ceph/src/boost/libs/geometry/doc/src/examples/algorithms/expand.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 //[expand
  11 //` Shows the usage of expand
  12
  13 #include <iostream>
  14 #include <list>
  15
  16 #include <boost/geometry.hpp>
  17 #include <boost/geometry/geometries/box.hpp>
  18 #include <boost/geometry/geometries/point_xy.hpp>
  19
  20 int main()
  21 {
  22     typedef boost::geometry::model::d2::point_xy<short int> point_type;
  23     typedef boost::geometry::model::box<point_type> box_type;
  24
  25     using boost::geometry::expand;
  26
  27     box_type box = boost::geometry::make_inverse<box_type>(); /*< expand is usually preceded by a call to assign_inverse or make_inverse  >*/
  28
  29     expand(box, point_type(0, 0));
  30     expand(box, point_type(1, 2));
  31     expand(box, point_type(5, 4));
  32     expand(box, boost::geometry::make<box_type>(3, 3, 5, 5));
  33
  34     std::cout << boost::geometry::dsv(box) << std::endl;
  35
  36     return 0;
  37 }
  38
  39 //]
  40
  41 //[expand_output
  42 /*`
  43 Output:
  44 [pre
  45 ((0, 0), (5, 5))
  46 ]
  47 */
  48 //]