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

http://hadesmem.googlecode.com/ · C++ · 55 lines · 20 code · 16 blank · 19 comment · 0 complexity · 562e28d86afbf8ab0d1d094b3bca5ee0 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. //[envelope
  8. //` Shows how to calculate the bounding box of a polygon
  9. #include <iostream>
  10. #include <boost/geometry.hpp>
  11. #include <boost/geometry/geometries/box.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;
  19. boost::geometry::model::polygon<point> polygon;
  20. boost::geometry::read_wkt(
  21. "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)"
  22. "(4.0 2.0, 4.2 1.4, 4.8 1.9, 4.4 2.2, 4.0 2.0))", polygon);
  23. boost::geometry::model::box<point> box;
  24. boost::geometry::envelope(polygon, box);
  25. std::cout << "envelope:" << boost::geometry::dsv(box) << std::endl;
  26. /*<-*/ create_svg("envelope.svg", polygon, box); /*->*/
  27. return 0;
  28. }
  29. //]
  30. //[envelope_output
  31. /*`
  32. Output:
  33. [pre
  34. envelope:((2, 0.7), (5.4, 3))
  35. [$img/algorithms/envelope.png]
  36. ]
  37. */
  38. //]