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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | ||
3 | // Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands. | |
4 | // Copyright (c) 2008-2015 Bruno Lalande, Paris, France. | |
5 | // Copyright (c) 2009-2015 Mateusz Loskot, London, UK. | |
6 | ||
7 | // This file was modified by Oracle on 2015. | |
8 | // Modifications copyright (c) 2015, Oracle and/or its affiliates. | |
9 | ||
10 | // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle | |
11 | ||
12 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library | |
13 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. | |
14 | ||
15 | // Distributed under the Boost Software License, Version 1.0. | |
16 | // (See accompanying file LICENSE_1_0.txt or copy at | |
17 | // http://www.boost.org/LICENSE_1_0.txt) | |
18 | ||
19 | #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INTERFACE_HPP | |
20 | #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INTERFACE_HPP | |
21 | ||
22 | #include <boost/variant/apply_visitor.hpp> | |
23 | #include <boost/variant/static_visitor.hpp> | |
24 | #include <boost/variant/variant_fwd.hpp> | |
25 | ||
26 | #include <boost/geometry/geometries/concepts/check.hpp> | |
27 | ||
28 | #include <boost/geometry/algorithms/dispatch/envelope.hpp> | |
29 | ||
30 | ||
31 | namespace boost { namespace geometry | |
32 | { | |
33 | ||
34 | namespace resolve_variant | |
35 | { | |
36 | ||
37 | template <typename Geometry> | |
38 | struct envelope | |
39 | { | |
40 | template <typename Box> | |
41 | static inline void apply(Geometry const& geometry, Box& box) | |
42 | { | |
43 | concepts::check<Geometry const>(); | |
44 | concepts::check<Box>(); | |
45 | ||
46 | dispatch::envelope<Geometry>::apply(geometry, box); | |
47 | } | |
48 | }; | |
49 | ||
50 | template <BOOST_VARIANT_ENUM_PARAMS(typename T)> | |
51 | struct envelope<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> > | |
52 | { | |
53 | template <typename Box> | |
54 | struct visitor: boost::static_visitor<void> | |
55 | { | |
56 | Box& m_box; | |
57 | ||
58 | visitor(Box& box): m_box(box) {} | |
59 | ||
60 | template <typename Geometry> | |
61 | void operator()(Geometry const& geometry) const | |
62 | { | |
63 | envelope<Geometry>::apply(geometry, m_box); | |
64 | } | |
65 | }; | |
66 | ||
67 | template <typename Box> | |
68 | static inline void | |
69 | apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry, | |
70 | Box& box) | |
71 | { | |
72 | boost::apply_visitor(visitor<Box>(box), geometry); | |
73 | } | |
74 | }; | |
75 | ||
76 | } // namespace resolve_variant | |
77 | ||
78 | ||
79 | /*! | |
80 | \brief \brief_calc{envelope} | |
81 | \ingroup envelope | |
82 | \details \details_calc{envelope,\det_envelope}. | |
83 | \tparam Geometry \tparam_geometry | |
84 | \tparam Box \tparam_box | |
85 | \param geometry \param_geometry | |
86 | \param mbr \param_box \param_set{envelope} | |
87 | ||
88 | \qbk{[include reference/algorithms/envelope.qbk]} | |
89 | \qbk{ | |
90 | [heading Example] | |
91 | [envelope] [envelope_output] | |
92 | } | |
93 | */ | |
94 | template<typename Geometry, typename Box> | |
95 | inline void envelope(Geometry const& geometry, Box& mbr) | |
96 | { | |
97 | resolve_variant::envelope<Geometry>::apply(geometry, mbr); | |
98 | } | |
99 | ||
100 | ||
101 | /*! | |
102 | \brief \brief_calc{envelope} | |
103 | \ingroup envelope | |
104 | \details \details_calc{return_envelope,\det_envelope}. \details_return{envelope} | |
105 | \tparam Box \tparam_box | |
106 | \tparam Geometry \tparam_geometry | |
107 | \param geometry \param_geometry | |
108 | \return \return_calc{envelope} | |
109 | ||
110 | \qbk{[include reference/algorithms/envelope.qbk]} | |
111 | \qbk{ | |
112 | [heading Example] | |
113 | [return_envelope] [return_envelope_output] | |
114 | } | |
115 | */ | |
116 | template<typename Box, typename Geometry> | |
117 | inline Box return_envelope(Geometry const& geometry) | |
118 | { | |
119 | Box mbr; | |
120 | resolve_variant::envelope<Geometry>::apply(geometry, mbr); | |
121 | return mbr; | |
122 | } | |
123 | ||
124 | }} // namespace boost::geometry | |
125 | ||
126 | #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INTERFACE_HPP |