CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Hello,

I don't get if your problem is in outputting the mesh to your specific
format or creating it.

S.

Bruce Duncan wrote:
> 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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