ceph/src/boost/libs/geometry/doc/src/examples/geometries/point_xy.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 //[point_xy
  11 //` Declaration and use of the Boost.Geometry model::d2::point_xy, modelling the Point Concept
  12
  13 #include <iostream>
  14 #include <boost/geometry.hpp>
  15 #include <boost/geometry/geometries/point_xy.hpp>
  16
  17 namespace bg = boost::geometry;
  18
  19 int main()
  20 {
  21     bg::model::d2::point_xy<double> point1;
  22     bg::model::d2::point_xy<double> point2(1.0, 2.0); /*< Construct, assigning coordinates. >*/
  23
  24     bg::set<0>(point1, 1.0); /*< Set a coordinate, generic. >*/
  25     point1.y(2.0); /*< Set a coordinate, class-specific ([*Note]: prefer `bg::set()`). >*/
  26
  27     double x = bg::get<0>(point1); /*< Get a coordinate, generic. >*/
  28     double y = point1.y(); /*< Get a coordinate, class-specific ([*Note]: prefer `bg::get()`). >*/
  29
  30     std::cout << x << ", " << y << std::endl;
  31     return 0;
  32 }
  33
  34 //]
  35
  36
  37 //[point_xy_output
  38 /*`
  39 Output:
  40 [pre
  41 1, 2
  42 ]
  43 */
  44 //]