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+#ifndef BOOST_GEOMETRY_PROJECTIONS_VANDG4_HPP
+#define BOOST_GEOMETRY_PROJECTIONS_VANDG4_HPP
+
+// Boost.Geometry - extensions-gis-projections (based on PROJ4)
+// This file is automatically generated. DO NOT EDIT.
+
+// Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
+
+// This file was modified by Oracle on 2017.
+// Modifications copyright (c) 2017, Oracle and/or its affiliates.
+// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle.
+
+// Use, modification and distribution is subject to the Boost Software License,
+// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// This file is converted from PROJ4, http://trac.osgeo.org/proj
+// PROJ4 is originally written by Gerald Evenden (then of the USGS)
+// PROJ4 is maintained by Frank Warmerdam
+// PROJ4 is converted to Boost.Geometry by Barend Gehrels
+
+// Last updated version of proj: 4.9.1
+
+// Original copyright notice:
+
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+#include <boost/geometry/util/math.hpp>
+
+#include <boost/geometry/srs/projections/impl/base_static.hpp>
+#include <boost/geometry/srs/projections/impl/base_dynamic.hpp>
+#include <boost/geometry/srs/projections/impl/projects.hpp>
+#include <boost/geometry/srs/projections/impl/factory_entry.hpp>
+
+namespace boost { namespace geometry
+{
+
+namespace srs { namespace par4
+{
+ struct vandg4 {};
+
+}} //namespace srs::par4
+
+namespace projections
+{
+ #ifndef DOXYGEN_NO_DETAIL
+ namespace detail { namespace vandg4
+ {
+
+ static const double TOL = 1e-10;
+ //static const double TWORPI = 0.63661977236758134308;
+
+ // template class, using CRTP to implement forward/inverse
+ template <typename CalculationType, typename Parameters>
+ struct base_vandg4_spheroid : public base_t_f<base_vandg4_spheroid<CalculationType, Parameters>,
+ CalculationType, Parameters>
+ {
+
+ typedef CalculationType geographic_type;
+ typedef CalculationType cartesian_type;
+
+
+ inline base_vandg4_spheroid(const Parameters& par)
+ : base_t_f<base_vandg4_spheroid<CalculationType, Parameters>,
+ CalculationType, Parameters>(*this, par) {}
+
+ // FORWARD(s_forward) spheroid
+ // Project coordinates from geographic (lon, lat) to cartesian (x, y)
+ inline void fwd(geographic_type& lp_lon, geographic_type& lp_lat, cartesian_type& xy_x, cartesian_type& xy_y) const
+ {
+ static const CalculationType HALFPI = detail::HALFPI<CalculationType>();
+ static const CalculationType TWORPI = detail::TWO_D_PI<CalculationType>();
+
+ CalculationType x1, t, bt, ct, ft, bt2, ct2, dt, dt2;
+
+ if (fabs(lp_lat) < TOL) {
+ xy_x = lp_lon;
+ xy_y = 0.;
+ } else if (fabs(lp_lon) < TOL || fabs(fabs(lp_lat) - HALFPI) < TOL) {
+ xy_x = 0.;
+ xy_y = lp_lat;
+ } else {
+ bt = fabs(TWORPI * lp_lat);
+ bt2 = bt * bt;
+ ct = 0.5 * (bt * (8. - bt * (2. + bt2)) - 5.)
+ / (bt2 * (bt - 1.));
+ ct2 = ct * ct;
+ dt = TWORPI * lp_lon;
+ dt = dt + 1. / dt;
+ dt = sqrt(dt * dt - 4.);
+ if ((fabs(lp_lon) - HALFPI) < 0.) dt = -dt;
+ dt2 = dt * dt;
+ x1 = bt + ct; x1 *= x1;
+ t = bt + 3.*ct;
+ ft = x1 * (bt2 + ct2 * dt2 - 1.) + (1.-bt2) * (
+ bt2 * (t * t + 4. * ct2) +
+ ct2 * (12. * bt * ct + 4. * ct2) );
+ x1 = (dt*(x1 + ct2 - 1.) + 2.*sqrt(ft)) /
+ (4.* x1 + dt2);
+ xy_x = HALFPI * x1;
+ xy_y = HALFPI * sqrt(1. + dt * fabs(x1) - x1 * x1);
+ if (lp_lon < 0.) xy_x = -xy_x;
+ if (lp_lat < 0.) xy_y = -xy_y;
+ }
+ }
+
+ static inline std::string get_name()
+ {
+ return "vandg4_spheroid";
+ }
+
+ };
+
+ // van der Grinten IV
+ template <typename Parameters>
+ inline void setup_vandg4(Parameters& par)
+ {
+ par.es = 0.;
+ }
+
+ }} // namespace detail::vandg4
+ #endif // doxygen
+
+ /*!
+ \brief van der Grinten IV projection
+ \ingroup projections
+ \tparam Geographic latlong point type
+ \tparam Cartesian xy point type
+ \tparam Parameters parameter type
+ \par Projection characteristics
+ - Miscellaneous
+ - Spheroid
+ - no inverse
+ \par Example
+ \image html ex_vandg4.gif
+ */
+ template <typename CalculationType, typename Parameters>
+ struct vandg4_spheroid : public detail::vandg4::base_vandg4_spheroid<CalculationType, Parameters>
+ {
+ inline vandg4_spheroid(const Parameters& par) : detail::vandg4::base_vandg4_spheroid<CalculationType, Parameters>(par)
+ {
+ detail::vandg4::setup_vandg4(this->m_par);
+ }
+ };
+
+ #ifndef DOXYGEN_NO_DETAIL
+ namespace detail
+ {
+
+ // Static projection
+ BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION(srs::par4::vandg4, vandg4_spheroid, vandg4_spheroid)
+
+ // Factory entry(s)
+ template <typename CalculationType, typename Parameters>
+ class vandg4_entry : public detail::factory_entry<CalculationType, Parameters>
+ {
+ public :
+ virtual base_v<CalculationType, Parameters>* create_new(const Parameters& par) const
+ {
+ return new base_v_f<vandg4_spheroid<CalculationType, Parameters>, CalculationType, Parameters>(par);
+ }
+ };
+
+ template <typename CalculationType, typename Parameters>
+ inline void vandg4_init(detail::base_factory<CalculationType, Parameters>& factory)
+ {
+ factory.add_to_factory("vandg4", new vandg4_entry<CalculationType, Parameters>);
+ }
+
+ } // namespace detail
+ #endif // doxygen
+
+} // namespace projections
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_PROJECTIONS_VANDG4_HPP
+