libs/geometry/doc/src/examples/geometries/adapted/boost_range/reversed.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 //[boost_range_reversed
  11 //` Shows how to use a Boost.Geometry linestring, reversed by Boost.Range adaptor
  12
  13 #include <iostream>
  14
  15 #include <boost/geometry.hpp>
  16 #include <boost/geometry/geometries/linestring.hpp>
  17 #include <boost/geometry/geometries/point_xy.hpp>
  18 #include <boost/geometry/geometries/adapted/boost_range/reversed.hpp>
  19
  20 int main()
  21 {
  22     typedef boost::geometry::model::d2::point_xy<int> xy;
  23     boost::geometry::model::linestring<xy> line;
  24     line.push_back(xy(0, 0));
  25     line.push_back(xy(1, 1));
  26
  27     std::cout
  28         << boost::geometry::dsv(line | boost::adaptors::reversed)
  29         << std::endl;
  30
  31     return 0;
  32 }
  33
  34 //]
  35
  36 //[boost_range_reversed_output
  37 /*`
  38 Output:
  39 [pre
  40 ((1, 1), (0, 0))
  41 ]
  42 */
  43 //]