Boolean_set_operations_2/do_intersect.cpp

#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Boolean_set_operations_2.h>

typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
typedef Kernel::Point_2                                   Point_2;
typedef CGAL::Polygon_2<Kernel>                           Polygon_2;

#include "print_utils.h"

int main ()
{
  Polygon_2 P;
  P.push_back (Point_2 (-1,1));
  P.push_back (Point_2 (0,-1));
  P.push_back (Point_2 (1,1));
  std::cout << "P = "; print_polygon (P);

  Polygon_2 Q;
  Q.push_back(Point_2 (-1,-1));
  Q.push_back(Point_2 (1,-1));
  Q.push_back(Point_2 (0,1));
  std::cout << "Q = "; print_polygon (Q);

  if ((CGAL::do_intersect (P, Q)))
    std::cout << "The two polygons intersect in their interior." << std::endl;
  else
    std::cout << "The two polygons do not intersect." << std::endl;

  return 0;
}