[vtkusers] vtkClipPolyData Update call crashes program

[timecatcher]

Hi,

I am currently facing a problem with calling update on the vtkClipPolyData
object. My program prematurely terminates.

I am not sure why the algorithm is unable to execute. All the objects are
appropriately initialized and used.

I know that connections work because if I don't update the clipper then the
plane widget with an empty polydata is rendered. When I call update() the
program ends prematurely.

Here is my code snippet: 

void initializeClippingObjects() {
    planeWidget = vtkImplicitPlaneWidget::New();
    planeWidget->SetInteractor(interactor); // vtkRenderWindowInteractor
interactor
    planeWidget->DrawPlaneOff();
    planeWidget->OutlineTranslationOff();
    planeWidget->ScaleEnabledOff();
    planeWidget->KeyPressActivationOff();
    planeWidget->NormalToXAxisOn();
    planeWidget->Off();
    clipper = vtkClipPolyData::New();
    clipper->DebugOn();
    clippingPlane = vtkPlane::New();
    clippingPlane->DebugOn();
    clipper->SetClipFunction(clippingPlane);
}

void enableClipping() {
    planeWidget->SetProp3D(surfaceActor);
    planeWidget->SetPlaceFactor(1.25);
    planeWidget->PlaceWidget();
    planeWidget->On();
    clipper->SetInput(dataset); //dataset is of type vtkPolyData
}

void performClip() {
    planeWidget->GetPlane(clippingPlane);
    clipper->Update();
    dataset->DeepCopy(clipper->GetOutputDataObject(0)); //this drives the
dataset pipeline to update the view
}

initializeClippingObjects() is called in the constructor.

A qt checkbox triggers enableClipping() which works fine since the dataset
is displayed in the plane widget. Then a qt button triggers performClip(). 

Here are the debug messages:

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 150
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): setting
AbortExecute to 0

Debug: In /build/buildd/vtk-5.4.2/Graphics/vtkClipPolyData.cxx, line 135
vtkClipPolyData (0x1a0af00): Clipping polygonal data

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Debug: In /build/buildd/vtk-5.4.2/Filtering/vtkAlgorithm.h, line 151
vtkClipPolyData (0x1a0af00): vtkClipPolyData (0x1a0af00): returning
AbortExecute of 0

Segmentation Fault





Any help will be appreciated.

Thanks,
timecatcher

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