[vtkusers] extractvoi

[CLEMENTS, ROBERT]

I want to use a vtkboxwidget to select a volume of interest within a dataset from which to generate an isosurface.  I can't figure out how to return the bounds of my boxwidget to 	SetVOI with vtkExtractVOI.  I have been playing around with GetPolyData but cant figure out how to return the bounds of my boxwidget.  I can create the surface and clip it with the boxwidget, but i only want to generate the surface from within the voi (not the entire dataset).  Any ideas? 


much obliged
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