lib/cpInstances/DataObjects/Mesh.cxx

   1 #include <cpInstances/DataObjects/Mesh.h>
   2
   3 #include <itkMesh.h>
   4 #include <itkLineCell.h>
   5 #include <itkTriangleCell.h>
   6 #include <itkPolygonCell.h>
   7 #include <vtkPolyData.h>
   8
   9 // -------------------------------------------------------------------------
  10 void cpInstances::DataObjects::Mesh::
  11 SetITK( itk::LightObject* o )
  12 {
  13   this->Superclass::SetITK( o );
  14   cpPlugins_Demangle_Mesh_AllMeshes_1( o, _ITK_2_VTK )
  15   {
  16     this->m_VTK = NULL;
  17   }
  18   this->Modified( );
  19 }
  20
  21 // -------------------------------------------------------------------------
  22 void cpInstances::DataObjects::Mesh::
  23 SetVTK( vtkObjectBase* o )
  24 {
  25   vtkPolyData* mesh = dynamic_cast< vtkPolyData* >( o );
  26   if( mesh == NULL )
  27   {
  28     this->m_ITK = NULL;
  29     this->Modified( );
  30     return;
  31
  32   } // fi
  33
  34   if( this->m_VTK.GetPointer( ) != mesh )
  35   {
  36     this->m_VTK = mesh;
  37 #ifdef cpPlugins_PROCESS_DIMS_3
  38     typedef itk::Mesh< double, 3 >      _TMesh;
  39     typedef _TMesh::CellType            _TCell;
  40     typedef _TCell::CellAutoPointer     _TCellAutoPointer;
  41     typedef itk::LineCell< _TCell >     _TLine;
  42     typedef itk::TriangleCell< _TCell > _TTriangle;
  43     typedef itk::PolygonCell< _TCell >  _TPolygon;
  44
  45     // Copy points
  46     _TMesh::Pointer imesh = _TMesh::New( );
  47     double point[ 3 ];
  48     for( long i = 0; i < mesh->GetNumberOfPoints( ); ++i )
  49     {
  50       mesh->GetPoint( i, point );
  51       _TMesh::PointType ipoint;
  52       ipoint[ 0 ] = point[ 0 ];
  53       ipoint[ 1 ] = point[ 1 ];
  54       ipoint[ 2 ] = point[ 2 ];
  55       imesh->SetPoint( i, ipoint );
  56
  57     } // rof
  58
  59     // Copy cells
  60     vtkCellArray* arrays[ 4 ];
  61     arrays[ 0 ] = mesh->GetLines( );
  62     arrays[ 1 ] = mesh->GetPolys( );
  63     arrays[ 2 ] = NULL; // TODO: mesh->GetStrips( );
  64     arrays[ 3 ] = mesh->GetVerts( );
  65
  66     for( unsigned int c = 0; c < 4; c++ )
  67     {
  68       if( arrays[ c ] != NULL )
  69       {
  70         vtkSmartPointer< vtkIdList > ids =
  71           vtkSmartPointer< vtkIdList >::New( );
  72         arrays[ c ]->InitTraversal( );
  73         while( arrays[ c ]->GetNextCell( ids ) == 1 )
  74         {
  75           long nPoints = ids->GetNumberOfIds( );
  76           _TCellAutoPointer icell;
  77           if( nPoints == 2 )
  78           {
  79             icell.TakeOwnership( new _TLine );
  80             icell->SetPointId( 0, ids->GetId( 0 ) );
  81             icell->SetPointId( 1, ids->GetId( 1 ) );
  82           }
  83           else if( nPoints == 3 )
  84           {
  85             icell.TakeOwnership( new _TTriangle );
  86             icell->SetPointId( 0, ids->GetId( 0 ) );
  87             icell->SetPointId( 1, ids->GetId( 1 ) );
  88             icell->SetPointId( 2, ids->GetId( 2 ) );
  89           }
  90           else if( nPoints > 3 )
  91           {
  92             _TPolygon* polygon = new _TPolygon( );
  93             for( long j = 0; j < nPoints; ++j )
  94               polygon->AddPointId( ids->GetId( j ) );
  95             icell.TakeOwnership( polygon );
  96
  97           } // fi
  98           imesh->SetCell( imesh->GetNumberOfCells( ), icell );
  99
 100         } // elihw
 101
 102       } // fi
 103
 104     } // rof
 105     this->m_ITK = imesh;
 106 #endif // cpPlugins_PROCESS_DIMS_3
 107     this->Modified( );
 108
 109   } // fi
 110 }
 111
 112 // -------------------------------------------------------------------------
 113 cpInstances::DataObjects::Mesh::
 114 Mesh( )
 115   : Superclass( )
 116 {
 117 }
 118
 119 // -------------------------------------------------------------------------
 120 cpInstances::DataObjects::Mesh::
 121 ~Mesh( )
 122 {
 123 }
 124
 125 // -------------------------------------------------------------------------
 126 template< class _TMesh >
 127 void cpInstances::DataObjects::Mesh::
 128 _ITK_2_VTK( _TMesh* mesh )
 129 {
 130   long numPoints = mesh->GetNumberOfPoints( );
 131   if( numPoints == 0 )
 132     return;
 133
 134   vtkSmartPointer< vtkPoints > vpoints =
 135     vtkSmartPointer< vtkPoints >::New( );
 136   vpoints->SetNumberOfPoints( numPoints );
 137   auto points = mesh->GetPoints( );
 138
 139   // Copy points
 140   vtkIdType VTKId = 0;
 141   std::map< vtkIdType, long > IndexMap;
 142   for( auto i = points->Begin( ); i != points->End( ); ++i, VTKId++ )
 143   {
 144     IndexMap[ VTKId ] = i->Index( );
 145     if( _TMesh::PointDimension == 2 )
 146       vpoints->SetPoint(
 147         VTKId,
 148         i->Value( )[ 0 ], i->Value( )[ 1 ], 0
 149         );
 150     else if( _TMesh::PointDimension == 3 )
 151       vpoints->SetPoint(
 152         VTKId,
 153         i->Value( )[ 0 ], i->Value( )[ 1 ], i->Value( )[ 2 ]
 154         );
 155
 156   } // rof
 157
 158   // Copy cells
 159   vtkSmartPointer< vtkCellArray > vcells =
 160     vtkSmartPointer< vtkCellArray >::New( );
 161   auto cells = mesh->GetCells( );
 162   for( auto j = cells->Begin( ); j != cells->End( ); ++j )
 163   {
 164     auto cell = j->Value( );
 165     vcells->InsertNextCell( cell->GetNumberOfPoints( ) );
 166     for( auto k = cell->PointIdsBegin( ); k != cell->PointIdsEnd( ); ++k )
 167       vcells->InsertCellPoint( IndexMap[ *k ] );
 168
 169   } // rof
 170
 171   // Final assignations
 172   vtkSmartPointer< vtkPolyData > vmesh =
 173     vtkSmartPointer< vtkPolyData >::New( );
 174   vmesh->SetPoints( vpoints );
 175   vmesh->SetPolys( vcells );
 176   this->m_VTK = vmesh;
 177   this->Modified( );
 178 }
 179
 180 // eof - $RCSfile$