[vtkusers] delaunay2D and closed polygons (first point repeated as last)

[sebastien MARAUX]

Is it normal that Delaunay2D needs closed polygons (i.e.
first point is repeated as last in polygons definition) for 
constraints ? 

As VTK defines a VTK_POLYGON (check user's guide 
p.358) I would expect classes to handle polygons without 
repeating last point.

Could someone familiar with delaunay2D code check this?

Thanks

Seb
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