/*
	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 "QF/mathlib.h"
#include "QF/model.h"
#include "QF/cvar.h"
#include "QF/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

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

// LordHavoc: reindented this after 'Endy was here', also added scale.
typedef struct entity_s
{
	int						keynum; // for matching entities in different frames
	vec3_t					origin;
	vec3_t					old_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

	float					colormod[3]; // color tint for model
	float					alpha; // opacity (alpha) of the model
	float					scale; // size scaler of the model
	float					glow_size; // how big the glow is (can be negative)
	byte					glow_color; // color of glow (paletted)

	// 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

	// Animation interpolation
    float                   frame_start_time;
    float                   frame_interval;
    int                     pose1; 
    int                     pose2;
} 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 always 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_Init_Cvars (void);
void R_Textures_Init (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);

// LordHavoc: relative bmodel lighting
void R_PushDlights (vec3_t entorigin);
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

void *D_SurfaceCacheAddress (void);
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 (const char *);

#endif // _RENDER_H