[vtkusers] Will vtkClipPolyData accept a narrow-band implicit function?

[Theodore D. Sternberg]

I'd like to supply my own vtkImplicitFunction to use with vtkClipPolyData.
However, it would be difficult to sensibly define my implicit function
everywhere.  Is there a way to get vtkClipPolyData to work properly with
an implicit function that is defined only within some neighborhood of the 
set of points where that implicit function equals zero?

Ted Sternberg
Lawrence Berkeley National Laboratory
Berkeley, California