CGAL users discussion list

[Andreas Fabri <>]

James Le Cuirot wrote:
> Hi,
>
> I want to attach a string to each point that I'm passing into a
> Delaunay Triangulation. I need to be able to access this string when
> iterating through the edges later on. I thought that subclassing the
> Point_2 class was the way to go but when I obtain the segment and
> consequently the point, that information appears to be lost. I guess
> this is because you get a copy of the point rather than a pointer to
> the actual instance you passed in. What is the proper way to do this? I
> saw some things in the manual like property maps that sounded like they
> might be what I need but they were discussed in a different context so
> I wasn't sure.
>
> Thanks,
> James

Hi James,

You might store the extra information in the vertex by using the class 
Triangulation_vertex_base_with_info_2
http://www.cgal.org/Manual/last/doc_html/cgal_manual/Triangulation_2_ref/Class_Triangulation_vertex_base_with_info_2.html

andreas