Is this working?

[Gavin Tabor]

Hi. I posted a couple of queries to the list last week, but they
seem to have sunk without trace. If that means that noone's interested
in helping me, so be it, but could someone confirm that my messages 
are actually getting through?

I'm still stuck with trying to produce contours on a plane from a 
vtkUnstructuredGrid. My pipeline looks like this :

                         vtkPlaneSource 
                              V
                         vtkTransformPolyDataFilter
                              V
vtkUnstructuredGrid   >  vtkProbeFilter
                              V
                         vtkContourFilter
                              V
                         vtkPolyDataMapper
                              V
                         vtkActor

When I connect the actor to the renderer all I get is a completely black
screen : its like the code is jammed. (Yes, I should be getting a white
screen...). The probing I think works : I've used something similar to
probe the data for vectors. What am I doing wrong? I would be _so_
grateful for any help : this is driving me up the wall :-(

Gavin

-- 

Dr. Gavin Tabor
School of Engineering and Computer Science
Department of Engineering
University of Exeter
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