// Boost.Geometry - gis-projections (based on PROJ4)
// Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands.
// This file was modified by Oracle on 2017, 2018, 2019.
// Modifications copyright (c) 2017-2019, 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: 5.0.0
// 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.
#ifndef BOOST_GEOMETRY_PROJECTIONS_NSPER_HPP
#define BOOST_GEOMETRY_PROJECTIONS_NSPER_HPP
#include <boost/config.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/factory_entry.hpp>
#include <boost/geometry/srs/projections/impl/pj_param.hpp>
#include <boost/geometry/srs/projections/impl/projects.hpp>
#include <boost/geometry/util/math.hpp>
#include <boost/math/special_functions/hypot.hpp>
namespace boost { namespace geometry
{
namespace projections
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace nsper
{
static const double epsilon10 = 1.e-10;
enum mode_type {
n_pole = 0,
s_pole = 1,
equit = 2,
obliq = 3
};
template <typename T>
struct par_nsper
{
T height;
T sinph0;
T cosph0;
T p;
T rp;
T pn1;
T pfact;
T h;
T cg;
T sg;
T sw;
T cw;
mode_type mode;
bool tilt;
};
template <typename T, typename Parameters>
struct base_nsper_spheroid
{
par_nsper<T> m_proj_parm;
// FORWARD(s_forward) spheroid
// Project coordinates from geographic (lon, lat) to cartesian (x, y)
inline void fwd(Parameters const& , T const& lp_lon, T const& lp_lat, T& xy_x, T& xy_y) const
{
T coslam, cosphi, sinphi;
sinphi = sin(lp_lat);
cosphi = cos(lp_lat);
coslam = cos(lp_lon);
switch (this->m_proj_parm.mode) {
case obliq:
xy_y = this->m_proj_parm.sinph0 * sinphi + this->m_proj_parm.cosph0 * cosphi * coslam;
break;
case equit:
xy_y = cosphi * coslam;
break;
case s_pole:
xy_y = - sinphi;
break;
case n_pole:
xy_y = sinphi;
break;
}
if (xy_y < this->m_proj_parm.rp) {
BOOST_THROW_EXCEPTION( projection_exception(error_tolerance_condition) );
}
xy_y = this->m_proj_parm.pn1 / (this->m_proj_parm.p - xy_y);
xy_x = xy_y * cosphi * sin(lp_lon);
switch (this->m_proj_parm.mode) {
case obliq:
xy_y *= (this->m_proj_parm.cosph0 * sinphi -
this->m_proj_parm.sinph0 * cosphi * coslam);
break;
case equit:
xy_y *= sinphi;
break;
case n_pole:
coslam = - coslam;
BOOST_FALLTHROUGH;
case s_pole:
xy_y *= cosphi * coslam;
break;
}
if (this->m_proj_parm.tilt) {
T yt, ba;
yt = xy_y * this->m_proj_parm.cg + xy_x * this->m_proj_parm.sg;
ba = 1. / (yt * this->m_proj_parm.sw * this->m_proj_parm.h + this->m_proj_parm.cw);
xy_x = (xy_x * this->m_proj_parm.cg - xy_y * this->m_proj_parm.sg) * this->m_proj_parm.cw * ba;
xy_y = yt * ba;
}
}
// INVERSE(s_inverse) spheroid
// Project coordinates from cartesian (x, y) to geographic (lon, lat)
inline void inv(Parameters const& par, T xy_x, T xy_y, T& lp_lon, T& lp_lat) const
{
T rh, cosz, sinz;
if (this->m_proj_parm.tilt) {
T bm, bq, yt;
yt = 1./(this->m_proj_parm.pn1 - xy_y * this->m_proj_parm.sw);
bm = this->m_proj_parm.pn1 * xy_x * yt;
bq = this->m_proj_parm.pn1 * xy_y * this->m_proj_parm.cw * yt;
xy_x = bm * this->m_proj_parm.cg + bq * this->m_proj_parm.sg;
xy_y = bq * this->m_proj_parm.cg - bm * this->m_proj_parm.sg;
}
rh = boost::math::hypot(xy_x, xy_y);
if ((sinz = 1. - rh * rh * this->m_proj_parm.pfact) < 0.) {
BOOST_THROW_EXCEPTION( projection_exception(error_tolerance_condition) );
}
sinz = (this->m_proj_parm.p - sqrt(sinz)) / (this->m_proj_parm.pn1 / rh + rh / this->m_proj_parm.pn1);
cosz = sqrt(1. - sinz * sinz);
if (fabs(rh) <= epsilon10) {
lp_lon = 0.;
lp_lat = par.phi0;
} else {
switch (this->m_proj_parm.mode) {
case obliq:
lp_lat = asin(cosz * this->m_proj_parm.sinph0 + xy_y * sinz * this->m_proj_parm.cosph0 / rh);
xy_y = (cosz - this->m_proj_parm.sinph0 * sin(lp_lat)) * rh;
xy_x *= sinz * this->m_proj_parm.cosph0;
break;
case equit:
lp_lat = asin(xy_y * sinz / rh);
xy_y = cosz * rh;
xy_x *= sinz;
break;
case n_pole:
lp_lat = asin(cosz);
xy_y = -xy_y;
break;
case s_pole:
lp_lat = - asin(cosz);
break;
}
lp_lon = atan2(xy_x, xy_y);
}
}
static inline std::string get_name()
{
return "nsper_spheroid";
}
};
template <typename Params, typename Parameters, typename T>
inline void setup(Params const& params, Parameters& par, par_nsper<T>& proj_parm)
{
proj_parm.height = pj_get_param_f<T, srs::spar::h>(params, "h", srs::dpar::h);
if (proj_parm.height <= 0.)
BOOST_THROW_EXCEPTION( projection_exception(error_h_less_than_zero) );
if (fabs(fabs(par.phi0) - geometry::math::half_pi<T>()) < epsilon10)
proj_parm.mode = par.phi0 < 0. ? s_pole : n_pole;
else if (fabs(par.phi0) < epsilon10)
proj_parm.mode = equit;
else {
proj_parm.mode = obliq;
proj_parm.sinph0 = sin(par.phi0);
proj_parm.cosph0 = cos(par.phi0);
}
proj_parm.pn1 = proj_parm.height / par.a; /* normalize by radius */
proj_parm.p = 1. + proj_parm.pn1;
proj_parm.rp = 1. / proj_parm.p;
proj_parm.h = 1. / proj_parm.pn1;
proj_parm.pfact = (proj_parm.p + 1.) * proj_parm.h;
par.es = 0.;
}
// Near-sided perspective
template <typename Params, typename Parameters, typename T>
inline void setup_nsper(Params const& params, Parameters& par, par_nsper<T>& proj_parm)
{
proj_parm.tilt = false;
setup(params, par, proj_parm);
}
// Tilted perspective
template <typename Params, typename Parameters, typename T>
inline void setup_tpers(Params const& params, Parameters& par, par_nsper<T>& proj_parm)
{
T const omega = pj_get_param_r<T, srs::spar::tilt>(params, "tilt", srs::dpar::tilt);
T const gamma = pj_get_param_r<T, srs::spar::azi>(params, "azi", srs::dpar::azi);
proj_parm.tilt = true;
proj_parm.cg = cos(gamma); proj_parm.sg = sin(gamma);
proj_parm.cw = cos(omega); proj_parm.sw = sin(omega);
setup(params, par, proj_parm);
}
}} // namespace detail::nsper
#endif // doxygen
/*!
\brief Near-sided perspective projection
\ingroup projections
\tparam Geographic latlong point type
\tparam Cartesian xy point type
\tparam Parameters parameter type
\par Projection characteristics
- Azimuthal
- Spheroid
\par Projection parameters
- h: Height
\par Example
\image html ex_nsper.gif
*/
template <typename T, typename Parameters>
struct nsper_spheroid : public detail::nsper::base_nsper_spheroid<T, Parameters>
{
template <typename Params>
inline nsper_spheroid(Params const& params, Parameters & par)
{
detail::nsper::setup_nsper(params, par, this->m_proj_parm);
}
};
/*!
\brief Tilted perspective projection
\ingroup projections
\tparam Geographic latlong point type
\tparam Cartesian xy point type
\tparam Parameters parameter type
\par Projection characteristics
- Azimuthal
- Spheroid
\par Projection parameters
- tilt: Tilt, or Omega (real)
- azi: Azimuth (or Gamma) (real)
- h: Height
\par Example
\image html ex_tpers.gif
*/
template <typename T, typename Parameters>
struct tpers_spheroid : public detail::nsper::base_nsper_spheroid<T, Parameters>
{
template <typename Params>
inline tpers_spheroid(Params const& params, Parameters & par)
{
detail::nsper::setup_tpers(params, par, this->m_proj_parm);
}
};
#ifndef DOXYGEN_NO_DETAIL
namespace detail
{
// Static projection
BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_F(srs::spar::proj_nsper, nsper_spheroid)
BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_F(srs::spar::proj_tpers, tpers_spheroid)
// Factory entry(s)
BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(nsper_entry, nsper_spheroid)
BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(tpers_entry, tpers_spheroid)
BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(nsper_init)
{
BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(nsper, nsper_entry)
BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(tpers, tpers_entry)
}
} // namespace detail
#endif // doxygen
} // namespace projections
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_PROJECTIONS_NSPER_HPP