ceph/src/boost/boost/geometry/srs/projections/proj/goode.hpp

   1 // Boost.Geometry - gis-projections (based on PROJ4)
   2
   3 // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // This file was modified by Oracle on 2017, 2018, 2019.
   6 // Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
   7 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle.
   8
   9 // Use, modification and distribution is subject to the Boost Software License,
  10 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  11 // http://www.boost.org/LICENSE_1_0.txt)
  12
  13 // This file is converted from PROJ4, http://trac.osgeo.org/proj
  14 // PROJ4 is originally written by Gerald Evenden (then of the USGS)
  15 // PROJ4 is maintained by Frank Warmerdam
  16 // PROJ4 is converted to Boost.Geometry by Barend Gehrels
  17
  18 // Last updated version of proj: 5.0.0
  19
  20 // Original copyright notice:
  21
  22 // Permission is hereby granted, free of charge, to any person obtaining a
  23 // copy of this software and associated documentation files (the "Software"),
  24 // to deal in the Software without restriction, including without limitation
  25 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  26 // and/or sell copies of the Software, and to permit persons to whom the
  27 // Software is furnished to do so, subject to the following conditions:
  28
  29 // The above copyright notice and this permission notice shall be included
  30 // in all copies or substantial portions of the Software.
  31
  32 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  33 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  34 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  35 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  36 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  37 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  38 // DEALINGS IN THE SOFTWARE.
  39
  40 #ifndef BOOST_GEOMETRY_PROJECTIONS_GOODE_HPP
  41 #define BOOST_GEOMETRY_PROJECTIONS_GOODE_HPP
  42
  43 #include <boost/geometry/srs/projections/impl/base_static.hpp>
  44 #include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
  45 #include <boost/geometry/srs/projections/impl/projects.hpp>
  46 #include <boost/geometry/srs/projections/impl/factory_entry.hpp>
  47 #include <boost/geometry/srs/projections/proj/gn_sinu.hpp>
  48 #include <boost/geometry/srs/projections/proj/moll.hpp>
  49
  50 namespace boost { namespace geometry
  51 {
  52
  53 namespace projections
  54 {
  55     #ifndef DOXYGEN_NO_DETAIL
  56     namespace detail { namespace goode
  57     {
  58
  59             static const double Y_COR = 0.05280;
  60             static const double PHI_LIM = .71093078197902358062;
  61
  62             // TODO: It would be possible to further decrease the size of par_goode
  63             // because spherical sinu and moll has constant parameters.
  64
  65             template <typename T, typename Par>
  66             struct par_goode
  67             {
  68                 sinu_spheroid<T, Par>    sinu;
  69                 moll_spheroid<T, Par>    moll;
  70
  71                 // NOTE: It is ok to share parameters between projections because
  72                 // the only member that is modified in the constructors of
  73                 // spherical sinu and moll projections is es = 0 which is set
  74                 // below in setup_goode() anyway.
  75                 // Moreover in these projections parameters are not used
  76                 // in fwd() nor inv().
  77
  78                 template <typename Params>
  79                 par_goode(Params const& params, Par & par)
  80                     : sinu(params, par)
  81                     , moll(params, par)
  82                 {}
  83             };
  84
  85             template <typename T, typename Par>
  86             inline void s_forward(T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y,
  87                                   Par const& par, par_goode<T, Par> const& proj_par)
  88             {
  89                 if (fabs(lp_lat) <= PHI_LIM)
  90                     proj_par.sinu.fwd(par, lp_lon, lp_lat, xy_x, xy_y);
  91                 else {
  92                     proj_par.moll.fwd(par, lp_lon, lp_lat, xy_x, xy_y);
  93                     xy_y -= lp_lat >= 0.0 ? Y_COR : -Y_COR;
  94                 }
  95             }
  96
  97             template <typename T, typename Par>
  98             inline void s_inverse(T const& xy_x, T xy_y, T& lp_lon, T& lp_lat,
  99                                   Par const& par, par_goode<T, Par> const& proj_par)
 100             {
 101                 if (fabs(xy_y) <= PHI_LIM)
 102                     proj_par.sinu.inv(par, xy_x, xy_y, lp_lon, lp_lat);
 103                 else {
 104                     xy_y += xy_y >= 0.0 ? Y_COR : -Y_COR;
 105                     proj_par.moll.inv(par, xy_x, xy_y, lp_lon, lp_lat);
 106                 }
 107             }
 108
 109             // Goode Homolosine
 110             template <typename Par>
 111             inline Par& setup_goode(Par& par)
 112             {
 113                 par.es = 0.;
 114
 115                 // NOTE: The following explicit initialization of sinu projection
 116                 // is not needed because setup_goode() is called before proj_par.sinu
 117                 // is constructed and m_par of parent projection is used.
 118
 119                 //proj_par.sinu.m_par.es = 0.;
 120                 //detail::gn_sinu::setup_sinu(proj_par.sinu.m_par, proj_par.sinu.m_proj_parm);
 121
 122                 return par;
 123             }
 124
 125     }} // namespace detail::goode
 126     #endif // doxygen
 127
 128     /*!
 129         \brief Goode Homolosine projection
 130         \ingroup projections
 131         \tparam Geographic latlong point type
 132         \tparam Cartesian xy point type
 133         \tparam Parameters parameter type
 134         \par Projection characteristics
 135          - Pseudocylindrical
 136          - Spheroid
 137         \par Example
 138         \image html ex_goode.gif
 139     */
 140     template <typename T, typename Parameters>
 141     struct goode_spheroid
 142     {
 143         detail::goode::par_goode<T, Parameters> m_proj_parm;
 144
 145         template <typename Params>
 146         inline goode_spheroid(Params const& params, Parameters & par)
 147             : m_proj_parm(params, detail::goode::setup_goode(par))
 148         {}
 149
 150         // FORWARD(s_forward)  spheroid
 151         // Project coordinates from geographic (lon, lat) to cartesian (x, y)
 152         inline void fwd(Parameters const& par, T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
 153         {
 154             detail::goode::s_forward(lp_lon, lp_lat, xy_x, xy_y, par, this->m_proj_parm);
 155         }
 156
 157         // INVERSE(s_inverse)  spheroid
 158         // Project coordinates from cartesian (x, y) to geographic (lon, lat)
 159         inline void inv(Parameters const& par, T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
 160         {
 161             detail::goode::s_inverse(xy_x, xy_y, lp_lon, lp_lat, par, this->m_proj_parm);
 162         }
 163
 164         static inline std::string get_name()
 165         {
 166             return "goode_spheroid";
 167         }
 168     };
 169
 170     #ifndef DOXYGEN_NO_DETAIL
 171     namespace detail
 172     {
 173
 174         // Static projection
 175         BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_goode, goode_spheroid)
 176
 177         // Factory entry(s)
 178         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(goode_entry, goode_spheroid)
 179
 180         BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(goode_init)
 181         {
 182             BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(goode, goode_entry);
 183         }
 184
 185     } // namespace detail
 186     #endif // doxygen
 187
 188 } // namespace projections
 189
 190 }} // namespace boost::geometry
 191
 192 #endif // BOOST_GEOMETRY_PROJECTIONS_GOODE_HPP
 193