Changeset 3366 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/ssao.cg

Timestamp:

04/29/09 18:56:18 (15 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/ssao.cg (modified) (6 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/ssao.cg

@@ -474 +474 @@
                         bool isMovingObject,
                         float oldIdx,
-                        sampler2D attribsTex
+                        sampler2D attribsTex,
+                        float3 oldPos
                         )
 {
@@ -481 +482 @@
         float numSamples = .0f;
 
-        float3 diffVec = tex2Dlod(attribsTex, float4(IN.texCoord, 0, 0)).xyz;
+        //float3 diffVec = tex2Dlod(attribsTex, float4(IN.texCoord, 0, 0)).xyz;
 
         for (int i = 0; i < NUM_SAMPLES; ++ i) 
@@ -513 +514 @@
 
                 const float4 sampleColor = tex2Dlod(colors, float4(texcoord, .0f, .0f));
+                const float3 oldSamplePos = sampleColor.xyz;
                 const float3 samplePos = ReconstructSamplePos(sampleColor.w, texcoord, bl, br, tl, tr);
                 
@@ -549 +551 @@
                 if (cosAngle >= 0)
                 {
-                        float pixelValid = 0;//sampleColor.x;
-
-                        if (1)//pixelValid < 0.5f)
-                        {
-                                const float3 sampleDiffVec = tex2Dlod(attribsTex, float4(texcoord, .0f, .0f)).xyz;
-                                //pixelValid = max(pixelValid, length(sampleDiffVec - diffVec) < 5e-3f ? .0f : 100.0f);
-                                pixelValid = max(pixelValid, length(sampleDiffVec - diffVec) < 5e-3f ? .0f : 4.0f);
-                                //pixelValid = length(sampleDiffVec - diffVec) < 1e-3f ? .0f : 10.0f;
-                        }
-
-                        // hack:
-                        // we check if the sample could have been near enough to the current pixel 
-                        // or if the angle is small enough
-                        // to have any influence in the current or last frame
-
-                        const float changeFactor = sampleColor.y;
-                        const float partlyResetThres = 1.0f;
-
-                        if (0)//pixelValid <= partlyResetThres)
-                        {
-                                const float tooFarAway = step(0.5f, lengthToSample - changeFactor);
-                                validSamples = max(validSamples, pixelValid * (1.0f - tooFarAway) * step(-0.1f, cosAngle));
-                        }
-                        else
-                        {
-                                validSamples = max(validSamples, pixelValid);
-                        }
+                        const float oldDistance = length(oldSamplePos - oldPos);
+                        const float distanceDiff = abs(oldDistance - lengthToSample);
+
+                        float pixelValid = (distanceDiff > 1e-3f) ? 100.0f : 0;
+
+                        validSamples = max(validSamples, pixelValid);
                 }
 #ifdef USE_GTX
@@ -643 +624 @@
         // reconstruct position from the eye space depth
         const float3 viewDir = IN.view;
-        const float eyeSpaceDepth = tex2Dlod(colors, float4(IN.texCoord, 0, 0)).w;
+        const float4 mycolor = tex2Dlod(colors, float4(IN.texCoord, 0, 0));
+        const float eyeSpaceDepth = mycolor.w;
         const float4 eyeSpacePos = float4(-viewDir * eyeSpaceDepth, 1.0f);
 
@@ -712 +694 @@
                                           br, tl, tr, normalize(viewDir), 
                                           oldWeight, sampleIntensity, isMovingObject, oldIdx,
-                                          attribsTex);
+                                          attribsTex, mycolor.xyz);
 #endif                            
                 }