[vtkusers] Polydata Normals, once again
francois.touvet at inria.fr
Fri Aug 8 10:50:11 EDT 2014
I am facing a strange problem concerning the normals of a polydata: there
are normals pointing both inside and outside!
The thing is that it is not an usual polydata, it is generated from a 360°
rotation of a contour on a plane. My guess is that it has not one but two
surfaces. I tried to change parameters of the different filters but no good
result came out; I also tried to recompute normals with vtkPolyDataNormals
but I always get my double set of normals.
My question now is: is it possible to delete a part of the normals? of the
Here is a sample code to illustrate my question:
plane = vtk.vtkPlane()
plane.SetNormal(0.0, 1.0, 0.0)
clipper = vtk.vtkClipPolyData()
# rotational extrusion along z-direction
extruder = vtk.vtkRotationalExtrusionFilter()
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