Make fog density a uniform

mitsuhiko · Jan 9, 2012 · faa2207 · faa2207
1 parent 48b1242
commit faa2207
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Showing 2 changed files with 4 additions and 1 deletion.
diff --git a/assets/shaders/block.glsl b/assets/shaders/block.glsl
@@ -3,6 +3,7 @@
 #include "fog.glsl"
 uniform vec3 uSunDirection;
 uniform vec4 uFogColor;
+uniform float uFogDensity;
 uniform vec4 uSunColor;
 varying vec3 vNormal;
 varying vec2 vTextureCoord;
@@ -18,7 +19,7 @@ void main(void)
     vSunDirection = uSunDirection;
     vNormal = uNormalMatrix * aVertexNormal;
     vHalfVec = normalize(aVertexPosition + vSunDirection);
-    vFogFactor = getFogFactor(0.005);
+    vFogFactor = getFogFactor(uFogDensity);
 }
 #endif
 

diff --git a/src/world.coffee b/src/world.coffee
@@ -94,6 +94,7 @@ class World
     @sunColor = webglmc.floatColorFromHex '#F2F3DC'
     @sunDirection = vec3.create [0.7, 0.8, 1.0]
     @fogColor = webglmc.floatColorFromHex '#CEEBC0'
+    @fogDensity = 0.01
 
     @displays =
       chunkStats: webglmc.debugPanel.addDisplay 'Chunk stats'
@@ -373,6 +374,7 @@ class World
       @shader.uniform4fv "uSunColor", @sunColor
       @shader.uniform3fv "uSunDirection", @sunDirection
       @shader.uniform4fv "uFogColor", @fogColor
+      @shader.uniform1f "uFogDensity", @fogDensity
       this.iterVisibleVBOs (vbo) =>
         vbo.draw()