#include "mathlib.h"

#define	LUMP_ENTITIES		0
#define	LUMP_SHADERS		1
#define	LUMP_PLANES			2
#define	LUMP_NODES			3
#define	LUMP_LEAFS			4
#define	LUMP_LEAFSURFACES	5
#define	LUMP_LEAFBRUSHES	6
#define	LUMP_MODELS			7
#define	LUMP_BRUSHES		8
#define	LUMP_BRUSHSIDES		9
#define	LUMP_DRAWVERTS		10
#define	LUMP_DRAWINDEXES	11
#define	LUMP_FOGS			12
#define	LUMP_SURFACES		13
#define	LUMP_LIGHTMAPS		14
#define	LUMP_LIGHTGRID		15
#define	LUMP_VISIBILITY		16
#define	HEADER_LUMPS		17

typedef struct {
	int		fileofs, filelen;
} lump_t;

typedef struct {
	int			ident;
	int			version;

	lump_t		lumps[HEADER_LUMPS];
} dheader_t;

typedef struct {
	float		normal[3];
	float		dist;
} dplane_t;

typedef struct {
	int			planeNum;
	int			children[2];	// negative numbers are -(leafs+1), not nodes
	int			mins[3];		// for frustom culling
	int			maxs[3];
} dnode_t;

typedef struct {
	int			cluster;			// -1 = opaque cluster (do I still store these?)
	int			area;

	int			mins[3];			// for frustum culling
	int			maxs[3];

	int			firstLeafSurface;
	int			numLeafSurfaces;

	int			firstLeafBrush;
	int			numLeafBrushes;
} dleaf_t;

typedef struct {
	vec3_t		xyz;
	float		st[2];
	float		lightmap[2];
	vec3_t		normal;
	byte		color[4];
} qdrawVert_t;

typedef struct {
	int			shaderNum;
	int			fogNum;
	int			surfaceType;

	int			firstVert;
	int			numVerts;

	int			firstIndex;
	int			numIndexes;

	int			lightmapNum;
	int			lightmapX, lightmapY;
	int			lightmapWidth, lightmapHeight;

	vec3_t		lightmapOrigin;
	vec3_t		lightmapVecs[3];	// for patches, [0] and [1] are lodbounds

	int			patchWidth;
	int			patchHeight;
} dsurface_t;

typedef struct {
	int			planeNum;			// positive plane side faces out of the leaf
	int			shaderNum;
} dbrushside_t;

typedef struct {
	int			firstSide;
	int			numSides;
	int			shaderNum;		// the shader that determines the contents flags
} dbrush_t;

typedef enum {
	MST_BAD,
	MST_PLANAR,
	MST_PATCH,
	MST_TRIANGLE_SOUP,
	MST_FLARE
} mapSurfaceType_t;

#define	MAX_MAP_VISIBILITY	0x200000
#define	MAX_MAP_NODES		0x20000
#define	MAX_MAP_PLANES		0x20000
#define	MAX_MAP_LEAFS		0x20000

extern	int			numVisBytes;
extern	int			numleafs;
extern	int			numplanes;
extern	int			numnodes;
extern	int			numDrawVerts;
extern	int			numDrawSurfaces;
extern	int			numleafsurfaces;
extern	int			numbrushes;
extern	int			numbrushsides;
extern	int			numleafbrushes;

extern	dnode_t			*dnodes;
extern	dplane_t		*dplanes;
extern	dleaf_t			*dleafs;
extern	byte			*visBytes;
extern	qdrawVert_t		*drawVerts;
extern	dsurface_t		*drawSurfaces;
extern	int				*dleafsurfaces;
extern	dbrush_t		*dbrushes;
extern	dbrushside_t	*dbrushsides;
extern	int				*dleafbrushes;

bool LoadBSPFile( const char *filename );
void FreeBSPData();