/Src/Dependencies/Boost/libs/geometry/doc/src/examples/algorithms/intersection_poly_poly.cpp

http://hadesmem.googlecode.com/ · C++ · 66 lines · 28 code · 17 blank · 21 comment · 0 complexity · 24b9f20094eb5827c67d3c99a613b198 MD5 · raw file

  1. // Boost.Geometry (aka GGL, Generic Geometry Library)
  2. // QuickBook Example
  3. // Copyright (c) 2011 Barend Gehrels, Amsterdam, the Netherlands.
  4. // Use, modification and distribution is subject to the Boost Software License,
  5. // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  6. // http://www.boost.org/LICENSE_1_0.txt)
  7. //[intersection
  8. //` Shows the intersection of two polygons
  9. #include <iostream>
  10. #include <deque>
  11. #include <boost/geometry.hpp>
  12. #include <boost/geometry/geometries/point_xy.hpp>
  13. #include <boost/geometry/geometries/polygon.hpp>
  14. #include <boost/geometry/domains/gis/io/wkt/wkt.hpp>
  15. #include <boost/foreach.hpp>
  16. /*<-*/ #include "create_svg_overlay.hpp" /*->*/
  17. int main()
  18. {
  19. typedef boost::geometry::model::polygon<boost::geometry::model::d2::point_xy<double> > polygon;
  20. polygon green, blue;
  21. boost::geometry::read_wkt(
  22. "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)"
  23. "(4.0 2.0, 4.2 1.4, 4.8 1.9, 4.4 2.2, 4.0 2.0))", green);
  24. boost::geometry::read_wkt(
  25. "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);
  26. std::deque<polygon> output;
  27. boost::geometry::intersection(green, blue, output);
  28. int i = 0;
  29. std::cout << "green && blue:" << std::endl;
  30. BOOST_FOREACH(polygon const& p, output)
  31. {
  32. std::cout << i++ << ": " << boost::geometry::area(p) << std::endl;
  33. }
  34. /*<-*/ create_svg("intersection.svg", green, blue, output); /*->*/
  35. return 0;
  36. }
  37. //]
  38. //[intersection_output
  39. /*`
  40. Output:
  41. [pre
  42. green && blue:
  43. 0: 2.50205
  44. [$img/algorithms/intersection.png]
  45. ]
  46. */
  47. //]