CGAL users discussion list

[Sebastien Loriot <>]

Did you include

#include <CGAL/boost/graph/graph_traits_Delaunay_triangulation_2.h>

?

If yes, could you please post a complete example we could compile to 
reproduce the error?

You can use git.github.com to post the code.

Best,

Sebastien.

On 12/10/20 2:25 PM, "coz.mars123" ( via 
cgal-discuss Mailing List) wrote:
> Hi,
>
> I'd like to iterate over edges of a Delaunay triangulation and get the
> adjacent faces. The triangulation is the following:
>
> typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
> typedef K::Point_3   Point;
> typedef K::Vector_3   Normal;
> typedef std::pair<Normal, unsigned int> Info;
> typedef CGAL::Projection_traits_xy_3<K>  Gt;
> typedef CGAL::Triangulation_vertex_base_with_info_2<Info, Gt> Vb;
> typedef CGAL::Constrained_triangulation_face_base_with_info_2<unsigned int,
> Gt>  Fb;
> typedef CGAL::Triangulation_data_structure_2<Vb,Fb> Tds;
> typedef CGAL::Constrained_Delaunay_triangulation_2<Gt, Tds> Delaunay;
>
> I found this topic
> http://cgal-discuss.949826.n4.nabble.com/How-to-find-the-adjacent-faces-of-every-edge-td4663625.html
> related to my question.
>
> However, it doesn't work in my case. When I use boost::graph_traits:
>
> typedef boost::graph_traits<Delaunay> GraphTraits;
> typedef typename GraphTraits::face_descriptor face_descriptor;
>
> A compilation error occurs: directed_category is not a member of
> CGAL::Delaunay_triangulation_2<Gt,Tds>.
>
> Thank you for your help!
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/