diff options
Diffstat (limited to 'boost/geometry/srs/projections/proj/gnom.hpp')
| -rw-r--r-- | boost/geometry/srs/projections/proj/gnom.hpp | 131 |
1 files changed, 67 insertions, 64 deletions
diff --git a/boost/geometry/srs/projections/proj/gnom.hpp b/boost/geometry/srs/projections/proj/gnom.hpp index d691c136b6..9276391a76 100644 --- a/boost/geometry/srs/projections/proj/gnom.hpp +++ b/boost/geometry/srs/projections/proj/gnom.hpp @@ -1,8 +1,4 @@ -#ifndef BOOST_GEOMETRY_PROJECTIONS_GNOM_HPP -#define BOOST_GEOMETRY_PROJECTIONS_GNOM_HPP - -// Boost.Geometry - extensions-gis-projections (based on PROJ4) -// This file is automatically generated. DO NOT EDIT. +// Boost.Geometry - gis-projections (based on PROJ4) // Copyright (c) 2008-2015 Barend Gehrels, Amsterdam, the Netherlands. @@ -19,7 +15,7 @@ // PROJ4 is maintained by Frank Warmerdam // PROJ4 is converted to Boost.Geometry by Barend Gehrels -// Last updated version of proj: 4.9.1 +// Last updated version of proj: 5.0.0 // Original copyright notice: @@ -41,6 +37,9 @@ // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. +#ifndef BOOST_GEOMETRY_PROJECTIONS_GNOM_HPP +#define BOOST_GEOMETRY_PROJECTIONS_GNOM_HPP + #include <boost/config.hpp> #include <boost/geometry/util/math.hpp> #include <boost/math/special_functions/hypot.hpp> @@ -65,72 +64,74 @@ namespace projections namespace detail { namespace gnom { - static const double EPS10 = 1.e-10; - static const int N_POLE = 0; - static const int S_POLE = 1; - static const int EQUIT = 2; - static const int OBLIQ = 3; + 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_gnom { T sinph0; T cosph0; - int mode; + mode_type mode; }; // template class, using CRTP to implement forward/inverse - template <typename CalculationType, typename Parameters> - struct base_gnom_spheroid : public base_t_fi<base_gnom_spheroid<CalculationType, Parameters>, - CalculationType, Parameters> + template <typename T, typename Parameters> + struct base_gnom_spheroid + : public base_t_fi<base_gnom_spheroid<T, Parameters>, T, Parameters> { - - typedef CalculationType geographic_type; - typedef CalculationType cartesian_type; - - par_gnom<CalculationType> m_proj_parm; + par_gnom<T> m_proj_parm; inline base_gnom_spheroid(const Parameters& par) - : base_t_fi<base_gnom_spheroid<CalculationType, Parameters>, - CalculationType, Parameters>(*this, par) {} + : base_t_fi<base_gnom_spheroid<T, Parameters>, T, 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 + inline void fwd(T& lp_lon, T& lp_lat, T& xy_x, T& xy_y) const { - CalculationType coslam, cosphi, sinphi; + T coslam, cosphi, sinphi; sinphi = sin(lp_lat); cosphi = cos(lp_lat); coslam = cos(lp_lon); + switch (this->m_proj_parm.mode) { - case EQUIT: + case equit: xy_y = cosphi * coslam; break; - case OBLIQ: + case obliq: xy_y = this->m_proj_parm.sinph0 * sinphi + this->m_proj_parm.cosph0 * cosphi * coslam; break; - case S_POLE: + case s_pole: xy_y = - sinphi; break; - case N_POLE: + case n_pole: xy_y = sinphi; break; } - if (xy_y <= EPS10) - BOOST_THROW_EXCEPTION( projection_exception(-20) ); + + if (xy_y <= epsilon10) { + BOOST_THROW_EXCEPTION( projection_exception(error_tolerance_condition) ); + } + xy_x = (xy_y = 1. / xy_y) * cosphi * sin(lp_lon); switch (this->m_proj_parm.mode) { - case EQUIT: + case equit: xy_y *= sinphi; break; - case OBLIQ: + case obliq: xy_y *= this->m_proj_parm.cosph0 * sinphi - this->m_proj_parm.sinph0 * cosphi * coslam; break; - case N_POLE: + case n_pole: coslam = - coslam; BOOST_FALLTHROUGH; - case S_POLE: + case s_pole: xy_y *= cosphi * coslam; break; } @@ -138,43 +139,44 @@ namespace projections // INVERSE(s_inverse) spheroid // Project coordinates from cartesian (x, y) to geographic (lon, lat) - inline void inv(cartesian_type& xy_x, cartesian_type& xy_y, geographic_type& lp_lon, geographic_type& lp_lat) const + inline void inv(T& xy_x, T& xy_y, T& lp_lon, T& lp_lat) const { - static const CalculationType HALFPI = detail::HALFPI<CalculationType>(); + static const T half_pi = detail::half_pi<T>(); - CalculationType rh, cosz, sinz; + T rh, cosz, sinz; rh = boost::math::hypot(xy_x, xy_y); sinz = sin(lp_lat = atan(rh)); cosz = sqrt(1. - sinz * sinz); - if (fabs(rh) <= EPS10) { + + if (fabs(rh) <= epsilon10) { lp_lat = this->m_par.phi0; lp_lon = 0.; } else { switch (this->m_proj_parm.mode) { - case OBLIQ: + case obliq: lp_lat = cosz * this->m_proj_parm.sinph0 + xy_y * sinz * this->m_proj_parm.cosph0 / rh; if (fabs(lp_lat) >= 1.) - lp_lat = lp_lat > 0. ? HALFPI : -HALFPI; + lp_lat = lp_lat > 0. ? half_pi : -half_pi; else lp_lat = asin(lp_lat); xy_y = (cosz - this->m_proj_parm.sinph0 * sin(lp_lat)) * rh; xy_x *= sinz * this->m_proj_parm.cosph0; break; - case EQUIT: + case equit: lp_lat = xy_y * sinz / rh; if (fabs(lp_lat) >= 1.) - lp_lat = lp_lat > 0. ? HALFPI : -HALFPI; + lp_lat = lp_lat > 0. ? half_pi : -half_pi; else lp_lat = asin(lp_lat); xy_y = cosz * rh; xy_x *= sinz; break; - case S_POLE: - lp_lat -= HALFPI; + case s_pole: + lp_lat -= half_pi; break; - case N_POLE: - lp_lat = HALFPI - lp_lat; + case n_pole: + lp_lat = half_pi - lp_lat; xy_y = -xy_y; break; } @@ -193,17 +195,18 @@ namespace projections template <typename Parameters, typename T> inline void setup_gnom(Parameters& par, par_gnom<T>& proj_parm) { - static const T HALFPI = detail::HALFPI<T>(); - - if (fabs(fabs(par.phi0) - HALFPI) < EPS10) - proj_parm.mode = par.phi0 < 0. ? S_POLE : N_POLE; - else if (fabs(par.phi0) < EPS10) - proj_parm.mode = EQUIT; - else { - proj_parm.mode = OBLIQ; + static const T half_pi = detail::half_pi<T>(); + + if (fabs(fabs(par.phi0) - half_pi) < 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); } + par.es = 0.; } @@ -222,10 +225,10 @@ namespace projections \par Example \image html ex_gnom.gif */ - template <typename CalculationType, typename Parameters> - struct gnom_spheroid : public detail::gnom::base_gnom_spheroid<CalculationType, Parameters> + template <typename T, typename Parameters> + struct gnom_spheroid : public detail::gnom::base_gnom_spheroid<T, Parameters> { - inline gnom_spheroid(const Parameters& par) : detail::gnom::base_gnom_spheroid<CalculationType, Parameters>(par) + inline gnom_spheroid(const Parameters& par) : detail::gnom::base_gnom_spheroid<T, Parameters>(par) { detail::gnom::setup_gnom(this->m_par, this->m_proj_parm); } @@ -239,20 +242,20 @@ namespace projections BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION(srs::par4::gnom, gnom_spheroid, gnom_spheroid) // Factory entry(s) - template <typename CalculationType, typename Parameters> - class gnom_entry : public detail::factory_entry<CalculationType, Parameters> + template <typename T, typename Parameters> + class gnom_entry : public detail::factory_entry<T, Parameters> { public : - virtual base_v<CalculationType, Parameters>* create_new(const Parameters& par) const + virtual base_v<T, Parameters>* create_new(const Parameters& par) const { - return new base_v_fi<gnom_spheroid<CalculationType, Parameters>, CalculationType, Parameters>(par); + return new base_v_fi<gnom_spheroid<T, Parameters>, T, Parameters>(par); } }; - template <typename CalculationType, typename Parameters> - inline void gnom_init(detail::base_factory<CalculationType, Parameters>& factory) + template <typename T, typename Parameters> + inline void gnom_init(detail::base_factory<T, Parameters>& factory) { - factory.add_to_factory("gnom", new gnom_entry<CalculationType, Parameters>); + factory.add_to_factory("gnom", new gnom_entry<T, Parameters>); } } // namespace detail |