[vtkusers] saving vtkPolyData after vtkClipPolyData issue

[Yusuf OEZBEK]

 Hello,
I want to save my polydata after clipping with vtkBoxWidget. If I run following code-block, the saved file is empty. What can be my mistake here?
  m_Clip= vtkSmartPointer<vtkClipPolyData>::New();
  m_Clip->SetClipFunction(m_Plane);
  m_Clip->InsideOutOn();
  m_Clip->SetInputConnection(m_Decimater->GetOutputPort());
  m_PolyDataSave= vtkSmartPointer<vtkPolyData>::New();
  m_PolyDataSave->ShallowCopy(m_Clip->GetOutput());
  m_PolyDataWriter = vtkSmartPointer<vtkPolyDataWriter>::New();
  m_PolyDataWriter->SetFileName("clippedObject.vtk");
  m_PolyDataWriter->SetInput(m_PolyDataSave);
  m_PolyDataWriter->SetFileTypeToASCII();  m_PolyDataWriter->Write();
Thank you for any help!
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