ceph/src/boost/libs/geometry/doc/src/examples/geometries/adapted/boost_array.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_array
  11 //` Shows how to use a Boost.Array using Boost.Geometry's distance, set and assign_values algorithms
  12
  13 #include <iostream>
  14
  15 #include <boost/geometry.hpp>
  16 #include <boost/geometry/geometries/linestring.hpp>
  17 #include <boost/geometry/geometries/adapted/boost_array.hpp>
  18
  19 BOOST_GEOMETRY_REGISTER_BOOST_ARRAY_CS(cs::cartesian)
  20
  21 int main()
  22 {
  23     boost::array<float, 2> a = { {1, 2} };
  24     boost::array<double, 2> b = { {2, 3} };
  25     std::cout << boost::geometry::distance(a, b) << std::endl;
  26
  27     boost::geometry::set<0>(a, 1.1f);
  28     boost::geometry::set<1>(a, 2.2f);
  29     std::cout << boost::geometry::distance(a, b) << std::endl;
  30
  31     boost::geometry::assign_values(b, 2.2, 3.3);
  32     std::cout << boost::geometry::distance(a, b) << std::endl;
  33
  34     boost::geometry::model::linestring<boost::array<double, 2> > line;
  35     line.push_back(b);
  36
  37     return 0;
  38 }
  39
  40 //]
  41
  42 //[boost_array_output
  43 /*`
  44 Output:
  45 [pre
  46 1.41421
  47 1.20416
  48 1.55563
  49 ]
  50 */
  51 //]