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 //[transform
11 //` Shows how points can be transformed using the default strategy
12
13 #include <iostream>
14 #include <boost/geometry.hpp>
15
16
main()17 int main()
18 {
19 namespace bg = boost::geometry;
20
21 // Select a point near the pole (theta=5.0, phi=15.0)
22 bg::model::point<long double, 2, bg::cs::spherical<bg::degree> > p1(15.0, 5.0);
23
24 // Transform from degree to radian. Default strategy is automatically selected,
25 // it will convert from degree to radian
26 bg::model::point<long double, 2, bg::cs::spherical<bg::radian> > p2;
27 bg::transform(p1, p2);
28
29 // Transform from degree (lon-lat) to 3D (x,y,z). Default strategy is automatically selected,
30 // it will consider points on a unit sphere
31 bg::model::point<long double, 3, bg::cs::cartesian> p3;
32 bg::transform(p1, p3);
33
34 std::cout
35 << "p1: " << bg::dsv(p1) << std::endl
36 << "p2: " << bg::dsv(p2) << std::endl
37 << "p3: " << bg::dsv(p3) << std::endl;
38
39 return 0;
40 }
41
42 //]
43
44
45 //[transform_output
46 /*`
47 Output:
48 [pre
49 p1: (15, 5)
50 p2: (0.261799, 0.0872665)
51 p3: (0.084186, 0.0225576, 0.996195)
52 ]
53 */
54 //]
55