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

CGAL 6.2 - 2D Arrangements

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Arrangement_on_surface_2/linear_conics.cpp
// Constructing an arrangement of various conic arcs.
#include <CGAL/config.h>
#ifdef CGAL_USE_CORE
#include <CGAL/draw_arrangement_2.h>
#include "arr_conics.h"
#include "arr_print.h"
int main() {
Traits traits;
Arrangement arr(&traits);
auto ctr_cv = traits.construct_curve_2_object();
Point p0(0, 0);
Point p1(-1, 0);
Point p2(0, -1);
Point p3(0, 1);
Point p4(1, 0);
Point p5(Rational(1, 2), Rational(1, 2));
Point p6(Rational(-1, 2), Rational(1, 2));
Rat_point rp0(0, 0);
Rat_point rp1(1, 0);
Rat_point rp2(0, 1);
Rat_point rp3(0, -1);
// horizontal
// insert the segment (0, 0)--(1, 0).
CGAL::insert(arr, ctr_cv(Rat_segment(rp0, rp1)));
// insert the segment (0, 0)--(-1, 0).
CGAL::insert(arr, ctr_cv(0, 0, 0, 0, 1, 0, CGAL::COLLINEAR, p0, p1));
// vertical
// insert the segment (0, -1)--(0, 0).
CGAL::insert(arr, ctr_cv(Rat_segment(rp3, rp0)));
// translated
// insert the segment (0, -1)--(1, 0).
CGAL::insert(arr, ctr_cv(Rat_segment(rp3, rp1)));
// insert the segment (0, -1)--(-1, 0).
CGAL::insert(arr, ctr_cv(0, 0, 0, -1, -1, -1, CGAL::COLLINEAR, p2, p1));
// Special segments
// horizontal special segment
CGAL::insert(arr, ctr_cv(p5, p6));
// vertical special segment
CGAL::insert(arr, ctr_cv(p0, p3));
// special translated
CGAL::insert(arr, ctr_cv(p1, p3));
CGAL::insert(arr, ctr_cv(p3, p4));
print_arrangement_size(arr);
CGAL::draw(arr, "linear_conics");
return 0;
}
#else
#include <iostream>
int main() {
std::cout << "Sorry, this example needs GMP and CORE\n";
return 0;
}
#endif
CGAL::insert
void insert(Arrangement_2< Traits, Dcel > &arr, const Curve &c, const PointLocation &pl=walk_pl)
The function insert inserts one or more curves or -monotone curves into a given arrangement,...
CGAL::draw
void draw(const PS2 &ps2, const GSOptions &gso)
CGAL::COLLINEAR
const CGAL::Orientation COLLINEAR