[vtkusers] vtkAppendPolyData

[R K Shyamprakash]

Hello,
	I use vtkAppendPolyData to create one actor  out of two or more actors. But
I noticed that each time I get the output of vtkAppendPolyData, the number
of points is increasing. For a test case, I clip an actor using
vtkClipPolyData, then append the output and clipped output using
vtkClipPolyData. I continued this for about 20 iterations. Then saved the
polydata into a file. The size of the file has increased by 6 MB(initial
size - 9 MB, final size - 15 MB). Is there anyway I can avoid these
duplicate points?

Thanks
Shyam