[SOLVED] How to extrude an extrusion using VTK python ..how to convert the first extrusion to something useable in vtkLinearExtrusionFilter()?

How to extrude an extrusion using VTK python ..how to convert the first extrusion to something useable in vtkLinearExtrusionFilter()?

Funny question, and I am really new to this (please dont assume i know anything lol)

But I have taken a set of points and converted to a polyline (polydata) and then extruded this polydata using vtkLinearExtrusionFilter into a surface.

Now I would like to extrude that surface into a 3d solid, how can I extrude the 1st extrusion? How to properly save 1st extrusion as vtkDataObject (see error below)

TypeError:

SetInputData argument 1: method requires a vtkDataObject, a vtkLinearExtrusionFilter was provided.

Solution

You need to take the output of the filter, and not the filter itself. This output is a vtk data object.

first_extrusion = vtkLinearExtrusionFilter()
# set parameters ....
first_extrusion.Update()

second_extrusion = vtkLinearExtrusionFilter()
second_extrusion.SetInputData( first_extrusion.GetOutput() )
# set other parameters ...