ceph/src/boost/libs/geometry/doc/src/examples/geometries/register/linestring_templated.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 //[register_linestring_templated
  11 //` Show the use of the macro BOOST_GEOMETRY_REGISTER_LINESTRING_TEMPLATED
  12
  13 #include <iostream>
  14 #include <deque>
  15
  16 #include <boost/geometry.hpp>
  17 #include <boost/geometry/geometries/point_xy.hpp>
  18 #include <boost/geometry/geometries/register/linestring.hpp>
  19
  20 // Adapt any deque to Boost.Geometry Linestring Concept
  21 BOOST_GEOMETRY_REGISTER_LINESTRING_TEMPLATED(std::deque)
  22
  23 int main()
  24 {
  25     std::deque<boost::geometry::model::d2::point_xy<double> > line(2);
  26     boost::geometry::assign_values(line[0], 1, 1);
  27     boost::geometry::assign_values(line[1], 2, 2);
  28
  29     // Boost.Geometry algorithms work on any deque now
  30     std::cout << "Length: "  << boost::geometry::length(line) << std::endl;
  31     std::cout << "Line: "  << boost::geometry::dsv(line) << std::endl;
  32
  33     return 0;
  34 }
  35
  36 //]
  37
  38
  39 //[register_linestring_templated_output
  40 /*`
  41 Output:
  42 [pre
  43 Length: 1.41421
  44 Line: ((1, 1), (2, 2))
  45 ]
  46 */
  47 //]