[Insight-users] ContourWidget continuously problem

[Dora Szasz]

Hello all,

I think ContourWidget doesn't like me at all.
Now I am trying to put a default circle as contour widget over a DICOM Image and it doesn't appear.
Do you have any idea?


Thanks,

Dora

Here is the code:

#include "vtkImageViewer2.h" 
#include "vtkRenderWindowInteractor.h" 
#include "vtkContourWidget.h" 
#include "vtkContourLineInterpolator.h" 
#include "vtkOrientedGlyphContourRepresentation.h" 
#include "vtkDICOMImageReader.h" 
#include "vtkProperty.h"
#include "vtkPolyData.h"
#include "vtkSmartPointer.h"
#include "vtkMath.h"
#include "vtkCellArray.h"

int main() 
{ 
        //Setting up Viewer
        vtkImageViewer2* viewer = vtkImageViewer2::New(); 
        vtkRenderWindowInteractor* iren = vtkRenderWindowInteractor::New(); 
        viewer->SetupInteractor(iren); 

        //Load DICOM Image into Viewer 
        vtkDICOMImageReader* reader = vtkDICOMImageReader::New(); 
        reader->SetDirectoryName("F:/Neurostar/Imaging Data/MRSet"); 
        reader->Update(); 
        viewer->SetInput(reader->GetOutput());
viewer->SetSlice(40);

//Draw the Circle
vtkSmartPointer<vtkPolyData> pd = vtkSmartPointer<vtkPolyData>::New();
 
vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
vtkSmartPointer<vtkCellArray> lines = vtkSmartPointer<vtkCellArray>::New();
vtkIdType* lineIndices = new vtkIdType[21];
for (int i = 0; i< 20; i++)
{
const double angle = 2.0*vtkMath::Pi()*i/20.0;
points->InsertPoint(static_cast<vtkIdType>(i), 0.1*cos(angle),0.1*sin(angle), 0.0 );
lineIndices[i] = static_cast<vtkIdType>(i);
}
lineIndices[20] = 0;
lines->InsertNextCell(21,lineIndices);
delete [] lineIndices;
pd->SetPoints(points);
pd->SetLines(lines);

        //Setting up Contour Widget 
        vtkContourWidget* widget = vtkContourWidget::New(); 
        vtkOrientedGlyphContourRepresentation* rep = vtkOrientedGlyphContourRepresentation::New(); 
        rep->GetLinesProperty()->SetColor(1, 0, 0);
widget->SetRepresentation(rep);
        widget->SetCurrentRenderer(viewer->GetRenderer());
        widget->SetInteractor(iren);
widget->On();
widget->SetEnabled(true);
widget->ProcessEventsOn(); 
        

        //Start Interaction
widget->Initialize(pd);
widget->Render();
                //viewer->Render();
iren->Initialize();
        iren->Start(); 
} 
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