text: // Boost.Geometry (aka GGL, Generic Geometry Library)
  // QuickBook Example
  
  // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
  
  // Use, modification and distribution is subject to the Boost Software License,
  // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  // http://www.boost.org/LICENSE_1_0.txt)
  
  //[intersection
  //` Shows the intersection of two polygons
  
  #include <iostream>
  #include <deque>
  
  #include <boost/geometry.hpp>
  #include <boost/geometry/geometries/point_xy.hpp>
  #include <boost/geometry/geometries/polygon.hpp>
  
  #include <boost/foreach.hpp>
  /*<-*/ #include "create_svg_overlay.hpp" /*->*/
  
  int main()
  {
      typedef boost::geometry::model::polygon<boost::geometry::model::d2::point_xy<double> > polygon;
  
      polygon green, blue;
  
      boost::geometry::read_wkt(
          "POLYGON((2 1.3,2.4 1.7,2.8 1.8,3.4 1.2,3.7 1.6,3.4 2,4.1 3,5.3 2.6,5.4 1.2,4.9 0.8,2.9 0.7,2 1.3)"
              "(4.0 2.0, 4.2 1.4, 4.8 1.9, 4.4 2.2, 4.0 2.0))", green);
  
      boost::geometry::read_wkt(
          "POLYGON((4.0 -0.5 , 3.5 1.0 , 2.0 1.5 , 3.5 2.0 , 4.0 3.5 , 4.5 2.0 , 6.0 1.5 , 4.5 1.0 , 4.0 -0.5))", blue);
  
      std::deque<polygon> output;
      boost::geometry::intersection(green, blue, output);
  
      int i = 0;
      std::cout << "green && blue:" << std::endl;
      BOOST_FOREACH(polygon const& p, output)
      {
          std::cout << i++ << ": " << boost::geometry::area(p) << std::endl;
      }
  
      /*<-*/ create_svg("intersection.svg", green, blue, output); /*->*/
      return 0;
  }
  
  //]
  
  
  //[intersection_output
  /*`
  Output:
  [pre
  green && blue:
  0: 2.50205
  
  [$img/algorithms/intersection.png]
  
  ]
  */
  //]
  
  