Changeset 2054 for GTP/trunk/App/Demos/Illum/Ogre/Media/materials/programs/GameTools_Diffuse.hlsl

Timestamp:

01/24/07 21:44:30 (17 years ago)

Author:

szirmay

Message:

 

File:

• GTP/trunk/App/Demos/Illum/Ogre/Media/materials/programs/GameTools_Diffuse.hlsl (modified) (2 diffs)

GTP/trunk/App/Demos/Illum/Ogre/Media/materials/programs/GameTools_Diffuse.hlsl

@@ -1 +1 @@
 float REDUCED_CUBEMAP_SIZE;
+int CUBEMAP_SIZE = 128;
+int RATE = 32;
 
 float4 readCubeMap(samplerCUBE cm, float3 coord)                
@@ -13 +15 @@
         if(dist == 0) dist = 1000000; ///sky
         return dist;
+}
+
+
+/////
+/// Reduce cube map shader
+/////
+struct MPos_OUT
+{
+ float4 VPos : POSITION;
+ float4 MPos : TEXCOORD0;
+};
+
+float4 ReduceCubeMap_PS(MPos_OUT IN,
+                                                uniform int nFace,
+                                                uniform samplerCUBE EnvironmentMapSampler : register(s0) ) : COLOR
+{  
+   RATE = 32;
+   CUBEMAP_SIZE = 128;
+   float4 color = 0;
+   float3 dir;
+  
+   for (int i = 0; i < RATE; i++)
+     for (int j = 0; j < RATE; j++)
+    {
+                float2 pos;
+                pos.x = IN.mPos.x + (2*i + 1)/(float)CUBEMAP_SIZE;
+                pos.y = IN.mPos.y - (2*j + 1)/(float)CUBEMAP_SIZE;      // y=-u
+
+                // "scrambling"
+                if (nFace == 0) dir = float3(1, pos.y, -pos.x);
+                if (nFace == 1) dir = float3(-1, pos.y, pos.x);
+                if (nFace == 2) dir = float3(pos.x, 1, -pos.y);
+                if (nFace == 3) dir = float3(pos.x, -1, pos.y);
+                if (nFace == 4) dir = float3(pos.x, pos.y, 1);
+                if (nFace == 5) dir = float3(-pos.x, pos.y,-1);
+
+                color += texCUBE( EnvironmentMapSampler, dir);
+    }
+ 
+        return color / (RATE*RATE);             
 }