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

http://hadesmem.googlecode.com/ · C++ · 52 lines · 20 code · 12 blank · 20 comment · 0 complexity · ad0babcfac149a6fcacd9ae85bf8b209 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. //[within
  8. //` Shows how to detect if a point is inside a polygon, or not
  9. #include <iostream>
  10. #include <list>
  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 "create_svg_two.hpp" /*->*/
  16. int main()
  17. {
  18. typedef boost::geometry::model::d2::point_xy<double> point_type;
  19. typedef boost::geometry::model::polygon<point_type> polygon_type;
  20. polygon_type poly;
  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))", poly);
  24. point_type p(4, 1);
  25. std::cout << "within: " << (boost::geometry::within(p, poly) ? "yes" : "no") << std::endl;
  26. /*<-*/ create_svg("within.svg", poly, p); /*->*/
  27. return 0;
  28. }
  29. //]
  30. //[within_output
  31. /*`
  32. Output:
  33. [pre
  34. within: yes
  35. [$img/algorithms/within.png]
  36. ]
  37. */
  38. //]