[vtkusers] displaying outline of unstructered grid

[Matt Schmiermund]

I am currently trying to display the outside edges of
an unstructered grid. I have no problems displaying
the entire grid with
gridActor->GetProperty()->SetRepresentationToWireframe()
and displaying the surface with
SetRepresentationToSurface. If anyone knows how I can
go about showing only the outline of the grid I would
appreciate any help.

-Matt Schmiermund