CGAL 6.2 - 2D Arrangements

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Arrangement_on_surface_2/polycurve_geodesic.cpp
// Constructing an arrangement of polygeodesics.
#include <vector>
#include <list>
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Arr_geodesic_arc_on_sphere_traits_2.h>
#include <CGAL/Arr_spherical_topology_traits_2.h>
#include <CGAL/Arr_polyline_traits_2.h>
#include <CGAL/Arrangement_on_surface_2.h>
using Kernel = CGAL::Exact_predicates_exact_constructions_kernel;
using Segment_traits_2 = CGAL::Arr_geodesic_arc_on_sphere_traits_2<Kernel>;
using Poly_traits_2 = CGAL::Arr_polyline_traits_2<Segment_traits_2>;
using Point_2 = Poly_traits_2::Point_2;
using Poly_curve_2 = Poly_traits_2::Curve_2;
using X_poly_curve_2 = Poly_traits_2::X_monotone_curve_2;
using Topol_poly_traits_2 =
CGAL::Arr_spherical_topology_traits_2<Poly_traits_2>;
using Poly_arr =
CGAL::Arrangement_on_surface_2<Poly_traits_2, Topol_poly_traits_2>;
using Seg_curve_2 = Segment_traits_2::Curve_2;
using X_seg_curve_2 = Segment_traits_2::X_monotone_curve_2;
using Topol_segment_traits_2 =
CGAL::Arr_spherical_topology_traits_2<Segment_traits_2>;
using Segment_arr =
CGAL::Arrangement_on_surface_2<Segment_traits_2, Topol_segment_traits_2>;
int main() {
Segment_traits_2 seg_traits;
auto ctr_p = seg_traits.construct_point_2_object();
auto ctr_seg = seg_traits.construct_x_monotone_curve_2_object();
Point_2 p1 = ctr_p(0, 1, -1);
Point_2 p2 = ctr_p(-11, 7, -7);
Point_2 p3 = ctr_p(-1, 0, 0);
Point_2 p4 = ctr_p(-11, 7, 7);
Point_2 p5 = ctr_p(-1, 1, 1);
Segment_arr seg_arr(&seg_traits);
X_seg_curve_2 seg_cv1 = ctr_seg(p1, p2);
X_seg_curve_2 seg_cv2 = ctr_seg(p2, p3);
X_seg_curve_2 seg_cv3 = ctr_seg(p3, p4);
X_seg_curve_2 seg_cv4 = ctr_seg(p4, p5);
insert(seg_arr, seg_cv1);
insert(seg_arr, seg_cv2);
insert(seg_arr, seg_cv3);
insert(seg_arr, seg_cv4);
std::cout << "# seg. vertives: " << seg_arr.number_of_vertices() << std::endl;
std::list<Point_2> points;
points.push_back(p1);
points.push_back(p2);
points.push_back(p3);
points.push_back(p4);
points.push_back(p5);
Poly_traits_2 poly_traits;
auto ctr = poly_traits.construct_x_monotone_curve_2_object();
Poly_arr poly_arr(&poly_traits);
insert(poly_arr, ctr(seg_cv1));
insert(poly_arr, ctr(seg_cv2));
insert(poly_arr, ctr(seg_cv3));
insert(poly_arr, ctr(seg_cv4));
std::cout << "# poly vertives: " << poly_arr.number_of_vertices() << std::endl;
return 0;
}
CGAL::Arr_geodesic_arc_on_sphere_traits_2
The traits class Arr_geodesic_arc_on_sphere_traits_2 is a model of the AosTraits_2 concept.
Definition: Arr_geodesic_arc_on_sphere_traits_2.h:45
CGAL::Arr_polyline_traits_2
The traits class Arr_polyline_traits_2 handles piecewise linear curves, commonly referred to as polyl...
Definition: Arr_polyline_traits_2.h:94
CGAL::Arr_spherical_topology_traits_2
Definition: Arr_spherical_topology_traits_2.h:31
CGAL::Arrangement_on_surface_2
Definition: Arrangement_on_surface_2.h:60
CGAL::Exact_predicates_exact_constructions_kernel
Kernel::Point_2
Kernel