[vtkusers] vtkExtractEdges only 2D, how to do a projection ?

[Sebastien_MARAUX]

I needto use vtkExtractEdges on a polydata 
containing 3D data.

How can I make a simple projection of my data in
xz plane  to obtain a 2D polyData ?

I assume there is a smarter way than
creating a 2D polydata and insert each
point as (x,z) couple, and then copy each cell.

Sebastien MARAUX
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