Changeset 563 for trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.cpp

Timestamp:

01/21/06 18:32:30 (18 years ago)

Author:

bittner

Message:

rss sampling changes, preprocessor::GenerateRays?

File:

• trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.cpp (modified) (2 diffs)

trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.cpp

@@ -33 +33 @@
 Preprocessor::~Preprocessor()
 {
-  cerr<<"Deleting view cells manager...\n";
+  Debug<<"Deleting view cells manager...\n";
   DEL_PTR(mViewCellsManager);
-  cerr<<"done.\n";
-  cerr<<"Deleting bsp tree...\n";
+  Debug<<"done.\n";
+  Debug<<"Deleting bsp tree...\n";
   DEL_PTR(mBspTree);
-  cerr<<"done.\n";
-  cerr<<"Deleting kd tree...\n";
+  Debug<<"done.\n";
+  Debug<<"Deleting kd tree...\n";
   DEL_PTR(mKdTree);
-  cerr<<"done.\n";
-  cerr<<"Deleting vspkd tree...\n";
+  Debug<<"done.\n";
+  Debug<<"Deleting vspkd tree...\n";
   DEL_PTR(mVspKdTree);
-  cerr<<"done.\n";
-  cerr<<"Deleting vspbsp tree...\n";
+  Debug<<"done.\n";
+  Debug<<"Deleting vspbsp tree...\n";
   DEL_PTR(mVspBspTree);
-  cerr<<"done.\n";
+  Debug<<"done.\n";
 }
 
@@ -429 +429 @@
         return true;
 }
+
+
+
+bool
+Preprocessor::GenerateRays(
+                                                   const int number,
+                                                   const int sampleType,
+                                                   SimpleRayContainer &rays
+                                                   )
+{
+  Vector3 origin, direction; 
+
+  for (int i=0; rays.size() < number; i++) {
+        mViewCellsManager->GetViewPoint(origin);
+        
+        
+        // now get the direction
+        switch (sampleType) {
+        case OBJECT_BASED_DISTRIBUTION: {
+          Vector3 point;
+          Vector3 normal;
+          int i = RandomValue(0, mObjects.size() - 1);
+          Intersectable *object = mObjects[i];
+          object->GetRandomSurfacePoint(point, normal);
+          direction = point - origin;
+        }
+          break;
+        case DIRECTION_BASED_DISTRIBUTION:
+          direction = UniformRandomVector();
+          break;
+        case DIRECTION_BOX_BASED_DISTRIBUTION: {
+          float alpha = RandomValue(0.0f, 2*M_PI);
+          float beta = RandomValue(-M_PI/2, M_PI/2);
+          direction = VssRay::GetDirection(alpha, beta);
+          break;
+        }
+        case SPATIAL_BOX_BASED_DISTRIBUTION:
+          direction = mKdTree->GetBox().GetRandomPoint() - origin;
+          break;
+        default:
+          // unsuported distribution type
+          return false;
+        }
+        // $$ jb the pdf is yet not correct for all sampling methods!
+        float pdf = 1.0f;
+        float c = Magnitude(direction);
+        if (c > Limits::Small) {
+          direction*=1.0f/c;
+          rays.AddRay(SimpleRay(origin, direction, pdf));
+        }
+  }
+  return true;
+}