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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | ||
3 | // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
4 | // Copyright (c) 2008-2012 Bruno Lalande, Paris, France. | |
5 | // Copyright (c) 2009-2012 Mateusz Loskot, London, UK. | |
6 | ||
7 | // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library | |
8 | // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands. | |
9 | ||
10 | // Use, modification and distribution is subject to the Boost Software License, | |
11 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
12 | // http://www.boost.org/LICENSE_1_0.txt) | |
13 | ||
14 | #ifndef BOOST_GEOMETRY_ALGORITHMS_ASSIGN_VALUES_HPP | |
15 | #define BOOST_GEOMETRY_ALGORITHMS_ASSIGN_VALUES_HPP | |
16 | ||
17 | ||
18 | #include <cstddef> | |
19 | ||
20 | #include <boost/concept/requires.hpp> | |
21 | #include <boost/concept_check.hpp> | |
22 | #include <boost/mpl/assert.hpp> | |
23 | #include <boost/mpl/if.hpp> | |
24 | #include <boost/numeric/conversion/bounds.hpp> | |
25 | #include <boost/numeric/conversion/cast.hpp> | |
26 | ||
27 | #include <boost/geometry/arithmetic/arithmetic.hpp> | |
28 | #include <boost/geometry/algorithms/append.hpp> | |
29 | #include <boost/geometry/algorithms/clear.hpp> | |
30 | #include <boost/geometry/core/access.hpp> | |
31 | #include <boost/geometry/core/exterior_ring.hpp> | |
32 | #include <boost/geometry/core/tags.hpp> | |
33 | ||
34 | #include <boost/geometry/geometries/concepts/check.hpp> | |
35 | ||
36 | ||
37 | #include <boost/geometry/util/for_each_coordinate.hpp> | |
38 | ||
39 | ||
40 | namespace boost { namespace geometry | |
41 | { | |
42 | ||
43 | #ifndef DOXYGEN_NO_DETAIL | |
44 | namespace detail { namespace assign | |
45 | { | |
46 | ||
47 | ||
48 | template <std::size_t Index, std::size_t Dimension, std::size_t DimensionCount> | |
49 | struct initialize | |
50 | { | |
51 | template <typename Box> | |
52 | static inline void apply(Box& box, typename coordinate_type<Box>::type const& value) | |
53 | { | |
54 | geometry::set<Index, Dimension>(box, value); | |
55 | initialize<Index, Dimension + 1, DimensionCount>::apply(box, value); | |
56 | } | |
57 | }; | |
58 | ||
59 | ||
60 | template <std::size_t Index, std::size_t DimensionCount> | |
61 | struct initialize<Index, DimensionCount, DimensionCount> | |
62 | { | |
63 | template <typename Box> | |
64 | static inline void apply(Box&, typename coordinate_type<Box>::type const&) | |
65 | {} | |
66 | }; | |
67 | ||
68 | ||
69 | struct assign_zero_point | |
70 | { | |
71 | template <typename Point> | |
72 | static inline void apply(Point& point) | |
73 | { | |
74 | geometry::assign_value(point, 0); | |
75 | } | |
76 | }; | |
77 | ||
78 | ||
79 | struct assign_inverse_box_or_segment | |
80 | { | |
81 | ||
82 | template <typename BoxOrSegment> | |
83 | static inline void apply(BoxOrSegment& geometry) | |
84 | { | |
85 | typedef typename point_type<BoxOrSegment>::type point_type; | |
86 | typedef typename coordinate_type<point_type>::type bound_type; | |
87 | ||
88 | initialize<0, 0, dimension<BoxOrSegment>::type::value>::apply( | |
89 | geometry, boost::numeric::bounds<bound_type>::highest() | |
90 | ); | |
91 | initialize<1, 0, dimension<BoxOrSegment>::type::value>::apply( | |
92 | geometry, boost::numeric::bounds<bound_type>::lowest() | |
93 | ); | |
94 | } | |
95 | }; | |
96 | ||
97 | ||
98 | struct assign_zero_box_or_segment | |
99 | { | |
100 | template <typename BoxOrSegment> | |
101 | static inline void apply(BoxOrSegment& geometry) | |
102 | { | |
103 | typedef typename coordinate_type<BoxOrSegment>::type coordinate_type; | |
104 | ||
105 | initialize<0, 0, dimension<BoxOrSegment>::type::value>::apply( | |
106 | geometry, coordinate_type() | |
107 | ); | |
108 | initialize<1, 0, dimension<BoxOrSegment>::type::value>::apply( | |
109 | geometry, coordinate_type() | |
110 | ); | |
111 | } | |
112 | }; | |
113 | ||
114 | ||
115 | template | |
116 | < | |
117 | std::size_t Corner1, std::size_t Corner2, | |
118 | typename Box, typename Point | |
119 | > | |
120 | inline void assign_box_2d_corner(Box const& box, Point& point) | |
121 | { | |
122 | // Be sure both are 2-Dimensional | |
123 | assert_dimension<Box, 2>(); | |
124 | assert_dimension<Point, 2>(); | |
125 | ||
126 | // Copy coordinates | |
127 | typedef typename coordinate_type<Point>::type coordinate_type; | |
128 | ||
129 | geometry::set<0>(point, boost::numeric_cast<coordinate_type>(get<Corner1, 0>(box))); | |
130 | geometry::set<1>(point, boost::numeric_cast<coordinate_type>(get<Corner2, 1>(box))); | |
131 | } | |
132 | ||
133 | ||
134 | ||
135 | template | |
136 | < | |
137 | typename Geometry, typename Point, | |
138 | std::size_t Index, | |
139 | std::size_t Dimension, std::size_t DimensionCount | |
140 | > | |
141 | struct assign_point_to_index | |
142 | { | |
143 | ||
144 | static inline void apply(Point const& point, Geometry& geometry) | |
145 | { | |
146 | geometry::set<Index, Dimension>(geometry, boost::numeric_cast | |
147 | < | |
148 | typename coordinate_type<Geometry>::type | |
149 | >(geometry::get<Dimension>(point))); | |
150 | ||
151 | assign_point_to_index | |
152 | < | |
153 | Geometry, Point, Index, Dimension + 1, DimensionCount | |
154 | >::apply(point, geometry); | |
155 | } | |
156 | }; | |
157 | ||
158 | template | |
159 | < | |
160 | typename Geometry, typename Point, | |
161 | std::size_t Index, | |
162 | std::size_t DimensionCount | |
163 | > | |
164 | struct assign_point_to_index | |
165 | < | |
166 | Geometry, Point, | |
167 | Index, | |
168 | DimensionCount, DimensionCount | |
169 | > | |
170 | { | |
171 | static inline void apply(Point const& , Geometry& ) | |
172 | { | |
173 | } | |
174 | }; | |
175 | ||
176 | ||
177 | template | |
178 | < | |
179 | typename Geometry, typename Point, | |
180 | std::size_t Index, | |
181 | std::size_t Dimension, std::size_t DimensionCount | |
182 | > | |
183 | struct assign_point_from_index | |
184 | { | |
185 | ||
186 | static inline void apply(Geometry const& geometry, Point& point) | |
187 | { | |
188 | geometry::set<Dimension>( point, boost::numeric_cast | |
189 | < | |
190 | typename coordinate_type<Point>::type | |
191 | >(geometry::get<Index, Dimension>(geometry))); | |
192 | ||
193 | assign_point_from_index | |
194 | < | |
195 | Geometry, Point, Index, Dimension + 1, DimensionCount | |
196 | >::apply(geometry, point); | |
197 | } | |
198 | }; | |
199 | ||
200 | template | |
201 | < | |
202 | typename Geometry, typename Point, | |
203 | std::size_t Index, | |
204 | std::size_t DimensionCount | |
205 | > | |
206 | struct assign_point_from_index | |
207 | < | |
208 | Geometry, Point, | |
209 | Index, | |
210 | DimensionCount, DimensionCount | |
211 | > | |
212 | { | |
213 | static inline void apply(Geometry const&, Point&) | |
214 | { | |
215 | } | |
216 | }; | |
217 | ||
218 | ||
219 | template <typename Geometry> | |
220 | struct assign_2d_box_or_segment | |
221 | { | |
222 | typedef typename coordinate_type<Geometry>::type coordinate_type; | |
223 | ||
224 | // Here we assign 4 coordinates to a box of segment | |
225 | // -> Most logical is: x1,y1,x2,y2 | |
226 | // In case the user reverses x1/x2 or y1/y2, for a box, we could reverse them (THAT IS NOT IMPLEMENTED) | |
227 | ||
228 | template <typename Type> | |
229 | static inline void apply(Geometry& geometry, | |
230 | Type const& x1, Type const& y1, Type const& x2, Type const& y2) | |
231 | { | |
232 | geometry::set<0, 0>(geometry, boost::numeric_cast<coordinate_type>(x1)); | |
233 | geometry::set<0, 1>(geometry, boost::numeric_cast<coordinate_type>(y1)); | |
234 | geometry::set<1, 0>(geometry, boost::numeric_cast<coordinate_type>(x2)); | |
235 | geometry::set<1, 1>(geometry, boost::numeric_cast<coordinate_type>(y2)); | |
236 | } | |
237 | }; | |
238 | ||
239 | ||
240 | }} // namespace detail::assign | |
241 | #endif // DOXYGEN_NO_DETAIL | |
242 | ||
243 | #ifndef DOXYGEN_NO_DISPATCH | |
244 | namespace dispatch | |
245 | { | |
246 | ||
247 | template <typename GeometryTag, typename Geometry, std::size_t DimensionCount> | |
248 | struct assign | |
249 | { | |
250 | BOOST_MPL_ASSERT_MSG | |
251 | ( | |
252 | false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE | |
253 | , (types<Geometry>) | |
254 | ); | |
255 | }; | |
256 | ||
257 | template <typename Point> | |
258 | struct assign<point_tag, Point, 2> | |
259 | { | |
260 | typedef typename coordinate_type<Point>::type coordinate_type; | |
261 | ||
262 | template <typename T> | |
263 | static inline void apply(Point& point, T const& c1, T const& c2) | |
264 | { | |
265 | set<0>(point, boost::numeric_cast<coordinate_type>(c1)); | |
266 | set<1>(point, boost::numeric_cast<coordinate_type>(c2)); | |
267 | } | |
268 | }; | |
269 | ||
270 | template <typename Point> | |
271 | struct assign<point_tag, Point, 3> | |
272 | { | |
273 | typedef typename coordinate_type<Point>::type coordinate_type; | |
274 | ||
275 | template <typename T> | |
276 | static inline void apply(Point& point, T const& c1, T const& c2, T const& c3) | |
277 | { | |
278 | set<0>(point, boost::numeric_cast<coordinate_type>(c1)); | |
279 | set<1>(point, boost::numeric_cast<coordinate_type>(c2)); | |
280 | set<2>(point, boost::numeric_cast<coordinate_type>(c3)); | |
281 | } | |
282 | }; | |
283 | ||
284 | template <typename Box> | |
285 | struct assign<box_tag, Box, 2> | |
286 | : detail::assign::assign_2d_box_or_segment<Box> | |
287 | {}; | |
288 | ||
289 | template <typename Segment> | |
290 | struct assign<segment_tag, Segment, 2> | |
291 | : detail::assign::assign_2d_box_or_segment<Segment> | |
292 | {}; | |
293 | ||
294 | ||
295 | ||
296 | template <typename GeometryTag, typename Geometry> | |
297 | struct assign_zero {}; | |
298 | ||
299 | ||
300 | template <typename Point> | |
301 | struct assign_zero<point_tag, Point> | |
302 | : detail::assign::assign_zero_point | |
303 | {}; | |
304 | ||
305 | template <typename Box> | |
306 | struct assign_zero<box_tag, Box> | |
307 | : detail::assign::assign_zero_box_or_segment | |
308 | {}; | |
309 | ||
310 | template <typename Segment> | |
311 | struct assign_zero<segment_tag, Segment> | |
312 | : detail::assign::assign_zero_box_or_segment | |
313 | {}; | |
314 | ||
315 | ||
316 | template <typename GeometryTag, typename Geometry> | |
317 | struct assign_inverse {}; | |
318 | ||
319 | template <typename Box> | |
320 | struct assign_inverse<box_tag, Box> | |
321 | : detail::assign::assign_inverse_box_or_segment | |
322 | {}; | |
323 | ||
324 | template <typename Segment> | |
325 | struct assign_inverse<segment_tag, Segment> | |
326 | : detail::assign::assign_inverse_box_or_segment | |
327 | {}; | |
328 | ||
329 | ||
330 | } // namespace dispatch | |
331 | #endif // DOXYGEN_NO_DISPATCH | |
332 | ||
333 | }} // namespace boost::geometry | |
334 | ||
335 | ||
336 | #endif // BOOST_GEOMETRY_ALGORITHMS_ASSIGN_VALUES_HPP |