ceph/src/boost/libs/geometry/doc/src/examples/algorithms/num_segments.cpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2 // QuickBook Example
   3
   4 // Copyright (c) 2014, Oracle and/or its affiliates
   5
   6 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
   7
   8 // Licensed under the Boost Software License version 1.0.
   9 // http://www.boost.org/users/license.html
  10
  11 //[num_segments
  12 //` Get the number of segments in a geometry
  13
  14 #include <iostream>
  15
  16 #include <boost/geometry.hpp>
  17 #include <boost/geometry/geometries/point_xy.hpp>
  18
  19
  20 int main()
  21 {
  22     boost::geometry::model::multi_polygon
  23         <
  24             boost::geometry::model::polygon
  25                 <
  26                     boost::geometry::model::d2::point_xy<double>, true, false // cw, open polygon
  27                 >
  28         > mp;
  29     boost::geometry::read_wkt("MULTIPOLYGON(((0 0,0 10,10 0),(1 1,8 1,1 8)),((10 10,10 20,20 10)))", mp);
  30     std::cout << "Number of segments: " << boost::geometry::num_segments(mp) << std::endl;
  31     return 0;
  32 }
  33
  34 //]
  35
  36
  37 //[num_segments_output
  38 /*`
  39 Output:
  40 [pre
  41  Number of segments: 9
  42 ]
  43 */
  44 //]