ceph/src/boost/libs/geometry/doc/src/examples/geometries/adapted/boost_range/sliced.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_sliced
  11 //` Shows how to use a Boost.Geometry linestring, sliced by Boost.Range adaptor
  12
  13 #include <iostream>
  14
  15 #include <boost/assign.hpp>
  16
  17 #include <boost/geometry.hpp>
  18 #include <boost/geometry/geometries/linestring.hpp>
  19 #include <boost/geometry/geometries/point_xy.hpp>
  20 #include <boost/geometry/geometries/adapted/boost_range/sliced.hpp>
  21
  22
  23 int main()
  24 {
  25     using namespace boost::assign;
  26
  27     typedef boost::geometry::model::d2::point_xy<int> xy;
  28     boost::geometry::model::linestring<xy> line;
  29     line += xy(0, 0);
  30     line += xy(1, 1);
  31     line += xy(2, 2);
  32     line += xy(3, 3);
  33     line += xy(4, 4);
  34
  35     std::cout
  36         << boost::geometry::dsv(line | boost::adaptors::sliced(1, 3)) << std::endl;
  37
  38     return 0;
  39 }
  40
  41 //]
  42
  43 //[boost_range_sliced_output
  44 /*`
  45 Output:
  46 [pre
  47 ((1, 1), (2, 2))
  48 ]
  49 */
  50 //]