CGAL 5.6.3 - 2D Arrangements

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Arrangement_on_surface_2/ellipses.cpp
// Constructing an arrangement of various conic arcs.
#include <CGAL/config.h>
#ifdef CGAL_USE_CORE
#include <CGAL/basic.h>
#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();
// Insert a full x-major ellipse
CGAL::insert(arr, ctr_cv(1, 4, 0, 0, 0, -16, CGAL::COUNTERCLOCKWISE,
Point(4,0), Point(0,2)));
CGAL::insert(arr, ctr_cv(1, 4, 0, 0, 0, -16, CGAL::COUNTERCLOCKWISE,
Point(0,2), Point(-4,0)));
CGAL::insert(arr, ctr_cv(1, 4, 0, 0, 0, -16, CGAL::COUNTERCLOCKWISE,
Point(-4,0), Point(0,-2)));
CGAL::insert(arr, ctr_cv(1, 4, 0, 0, 0, -16, CGAL::COUNTERCLOCKWISE,
Point(0,-2), Point(4,0)));
// Insert a full y-major ellipse
CGAL::insert(arr, ctr_cv(4, 1, 0, 0, 0, -16));
// Insert the full ellipse (x/4)^2 + (y/2)^2 = 1 clockwise rotated by
// phi = 36.87 degrees (such that sin(phi) = 0.6, cos(phi) = 0.8),
CGAL::insert(arr, ctr_cv(52, 73, 72, 0, 0, -400));
// Insert the full ellipse (x/4)^2 + (y/2)^2 = 1 counter clockwise rotated by
// phi = 36.87 degrees (such that sin(phi) = 0.6, cos(phi) = 0.8),
CGAL::insert(arr, ctr_cv(52, 73, -72, 0, 0, -400));
print_arrangement_size(arr);
CGAL::draw(arr);
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)
<>%</> inserts one or more curves or -monotone curves into a given arrangement, where no restrictions...
CGAL::draw
void draw(const PS &aps)
CGAL::COUNTERCLOCKWISE
const CGAL::Orientation COUNTERCLOCKWISE