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_COLLG_HPP 41 #define BOOST_GEOMETRY_PROJECTIONS_COLLG_HPP 42 43 #include <boost/geometry/util/math.hpp> 44 45 #include <boost/geometry/srs/projections/impl/base_static.hpp> 46 #include <boost/geometry/srs/projections/impl/base_dynamic.hpp> 47 #include <boost/geometry/srs/projections/impl/projects.hpp> 48 #include <boost/geometry/srs/projections/impl/factory_entry.hpp> 49 50 namespace boost { namespace geometry 51 { 52 53 namespace projections 54 { 55 #ifndef DOXYGEN_NO_DETAIL 56 namespace detail { namespace collg 57 { 58 59 static const double FXC = 1.12837916709551257390; 60 static const double FYC = 1.77245385090551602729; 61 static const double one_plus_eps = 1.0000001; 62 63 template <typename T, typename Parameters> 64 struct base_collg_spheroid 65 { 66 // FORWARD(s_forward) spheroid 67 // Project coordinates from geographic (lon, lat) to cartesian (x, y) fwdboost::geometry::projections::detail::collg::base_collg_spheroid68 inline void fwd(Parameters const& , T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const 69 { 70 if ((xy_y = 1. - sin(lp_lat)) <= 0.) 71 xy_y = 0.; 72 else 73 xy_y = sqrt(xy_y); 74 xy_x = FXC * lp_lon * xy_y; 75 xy_y = FYC * (1. - xy_y); 76 } 77 78 // INVERSE(s_inverse) spheroid 79 // Project coordinates from cartesian (x, y) to geographic (lon, lat) invboost::geometry::projections::detail::collg::base_collg_spheroid80 inline void inv(Parameters const& , T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const 81 { 82 static T const half_pi = detail::half_pi<T>(); 83 84 lp_lat = xy_y / FYC - 1.; 85 if (fabs(lp_lat = 1. - lp_lat * lp_lat) < 1.) 86 lp_lat = asin(lp_lat); 87 else if (fabs(lp_lat) > one_plus_eps) { 88 BOOST_THROW_EXCEPTION( projection_exception(error_tolerance_condition) ); 89 } else { 90 lp_lat = lp_lat < 0. ? -half_pi : half_pi; 91 } 92 93 if ((lp_lon = 1. - sin(lp_lat)) <= 0.) 94 lp_lon = 0.; 95 else 96 lp_lon = xy_x / (FXC * sqrt(lp_lon)); 97 } 98 get_nameboost::geometry::projections::detail::collg::base_collg_spheroid99 static inline std::string get_name() 100 { 101 return "collg_spheroid"; 102 } 103 104 }; 105 106 // Collignon 107 template <typename Parameters> setup_collg(Parameters & par)108 inline void setup_collg(Parameters& par) 109 { 110 par.es = 0.; 111 } 112 113 }} // namespace collg 114 #endif // doxygen 115 116 /*! 117 \brief Collignon projection 118 \ingroup projections 119 \tparam Geographic latlong point type 120 \tparam Cartesian xy point type 121 \tparam Parameters parameter type 122 \par Projection characteristics 123 - Pseudocylindrical 124 - Spheroid 125 \par Example 126 \image html ex_collg.gif 127 */ 128 template <typename T, typename Parameters> 129 struct collg_spheroid : public detail::collg::base_collg_spheroid<T, Parameters> 130 { 131 template <typename Params> collg_spheroidboost::geometry::projections::collg_spheroid132 inline collg_spheroid(Params const& , Parameters & par) 133 { 134 detail::collg::setup_collg(par); 135 } 136 }; 137 138 #ifndef DOXYGEN_NO_DETAIL 139 namespace detail 140 { 141 142 // Static projection BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_collg,collg_spheroid)143 BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_collg, collg_spheroid) 144 145 // Factory entry(s) 146 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(collg_entry, collg_spheroid) 147 148 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(collg_init) 149 { 150 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(collg, collg_entry); 151 } 152 153 } // namespace detail 154 #endif // doxygen 155 156 } // namespace projections 157 158 }} // namespace boost::geometry 159 160 #endif // BOOST_GEOMETRY_PROJECTIONS_COLLG_HPP 161 162