1 // Boost.Geometry (aka GGL, Generic Geometry Library)
2
3 // Copyright (c) 2014 Barend Gehrels, Amsterdam, the Netherlands.
4 // Copyright (c) 2014 Bruno Lalande, Paris, France.
5 // Copyright (c) 2014 Mateusz Loskot, London, UK.
6 // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
7
8 // Use, modification and distribution is subject to the Boost Software License,
9 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
10 // http://www.boost.org/LICENSE_1_0.txt)
11
12 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_GET_MAX_SIZE_HPP
13 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_GET_MAX_SIZE_HPP
14
15
16 #include <cstddef>
17
18 #include <boost/geometry/core/access.hpp>
19 #include <boost/geometry/util/math.hpp>
20
21 namespace boost { namespace geometry
22 {
23
24 #ifndef DOXYGEN_NO_DETAIL
25 namespace detail
26 {
27
28 template <typename Box, std::size_t Dimension>
29 struct get_max_size_box
30 {
applyboost::geometry::detail::get_max_size_box31 static inline typename coordinate_type<Box>::type apply(Box const& box)
32 {
33 typename coordinate_type<Box>::type s
34 = geometry::math::abs(geometry::get<1, Dimension>(box) - geometry::get<0, Dimension>(box));
35
36 return (std::max)(s, get_max_size_box<Box, Dimension - 1>::apply(box));
37 }
38 };
39
40 template <typename Box>
41 struct get_max_size_box<Box, 0>
42 {
applyboost::geometry::detail::get_max_size_box43 static inline typename coordinate_type<Box>::type apply(Box const& box)
44 {
45 return geometry::math::abs(geometry::get<1, 0>(box) - geometry::get<0, 0>(box));
46 }
47 };
48
49 // This might be implemented later on for other geometries too.
50 // Not dispatched yet.
51 template <typename Box>
get_max_size(Box const & box)52 inline typename coordinate_type<Box>::type get_max_size(Box const& box)
53 {
54 return get_max_size_box<Box, dimension<Box>::value - 1>::apply(box);
55 }
56
57 } // namespace detail
58 #endif // DOXYGEN_NO_DETAIL
59
60
61 }} // namespace boost::geometry
62
63
64 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_GET_MAX_SIZE_HPP
65