[vtkusers] vtkDecimatePro decimation leads to holes

[Sébastien MARAUX]

Hello,

I got some issues using vtkdecimate Pro : 
1. Why do some holes appear when I decimate a regular surface (obtained from delaunay2D) ?
2. Why does a "steps effect" appear in the same conditions, 
when the base surface is smooth ?

Thanks in advance for any advice, answer or compassion.

Seb
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