Changeset 223

Timestamp:

08/08/05 23:44:02 (19 years ago)

Author:

bittner

Message:

 

Location:

trunk/VUT/GtpVisibilityPreprocessor/src

Files:

• MutualVisibility.cpp (modified) (7 diffs)
• MutualVisibility.h (modified) (3 diffs)
• Rectangle3.cpp (added)
• Rectangle3.h (modified) (1 diff)
• SamplingPreprocessor.cpp (modified) (2 diffs)

trunk/VUT/GtpVisibilityPreprocessor/src/MutualVisibility.cpp

@@ -27 +27 @@
   Vector3 origin, direction;
   GetRay(rayIndex, origin, direction);
-  return origin + direction*mIntersections[rayIndex][depth].mT;
+  return origin + direction*mSamples[rayIndex].mIntersections[depth].mT;
 }
 
@@ -76 +76 @@
   switch (axis) {
   case 0:
-    sample1.mIntersections[0] = sample.mIntersections[0];
-    sample1.mIntersections[3] = sample.mIntersections[3];
-    
-    sample2.mIntersections[1] = sample.mIntersections[1];
-    sample2.mIntersections[2] = sample.mIntersections[2];
+    sample1.mSamples[0].mIntersections = sample.mSamples[0].mIntersections;
+    sample1.mSamples[3].mIntersections = sample.mSamples[3].mIntersections;
+    
+    sample2.mSamples[1].mIntersections = sample.mSamples[1].mIntersections;
+    sample2.mSamples[2].mIntersections = sample.mSamples[2].mIntersections;
     break;
 
   case 1:
-    sample1.mIntersections[0] = sample.mIntersections[0];
-    sample1.mIntersections[1] = sample.mIntersections[1];
-
-    sample2.mIntersections[2] = sample.mIntersections[2];
-    sample2.mIntersections[2] = sample.mIntersections[3];
+    sample1.mSamples[0].mIntersections = sample.mSamples[0].mIntersections;
+    sample1.mSamples[1].mIntersections = sample.mSamples[1].mIntersections;
+
+    sample2.mSamples[2].mIntersections = sample.mSamples[2].mIntersections;
+    sample2.mSamples[3].mIntersections = sample.mSamples[3].mIntersections;
     break;
   }
@@ -148 +148 @@
                                                  )
 {
-  Vector3 normal = target.Center() - source.Center();
-
+  Vector3 sourceCenter = source.Center();
+  Vector3 targetCenter = target.Center();
+  Vector3 normal = Normalize(sourceCenter - targetCenter );
+  
   Plane3 sourcePlane(normal, source.GetVertex(0));
   int i;
@@ -158 +160 @@
   }
   
-  Plane3 targetPlane(-normal, target.GetVertex(0));
+  Plane3 targetPlane(normal, target.GetVertex(0));
   for (i=1; i < 8; i++) {
     Vector3 v = target.GetVertex(i);
-    if (targetPlane.Distance(v) > 0)
-      targetPlane = Plane3(-normal, v);
+    if (targetPlane.Distance(v) < 0)
+      targetPlane = Plane3(normal, v);
   }
 
@@ -175 +177 @@
 
   Vector3 yBasis = Normalize( CrossProd(normal, xBasis) );
-  
-  Plane3 bottomPlane(xBasis, source.Center());
-  Plane3 sidePlane(yBasis, source.Center());
-  
-  // cast rays between corresponding vertices of the boxes
-  for (i=0; i < 8; i++) {
-    
-    
-  }
+  // cast rays between the centers of the boxes
+  Vector3 targetRCenter = targetPlane.FindIntersection(sourceCenter,
+                                                       targetCenter);
+  
+  Vector3 sourceRCenter = sourcePlane.FindIntersection(sourceCenter,
+                                                       targetCenter);
+  
+
+  Rectangle3 sourceRect;
+  Rectangle3 targetRect;
+
+  
+  float scale = Magnitude(source.Size())*0.7f;
+  sourceRect.mVertices[0] = sourceRCenter - scale*xBasis - scale*yBasis;
+  sourceRect.mVertices[1] = sourceRCenter + scale*xBasis - scale*yBasis;
+  sourceRect.mVertices[2] = sourceRCenter + scale*xBasis + scale*yBasis;
+  sourceRect.mVertices[3] = sourceRCenter - scale*xBasis + scale*yBasis;
+
+  scale = Magnitude(target.Size())*0.7f;
+  targetRect.mVertices[0] = targetRCenter - scale*xBasis - scale*yBasis;
+  targetRect.mVertices[1] = targetRCenter + scale*xBasis - scale*yBasis;
+  targetRect.mVertices[2] = targetRCenter + scale*xBasis + scale*yBasis;
+  targetRect.mVertices[3] = targetRCenter - scale*xBasis + scale*yBasis;
+
+  AddInitialSamples(sourceRect, targetRect, samples);
+
+  //    Plane3 bottomPlane(xBasis, source.Center());
+  //    Plane3 sidePlane(yBasis, source.Center());
+  
+  //    // cast rays between corresponding vertices of the boxes
+  //    for (i=0; i < 8; i++) {
+  //      Vector3 v;
+  //      bool coplanar;
+  //      v = sourcePlane.FindIntersection(source.GetVertex(i),
+  //                                 target.GetVertex(i),
+  //                                 NULL,
+  //                                 &coplanar);
+  //      if (!coplanar) {
+  //        // evaluate source and 
+  
+  //      }
+  //    }
   
   //  AddInitialSamples(sourceRectangle, targetRectangle, samples);
@@ -213 +248 @@
     sprintf(filename, "samples%04d-%02d.x3d", id++, i);
     Exporter *exporter = Exporter::GetExporter(filename);
+
+    exporter->SetWireframe();
+    exporter->ExportBox(mSource);
+    exporter->ExportBox(mTarget);
+
     exporter->SetFilled();
 
@@ -238 +278 @@
 
 int
+MutualVisibilitySampler::CastRays(RayShaft &shaft)
+{
+  Ray ray;
+  int i;
+
+  for (i=0; i < 4; i++) {
+    Vector3 origin, direction;
+    shaft.GetRay(i, origin, direction);
+    // determine intersections with the boxes
+    ray.Init(origin, direction, Ray::LINE_SEGMENT);
+    float stmin, stmax, ttmin, ttmax;
+    if ( mSource.GetMinMaxT(ray, &stmin, &stmax) && mTarget.GetMinMaxT(ray, &ttmin, &ttmax) ) {
+      shaft.mSamples[i].mMinT = stmax;
+      shaft.mSamples[i].mMaxT = ttmin;
+      origin = ray.Extrap(stmax);
+      direction = ray.Extrap(ttmin) - origin;
+      // reinit the ray
+      ray.Init(origin, direction, Ray::LINE_SEGMENT);
+      if (!mKdTree->CastRay(ray))
+        return VISIBLE;
+    } else {
+      shaft.mSamples[i].mMaxT = -1.0;
+    }
+  }
+  return INVISIBLE;
+}
+
+int
 MutualVisibilitySampler::ComputeVisibility()
 {
 
-  vector<RayShaft *> samples;
-  ConstructInitialSamples(mSource, mTarget, samples);
-  ExportSamples(samples);
-
-  stack<RayShaft *> sampleStack;
+  vector<RayShaft *> shafts;
+  ConstructInitialSamples(mSource, mTarget, shafts);
+  ExportSamples(shafts);
+
+  stack<RayShaft *> shaftStack;
   
   
   
   Ray ray;
-  // now process the samples as long as we have something to do
-  while (!sampleStack.empty()) {
-    RayShaft *sample = sampleStack.top();
-    sampleStack.pop();
+  // now process the shafts as long as we have something to do
+  while (!shaftStack.empty()) {
+    RayShaft *shaft = shaftStack.top();
+    shaftStack.pop();
     
 //      // cast a new ray
 //      int triangleSplitEdge = SetupExtremalRay(sample, source, ray);
     
-//      if (!kdTree->CastRay(ray))
-//        return VISIBLE;
-    
-//      // generate 2 new samples
-//      RayShaft newSamples[2];
-//      sample.Split(triangleSplitEdge, ray, newSamples[0], newSamples[1]);
-//      for (i=0; i < 2; i++) {
-//        newSamples[i].ComputeError();
-//        if (newSamples[i].mError > solidAngleThreshold) {
-//      sampleStack.push(newSamples[i]);
-//        }
-//      }
-//    }
-  }
-
-  for (int i=0; i < samples.size(); i++)
-    delete samples[i];
+    if (CastRays(*shaft) == VISIBLE)
+      return VISIBLE;
+    
+    //      // generate 2 new samples
+    //      RayShaft newSamples[2];
+    //      sample.Split(triangleSplitEdge, ray, newSamples[0], newSamples[1]);
+    //      for (i=0; i < 2; i++) {
+    //        newSamples[i].ComputeError();
+    //        if (newSamples[i].mError > solidAngleThreshold) {
+    //          sampleStack.push(newSamples[i]);
+    //        }
+    //      }
+    //    }
+  }
+
+  for (int i=0; i < shafts.size(); i++)
+    delete shafts[i];
   return INVISIBLE;
 }

trunk/VUT/GtpVisibilityPreprocessor/src/MutualVisibility.h

@@ -13 +13 @@
 };
 
+struct RaySample {
+  /// true if the sample really intersects both boxes
+  float mMinT;
+  float mMaxT;
+  /// intersections of the sample with the scene
+  vector<Ray::Intersection> mIntersections;
+  bool IsValid() const { return mMaxT > 0.0; }
+};
 
 struct RayShaft {
@@ -25 +33 @@
   Rectangle3 mTarget;
   
-  /// intersections with the scene
-  vector<Ray::Intersection> mIntersections[4];
+  RaySample mSamples[4];
   
   void ComputeError();
@@ -112 +119 @@
                   );
 
+  int
+  CastRays(RayShaft &shaft);
+
   void
   ComputeError(RayShaft &sample);
-
+  
   void
   ExportSamples(vector<RayShaft *> &samples);

trunk/VUT/GtpVisibilityPreprocessor/src/Rectangle3.h

@@ -38 +38 @@
         Rectangle3 &r1,
         Rectangle3 &r2
-        ) const
-
-  {//TODO
-  }
+        ) const;
   
 };

trunk/VUT/GtpVisibilityPreprocessor/src/SamplingPreprocessor.cpp

@@ -91 +91 @@
   
   while (totalSamples < mTotalSamples)
-  {
-          int passContributingSamples = 0;
-          int passSampleContributions = 0;
-          int passSamples = 0;
-          int index = 0;
-
-          for (i =0; i < objects.size(); i++) {
-                  KdNode *nodeToSample = NULL;
-                  Intersectable *object = objects[i];
-                  
-                  int pvsSize = object->mKdPvs.GetSize();
-      
-                  if (0 && pvsSize) {
-                          // mail all nodes from the pvs
-                          Intersectable::NewMail();
-                          KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
+    {
+      int passContributingSamples = 0;
+      int passSampleContributions = 0;
+      int passSamples = 0;
+      int index = 0;
+
+      for (i =0; i < objects.size(); i++) {
+        KdNode *nodeToSample = NULL;
+        Intersectable *object = objects[i];
+                  
+        int pvsSize = object->mKdPvs.GetSize();
+      
+        if (0 && pvsSize) {
+          // mail all nodes from the pvs
+          Intersectable::NewMail();
+          KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
                           
-                          for (; i != object->mKdPvs.mEntries.end(); i++) {
-                                  KdNode *node = (*i).first;
-                                  node->Mail();
-                          }
-
-                          int maxTries = 2*pvsSize;
-        
-                          for (int tries = 0; tries < 10; tries++) {
-                                  index = RandomValue(0, pvsSize - 1);
-                                  KdPvsData data;
-                                  KdNode *node;
-                                  object->mKdPvs.GetData(index, node, data);
-                                  nodeToSample = mKdTree->FindRandomNeighbor(node, true);
-                                  if (nodeToSample)
-                                          break;
-                          }
-                  }
-      
-              if (0 && pvsSize && pass == 50)  {
-                          // mail all nodes from the pvs
-                          Intersectable::NewMail();
-                          KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
-                          for (; i != object->mKdPvs.mEntries.end(); i++) {
-                                  KdNode *node = (*i).first;
-                                  node->Mail();
-                          }
-
-                          vector<KdNode *> invisibleNeighbors;
-                          // get all neighbors of all PVS nodes
-                          i = object->mKdPvs.mEntries.begin();
-
-                          for (; i != object->mKdPvs.mEntries.end(); i++) {
-                                  KdNode *node = (*i).first;
-                                  mKdTree->FindNeighbors(node, invisibleNeighbors, true);
-                                  AxisAlignedBox3 box = object->GetBox();
-                                  
-                                  for (int j=0; j < invisibleNeighbors.size(); j++) 
-                                  {
-                                          int visibility = ComputeBoxVisibility(mKdTree,
-                                                                                                                        box,
-                                                                                                                        mKdTree->GetBox(invisibleNeighbors[j]),
-                                                                                                                        1.0f);
-                                  }
-                                  // now rank all the neighbors according to probability that a new
-                                  // sample creates some contribution
-                          }
-                  }
-
-                  for (int k=0; k < mSamplesPerPass; k++) {
-                          object->GetRandomSurfacePoint(point, normal);
-                          
-                          if (nodeToSample) {
-                                  int maxTries = 5;
-                                  
-                                  for (int tries = 0; tries < maxTries; tries++) {
-                                          direction = mKdTree->GetBox(nodeToSample).GetRandomPoint() - point;
-
-                                          if (DotProd(direction, normal) > Limits::Small)
-                                                  break;
-                                  }
-                
-                                  if (tries == maxTries)
-                                          direction = UniformRandomVector(normal);
-                          } 
-                          else
-                                  direction = UniformRandomVector(normal);
-        
-                          // construct a ray
-                          SetupRay(ray, point, direction);
-                          mKdTree->CastRay(ray);
-
-                          if (i < pvsOut)
-                                  rays[i].push_back(ray);
-        
-                          int sampleContributions = 0;
-        
-                  
-                          if (ray.leaves.size()) {
-                                  sampleContributions += AddNodeSamples(object, ray, pass);
-          
-                                  if (ray.intersections.size()) {
-                                          sampleContributions += AddNodeSamples(ray.intersections[0].mObject, ray, pass);
-                                          // check whether we can add this to the rays
-                                          for (int j = 0; j < pvsOut; j++) {
-                                                  if (objects[j] == ray.intersections[0].mObject) {
-                                                          rays[j].push_back(ray);
-                                                  }
-                                          }
-                                  }
-
-                                  passSamples++;
+          for (; i != object->mKdPvs.mEntries.end(); i++) {
+            KdNode *node = (*i).first;
+            node->Mail();
+          }
+
+          int maxTries = 2*pvsSize;
+        
+          for (int tries = 0; tries < 10; tries++) {
+            index = RandomValue(0, pvsSize - 1);
+            KdPvsData data;
+            KdNode *node;
+            object->mKdPvs.GetData(index, node, data);
+            nodeToSample = mKdTree->FindRandomNeighbor(node, true);
+            if (nodeToSample)
+              break;
+          }
+        }
+
+        
+        if (pvsSize && pass == 50 ) {
+          // mail all nodes from the pvs
+          Intersectable::NewMail();
+          KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
+          for (; i != object->mKdPvs.mEntries.end(); i++) {
+            KdNode *node = (*i).first;
+            node->Mail();
+          }
+        
+          vector<KdNode *> invisibleNeighbors;
+          // get all neighbors of all PVS nodes
+          i = object->mKdPvs.mEntries.begin();
+          for (; i != object->mKdPvs.mEntries.end(); i++) {
+            KdNode *node = (*i).first;
+            mKdTree->FindNeighbors(node, invisibleNeighbors, true);
+            AxisAlignedBox3 box = object->GetBox();
+            for (int j=0; j < invisibleNeighbors.size(); j++) {
+              int visibility = ComputeBoxVisibility(mKdTree,
+                                                    box,
+                                                    mKdTree->GetBox(invisibleNeighbors[j]),
+                                                    1.0f);
+            
+            }
+            // now rank all the neighbors according to probability that a new
+            // sample creates some contribution
+          }
+        }
+
+      
+        for (int k=0; k < mSamplesPerPass; k++) {
+          object->GetRandomSurfacePoint(point, normal);
+        
+          if (nodeToSample) {
+            int maxTries = 5;
+          
+            for (int tries = 0; tries < maxTries; tries++) {
+              direction = mKdTree->GetBox(nodeToSample).GetRandomPoint() - point;
+            
+              if (DotProd(direction, normal) > Limits::Small)
+                break;
+            }
+          
+            if (tries == maxTries)
+              direction = UniformRandomVector(normal);
+          } 
+          else
+            direction = UniformRandomVector(normal);
+        
+          // construct a ray
+          SetupRay(ray, point, direction);
+          mKdTree->CastRay(ray);
+
+          if (i < pvsOut)
+            rays[i].push_back(ray);
+        
+          int sampleContributions = 0;
+        
+                  
+          if (ray.leaves.size()) {
+            sampleContributions += AddNodeSamples(object, ray, pass);
+          
+            if (ray.intersections.size()) {
+              sampleContributions += AddNodeSamples(ray.intersections[0].mObject, ray, pass);
+              // check whether we can add this to the rays
+              for (int j = 0; j < pvsOut; j++) {
+                if (objects[j] == ray.intersections[0].mObject) {
+                  rays[j].push_back(ray);
+                }
+              }
+            }
+
+            passSamples++;
                         
-                                  if (sampleContributions) {
-                                          passContributingSamples++;
-                                          passSampleContributions += sampleContributions;
-                                  }
-                          }
-                  }
+            if (sampleContributions) {
+              passContributingSamples++;
+              passSampleContributions += sampleContributions;
+            }
+          }
         }
-
-    totalSamples += passSamples;
-
-    //    if (pass>10)
-    //      HoleSamplingPass();
-    
-
-    pass++;
-    
-    int pvsSize = 0;
-    for (i=0; i < objects.size(); i++) {
-                Intersectable *object = objects[i];
-                pvsSize += object->mKdPvs.GetSize();
+      }
+
+      totalSamples += passSamples;
+
+      //    if (pass>10)
+      //      HoleSamplingPass();
+    
+
+      pass++;
+    
+      int pvsSize = 0;
+      for (i=0; i < objects.size(); i++) {
+        Intersectable *object = objects[i];
+        pvsSize += object->mKdPvs.GetSize();
+      }
+    
+      cout << "pass " << pass<<" : t = " << TimeDiff(startTime, GetTime())*1e-3 << "s" << endl;
+      cout << "#totalSamples=" << totalSamples/1000 
+           << "k   #sampleContributions=" << passSampleContributions << " (" 
+           << 100*passContributingSamples/(float)passSamples<<"%)" << " avgPVS="
+           << pvsSize/(float)objects.size() << endl 
+           << "avg ray contrib=" << passSampleContributions/(float)passContributingSamples << endl;
     }
-    
-        cout << "pass " << pass<<" : t = " << TimeDiff(startTime, GetTime())*1e-3 << "s" << endl;
-        cout << "#totalSamples=" << totalSamples/1000 
-                 << "k   #sampleContributions=" << passSampleContributions << " (" 
-                 << 100*passContributingSamples/(float)passSamples<<"%)" << " avgPVS="
-                 << pvsSize/(float)objects.size() << endl 
-                 << "avg ray contrib=" << passSampleContributions/(float)passContributingSamples << endl;
-  }
 
   int totalPvsSize = mKdTree->CollectLeafPvs();
@@ -235 +235 @@
   //  HoleSamplingPass();
   if (1) {
-          Exporter *exporter = Exporter::GetExporter("ray-density.x3d");
-          exporter->SetExportRayDensity(true);
-          exporter->ExportKdTree(*mKdTree);
-          delete exporter;
+    Exporter *exporter = Exporter::GetExporter("ray-density.x3d");
+    exporter->SetExportRayDensity(true);
+    exporter->ExportKdTree(*mKdTree);
+    delete exporter;
   }
   
   bool exportRays = false;
   if (exportRays) {
-          Exporter *exporter = NULL;
-          exporter = Exporter::GetExporter("sample-rays.x3d");
-          exporter->SetWireframe();
-          exporter->ExportKdTree(*mKdTree);
-
-          for (i=0; i < pvsOut; i++) 
-                  exporter->ExportRays(rays[i], 1000, RgbColor(1, 0, 0));
-          exporter->SetFilled();
-          
-          delete exporter;
+    Exporter *exporter = NULL;
+    exporter = Exporter::GetExporter("sample-rays.x3d");
+    exporter->SetWireframe();
+    exporter->ExportKdTree(*mKdTree);
+
+    for (i=0; i < pvsOut; i++) 
+      exporter->ExportRays(rays[i], 1000, RgbColor(1, 0, 0));
+    exporter->SetFilled();
+          
+    delete exporter;
   }
 
   if (1) {
-          for (int k=0; k < pvsOut; k++) {
-                  Intersectable *object = objects[k];
-                  char s[64];
-                  sprintf(s, "sample-pvs%04d.x3d", k);
-                  Exporter *exporter = Exporter::GetExporter(s);
-                  exporter->SetWireframe();
-                  KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
-                  
-                  Intersectable::NewMail();
-                  
-                  // avoid adding the object to the list
-                  object->Mail();
-                  ObjectContainer visibleObjects;
-                  for (; i != object->mKdPvs.mEntries.end(); i++) {
-                          KdNode *node = (*i).first;
-                          exporter->ExportBox(mKdTree->GetBox(node));
-                          mKdTree->CollectObjects(node, visibleObjects);
-                  }
-      
-                  exporter->ExportRays(rays[k], 1000, RgbColor(0, 1, 0));
-                  exporter->SetFilled();
-
-                  for (int j = 0; j < visibleObjects.size(); j++)
-                          exporter->ExportIntersectable(visibleObjects[j]);
-        
-                  Material m;
-                  m.mDiffuseColor = RgbColor(1, 0, 0);
-                  exporter->SetForcedMaterial(m);
-                  exporter->ExportIntersectable(object);
-      
-                  delete exporter;
-          }
+    for (int k=0; k < pvsOut; k++) {
+      Intersectable *object = objects[k];
+      char s[64];
+      sprintf(s, "sample-pvs%04d.x3d", k);
+      Exporter *exporter = Exporter::GetExporter(s);
+      exporter->SetWireframe();
+      KdPvsMap::iterator i = object->mKdPvs.mEntries.begin();
+                  
+      Intersectable::NewMail();
+                  
+      // avoid adding the object to the list
+      object->Mail();
+      ObjectContainer visibleObjects;
+      for (; i != object->mKdPvs.mEntries.end(); i++) {
+        KdNode *node = (*i).first;
+        exporter->ExportBox(mKdTree->GetBox(node));
+        mKdTree->CollectObjects(node, visibleObjects);
+      }
+      
+      exporter->ExportRays(rays[k], 1000, RgbColor(0, 1, 0));
+      exporter->SetFilled();
+
+      for (int j = 0; j < visibleObjects.size(); j++)
+        exporter->ExportIntersectable(visibleObjects[j]);
+        
+      Material m;
+      m.mDiffuseColor = RgbColor(1, 0, 0);
+      exporter->SetForcedMaterial(m);
+      exporter->ExportIntersectable(object);
+      
+      delete exporter;
+    }
   }