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1 | // Boost.Geometry (aka GGL, Generic Geometry Library) | |
2 | ||
3 | // Copyright (c) 2013 Barend Gehrels, Amsterdam, the Netherlands. | |
4 | // Copyright (c) 2013 Bruno Lalande, Paris, France. | |
5 | // Copyright (c) 2013 Mateusz Loskot, London, UK. | |
6 | // Copyright (c) 2013 Adam Wulkiewicz, Lodz, Poland. | |
7 | ||
8 | // Use, modification and distribution is subject to the Boost Software License, | |
9 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
10 | // http://www.boost.org/LICENSE_1_0.txt) | |
11 | ||
12 | #ifndef BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP | |
13 | #define BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP | |
14 | ||
15 | #include <boost/geometry/core/coordinate_type.hpp> | |
16 | #include <boost/geometry/policies/robustness/rescale_policy_tags.hpp> | |
17 | ||
18 | #include <boost/config.hpp> | |
19 | #include <boost/mpl/if.hpp> | |
20 | ||
21 | namespace boost { namespace geometry { namespace detail | |
22 | { | |
23 | ||
24 | // Temporary meta-function to access segment-ratio for a policy | |
25 | template <typename Point, typename Policy> | |
26 | struct segment_ratio_type | |
27 | { | |
28 | // Type in segment ratio is either the coordinate type, or for | |
29 | // deprecated robust point types it is a long_long type | |
30 | typedef typename boost::mpl::if_c | |
31 | < | |
32 | boost::is_same | |
33 | < | |
34 | typename rescale_policy_type<Policy>::type, | |
35 | no_rescale_policy_tag | |
36 | >::value, | |
37 | typename geometry::coordinate_type<Point>::type, | |
38 | boost::long_long_type | |
39 | >::type coordinate_type; | |
40 | ||
41 | // Define segment ratio based on the coordinate type | |
42 | typedef geometry::segment_ratio<coordinate_type> type; | |
43 | }; | |
44 | ||
45 | ||
46 | }}} // namespace boost::geometry::deatil | |
47 | ||
48 | ||
49 | #endif // BOOST_GEOMETRY_POLICIES_ROBUSTNESS_SEGMENT_RATIO_TYPE_HPP |