ceph/src/boost/libs/geometry/doc/src/examples/io/wkt.cpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // QuickBook Example
   3
   4 // Copyright (c) 2014 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 //[wkt
  11 //` Shows the usage of wkt
  12
  13 #include <iostream>
  14
  15 #include <boost/geometry.hpp>
  16 #include <boost/geometry/geometries/point_xy.hpp>
  17 #include <boost/geometry/geometries/polygon.hpp>
  18
  19 int main()
  20 {
  21     namespace geom = boost::geometry;
  22     typedef geom::model::d2::point_xy<double> point_type;
  23
  24     point_type point = geom::make<point_type>(3, 6);
  25     geom::model::polygon<point_type> polygon;
  26     geom::append(geom::exterior_ring(polygon), geom::make<point_type>(0, 0));
  27     geom::append(geom::exterior_ring(polygon), geom::make<point_type>(0, 4));
  28     geom::append(geom::exterior_ring(polygon), geom::make<point_type>(4, 4));
  29     geom::append(geom::exterior_ring(polygon), geom::make<point_type>(4, 0));
  30     geom::append(geom::exterior_ring(polygon), geom::make<point_type>(0, 0));
  31
  32     std::cout << boost::geometry::wkt(point) << std::endl;
  33     std::cout << boost::geometry::wkt(polygon) << std::endl;
  34
  35     return 0;
  36 }
  37
  38 //]
  39
  40
  41 //[wkt_output
  42 /*`
  43 Output:
  44 [pre
  45 POINT(3 6)
  46 POLYGON((0 0,0 4,4 4,4 0,0 0))
  47 ]
  48
  49
  50 */
  51 //]