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_2d_point
11 //` Shows the usage of make as a generic constructor for different point types
12
13 #include <iostream>
14
15 #include <boost/geometry.hpp>
16 #include <boost/geometry/geometries/point_xy.hpp>
17 #include <boost/geometry/geometries/register/point.hpp>
18 #include <boost/geometry/geometries/adapted/boost_tuple.hpp>
19 #include <boost/geometry/geometries/adapted/boost_polygon/point.hpp>
20
21 BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
22
23 struct mypoint { float _x, _y; };
24
BOOST_GEOMETRY_REGISTER_POINT_2D(mypoint,float,cs::cartesian,_x,_y)25 BOOST_GEOMETRY_REGISTER_POINT_2D(mypoint, float, cs::cartesian, _x, _y)
26
27 template <typename Point>
28 void construct_and_display()
29 {
30 using boost::geometry::make;
31 using boost::geometry::get;
32
33 Point p = make<Point>(1, 2);
34
35 std::cout << "x=" << get<0>(p) << " y=" << get<1>(p)
36 << " (" << typeid(Point).name() << ")"
37 << std::endl;
38 }
39
main()40 int main()
41 {
42 construct_and_display<boost::geometry::model::d2::point_xy<double> >();
43 construct_and_display<boost::geometry::model::d2::point_xy<int> >();
44 construct_and_display<boost::tuple<double, double> >();
45 construct_and_display<boost::polygon::point_data<int> >();
46 construct_and_display<mypoint>();
47 return 0;
48 }
49
50 //]
51
52 //[make_2d_point_output
53 /*`
54 Output (compiled using gcc):
55 [pre
56 x=1 y=2 (N5boost8geometry5model2d28point_xyIdNS0_2cs9cartesianEEE)
57 x=1 y=2 (N5boost8geometry5model2d28point_xyIiNS0_2cs9cartesianEEE)
58 x=1 y=2 (N5boost6tuples5tupleIddNS0_9null_typeES2_S2_S2_S2_S2_S2_S2_EE)
59 x=1 y=2 (N5boost7polygon10point_dataIiEE)
60 x=1 y=2 (7mypoint)
61 ]
62 */
63 //]
64