+#include <vtkCellArray.h>
+#include <vtkPolyDataMapper.h>
+#include <vtkPoints.h>
+#include <vtkPointData.h>
+#include <vtkProperty.h>
+#include <vtkRenderer.h>
+#include <vtkRendererCollection.h>
+
+// -------------------------------------------------------------------------
+template< class F, class R >
+void fpa::VTK::Image3DObserver< F, R >::
+SetRenderWindow( R* rw )
+{
+ this->m_RenderWindow = rw;
+}
+
+// -------------------------------------------------------------------------
+template< class F, class R >
+void fpa::VTK::Image3DObserver< F, R >::
+SetPixel(
+ typename TImage::IndexType idx,
+ unsigned char red,
+ unsigned char green,
+ unsigned char blue,
+ unsigned char alpha
+ )
+{
+ std::cout << idx << std::endl;
+ this->m_Stencil->SetScalarComponentFromDouble
+ ( idx[ 0 ], idx[ 1 ], idx[ 2 ], 0, red );
+ this->m_Stencil->SetScalarComponentFromDouble
+ ( idx[ 0 ], idx[ 1 ], idx[ 2 ], 1, green );
+ this->m_Stencil->SetScalarComponentFromDouble
+ ( idx[ 0 ], idx[ 1 ], idx[ 2 ], 2, blue );
+ this->m_Stencil->SetScalarComponentFromDouble
+ ( idx[ 0 ], idx[ 1 ], idx[ 2 ], 3, alpha );
+
+ int ijk[ 3 ];
+ ijk[ 0 ] = idx[ 0 ];
+ ijk[ 1 ] = idx[ 1 ];
+ ijk[ 2 ] = idx[ 2 ];
+ long id = this->m_Stencil->ComputePointId( ijk );
+ vtkUnsignedCharArray* pd_data =
+ dynamic_cast< vtkUnsignedCharArray* >(
+ this->m_PolyData->GetPointData( )->GetScalars( )
+ );
+ pd_data->SetTuple4( id, red, green, blue, alpha );
+ this->m_Stencil->Modified( );
+ this->m_PolyData->Modified( );
+ this->m_PolyDataMapper->Modified( );
+ this->m_PolyDataActor->Modified( );
+}
+
+// -------------------------------------------------------------------------
+template< class F, class R >
+void fpa::VTK::Image3DObserver< F, R >::
+Render( )
+{
+ if( this->m_RenderWindow != NULL )
+ this->m_RenderWindow->Render( );
+}
+
+// -------------------------------------------------------------------------
+template< class F, class R >
+void fpa::VTK::Image3DObserver< F, R >::
+Execute( const itk::Object* c, const itk::EventObject& e )
+{
+ typedef typename F::TStartEvent _TStartEvent;
+ typedef typename F::TStartLoopEvent _TStartLoopEvent;
+ typedef typename F::TEndEvent _TEndEvent;
+ typedef typename F::TEndLoopEvent _TEndLoopEvent;
+ typedef typename F::TAliveEvent _TAliveEvent;
+ typedef typename F::TFrontEvent _TFrontEvent;
+ typedef typename F::TFreezeEvent _TFreezeEvent;
+
+ typedef typename F::TStartBacktrackingEvent _TStartBacktrackingEvent;
+ typedef typename F::TEndBacktrackingEvent _TEndBacktrackingEvent;
+ typedef typename F::TBacktrackingEvent _TBacktrackingEvent;
+
+ static unsigned char Colors[][4] =
+ {
+ { 0, 0, 127, 127 },
+ { 0, 127, 127, 127 },
+ { 127, 0, 127, 127 },
+ { 127, 127, 0, 127 },
+ { 0, 0, 63, 127 },
+ { 0, 63, 63, 127 },
+ { 63, 0, 63, 127 },
+ { 63, 63, 0, 127 },
+ { 63, 63, 127, 127 },
+ { 63, 127, 127, 127 },
+ { 127, 63, 127, 127 },
+ { 127, 127, 63, 127 },
+ { 127, 127, 63, 127 },
+ { 127, 63, 63, 127 },
+ { 63, 127, 63, 127 },
+ { 63, 63, 127, 127 }
+ };
+
+ const F* filter = dynamic_cast< const F* >( c );
+ if( this->m_RenderWindow == NULL || filter == NULL )
+ return;
+
+ const _TStartEvent* startEvt = dynamic_cast< const _TStartEvent* >( &e );
+ const _TStartBacktrackingEvent* startBackEvt =
+ dynamic_cast< const _TStartBacktrackingEvent* >( &e );
+ if( startEvt != NULL || startBackEvt != NULL )
+ {
+ const typename F::TInputImage* img = filter->GetInput( );
+ unsigned int minD = F::TInputImage::ImageDimension;
+ minD = ( minD < 3 )? minD: 3;
+
+ int e[ 6 ] = { 0 };
+ typename F::TInputImage::RegionType reg = img->GetRequestedRegion( );
+ for( unsigned int i = 0; i < minD; i++ )
+ {
+ e[ ( i << 1 ) + 0 ] = reg.GetIndex( )[ i ];
+ e[ ( i << 1 ) + 1 ] = reg.GetIndex( )[ i ] + reg.GetSize( )[ i ] - 1;
+
+ } // rof
+
+ typename F::TInputImage::SpacingType spac = img->GetSpacing( );
+ double s[ 3 ] = { 1, 1, 1 };
+ for( unsigned int i = 0; i < minD; i++ )
+ s[ i ] = double( spac[ i ] );
+
+ typename F::TInputImage::PointType orig = img->GetOrigin( );
+ double o[ 3 ] = { 0 };
+ for( unsigned int i = 0; i < minD; i++ )
+ o[ i ] = double( orig[ i ] );
+
+ this->m_Stencil->SetExtent( e );
+ this->m_Stencil->SetSpacing( s );
+ this->m_Stencil->SetOrigin( o );
+ this->m_Stencil->AllocateScalars( VTK_UNSIGNED_CHAR, 4 );
+ for( unsigned int i = 0; i < 3; i++ )
+ this->m_Stencil->GetPointData( )->
+ GetScalars( )->FillComponent( i, 255 );
+ this->m_Stencil->GetPointData( )->GetScalars( )->FillComponent( 3, 0 );
+
+ vtkSmartPointer< vtkPoints > pd_points =
+ vtkSmartPointer< vtkPoints >::New( );
+ vtkSmartPointer< vtkCellArray > pd_verts =
+ vtkSmartPointer< vtkCellArray >::New( );
+ vtkSmartPointer< vtkUnsignedCharArray > pd_data =
+ vtkSmartPointer< vtkUnsignedCharArray >::New( );
+ long nPoints = this->m_Stencil->GetNumberOfPoints( );
+
+ pd_data->SetNumberOfComponents( 4 );
+ pd_data->SetNumberOfTuples( nPoints );
+ pd_points->SetNumberOfPoints( nPoints );
+ double point[ 3 ];
+ for( long pId = 0; pId < nPoints; ++pId )
+ {
+ this->m_Stencil->GetPoint( pId, point );
+ pd_points->InsertNextPoint( point );
+ pd_verts->InsertNextCell( 1 );
+ pd_verts->InsertCellPoint( pId );
+ pd_data->SetTuple4( pId, 0, 0, 0, 0 );
+
+ } // rof
+ this->m_PolyData->SetPoints( pd_points );
+ this->m_PolyData->SetVerts( pd_verts );
+ this->m_PolyData->GetPointData( )->SetScalars( pd_data );
+
+ this->m_PolyDataMapper->SetInputData( this->m_PolyData );
+ this->m_PolyDataActor->SetMapper( this->m_PolyDataMapper );