ceph/src/boost/libs/geometry/doc/src/examples/algorithms/make_with_range.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 //[make_with_range
  11 //` Using make to construct a linestring with two different range types
  12
  13 #include <iostream>
  14
  15 #include <boost/geometry.hpp>
  16 #include <boost/geometry/geometries/linestring.hpp>
  17 #include <boost/geometry/geometries/point_xy.hpp>
  18 #include <boost/geometry/geometries/adapted/c_array.hpp>
  19
  20 BOOST_GEOMETRY_REGISTER_C_ARRAY_CS(cs::cartesian) /*< Necessary to register a C array like {1,2} as a point >*/
  21
  22 int main()
  23 {
  24     using boost::geometry::make;
  25     using boost::geometry::detail::make::make_points;
  26
  27     typedef boost::geometry::model::d2::point_xy<double> point;
  28     typedef boost::geometry::model::linestring<point> linestring;
  29
  30     double coordinates[][2] = {{1,2}, {3,4}, {5, 6}}; /*< Initialize with C array points >*/
  31     linestring ls = make_points<linestring>(coordinates);
  32     std::cout << boost::geometry::dsv(ls) << std::endl;
  33
  34     point points[3] = { make<point>(9,8), make<point>(7,6), make<point>(5,4) }; /*< Construct array with points, using make which should work for any point type >*/
  35     std::cout << boost::geometry::dsv(make_points<linestring>(points)) << std::endl; /*< Construct linestring with point-array and output it as Delimiter Separated Values >*/
  36
  37     return 0;
  38 }
  39
  40 //]
  41
  42
  43 //[make_with_range_output
  44 /*`
  45 Output:
  46 [pre
  47 ((1, 2), (3, 4), (5, 6))
  48 ((9, 8), (7, 6), (5, 4))
  49 ]
  50 */
  51 //]