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 //[intersection_segment
11 //` Calculate the intersection point (or points) of two segments
12
13 #include <iostream>
14
15 #include <boost/geometry.hpp>
16 #include <boost/geometry/geometries/point_xy.hpp>
17
18 #include <boost/foreach.hpp>
19
20
main()21 int main()
22 {
23 typedef boost::geometry::model::d2::point_xy<double> P;
24 boost::geometry::model::segment<P> segment1, segment2;
25 boost::geometry::read_wkt("linestring(1 1,2 2)", segment1);
26 boost::geometry::read_wkt("linestring(2 1,1 2)", segment2);
27
28 std::vector<P> intersections;
29 boost::geometry::intersection(segment1, segment2, intersections);
30
31 BOOST_FOREACH(P const& p, intersections)
32 {
33 std::cout << " " << boost::geometry::wkt(p);
34 }
35 std::cout << std::endl;
36
37 return 0;
38 }
39
40 //]
41
42
43 //[intersection_segment_output
44 /*`
45 Output:
46 [pre
47 POINT(1.5 1.5)
48 ]
49 */
50 //]
51