ceph/src/boost/libs/geometry/doc/src/examples/algorithms/make_inverse.cpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // QuickBook Example
   3
   4 // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
   5
   6 // Use, modification and distribution is subject to the Boost Software License,
   7 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 //[make_inverse
  11 //` Usage of make_inverse and expand to conveniently determine bounding box of several objects
  12
  13 #include <iostream>
  14
  15 #include <boost/geometry.hpp>
  16 #include <boost/geometry/geometries/box.hpp>
  17 #include <boost/geometry/geometries/point_xy.hpp>
  18
  19 using namespace boost::geometry;
  20
  21 int main()
  22 {
  23
  24     typedef model::d2::point_xy<double> point;
  25     typedef model::box<point> box;
  26
  27     box all = make_inverse<box>();
  28     std::cout << dsv(all) << std::endl;
  29     expand(all, make<box>(0, 0, 3, 4));
  30     expand(all, make<box>(2, 2, 5, 6));
  31     std::cout << dsv(all) << std::endl;
  32
  33     return 0;
  34 }
  35
  36 //]
  37
  38
  39 //[make_inverse_output
  40 /*`
  41 Output:
  42 [pre
  43 ((1.79769e+308, 1.79769e+308), (-1.79769e+308, -1.79769e+308))
  44 ((0, 0), (5, 6))
  45 ]
  46 */
  47 //]