Changeset 1787 for GTP/trunk/Lib/Vis

Timestamp:

11/24/06 12:05:28 (18 years ago)

Author:

mattausch

Message:

 

Location:

GTP/trunk/Lib/Vis/Preprocessing/src

Files:

• BvHierarchy.cpp (modified) (5 diffs)
• HierarchyManager.cpp (modified) (7 diffs)
• HierarchyManager.h (modified) (1 diff)
• ViewCellsManager.cpp (modified) (9 diffs)
• ViewCellsManager.h (modified) (3 diffs)

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

@@ -2159 +2159 @@
         
         if (mApplyInitialPartition)
-        {cout << "here29"<<endl;
+        {
                 ApplyInitialSubdivision(oSubdivisionCandidate, tQueue);         
         }
@@ -2517 +2517 @@
         tempQueue.Push(firstCandidate);
         while (!tempQueue.Empty())
-        {cout << "here2"<<endl;
+        {
                 SubdivisionCandidate *candidate = tempQueue.Top();
                 tempQueue.Pop();
@@ -2529 +2529 @@
                 if (!InitialTerminationCriteriaMet(bsc->mParentData))
                 {
-                        cout << "here12"<<endl;
                         cout << "here9"<<bsc->mParentData.mNode->mObjects.size()<<endl;
                         BvhNode *node = Subdivide(tempQueue, bsc, globalCriteriaMet);
@@ -2555 +2554 @@
 
         ObjectContainer::const_iterator oit, oit_end = objects->end();
-    cout<<"here104"<<endl;
-        for (oit = objects->begin(); oit != objects->end(); ++ oit)
-        {
-                //cout << (*oit)->GetBox().SurfaceArea() << " ";
-        }
+   
+        /*for (oit = objects->begin(); oit != objects->end(); ++ oit)
+        {
+                cout << (*oit)->GetBox().SurfaceArea() << " ";
+        }*/
 
         float maxAreaDiff = -1.0f;
@@ -2566 +2565 @@
 
     for (oit = objects->begin(); oit != (objects->end() - 1); ++ oit)
-        {//cout << "h";
+        {
                 Intersectable *objS = *oit;
                 Intersectable *objL = *(oit + 1);

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

@@ -1813 +1813 @@
 
 
-// TODO matt: implement this function for different storing methods
-void HierarchyManager::GetPvsIncrementally(ViewCell *vc, ObjectPvs &pvs) const
+void HierarchyManager::GetPvsEfficiently(ViewCell *viewCell, ObjectPvs &pvs) const
 {
         ////////////////
@@ -1821 +1820 @@
         // add pvs from leaves
         stack<ViewCell *> tstack;
-        tstack.push(vc);
+        tstack.push(viewCell);
+
+        Intersectable::NewMail();
 
         while (!tstack.empty())
         {
-                vc = tstack.top();
+                ViewCell *vc = tstack.top();
                 tstack.pop();
         
@@ -1831 +1832 @@
                 if (!vc->GetPvs().Empty())
                 {
-                        if (vc->IsLeaf()) cout << " l " << pvs.GetSize();
-                        else cout << " i " << pvs.GetSize();
-                        pvs.MergeInPlace(vc->GetPvs());
+                        ObjectPvsIterator pit = vc->GetPvs().GetIterator();
+
+                        while (pit.HasMoreEntries())
+                        {               
+                                const ObjectPvsEntry &entry = pit.Next();
+
+                                Intersectable *object = entry.mObject;
+                                if (!object->Mailed())
+                                {
+                                        object->Mail();
+                                        pvs.AddSampleDirty(object, 1.0f);
+                                }
+                        }
                 }
                 else if (!vc->IsLeaf()) // interior cells: go down to leaf level
                 {
-                        cout <<" t";
                         ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
                         ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
@@ -1846 +1856 @@
                         }               
                 }
+        }
+}
+
+
+// TODO matt: implement this function for different storing methods
+void HierarchyManager::GetPvsIncrementially(ViewCell *vc, ObjectPvs &pvs) const
+{
+        ////////////////
+        //-- pvs is not stored with the interiors => reconstruct
+        
+        // add pvs from leaves
+        stack<ViewCell *> tstack;
+        tstack.push(vc);
+
+        while (!tstack.empty())
+        {
+                vc = tstack.top();
+                tstack.pop();
+        
+                // add newly found pvs to merged pvs: break here even for interior
+                if (!vc->GetPvs().Empty())
+                {
+                        //if (vc->IsLeaf()) cout << " l " << pvs.GetSize();
+                        //else cout << " i " << pvs.GetSize();
+                        pvs.MergeInPlace(vc->GetPvs());
+                }
+                else if (!vc->IsLeaf()) // interior cells: go down to leaf level
+                {
+                        //cout <<" t";
+                        ViewCellInterior *interior = dynamic_cast<ViewCellInterior *>(vc);
+                        ViewCellContainer::const_iterator it, it_end = interior->mChildren.end();
+
+                        for (it = interior->mChildren.begin(); it != it_end; ++ it)
+                        {
+                                tstack.push(*it);
+                        }               
+                }
                 else cout <<"k";
         }
@@ -1875 +1922 @@
                 if (!vc->GetPvs().Empty())
                 {
-                        /*if (vc->IsLeaf()) 
-                                cout << " l " << viewCell->GetPvs().GetSize();
-                        else cout << " i " << viewCell->GetPvs().GetSize();
-                        */
-                                viewCell->GetPvs().MergeInPlace(vc->GetPvs());
+                        viewCell->GetPvs().MergeInPlace(vc->GetPvs());
                 }
                 else if (!vc->IsLeaf()) // interior cells: go down to leaf level
@@ -1963 +2006 @@
         ViewCell::NewMail();
 
-        cout << "\n**************viewcells: " << viewCells.size() << endl;
+        //cout << "\nviewcells: " << viewCells.size() << endl;
         for (vit = viewCells.begin(); vit != vit_end; ++ vit)
         {
                 ViewCell *vc = *vit;
-
-                //cout << "\nhere5: ";
                 float rc = 0;
         
 #if STUPID_METHOD       
                 ObjectPvs pvs;
-                GetPvsIncrementally(vc, pvs);
+                GetPvsIncrementially(vc, pvs);
                 vc->SetPvs(pvs);
+                
 #else
-                //PullUpPvsIncrementally(vc);
+        
                 ObjectPvs pvs;
-                GetPvsRecursive(vc, pvs);
-                vc->SetPvs(pvs);
+                //GetPvsRecursive(vc, pvs);
+                
+                // uses mailing
+                // warning: pvs not sorted!!
+                if (vc->GetPvs().Empty())
+                {
+                        GetPvsEfficiently(vc, pvs);
+                        vc->SetPvs(pvs);
+                        //cout << "q";
+                }
+                //else cout << "t";
 #endif
 
@@ -1991 +2042 @@
                         const long endT = GetTime();
 
-                        cout << "filter computed in " << TimeDiff(startT, endT) * 1e-3f << " secs" << endl;
+                        //cout << "filter computed in " << TimeDiff(startT, endT) * 1e-3f << " secs" << endl;
                         ComputePvs(filteredPvs, rc, pvsEntries);
                 }

GTP/trunk/Lib/Vis/Preprocessing/src/HierarchyManager.h

@@ -523 +523 @@
 
         void ComputePvs(const ObjectPvs &pvs, float &rc, int &pvsEntries);
-        void GetPvsIncrementally(ViewCell *vc, ObjectPvs &pvs) const;
+        void GetPvsIncrementially(ViewCell *vc, ObjectPvs &pvs) const;
         void PullUpPvsIncrementally(ViewCell *viewCell) const;
         void GetPvsRecursive(ViewCell *vc, ObjectPvs &pvs) const;
+        void GetPvsEfficiently(ViewCell *vc, ObjectPvs &pvs) const;
+
 protected:
 

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

@@ -32 +32 @@
 
 // $$JB HACK
-#define USE_KD_PVS 1
+#define USE_KD_PVS 0
 #define KD_PVS_AREA (1e-5f)
 
@@ -2591 +2591 @@
 
 
-void ViewCellsManager::MergeViewCellsEfficient(ObjectPvs &pvs, const ViewCellContainer &viewCells) const
-{
-        LocalMergeTree mergeTree(viewCells);
-        mergeTree.Merge(pvs);
-}
+void ViewCellsManager::MergeViewCellsRecursivly(ObjectPvs &pvs, 
+                                                                                                const ViewCellContainer &viewCells) const
+{
+        MergeViewCellsRecursivly(pvs, viewCells, 0, (int)viewCells.size() - 1);
+}
+
+
+void ViewCellsManager::MergeViewCellsRecursivly(ObjectPvs &pvs, 
+                                                                                                const ViewCellContainer &viewCells, 
+                                                                                                const int leftIdx, 
+                                                                                                const int rightIdx) const
+{
+        if (leftIdx == rightIdx)
+        {
+                pvs = viewCells[leftIdx]->GetPvs();
+        }
+        else
+        {
+                const int midSplit = (leftIdx + rightIdx) / 2;
+        
+                ObjectPvs leftPvs, rightPvs;
+                MergeViewCellsRecursivly(leftPvs, viewCells, leftIdx, midSplit);
+                MergeViewCellsRecursivly(rightPvs, viewCells, midSplit, rightIdx);
+
+        ObjectPvs::Merge(pvs, leftPvs, rightPvs);
+        }
+}
+
 
 #if 1
@@ -2605 +2628 @@
                                                            )
 {
+        cout<<"y";
   PvsFilterStatistics stats;
 
@@ -2629 +2653 @@
   float samples = (float)basePvs.GetSamples();
   
-  Debug<<"f #s="<<samples<<"pvs size = "<<basePvs.GetSize();
+  Debug<<"f #s="<<samples<<"  pvs size = "<<basePvs.GetSize();
   //  cout<<"Filter size = "<<filterSize<<endl;
   //  cout<<"vbox = "<<vbox<<endl;
@@ -2754 +2778 @@
                                                            ObjectPvs &pvs
                                                            )
-{cout << "x";
-  PvsFilterStatistics stats;
-
-  AxisAlignedBox3 vbox = GetViewCellBox(viewCell);
-  Vector3 center = vbox.Center();
-  // copy the PVS
-  ObjectPvs basePvs = viewCell->GetPvs();
-  Intersectable::NewMail();
-
-  ObjectPvsIterator pit = basePvs.GetIterator();
+{
+        cout << "x";
+        PvsFilterStatistics stats;
+
+        AxisAlignedBox3 vbox = GetViewCellBox(viewCell);
+        Vector3 center = vbox.Center();
+        // copy the PVS
+        ObjectPvs basePvs;// = viewCell->GetPvs();
+        Intersectable::NewMail();
+
+        ObjectPvsIterator pit = viewCell->GetPvs().GetIterator();
 
 #if !USE_KD_PVS
-  // first mark all object from this pvs
-  while (pit.HasMoreEntries()) {                
-        ObjectPvsEntry entry = pit.Next();
-        
-        Intersectable *object = entry.mObject;
-        object->Mail();
-  }
+        // first mark all object from this pvs
+        while (pit.HasMoreEntries()) 
+        {               
+                ObjectPvsEntry entry = pit.Next();
+
+                Intersectable *object = entry.mObject;
+                object->Mail();
+        }
 #endif
 
-  int pvsSize = 0;
-  int nPvsSize = 0;
-  float samples = (float)basePvs.GetSamples();
-  
-  Debug<<"f #s="<<samples<<"pvs size = "<<basePvs.GetSize();
-  //  cout<<"Filter size = "<<filterSize<<endl;
-  //  cout<<"vbox = "<<vbox<<endl;
-  //  cout<<"center = "<<center<<endl;
-
-
-   // Minimal number of local samples to take into account
-   // the local sampling density.
-   // The size of the filter is a minimum of the conservative
-   // local sampling density estimate (#rays intersecting teh viewcell and
-   // the object)
-   // and gobal estimate for the view cell
-   // (total #rays intersecting the viewcell)
+        int pvsSize = 0;
+        int nPvsSize = 0;
+        float samples = (float)viewCell->GetPvs().GetSamples();
+
+        Debug<<"f #s="<<samples<<"pvs size = "<<viewCell->GetPvs().GetSize();
+        //  cout<<"Filter size = "<<filterSize<<endl;
+        //  cout<<"vbox = "<<vbox<<endl;
+        //  cout<<"center = "<<center<<endl;
+
+
+        // Minimal number of local samples to take into account
+        // the local sampling density.
+        // The size of the filter is a minimum of the conservative
+        // local sampling density estimate (#rays intersecting teh viewcell and
+        // the object)
+        // and gobal estimate for the view cell
+        // (total #rays intersecting the viewcell)
 #define MIN_LOCAL_SAMPLES 5
 
-  float viewCellRadius = 0.5f*Magnitude(vbox.Diagonal());
-  
-  // now compute the filter box around the current viewCell
-  
-  if (useViewSpaceFilter) {
-        //      float radius = Max(viewCellRadius/100.0f, avgRadius - viewCellRadius);
-        float radius = viewCellRadius/100.0f;
-        vbox.Enlarge(radius);
-        cout<<"vbox = "<<vbox<<endl;
-        ViewCellContainer viewCells;
-        ComputeBoxIntersections(vbox, viewCells);
-        ObjectPvs pvs;
-        MergeViewCellsEfficient(pvs, viewCells);
-        basePvs = pvs;
-                
-        // update samples and globalC
-        samples = (float)pvs.GetSamples();
-        //      cout<<"neighboring viewcells = "<<i-1<<endl;
-        //      cout<<"Samples' = "<<samples<<endl;
-  }
-
-  // Minimal number of samples so that filtering takes place
+        float viewCellRadius = 0.5f*Magnitude(vbox.Diagonal());
+
+        // now compute the filter box around the current viewCell
+
+        if (useViewSpaceFilter) 
+        {
+                //      float radius = Max(viewCellRadius/100.0f, avgRadius - viewCellRadius);
+                float radius = viewCellRadius/100.0f;
+                vbox.Enlarge(radius);
+                cout<<"vbox = "<<vbox<<endl;
+                ViewCellContainer viewCells;
+                ComputeBoxIntersections(vbox, viewCells);
+                
+                MergeViewCellsEfficient(basePvs, viewCells);
+                cout << "basepvs size " << basePvs.GetSize() << endl;
+                // update samples and globalC
+                samples = (float)pvs.GetSamples();
+                //      cout<<"neighboring viewcells = "<<i-1<<endl;
+                //      cout<<"Samples' = "<<samples<<endl;
+        }
+        else
+        {
+                basePvs = viewCell->GetPvs();
+        }
+
+        // Minimal number of samples so that filtering takes place
 #define MIN_SAMPLES  100
-  if (samples > MIN_SAMPLES) {
-        float globalC = 2.0f*filterSize/sqrt(samples);
-        
+        if (samples > MIN_SAMPLES) 
+        {
+                float globalC = 2.0f*filterSize/sqrt(samples);
+
+                pit = basePvs.GetIterator();
+
+                ObjectContainer objects;
+
+                while (pit.HasMoreEntries())
+                {               
+                        ObjectPvsEntry entry = pit.Next();
+
+                        Intersectable *object = entry.mObject;
+                        // compute filter size based on the distance and the numebr of samples
+                        AxisAlignedBox3 box = object->GetBox();
+
+                        float distance = Distance(center, box.Center());
+                        float globalRadius = distance*globalC;
+
+                        int objectSamples = (int)entry.mData.mSumPdf;
+                        float localRadius = MAX_FLOAT;
+
+                        if (objectSamples > MIN_LOCAL_SAMPLES)
+                        {
+                                localRadius = filterSize*0.5f*Magnitude(box.Diagonal())/
+                                                                sqrt((float)objectSamples);
+                        }
+
+                        //      cout<<"lr="<<localRadius<<" gr="<<globalRadius<<endl;
+
+                        // now compute the filter size
+                        float radius;
+
+                        if (localRadius < globalRadius) 
+                        {
+                                radius = localRadius;
+                                stats.mLocalFilterCount++;
+                        } 
+                        else 
+                        {
+                                radius = globalRadius;
+                                stats.mGlobalFilterCount++;
+                        }
+
+                        stats.mAvgFilterRadius += radius;
+
+                        // cout<<"box = "<<box<<endl;
+                        //      cout<<"distance = "<<distance<<endl;
+                        //      cout<<"radiues = "<<radius<<endl;
+
+                        box.Enlarge(Vector3(radius));
+                        objects.clear();
+
+                        // $$ warning collect objects takes only unmailed ones!
+                        CollectObjects(box, objects);
+
+                        //      cout<<"collected objects="<<objects.size()<<endl;
+                        ObjectContainer::const_iterator noi = objects.begin();
+                        for (; noi != objects.end(); ++ noi) 
+                        {
+                                Intersectable *o = *noi;
+                                // $$ JB warning: pdfs are not correct at this point!     
+                                pvs.AddSampleDirty(o, Limits::Small);
+                        }
+                }
+
+                stats.mAvgFilterRadius /= (stats.mLocalFilterCount + stats.mGlobalFilterCount);
+        }
+
+        Debug<<" nPvs size = "<<pvs.GetSize()<<endl;
+
+#if !USE_KD_PVS
+        // copy the base pvs to the new pvs
         pit = basePvs.GetIterator();
-        
-        ObjectContainer objects;
-        
-        while (pit.HasMoreEntries())
-          {             
+        while (pit.HasMoreEntries()) 
+        {               
                 ObjectPvsEntry entry = pit.Next();
-                
-                Intersectable *object = entry.mObject;
-                // compute filter size based on the distance and the numebr of samples
-                AxisAlignedBox3 box = object->GetBox();
-                
-                float distance = Distance(center, box.Center());
-                float globalRadius = distance*globalC;
-                
-                int objectSamples = (int)entry.mData.mSumPdf;
-                float localRadius = MAX_FLOAT;
-                if (objectSamples > MIN_LOCAL_SAMPLES)
-                  localRadius = filterSize*0.5f*Magnitude(box.Diagonal())/
-                        sqrt((float)objectSamples);
-                
-                //      cout<<"lr="<<localRadius<<" gr="<<globalRadius<<endl;
-                
-                // now compute the filter size
-                float radius;
-
-                if (localRadius < globalRadius) {
-                  radius = localRadius;
-                  stats.mLocalFilterCount++;
-                } else {
-                  radius = globalRadius;
-                  stats.mGlobalFilterCount++;
-                }
-
-                stats.mAvgFilterRadius += radius;
-                
-                // cout<<"box = "<<box<<endl;
-                //      cout<<"distance = "<<distance<<endl;
-                //      cout<<"radiues = "<<radius<<endl;
-                
-                box.Enlarge(Vector3(radius));
-                
-                objects.clear();
-                // $$ warning collect objects takes only unmailed ones!
-                CollectObjects(box, objects);
-                //      cout<<"collected objects="<<objects.size()<<endl;
-                ObjectContainer::const_iterator noi = objects.begin();
-                for (; noi != objects.end(); ++ noi) {
-                  Intersectable *o = *noi;
-                  // $$ JB warning: pdfs are not correct at this point!   
-                  pvs.AddSampleDirty(o, Limits::Small);
-                }
-          }
-        stats.mAvgFilterRadius /= (stats.mLocalFilterCount + stats.mGlobalFilterCount);
-  }
-  
-  Debug<<" nPvs size = "<<pvs.GetSize()<<endl;
-
-#if !USE_KD_PVS
-  // copy the base pvs to the new pvs
-  pit = basePvs.GetIterator();
-  while (pit.HasMoreEntries()) {                
-        ObjectPvsEntry entry = pit.Next();
-        pvs.AddSampleDirty(entry.mObject, entry.mData.mSumPdf);
-  }
+                pvs.AddSampleDirty(entry.mObject, entry.mData.mSumPdf);
+        }
 #endif
-  viewCell->SetFilteredPvsSize(pvs.GetSize());
-  
-  Intersectable::NewMail();
-  return stats;
+        viewCell->SetFilteredPvsSize(pvs.GetSize());
+
+        Intersectable::NewMail();
+        
+        return stats;
 }
 #endif
 
-  
+
 
 void ViewCellsManager::ExportColor(Exporter *exporter, 
@@ -6227 +6269 @@
 
 #if 0
-                        ////////////////////////////
+                        //////////////
                         // filtered stats
                         sprintf(suffix, "-%09d-eval-filter.log", castSamples);
@@ -6242 +6284 @@
                         cout << "finished in " << timeDiff * 1e-3 << " secs" << endl;
                         cout << "*************************************" << endl;
-
-                        Debug << "statistics computed in " << timeDiff * 1e-3 << " secs" << endl;
+                        Debug << "filtered statistics computed in " << timeDiff * 1e-3 << " secs" << endl;
 #endif
 
@@ -6260 +6301 @@
                                 }
 
-                                cout << "debug entries: " << pvsSize << ", memcost: " << (float)pvsSize * ObjectPvs::GetEntrySize() << endl;
+                                cout << "debug entries: " << pvsSize << ", memcost: " 
+                                         << (float)pvsSize * ObjectPvs::GetEntrySize() << endl;
                         }
                 }
@@ -6271 +6313 @@
 
 
-LocalMergeTree::LocalMergeTree(const ViewCellContainer &viewCells):
-mViewCells(viewCells)
-{
-        mRoot = Subdivide(0, (int)mViewCells.size());
-}
-
-
-void LocalMergeTree::Merge(ObjectPvs &mergedPvs)
-{
-        Merge(mRoot, mergedPvs);
-}
-
-
-void LocalMergeTree::Merge(LocalMergeNode *node, ObjectPvs &mergedPvs)
-{
-        ////////////////
-        //-- pvs is not stored with the interiors => reconstruct
-        if (node->IsLeaf())
-        {
-                LocalMergeLeaf *leaf = dynamic_cast<LocalMergeLeaf *>(node);
-        mergedPvs = leaf->mViewCell->GetPvs();
-        }
-        else
-        {
-                LocalMergeInterior *interior = dynamic_cast<LocalMergeInterior *>(node);
-
-                ObjectPvs leftPvs, rightPvs;
-
-                Merge(interior->mLeft, leftPvs);
-                Merge(interior->mRight, rightPvs);
-
-                ObjectPvs::Merge(mergedPvs, leftPvs, rightPvs);
-        }       
-}
-
-
-LocalMergeNode *LocalMergeTree::Subdivide(const int leftIdx, const int rightIdx)
-{
-        if (leftIdx == rightIdx)
-        {
-                return new LocalMergeLeaf(mViewCells[leftIdx]);
-        }
-
-        LocalMergeInterior *interior = new LocalMergeInterior();
-
-        const int midSplit = (leftIdx + rightIdx) / 2;
-
-        interior->mLeft = Subdivide(leftIdx, midSplit);
-        interior->mRight = Subdivide(midSplit,  rightIdx);
-
-        return interior;
-}
-
-
-
-}
+
+}

GTP/trunk/Lib/Vis/Preprocessing/src/ViewCellsManager.h

@@ -75 +75 @@
 
 
-class LocalMergeLeaf: public LocalMergeNode
-{
-public:
-        LocalMergeLeaf(ViewCell *vc): mViewCell(vc) {};
-        virtual ~LocalMergeLeaf() {};
-        virtual bool IsLeaf() const { return true; }
-
-        ViewCell *mViewCell;
-};
-
-
-class LocalMergeInterior: public LocalMergeNode
-{
-public:
-        
-        virtual ~LocalMergeInterior() {DEL_PTR(mLeft); DEL_PTR(mRight);}
-        virtual bool IsLeaf() const { return false; }
-
-        LocalMergeNode *mLeft;
-        LocalMergeNode *mRight;
-};
-
-
-class LocalMergeTree
-{
-public:
-
-        LocalMergeTree(const ViewCellContainer &viewCells);
-        
-        void Merge(ObjectPvs &mergedPvs);
-
-protected:
-
-        void Merge(LocalMergeNode *node, ObjectPvs &mergedPvs);
-        LocalMergeNode *Subdivide(const int leftIdx, const int rightIdx);
-
-        LocalMergeNode *mRoot;
-        const ViewCellContainer &mViewCells;
-};
-
-
 /**     Manages different higher order operations on the view cells.
 */
@@ -505 +464 @@
         /** Efficiently merges the view cells in the container.
         */
-        void MergeViewCellsEfficient(ObjectPvs &pvs, const ViewCellContainer &viewCells) const;
+        void MergeViewCellsRecursivly(ObjectPvs &pvs, 
+                                                                  const ViewCellContainer &viewCells) const;
 
 
@@ -606 +566 @@
 
 protected:
+
+        void MergeViewCellsRecursivly(ObjectPvs &pvs, 
+                                                                  const ViewCellContainer &viewCells, 
+                                                                  const int leftIdx, 
+                                                                  const int rightIdx) const;
 
         /** Intersects box with the tree and returns the number of intersected boxes.