Changeset 1763 for GTP/trunk/Lib/Vis/Preprocessing/src/SamplingStrategy.cpp

Timestamp:

11/16/06 19:41:44 (18 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/Lib/Vis/Preprocessing/src/SamplingStrategy.cpp (modified) (1 diff)

GTP/trunk/Lib/Vis/Preprocessing/src/SamplingStrategy.cpp

@@ -183 +183 @@
 }
 
+
+bool ViewCellBorderBasedDistribution::GenerateSample(SimpleRay &ray) const
+{
+        Vector3 origin, direction; 
+
+        ViewCellContainer &viewCells = mPreprocessor.mViewCellsManager->GetViewCells();
+
+        Vector3 point;
+        Vector3 normal, normal2;
+        
+        //cout << "y";
+        const int vcIdx = (int)RandomValue(0, (float)viewCells.size() - 0.5f);
+        const int objIdx = (int)RandomValue(0, (float)mPreprocessor.mObjects.size() - 0.5f);
+
+        Intersectable *object = mPreprocessor.mObjects[objIdx];
+        ViewCell *viewCell = viewCells[vcIdx];
+
+        object->GetRandomSurfacePoint(point, normal);
+        viewCell->GetRandomEdgePoint(origin, normal2);
+
+        direction = point - origin;
+
+        // $$ jb the pdf is yet not correct for all sampling methods!
+        const float c = Magnitude(direction);
+
+        if (c <= Limits::Small) 
+                return false;
+
+        // $$ jb the pdf is yet not correct for all sampling methods!
+        const float pdf = 1.0f;
+        //cout << "p: " << point << " ";
+        direction *= 1.0f / c;
+        ray = SimpleRay(origin, direction, pdf);
+        
+        return true;
+}
+
 #if 0
 bool ObjectsInteriorDistribution::GenerateSample(SimpleRay &ray) const