChunk *);

    void ProcessNextMaterialChunk(CMesh *pMesh, TChunk *);

    void ReadColorChunk(CMaterial *pMaterial, TChunk *pChunk);

    void ReadVertices(TChunk *);

    void ReadVertexIndices(TChunk *);

    void ReadUVCoordinates(TChunk *);

    void ReadObjectMaterial(CMesh *pMesh, TChunk *pPreviousChunk);

    void CleanUp();

    // These are used through the loading process to hold the chunk information
    TChunk *m_CurrentChunk;
    TChunk *m_TempChunk;

    FILE *m_FilePointer;

    std::vector<TFace> m_Faces;
    int m_nNumVerts;
    TVector3F  *m_pVertices;
    int m_nNumTexVertex;
    TVector2F  *m_pTexCoords;

    ushort m_nObjectWithMultMaterial;
  };
} // namespace Keos

#endif // KEOS_3DSLOADER_H

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