CGAL users discussion list

[Damian Sheehy <>]

Hi Panagiotis,

 

I believe the problem is in the CGAL Delaunay implementation; I also encountered this behaviour and reported it. I understand the CGAL development team is looking into it . . .

Regards,

 

Damian

 

On Tue, Apr 14, 2009 at 7:48 PM, panayiotis foteinos <> wrote:

Hello all.

I have implemented a Delaunay Refinement algorithm on CGAL. All the decisions
made in the algorithm are deterministic: multiple runs on the same input PSLG
should produce exactly the same mesh.

I observed, however, that the output mesh is not the same after each run.
Fortunately, the ouput mesh is the "correct" one after each run (I am sure
about the correctness of the refined output mesh), but different. For
example, the meshing of the PSLG for the first time yields 1500 faces, while
the second time yields 1510.

I am sorry I am asking you this but (after spending a lot of time debugging) I
have to be sure:
       Is this behavior possible or there is a bug in my code? Should I expect the
same answers from CGAL (with the same input) when no exact constructions are
used?

The number type I am using is double, while the predicates are exact.

Thanks,
Panagiotis


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