ceph/src/boost/boost/geometry/strategies/geographic/distance_andoyer.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2016 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // This file was modified by Oracle on 2014, 2017.
   6 // Modifications copyright (c) 2014-2017 Oracle and/or its affiliates.
   7
   8 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
   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_GEOGRAPHIC_DISTANCE_DETAIL_HPP
  15 #define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_DISTANCE_DETAIL_HPP
  16
  17
  18 #include <boost/geometry/strategies/geographic/distance.hpp>
  19 #include <boost/geometry/strategies/geographic/parameters.hpp>
  20
  21
  22 namespace boost { namespace geometry
  23 {
  24
  25 namespace strategy { namespace distance
  26 {
  27
  28
  29 /*!
  30 \brief Point-point distance approximation taking flattening into account
  31 \ingroup distance
  32 \tparam Spheroid The reference spheroid model
  33 \tparam CalculationType \tparam_calculation
  34 \author After Andoyer, 19xx, republished 1950, republished by Meeus, 1999
  35 \note Although not so well-known, the approximation is very good: in all cases the results
  36 are about the same as Vincenty. In my (Barend's) testcases the results didn't differ more than 6 m
  37 \see http://nacc.upc.es/tierra/node16.html
  38 \see http://sci.tech-archive.net/Archive/sci.geo.satellite-nav/2004-12/2724.html
  39 \see http://home.att.net/~srschmitt/great_circle_route.html (implementation)
  40 \see http://www.codeguru.com/Cpp/Cpp/algorithms/article.php/c5115 (implementation)
  41 \see http://futureboy.homeip.net/frinksamp/navigation.frink (implementation)
  42 \see http://www.voidware.com/earthdist.htm (implementation)
  43 \see http://www.dtic.mil/docs/citations/AD0627893
  44 \see http://www.dtic.mil/docs/citations/AD703541
  45 */
  46 template
  47 <
  48     typename Spheroid = srs::spheroid<double>,
  49     typename CalculationType = void
  50 >
  51 class andoyer
  52     : public strategy::distance::geographic
  53         <
  54             strategy::andoyer, Spheroid, CalculationType
  55         >
  56 {
  57     typedef strategy::distance::geographic
  58         <
  59             strategy::andoyer, Spheroid, CalculationType
  60         > base_type;
  61
  62 public :
  63     inline andoyer()
  64         : base_type()
  65     {}
  66
  67     explicit inline andoyer(Spheroid const& spheroid)
  68         : base_type(spheroid)
  69     {}
  70 };
  71
  72
  73 #ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
  74 namespace services
  75 {
  76
  77 template <typename Spheroid, typename CalculationType>
  78 struct tag<andoyer<Spheroid, CalculationType> >
  79 {
  80     typedef strategy_tag_distance_point_point type;
  81 };
  82
  83
  84 template <typename Spheroid, typename CalculationType, typename P1, typename P2>
  85 struct return_type<andoyer<Spheroid, CalculationType>, P1, P2>
  86     : andoyer<Spheroid, CalculationType>::template calculation_type<P1, P2>
  87 {};
  88
  89
  90 template <typename Spheroid, typename CalculationType>
  91 struct comparable_type<andoyer<Spheroid, CalculationType> >
  92 {
  93     typedef andoyer<Spheroid, CalculationType> type;
  94 };
  95
  96
  97 template <typename Spheroid, typename CalculationType>
  98 struct get_comparable<andoyer<Spheroid, CalculationType> >
  99 {
 100     static inline andoyer<Spheroid, CalculationType> apply(andoyer<Spheroid, CalculationType> const& input)
 101     {
 102         return input;
 103     }
 104 };
 105
 106 template <typename Spheroid, typename CalculationType, typename P1, typename P2>
 107 struct result_from_distance<andoyer<Spheroid, CalculationType>, P1, P2>
 108 {
 109     template <typename T>
 110     static inline typename return_type<andoyer<Spheroid, CalculationType>, P1, P2>::type
 111         apply(andoyer<Spheroid, CalculationType> const& , T const& value)
 112     {
 113         return value;
 114     }
 115 };
 116
 117
 118 } // namespace services
 119 #endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
 120
 121
 122 }} // namespace strategy::distance
 123
 124
 125 }} // namespace boost::geometry
 126
 127
 128 #endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_DISTANCE_DETAIL_HPP