/***
*
*	Copyright (c) 1998, Valve LLC. All rights reserved.
*	
*	This product contains software technology licensed from Id 
*	Software, Inc. ("Id Technology").  Id Technology (c) 1996 Id Software, Inc. 
*	All Rights Reserved.
*
****/

#include <stdio.h>
#include "basetypes.h"
#include "utlvector.h"
#include "utlsymbol.h"
#include "mathlib/vector.h"
#include "studio.h"

struct LodScriptData_t;

#define IDSTUDIOHEADER			(('T'<<24)+('S'<<16)+('D'<<8)+'I')
														// little-endian "IDST"
#define IDSTUDIOANIMGROUPHEADER	(('G'<<24)+('A'<<16)+('D'<<8)+'I')
														// little-endian "IDAG"


#define STUDIO_QUADRATIC_MOTION 0x00002000

#define MAXSTUDIOANIMFRAMES		2000	// max frames per animation
#define MAXSTUDIOSEQUENCES		1524	// total sequences
#define MAXSTUDIOSRCBONES		512		// bones allowed at source movement
#define MAXSTUDIOBONEWEIGHTS	3
#define MAXSTUDIONAME			128

#ifndef EXTERN
#define EXTERN extern
#endif

EXTERN	char		outname[1024];
EXTERN  int			numdirs;
EXTERN	char		cddir[32][MAX_PATH];
EXTERN  char		fullpath[1024];

EXTERN	float		g_defaultscale;
EXTERN  float		g_currentscale;
EXTERN  RadianEuler	g_defaultrotation;


EXTERN	char		defaulttexture[16][MAX_PATH];
EXTERN	char		sourcetexture[16][MAX_PATH];

EXTERN	int			numrep;

EXTERN	int			flip_triangles;
EXTERN	float		normal_blend;


void *kalloc( int num, int size );

struct s_trianglevert_t
{
	int					vertindex;
	int					normindex;		// index into normal array
	int					s,t;
	float				u,v;
};

struct s_boneweight_t
{
	int		numbones;

	int		bone[MAXSTUDIOBONEWEIGHTS];
	float	weight[MAXSTUDIOBONEWEIGHTS];
};


struct s_vertexinfo_t
{
	// wtf is this doing here?
	int		material;

	int		firstref;
	int		lastref;

	int		flexmask;
	int		numflex;
	int		flexoffset;
};

struct s_tmpface_t
{
	int	material;
	unsigned long		a, b, c;
	unsigned long		ta, tb, tc;
	unsigned long		na, nb, nc;
};

struct s_face_t
{
	unsigned long		a, b, c;
};

struct s_node_t
{
	char			name[MAXSTUDIONAME];
	int				parent;
};


struct s_bone_t
{
	Vector			pos;
	RadianEuler		rot;
};

struct s_texture_t
{
	char	name[MAX_PATH];
	int		flags;
	int		parent;
	int		material;
	float	width;
	float	height;
	float	dPdu;
	float	dPdv;
};
EXTERN	s_texture_t g_texture[MAXSTUDIOSKINS];
EXTERN	int g_numtextures;
EXTERN	int	g_material[MAXSTUDIOSKINS]; // link into texture array
EXTERN  int g_nummaterials;

EXTERN  float g_gamma;
EXTERN	int g_numskinref;
EXTERN  int g_numskinfamilies;
EXTERN  int g_skinref[256][MAXSTUDIOSKINS]; // [skin][skinref], returns texture index
EXTERN	int g_numtexturegroups;
EXTERN	int g_numtexturelayers[32];
EXTERN	int g_numtexturereps[32];
EXTERN  int g_texturegroup[32][32][32];

struct s_mesh_t
{
	int numvertices;
	int	vertexoffset;

	int numfaces;
	int	faceoffset;
};


struct s_vertanim_t
{
	int		vertex;
	float	speed;
	float	side;
	Vector	pos;
	Vector	normal;
};

// processed aggregate lod pools
struct s_loddata_t
{
	int				numvertices;
	s_boneweight_t	*globalBoneweight;
	s_vertexinfo_t	*vertexInfo;
	Vector			*vertex;	
	Vector			*normal;
	Vector4D		*tangentS;
	Vector2D		*texcoord;

	int				numfaces;
	s_face_t		*face;

	s_mesh_t		mesh[MAXSTUDIOSKINS];

	// remaps verts from an lod's source mesh to this all-lod processed aggregate pool
	int				*pMeshVertIndexMaps[MAX_NUM_LODS];
};

// raw off-disk source files.  Raw data should be not processed.
struct s_source_t
{
	char	filename[MAX_PATH];
	int 	time;	// time stamp

	bool	isActiveModel;

	// local skeleton hierarchy
	int numbones;
	s_node_t localBone[MAXSTUDIOSRCBONES];
	matrix3x4_t boneToPose[MAXSTUDIOSRCBONES];	// converts bone local data into initial pose data

	// bone remapping
	int boneflags[MAXSTUDIOSRCBONES];	// attachment, vertex, etc flags for this bone
	int boneref[MAXSTUDIOSRCBONES];		// flags for this and child bones
	int	boneLocalToGlobal[MAXSTUDIOSRCBONES]; // bonemap : local bone to world bone mapping
	int	boneGlobalToLocal[MAXSTUDIOSRCBONES]; // boneimap : world bone to local bone mapping

	int	texmap[MAXSTUDIOSKINS*4];		// map local MAX materials to unique textures

	// per material mesh
	int				nummeshes;
	int				meshindex[MAXSTUDIOSKINS];	// mesh to skin index
	s_mesh_t		mesh[MAXSTUDIOSKINS];

	// model global copy of vertices
	int				numvertices;
	s_boneweight_t	*localBoneweight;	// vertex info about local bone weighting
	s_boneweight_t	*globalBoneweight;	// vertex info about global bone weighting
	s_vertexinfo_t	*vertexInfo;		// generic vertex info
	Vector			*vertex;	
	Vector			*normal;
	Vector4D		*tangentS;
	Vector2D		*texcoord;

	int numfaces;
	s_face_t *face;						// vertex indexs per face

	// raw skeletal animation	
	int numframes;
	int startframe;
	int endframe;
	s_bone_t		*rawanim[MAXSTUDIOANIMFRAMES]; // [frame][bones];

	// vertex animation
	int				*vanim_mapcount;	// local verts map to N target verts
	int				**vanim_map;		// local vertices to target vertices mapping list
	int				*vanim_flag;		// local vert does animate

	int				numvanims[MAXSTUDIOANIMFRAMES];
	s_vertanim_t	*vanim[MAXSTUDIOANIMFRAMES];	// [frame][vertex]

	// processed aggregate lod data
	s_loddata_t		*pLodData;
};


EXTERN int g_numsources;
EXTERN s_source_t *g_source[MAXSTUDIOSEQUENCES];

EXTERN	int is_v1support;

#define strcpyn( a, b ) strncpy( a, b, sizeof( a ) )

EXTERN	int g_numverts;
EXTERN	Vector g_vertex[MAXSTUDIOVERTS];
EXTERN	s_boneweight_t g_bone[MAXSTUDIOVERTS];

EXTERN	int g_numnormals;
EXTERN	Vector g_normal[MAXSTUDIOVERTS];

EXTERN	int g_numtexcoords;
EXTERN	Vector2D g_texcoord[MAXSTUDIOVERTS];

EXTERN	int g_numfaces;
EXTERN	s_tmpface_t g_face[MAXSTUDIOTRIANGLES];
EXTERN	s_face_t g_src_uface[MAXSTUDIOTRIANGLES];	// max res unified faces

struct v_unify_t
{
	int	refcount;
	int	lastref;
	int	firstref;
	int	v;
	int m;
	int n;
	int t;
	v_unify_t *next;
};

EXTERN	v_unify_t *v_list[MAXSTUDIOVERTS];
EXTERN	v_unify_t v_listdata[MAXSTUDIOVERTS];
EXTERN	int numvlist;

int SortAndBalanceBones( int iCount, int iMaxCount, int bones[], float weights[] );
void Grab_Vertexanimation( s_source_t *psource );
extern void BuildIndividualMeshes( s_source_t *psource );
