wxVtkMPR3DView.cxx

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#include "wxVtkMPR3DView.h"

#include "vtkDataSetMapper.h"
#include "vtkPlaneSource.h"
#include "vtkProbeFilter.h"
#include "vtkStructuredPoints.h"
#include "vtkMetaImageWriter.h"
#include "vtkDataSetMapper.h"
#include "vtkImageChangeInformation.h"
#include "vtkPointData.h"
#include "vtkWindowLevelLookupTable.h"
#include "vtkPlane.h"
#include "vtkCutter.h"
#include "vtkTransform.h"
#include "vtkmyPWCallback_3DPointWidget.h"
#include "vtkProperty.h"
#include "vtkCellPicker.h"

wxVtkMPR3DView::wxVtkMPR3DView( wxVtk3DBaseView *wxvtk3Dbaseview )
{
        _wxvtk3Dbaseview                        =       wxvtk3Dbaseview;
        _vtkmpr3Ddataviewer                     =       NULL;
        _wxvtkmpr3DviewCntrlPanel       =       NULL;   
        //_myCallback                           =       NULL;
        _pointWidget                            =       NULL;
        _planeWidget                            =       NULL;
        _vtkplane                                       =       NULL;
        _probe                                          =       NULL;
        _contourMapper                          =       NULL;
        
        _planeWidgetX = 0;
        _planeWidgetY = 0;
        _planeWidgetZ = 0;
        //EED Fev 3 2010
        //Free Planes 
}


//-------------------------------------------------------------------
wxVtkMPR3DView::~wxVtkMPR3DView()
{
        VisiblePointWidget( false );
        VisiblePlaneWidget( false );
        
        if(_pointWidget!=NULL){
                _pointWidget->Delete();
        }
        if(_planeWidget!=NULL){
                _planeWidget->Delete();
        }
        
        if(_vtkplane!=NULL){
                _vtkplane->Delete();            
                _probe->Delete();
                _contourMapper->Delete();                       
                _contourPlaneActor->Delete();           
        }
        
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::RemoveActor(vtkActor* actor)
{       
        _wxvtk3Dbaseview->GetRenderer()->RemoveActor(actor);    
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::ResetCamera(int* ext, double* origin,double* spc)
{
        if(ext == NULL){
                _wxvtk3Dbaseview->GetRenderer()->ResetCamera ();        
                _wxvtk3Dbaseview->GetCamera()->Dolly(1.5);      
        }else{
                /*double x = (spc[0])*(origin[0]+(((double)ext[1]-(double)ext[0])/2.0));                
                double y = (spc[1])*(origin[1]+(double)ext[3]);
                double z = (spc[2])*(origin[2]+(((double)ext[5]-(double)ext[4])/2.0));*/
                /*double x0=(spc[0])*((double)ext[0]+origin[0]);
                double x1=(spc[0])*((double)ext[1]+origin[0]);
                double y0=(spc[1])*((double)ext[2]+origin[1]);
                double y1=(spc[1])*((double)ext[3]+origin[1]);
                double z0=(spc[2])*((double)ext[4]+origin[2]);
                double z1=(spc[2])*((double)ext[5]+origin[2]);*/
                double x0=(spc[0])*((double)ext[0]);
                double x1=(spc[0])*((double)ext[1]);
                double y0=(spc[1])*((double)ext[2]);
                double y1=(spc[1])*((double)ext[3]);
                double z0=(spc[2])*((double)ext[4]);
                double z1=(spc[2])*((double)ext[5]);
                
                _wxvtk3Dbaseview->GetRenderer()->ResetCamera(x0,x1,y0,y1,z0,z1);
                //_wxvtk3Dbaseview->GetCamera()->SetPosition(x,y,z);
                _wxvtk3Dbaseview->GetCamera()->Dolly(1.5);      
        }
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::Configure(){
        
        
        vtkImageData *imageData = GetVtkMPR3DDataViewer()->GetVtkMPRBaseData()->GetImageData();

        _wxvtk3Dbaseview->Configure();
        _wxvtkmpr3DviewCntrlPanel->UpdateControlPanel();
        
//EED 27 Mai 2009 
//      _wxvtk3Dbaseview->GetRenderer()->Clear();    
        
        // Actors are added to the renderer. 
        vtkActor* _outlineActor = _vtkmpr3Ddataviewer->GetOutlineActor();
        _wxvtk3Dbaseview->GetRenderer()->AddActor( _outlineActor );                     
//      _wxvtk3Dbaseview->GetRenderer()->AddActor( _vtkmpr3Ddataviewer->GetImageActor(0)  );    // _saggital
//      _wxvtk3Dbaseview->GetRenderer()->AddActor( _vtkmpr3Ddataviewer->GetImageActor(1)  );    // _axial
//      _wxvtk3Dbaseview->GetRenderer()->AddActor( _vtkmpr3Ddataviewer->GetImageActor(2)  );    // _coronal


        // An initial camera view is created.  The Dolly() method moves 
        // the camera towards the FocalPoint, thereby enlarging the image.      
        _wxvtk3Dbaseview->GetRenderer()->SetActiveCamera(_wxvtk3Dbaseview->GetCamera());
        this->ResetCamera();
        

        // Set a background color for the renderer and set the size of the
        // render window (expressed in pixels).
        _wxvtk3Dbaseview->GetRenderer()->SetBackground( 0.36 , 0.36 , 0.36 );
        _wxvtk3Dbaseview->GetRenWin()->SetSize(400, 400);

        // Note that when camera movement occurs (as it does in the Dolly()
        // method), the clipping planes often need adjusting. Clipping planes
        // consist of two planes: near and far along the view direction. The 
        // near plane clips out objects in front of the plane; the far plane
        // clips out objects behind the plane. This way only what is drawn
        // between the planes is actually rendered.
        _wxvtk3Dbaseview->GetRenderer()->ResetCameraClippingRange();


        // vtkPointWidget
        //if(_myCallback!=NULL){
                //_myCallback->Delete();

        //}
        vtkmyPWCallback_3DPointWidget *_myCallback = vtkmyPWCallback_3DPointWidget::New();
        _myCallback->SetWxVtkMPR3DView(this);
        
        
        if(imageData){
                if(_pointWidget==NULL){
                        _pointWidget = vtkPointWidget::New();
                }
                _pointWidget->SetInput( imageData );
                _myCallback->SetVtkPointWidget(_pointWidget);
                _pointWidget->SetInteractor( GetWxvtk3Dbaseview()->GetWxVTKRenderWindowInteractor() ); 
                _pointWidget->AllOff();
                _pointWidget->PlaceWidget();
                
                _pointWidget->AddObserver(vtkCommand::InteractionEvent,_myCallback);
                
                
                if(_planeWidget==NULL)
                {
                        _planeWidget = vtkPlaneWidget::New();
                }
                _planeWidget->SetInput( imageData );
                
                _myCallback->SetVtkPlaneWidget(_planeWidget);

                _planeWidget->NormalToXAxisOn();
                _planeWidget->SetResolution(50);
                _planeWidget->SetRepresentationToOutline();
                
                int dim[3];
        
                imageData->GetDimensions(dim);
                int px=(dim[0]/2);
                int py=(dim[1]/2);
                int pz=(dim[2]/2);
                int dd=20;
                _planeWidget->PlaceWidget( px-dd , px+dd , py-dd , py+dd , pz-dd , pz+dd );
                
                if(_vtkplane==NULL){
                        _vtkplane = vtkPolyData::New();
                        
                        _probe = vtkProbeFilter::New();
                        _probe->SetInput(_vtkplane);

                        _contourMapper = vtkPolyDataMapper::New();
                        
                        _contourMapper->SetInput( _probe->GetPolyDataOutput() );

                        _contourPlaneActor = vtkActor::New();
                        _contourPlaneActor->SetMapper(_contourMapper);

                        _contourPlaneActor->VisibilityOff();

                        _planeWidget->SetInteractor( GetWxvtk3Dbaseview()->GetWxVTKRenderWindowInteractor() );
                        _planeWidget->AddObserver(vtkCommand::InteractionEvent,_myCallback);

                        _planeWidget->Off();
                        _wxvtk3Dbaseview->GetRenderer()->AddActor( _contourPlaneActor );        

                }

                _planeWidget->GetPolyData(_vtkplane);
                _probe->SetSource( imageData );
                _contourMapper->SetScalarRange( imageData->GetScalarRange() );
                
                
                ConfigureFreePlanes();
        }
        
//      _pointWidget->SetPosition( x,y,z ); 
        
//EED01 29Mars2009
// MACOS probleme vtk-window out of wx-window   
//      _pointWidget->On();
        
        


// PlaneWidget
        
        
        
        
        
        


        
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::ConfigureFreePlanes()
{

        // The shared picker enables us to use 3 planes at one time
        // and gets the picking order right
        vtkCellPicker* picker = vtkCellPicker::New();
        picker->SetTolerance(0.005);

        // The 3 image plane widgets 
        _planeWidgetX = GetPlaneWidget('x', 1, 0, 0, picker);
        _planeWidgetY = GetPlaneWidget('y', 1, 1, 0, picker);
        _planeWidgetZ = GetPlaneWidget('z', 0, 0, 1, picker);     
        
        _planeWidgetY->SetLookupTable(_planeWidgetX->GetLookupTable());
        _planeWidgetZ->SetLookupTable(_planeWidgetX->GetLookupTable());
        
        picker->UnRegister(NULL);
        
}

//-------------------------------------------------------------------
vtkImagePlaneWidget* wxVtkMPR3DView::GetPlaneWidget(unsigned char activationkey, double r, double g, double b, vtkCellPicker* picker)
{
        vtkProperty* prop1 = 0;         
        vtkImagePlaneWidget* planeWidget = 0;
        planeWidget = vtkImagePlaneWidget::New();
        planeWidget->EnabledOff();
        planeWidget->SetInteractor( GetWxvtk3Dbaseview()->GetWxVTKRenderWindowInteractor() );
        vtkImageData *image = GetVtkMPR3DDataViewer()->GetVtkMPRBaseData()->GetImageData();
        int xMin = 0, xMax = 0, yMin = 0, yMax = 0, zMin = 0, zMax = 0;
        double xSpacing = 0, ySpacing = 0, zSpacing = 0;
        if(image){
                planeWidget->SetInput( image );
                image->GetExtent(xMin, xMax, yMin, yMax, zMin, zMax);   
                image->GetSpacing(xSpacing, ySpacing, zSpacing);
        }

        
        
        
                
        
        if (activationkey=='x')
        {
                planeWidget->SetPlaneOrientationToXAxes();       
                planeWidget->SetSlicePosition((xMax+xMin)/2.*xSpacing);
        }
        
        if (activationkey=='y')
        {
                planeWidget->SetPlaneOrientationToYAxes();
                planeWidget->SetSlicePosition((yMax+yMin)/2.*ySpacing);
        }
                
        if (activationkey=='z')
        {
                planeWidget->SetPlaneOrientationToZAxes();
                planeWidget->SetSlicePosition((zMax+zMin)/2.*zSpacing);
        }
        
        planeWidget->DisplayTextOn();
        planeWidget->SetPicker(picker);
        planeWidget->SetKeyPressActivationValue(activationkey);
        prop1 = planeWidget->GetPlaneProperty();
        prop1->SetColor(r, g, b);
        return planeWidget;
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::FreePlaneVisible(int plane, bool ok)
{
        if(_planeWidgetX){
                if ((plane==1) && (ok==true)) _planeWidgetX->EnabledOn();
                if ((plane==2) && (ok==true)) _planeWidgetY->EnabledOn();
                if ((plane==3) && (ok==true)) _planeWidgetZ->EnabledOn();
                if ((plane==1) && (ok==false)) _planeWidgetX->EnabledOff();
                if ((plane==2) && (ok==false)) _planeWidgetY->EnabledOff();
                if ((plane==3) && (ok==false)) _planeWidgetZ->EnabledOff();
        }
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::FreePlaneInteraction(bool ok)
{
        if(_planeWidgetX){
                if (ok==true)
                {
                        _planeWidgetX->InteractionOn();
                        _planeWidgetY->InteractionOn();
                        _planeWidgetZ->InteractionOn();
                } else {
                        _planeWidgetX->InteractionOff();
                        _planeWidgetY->InteractionOff();
                        _planeWidgetZ->InteractionOff();
                }
        }
}


//-------------------------------------------------------------------
void wxVtkMPR3DView::setColorTransferFunction(vtkColorTransferFunction* colortable)
{
        GetVtkMPR3DDataViewer ()->setColorTransferFunction(colortable); 
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::Refresh()   // virtual
{
        _vtkmpr3Ddataviewer     ->      Refresh();
        if (_wxvtkmpr3DviewCntrlPanel!=NULL)
        {
                _wxvtkmpr3DviewCntrlPanel->Refresh();
        }

}

//-------------------------------------------------------------------
void wxVtkMPR3DView::RefreshView()   // virtual
{
        double spc[3];
        vtkImageData *image = GetVtkMPR3DDataViewer()->GetVtkMPRBaseData()->GetImageData();
        
        if(image){
                image->GetSpacing(spc);
        }else{
                spc[0] = 0;
                spc[1] = 0;
                spc[2] = 0;
        }
        //this->GetVtkMPR3DDataViewer()->GetVtkMPRBaseData()->GetImageData()->GetSpacing(spc);

        //double nx=1,ny=0,nz=0; // JPRx
        Refresh();
        double x=GetVtkMPR3DDataViewer ()->GetVtkMPRBaseData()->GetX();
        double y=GetVtkMPR3DDataViewer ()->GetVtkMPRBaseData()->GetY();
        double z=GetVtkMPR3DDataViewer ()->GetVtkMPRBaseData()->GetZ();

        x=x*spc[0];
        y=y*spc[1];
        z=z*spc[2];

        if(_pointWidget){
                _pointWidget->SetPosition( x,y,z ); 


                double in[3]; 
                double normal[3];
                vtkTransform *transform = GetVtkMPR3DDataViewer ()->GetVtkMPRBaseData()->GetTransformOrientation();
                in[0]=1;                in[1]=0;                        in[2]=0;
                transform->TransformPoint(in,normal);
                _planeWidget->SetNormal( normal[0],normal[1],normal[2] );


                _planeWidget->SetCenter( x,y,z );
                _planeWidget->UpdatePlacement();
                _planeWidget->GetPolyData(_vtkplane);
        }
}
//-------------------------------------------------------------------
wxPanel* wxVtkMPR3DView::CreateControlPanel(wxWindow *parent, bool align)
{
        _wxvtkmpr3DviewCntrlPanel = new wxVtkMPR3DViewCntrlPanel(parent,this, align);
        return _wxvtkmpr3DviewCntrlPanel;
}
//-------------------------------------------------------------------
vtkMPR3DDataViewer* wxVtkMPR3DView::GetVtkMPR3DDataViewer() 
{
        return _vtkmpr3Ddataviewer; 
}
//-------------------------------------------------------------------
wxVtk3DBaseView* wxVtkMPR3DView::GetWxvtk3Dbaseview() throw (char*)
{
        if(_wxvtk3Dbaseview==NULL){
                throw "wxVtk3DBaseView* wxVtkMPR3DView::GetWxvtk3Dbaseview() _wxvtk3Dbaseview=NULL";
        }
        return _wxvtk3Dbaseview;
}
//-------------------------------------------------------------------

//-------------------------------------------------------------------
void wxVtkMPR3DView::VisibleImageActor(int idPosition, bool visible){
        /*if(visible == false)
                printf("CPR: wxVtkMPR3DView::VisibleImageActor-> visibleActor == false \n");
        else
        {
                printf("CPR: wxVtkMPR3DView::VisibleImageActor-> visibleActor == true\n");
                printf("CPR: wxVtkMPR3DView::VisibleImageActor-> idPosition == %d\n", idPosition);
        }
        */
        if (visible!=_vtkmpr3Ddataviewer->GetVisiblePosition(idPosition)){
                if (visible==false){
                        _wxvtk3Dbaseview->GetRenderer()->RemoveActor( _vtkmpr3Ddataviewer->GetImageActor(idPosition)  );        
                } else {
                        _wxvtk3Dbaseview->GetRenderer()->AddActor( _vtkmpr3Ddataviewer->GetImageActor(idPosition)  );   
                }
                _vtkmpr3Ddataviewer->SetVisiblePosition(idPosition,visible);
        }
}


//-------------------------------------------------------------------
void wxVtkMPR3DView::VisiblePointWidget( bool visible )
{
        if(_pointWidget){
                if (visible==true)
                {
                        _pointWidget->On();
                } else {
                        _pointWidget->Off();
                }
        }
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::VisiblePlaneWidget( bool visible )
{
        if(_planeWidget){
                if (visible==true)
                {
                        _planeWidget->On();
                        _contourPlaneActor->VisibilityOn();

                } else {
                        _planeWidget->Off();
                        _contourPlaneActor->VisibilityOff();
                }
        }
}

//CPR: Method added 30 Nov 2009
void wxVtkMPR3DView::showOutlineActor(bool value)
{
        vtkActor* _outlineActor = _vtkmpr3Ddataviewer->GetOutlineActor();
        if(value == true)
        {
                _wxvtk3Dbaseview->GetRenderer()->AddActor( _outlineActor );     
        }
        else
        {
                _wxvtk3Dbaseview->GetRenderer()->RemoveActor( _outlineActor );  
        }
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::SetVtkMPR3DDataViewer(vtkMPR3DDataViewer *vtkmpr3Ddataviewer)
{
        _vtkmpr3Ddataviewer = vtkmpr3Ddataviewer;
}

//-------------------------------------------------------------------
void wxVtkMPR3DView::InitOrientationPointWidget()
{
        this->_planeWidget->SetNormal(1,0,0);           
}




//-------------------------------------------------------------------
// EED 25 Janvier 2007 testLoic
void wxVtkMPR3DView::TestLoic1()
{

        int sizeIma     = 128;
  double dimIma = sizeIma*2;

        vtkImageData *vtkimagedata =  this->GetVtkMPR3DDataViewer()->GetVtkMPRBaseData()->GetImageData();

        double spc[3];
        vtkimagedata->GetSpacing(spc);

        vtkimagedata->Update();


         double p[3], n[3];
     this->_planeWidget->GetOrigin(p);
     this->_planeWidget->GetNormal(n);



    vtkPlaneSource* pSource = vtkPlaneSource::New( );
    pSource->SetResolution( sizeIma - 1, sizeIma - 1 );
    pSource->SetOrigin( p[ 0 ], p[ 1 ], p[ 2 ] );
    pSource->SetPoint1( p[ 0 ] + dimIma - 1.0, p[ 1 ], p[ 2 ] );
    pSource->SetPoint2( p[ 0 ], p[ 1 ]+ dimIma - 1.0 , p[ 2 ] );
    pSource->Update( );
    pSource->SetCenter( p[ 0 ], p[ 1 ], p[ 2 ] );
    pSource->SetNormal( n[ 0 ], n[ 1 ], n[ 2 ] );
    pSource->Update( );

    vtkProbeFilter* slices = vtkProbeFilter::New();
    slices->SetInput( ( vtkDataSet* )pSource->GetOutput( ) );
    slices->SetSource( vtkimagedata );
    slices->Update( );
    pSource->Delete( );

        vtkStructuredPoints   *stPoints = vtkStructuredPoints::New();
        stPoints -> GetPointData( )->SetScalars(  slices->GetOutput()->GetPointData()->GetScalars()  );
        stPoints -> SetDimensions( sizeIma, sizeIma, 1 );
        stPoints -> SetScalarType( vtkimagedata->GetScalarType() );
        stPoints -> SetScalarTypeToShort();
        stPoints -> Update();

        vtkImageChangeInformation  *change = vtkImageChangeInformation ::New();
        change    -> SetInput( stPoints );  
        change    -> Update();    //important

        double _range[2];
        vtkimagedata->GetScalarRange(_range);
   vtkWindowLevelLookupTable *_bwlookup = vtkWindowLevelLookupTable::New( );
   _bwlookup->SetHueRange( 0 , 1 );
   _bwlookup->SetNumberOfColors( (int)(_range[1] - _range[0] + 1) );
   _bwlookup->SetTableRange( _range[0] , _range[1] );
   _bwlookup->SetSaturationRange( 0 , 0 );
   _bwlookup->SetValueRange( 0 , 1 );
   _bwlookup->SetAlphaRange( 1 , 1 );
   _bwlookup->Build( );
 
   vtkLookupTable * _collookup = vtkLookupTable::New( );
   _collookup->SetNumberOfColors( 256 );
   _collookup->SetTableRange( 0 , 255 );
   _collookup->Build( );
   _collookup->SetTableValue( 0  , 1 , 0 , 0 , 1 );
   _collookup->SetTableValue(128 , 0 , 0 , 1 , 1 );
   _collookup->SetTableValue(255 , 0 , 1 , 0 , 1 );


        vtkMetaImageWriter *writer = vtkMetaImageWriter::New( );
        writer->SetInput( stPoints );
        writer->SetFileName( "C:/Users/Images/temp_EED/image.mhd" );
        writer->SetFileDimensionality( 2 );
        writer->Write( );



        vtkDataSetMapper *_3DSliceMapper = vtkDataSetMapper::New( );
        _3DSliceMapper->SetInput(change->GetOutput( ) );
        _3DSliceMapper->SetLookupTable( _bwlookup );
        _3DSliceMapper->SetScalarRange( _range );
        _3DSliceMapper->ImmediateModeRenderingOn( );

        vtkActor *_3DSliceActor = vtkActor::New( );
        _3DSliceActor->SetMapper( _3DSliceMapper );

 // The usual rendering stuff.
  vtkCamera *camera = vtkCamera::New();
      camera->SetPosition(1,1,1);
      camera->SetFocalPoint(0,0,0);

  vtkRenderer *renderer = vtkRenderer::New();
  vtkRenderWindow *renWin = vtkRenderWindow::New();
    renWin->AddRenderer(renderer);

  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);

  renderer->AddActor( _3DSliceActor );
      renderer->SetActiveCamera(camera);
      renderer->ResetCamera();
      renderer->SetBackground(1,1,1);
  
  renWin->SetSize(300,300);

  // interact with data
  renWin->Render();
  iren->Start();





}

//-------------------------------------------------------------------
// EED 25 Janvier 2007 testLoic
void wxVtkMPR3DView::TestLoic2()
{
/*
 vtkVectorNorm *vecMagnitude = vtkVectorNorm::New();
                vecMagnitude->SetInput(VtkMainGrid);
                vecMagnitude->NormalizeOff();
                vecMagnitude->Update();
*/

        vtkPlane *slicePlane = vtkPlane::New();
                                this->_planeWidget->GetPlane( slicePlane );

                
        vtkCutter* sliceCutter = vtkCutter::New();
                vtkImageData *vtkimagedata =  this->GetVtkMPR3DDataViewer()->GetVtkMPRBaseData()->GetImageData();
                sliceCutter->SetInput( vtkimagedata );
                sliceCutter->SetCutFunction( slicePlane );

//EED
//        vtkLookupTable *lut = BuildHueWeightBaseMap();


        vtkPolyDataMapper *slice = vtkPolyDataMapper::New();
                slice->SetInput( sliceCutter->GetOutput() );
        double range[2];
// EED
//                slice->Update();
                                  vtkimagedata->GetScalarRange(range);
//                vecMagnitude->GetOutput()->GetScalarRange( range );
//                range[1] *= 0.7; // reduce the upper range by 30%
//                slice->SetScalarRange( range );
//                slice->SetLookupTable( lut );

//       vtkActor *sliceActor = vtkActor::New();
//                sliceActor->SetMapper( slice );

        vtkPolyDataMapper *contourMapper = vtkPolyDataMapper::New();
                contourMapper->SetInput( sliceCutter->GetOutput() );
                contourMapper->SetScalarRange( range );
  //              contourMapper->SetLookupTable( lut );

                
        vtkActor *contourActor = vtkActor::New();
                contourActor->SetMapper( contourMapper );



 // The usual rendering stuff.
  vtkCamera *camera = vtkCamera::New();
      camera->SetPosition(1,1,1);
      camera->SetFocalPoint(0,0,0);

  vtkRenderer *renderer = vtkRenderer::New();
  vtkRenderWindow *renWin = vtkRenderWindow::New();
    renWin->AddRenderer(renderer);

  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);

  renderer->AddActor( contourActor );
//  renderer->AddActor(cubeActor);
      renderer->SetActiveCamera(camera);
      renderer->ResetCamera();
      renderer->SetBackground(1,1,1);
  
  renWin->SetSize(300,300);

  // interact with data
  renWin->Render();
  iren->Start();


}