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, 2016, 2017, 2018.
8 // Modifications copyright (c) 2015-2018, Oracle and/or its affiliates.
9 
10 // Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
11 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
12 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
13 
14 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
15 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
16 
17 // Distributed under the Boost Software License, Version 1.0.
18 // (See accompanying file LICENSE_1_0.txt or copy at
19 // http://www.boost.org/LICENSE_1_0.txt)
20 
21 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INTERFACE_HPP
22 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INTERFACE_HPP
23 
24 
25 #include <boost/variant/apply_visitor.hpp>
26 #include <boost/variant/static_visitor.hpp>
27 #include <boost/variant/variant_fwd.hpp>
28 
29 #include <boost/geometry/algorithms/dispatch/envelope.hpp>
30 
31 #include <boost/geometry/core/coordinate_system.hpp>
32 #include <boost/geometry/core/tag.hpp>
33 #include <boost/geometry/core/tags.hpp>
34 
35 #include <boost/geometry/geometries/concepts/check.hpp>
36 
37 #include <boost/geometry/strategies/default_strategy.hpp>
38 #include <boost/geometry/strategies/envelope.hpp>
39 
40 #include <boost/geometry/util/select_most_precise.hpp>
41 
42 
43 namespace boost { namespace geometry
44 {
45 
46 namespace resolve_strategy
47 {
48 
49 template <typename Geometry>
50 struct envelope
51 {
52     template <typename Box, typename Strategy>
applyboost::geometry::resolve_strategy::envelope53     static inline void apply(Geometry const& geometry,
54                              Box& box,
55                              Strategy const& strategy)
56     {
57         dispatch::envelope<Geometry>::apply(geometry, box, strategy);
58     }
59 
60     template <typename Box>
applyboost::geometry::resolve_strategy::envelope61     static inline void apply(Geometry const& geometry,
62                              Box& box,
63                              default_strategy)
64     {
65         typedef typename strategy::envelope::services::default_strategy
66             <
67                 typename tag<Geometry>::type,
68                 typename cs_tag<Geometry>::type,
69                 typename select_most_precise
70                     <
71                         typename coordinate_type<Geometry>::type,
72                         typename coordinate_type<Box>::type
73                     >::type
74             >::type strategy_type;
75 
76         dispatch::envelope<Geometry>::apply(geometry, box, strategy_type());
77     }
78 };
79 
80 } // namespace resolve_strategy
81 
82 namespace resolve_variant
83 {
84 
85 template <typename Geometry>
86 struct envelope
87 {
88     template <typename Box, typename Strategy>
applyboost::geometry::resolve_variant::envelope89     static inline void apply(Geometry const& geometry,
90                              Box& box,
91                              Strategy const& strategy)
92     {
93         concepts::check<Geometry const>();
94         concepts::check<Box>();
95 
96         resolve_strategy::envelope<Geometry>::apply(geometry, box, strategy);
97     }
98 };
99 
100 
101 template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
102 struct envelope<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
103 {
104     template <typename Box, typename Strategy>
105     struct visitor: boost::static_visitor<void>
106     {
107         Box& m_box;
108         Strategy const& m_strategy;
109 
visitorboost::geometry::resolve_variant::envelope::visitor110         visitor(Box& box, Strategy const& strategy)
111             : m_box(box)
112             , m_strategy(strategy)
113         {}
114 
115         template <typename Geometry>
operator ()boost::geometry::resolve_variant::envelope::visitor116         void operator()(Geometry const& geometry) const
117         {
118             envelope<Geometry>::apply(geometry, m_box, m_strategy);
119         }
120     };
121 
122     template <typename Box, typename Strategy>
123     static inline void
applyboost::geometry::resolve_variant::envelope124     apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry,
125           Box& box,
126           Strategy const& strategy)
127     {
128         boost::apply_visitor(visitor<Box, Strategy>(box, strategy), geometry);
129     }
130 };
131 
132 } // namespace resolve_variant
133 
134 /*!
135 \brief \brief_calc{envelope (with strategy)}
136 \ingroup envelope
137 \details \details_calc{envelope,\det_envelope}.
138 \tparam Geometry \tparam_geometry
139 \tparam Box \tparam_box
140 \tparam Strategy \tparam_strategy{Envelope}
141 \param geometry \param_geometry
142 \param mbr \param_box \param_set{envelope}
143 \param strategy \param_strategy{envelope}
144 
145 \qbk{distinguish,with strategy}
146 \qbk{[include reference/algorithms/envelope.qbk]}
147 \qbk{
148 [heading Example]
149 [envelope] [envelope_output]
150 }
151 */
152 template<typename Geometry, typename Box, typename Strategy>
envelope(Geometry const & geometry,Box & mbr,Strategy const & strategy)153 inline void envelope(Geometry const& geometry, Box& mbr, Strategy const& strategy)
154 {
155     resolve_variant::envelope<Geometry>::apply(geometry, mbr, strategy);
156 }
157 
158 /*!
159 \brief \brief_calc{envelope}
160 \ingroup envelope
161 \details \details_calc{envelope,\det_envelope}.
162 \tparam Geometry \tparam_geometry
163 \tparam Box \tparam_box
164 \param geometry \param_geometry
165 \param mbr \param_box \param_set{envelope}
166 
167 \qbk{[include reference/algorithms/envelope.qbk]}
168 \qbk{
169 [heading Example]
170 [envelope] [envelope_output]
171 }
172 */
173 template<typename Geometry, typename Box>
envelope(Geometry const & geometry,Box & mbr)174 inline void envelope(Geometry const& geometry, Box& mbr)
175 {
176     resolve_variant::envelope<Geometry>::apply(geometry, mbr, default_strategy());
177 }
178 
179 
180 /*!
181 \brief \brief_calc{envelope}
182 \ingroup envelope
183 \details \details_calc{return_envelope,\det_envelope}. \details_return{envelope}
184 \tparam Box \tparam_box
185 \tparam Geometry \tparam_geometry
186 \tparam Strategy \tparam_strategy{Envelope}
187 \param geometry \param_geometry
188 \param strategy \param_strategy{envelope}
189 \return \return_calc{envelope}
190 
191 \qbk{distinguish,with strategy}
192 \qbk{[include reference/algorithms/envelope.qbk]}
193 \qbk{
194 [heading Example]
195 [return_envelope] [return_envelope_output]
196 }
197 */
198 template<typename Box, typename Geometry, typename Strategy>
return_envelope(Geometry const & geometry,Strategy const & strategy)199 inline Box return_envelope(Geometry const& geometry, Strategy const& strategy)
200 {
201     Box mbr;
202     resolve_variant::envelope<Geometry>::apply(geometry, mbr, strategy);
203     return mbr;
204 }
205 
206 /*!
207 \brief \brief_calc{envelope}
208 \ingroup envelope
209 \details \details_calc{return_envelope,\det_envelope}. \details_return{envelope}
210 \tparam Box \tparam_box
211 \tparam Geometry \tparam_geometry
212 \param geometry \param_geometry
213 \return \return_calc{envelope}
214 
215 \qbk{[include reference/algorithms/envelope.qbk]}
216 \qbk{
217 [heading Example]
218 [return_envelope] [return_envelope_output]
219 }
220 */
221 template<typename Box, typename Geometry>
return_envelope(Geometry const & geometry)222 inline Box return_envelope(Geometry const& geometry)
223 {
224     Box mbr;
225     resolve_variant::envelope<Geometry>::apply(geometry, mbr, default_strategy());
226     return mbr;
227 }
228 
229 }} // namespace boost::geometry
230 
231 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_INTERFACE_HPP
232