| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| // QuickBook Example |
| |
| // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands. |
| |
| // Use, modification and distribution is subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| |
| //[register_box_2d_4values |
| //` Show the use of the macro BOOST_GEOMETRY_REGISTER_BOX_2D_4VALUES |
| |
| #include <iostream> |
| #include <boost/geometry.hpp> |
| #include <boost/geometry/geometries/register/point.hpp> |
| #include <boost/geometry/geometries/register/box.hpp> |
| |
| struct my_point |
| { |
| int x, y; |
| }; |
| |
| struct my_box |
| { |
| int left, top, right, bottom; |
| }; |
| |
| BOOST_GEOMETRY_REGISTER_POINT_2D(my_point, int, cs::cartesian, x, y) |
| |
| // Register the box type, also notifying that it is based on "my_point" |
| // (even if it does not contain it) |
| BOOST_GEOMETRY_REGISTER_BOX_2D_4VALUES(my_box, my_point, left, top, right, bottom) |
| |
| int main() |
| { |
| my_box b = boost::geometry::make<my_box>(0, 0, 2, 2); |
| std::cout << "Area: " << boost::geometry::area(b) << std::endl; |
| return 0; |
| } |
| |
| //] |
| |
| |
| //[register_box_2d_4values_output |
| /*` |
| Output: |
| [pre |
| Area: 4 |
| ] |
| */ |
| //] |
