194 lines
7.2 KiB
C++
194 lines
7.2 KiB
C++
// Boost.Geometry - gis-projections (based on PROJ4)
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// Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// This file was modified by Oracle on 2017, 2018, 2019.
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// Modifications copyright (c) 2017-2019, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// This file is converted from PROJ4, http://trac.osgeo.org/proj
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// PROJ4 is originally written by Gerald Evenden (then of the USGS)
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// PROJ4 is maintained by Frank Warmerdam
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// PROJ4 is converted to Boost.Geometry by Barend Gehrels
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// Last updated version of proj: 5.0.0
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// Original copyright notice:
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#ifndef BOOST_GEOMETRY_PROJECTIONS_GOODE_HPP
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#define BOOST_GEOMETRY_PROJECTIONS_GOODE_HPP
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#include <boost/geometry/srs/projections/impl/base_static.hpp>
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#include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
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#include <boost/geometry/srs/projections/impl/projects.hpp>
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#include <boost/geometry/srs/projections/impl/factory_entry.hpp>
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#include <boost/geometry/srs/projections/proj/gn_sinu.hpp>
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#include <boost/geometry/srs/projections/proj/moll.hpp>
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namespace boost { namespace geometry
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{
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namespace projections
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace goode
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{
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static const double Y_COR = 0.05280;
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static const double PHI_LIM = .71093078197902358062;
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// TODO: It would be possible to further decrease the size of par_goode
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// because spherical sinu and moll has constant parameters.
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template <typename T, typename Par>
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struct par_goode
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{
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sinu_spheroid<T, Par> sinu;
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moll_spheroid<T, Par> moll;
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// NOTE: It is ok to share parameters between projections because
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// the only member that is modified in the constructors of
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// spherical sinu and moll projections is es = 0 which is set
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// below in setup_goode() anyway.
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// Moreover in these projections parameters are not used
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// in fwd() nor inv().
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template <typename Params>
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par_goode(Params const& params, Par & par)
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: sinu(params, par)
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, moll(params, par)
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{}
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};
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template <typename T, typename Par>
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inline void s_forward(T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y,
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Par const& par, par_goode<T, Par> const& proj_par)
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{
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if (fabs(lp_lat) <= PHI_LIM)
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proj_par.sinu.fwd(par, lp_lon, lp_lat, xy_x, xy_y);
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else {
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proj_par.moll.fwd(par, lp_lon, lp_lat, xy_x, xy_y);
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xy_y -= lp_lat >= 0.0 ? Y_COR : -Y_COR;
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}
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}
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template <typename T, typename Par>
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inline void s_inverse(T const& xy_x, T xy_y, T& lp_lon, T& lp_lat,
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Par const& par, par_goode<T, Par> const& proj_par)
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{
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if (fabs(xy_y) <= PHI_LIM)
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proj_par.sinu.inv(par, xy_x, xy_y, lp_lon, lp_lat);
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else {
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xy_y += xy_y >= 0.0 ? Y_COR : -Y_COR;
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proj_par.moll.inv(par, xy_x, xy_y, lp_lon, lp_lat);
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}
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}
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// Goode Homolosine
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template <typename Par>
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inline Par& setup_goode(Par& par)
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{
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par.es = 0.;
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// NOTE: The following explicit initialization of sinu projection
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// is not needed because setup_goode() is called before proj_par.sinu
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// is constructed and m_par of parent projection is used.
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//proj_par.sinu.m_par.es = 0.;
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//detail::gn_sinu::setup_sinu(proj_par.sinu.m_par, proj_par.sinu.m_proj_parm);
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return par;
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}
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}} // namespace detail::goode
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#endif // doxygen
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/*!
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\brief Goode Homolosine projection
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\ingroup projections
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\tparam Geographic latlong point type
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\tparam Cartesian xy point type
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\tparam Parameters parameter type
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\par Projection characteristics
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- Pseudocylindrical
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- Spheroid
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\par Example
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\image html ex_goode.gif
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*/
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template <typename T, typename Parameters>
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struct goode_spheroid
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{
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detail::goode::par_goode<T, Parameters> m_proj_parm;
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template <typename Params>
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inline goode_spheroid(Params const& params, Parameters & par)
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: m_proj_parm(params, detail::goode::setup_goode(par))
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{}
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// FORWARD(s_forward) spheroid
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// Project coordinates from geographic (lon, lat) to cartesian (x, y)
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inline void fwd(Parameters const& par, T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
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{
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detail::goode::s_forward(lp_lon, lp_lat, xy_x, xy_y, par, this->m_proj_parm);
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}
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// INVERSE(s_inverse) spheroid
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// Project coordinates from cartesian (x, y) to geographic (lon, lat)
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inline void inv(Parameters const& par, T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
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{
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detail::goode::s_inverse(xy_x, xy_y, lp_lon, lp_lat, par, this->m_proj_parm);
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}
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static inline std::string get_name()
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{
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return "goode_spheroid";
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}
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};
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail
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{
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// Static projection
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BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_goode, goode_spheroid)
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// Factory entry(s)
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BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(goode_entry, goode_spheroid)
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BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(goode_init)
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{
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BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(goode, goode_entry);
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}
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} // namespace detail
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#endif // doxygen
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} // namespace projections
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_PROJECTIONS_GOODE_HPP
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