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itkQuadEdgeMeshEdgeMergeDecimationFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkQuadEdgeMeshEdgeMergeDecimationFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-02-11 15:05:41 $
00007   Version:   $Revision: 1.3 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 
00018 #ifndef __itkQuadEdgeMeshEdgeMergeDecimationFilter_h
00019 #define __itkQuadEdgeMeshEdgeMergeDecimationFilter_h
00020 
00021 #include <list>
00022 #include <map>
00023 #include <algorithm>
00024 
00025 #include <itkQuadEdgeMeshEulerOperatorJoinVertexFunction.h>
00026 #include <itkQuadEdgeMeshPolygonCell.h>
00027 
00028 #include "itkQuadEdgeMeshDecimationFilter.h"
00029 #include "itkPriorityQueueContainer.h"
00030 #include "itkTriangleHelper.h"
00031 
00032 namespace itk
00033 {
00038 template< class TInput, class TOutput, class TCriterion >
00039 class QuadEdgeMeshEdgeMergeDecimationFilter :
00040       public QuadEdgeMeshDecimationFilter< TInput, TOutput, TCriterion >
00041 {
00042 public:
00043   typedef QuadEdgeMeshEdgeMergeDecimationFilter             Self;
00044   typedef SmartPointer< Self >                              Pointer;
00045   typedef SmartPointer< const Self >                        ConstPointer;
00046   typedef QuadEdgeMeshDecimationFilter< 
00047     TInput, TOutput, TCriterion >                           Superclass;
00048 
00050   itkTypeMacro( QuadEdgeMeshEdgeMergeDecimationFilter, QuadEdgeMeshDecimationFilter );
00051 
00052   typedef TInput                                            InputMeshType;
00053   typedef typename InputMeshType::Pointer                   InputMeshPointer;
00054 
00055   typedef TOutput                                           OutputMeshType;
00056   typedef typename OutputMeshType::Pointer                  OutputMeshPointer;
00057   typedef typename OutputMeshType::PointIdentifier          OutputPointIdentifier;
00058   typedef typename OutputMeshType::PointType                OutputPointType;
00059   typedef typename OutputPointType::VectorType              OutputVectorType;
00060   typedef typename OutputMeshType::QEType                   OutputQEType;
00061   typedef typename OutputMeshType::EdgeCellType             OutputEdgeCellType;
00062   typedef typename OutputMeshType::CellType                 OutputCellType;
00063   typedef typename OutputMeshType::CellIdentifier           OutputCellIdentifier;
00064   typedef typename OutputMeshType::CellsContainerPointer    OutputCellsContainerPointer;
00065   typedef typename OutputMeshType::CellsContainerIterator   OutputCellsContainerIterator;
00066 
00067   typedef QuadEdgeMeshPolygonCell< OutputCellType >         OutputPolygonType;
00068 
00069   typedef TCriterion                                        CriterionType;
00070   typedef typename CriterionType::Pointer                   CriterionPointer;
00071   typedef typename CriterionType::MeasureType               MeasureType;
00072   typedef typename CriterionType::PriorityType              PriorityType;
00073   typedef typename CriterionType::PriorityQueueWrapperType  PriorityQueueItemType;
00074     
00075   typedef PriorityQueueContainer< PriorityQueueItemType*,
00076     ElementWrapperPointerInterface< PriorityQueueItemType* >,
00077     PriorityType >                                          PriorityQueueType;
00078   typedef typename PriorityQueueType::Pointer               PriorityQueuePointer;
00079 
00080   typedef std::map< OutputQEType*, PriorityQueueItemType* > QueueMapType;
00081   typedef typename QueueMapType::iterator                   QueueMapIterator;
00082 
00083   typedef QuadEdgeMeshEulerOperatorJoinVertexFunction< 
00084     OutputMeshType, OutputQEType >                          OperatorType;
00085   typedef typename OperatorType::Pointer                    OperatorPointer;
00086 
00087 protected:
00088 
00089   QuadEdgeMeshEdgeMergeDecimationFilter();
00090   virtual ~QuadEdgeMeshEdgeMergeDecimationFilter();
00091 
00092   bool m_Relocate;
00093   bool m_CheckOrientation;
00094 
00095   PriorityQueuePointer    m_PriorityQueue;
00096   QueueMapType            m_QueueMapper;
00097   OutputQEType*           m_Element;
00098   PriorityType            m_Priority;
00099   OperatorPointer         m_JoinVertexFunction;
00100 
00106   virtual MeasureType MeasureEdge( OutputQEType* iEdge ) = 0;
00107 
00111   void FillPriorityQueue();
00112 
00117   void PushElement( OutputQEType* iEdge );
00118 
00124   bool IsEdgeOKToBeProcessed( OutputQEType* iEdge );
00125 
00129   void Extract();
00130 
00135   void DeleteElement( OutputQEType* iEdge );
00136 
00137   virtual void DeletePoint( const OutputPointIdentifier& iIdToBeDeleted,
00138                             const OutputPointIdentifier& iRemaing );
00139 
00145   virtual void PushOrUpdateElement( OutputQEType* iEdge );
00146 
00150   virtual void JoinVertexFailed( );
00151 
00155   virtual bool ProcessWithoutAnyTopologicalGuarantee();
00156 
00161   virtual unsigned int CheckQEProcessingStatus( );
00162 
00167   virtual bool ProcessWithTopologicalGuarantee();
00168 
00172   size_t NumberOfCommonVerticesIn0Ring( );
00173 
00177   void RemoveSamosa();
00178 
00183   void TagElementOut( OutputQEType* iEdge );
00184 
00188   void RemoveEye();
00189 
00195   virtual OutputPointType Relocate( OutputQEType* iEdge ) = 0;
00196 
00201   bool CheckOrientation( OutputQEType* iEdge,
00202     const OutputPointIdentifier& iId,
00203     const OutputPointType& iPt )
00204     {
00205     OutputMeshPointer output = this->GetOutput();
00206     OutputCellsContainerPointer cells = output->GetCells();
00208 
00209     std::list< OutputCellIdentifier > r1, r2, elements_to_be_tested;
00210     OutputQEType* qe = iEdge;
00211     OutputQEType* qe_it = qe->GetOnext();
00212 
00213     do
00214       {
00215       r1.push_back( qe_it->GetLeft() );
00216       qe_it = qe_it->GetOnext();
00217       }while( qe_it != qe );
00218 
00219     qe = iEdge->GetSym();
00220     qe_it = qe->GetOnext();
00221 
00222     do
00223       {
00224       r2.push_back( qe_it->GetLeft() );
00225       qe_it = qe_it->GetOnext();
00226       }while( qe_it != qe );
00227 
00228     r1.sort();
00229     r2.sort();
00230 
00231     std::set_symmetric_difference( r1.begin(), r1.end(),
00232       r2.begin(), r2.end(),
00233       std::back_inserter( elements_to_be_tested ) );
00234 
00235     typename std::list< OutputCellIdentifier >::iterator
00236       it = elements_to_be_tested.begin();
00237 
00238     typedef TriangleHelper< OutputPointType > TriangleType;
00239 
00240     bool orientation_ok( true );
00241     OutputCellIdentifier c_id( 0 );
00242     OutputPolygonType* poly;
00243     OutputPointIdentifier p_id;
00244 
00245     int k( 0 ), replace_k( 0 );
00246     OutputPointType pt[3];
00247 
00248     OutputVectorType n_bef, n_aft;
00249 
00250     while( ( it != elements_to_be_tested.end() ) && orientation_ok )
00251       {
00252       c_id = *it;
00253       poly = dynamic_cast< OutputPolygonType* >( cells->GetElement( c_id ) );
00254 
00255       qe = poly->GetEdgeRingEntry( );
00256       qe_it = qe;
00257       k = 0;
00258           
00259       do
00260         {
00261         p_id = qe_it->GetOrigin( );
00262         if( p_id == iId )
00263           replace_k = k;
00264         pt[k++] = output->GetPoint( p_id );
00265         qe_it = qe_it->GetLnext( );
00266         }while( qe_it != qe );
00267 
00268       n_bef = TriangleType::ComputeNormal( pt[0], pt[1], pt[2] );
00269       switch( replace_k )
00270         {
00271         default:
00272         case 0:
00273           n_aft = TriangleType::ComputeNormal( iPt, pt[1], pt[2] );
00274           break;
00275         case 1:
00276           n_aft = TriangleType::ComputeNormal( pt[0], iPt, pt[2] );
00277           break;
00278         case 2:
00279           n_aft = TriangleType::ComputeNormal( pt[0], pt[1], iPt );
00280           break;
00281         }
00282 
00283       orientation_ok = ( n_bef * n_aft ) < 0.;
00284       ++it;
00285       }
00286 
00287     return orientation_ok;
00288     }
00289 
00294   bool IsCriterionSatisfied();
00295 
00296 private:
00297   QuadEdgeMeshEdgeMergeDecimationFilter( const Self& );
00298   void operator = ( const Self& );
00299 };
00300 }
00301 
00302 #include "itkQuadEdgeMeshEdgeMergeDecimationFilter.txx"
00303 #endif
00304 

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