[vtkusers] how to create an implicit function from an extruded polygon?

[Sebastien_MARAUX]

Hello,

I wish to clip (x,y,z) points & triangles.
I would like to keep values whose inside a (x,y) polygon, z doesn't matter.

How can I produce a volume / implicit function of the clipping polygon "extruded" and sending it to vtkClipPolyData ?

Sebastien MARAUX
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