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3dsloader.hh

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#ifndef _tdsloader_hh
#define _tdsloader_hh

#include "tdstypes.hh"

//>------ 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


// 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(t3DModel *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(t3DModel *pModel, tChunk *);

        // This reads the object chunks
        void processNextObjectChunk(t3DModel *pModel, t3DObject *pObject, tChunk *);

        // This reads the material chunks
        void processNextMaterialChunk(t3DModel *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(t3DModel *pModel, t3DObject *pObject, tChunk *pPreviousChunk);
        
        // This computes the vertex normals for the object (used for lighting)
        void computeNormals(t3DModel *pModel);

        // This frees memory and closes the file
        void cleanUp();
        
        // The file pointer
        FILE *m_FilePointer;
        
        // These are used through the loading process to hold the chunk information
        tChunk *m_CurrentChunk;
        tChunk *m_TempChunk;
};

#endif

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Anoid NG © Michael Westergaard, Martin Stig Stissing, Ronni Michael Laursen, and Kristian Bisgaard Lassen