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_AUGUST_HPP 41 #define BOOST_GEOMETRY_PROJECTIONS_AUGUST_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 48 namespace boost { namespace geometry 49 { 50 51 namespace projections 52 { 53 #ifndef DOXYGEN_NO_DETAIL 54 namespace detail { namespace august 55 { 56 57 //static const double M = 1.333333333333333; 58 59 template <typename T, typename Parameters> 60 struct base_august_spheroid 61 { 62 // FORWARD(s_forward) spheroid 63 // Project coordinates from geographic (lon, lat) to cartesian (x, y) fwdboost::geometry::projections::detail::august::base_august_spheroid64 inline void fwd(Parameters const& , T lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const 65 { 66 static const T M = 1.333333333333333333333333333333333333; 67 68 T t, c1, c, x1, x12, y1, y12; 69 70 t = tan(.5 * lp_lat); 71 c1 = sqrt(1. - t * t); 72 c = 1. + c1 * cos(lp_lon *= .5); 73 x1 = sin(lp_lon) * c1 / c; 74 y1 = t / c; 75 xy_x = M * x1 * (3. + (x12 = x1 * x1) - 3. * (y12 = y1 * y1)); 76 xy_y = M * y1 * (3. + 3. * x12 - y12); 77 } 78 get_nameboost::geometry::projections::detail::august::base_august_spheroid79 static inline std::string get_name() 80 { 81 return "august_spheroid"; 82 } 83 84 }; 85 86 // August Epicycloidal 87 template <typename Parameters> setup_august(Parameters & par)88 inline void setup_august(Parameters& par) 89 { 90 par.es = 0.; 91 } 92 93 }} // namespace detail::august 94 #endif // doxygen 95 96 /*! 97 \brief August Epicycloidal projection 98 \ingroup projections 99 \tparam Geographic latlong point type 100 \tparam Cartesian xy point type 101 \tparam Parameters parameter type 102 \par Projection characteristics 103 - Miscellaneous 104 - Spheroid 105 - no inverse 106 \par Example 107 \image html ex_august.gif 108 */ 109 template <typename T, typename Parameters> 110 struct august_spheroid : public detail::august::base_august_spheroid<T, Parameters> 111 { 112 template <typename Params> august_spheroidboost::geometry::projections::august_spheroid113 inline august_spheroid(Params const& , Parameters & par) 114 { 115 detail::august::setup_august(par); 116 } 117 }; 118 119 #ifndef DOXYGEN_NO_DETAIL 120 namespace detail 121 { 122 123 // Static projection BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_F(srs::spar::proj_august,august_spheroid)124 BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_F(srs::spar::proj_august, august_spheroid) 125 126 // Factory entry(s) 127 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_F(august_entry, august_spheroid) 128 129 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(august_init) 130 { 131 BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(august, august_entry) 132 } 133 134 } // namespace detail 135 #endif // doxygen 136 137 } // namespace projections 138 139 }} // namespace boost::geometry 140 141 #endif // BOOST_GEOMETRY_PROJECTIONS_AUGUST_HPP 142 143