ceph/src/boost/libs/geometry/doc/src/examples/geometries/point.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
  11 //` Declaration and use of the Boost.Geometry model::point, modelling the Point Concept
  12
  13 #include <iostream>
  14 #include <boost/geometry.hpp>
  15
  16 namespace bg = boost::geometry;
  17
  18 int main()
  19 {
  20     bg::model::point<double, 2, bg::cs::cartesian> point1;
  21     bg::model::point<double, 3, bg::cs::cartesian> point2(1.0, 2.0, 3.0); /*< Construct, assigning three coordinates >*/
  22
  23     bg::set<0>(point1, 1.0); /*< Set a coordinate, generic. >*/
  24     point1.set<1>(2.0); /*< Set a coordinate, class-specific ([*Note]: prefer `bg::set()`). >*/
  25
  26     double x = bg::get<0>(point1); /*< Get a coordinate, generic. >*/
  27     double y = point1.get<1>(); /*< Get a coordinate, class-specific ([*Note]: prefer `bg::get()`). >*/
  28
  29     std::cout << x << ", " << y << std::endl;
  30     return 0;
  31 }
  32
  33 //]
  34
  35
  36 //[point_output
  37 /*`
  38 Output:
  39 [pre
  40 1, 2
  41 ]
  42 */
  43 //]