assimp.assimp/code/MDCFileData.h

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

Copyright (c) 2006-2008, ASSIMP Development Team
All rights reserved.

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  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
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  following disclaimer in the documentation and/or other
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
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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 "../include/aiTypes.h"
#include "../include/aiMesh.h"
#include "../include/aiAnim.h"

#include "./../include/Compiler/pushpack1.h"


namespace Assimp {
namespace MDC {


// to make it easier for ourselfes, we test the magic word against both "endianesses"
#define MDC_MAKE(string) ((uint32_t)((string[0] << 24) + (string[1] << 16) + (string[2] << 8) + string[3]))

#define AI_MDC_MAGIC_NUMBER_BE	MDC_MAKE("CPDI")
#define AI_MDC_MAGIC_NUMBER_LE	MDC_MAKE("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 ;
} 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 "./../include/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