ceph/src/boost/libs/geometry/doc/src/examples/geometries/adapted/boost_tuple.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_tuple
  11 /*`
  12 Shows how to use Boost.Tuple points in Boost.Geometry
  13
  14 Working with Boost.Tuples in Boost.Geometry is straightforward and shown in
  15 various other examples as well.
  16
  17 */
  18
  19 #include <iostream>
  20
  21 #include <boost/geometry.hpp>
  22 #include <boost/geometry/geometries/polygon.hpp>
  23 #include <boost/geometry/geometries/adapted/boost_tuple.hpp>
  24
  25 BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
  26
  27 int main()
  28 {
  29     boost::geometry::model::polygon<boost::tuple<double, double> > poly;
  30     poly.outer().push_back(boost::make_tuple(1.0, 2.0));
  31     poly.outer().push_back(boost::make_tuple(6.0, 4.0));
  32     poly.outer().push_back(boost::make_tuple(5.0, 1.0));
  33     poly.outer().push_back(boost::make_tuple(1.0, 2.0));
  34
  35     std::cout << "Area: " << boost::geometry::area(poly) << std::endl;
  36     std::cout << "Contains (1.5, 2.5): "
  37         << std::boolalpha
  38         << boost::geometry::within(boost::make_tuple(1.5, 2.5), poly)
  39         << std::endl;
  40
  41     return 0;
  42 }
  43
  44 //]
  45
  46 //[boost_tuple_output
  47 /*`
  48 Output:
  49 [pre
  50 Area: 6.5
  51 Contains (1.5, 2.5): false
  52 ]
  53 */
  54 //]