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 //[register_ring_templated
11 //` Show the use of the macro BOOST_GEOMETRY_REGISTER_RING_TEMPLATED
12
13 #include <iostream>
14 #include <deque>
15
16 #include <boost/geometry.hpp>
17 #include <boost/geometry/geometries/point_xy.hpp>
18 #include <boost/geometry/geometries/register/ring.hpp>
19
20 // Adapt any deque to Boost.Geometry Ring Concept
BOOST_GEOMETRY_REGISTER_RING_TEMPLATED(std::deque)21 BOOST_GEOMETRY_REGISTER_RING_TEMPLATED(std::deque)
22
23 int main()
24 {
25 std::deque<boost::geometry::model::d2::point_xy<double> > ring(3);
26 boost::geometry::assign_values(ring[0], 0, 0);
27 boost::geometry::assign_values(ring[2], 4, 1);
28 boost::geometry::assign_values(ring[1], 1, 4);
29
30 // Boost.Geometry algorithms work on any deque now
31 boost::geometry::correct(ring);
32 std::cout << "Area: " << boost::geometry::area(ring) << std::endl;
33 std::cout << "Contents: " << boost::geometry::wkt(ring) << std::endl;
34
35 return 0;
36 }
37
38 //]
39
40
41 //[register_ring_templated_output
42 /*`
43 Output:
44 [pre
45 Area: 7.5
46 Line: ((0, 0), (1, 4), (4, 1), (0, 0))
47 ]
48 */
49 //]
50