CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 06/05/2013 04:29 PM, Alexandre Bilger wrote:
> Hello,
>
> my question concerns the optimization phase of the 3D mesh generation.
> http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Mesh_3/Chapter_main.html
>
> I have an existing tetrahedral mesh and I would like to detect if there
> are bad quality tetrahedron, and if so fix them.
> That is why I would like to maybe use the optimization phase of the 3d
> mesh generation.
>
> The functions corresponding to the different optimization processes
> expect a C3T3 as input. I saw that this structure is generated by
> CGAL::make_mesh_3 or CGAL::refine_mesh_3.
> But, I cannot call these function as my mesh is already existing.
>
> Is it possible to use the optimization functions (such as
> lloyd_optimized_mesh_3 etc) on a an existing mesh? If so, should I
> create an empty C3T3 structure and fill it with my mesh topology? In
> that case, what attributes should I fill to use it in the optimization
> functions? And how to define the MeshDomain_3?
>
> Maybe it's impossible as the optimizationprocess asks data computed in
> CGAL::make_mesh_3.
This is only possible if your input mesh fits into a c3t3, that is it 
can fit in a 3D regular triangulation.

Sebastien.


> Thanks,
>
> Alexandre Bilger