r_light.h

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/*
Copyright (C) 1997-2001 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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#ifndef R_LIGHT_H
#define R_LIGHT_H

struct entity_s;

#include "r_entity.h"

/* cap on number of light sources that can be in a scene; feel free 
 * to increase if necessary, but be aware that doing so will increase
 * the time it takes for each entity to sort the light list at each
 * frame (this is based on the number of lights actually used, not
 * the max number allowed) */
#define MAX_DYNAMIC_LIGHTS 64

typedef struct r_light_s {
    vec4_t loc;
    vec4_t ambientColor;
    vec4_t diffuseColor;
    vec4_t specularColor;

    float constantAttenuation;
    float linearAttenuation;
    float quadraticAttenuation;

    qboolean enabled;
} r_light_t;

void R_AddLight(const vec3_t origin, float radius, const vec3_t color);
void R_AddSustainedLight(const vec3_t org, float radius, const vec3_t color, float sustain);
void R_EnableLights(void);
void R_ShiftLights(const vec3_t offset);

void R_AddLightsource(const r_light_t *source);
void R_ClearActiveLights(void);
void R_UpdateLightList(struct entity_s *ent);

#endif