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 //[append
11 //` Shows usage of Boost.Geometry's append to append a point or a range to a polygon
12
13 #include <iostream>
14
15 #include <boost/geometry.hpp>
16 #include <boost/geometry/geometries/polygon.hpp>
17 #include <boost/geometry/geometries/adapted/boost_tuple.hpp>
18
19 #include <boost/assign.hpp> /*< At the end to avoid conflicts with Boost.QVM >*/
20
BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)21 BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
22
23 int main()
24 {
25 using boost::assign::tuple_list_of;
26 using boost::make_tuple;
27 using boost::geometry::append;
28
29 typedef boost::geometry::model::polygon<boost::tuple<int, int> > polygon;
30
31 polygon poly;
32
33 // Append a range
34 append(poly, tuple_list_of(0, 0)(0, 10)(11, 11)(10, 0)); /*< tuple_list_of delivers a range and can therefore be used in boost::geometry::append >*/
35 // Append a point (in this case the closing point)
36 append(poly, make_tuple(0, 0));
37
38 // Create an interior ring (append does not do this automatically)
39 boost::geometry::interior_rings(poly).resize(1);
40
41 // Append a range to the interior ring
42 append(poly, tuple_list_of(2, 2)(2, 5)(6, 6)(5, 2), 0); /*< The last parameter ring_index 0 denotes the first interior ring >*/
43 // Append a point to the first interior ring
44 append(poly, make_tuple(2, 2), 0);
45
46 std::cout << boost::geometry::dsv(poly) << std::endl;
47
48 return 0;
49 }
50
51 //]
52
53
54 //[append_output
55 /*`
56 Output:
57 [pre
58 (((0, 0), (0, 10), (11, 11), (10, 0), (0, 0)), ((2, 2), (2, 5), (6, 6), (5, 2), (2, 2)))
59 ]
60 */
61 //]
62