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[Guilherme Kunigami <>]

Thank you very much!

On Tue, Aug 11, 2009 at 5:53 PM, <> wrote:

Quoting "Guilherme Kunigami" <>:

The following example constructs an arrangement with three circles:

http://www.cgal.org/Manual/3.4/examples/Arrangement_on_surface_2/circles.cpp

Then I used the code in 'examples/Arrangement_on_surface_2/arr_print.h' to
print the arrangement. I'm interested in the output of the 'he->curve' in
the code below (from arr_print.h):

===

void print_ccb (Arrangement_2::Ccb_halfedge_const_circulator circ)
{
 Ccb_halfedge_const_circulator curr = circ;
 std::cout << "(" << curr->source()->point() << ")";
 do {
   Arrangement_2::Halfedge_const_handle he = curr->handle();
   std::cout << "   [" << he->curve() << "]   "
             << "(" << he->target()->point() << ")";
 } while (++curr != circ);
 std::cout << std::endl;
}

===
'cout << he->curve()' prints the circle to which the arc belongs and then
the endpoints. I would like to extract such information from he->curve(). If
I understood well, the return type of he->curve is
'Arrangement_2::X_monotone_curve_2', but I couldn't find the documentation
for it.

Could someone help me?

It is actually Traits::X_monotone_curve_2, where Traits is the type you used to instantiate your arrangement with, that is CGAL::Arr_circle_segment_traits_2<Kernel>. It is a model of ArrangementTraits_2 and there you can see some of the operations that apply to your curve.

Thanks,
--
Guilherme Kunigami
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Guilherme Kunigami