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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_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP | |
15 | #define BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP | |
16 | ||
17 | #include <vector> | |
18 | #include <iterator> | |
19 | ||
20 | #include <boost/concept_check.hpp> | |
21 | #include <boost/core/ignore_unused.hpp> | |
22 | ||
23 | #include <boost/geometry/geometries/point.hpp> | |
24 | #include <boost/geometry/strategies/concepts/distance_concept.hpp> | |
25 | ||
26 | ||
27 | namespace boost { namespace geometry { namespace concepts | |
28 | { | |
29 | ||
30 | ||
31 | /*! | |
32 | \brief Checks strategy for simplify | |
33 | \ingroup simplify | |
34 | */ | |
35 | template <typename Strategy, typename Point> | |
36 | struct SimplifyStrategy | |
37 | { | |
38 | #ifndef DOXYGEN_NO_CONCEPT_MEMBERS | |
39 | private : | |
40 | ||
41 | // 1) must define distance_strategy_type, | |
42 | // defining point-segment distance strategy (to be checked) | |
43 | typedef typename Strategy::distance_strategy_type ds_type; | |
44 | ||
45 | ||
46 | struct checker | |
47 | { | |
48 | template <typename ApplyMethod> | |
49 | static void apply(ApplyMethod) | |
50 | { | |
51 | namespace ft = boost::function_types; | |
52 | typedef typename ft::parameter_types | |
53 | < | |
54 | ApplyMethod | |
55 | >::type parameter_types; | |
56 | ||
57 | typedef typename boost::mpl::if_ | |
58 | < | |
59 | ft::is_member_function_pointer<ApplyMethod>, | |
60 | boost::mpl::int_<1>, | |
61 | boost::mpl::int_<0> | |
62 | >::type base_index; | |
63 | ||
64 | BOOST_CONCEPT_ASSERT | |
65 | ( | |
66 | (concepts::PointSegmentDistanceStrategy<ds_type, Point, Point>) | |
67 | ); | |
68 | ||
69 | Strategy *str = 0; | |
70 | std::vector<Point> const* v1 = 0; | |
71 | std::vector<Point> * v2 = 0; | |
72 | ||
73 | // 2) must implement method apply with arguments | |
74 | // - Range | |
75 | // - OutputIterator | |
76 | // - floating point value | |
77 | str->apply(*v1, std::back_inserter(*v2), 1.0); | |
78 | ||
79 | boost::ignore_unused<parameter_types, base_index>(); | |
80 | boost::ignore_unused(str); | |
81 | } | |
82 | }; | |
83 | ||
84 | public : | |
85 | BOOST_CONCEPT_USAGE(SimplifyStrategy) | |
86 | { | |
87 | checker::apply(&ds_type::template apply<Point, Point>); | |
88 | } | |
89 | #endif | |
90 | }; | |
91 | ||
92 | ||
93 | ||
94 | }}} // namespace boost::geometry::concepts | |
95 | ||
96 | #endif // BOOST_GEOMETRY_STRATEGIES_CONCEPTS_SIMPLIFY_CONCEPT_HPP |