//=======================================================================
//			Copyright XashXT Group 2010 ©
//		       com_model.h - cient model structures
//=======================================================================
#ifndef COM_MODEL_H
#define COM_MODEL_H

#include "bspfile.h"	// we need some declarations from it

/*
==============================================================================

	ENGINE MODEL FORMAT
==============================================================================
*/
#define STUDIO_RENDER	1
#define STUDIO_EVENTS	2

#define ZISCALE		((float)0x8000)

#define MIPLEVELS		4
#define VERTEXSIZE		7
#define MAXLIGHTMAPS	4
#define NUM_AMBIENTS	4		// automatic ambient sounds

// model types
typedef enum
{
	mod_bad = -1,
	mod_brush, 
	mod_sprite, 
	mod_alias, 
	mod_studio
} modtype_t;

typedef struct mplane_s
{
	vec3_t		normal;
	float		dist;
	byte		type;		// for fast side tests
	byte		signbits;		// signx + (signy<<1) + (signz<<1)
	byte		pad[2];
} mplane_t;

typedef struct
{
	vec3_t		position;
} mvertex_t;

typedef struct
{
	unsigned short	v[2];
	unsigned int	cachededgeoffset;
} medge_t;

typedef struct texture_s
{
	char		name[16];
	unsigned int	width, height;
	int		gl_texturenum;
	struct msurface_s	*texturechain;	// for gl_texsort drawing
	int		anim_total;	// total tenths in sequence ( 0 = no)
	int		anim_min, anim_max;	// time for this frame min <=time< max
	struct texture_s	*anim_next;	// in the animation sequence
	struct texture_s	*alternate_anims;	// bmodels in frmae 1 use these
	int		fb_texturenum;	// auto-luma texturenum
	unsigned int	unused[3];	// reserved 
} texture_t;

typedef struct
{
	float		vecs[2][4];	// [s/t] unit vectors in world space.
					// [i][3] is the s/t offset relative to the origin.
					// s or t = dot( 3Dpoint, vecs[i] ) + vecs[i][3]
	float		mipadjust;	// mipmap limits for very small surfaces
	texture_t		*texture;
	int		flags;		// sky or slime, no lightmap or 256 subdivision
} mtexinfo_t;

typedef struct glpoly_s
{
	struct glpoly_s	*next;
	struct glpoly_s	*chain;
	int		numverts;
	int		flags;          		// for SURF_UNDERWATER
//	struct glpoly_s	*fb_chain;		// next fb poly in chain
	float		verts[4][VERTEXSIZE];	// variable sized (xyz s1t1 s2t2)
} glpoly_t;

typedef struct mnode_s
{
// common with leaf
	int		contents;		// 0, to differentiate from leafs
	int		visframe;		// node needs to be traversed if current

	float		minmaxs[6];	// for bounding box culling
	struct mnode_s	*parent;

// node specific
	mplane_t		*plane;
	struct mnode_s	*children[2];	

	unsigned short	firstsurface;
	unsigned short	numsurfaces;
} mnode_t;

typedef struct msurface_s	msurface_t;
typedef struct decal_s	decal_t;

// JAY: Compress this as much as possible
struct decal_s
{
	decal_t		*pnext;		// linked list for each surface
	msurface_t	*psurface;	// Surface id for persistence / unlinking
	short		dx;		// Offsets into surface texture 
	short		dy;		// (in texture coordinates, so we don't need floats)
	short		texture;		// Decal texture
	byte		scale;		// Pixel scale
	byte		flags;		// Decal flags

	short		entityIndex;	// Entity this is attached to
};

typedef struct mleaf_s
{
// common with node
	int		contents;
	int		visframe;		// node needs to be traversed if current

	float		minmaxs[6];	// for bounding box culling

	struct mnode_s	*parent;
// leaf specific
	byte		*compressed_vis;
	struct efrag_s	*efrags;

	msurface_t	**firstmarksurface;
	int		nummarksurfaces;
	int		key;		// BSP sequence number for leaf's contents
	byte		ambient_sound_level[NUM_AMBIENTS];

} mleaf_t;

typedef struct msurface_s
{
	int		visframe;		// should be drawn when node is crossed

	mplane_t		*plane;		// pointer to shared plane
	int		flags;		// see SURF_ #defines

	int		firstedge;	// look up in model->surfedges[], negative numbers
	int		numedges;		// are backwards edges

	short		texturemins[2];
	short		extents[2];

	int		light_s, light_t;	// gl lightmap coordinates

	glpoly_t		*polys;		// multiple if warped
	struct msurface_s	*texturechain;

	mtexinfo_t	*texinfo;

	// lighting info
	int		dlightframe;	// last frame the surface was checked by an animated light
	int		dlightbits;	// dynamically generated. Indicates if the surface illumination
					// is modified by an animated light.

	int		lightmaptexturenum;
	byte		styles[MAXLIGHTMAPS];
	int		cached_light[MAXLIGHTMAPS];	// values currently used in lightmap
	qboolean		cached_dlight;		// true if dynamic light in cache

	color24		*samples;		// note: this is the actual lightmap data for this surface
	decal_t		*pdecals;
} msurface_t;

typedef struct hull_s
{
	dclipnode_t	*clipnodes;
	mplane_t		*planes;
	int		firstclipnode;
	int		lastclipnode;
	vec3_t		clip_mins;
	vec3_t		clip_maxs;
} hull_t;

#ifndef CACHE_USER
#define CACHE_USER
typedef struct cache_user_s
{
	void		*data;		// extradata
} cache_user_t;
#endif

typedef struct model_s
{
	char		name[64];		// model name
	qboolean		needload;		// bmodels and sprites don't cache normally

	// shared modelinfo
	modtype_t		type;		// model type
	int		numframes;	// sprite's framecount
	byte		*mempool;		// private mempool (was synctype)
	int		flags;		// hl compatibility

//
// volume occupied by the model
//
	vec3_t		mins, maxs;	// bounding box at angles '0 0 0'
	float		radius;
    
	// brush model
	int		firstmodelsurface;
	int		nummodelsurfaces;

	int		numsubmodels;
	dmodel_t		*submodels;	// or studio animations

	int		numplanes;
	mplane_t		*planes;

	int		numleafs;		// number of visible leafs, not counting 0
	mleaf_t		*leafs;

	int		numvertexes;
	mvertex_t		*vertexes;

	int		numedges;
	medge_t		*edges;

	int		numnodes;
	mnode_t		*nodes;

	int		numtexinfo;
	mtexinfo_t	*texinfo;

	int		numsurfaces;
	msurface_t	*surfaces;

	int		numsurfedges;
	int		*surfedges;

	int		numclipnodes;
	dclipnode_t	*clipnodes;

	int		nummarksurfaces;
	msurface_t	**marksurfaces;

	hull_t		hulls[MAX_MAP_HULLS];

	int		numtextures;
	texture_t		**textures;

	byte		*visdata;

	color24		*lightdata;
	char		*entities;
//
// additional model data
//
	cache_user_t	cache;		// only access through Mod_Extradata
} model_t;

typedef vec_t		vec4_t[4];

typedef struct alight_s
{
	int		ambientlight;	// clip at 128
	int		shadelight;	// clip at 192 - ambientlight
	vec3_t		color;
	float		*plightvec;
} alight_t;

typedef struct auxvert_s
{
	float		fv[3];		// viewspace x, y
} auxvert_t;

//
// sprite representation in memory
//
typedef enum { SPR_SINGLE = 0, SPR_GROUP, SPR_ANGLED } spriteframetype_t;

typedef struct mspriteframe_s
{
	int		width;
	int		height;
	float		up, down, left, right;
	int		gl_texturenum;
} mspriteframe_t;

typedef struct
{
	int		numframes;
	float		*intervals;
	mspriteframe_t	*frames[1];
} mspritegroup_t;

typedef struct
{
	spriteframetype_t	type;
	mspriteframe_t	*frameptr;
} mspriteframedesc_t;

typedef struct
{
	short		type;
	short		texFormat;
	int		maxwidth;
	int		maxheight;
	int		numframes;
	int		radius;
	int		facecull;
	int		synctype;
	mspriteframedesc_t	frames[1];
} msprite_t;

#endif//COM_MODEL_H