source: orxonox.OLD/orxonox/branches/old.john/src/3ds.h @ 3767

#ifndef _3DS_H
#define _3DS_H

//>------ Primary Chunk, at the beginning of each file
#define PRIMARY       0x4D4D

//>------ Main Chunks
#define OBJECTINFO    0x3D3D                            // This gives the version of the mesh and is found right before the material and object information
#define VERSION       0x0002                            // This gives the version of the .3ds file
#define EDITKEYFRAME  0xB000                            // This is the header for all of the key frame info

//>------ sub defines of OBJECTINFO
#define MATERIAL          0xAFFF                                // This stored the texture info
#define OBJECT            0x4000                                // This stores the faces, vertices, etc...

//>------ sub defines of MATERIAL
#define MATNAME       0xA000                            // This holds the material name
#define MATDIFFUSE    0xA020                            // This holds the color of the object/material
#define MATMAP        0xA200                            // This is a header for a new material
#define MATMAPFILE    0xA300                            // This holds the file name of the texture

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

//>------ sub defines of OBJECT_MESH
#define OBJECT_VERTICES     0x4110                      // The objects vertices
#define OBJECT_FACES            0x4120                  // The objects faces
#define OBJECT_MATERIAL         0x4130                  // This is found if the object has a material, either texture map or color
#define OBJECT_UV                       0x4140                  // The UV texture coordinates

#include "3dStructs.h"

// Here is our structure for our 3DS indicies (since .3DS stores 4 unsigned shorts)
struct tIndices {                                                       

        unsigned short a, b, c, bVisible;               // This will hold point1, 2, and 3 index's into the vertex array plus a visible flag
};

// This holds the chunk info
struct tChunk
{
        unsigned short int ID;                                  // The chunk's ID               
        unsigned int length;                                    // The length of the chunk
        unsigned int bytesRead;                                 // The amount of bytes read within that chunk
};

// This class handles all of the loading code
class CLoad3ds
{
public:
        CLoad3ds();                                                             // This inits the data members

        // This is the function that you call to load the 3DS
        bool Import3DS(C3dModel *pModel, char *strFileName);

private:
        // This reads in a string and saves it in the char array passed in
        int GetString(char *);

        // This reads the next chunk
        void ReadChunk(tChunk *);

        // This reads the next large chunk
        void ProcessNextChunk(C3dModel *pModel, tChunk *);

        // This reads the object chunks
        void ProcessNextObjectChunk(C3dModel *pModel, t3dObject *pObject, tChunk *);

        // This reads the material chunks
        void ProcessNextMaterialChunk(C3dModel *pModel, tChunk *);

        // This reads the RGB value for the object's color
        void ReadColorChunk(tMaterialInfo *pMaterial, tChunk *pChunk);

        // This reads the objects vertices
        void ReadVertices(t3dObject *pObject, tChunk *);

        // This reads the objects face information
        void ReadVertexIndices(t3dObject *pObject, tChunk *);

        // This reads the texture coodinates of the object
        void ReadUVCoordinates(t3dObject *pObject, tChunk *);

        // This reads in the material name assigned to the object and sets the materialID
        void ReadObjectMaterial(C3dModel *pModel, t3dObject *pObject, tChunk *pPreviousChunk);
        
        // This computes the vertex normals for the object (used for lighting)
        void ComputeNormals(C3dModel *pModel);

        // This frees memory and closes the file
        void CleanUp();
        
        // The file pointer
        FILE *m_FilePointer;
};


#endif


/////////////////////////////////////////////////////////////////////////////////
//
// * QUICK NOTES * 
// 
// This file is created in the hopes that you can just plug it into your code
// easily.  You will probably want to query more chunks though for animation, etc..
//
// 
// Ben Humphrey (DigiBen)
// Game Programmer
// DigiBen@GameTutorials.com
// Co-Web Host of www.GameTutorials.com
//
//