assimp/code/MDCFileData.h

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

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

Redistribution and use of this software in source and binary forms, 
with or without modification, are permitted provided that the 
following conditions are met:

* Redistributions of source code must retain the above
  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
  materials provided with the distribution.

* Neither the name of the ASSIMP team, nor the names of its
  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the ASSIMP Development Team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
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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"

#if defined(_MSC_VER) ||  defined(__BORLANDC__) ||	defined (__BCPLUSPLUS__)
#	pragma pack(push,1)
#	define PACK_STRUCT
#elif defined( __GNUC__ )
#	define PACK_STRUCT	__attribute__((packed))
#else
#	error Compiler not supported
#endif


namespace Assimp {
namespace MDC {

#define AI_MDC_MAGIC_NUMBER_BE	'CPDI'
#define AI_MDC_MAGIC_NUMBER_LE	'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;

// reset packing to the original value
#if defined(_MSC_VER) ||  defined(__BORLANDC__) || defined (__BCPLUSPLUS__)
#	pragma pack( pop )
#endif
#undef PACK_STRUCT


// ---------------------------------------------------------------------------
/** 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