assimp/code/AssetLib/MDC/MDCFileData.h

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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*/

/** @file Defines the helper data structures for importing MDC files

**********************************************************************
File format specification:
http://themdcfile.planetwolfenstein.gamespy.com/MDC_File_Format.pdf
**********************************************************************

*/
#ifndef AI_MDCFILEHELPER_H_INC
#define AI_MDCFILEHELPER_H_INC

#include <assimp/types.h>
#include <assimp/mesh.h>
#include <assimp/anim.h>

#include <assimp/Compiler/pushpack1.h>
#include <stdint.h>

namespace Assimp {
namespace MDC {

// to make it easier for us, we test the magic word against both "endianesses"
#define AI_MDC_MAGIC_NUMBER_BE  AI_MAKE_MAGIC("CPDI")
#define AI_MDC_MAGIC_NUMBER_LE  AI_MAKE_MAGIC("IDPC")

// common limitations
#define AI_MDC_VERSION          2
#define AI_MDC_MAXQPATH         64
#define AI_MDC_MAX_BONES        128

#define AI_MDC_CVERT_BIAS       127.0f
#define AI_MDC_DELTA_SCALING    4.0f
#define AI_MDC_BASE_SCALING     (1.0f / 64.0f)


// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC file's main header
 */
struct Header {
    uint32_t ulIdent ;
    uint32_t ulVersion ;
    char ucName [ AI_MDC_MAXQPATH ] ;
    uint32_t ulFlags ;
    uint32_t ulNumFrames ;
    uint32_t ulNumTags ;
    uint32_t ulNumSurfaces ;
    uint32_t ulNumSkins ;
    uint32_t ulOffsetBorderFrames ;
    uint32_t ulOffsetTagNames ;
    uint32_t ulOffsetTagFrames ;
    uint32_t ulOffsetSurfaces ;
    uint32_t ulOffsetEnd ;
} PACK_STRUCT ;


// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC file's surface header
 */
struct Surface {
    uint32_t ulIdent ;
    char ucName [ AI_MDC_MAXQPATH ] ;
    uint32_t ulFlags ;
    uint32_t ulNumCompFrames ;
    uint32_t ulNumBaseFrames ;
    uint32_t ulNumShaders ;
    uint32_t ulNumVertices ;
    uint32_t ulNumTriangles ;
    uint32_t ulOffsetTriangles ;
    uint32_t ulOffsetShaders ;
    uint32_t ulOffsetTexCoords ;
    uint32_t ulOffsetBaseVerts ;
    uint32_t ulOffsetCompVerts ;
    uint32_t ulOffsetFrameBaseFrames ;
    uint32_t ulOffsetFrameCompFrames ;
    uint32_t ulOffsetEnd;
    Surface() AI_NO_EXCEPT
    : ulIdent()
    , ulFlags()
    , ulNumCompFrames()
    , ulNumBaseFrames()
    , ulNumShaders()
    , ulNumVertices()
    , ulNumTriangles()
    , ulOffsetTriangles()
    , ulOffsetShaders()
    , ulOffsetTexCoords()
    , ulOffsetBaseVerts()
    , ulOffsetCompVerts()
    , ulOffsetFrameBaseFrames()
    , ulOffsetFrameCompFrames()
    , ulOffsetEnd() {
        ucName[AI_MDC_MAXQPATH-1] = '\0';
    }
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC frame
 */
struct Frame {
    //! bounding box minimum coords
    aiVector3D bboxMin ;

    //! bounding box maximum coords
    aiVector3D bboxMax ;

    //! local origin of the frame
    aiVector3D localOrigin ;

    //! radius of the BB
    float radius ;

    //! Name of the frame
    char name [ 16 ] ;
} /*PACK_STRUCT*/;

// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC triangle
 */
struct Triangle {
    uint32_t aiIndices[3];
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC texture coordinate
 */
struct TexturCoord {
    float u,v;
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC base vertex
 */
struct BaseVertex {
    int16_t x,y,z;
    uint16_t normal;
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC compressed vertex
 */
struct CompressedVertex {
    uint8_t xd,yd,zd,nd;
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** \brief Data structure for a MDC shader
 */
struct Shader {
    char ucName [ AI_MDC_MAXQPATH ] ;
    uint32_t ulPath;
} PACK_STRUCT;

#include <assimp/Compiler/poppack1.h>

// ---------------------------------------------------------------------------
/** Build a floating point vertex from the compressed data in MDC files
 */
void BuildVertex(const Frame& frame,
    const BaseVertex& bvert,
    const CompressedVertex& cvert,
    aiVector3D& vXYZOut,
    aiVector3D& vNorOut);
}
}

#endif // !! AI_MDCFILEHELPER_H_INC