CGAL 6.2 - 2D Arrangements: Arrangement_on_surface_2/conic_multiplicities.cpp

CGAL 6.2 - 2D Arrangements

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Arrangement_on_surface_2/conic_multiplicities.cpp
// Handling intersection points with multiplicity between conic arcs.
#include <CGAL/config.h>
#ifdef CGAL_USE_CORE
#include <CGAL/Arr_naive_point_location.h>
#include "arr_conics.h"
#include "arr_print.h"
using Naive_pl = CGAL::Arr_naive_point_location<Arrangement>;
int main() {
Traits traits;
auto ctr_cv = traits.construct_curve_2_object();
Arrangement arr(&traits);
Naive_pl pl(arr);
// Insert a hyperbolic arc, supported by the hyperbola y = x^2/(1-x)
// (or: x^2 + xy - y = 0) with the endpoints (-1, 1/2) and (1/2, 1/2).
// Note that the arc is counterclockwise oriented.
Point ps1(-1, Rational(1,2));
Point pt1(Rational(1,2), Rational(1,2));
Conic_arc cv1 = ctr_cv(1, 0, 1, 0, -1, 0, CGAL::COUNTERCLOCKWISE, ps1, pt1);
// insert(arr, cv1, pl);
#if 0
// Insert the bottom half of the circle centered at (0, 1/2) whose radius
// is 1/2 (therefore its squared radius is 1/4).
Rat_circle circ2(Rat_point(0, Rational(1,2)), Rational(1,4));
Point ps2(-Rational(1,2), Rational(1,2));
Point pt2(Rational(1,2), Rational(1,2));
Conic_arc cv2 = ctr_cv(circ2, CGAL::COUNTERCLOCKWISE, ps2, pt2);
insert(arr, cv2, pl);
#endif
print_arrangement(arr);
return 0;
}
#else
#include <iostream>
int main ()
{
std::cout << "Sorry, this example needs GMP and CORE\n";
return 0;
}
#endif
CGAL::Arr_naive_point_location
Definition: Arr_naive_point_location.h:20
CGAL::COUNTERCLOCKWISE
const CGAL::Orientation COUNTERCLOCKWISE