Darkplaces lighting/Lighting model - Revision history

212.232.33.42 at 09:50, 15 February 2013

2013-02-15T09:50:12Z

VorteX: /* Shadow mapping */

2012-11-23T03:31:58Z

‎Shadow mapping

VorteX: /* Shadow mapping */

2012-11-23T03:31:31Z

‎Shadow mapping

VorteX: /* Shadow mapping */

2012-11-23T03:31:14Z

‎Shadow mapping

VorteX: /* Shadows */

2012-11-23T03:30:37Z

‎Shadows

VorteX: /* Shadows */

2012-11-23T03:30:09Z

‎Shadows

VorteX: /* Specular */

2012-11-23T03:28:29Z

‎Specular

VorteX: /* Specular */

2012-11-23T03:27:38Z

‎Specular

VorteX: /* Other light models */

2012-11-23T03:24:33Z

‎Other light models

VorteX: /* Specular */

2012-11-23T03:23:22Z

‎Specular

@@ Line 16: / Line 16: @@
 * Color Map : base texture (best way to use [[diffuse]] texture)
 * Normal Map : texture storing additional surface curvature (optionally, alpha storing height)
-* Gloss Map : texture used for specular and containing gloss color (RGB) and optional exponent multiplier (alpha)
+* Gloss Map : texture used for specular reflection. Contains gloss color (RGB) and optional exponent multiplier (alpha)
 * Glow Map : texture's local luminance texture, RGB additive blended texture that entirely ignores shading
 * Light Vector : vector of light direction (either calculated for realtime light or got from deluxemap [[lightmap]] component)

@@ Line 121: / Line 121: @@
 * Takes less CPU time (as construction of shadow volumes is not required)
 * Distance-based LOD (far lights rendered with lower shadowmap resolution)
 {{hidden begin|Console variables}}

@@ Line 114: / Line 114: @@
 ===Shadow mapping===
-In 2010 [http://en.wikipedia.org/wiki/Shadow_mapping shadow mapping] was implemented by [http://sauerbraten.org/ Eihrul].
+In 2010 darkplaces got [http://en.wikipedia.org/wiki/Shadow_mapping shadow mapping] implemented by [http://sauerbraten.org/ Eihrul].
 Shadowmapping have a number of advantages over shadow volume rendering and is considered to replace it:

@@ Line 114: / Line 114: @@
 ===Shadow mapping===
-Since 2010 [http://en.wikipedia.org/wiki/Shadow_mapping shadow mapping] was implemented by [http://sauerbraten.org/ Eihrul].
+In 2010 [http://en.wikipedia.org/wiki/Shadow_mapping shadow mapping] was implemented by [http://sauerbraten.org/ Eihrul].
 Shadowmapping have a number of advantages over shadow volume rendering and is considered to replace it:

@@ Line 101: / Line 101: @@
 {{important|Shadows are quite complex render task, many lights casting many shadows may decrease rendering speed significantly. Map designer should plan his map with this limitation in mind - there should be no situation of many lights being seen from a certain point, or user will experience a game slowdown.}}
-Darkplaces supports two realtime shadowing techniques: shadow volumes and shadow mapping.
+Darkplaces supports two realtime shadowing techniques: stencil shadow volumes and shadow mapping.
-===Stencil shadows===
+===Stencil shadow volumes===
 [http://en.wikipedia.org/wiki/Shadow_volume Stencil shadow volumes] is a base shadow rendering method in Darkplaces.

@@ Line 101: / Line 101: @@
 {{important|Shadows are quite complex render task, many lights casting many shadows may decrease rendering speed significantly. Map designer should plan his map with this limitation in mind - there should be no situation of many lights being seen from a certain point, or user will experience a game slowdown.}}
-Darkplaces supports two realtime shadowing techniques.
+Darkplaces supports two realtime shadowing techniques: shadow volumes and shadow mapping.
 ===Stencil shadows===
@@ Line 113: / Line 113: @@
 {{cvar|r_showshadows|Show areas covered by shadow volumes. Useful for finding out why some areas of the map render slowly <nowiki>(bright blue = lots of passes, slow)</nowiki>. Only matters if using shadow volumes.}}
-===Shadowmapping===
+===Shadow mapping===
 Since 2010 [http://en.wikipedia.org/wiki/Shadow_mapping shadow mapping] was implemented by [http://sauerbraten.org/ Eihrul].
@@ Line 124: / Line 124: @@
 {{hidden begin|Console variables}}
-{{cvar|r_shadow_shadowmapping|Enables shadowmapping}}
+{{cvar|r_shadow_shadowmapping|Enables shadow mapping}}
 {{cvar|r_shadow_shadowmapping|Shadowmap [[bias]] parameter (this is multiplied by nearclip * 1024 / lodsize}}
 {{cvar|r_shadow_shadowmapping_bordersize|Shadowmap size bias for filtering}}
@@ Line 132: / Line 132: @@
 {{cvar|r_shadow_shadowmapping_minsize|Shadowmap size limit}}
 {{cvar|r_shadow_shadowmapping_nearclip|Shadowmap near clip in world units. Increasing this will make shadow rendering to be more precise (as more bits goes to middle range), at the cost of the small non-shadowed zone around light}}
-{{cvar|r_shadow_shadowmapping_polygonfactor|Slope-dependent shadowmapping bias}}
+{{cvar|r_shadow_shadowmapping_polygonfactor|Slope-dependent shadow mapping bias}}
-{{cvar|r_shadow_shadowmapping_polygonoffset|Constant shadowmapping bias}}
+{{cvar|r_shadow_shadowmapping_polygonoffset|Constant shadow mapping bias}}
 {{cvar|r_shadow_shadowmapping_precision|Makes shadowmaps have a maximum resolution of this number of pixels per light source radius unit such that, for example, at precision 0.5 a light with radius 200 will have a maximum resolution of 100 pixels}}
 {{cvar|r_shadow_shadowmapping_useshadowsampler|whether to use sampler2DShadow if available}}

@@ Line 64: / Line 64: @@
 {{cvar|r_ambient|Amount of ambient light to be added to all surfaces. Makes level brighter.}}
 ==Specular==
 Specular (or gloss) is the mirror-like reflection of light from a surface, in which light from a single incoming direction (a ray) is reflected into a single outgoing direction. Many well-known surfaces (metal, plastic, wood) is recognized by specularity they have.
 Specular offers two parameters to mess with:
-* Specular multiplier: intensity of specular effect, this could be very high or very low. It is modifier to gloss RGB.
+* Specular multiplier: intensity of specular effect, this could be very high or very low. It is multiplier to gloss texture.
 * Specular exponent: how 'sharp' gloss is, high values are used to make texture to be plastic-like, while lower ones are suitable for matte surfaces. Basically its just a modifier to gloss texture's alpha channel (which is forced to 1 if not supplied).

@@ Line 149: / Line 149: @@
 '''Cel shading'''
 :Altered shading for default lighting model.
 '''Lightmap'''
 :Lightmap with no deluxemap applied (just an old lightmap with no per-pixel lighting effects)