assimp/code/MDLFileData.h

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

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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
  copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other
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  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the ASSIMP Development Team.

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*/


/**
 * @file  MDLFileData.h
 * @brief Definition of in-memory structures for the MDL file format. 
 *
 * The specification has been taken from various sources on the internet.
 * - http://tfc.duke.free.fr/coding/mdl-specs-en.html
 * - Conitec's MED SDK
 * - Many quite long HEX-editor sessions
 */

#ifndef AI_MDLFILEHELPER_H_INC
#define AI_MDLFILEHELPER_H_INC

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

namespace Assimp	{
namespace MDL	{

// -------------------------------------------------------------------------------------
// to make it easier for us, we test the magic word against both "endianesses"

// magic bytes used in Quake 1 MDL meshes
#define AI_MDL_MAGIC_NUMBER_BE	AI_MAKE_MAGIC("IDPO")
#define AI_MDL_MAGIC_NUMBER_LE	AI_MAKE_MAGIC("OPDI")

// magic bytes used in GameStudio A<very  low> MDL meshes
#define AI_MDL_MAGIC_NUMBER_BE_GS3	AI_MAKE_MAGIC("MDL2")
#define AI_MDL_MAGIC_NUMBER_LE_GS3	AI_MAKE_MAGIC("2LDM")

// magic bytes used in GameStudio A4 MDL meshes
#define AI_MDL_MAGIC_NUMBER_BE_GS4	AI_MAKE_MAGIC("MDL3")
#define AI_MDL_MAGIC_NUMBER_LE_GS4	AI_MAKE_MAGIC("3LDM")

// magic bytes used in GameStudio A5+ MDL meshes
#define AI_MDL_MAGIC_NUMBER_BE_GS5a	AI_MAKE_MAGIC("MDL4")
#define AI_MDL_MAGIC_NUMBER_LE_GS5a	AI_MAKE_MAGIC("4LDM")
#define AI_MDL_MAGIC_NUMBER_BE_GS5b	AI_MAKE_MAGIC("MDL5")
#define AI_MDL_MAGIC_NUMBER_LE_GS5b	AI_MAKE_MAGIC("5LDM")

// magic bytes used in GameStudio A7+ MDL meshes
#define AI_MDL_MAGIC_NUMBER_BE_GS7	AI_MAKE_MAGIC("MDL7")
#define AI_MDL_MAGIC_NUMBER_LE_GS7	AI_MAKE_MAGIC("7LDM")


// common limitations for Quake1 meshes. The loader does not check them,
// (however it warns) but models should not exceed these limits.
#if (!defined AI_MDL_VERSION)
#	define AI_MDL_VERSION				6
#endif
#if (!defined AI_MDL_MAX_FRAMES)
#	define AI_MDL_MAX_FRAMES			256
#endif
#if (!defined AI_MDL_MAX_UVS)
#	define AI_MDL_MAX_UVS				1024	
#endif
#if (!defined AI_MDL_MAX_VERTS)
#	define AI_MDL_MAX_VERTS				1024
#endif
#if (!defined AI_MDL_MAX_TRIANGLES)
#	define AI_MDL_MAX_TRIANGLES			2048	
#endif

// material key that is set for dummy materials that are
// just referencing another material
#if (!defined AI_MDL7_REFERRER_MATERIAL)
#	define AI_MDL7_REFERRER_MATERIAL "&&&referrer&&&",0,0
#endif

// -------------------------------------------------------------------------------------
/** \struct Header
 *  \brief Data structure for the MDL main header
 */
struct Header
{
	//! magic number: "IDPO"
	uint32_t ident;          

	//! version number: 6
	int32_t version;          

	//! scale factors for each axis
	aiVector3D scale;				

	//! translation factors for each axis
	aiVector3D translate;	

	//! bounding radius of the mesh
	float boundingradius;
	 
	//! Position of the viewer's exe. Ignored
	aiVector3D vEyePos;

	//! Number of textures
	int32_t num_skins;       

	//! Texture width in pixels
	int32_t skinwidth;

	//! Texture height in pixels
	int32_t skinheight;       

	//! Number of vertices contained in the file
	int32_t num_verts;       

	//! Number of triangles contained in the file
	int32_t num_tris;         

	//! Number of frames contained in the file
	int32_t num_frames;      

	//! 0 = synchron, 1 = random . Ignored
	//! (MDLn formats: number of texture coordinates)
	int32_t synctype;         

	//! State flag
	int32_t flags;     

	//! Could be the total size of the file (and not a float)
	float size;
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
/** \struct Header_MDL7
 *  \brief Data structure for the MDL 7 main header
 */
struct Header_MDL7
{
	//! magic number: "MDL7"
	char	ident[4];		

	//! Version number. Ignored
	int32_t	version;		

	//! Number of bones in file
	uint32_t	bones_num;

	//! Number of groups in file
	uint32_t	groups_num;

	//! Size of data in the file
	uint32_t	data_size;	

	//! Ignored. Used to store entity specific information
	int32_t	entlump_size;	

	//! Ignored. Used to store MED related data
	int32_t	medlump_size;	

	//! Size of the Bone_MDL7 data structure used in the file
	uint16_t bone_stc_size;

	//! Size of the Skin_MDL 7 data structure used in the file
	uint16_t skin_stc_size;

	//! Size of a single color (e.g. in a material)
	uint16_t colorvalue_stc_size;

	//! Size of the Material_MDL7 data structure used in the file
	uint16_t material_stc_size;

	//! Size of a texture coordinate set in the file
	uint16_t skinpoint_stc_size;

	//! Size of a triangle in the file
	uint16_t triangle_stc_size;

	//! Size of a normal vertex in the file
	uint16_t mainvertex_stc_size;

	//! Size of a per-frame animated vertex in the file
	//! (this is not supported)
	uint16_t framevertex_stc_size;

	//! Size of a bone animation matrix
	uint16_t bonetrans_stc_size;

	//! Size of the Frame_MDL7 data structure used in the file
	uint16_t frame_stc_size;
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
/** \struct Bone_MDL7
 *  \brief Data structure for a bone in a MDL7 file
 */
struct Bone_MDL7
{
	//! Index of the parent bone of *this* bone. 0xffff means:
	//! "hey, I have no parent, I'm an orphan"
	uint16_t parent_index;
	uint8_t _unused_[2]; 

	//! Relative position of the bone (relative to the
	//! parent bone)
	float x,y,z;

	//! Optional name of the bone
	char name[1 /* DUMMY SIZE */];
} PACK_STRUCT;

#if (!defined AI_MDL7_BONE_STRUCT_SIZE__NAME_IS_20_CHARS)
#	define AI_MDL7_BONE_STRUCT_SIZE__NAME_IS_20_CHARS (16 + 20)
#endif

#if (!defined AI_MDL7_BONE_STRUCT_SIZE__NAME_IS_32_CHARS)
#	define AI_MDL7_BONE_STRUCT_SIZE__NAME_IS_32_CHARS (16 + 32)
#endif

#if (!defined AI_MDL7_BONE_STRUCT_SIZE__NAME_IS_NOT_THERE)
#	define AI_MDL7_BONE_STRUCT_SIZE__NAME_IS_NOT_THERE (16)
#endif

#if (!defined AI_MDL7_MAX_GROUPNAMESIZE)
#	define AI_MDL7_MAX_GROUPNAMESIZE	16
#endif // ! AI_MDL7_MAX_GROUPNAMESIZE

// -------------------------------------------------------------------------------------
/** \struct Group_MDL7
 *  \brief Group in a MDL7 file
 */
struct Group_MDL7
{
	//! = '1' -> triangle based Mesh
	unsigned char	typ;		

	int8_t	deformers;
	int8_t	max_weights;
	int8_t	_unused_;

	//! size of data for this group in bytes ( MD7_GROUP stc. included).
	int32_t	groupdata_size; 
	char	name[AI_MDL7_MAX_GROUPNAMESIZE];

	//! Number of skins
	int32_t	numskins;

	//! Number of texture coordinates
	int32_t	num_stpts;	

	//! Number of triangles
	int32_t	numtris;

	//! Number of vertices
	int32_t	numverts;

	//! Number of frames
	int32_t	numframes;
} PACK_STRUCT;

#define	AI_MDL7_SKINTYPE_MIPFLAG				0x08
#define	AI_MDL7_SKINTYPE_MATERIAL				0x10
#define	AI_MDL7_SKINTYPE_MATERIAL_ASCDEF		0x20
#define	AI_MDL7_SKINTYPE_RGBFLAG				0x80

#if (!defined AI_MDL7_MAX_BONENAMESIZE)
#	define AI_MDL7_MAX_BONENAMESIZE 20
#endif // !! AI_MDL7_MAX_BONENAMESIZE

// -------------------------------------------------------------------------------------
/** \struct Deformer_MDL7
 *  \brief Deformer in a MDL7 file
 */
struct Deformer_MDL7
{
	int8_t	deformer_version;		// 0
	int8_t	deformer_typ;			// 0 - bones
	int8_t	_unused_[2];
	int32_t	group_index;
	int32_t	elements;
	int32_t	deformerdata_size;
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
/** \struct DeformerElement_MDL7
 *  \brief Deformer element in a MDL7 file
 */
struct DeformerElement_MDL7
{
	//! bei deformer_typ==0 (==bones) element_index == bone index
	int32_t	element_index;		
	char	element_name[AI_MDL7_MAX_BONENAMESIZE];
	int32_t	weights;
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
/** \struct DeformerWeight_MDL7
 *  \brief Deformer weight in a MDL7 file
 */
struct DeformerWeight_MDL7
{
	//! for deformer_typ==0 (==bones) index == vertex index
	int32_t	index;				
	float	weight;
} PACK_STRUCT;


// don't know why this was in the original headers ...
typedef int32_t MD7_MATERIAL_ASCDEFSIZE;

// -------------------------------------------------------------------------------------
/** \struct ColorValue_MDL7
 *  \brief Data structure for a color value in a MDL7 file
 */
struct ColorValue_MDL7
{
	float r,g,b,a;
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct Material_MDL7
 *  \brief Data structure for a Material in a MDL7 file
 */
struct Material_MDL7
{
	//! Diffuse base color of the material
	ColorValue_MDL7	Diffuse;        

	//! Ambient base color of the material
    ColorValue_MDL7	Ambient;  

	//! Specular base color of the material
    ColorValue_MDL7	Specular;  

	//! Emissive base color of the material
    ColorValue_MDL7	Emissive; 

	//! Phong power
    float			Power;         
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
/** \struct Skin
 *  \brief Skin data structure #1 - used by Quake1, MDL2, MDL3 and MDL4
 */
struct Skin
{
	//! 0 = single (Skin), 1 = group (GroupSkin)
	//! For MDL3-5: Defines the type of the skin and there
	//! fore the size of the data to skip:
	//-------------------------------------------------------
	//! 2 for 565 RGB,
	//! 3 for 4444 ARGB, 
	//! 10 for 565 mipmapped, 
	//! 11 for 4444 mipmapped (bpp = 2),
	//! 12 for 888 RGB mipmapped (bpp = 3), 
	//! 13 for 8888 ARGB mipmapped (bpp = 4)
	//-------------------------------------------------------
	int32_t group;      

	//! Texture data
	uint8_t *data;  
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
/** \struct Skin
 *  \brief Skin data structure #2 - used by MDL5, MDL6 and MDL7
 *  \see Skin
 */
struct Skin_MDL5
{
	int32_t size, width, height;      
	uint8_t *data;  
} PACK_STRUCT;

// maximum length of texture file name
#if (!defined AI_MDL7_MAX_TEXNAMESIZE)
#	define AI_MDL7_MAX_TEXNAMESIZE		0x10
#endif

// ---------------------------------------------------------------------------
/** \struct Skin_MDL7
 *  \brief Skin data structure #3 - used by MDL7 and HMP7
 */
struct Skin_MDL7
{
	uint8_t			typ;
	int8_t			_unused_[3];
	int32_t			width;
	int32_t			height;
	char			texture_name[AI_MDL7_MAX_TEXNAMESIZE];	
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct RGB565
 *  \brief Data structure for a RGB565 pixel in a texture
 */
struct RGB565
{
	uint16_t r : 5;
	uint16_t g : 6;
	uint16_t b : 5;
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct ARGB4
 *  \brief Data structure for a ARGB4444 pixel in a texture
 */
struct ARGB4
{
	uint16_t a : 4;
	uint16_t r : 4;
	uint16_t g : 4;
	uint16_t b : 4;
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct GroupSkin
 *  \brief Skin data structure #2 (group of pictures)
 */
struct GroupSkin
{
	//! 0 = single (Skin), 1 = group (GroupSkin)
    int32_t group;     

	//! Number of images
	int32_t nb;       

	//! Time for each image
    float *time;   

	//! Data of each image
	uint8_t **data;  
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct TexCoord
 *  \brief Texture coordinate data structure used by the Quake1 MDL format
 */
struct TexCoord
{
	//! Is the vertex on the noundary between front and back piece?
	int32_t onseam;

	//! Texture coordinate in the tx direction
	int32_t s;

	//! Texture coordinate in the ty direction
	int32_t t;
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct TexCoord_MDL3
 *  \brief Data structure for an UV coordinate in the 3DGS MDL3 format
 */
struct TexCoord_MDL3
{
	//! position, horizontally in range 0..skinwidth-1
	int16_t u; 

	//! position, vertically in range 0..skinheight-1
	int16_t v; 
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct TexCoord_MDL7
 *  \brief Data structure for an UV coordinate in the 3DGS MDL7 format
 */
struct TexCoord_MDL7
{
	//! position, horizontally in range 0..1
	float u; 

	//! position, vertically in range 0..1
	float v; 
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct SkinSet_MDL7
 *  \brief Skin set data structure for the 3DGS MDL7 format
 * MDL7 references UV coordinates per face via an index list.
 * This allows the use of multiple skins per face with just one
 * UV coordinate set.
 */
struct SkinSet_MDL7
{
	//! Index into the UV coordinate list
	uint16_t	st_index[3]; // size 6	

	//! Material index
	int32_t		material;	 // size 4				
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct Triangle
 *  \brief Triangle data structure for the Quake1 MDL format
 */
struct Triangle
{
	//! 0 = backface, 1 = frontface
	int32_t facesfront;  

	//! Vertex indices
	int32_t vertex[3];   
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct Triangle_MDL3
 *  \brief Triangle data structure for the 3DGS MDL3 format
 */
struct Triangle_MDL3
{
	//!  Index of 3 3D vertices in range 0..numverts
	uint16_t index_xyz[3];

	//! Index of 3 skin vertices in range 0..numskinverts
	uint16_t index_uv[3]; 
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct Triangle_MDL7
 *  \brief Triangle data structure for the 3DGS MDL7 format
 */
struct Triangle_MDL7
{
	//! Vertex indices
	uint16_t   v_index[3]; 	// size 6

	//! Two skinsets. The second will be used for multi-texturing
	SkinSet_MDL7  skinsets[2];
} PACK_STRUCT; 

#if (!defined AI_MDL7_TRIANGLE_STD_SIZE_ONE_UV)
#	define AI_MDL7_TRIANGLE_STD_SIZE_ONE_UV (6+sizeof(SkinSet_MDL7)-sizeof(uint32_t))
#endif 
#if (!defined AI_MDL7_TRIANGLE_STD_SIZE_ONE_UV_WITH_MATINDEX)
#	define AI_MDL7_TRIANGLE_STD_SIZE_ONE_UV_WITH_MATINDEX (6+sizeof(SkinSet_MDL7))
#endif 
#if (!defined AI_MDL7_TRIANGLE_STD_SIZE_TWO_UV)
#	define AI_MDL7_TRIANGLE_STD_SIZE_TWO_UV (6+2*sizeof(SkinSet_MDL7))
#endif 

// Helper constants for Triangle::facesfront
#if (!defined AI_MDL_BACKFACE)
#	define AI_MDL_BACKFACE			0x0
#endif
#if (!defined  AI_MDL_FRONTFACE)
#	define AI_MDL_FRONTFACE			0x1
#endif

// -------------------------------------------------------------------------------------
/** \struct Vertex
 *  \brief Vertex data structure
 */
struct Vertex
{
	uint8_t v[3];
	uint8_t normalIndex;
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
struct Vertex_MDL4
{
	uint16_t v[3];
	uint8_t normalIndex;
	uint8_t unused;
} PACK_STRUCT;

#define AI_MDL7_FRAMEVERTEX120503_STCSIZE		16
#define AI_MDL7_FRAMEVERTEX030305_STCSIZE		26

// -------------------------------------------------------------------------------------
/** \struct Vertex_MDL7
 *  \brief Vertex data structure used in MDL7 files
 */
struct Vertex_MDL7
{
	float	x,y,z;
	uint16_t vertindex;	// = bone index
	union {
		uint8_t norm162index;
		float norm[3];
	};
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
/** \struct BoneTransform_MDL7
 *  \brief bone transformation matrix structure used in MDL7 files
 */
struct BoneTransform_MDL7
{
	//! 4*3
	float	m [4*4];				

	//! the index of this vertex, 0.. header::bones_num - 1
	uint16_t bone_index;		

	//! I HATE 3DGS AND THE SILLY DEVELOPER WHO DESIGNED
	//! THIS STUPID FILE FORMAT!
	int8_t _unused_[2];
} PACK_STRUCT;


#define AI_MDL7_MAX_FRAMENAMESIZE		16


// -------------------------------------------------------------------------------------
/** \struct Frame_MDL7
 *  \brief Frame data structure used by MDL7 files
 */
struct Frame_MDL7
{
	char	frame_name[AI_MDL7_MAX_FRAMENAMESIZE];
	uint32_t	vertices_count;			
	uint32_t	transmatrix_count;		
};


// -------------------------------------------------------------------------------------
/** \struct SimpleFrame
 *  \brief Data structure for a simple frame
 */
struct SimpleFrame
{
	//! Minimum vertex of the bounding box
	Vertex bboxmin; 

	//! Maximum vertex of the bounding box
	Vertex bboxmax; 

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

	//! Vertex list of the frame
	Vertex *verts; 
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct Frame
 *  \brief Model frame data structure
 */
struct Frame
{
	//! 0 = simple frame, !0 = group frame
	int32_t type;       

	//! Frame data
	SimpleFrame frame;  	      
} PACK_STRUCT;


// -------------------------------------------------------------------------------------
struct SimpleFrame_MDLn_SP
{
	//! Minimum vertex of the bounding box
	Vertex_MDL4 bboxmin; 

	//! Maximum vertex of the bounding box
	Vertex_MDL4 bboxmax; 

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

	//! Vertex list of the frame
	Vertex_MDL4 *verts; 
} PACK_STRUCT;

// -------------------------------------------------------------------------------------
/** \struct GroupFrame
 *  \brief Data structure for a group of frames
 */
struct GroupFrame
{
	//! 0 = simple frame, !0 = group frame
	int32_t type;                         

	//! Minimum vertex for all single frames
	Vertex min;         

	//! Maximum vertex for all single frames
	Vertex max;         

	//! Time for all single frames
	float *time;                  

	//! List of single frames
	SimpleFrame *frames; 
} PACK_STRUCT;

#include "./../include/Compiler/poppack1.h"

// -------------------------------------------------------------------------------------
/** \struct IntFace_MDL7
 *  \brief Internal data structure to temporarily represent a face
 */
struct IntFace_MDL7
{
	// provide a constructor for our own convenience
	IntFace_MDL7()
	{
		// set everything to zero
		mIndices[0] = mIndices[1] = mIndices[2] = 0;
		iMatIndex[0] = iMatIndex[1] = 0;
	}

	//! Vertex indices
	uint32_t mIndices[3];

	//! Material index (maximally two channels, which are joined later)
	unsigned int iMatIndex[2];
}; 

// -------------------------------------------------------------------------------------
/** \struct IntMaterial_MDL7
 *  \brief Internal data structure to temporarily represent a material
 *  which has been created from two single materials along with the
 *  original material indices.
 */
struct IntMaterial_MDL7
{
	// provide a constructor for our own convenience
	IntMaterial_MDL7()
	{
		pcMat = NULL;
		iOldMatIndices[0] = iOldMatIndices[1] = 0;
	}

	//! Material instance
	MaterialHelper* pcMat;

	//! Old material indices
	unsigned int iOldMatIndices[2];
};

// -------------------------------------------------------------------------------------
/** \struct IntBone_MDL7
 *  \brief Internal data structure to represent a bone in a MDL7 file with
 *  all of its animation channels assigned to it.
 */
struct IntBone_MDL7 : aiBone
{
	//! Default constructor
	IntBone_MDL7() : iParent (0xffff)
	{
		pkeyPositions.reserve(30);
		pkeyScalings.reserve(30);
		pkeyRotations.reserve(30);
	}

	//! Parent bone of the bone
	uint64_t iParent;

	//! Relative position of the bone
	aiVector3D vPosition;

	//! Array of position keys
	std::vector<aiVectorKey> pkeyPositions;

	//! Array of scaling keys
	std::vector<aiVectorKey> pkeyScalings;

	//! Array of rotation keys
	std::vector<aiQuatKey> pkeyRotations;
};

// -------------------------------------------------------------------------------------
//! Describes a MDL7 frame
struct IntFrameInfo_MDL7
{
	//! Construction from an existing frame header
	IntFrameInfo_MDL7(BE_NCONST MDL::Frame_MDL7* _pcFrame,unsigned int _iIndex) 
		: iIndex(_iIndex)
		, pcFrame(_pcFrame)
	{}

	//! Index of the frame
	unsigned int iIndex;

	//! Points to the header of the frame
	BE_NCONST MDL::Frame_MDL7*	pcFrame; 
};

// -------------------------------------------------------------------------------------
//! Describes a MDL7 mesh group
struct IntGroupInfo_MDL7
{
	//! Default constructor
	IntGroupInfo_MDL7()		
		:	iIndex(0)
		,	pcGroup(NULL)
		,	pcGroupUVs(NULL)
		,	pcGroupTris(NULL)
		,	pcGroupVerts(NULL)
		{}

	//! Construction from an existing group header
	IntGroupInfo_MDL7(BE_NCONST MDL::Group_MDL7* _pcGroup, unsigned int _iIndex)
		:	iIndex(_iIndex)
		,	pcGroup(_pcGroup)
	{}

	//! Index of the group
	unsigned int iIndex;

	//! Points to the header of the group
	BE_NCONST MDL::Group_MDL7*		pcGroup; 

	//! Points to the beginning of the uv coordinate section
	BE_NCONST MDL::TexCoord_MDL7*	pcGroupUVs;		

	//! Points to the beginning of the triangle section
	BE_NCONST MDL::Triangle_MDL7*	pcGroupTris;		

	//! Points to the beginning of the vertex section
	BE_NCONST MDL::Vertex_MDL7*		pcGroupVerts;
};

// -------------------------------------------------------------------------------------
//! Holds the data that belongs to a MDL7 mesh group
struct IntGroupData_MDL7
{
	IntGroupData_MDL7()
		: pcFaces(NULL), bNeed2UV(false)
	{}

	//! Array of faces that belong to the group
	MDL::IntFace_MDL7* pcFaces;		

	//! Array of vertex positions
	std::vector<aiVector3D>		vPositions;			

	//! Array of vertex normals
	std::vector<aiVector3D>		vNormals;	

	//! Array of bones indices
	std::vector<unsigned int>	aiBones;	

	//! First UV coordinate set
	std::vector<aiVector3D>		vTextureCoords1;

	//! Optional second UV coordinate set
	std::vector<aiVector3D>		vTextureCoords2;

	//! Specifies whether there are two texture
	//! coordinate sets required
	bool bNeed2UV;
};

// -------------------------------------------------------------------------------------
//! Holds data from an MDL7 file that is shared by all mesh groups
struct IntSharedData_MDL7
{
	//! Default constructor
	IntSharedData_MDL7() 
	{
		abNeedMaterials.reserve(10);
	}

	//! Destruction: properly delete all allocated resources
	~IntSharedData_MDL7()
	{
		// kill all bones
		if (this->apcOutBones)
		{
			for (unsigned int m = 0; m < iNum;++m)
				delete this->apcOutBones[m];
			delete[] this->apcOutBones;
		}
	}

	//! Specifies which materials are used
	std::vector<bool> abNeedMaterials;

	//! List of all materials
	std::vector<MaterialHelper*> pcMats;

	//! List of all bones
	IntBone_MDL7** apcOutBones;

	//! number of bones
	unsigned int iNum;
};

// -------------------------------------------------------------------------------------
//! Contains input data for GenerateOutputMeshes_3DGS_MDL7
struct IntSplittedGroupData_MDL7
{
	//! Construction from a given shared data set 
	IntSplittedGroupData_MDL7(IntSharedData_MDL7& _shared,
		std::vector<aiMesh*>& _avOutList)

		: shared(_shared), avOutList(_avOutList)
	{
	}

	//! Destruction: properly delete all allocated resources
	~IntSplittedGroupData_MDL7()
	{
		// kill all face lists
		if(this->aiSplit)
		{
			for (unsigned int m = 0; m < shared.pcMats.size();++m)
				delete this->aiSplit[m];
			delete[] this->aiSplit;
		}
	}

	//! Contains a list of all faces per material
	std::vector<unsigned int>** aiSplit;

	//! Shared data for all groups of the model
	IntSharedData_MDL7& shared;

	//! List of meshes 
	std::vector<aiMesh*>& avOutList;
};


}
} // end namespaces

#endif // !! AI_MDLFILEHELPER_H_INC