[vtkusers] how to find which points _would_ be merged by vtkCleanPolyData

[sebastien MARAUX]

Hello

I need to find which polydata points _would_ be merged with 
vtkCleanPolyData with a tolerance != 0

I would like to store some lines depending on their extremity
being candidate to merging or not,

I mean for example storing all lines with same 
begining to the same vtkPolyData, and another
vtkPolyData for each other begining group.

This requires to be able to find which first point of different 
lines would be merged together.

Has anybody an idea of how to do it, even some clues 
would be welcome.

Seb MARAUX
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