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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) |
2 | ||
3 | // Copyright (c) 2010-2012 Barend Gehrels, Amsterdam, the Netherlands. | |
4 | ||
5 | // Use, modification and distribution is subject to the Boost Software License, | |
6 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | ||
9 | #ifndef BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_HOLES_PROXY_HPP | |
10 | #define BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_HOLES_PROXY_HPP | |
11 | ||
12 | // Adapts Geometries from Boost.Polygon for usage in Boost.Geometry | |
13 | // boost::polygon::polygon_with_holes_data -> boost::geometry::polygon | |
14 | // pair{begin_holes, begin_holes} -> interior_proxy | |
15 | ||
16 | #include <boost/polygon/polygon.hpp> | |
17 | ||
18 | #include <boost/geometry/geometries/adapted/boost_polygon/hole_iterator.hpp> | |
19 | #include <boost/geometry/geometries/adapted/boost_polygon/ring_proxy.hpp> | |
20 | ||
21 | ||
22 | namespace boost { namespace geometry | |
23 | { | |
24 | ||
25 | namespace adapt { namespace bp | |
26 | { | |
27 | ||
28 | ||
29 | // Polygon should implement the boost::polygon::polygon_with_holes_concept | |
30 | // Specify constness in the template parameter if necessary | |
31 | template<typename Polygon> | |
32 | struct holes_proxy | |
33 | { | |
34 | typedef ring_proxy | |
35 | < | |
36 | typename boost::mpl::if_ | |
37 | < | |
38 | typename boost::is_const<Polygon>, | |
39 | Polygon const, | |
40 | Polygon | |
41 | >::type | |
42 | > proxy_type; | |
43 | typedef hole_iterator<Polygon, proxy_type> iterator_type; | |
44 | ||
45 | // The next line does not work probably because coordinate_type is part of the | |
46 | // polygon_traits, but not of the polygon_with_holes_traits | |
47 | // typedef typename boost::polygon::polygon_traits<Polygon>::coordinate_type coordinate_type; | |
48 | ||
49 | // So we use: | |
50 | typedef typename Polygon::coordinate_type coordinate_type; | |
51 | ||
52 | inline holes_proxy(Polygon& p) | |
53 | : polygon(p) | |
54 | {} | |
55 | ||
56 | inline void clear() | |
57 | { | |
58 | Polygon empty; | |
59 | // Clear the holes | |
60 | polygon.set_holes | |
61 | ( | |
62 | boost::polygon::begin_holes(empty), | |
63 | boost::polygon::end_holes(empty) | |
64 | ); | |
65 | } | |
66 | ||
67 | inline void resize(std::size_t new_size) | |
68 | { | |
69 | std::vector<boost::polygon::polygon_data<coordinate_type> > temporary_copy | |
70 | ( | |
71 | boost::polygon::begin_holes(polygon), | |
72 | boost::polygon::end_holes(polygon) | |
73 | ); | |
74 | temporary_copy.resize(new_size); | |
75 | polygon.set_holes(temporary_copy.begin(), temporary_copy.end()); | |
76 | } | |
77 | ||
78 | template <typename Ring> | |
79 | inline void push_back(Ring const& ring) | |
80 | { | |
81 | std::vector<boost::polygon::polygon_data<coordinate_type> > temporary_copy | |
82 | ( | |
83 | boost::polygon::begin_holes(polygon), | |
84 | boost::polygon::end_holes(polygon) | |
85 | ); | |
86 | boost::polygon::polygon_data<coordinate_type> added; | |
87 | boost::polygon::set_points(added, ring.begin(), ring.end()); | |
88 | temporary_copy.push_back(added); | |
89 | polygon.set_holes(temporary_copy.begin(), temporary_copy.end()); | |
90 | } | |
91 | ||
92 | ||
93 | Polygon& polygon; | |
94 | }; | |
95 | ||
96 | ||
97 | // Support holes_proxy for Boost.Range ADP | |
98 | ||
99 | // Const versions | |
100 | template<typename Polygon> | |
101 | inline typename boost::geometry::adapt::bp::holes_proxy<Polygon const>::iterator_type | |
102 | range_begin(boost::geometry::adapt::bp::holes_proxy<Polygon const> const& proxy) | |
103 | { | |
104 | typename boost::geometry::adapt::bp::holes_proxy<Polygon const>::iterator_type | |
105 | begin(proxy.polygon, boost::polygon::begin_holes(proxy.polygon)); | |
106 | return begin; | |
107 | } | |
108 | ||
109 | template<typename Polygon> | |
110 | inline typename boost::geometry::adapt::bp::holes_proxy<Polygon const>::iterator_type | |
111 | range_end(boost::geometry::adapt::bp::holes_proxy<Polygon const> const& proxy) | |
112 | { | |
113 | typename boost::geometry::adapt::bp::holes_proxy<Polygon const>::iterator_type | |
114 | end(proxy.polygon, boost::polygon::end_holes(proxy.polygon)); | |
115 | return end; | |
116 | } | |
117 | ||
118 | // Mutable versions | |
119 | template<typename Polygon> | |
120 | inline typename boost::geometry::adapt::bp::holes_proxy<Polygon>::iterator_type | |
121 | range_begin(boost::geometry::adapt::bp::holes_proxy<Polygon>& proxy) | |
122 | { | |
123 | typename boost::geometry::adapt::bp::holes_proxy<Polygon>::iterator_type | |
124 | begin(proxy.polygon, boost::polygon::begin_holes(proxy.polygon)); | |
125 | return begin; | |
126 | } | |
127 | ||
128 | template<typename Polygon> | |
129 | inline typename boost::geometry::adapt::bp::holes_proxy<Polygon>::iterator_type | |
130 | range_end(boost::geometry::adapt::bp::holes_proxy<Polygon>& proxy) | |
131 | { | |
132 | typename boost::geometry::adapt::bp::holes_proxy<Polygon>::iterator_type | |
133 | end(proxy.polygon, boost::polygon::end_holes(proxy.polygon)); | |
134 | return end; | |
135 | } | |
136 | ||
137 | ||
138 | }} | |
139 | ||
140 | namespace traits | |
141 | { | |
142 | ||
143 | template <typename Polygon> | |
144 | struct rvalue_type<adapt::bp::holes_proxy<Polygon> > | |
145 | { | |
146 | typedef adapt::bp::holes_proxy<Polygon> type; | |
147 | }; | |
148 | ||
149 | ||
150 | template <typename Polygon> | |
151 | struct clear<adapt::bp::holes_proxy<Polygon> > | |
152 | { | |
153 | static inline void apply(adapt::bp::holes_proxy<Polygon> proxy) | |
154 | { | |
155 | proxy.clear(); | |
156 | } | |
157 | }; | |
158 | ||
159 | template <typename Polygon> | |
160 | struct resize<adapt::bp::holes_proxy<Polygon> > | |
161 | { | |
162 | static inline void apply(adapt::bp::holes_proxy<Polygon> proxy, std::size_t new_size) | |
163 | { | |
164 | proxy.resize(new_size); | |
165 | } | |
166 | }; | |
167 | ||
168 | template <typename Polygon> | |
169 | struct push_back<adapt::bp::holes_proxy<Polygon> > | |
170 | { | |
171 | template <typename Ring> | |
172 | static inline void apply(adapt::bp::holes_proxy<Polygon> proxy, Ring const& ring) | |
173 | { | |
174 | proxy.push_back(ring); | |
175 | } | |
176 | }; | |
177 | ||
178 | ||
179 | ||
180 | } // namespace traits | |
181 | ||
182 | ||
183 | }} | |
184 | ||
185 | ||
186 | // Specialize holes_proxy for Boost.Range | |
187 | namespace boost | |
188 | { | |
189 | template<typename Polygon> | |
190 | struct range_mutable_iterator<geometry::adapt::bp::holes_proxy<Polygon> > | |
191 | { | |
192 | typedef typename geometry::adapt::bp::holes_proxy<Polygon>::iterator_type type; | |
193 | }; | |
194 | ||
195 | template<typename Polygon> | |
196 | struct range_const_iterator<geometry::adapt::bp::holes_proxy<Polygon> > | |
197 | { | |
198 | typedef typename geometry::adapt::bp::holes_proxy<Polygon const>::iterator_type type; | |
199 | }; | |
200 | ||
201 | } // namespace boost | |
202 | ||
203 | ||
204 | #endif // BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_HOLES_PROXY_HPP |