ceph/src/boost/boost/geometry/policies/robustness/no_rescale_policy.hpp

   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_NO_RESCALE_POLICY_HPP
  13 #define BOOST_GEOMETRY_POLICIES_ROBUSTNESS_NO_RESCALE_POLICY_HPP
  14
  15 #include <stddef.h>
  16
  17 #include <boost/geometry/core/coordinate_type.hpp>
  18 #include <boost/geometry/policies/robustness/robust_point_type.hpp>
  19 #include <boost/geometry/policies/robustness/segment_ratio.hpp>
  20 #include <boost/geometry/policies/robustness/segment_ratio_type.hpp>
  21
  22 namespace boost { namespace geometry
  23 {
  24
  25 #ifndef DOXYGEN_NO_DETAIL
  26 namespace detail
  27 {
  28
  29 // Probably this will be moved out of namespace detail
  30 struct no_rescale_policy
  31 {
  32     static bool const enabled = false;
  33
  34     // We don't rescale but return the reference of the input
  35     template <std::size_t Dimension, typename Value>
  36     inline Value const& apply(Value const& value) const
  37     {
  38         return value;
  39     }
  40 };
  41
  42 } // namespace detail
  43 #endif
  44
  45
  46 // Implement meta-functions for this policy
  47 template <typename Point>
  48 struct robust_point_type<Point, detail::no_rescale_policy>
  49 {
  50     // The point itself
  51     typedef Point type;
  52 };
  53
  54 template <typename Point>
  55 struct segment_ratio_type<Point, detail::no_rescale_policy>
  56 {
  57     // Define a segment_ratio defined on coordinate type, e.g.
  58     // int/int or float/float
  59     typedef typename geometry::coordinate_type<Point>::type coordinate_type;
  60     typedef segment_ratio<coordinate_type> type;
  61 };
  62
  63
  64 }} // namespace boost::geometry
  65
  66 #endif // BOOST_GEOMETRY_POLICIES_ROBUSTNESS_NO_RESCALE_POLICY_HPP