CGAL users discussion list

[Shuchu Han <>]

Thanks a lot! Think i should create the infinite cells by hand.

best regards

shuchu

On Wed, Nov 4, 2009 at 8:49 PM, Monique Teillaud <> wrote:

Shuchu Han wrote:

Thanks  a lot!   And I have another question :P

Hi

Currently, I try to represent several shell structured tetrahedral meshes that has two boundary surface. for example, a thin-wall sphere.

I am not sure I fully understand your needs, but I guess that the CGAL 3D mesh generation package could help you more than the 3D triangulation package alone.

I am using the incremental build method from the un-documented method described in " CGAL\Triangulation_incremental_builder_3.h"; Although it can not pass the "is_valid()" test, it works quite fine. my code can iterative visit the edges, cells and vertices;

however, problems occur recently when i handle a shell structured tetrahedral mesh which has shape edges. specifically, it has two boundaries, and each of them has polycube shape ( i got the surface mesh by polycube mapping).
When my old code iterative visit the finite edges of such a shell tetrahedral mesh, it seems jump into an infinite loop for looking the next edge.  (when use Triangulation_3::Finite_edges_iterator);

well, if your triangulation does not pass the is_valid() test, there is a high probability that things don't work...

Sir,  would u mind to give me an explanation about the theory of Edges of CGAL::Triangulation_3?  or recommend some papers about this.  And Is there any correct method to build a Triangulation_3 from an input file?

No need to look at papers, the CGAL manual of CGAL::Triangulation_3 (both user and reference manual) should be enough.

Best regards,

--
Monique Teillaud
INRIA Sophia Antipolis - Méditerranée
http://www.inria.fr/sophia/members/Monique.Teillaud/

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