/*
	render.h

	public interface to refresh functions

	Copyright (C) 1996-1997  Id Software, Inc.

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifndef _RENDER_H
#define _RENDER_H

#include "mathlib.h"
#include "cvar.h"
#include "vid.h"
//#include "model.h" 
//now we know why (struct model_s *) is used here instead of model_t
//damn circular reference ! same with player_info_s -- yan

#define	TOP_RANGE		16			// soldier uniform colors
#define	BOTTOM_RANGE	96

//=============================================================================

typedef struct efrag_s
{
	struct mleaf_s		*leaf;
	struct efrag_s		*leafnext;
	struct entity_s		*entity;
	struct efrag_s		*entnext;
} efrag_t;

typedef struct entity_s
{
        int                       keynum;                 // for matching entities in different frames
        vec3_t                    origin;
        vec3_t                    angles; 
        struct model_s            *model;                 // NULL = no model
        int                       frame;
        byte                      *colormap;
        int                       skinnum;                // for Alias models

        struct player_info_s      *scoreboard;    // identify player

        float                     syncbase;

        struct efrag_s            *efrag;                 // linked list of efrags (FIXME)
        int                       visframe;               // last frame this entity was
											// found in an active leaf
											// only used for static objects
											
        int                       dlightframe;    // dynamic lighting
        int                       dlightbits;

        float                     colormod[3];    // color tint for model
        float                     alpha;          // opacity (alpha) of the model
        float                     glowsize;       // how big the glow is
        byte                      glowcolor;      // color of glow and particle trail (paletted)
        byte                      glowtrail;      // leaves a trail of particles

// FIXME: could turn these into a union
        int                       trivial_accept;
        struct mnode_s            *topnode;      // for bmodels, first world node
                                                 //  that splits bmodel, or NULL if
                                                 //  not split
} entity_t;

// !!! if this is changed, it must be changed in asm_draw.h too !!!
typedef struct
{
	vrect_t		vrect;				// subwindow in video for refresh
									// FIXME: not need vrect next field here?
	vrect_t		aliasvrect;			// scaled Alias version
	int			vrectright, vrectbottom;	// right & bottom screen coords
	int			aliasvrectright, aliasvrectbottom;	// scaled Alias versions
	float		vrectrightedge;			// rightmost right edge we care about,
										//  for use in edge list
	float		fvrectx, fvrecty;		// for floating-point compares
	float		fvrectx_adj, fvrecty_adj; // left and top edges, for clamping
	int			vrect_x_adj_shift20;	// (vrect.x + 0.5 - epsilon) << 20
	int			vrectright_adj_shift20;	// (vrectright + 0.5 - epsilon) << 20
	float		fvrectright_adj, fvrectbottom_adj;
										// right and bottom edges, for clamping
	float		fvrectright;			// rightmost edge, for Alias clamping
	float		fvrectbottom;			// bottommost edge, for Alias clamping
	float		horizontalFieldOfView;	// at Z = 1.0, this many X is visible 
										// 2.0 = 90 degrees
	float		xOrigin;			// should probably allways be 0.5
	float		yOrigin;			// between be around 0.3 to 0.5

	vec3_t		vieworg;
	vec3_t		viewangles;

	float		fov_x, fov_y;
	
	int			ambientlight;
} refdef_t;

//
// refresh
//
extern	int		reinit_surfcache;

extern	refdef_t	r_refdef;
extern vec3_t	r_origin, vpn, vright, vup;

extern	struct texture_s	*r_notexture_mip;

extern	entity_t	r_worldentity;

void R_Init (void);
void R_InitTextures (void);
void R_InitEfrags (void);
void R_RenderView (void);		// must set r_refdef first
void R_ViewChanged (vrect_t *pvrect, int lineadj, float aspect);
								// called whenever r_refdef or vid change
void R_InitSky (struct texture_s *mt);	// called at level load

void R_AddEfrags (entity_t *ent);
void R_RemoveEfrags (entity_t *ent);

void R_NewMap (void);

void R_ParseParticleEffect (void);
void R_RunParticleEffect (vec3_t org, vec3_t dir, int color, int count);
void R_RocketTrail (vec3_t start, vec3_t end, int type, entity_t *ent);

void R_EntityParticles (entity_t *ent);
void R_BlobExplosion (vec3_t org);
void R_ParticleExplosion (vec3_t org);
void R_LavaSplash (vec3_t org);
void R_TeleportSplash (vec3_t org);

// LordHavoc: relative bmodel lighting
void R_PushDlights (vec3_t entorigin);
void R_InitParticles (void);
void R_ClearParticles (void);
void R_DrawParticles (void);
void R_DrawWaterSurfaces (void);

//
// surface cache related
//
extern	int		reinit_surfcache;	// if 1, surface cache is currently empty and
extern qboolean	r_cache_thrash;	// set if thrashing the surface cache

int	D_SurfaceCacheForRes (int width, int height);
void D_FlushCaches (void);
void D_DeleteSurfaceCache (void);
void D_InitCaches (void *buffer, int size);
void R_SetVrect (vrect_t *pvrect, vrect_t *pvrectin, int lineadj);

void R_LoadSkys (char *);

#endif // _RENDER_H