CGAL users discussion list

[Marc Glisse <>]

On Sat, 9 Jul 2016, Grzegorz JABLONSKI wrote:

> Ok, my mistake. Here is the complete code:
>
> #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
> #include <CGAL/Periodic_2_triangulation_filtered_traits_2.h>
> #include <CGAL/Periodic_2_Delaunay_triangulation_2.h>
> #include <CGAL/Triangulation_vertex_base_with_info_2.h>
> #include <CGAL/Alpha_shape_2.h>
>
> //**********TYPEDEFS********************
> typedef CGAL::Exact_predicates_exact_constructions_kernel K;
> typedef CGAL::Periodic_2_triangulation_traits_2<K> GT;
> typedef CGAL::Triangulation_vertex_base_with_info_2<unsigned, K> Vb_info;
> typedef CGAL::Alpha_shape_vertex_base_2<K, Vb_info>       Vb;
> typedef CGAL::Alpha_shape_face_base_2<K>                                      
>             Fb;
> typedef CGAL::Triangulation_data_structure_2<Vb, Fb>    Tds;
> typedef CGAL::Periodic_2_Delaunay_triangulation_2<GT, Tds>  PDT;
> typedef CGAL::Alpha_shape_2<PDT> Alpha_shape_2;
>
> int main()
> {
>         Alpha_shape_2 as;
> }
>
> This time there is a problem with    using Dt::OUTSIDE_CONVEX_HULL   in 
> Alpha_shape_2.h

Thanks. Periodic_3_triangulation_3.h has:

    OUTSIDE_CONVEX_HULL, // unused, for compatibility with Alpha_shape_3
    OUTSIDE_AFFINE_HULL }; // unused, for compatibility with Alpha_shape_3

(not sure that's the best way to go about it, but as long as it works...)
and the 2D version doesn't. Don't hesitate to file an issue on github to 
make sure this isn't forgotten (you could even try a pull request).

--
Marc Glisse