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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_RING_HPP | |
10 | #define BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP | |
11 | ||
12 | // Adapts Geometries from Boost.Polygon for usage in Boost.Geometry | |
13 | // boost::polygon::polygon_data -> boost::geometry::ring | |
14 | ||
15 | #include <cstddef> | |
16 | #include <boost/polygon/polygon.hpp> | |
17 | ||
18 | #include <boost/geometry/core/access.hpp> | |
19 | #include <boost/geometry/core/cs.hpp> | |
20 | #include <boost/geometry/core/coordinate_dimension.hpp> | |
21 | #include <boost/geometry/core/coordinate_type.hpp> | |
22 | #include <boost/geometry/core/mutable_range.hpp> | |
23 | #include <boost/geometry/core/tags.hpp> | |
24 | ||
25 | ||
26 | #ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS | |
27 | ||
28 | namespace boost { namespace geometry | |
29 | { | |
30 | ||
31 | namespace traits | |
32 | { | |
33 | ||
34 | template <typename CoordinateType> | |
35 | struct tag<boost::polygon::polygon_data<CoordinateType> > | |
36 | { | |
37 | typedef ring_tag type; | |
38 | }; | |
39 | ||
40 | template <typename CoordinateType> | |
41 | struct clear<boost::polygon::polygon_data<CoordinateType> > | |
42 | { | |
43 | static inline void apply(boost::polygon::polygon_data<CoordinateType>& data) | |
44 | { | |
45 | // There is no "clear" function but we can assign | |
46 | // a newly (and therefore empty) constructed polygon | |
47 | boost::polygon::assign(data, boost::polygon::polygon_data<CoordinateType>()); | |
48 | } | |
49 | }; | |
50 | ||
51 | template <typename CoordinateType> | |
52 | struct push_back<boost::polygon::polygon_data<CoordinateType> > | |
53 | { | |
54 | typedef boost::polygon::point_data<CoordinateType> point_type; | |
55 | ||
56 | static inline void apply(boost::polygon::polygon_data<CoordinateType>& data, | |
57 | point_type const& point) | |
58 | { | |
59 | // Boost.Polygon's polygons are not appendable. So create a temporary vector, | |
60 | // add a record and set it to the original. Of course: this is not efficient. | |
61 | // But there seems no other way (without using a wrapper) | |
62 | std::vector<point_type> temporary_vector | |
63 | ( | |
64 | boost::polygon::begin_points(data), | |
65 | boost::polygon::end_points(data) | |
66 | ); | |
67 | temporary_vector.push_back(point); | |
68 | data.set(temporary_vector.begin(), temporary_vector.end()); | |
69 | } | |
70 | }; | |
71 | ||
72 | template <typename CoordinateType> | |
73 | struct resize<boost::polygon::polygon_data<CoordinateType> > | |
74 | { | |
75 | typedef boost::polygon::point_data<CoordinateType> point_type; | |
76 | ||
77 | static inline void apply(boost::polygon::polygon_data<CoordinateType>& data, | |
78 | std::size_t new_size) | |
79 | { | |
80 | // Boost.Polygon's polygons are not resizable. So create a temporary vector, | |
81 | // resize it and set it to the original. Of course: this is not efficient. | |
82 | // But there seems no other way (without using a wrapper) | |
83 | std::vector<point_type> temporary_vector | |
84 | ( | |
85 | boost::polygon::begin_points(data), | |
86 | boost::polygon::end_points(data) | |
87 | ); | |
88 | temporary_vector.resize(new_size); | |
89 | data.set(temporary_vector.begin(), temporary_vector.end()); | |
90 | } | |
91 | }; | |
92 | ||
93 | ||
94 | } // namespace traits | |
95 | ||
96 | }} // namespace boost::geometry | |
97 | ||
98 | ||
99 | // Adapt Boost.Polygon's polygon_data to Boost.Range | |
100 | // This just translates to | |
101 | // polygon_data.begin() and polygon_data.end() | |
102 | namespace boost | |
103 | { | |
104 | template<typename CoordinateType> | |
105 | struct range_mutable_iterator<boost::polygon::polygon_data<CoordinateType> > | |
106 | { | |
107 | typedef typename boost::polygon::polygon_traits | |
108 | < | |
109 | boost::polygon::polygon_data<CoordinateType> | |
110 | >::iterator_type type; | |
111 | }; | |
112 | ||
113 | template<typename CoordinateType> | |
114 | struct range_const_iterator<boost::polygon::polygon_data<CoordinateType> > | |
115 | { | |
116 | typedef typename boost::polygon::polygon_traits | |
117 | < | |
118 | boost::polygon::polygon_data<CoordinateType> | |
119 | >::iterator_type type; | |
120 | }; | |
121 | ||
122 | template<typename CoordinateType> | |
123 | struct range_size<boost::polygon::polygon_data<CoordinateType> > | |
124 | { | |
125 | typedef std::size_t type; | |
126 | }; | |
127 | ||
128 | } // namespace boost | |
129 | ||
130 | ||
131 | // Support Boost.Polygon's polygon_data for Boost.Range ADP | |
132 | namespace boost { namespace polygon | |
133 | { | |
134 | ||
135 | template<typename CoordinateType> | |
136 | inline typename polygon_traits | |
137 | < | |
138 | polygon_data<CoordinateType> | |
139 | >::iterator_type range_begin(polygon_data<CoordinateType>& polygon) | |
140 | { | |
141 | return polygon.begin(); | |
142 | } | |
143 | ||
144 | template<typename CoordinateType> | |
145 | inline typename polygon_traits | |
146 | < | |
147 | polygon_data<CoordinateType> | |
148 | >::iterator_type range_begin(polygon_data<CoordinateType> const& polygon) | |
149 | { | |
150 | return polygon.begin(); | |
151 | } | |
152 | ||
153 | template<typename CoordinateType> | |
154 | inline typename polygon_traits | |
155 | < | |
156 | polygon_data<CoordinateType> | |
157 | >::iterator_type range_end(polygon_data<CoordinateType>& polygon) | |
158 | { | |
159 | return polygon.end(); | |
160 | } | |
161 | ||
162 | template<typename CoordinateType> | |
163 | inline typename polygon_traits | |
164 | < | |
165 | polygon_data<CoordinateType> | |
166 | >::iterator_type range_end(polygon_data<CoordinateType> const& polygon) | |
167 | { | |
168 | return polygon.end(); | |
169 | } | |
170 | ||
171 | template<typename CoordinateType> | |
172 | inline std::size_t range_calculate_size(polygon_data<CoordinateType> const& polygon) | |
173 | { | |
174 | return polygon.size(); | |
175 | } | |
176 | ||
177 | }} | |
178 | ||
179 | #endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS | |
180 | ||
181 | ||
182 | #endif // BOOST_GEOMETRY_GEOMETRIES_ADAPTED_BOOST_POLYGON_RING_HPP |