Polygon_repair/repair_polygon_2.cpp

#include <iostream>
#include <fstream>
 
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Polygon_repair/repair.h>
#include <CGAL/IO/WKT.h>
 
using Kernel = CGAL::Exact_predicates_inexact_constructions_kernel;
using Point_2 = Kernel::Point_2;
using Polygon_2 = CGAL::Polygon_2<Kernel>;
using Polygon_with_holes_2 = CGAL::Polygon_with_holes_2<Kernel>;
using Multipolygon_with_holes_2 = CGAL::Multipolygon_with_holes_2<Kernel>;
 
int main() {
  std::ifstream in("data/bridge-edge.wkt");
  Polygon_with_holes_2 pin;
  CGAL::IO::read_polygon_WKT(in, pin);
 
  Multipolygon_with_holes_2 mp = CGAL::Polygon_repair::repair(pin);
  if (mp.number_of_polygons_with_holes() > 1) {
    CGAL::IO::write_multi_polygon_WKT(std::cout, mp);
  } else {
    CGAL::IO::write_polygon_WKT(std::cout, mp.polygons_with_holes()[0]);
  }
 
  return 0;
}