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Re: [cgal-discuss] Polyhedron_incremental_builder_3::test_facet_indices fails


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  • From: Zohar <>
  • To:
  • Subject: Re: [cgal-discuss] Polyhedron_incremental_builder_3::test_facet_indices fails
  • Date: Thu, 16 May 2019 07:01:11 -0500 (CDT)
  • Authentication-results: mail3-smtp-sop.national.inria.fr; spf=None ; spf=Neutral ; spf=Pass
  • Ironport-phdr: 9a23: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

I think it checks for a non-manifold vertex. More specifically, consider a
vertex incident to two triangle fans. If you add a facet that would close
one of the fans into a cone, then it's definitely going to be a non-manifold
vertex. For example, the last facet:

OFF
6 4 0

-1 -1 0
1 -1 0
1 1 -1
-1 1 0
0 0 0
-1 0 0

3 0 1 4
3 2 3 4
3 3 5 4
3 2 4 5



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