[vtkusers] How do I output PolyData's points?

[Matt Zumwalt]

Hi all,
    I'm trying to figure out how to generate a list containing the coordinates 
for all the points in a PolyData object.  I need to pass the list as 
parameters to one of the methods in an external program.   I'm sure there 
must be some simple way of doing this, but I can't figure it out.  Any help 
would be greatly appreciated.

thanks, 
 Matt Z