CGAL users discussion list

[Sebastien Loriot <>]

The number of input triangles does no affect the number of output cells.

Note that a simple working example that we can compile and run on 
gist.github.com would most probably understand your problem.
Right now I can only guess that the number of output cells is the one
needed to preserve the topological criteria.

Best,

Sebastien.

On 5/10/22 15:23, Bob Bill ( via cgal-discuss Mailing 
List) wrote:
> Unfortunately the result is more or less the same, but I think I 
> identified the issue: my original surface mesh is not triangulated, so 
> maybe CGAL::triangulate_faces() is adding  too many triangles, right? 
> The following snippet highlights what I am referring to. Is there any 
> way to have a "minimal" triangulation for the faces when calling 
> triangulate_faces()?
>
> Best,
> Bob
>
> CGAL::Polygon_mesh_processing::triangulate_faces(surface_mesh);
> Mesh_domain domain(surface_mesh);
> domain.detect_features();
> Mesh_criteria criteria(CGAL::parameters::facet_size = 0,
> CGAL::parameters::facet_distance = 0,
> CGAL::parameters::cell_radius_edge_ratio = 2,
> CGAL::parameters::cell_size = 0);
> C3t3 triangulation = CGAL::make_mesh_3<C3t3>(domain,
> criteria,
> CGAL::parameters::no_perturb(),
> CGAL::parameters::no_exude());
>
> Il martedì 10 maggio 2022, 09:29:46 CEST, Sebastien Loriot" 
> ( via cgal-discuss Mailing List) 
> <> ha scritto:
>
>
> If you put facet_size=0, facet_distance=0, cell_radius_edge_ratio=2 and
> cell_size=0 then there is no geometric criteria applied to refine the
> mesh (only the topological one). If you mesh is too coarse then you
> can change those values to match the level of detail you are expecting.
>
> Best,
>
> Sebastien.
>
> On 5/9/22 14:51, Bob Bill ( 
> <> via cgal-discuss Mailing
> List) wrote:
>  > Dear all,
>  >
>  > I successfully applied the function make_mesh_3() to fill a 3D mesh. So
>  > far the result is too refined, and I'd like to let my C3t3 to be as
>  > coarse as possible, i.e. I want only few tets inside.
>  >
>  > If I use the default constructor
>  >
>  > Mesh_criteria criteria;
>  >
>  > then the result is non-sense. Is there any way to have something like
>  > the bottom left figure here
>  > (https://doc.cgal.org/latest/Mesh_3/index.html#fig__figureparameters 
> <https://doc.cgal.org/latest/Mesh_3/index.html#fig__figureparameters>) ,
>  > but without specifying the parameters for every situation?
>  >
>  > Bob
>  >
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