projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
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 | //[register_point_2d | |
| 11 | //` Show the use of the macro BOOST_GEOMETRY_REGISTER_POINT_2D | |
| 12 | ||
| 13 | #include <iostream> | |
| 14 | #include <boost/geometry.hpp> | |
| 15 | #include <boost/geometry/geometries/register/point.hpp> | |
| 16 | ||
| 17 | /*< Somewhere, any legacy point struct is defined >*/ | |
| 18 | struct legacy_point | |
| 19 | { | |
| 20 | double x, y; | |
| 21 | }; | |
| 22 | ||
| 23 | BOOST_GEOMETRY_REGISTER_POINT_2D(legacy_point, double, cs::cartesian, x, y) /*< The magic: adapt it to Boost.Geometry Point Concept >*/ | |
| 24 | ||
| 25 | int main() | |
| 26 | { | |
| 27 | legacy_point p1, p2; | |
| 28 | ||
| 29 | namespace bg = boost::geometry; | |
| 30 | ||
| 31 | /*< Any Boost.Geometry function can be used for legacy point now. Here: assign_values and distance >*/ | |
| 32 | bg::assign_values(p1, 1, 1); | |
| 33 | bg::assign_values(p2, 2, 2); | |
| 34 | ||
| 35 | double d = bg::distance(p1, p2); | |
| 36 | ||
| 37 | std::cout << "Distance: " << d << std::endl; | |
| 38 | ||
| 39 | return 0; | |
| 40 | } | |
| 41 | ||
| 42 | //] | |
| 43 | ||
| 44 | ||
| 45 | //[register_point_2d_output | |
| 46 | /*` | |
| 47 | Output: | |
| 48 | [pre | |
| 49 | Distance: 1.41421 | |
| 50 | ] | |
| 51 | */ | |
| 52 | //] |