CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Costas Tsirogiannis wrote:
> Greetings,
>
> i am trying to make terrain triangulation which is also a constrained 
> Delaunay triangulation. The instantiation  that I try is:
>
>   typedef typename 
> CGAL::Triangulation_vertex_base_2<Kernel>                                                                                               
> Vertex_base;
>   typedef typename 
> CGAL::Constrained_triangulation_face_base_2<Kernel>                                                  
>                             Face_base;
>   typedef typename 
> CGAL::Triangulation_data_structure_2<Vertex_base,Face_base>                                                               
> Triangulation_structure;
>   typedef typename CGAL::Triangulation_euclidean_traits_xy_3< Kernel 
>  >                                                                                  
> Triangulation_traits;
>   typedef typename 
> CGAL::Exact_predicates_tag                                                                           
>                                               Exact_tag;
>   typedef typename 
> CGAL::Constrained_Delaunay_triangulation_2<Triangulation_traits, 
> Triangulation_structure, Exact_tag>  Triangulation;
>
> but I get lots of compilation errors, instead if I try a simple Delaunay 
> triangulation everything looks ok.
>
> Any ideas on what I'm doing wrong?
>
> thanks,
>
> Constantinos

First  CGAL::Triangulation_euclidean_traits_xy_3 is deprecated,
you should use Projection_traits_xy_3 instead.

http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Kernel_23_ref/Class_Projection_traits_xy_3.htm

Then replace K by Triangulation_traits in vertex and face instantiation
and that should work.

Sebastien.