Changeset 1765 for GTP/trunk/Lib/Vis/Preprocessing/src/SamplingStrategy.cpp

Timestamp:

11/18/06 23:15:55 (18 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/Lib/Vis/Preprocessing/src/SamplingStrategy.cpp (modified) (3 diffs)

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

@@ -166 +166 @@
 
         object->GetRandomSurfacePoint(point, normal);
+        
         direction = origin - point;
-
-        // $$ jb the pdf is yet not correct for all sampling methods!
-        const float c = Magnitude(direction);
-
-        if (c <= Limits::Small) 
-                return false;
+        
+        // $$ jb the pdf is yet not correct for all sampling methods!
+        const float c = Magnitude(direction);
+        
+        if ((c <= Limits::Small) || (DotProd(direction, normal) < 0))
+        {
+                return false;
+        }
 
         // $$ jb the pdf is yet not correct for all sampling methods!
@@ -178 +181 @@
         //cout << "p: " << point << " ";
         direction *= 1.0f / c;
+        // a little offset
+        point += direction * 0.01f;
+
         ray = SimpleRay(point, direction, pdf);
         
@@ -220 +226 @@
 }
 
+
 #if 0
 bool ObjectsInteriorDistribution::GenerateSample(SimpleRay &ray) const