strategy/cartesian/area_box.hpp

0001 // Boost.Geometry
0002
0003 // Copyright (c) 2021, Oracle and/or its affiliates.
0004
0005 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
0006
0007 // Licensed under the Boost Software License version 1.0.
0008 // http://www.boost.org/users/license.html
0009
0010 #ifndef BOOST_GEOMETRY_STRATEGY_CARTESIAN_AREA_BOX_HPP
0011 #define BOOST_GEOMETRY_STRATEGY_CARTESIAN_AREA_BOX_HPP
0012
0013
0014 #include <boost/geometry/core/access.hpp>
0015 #include <boost/geometry/strategy/area.hpp>
0016
0017
0018 namespace boost { namespace geometry
0019 {
0020
0021 namespace strategy { namespace area
0022 {
0023
0024 template
0025 <
0026     typename CalculationType = void
0027 >
0028 class cartesian_box
0029 {
0030 public:
0031     template <typename Box>
0032     struct result_type
0033         : strategy::area::detail::result_type
0034             <
0035                 Box,
0036                 CalculationType
0037             >
0038     {};
0039
0040     template <typename Box>
0041     static inline auto apply(Box const& box)
0042     {
0043         typedef typename result_type<Box>::type return_type;
0044
0045         return return_type(get<max_corner, 0>(box) - get<min_corner, 0>(box))
0046              * return_type(get<max_corner, 1>(box) - get<min_corner, 1>(box));
0047     }
0048 };
0049
0050
0051 }} // namespace strategy::area
0052
0053
0054 }} // namespace boost::geometry
0055
0056
0057 #endif // BOOST_GEOMETRY_STRATEGY_CARTESIAN_AREA_BOX_HPP