/*

Open Asset Import Library (assimp)

----------------------------------------------------------------------

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  copyright notice, this list of conditions and the

  following disclaimer.

* Redistributions in binary form must reproduce the above

  copyright notice, this list of conditions and the

  following disclaimer in the documentation and/or other

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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 "endiannesses"

#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