CGAL users discussion list

[Sebastien Loriot <>]

vertex_handles is a function so it should be arr.vertex_handles().
This gives you a range so you need to iterate over the container and
call the function for each vertex.

Something like:
for (Vertex_const_handle v : arr.vertex_handles())
{
  print_incident_halfedges(v);
}

Best,

Sebastien.

On 3/17/21 2:24 PM, Aomandeyi ( via cgal-discuss 
Mailing List) wrote:
> my codes are as follow , i don't sure the parameters of
> "print_incident_halfedges()" is "arr.vertex_handles" or not.
> ------------------------------------------------------------
> #include <CGAL/Cartesian.h>
> #include <CGAL/Arr_non_caching_segment_traits_2.h>
> #include <CGAL/Arrangement_2.h>
> typedef int Number_type;
> typedef CGAL::Cartesian<Number_type> Kernel;
> typedef CGAL::Arr_non_caching_segment_traits_2<Kernel> Traits;
> typedef Traits::Point_2 Point;
> typedef Traits::X_monotone_curve_2 Segment;
> typedef CGAL::Arrangement_2<Traits> Arrangement;
>
> template <typename Arrangment>
> void print_incident_halfedges(typename Arrangement::Vertex_const_handle v)
> {
>         if (v−> is_isolated()) {
>                 std::cout << "The vertex (" << v−> point() << ") is isolated" 
> <<
> std::endl;
>                 return;
>         }
> }
> int main()
> {
>         Point p1(1, 1), p2(1, 2), p3(2, 1);
>         Segment cv[] = { Segment(p1, p2) , Segment(p2, p3) , Segment(p3, p1) 
> };
>         Arrangement arr;
>         insert(arr, &cv[0], &cv[sizeof(cv) / sizeof(Segment)]);
>         print_incident_halfedges(arr.vertex_handles);
>     return 0;
> }
> ----------------------------------------------------------
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/