CGAL users discussion list

[Asher Kamiraze <>]

Hi all,

Is there a way to build an alpha_shape_2 with info? Something similar to a triangulation with info.

I have also noticed that insert() is private in alpha_shape_2, but, push_back is not. Isn't it a problem?

Here is what I am trying to do:

    typedef CGAL::Exact_predicates_exact_constructions_kernel                       K;

    struct vertex_info { Point point3d; };

    struct face_info {};

    typedef CGAL::Triangulation_vertex_base_with_info_2<vertex_info,K>              Vb_2;

    typedef CGAL::Constrained_triangulation_face_base_with_info_2<face_info,K>      Fb_2;

    typedef CGAL::Alpha_shape_vertex_base_2<K, Vb_2> Vb;

    typedef CGAL::Alpha_shape_face_base_2<K, Fb_2>  Fb;

    typedef CGAL::Triangulation_data_structure_2<Vb,Fb>                         TDS_2;

    typedef CGAL::Delaunay_triangulation_2<K  , TDS_2>                              DT_2;

    typedef CGAL::Alpha_shape_2<DT_2> Alpha_shape_2;

            Alpha_shape_2 alpha_shape(0.5);

            // How to insert points in alpha_shape with attached info?

Hope you could help

Best regards

Asher