CGAL users discussion list

[Jane Tournois <>]

Hi,

Le 04/01/2015 20:08, Zohar a écrit :
> Hi,
>
> I am making a mesh_3 from a manifold polyhedron_3 along the lines of the
> code below.
>
> 1.
> Is it possible to set the criteria to break when a max number of facets was
> reached (while keeping the facet angle and facet distance criteria)?
> A different criteria would be to break only when a max number of facets was
> reached (optimizing face distance).
It is not implemented, and actually I think you could not get guarantees 
on the correctness of your output mesh if you stop meshing when a max 
number of facets is reached.

> 2.
> I used a facet topology criteria. Nevertheless, I get non-manifold elements?
> You probably need a minimal example, but I wanted to verify that before
> constructing one.
can you please send your output mesh?

Thanks,
Jane.

> ----
>
> typedef CGAL::Exact_predicates_inexact_constructions_kernel GT;
> typedef CGAL::Mesh_triangulation_3<Mesh_domain>::type Tr3;
> typedef CGAL::Mesh_complex_3_in_triangulation_3<Tr3> C3t3;
> typedef CGAL::Mesh_criteria_3<Tr3> Mesh_criteria;
> typedef CGAL::Mesh_facet_criteria_3<Tr3> Facet_criteria;
> typedef Mesh_criteria::Cell_criteria Cell_criteria;
> Polyhedron2 poly;
> typedef CGAL::Polyhedral_mesh_domain_3<Polyhedron2, GT> Mesh_domain;
> Mesh_domain domain(poly);
> Facet_criteria facet_criteria(25., 0.1, dist,
> CGAL::FACET_VERTICES_ON_SAME_SURFACE_PATCH_WITH_ADJACENCY_CHECK);
> Cell_criteria cell_criteria(2., 0.4); // radius-edge ratio, size
> Mesh_criteria criteria(facet_criteria, cell_criteria);
> C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria, no_perturb(),
> no_exude());
> vector<GT::Point_3> points;
> vector<int> tris;
> get_boundary_of_c3t3<C3t3,GT>(c3t3, 0, points, tris);
>
>
>
>
> --
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> http://cgal-discuss.949826.n4.nabble.com/make-mesh-3-criteria-tp4660269.html
> Sent from the cgal-discuss mailing list archive at Nabble.com.


--
Jane Tournois, PhD
R&D Engineer at GeometryFactory
http://www.geometryfactory.com/