Changeset 2202 for GTP/trunk/App/Demos/Illum/Ogre/Media/PMDemo/PathMapWeightCompute.hlsl

Timestamp:

03/07/07 17:37:10 (17 years ago)

Author:

szirmay

Message:

 

File:

• GTP/trunk/App/Demos/Illum/Ogre/Media/PMDemo/PathMapWeightCompute.hlsl (modified) (3 diffs)

GTP/trunk/App/Demos/Illum/Ogre/Media/PMDemo/PathMapWeightCompute.hlsl

@@ -3 +3 @@
 
 uniform int nRadionColumns;
-uniform sampler2D radionSampler : register(s0);
+uniform sampler2D radionSampler       : register(s0);
+uniform sampler2D entryPointCountSampler : register(s1);
+uniform sampler2D allWeightsSampler   : register(s2);
 uniform float3 lightPos;
 uniform float3 lightDir;
+uniform float clusterCount;
 
 struct vsInputComputeWeights
@@ -43 +46 @@
                 dist2 = SAMPLECUTDIST2;
         diff = normalize(diff);
-        float cosa = - dot(lightDir, diff);
-        float cosb = dot(dir, diff);    
+        float cosa = max(dot(lightDir, -diff), 0);
+        float cosb = max(dot(dir, diff), 0);    
         
         /*
@@ -57 +60 @@
         float visibility = 1;
         
-        float ret;
-        if(  visibility < 0.5 || cosa < 0 || cosb < 0)
-                ret = 0.0;
+        float4 ret = cosa * cosb;
+
+        //return float4(lightDir + ret.x * 0.00000000001, 1);
+        return ret;
+        //return ret.x*0.0000000001 + 0.5;
+}
+
+float4 psSumWeights(vsOutputComputeWeights input) : COLOR0
+{
+        float halfPixel = 0.5 / clusterCount;
+        float iCluster = input.tex.x + halfPixel;
+        int entryPointCount = tex2D(entryPointCountSampler, float2(iCluster, 0.25));
+        int currentEntryPoint = tex2D(entryPointCountSampler, float2(iCluster, 0.75));
+        //sum entrypoint weights
+        float weight = 0;
+        float clusterRad = 0;
+        for(int i = 0; i < entryPointCount; i++)
+        {
+                float hp = float2(0.5 / (float) nRadionColumns, 0.5 / 4096.0);
+                float2 coord1 = float2((float)(currentEntryPoint % nRadionColumns)  / (float) nRadionColumns,
+                                                                currentEntryPoint / (float) nRadionColumns / 4096.0) + hp;
+                coord1.y = 1.0 - coord1.y;
+                float2 coord2 = coord1 + float2(hp.x / 2.0, 0);
+                float radrad = tex2Dlod(radionSampler, float4(coord2, 0, 0)).a;
+                //weight += tex2Dlod(allWeightsSampler, float4(coord1, 0, 0)).r * radrad;
+                weight += tex2Dlod(allWeightsSampler, float4(coord1, 0, 0)).r;
+                //clusterRad += radrad;
+                currentEntryPoint++;
+        }       
+        /*
+        if(clusterRad >= 0)
+                weight /= clusterRad;
         else
-                ret = pow(cosa, 9) * cosb / dist2;
-
-        if(ret < 0.000001)
-                ret = 0.0;
+                weight = 0;*/
         
-                return 1 + ret * 0.0000000001;
-        return float4(ret, ret, ret, ret);
+    weight /= (float) entryPointCount;
+                
+        return weight;
 }