[vtkusers] discarding cells

[Matthias Baitsch]

Hi,

I wonder if where is a possibility (a filter) to discard a specific 
cell type (e.g. lines) from polydata.

What I want to do roughly looks like this:



LineCells --|                           |-> ??? (discard polys) --
render only lines
            |                           |
PolyCells --|-> PolyData -- WarpScalar -|
            |       |                   |
Points -----|       |                   |-> CountourFilter      --
render countour lines
            |       |
Normals ----|       |
                    |
                    |---------------------> ??? (discard lines) --
render only surface



Can someone point me to the question marks in the diagram above? It
would be possible to write a filter, but I think there is a simpler
solution.

Thanks, Matthias