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[Marco Aurelio Sterpa <>]

I use that vector<Halfedge> to save the levels of the arrangements. Anyway I've to change the structure used to mantain the arrangement while declare this?

typedef CGAL::Arrangement_2<Traits_2>                Arrangement_2;

2009/9/26 <>

You cannot access the method vertex(), cause there is no such a method in the arrangement halfedge nested class. (The Dcel halfedge does have a method called vertex()). Please refer to the manual.

Beside, why do you maintain a vector of halfedges and of halfedges handles?

Quoting Sterpa <>:

I've tried also this:
void algorithm_2(vector<Line_2> lines, int k) {
       CGAL::Geomview_stream gv(CGAL::Bbox_3(-100, -100, -100, 600, 600,
600));
       gv.set_line_width(2);
       gv.set_bg_color(CGAL::WHITE);
       gv.set_face_color(CGAL::BLACK);
       gv.set_vertex_radius(5);

       Arrangement_2 arr = getArrangement(lines);
       Edge_iterator ei;
       vector<Halfedge> levels[lines.size()];

      for(ei = arr.edges_begin(); ei != arr.edges_end(); ei++) {
              int i = getLevel(*ei, lines);
             levels[i].push_back(*ei);
}

int getLevel(Halfedge e, vector<Line_2> lines) {
       int k = 0;
       double x;
       e.vertex();

       ........
}

and I get the following error:

/usr/local/include/CGAL/Arrangement_on_surface_2.h: In function ‘int
getLevel(Halfedge, std::vector<CGAL::Line_2<CGAL::Simple_cartesian<double> >,
std::allocator<CGAL::Line_2<CGAL::Simple_cartesian<double> > > >)’:
/usr/local/include/CGAL/Arrangement_on_surface_2.h:736: error: ‘typename
TopTraits_::Dcel::Vertex* CGAL::Arrangement_on_surface_2<GeomTraits_,
TopTraits_>::Halfedge::vertex() [with GeomTraits_ =
CGAL::Arr_linear_traits_2<CGAL::Simple_cartesian<double> >, TopTraits_ =
CGAL::Arr_unb_planar_topology_traits_2<CGAL::Arr_linear_traits_2<CGAL::Simple_cartesian<double>

,

CGAL::Arr_default_dcel<CGAL::Arr_linear_traits_2<CGAL::Simple_cartesian<double>

> >]’ is private

arrangement.cpp:214: error: within this context

It seems I cannot access the method vertex() of the halfedge structure, so I
can proceed with this?--

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