Darkplaces lighting/Light sources
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Revision as of 00:06, 6 August 2012
Engine supports two ways to get lights on the map.
World lights
Worlds lights are loaded from external .rtlights file supplied with a map (foo.bsp will try to load foo.rtlights). If there are not .rtlights file, engine tries to load lights from a map "light" entities, which often is grude and terrible slow (as "lights" are maked for map compiler LIGHT stage raytracer, not for reatime rendering). So producing a good .rtlights folr is very first step in a process of map creation.
World lights are static, meaning they canot be moved, rotated, altered during a game.
Each world light can have this parameters:
- origin : position
- angles : rotation
- color : RGB light color
- radius : radius of light in game units
- corona : corona intensity (0 to disable)
- coronasize : size of corona (this is multiplier to light radius)
- style : lights style number (see lightstyles above)
- shadows: whether to cast shadows from light
- cubemap : a path to cubemap filter texture
- ambient : ambient light intensity (ignores shading, makes lighting to be more 'flat')
- diffuse : shading light intensity (default is 1)
- specular : specular intensity (default is 1)
- normalmode : if this flag is set, light will be draws if cvar r_shadow_realtime_world is 0
- realtimemode : if this flag is set, light will be draws if cvar r_shadow_realtime_world is 1
Blood Omnicide tips:
Console variables:
r_shadow_realtime_world : Enables rendering of full world lighting (whether loaded from the map, or a .rtlights file, or a .ent file, or a .lights file produced by hlight) r_shadow_realtime_world_lightmaps : Brightness to render lightmaps when using full world lighting r_shadow_realtime_world_shadows : Enables rendering of shadows from world lights r_shadow_realtime_world_compile : Enables compilation of world lights for higher performance rendering (shadow volumes only) r_shadow_realtime_world_compileportalculling : Enables portal-based culling optimization during compilation (overrides compilesvbsp) r_shadow_realtime_world_compileshadow : Enables compilation of shadows from world lights for higher performance rendering (shadow volumes only) r_shadow_realtime_world_compilesvbsp : Enables svbsp optimization during compilation (slower than compileportalculling but more exact)Dynamic lights
Dynamic lights are cast from entities. This could be both server-side entities such as rockets or client-side entities such as explosions.
r_shadow_realtime_dlight : Enables rendering of dynamic lights such as explosions and rocket light r_shadow_realtime_dlight_portalculling : Enables portal optimization on dynamic lights r_shadow_realtime_dlight_shadows : Enables rendering of shadows from dynamic lights r_shadow_realtime_dlight_svbspculling : Enables svbsp optimization on dynamic lights
Next chapter: Tweaking
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