Changeset 2886 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SsaoShader.cpp

Timestamp:

08/29/08 20:33:21 (16 years ago)

Author:

mattausch

Message:

using gaussian distribution for sampling

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SsaoShader.cpp (modified) (3 diffs)

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

@@ -6 +6 @@
 #include "Camera.h"
 #include "shaderenv.h"
+#include "RndGauss.h"
+#include "Halton.h"
 
 
@@ -11 +13 @@
 
 static GLenum mymrt[] = {GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT, GL_COLOR_ATTACHMENT2_EXT, GL_COLOR_ATTACHMENT3_EXT};
+
 
 namespace CHCDemoEngine
@@ -103 +106 @@
 static void GenerateSamples()
 {
+#if 0
         static PoissonDiscSampleGenerator poisson(NUM_SAMPLES, 1.0f);
         poisson.Generate((Sample2 *)samples);
+#else
+        
+        const float radius = 1.0f;
+        const float sigma = ComputeSigmaFromRadius(1.0f);
+        
+        static HaltonSequence halton;
+
+        for (int i = 0; i < NUM_SAMPLES; ++ i)
+        {
+                Sample2 s;
+                Vector3 input;
+
+                halton.GetNext(3, (float *)&input.x);
+
+                PolarGaussianOnDisk(input,  // input (RND in interval [0-1)x[0-1))
+                                                    sigma,  // standard deviation of gaussian distribution
+                                                        radius, // standard deviation of gaussian distribution
+                                                        s);     // result
+                samples[i] = s;
+        }
+#endif
 }