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 //[assign
11 //` Shows how to assign a geometry from another geometry
12
13 #include <iostream>
14
15 #include <boost/geometry.hpp>
16 #include <boost/geometry/geometries/box.hpp>
17 #include <boost/geometry/geometries/point_xy.hpp>
18 #include <boost/geometry/geometries/polygon.hpp>
19 #include <boost/geometry/geometries/adapted/boost_tuple.hpp>
20
BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)21 BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
22
23 int main()
24 {
25 typedef boost::geometry::model::d2::point_xy<double> point;
26 typedef boost::geometry::model::box<point> box;
27 typedef boost::geometry::model::polygon<point> polygon;
28
29 point p1;
30 box b;
31 boost::geometry::assign_values(p1, 1, 1);
32 boost::geometry::assign_values(b, 1, 1, 2, 2);
33
34 // Assign a box to a polygon (target = source)
35 polygon p;
36 boost::geometry::assign(p, b);
37
38 // Assign a point to another point type (conversion of point-type)
39 boost::tuple<double, double> p2;
40 boost::geometry::assign(p2, p1);
41
42 using boost::geometry::dsv;
43 std::cout
44 << "box: " << dsv(b) << std::endl
45 << "polygon: " << dsv(p) << std::endl
46 << "point: " << dsv(p1) << std::endl
47 << "point tuples: " << dsv(p2) << std::endl
48 ;
49
50 return 0;
51 }
52
53 //]
54
55
56 //[assign_output
57 /*`
58 Output:
59 [pre
60 box: ((1, 1), (2, 2))
61 polygon: (((1, 1), (1, 2), (2, 2), (2, 1), (1, 1)))
62 point: (1, 1)
63 point tuples: (1, 1)
64 ]
65 */
66 //]
67