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Hi,

I am not sure I understand the question.
Some cells are infinite. You may want to clip the Voronoi diagram by any 
bounding box if you want to get only finite features. Then you need to 
be careful when choosing the box, if you want to have a piece of every 
cell/facet/edge and every vertex in it.

Best,
        Monique Teillaud

Matthieu Chavent wrote:
> Hello, everybody!
>
> I work on 3D Regular Delaunay Triangulation. I create its dual: the 
> voronoi diagram with the triangulation.dual() function. The problem is 
> the infinite voronoi cells. In fact I have the limit of the voronoi 
> cells: the rays. but I don't  know how I can stop them to create voronoi 
> cells  which  was finite and convexes.
>
> I hope, that my question was clear. If someone have an idea..