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["Sebastien Loriot (GeometryFactory)" <>]

On 03/23/2016 11:04 AM, Andrea Romanoni wrote:
> Hi,
>
> a quite odd issue is bothering me from a long time.
> I have a 3D Polyedron represented by a triangular mesh, and I need to
> subdivide a subset of the facets, by simply one-to-four subdivision. I need
> to split only the subset that meets a certain condition.
>
> Up to now I use the Subdivision_method_3::PTQ method implemented an
> extension of CGAL::Loop_mask_3<Polyhedron_3> where
>     - the  edge_node(Vertex_handle v, Point_3 &pt) function puts the point pt
> in the middle of the edge if the facet or the neighboring facets meet the
> condition, otherwise copies the position of v in pt;
>     - the vertex_node (Vertex_handle v, Point_3 &pt) function copies the
> position of v in pt;
>     - the border_node (Halfedge_handle e, Point_3 &ept, Point_3 &vpt) acts as
> the edge_node function
>
> After this process duplicate vertices are generated and I manually collapse
> the corresponding edges.
>
> Is there a more efficient and elegant way?
>
>
> Thanks,
>
> Best Regards,
>
> Andrea

If you are simply interested in locally refining your mesh you can use
the new isotropic_remeshing function introduced in CGAL 4.8:

http://doc.cgal.org/4.8/Polygon_mesh_processing/group__PMP__meshing__grp.html#gad3d03890515ae8103bd32a30a3486412

Sebastien.

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