Changeset 2337 for GTP/trunk/App/Demos/Illum/Ogre/Media/materials/GTPAdvancedEnvMap/diffuse/GTPDiffuse.hlsl

Timestamp:

04/24/07 14:10:34 (17 years ago)

Author:

szirmay

Message:

 

File:

• GTP/trunk/App/Demos/Illum/Ogre/Media/materials/GTPAdvancedEnvMap/diffuse/GTPDiffuse.hlsl (modified) (4 diffs)

GTP/trunk/App/Demos/Illum/Ogre/Media/materials/GTPAdvancedEnvMap/diffuse/GTPDiffuse.hlsl

@@ -6 +6 @@
 float4 readCubeMap(samplerCUBE cm, float3 coord)                
 {
-        float4 color = texCUBElod( cm, float4(coord.xy, -coord.z, 1) );
+        float4 color = texCUBElod( cm, float4(coord.xy, -coord.z, 0) );
         color.a = 1;
         return color;
@@ -13 +13 @@
 float readDistanceCubeMap(samplerCUBE dcm, float3 coord)                
 {
-        float dist = texCUBElod(dcm, float4(coord.xy, - coord.z, 1)).r;
+        float dist = texCUBElod(dcm, float4(coord.xy, - coord.z, 0)).r;
         if(dist == 0) dist = 1000000; ///sky
         return dist;
@@ -26 +26 @@
  float4 MPos : TEXCOORD0;
 };
-
+/*
 float4 ReduceCubeMap_PS(MPos_OUT IN,
                                                 uniform int nFace,
@@ -54 +54 @@
         return color / (RATE * RATE);           
 }
-
+*/
+
+float4 ReduceCubeMap_PS(MPos_OUT IN,
+                                                uniform int nFace,
+                                                uniform samplerCUBE EnvironmentMapSampler : register(s0) ) : COLOR
+{  
+   float4 color = 0;
+   float3 dir;
+  
+   for (int i = 0; i < RATE/2; i+=1)
+     for (int j = 0; j < RATE/2; j+=1)
+    {
+                float2 pos;
+                pos.x = IN.MPos.x + (4*i + 2)/(float)CUBEMAP_SIZE;
+                pos.y = IN.MPos.y - (4*j + 2)/(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 / 4.0);             
+}
 
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