[vtkusers] vtkPolyData projected to a 2D plane, and then outlined/silhouetted...

[David Cole]

Is there already a VTK filter that does this? I can't seem to find
just the right thing, and I don't want to write it unless I really
have to.

What I want is a filter that projects all the points of a polydata to
a 2D plane, and then connects the set of outermost points to produce
the outline of the projected polydata - like a shadow of it... (the
output should be another polydata which is a single closed polygon, or
the line segments that make up such a polygon.)

I tried vtkPolyDataSilhouette, which is close, but it's still a 3D
polydata, and it does not produce a closed outline.

Does anybody know the name of a filter that will do this?


Thanks,
David C.