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- #ifndef BOOST_GEOMETRY_PROJECTIONS_MBTFPP_HPP
- #define BOOST_GEOMETRY_PROJECTIONS_MBTFPP_HPP
- #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 projections
- {
- #ifndef DOXYGEN_NO_DETAIL
- namespace detail { namespace mbtfpp
- {
- static const double CS_ = .95257934441568037152;
- static const double FXC = .92582009977255146156;
- static const double FYC = 3.40168025708304504493;
-
-
- static const double one_plus_eps = 1.0000001;
- template <typename T, typename Parameters>
- struct base_mbtfpp_spheroid
- {
-
-
- inline void fwd(Parameters const& , T const& lp_lon, T lp_lat, T& xy_x, T& xy_y) const
- {
- static const T C23 = detail::two_thirds<T>();
- static const T C13 = detail::third<T>();
- lp_lat = asin(CS_ * sin(lp_lat));
- xy_x = FXC * lp_lon * (2. * cos(C23 * lp_lat) - 1.);
- xy_y = FYC * sin(C13 * lp_lat);
- }
-
-
- inline void inv(Parameters const& , T const& xy_x, T const& xy_y, T& lp_lon, T& lp_lat) const
- {
- static const T half_pi = detail::half_pi<T>();
- static const T C23 = detail::two_thirds<T>();
- lp_lat = xy_y / FYC;
- if (fabs(lp_lat) >= 1.) {
- if (fabs(lp_lat) > one_plus_eps) {
- BOOST_THROW_EXCEPTION( projection_exception(error_tolerance_condition) );
- } else {
- lp_lat = (lp_lat < 0.) ? -half_pi : half_pi;
- }
- } else
- lp_lat = asin(lp_lat);
- lp_lon = xy_x / ( FXC * (2. * cos(C23 * (lp_lat *= 3.)) - 1.) );
- if (fabs(lp_lat = sin(lp_lat) / CS_) >= 1.) {
- if (fabs(lp_lat) > one_plus_eps) {
- BOOST_THROW_EXCEPTION( projection_exception(error_tolerance_condition) );
- } else {
- lp_lat = (lp_lat < 0.) ? -half_pi : half_pi;
- }
- } else
- lp_lat = asin(lp_lat);
- }
- static inline std::string get_name()
- {
- return "mbtfpp_spheroid";
- }
- };
-
- template <typename Parameters>
- inline void setup_mbtfpp(Parameters& par)
- {
- par.es = 0.;
- }
- }}
- #endif
-
- template <typename T, typename Parameters>
- struct mbtfpp_spheroid : public detail::mbtfpp::base_mbtfpp_spheroid<T, Parameters>
- {
- template <typename Params>
- inline mbtfpp_spheroid(Params const& , Parameters & par)
- {
- detail::mbtfpp::setup_mbtfpp(par);
- }
- };
- #ifndef DOXYGEN_NO_DETAIL
- namespace detail
- {
-
- BOOST_GEOMETRY_PROJECTIONS_DETAIL_STATIC_PROJECTION_FI(srs::spar::proj_mbtfpp, mbtfpp_spheroid)
-
- BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_ENTRY_FI(mbtfpp_entry, mbtfpp_spheroid)
- BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_BEGIN(mbtfpp_init)
- {
- BOOST_GEOMETRY_PROJECTIONS_DETAIL_FACTORY_INIT_ENTRY(mbtfpp, mbtfpp_entry)
- }
- }
- #endif
- }
- }}
- #endif
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