Changeset 3203

Timestamp:

12/01/08 18:38:36 (16 years ago)

Author:

mattausch

Message:

only adapting filter size left ...

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling

Files:

• src/Bvh.cpp (modified) (2 diffs)
• src/chcdemo.cpp (modified) (1 diff)
• src/shaderenv.h (modified) (1 diff)
• src/shaders/combineSsao.cg (modified) (2 diffs)
• src/shaders/ssao.cg (modified) (7 diffs)
• toto.txt (modified) (1 diff)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Bvh.cpp

@@ -548 +548 @@
         else
         {
-                BvhNodeContainer::const_iterator nit, nit_end = nodes.end();
-
-                /*for (nit = nodes.begin(); nit != nit_end; ++ nit)
-                {
-                        BvhNode *node = *nit;
-
-                        for (int i = 0; i < node->mNumTestNodes; ++ i)
-                        {
-                                RenderBoundingBoxImmediate(mTestNodes[node->mTestNodesIdx + i]->GetBox());
-                        }
-                }*/
-
                 renderedBoxes = PrepareBoundsWithDrawArrays(nodes);
                 RenderBoundsWithDrawArrays(renderedBoxes, state);
@@ -1315 +1303 @@
         else
         {
-                glPolygonMode(GL_FRONT, GL_LINE);
-                BvhNodeContainer nodes;
-                nodes.push_back(node);
-                int renderedBoxes = PrepareBoundsWithDrawArrays(nodes);
-                RenderBoundsWithDrawArrays(renderedBoxes, state);
-                glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-
-                /*for (int i = 0; i < node->mNumTestNodes; ++ i)
+                for (int i = 0; i < node->mNumTestNodes; ++ i)
                 {
                         RenderBoxForViz(mTestNodes[node->mTestNodesIdx + i]->GetBox());
-                }*/
+                }
         }
 

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/chcdemo.cpp

@@ -479 +479 @@
         //-- load some dynamic stuff
 
-        resourceManager->mUseNormalMapping = true;
+        //resourceManager->mUseNormalMapping = true;
         //resourceManager->mUseNormalMapping = false;
 
-        LoadModel("fisch.dem", dynamicObjects);
-        //LoadModel("hbuddha.dem", dynamicObjects);
+        //LoadModel("fisch.dem", dynamicObjects);
+        LoadModel("hbuddha.dem", dynamicObjects);
         //LoadModel("venusm.dem", dynamicObjects);
         //LoadModel("camel.dem", dynamicObjects);

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaderenv.h

@@ -7 +7 @@
 
 //#define NUM_SAMPLES 8
-#define NUM_SAMPLES 16
-//#define NUM_SAMPLES 24
+//#define NUM_SAMPLES 16
+#define NUM_SAMPLES 96
 
-//#define SAMPLE_INTENSITY 0.1f
-#define SAMPLE_INTENSITY 2.0f
+#define SAMPLE_INTENSITY 0.3f
+//#define SAMPLE_INTENSITY 2.0f
 
 #define SAMPLE_RADIUS 8e-1f

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

@@ -194 +194 @@
         const float m2 = min(texelCenterConv.z, texelCenterConv.w);
 
-        const float convergence = min(m1, m2);
+        const float minConvergence = min(m1, m2);
+
+        const float convergence = step(200.0f, minConvergence) * minConvergence;
         //const float convergence = ao.y;
 
@@ -205 +207 @@
                 const float distanceScale = 1.0f;
 
+                // descend to zero filter size after reaching thres pixels
                 const float convergenceWeight = thres / (SSAO_FILTER_WIDTH - 1.0f);
                 const float convergenceScale = convergenceWeight / (convergence + convergenceWeight);

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

@@ -174 +174 @@
         float total_ao = .0f;
         float numSamples = .0f;
+        float validSamples = .0f;
 
         for (int i = 0; i < NUM_SAMPLES; ++ i) 
@@ -233 +234 @@
 #endif
                 // check if the samples have been valid in the last frame
-                //numSamples += (1.0f - step(1.0f, lengthToSample)) * sampleColor.x;
+                validSamples += (1.0f - step(1.0f, lengthToSample)) * sampleColor.x;
+
                 ++ numSamples;
         }
@@ -239 +241 @@
         total_ao /= numSamples;
 
-        return float3(max(0.0f, 1.0f - total_ao), .0f, numSamples);
+        return float3(max(0.0f, 1.0f - total_ao), validSamples, numSamples);
 }
 
@@ -287 +289 @@
                 const float2 texcoord = IN.texCoord.xy + offsetTransformed * scaleFactor;
 
-                const float4 sampleColor = tex2Dlod(colors, float4(texcoord, 0, 0));
+                const float4 sampleColor = tex2Dlod(colors, float4(texcoord, .0f, .0f));
                 const float3 samplePos = ReconstructSamplePos(sampleColor.w, texcoord, bl, br, tl, tr);
                 
@@ -303 +305 @@
                 // angle between current normal and direction to sample controls AO intensity.
                 const float cosAngle = max(dot(dirSample, normal), .0f);
-        
-                // the distance_scale offset is used to avoid singularity that occurs at global illumination when 
-                // the distance to a sample approaches zero
-                //const float aoContrib = SAMPLE_INTENSITY / (DISTANCE_SCALE + lengthToSample * lengthToSample);
                 const float aoContrib = SAMPLE_INTENSITY / sqrLen;
                 //const float aoContrib = (1.0f > lengthToSample) ? occlusionPower(9e-2f, DISTANCE_SCALE + lengthToSample): .0f;
@@ -321 +319 @@
 
                 // check if the samples have been valid in the last frame
-                validSamples += (1.0f - step(1.0f, lengthToSample)) * sampleColor.x;
+                // hack: the distance measure can fail in some cases => choose something different
+                const float tooFarAway = step(1.0f, lengthToSample);
+                validSamples += (1.0f - tooFarAway) * sampleColor.x;
                 //validSamples += sampleColor.x;
 
                 ++ numSamples;
-                //if ((validSamples < 1.0f) && (newWeight > 20) && (numSamples >= 8)) break;
+
+                //if ((validSamples < 1.0f) && (newWeight > 200) && (numSamples >= 8)) break;
+                if ((validSamples < 1.0f) && (numSamples >= 8)) break;
         }
 
@@ -401 +403 @@
         if (eyeSpaceDepth < 1e10f)
         {
-                //ao = ssao(IN, colors, noiseTex, samples, normal, eyeSpacePos.xyz, scaleFactor, bl, br, tl, tr, normalize(viewDir), oldWeight);
-                ao = ssao2(IN, colors, noiseTex, samples, normal, eyeSpacePos.xyz, scaleFactor, bl, br, tl, tr, normalize(viewDir), normals);
+                ao = ssao(IN, colors, noiseTex, samples, normal, eyeSpacePos.xyz, scaleFactor, bl, br, tl, tr, normalize(viewDir), oldWeight);
+                //ao = ssao2(IN, colors, noiseTex, samples, normal, eyeSpacePos.xyz, scaleFactor, bl, br, tl, tr, normalize(viewDir), normals);
         }
         else

GTP/trunk/App/Demos/Vis/FriendlyCulling/toto.txt

@@ -104 +104 @@
 problem: 
 
+
+
+=========================
+
+1) ssao filter kernel: grows smaller too fast => flickering ... use
+adaptive number of samples instead of size?
+2) fix color bleeding
+3) fix ssao2 so that ssao contribution stays constant
+4) find physical expressions for constants in ssao
+5) retry normal discontinuity for ssao filter
+6) fix adaptive sampling for ssao and ssao2
+   a) sample adaptive if found invalid sample
+   b) sample adaptive if number of valid samples small?
+   
+   q: is it good to choose new weight as we do? (approx 4 frames)
+   or shouldn't we just completely reset sample?