/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2010-2014 QuakeSpasm developers

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

*/

#ifndef _QUAKE_RENDER_H
#define _QUAKE_RENDER_H

// refresh.h -- public interface to refresh functions

#define	MAXCLIPPLANES	11

#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;

//johnfitz -- for lerping
#define LERP_MOVESTEP	(1<<0) //this is a MOVETYPE_STEP entity, enable movement lerp
#define LERP_RESETANIM	(1<<1) //disable anim lerping until next anim frame
#define LERP_RESETANIM2	(1<<2) //set this and previous flag to disable anim lerping for two anim frames
#define LERP_RESETMOVE	(1<<3) //disable movement lerping until next origin/angles change
#define LERP_FINISH		(1<<4) //use lerpfinish time from server update instead of assuming interval of 0.1
//johnfitz

typedef struct entity_s
{
	qboolean				forcelink;		// model changed

	int						update_type;

	entity_state_t			baseline;		// to fill in defaults in updates

	double					msgtime;		// time of last update
	vec3_t					msg_origins[2];	// last two updates (0 is newest)
	vec3_t					origin;
	vec3_t					msg_angles[2];	// last two updates (0 is newest)
	vec3_t					angles;
	struct qmodel_s			*model;			// NULL = no model
	struct efrag_s			*efrag;			// linked list of efrags
	int						frame;
	float					syncbase;		// for client-side animations
	byte					*colormap;
	int						effects;		// light, particles, etc
	int						skinnum;		// for Alias models
	int						visframe;		// last frame this entity was
											//  found in an active leaf

	int						dlightframe;	// dynamic lighting
	int						dlightbits;

// 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

	byte					alpha;			//johnfitz -- alpha
	byte					lerpflags;		//johnfitz -- lerping
	float					lerpstart;		//johnfitz -- animation lerping
	float					lerptime;		//johnfitz -- animation lerping
	float					lerpfinish;		//johnfitz -- lerping -- server sent us a more accurate interval, use it instead of 0.1
	short					previouspose;	//johnfitz -- animation lerping
	short					currentpose;	//johnfitz -- animation lerping
//	short					futurepose;		//johnfitz -- animation lerping
	float					movelerpstart;	//johnfitz -- transform lerping
	vec3_t					previousorigin;	//johnfitz -- transform lerping
	vec3_t					currentorigin;	//johnfitz -- transform lerping
	vec3_t					previousangles;	//johnfitz -- transform lerping
	vec3_t					currentangles;	//johnfitz -- transform lerping
} 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;


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_CheckEfrags (void); //johnfitz
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);
void R_EntityParticles (entity_t *ent);
void R_BlobExplosion (vec3_t org);
void R_ParticleExplosion (vec3_t org);
void R_ParticleExplosion2 (vec3_t org, int colorStart, int colorLength);
void R_LavaSplash (vec3_t org);
void R_TeleportSplash (vec3_t org);

void R_PushDlights (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);

#endif	/* _QUAKE_RENDER_H */

