CGAL users discussion list

[Bruce Duncan <>]

Hi all,

I am writing a mesh generator with quite specific requirements. As a result, 
I 
need to output a polyhedron in CGNS format.

I can do the CGNS output very easily if I have a set of tetrahedra. In fact I 
have already implemented this to output a Triangulation_3.

At first I tried to use Triangulation_3 and it's siblings directly. However, 
they don't take into account edges and my concave polyhedra are destroyed in 
the process of triangulation. Is there a way around this?

Next, I turned to the Mesh_triangulation_3 class. This accepts a Polyhedron 
and gives access to a Triangulation_3. Excellent! The problem is that it does 
not respect the vertices and edges of the input Polyhedron. My application 
really depends on having the vertices remain in the same place. Other 
vertices 
and edges may be added, however. Is there a way to achieve this?

I have tried to use the Polyhedral_mesh_domain_with_features_3 class but 
without much success... I may post a test case about that next week.

Let me know if images or code would help clarify what I'm trying to do.

Thanks,
Bruce

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