Changeset 2898 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SampleGenerator.cpp

Timestamp:

09/03/08 10:37:03 (16 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/SampleGenerator.cpp (modified) (1 diff)

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

@@ -87 +87 @@
         //cout << "minDist after= " << minDist << endl;
 }
+
+
+
+GaussianSampleGenerator::GaussianSampleGenerator(int numSamples, float radius):
+SampleGenerator(numSamples, radius)
+{}
+
+
+void GaussianSampleGenerator::Generate(Sample2 *samples) const
+{
+        static HaltonSequence halton;
+        float r[2];
+
+        const float sigma = mRadius;
+
+        const float p0 = 1.0f / (sigma * sqrt(2.0f * M_PI));
+        const float p1 = 1.0f / (sigma * sqrt(2.0f * M_PI));
+
+        for (int i = 0; i < mNumSamples; ++ i)
+        {
+                halton.GetNext(2, r);
+
+                float exp_x = -(r[0] * r[0]) / (2.0f * sigma * sigma);
+                float exp_y = -(r[1] * r[1]) / (2.0f * sigma * sigma);
+
+                samples[i].x = p0 * pow(M_E, exp_x);
+                samples[i].y = p1 * pow(M_E, exp_y);
+        }
+
+        //cout << "minDist after= " << minDist << endl;
+}