[vtkusers] vtkExtractPolyDataGeometry with normals

[Jan Fransens]

Hi,

  I am currently using the vtkExtractPolyDataGeometry filter to extract
portions of a vtkPolyData (with per cell normals). This works fine but  the
filter seems to discard the cell normals of the input mesh. I was wondering
if it were possible to obtain the normals on the extracted geometry without
having to generate them with vtkPolyDataNormals.

Thanks,

Jan
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