CGAL users discussion list

Hi Thomas

Regular_triangulation::Facet needs to know a Cell_handle, which is not 
known at the vertex_base level.

Using the rebind mechanism (mentioned in the Triangulation chapter, that 
refers to the 3D Triangulation data structure chapter for a more 
extensive description) should solve your problem.
The vertex_base_with_info is a simpler but less powerful way to add 
information.

best
        Monique Teillaud

Thomas Zangl wrote:
> Hi!
>
> I have 2 types of triangulation in my application:
>
> * Delaunay
> * Regular
>
> I define them like this:
>
> typedef CGAL::Regular_triangulation_euclidean_traits_3<K> Traits;
> typedef CGAL::Triangulation_vertex_base_with_info_3<int, Traits> Vb;
> typedef CGAL::Regular_triangulation_cell_base_3<Traits>  CbBase;
> typedef CGAL::Triangulation_cell_base_with_info_3<RTCellState, Traits, 
> CbBase> Cb;
> typedef CGAL::Triangulation_data_structure_3<Vb, Cb>  Tds;
> typedef CGAL::Regular_triangulation_3<Traits, Tds> Regular_triangulation;
>
> and:
>
> typedef CGAL::Triangulation_vertex_base_with_info_3<int, Traits> DVb;
> typedef CGAL::Triangulation_cell_base_with_circumcenter_3<K> DCb;
> typedef CGAL::Triangulation_data_structure_3<DVb, DCb>       DTDS;
> typedef CGAL::Delaunay_triangulation_3<K, DTDS> Delauny_Triangulation;
> typedef Delauny_Triangulation::Vertex_handle          Dt_Vertex_handle;
>
> I have added some cell info to the regular triangulation. The class is 
> called "RTCellState" and one member of it is a "Dt_Vertex_handle".
> If I define the Delaunay Triangulation before I include the 
> RTCellState.h" everything works fine as it should. Now I have an issue 
> with extending the Delaunay_Vertex_Base with some info about the 
> Regular_Triangulation::Facet.
>
> So, if I change the line:
> typedef CGAL::Triangulation_vertex_base_with_info_3<int, Traits> DVb;
>
> to:
> typedef 
> CGAL::Triangulation_vertex_base_with_info_3<Regular_triangulation;::Facet, 
> Traits> DVb;
>
> I do get compiler errors. Any ideas to handle this case? I need both 
> references:
>
>  From a Delaunay Vertex an info about some RegularTriang. Facet and then 
> second reference from a RegularTriang. Cell to some Delaunay Vertex 
> Handles.
>
> Please help! :-) TIA,
> Thomas