CGAL 5.3 - 2D Arrangements
// Answering vertical ray-shooting queries.
#include <CGAL/Cartesian.h>
#include <CGAL/MP_Float.h>
#include <CGAL/Arr_segment_traits_2.h>
#include <CGAL/Arrangement_2.h>
#include <CGAL/Arr_walk_along_line_point_location.h>
#include <CGAL/Arr_trapezoid_ric_point_location.h>
#include "point_location_utils.h"
typedef CGAL::MP_Float Number_type;
typedef Traits_2::Point_2 Point_2;
typedef CGAL::Arrangement_2<Traits_2> Arrangement_2;
int main ()
// Construct the arrangement.
Arrangement_2 arr;
Walk_pl walk_pl (arr);
Trap_pl trap_pl;
construct_segments_arr (arr);
// Perform some vertical ray-shooting queries using the walk strategy.
Point_2 q1 (1, 4);
Point_2 q2 (4, 3);
Point_2 q3 (6, 3);
vertical_ray_shooting_query (walk_pl, q1);
vertical_ray_shooting_query (walk_pl, q2);
vertical_ray_shooting_query (walk_pl, q3);
// Attach the trapezoid-RIC object to the arrangement and perform queries.
Point_2 q4 (3, 2);
Point_2 q5 (5, 2);
Point_2 q6 (1, 0);
trap_pl.attach (arr);
vertical_ray_shooting_query (trap_pl, q4);
vertical_ray_shooting_query (trap_pl, q5);
vertical_ray_shooting_query (trap_pl, q6);
return 0;