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Diffstat (limited to 'boost/geometry/algorithms/detail/vincenty_inverse.hpp')
-rw-r--r-- | boost/geometry/algorithms/detail/vincenty_inverse.hpp | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/boost/geometry/algorithms/detail/vincenty_inverse.hpp b/boost/geometry/algorithms/detail/vincenty_inverse.hpp deleted file mode 100644 index fe05e95932..0000000000 --- a/boost/geometry/algorithms/detail/vincenty_inverse.hpp +++ /dev/null @@ -1,204 +0,0 @@ -// Boost.Geometry - -// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. - -// This file was modified by Oracle on 2014. -// Modifications copyright (c) 2014 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) - -#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_VINCENTY_INVERSE_HPP -#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_VINCENTY_INVERSE_HPP - - -#include <boost/math/constants/constants.hpp> - -#include <boost/geometry/core/radius.hpp> -#include <boost/geometry/core/srs.hpp> - -#include <boost/geometry/util/condition.hpp> -#include <boost/geometry/util/math.hpp> - -#include <boost/geometry/algorithms/detail/flattening.hpp> -#include <boost/geometry/algorithms/detail/result_inverse.hpp> - - -#ifndef BOOST_GEOMETRY_DETAIL_VINCENTY_MAX_STEPS -#define BOOST_GEOMETRY_DETAIL_VINCENTY_MAX_STEPS 1000 -#endif - - -namespace boost { namespace geometry { namespace detail -{ - -/*! -\brief The solution of the inverse problem of geodesics on latlong coordinates, after Vincenty, 1975 -\author See - - http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf - - http://www.icsm.gov.au/gda/gdav2.3.pdf -\author Adapted from various implementations to get it close to the original document - - http://www.movable-type.co.uk/scripts/LatLongVincenty.html - - http://exogen.case.edu/projects/geopy/source/geopy.distance.html - - http://futureboy.homeip.net/fsp/colorize.fsp?fileName=navigation.frink - -*/ -template <typename CT, bool EnableDistance, bool EnableAzimuth> -struct vincenty_inverse -{ - typedef result_inverse<CT> result_type; - -public: - template <typename T1, typename T2, typename Spheroid> - static inline result_type apply(T1 const& lon1, - T1 const& lat1, - T2 const& lon2, - T2 const& lat2, - Spheroid const& spheroid) - { - result_type result; - - if (math::equals(lat1, lat2) && math::equals(lon1, lon2)) - { - result.set(CT(0), CT(0)); - return result; - } - - CT const c1 = 1; - CT const c2 = 2; - CT const c3 = 3; - CT const c4 = 4; - CT const c16 = 16; - CT const c_e_12 = CT(1e-12); - - CT const pi = geometry::math::pi<CT>(); - CT const two_pi = c2 * pi; - - // lambda: difference in longitude on an auxiliary sphere - CT L = lon2 - lon1; - CT lambda = L; - - if (L < -pi) L += two_pi; - if (L > pi) L -= two_pi; - - CT const radius_a = CT(get_radius<0>(spheroid)); - CT const radius_b = CT(get_radius<2>(spheroid)); - CT const flattening = geometry::detail::flattening<CT>(spheroid); - - // U: reduced latitude, defined by tan U = (1-f) tan phi - CT const one_min_f = c1 - flattening; - CT const tan_U1 = one_min_f * tan(lat1); // above (1) - CT const tan_U2 = one_min_f * tan(lat2); // above (1) - - // calculate sin U and cos U using trigonometric identities - CT const temp_den_U1 = math::sqrt(c1 + math::sqr(tan_U1)); - CT const temp_den_U2 = math::sqrt(c1 + math::sqr(tan_U2)); - // cos = 1 / sqrt(1 + tan^2) - CT const cos_U1 = c1 / temp_den_U1; - CT const cos_U2 = c1 / temp_den_U2; - // sin = tan / sqrt(1 + tan^2) - CT const sin_U1 = tan_U1 / temp_den_U1; - CT const sin_U2 = tan_U2 / temp_den_U2; - - // calculate sin U and cos U directly - //CT const U1 = atan(tan_U1); - //CT const U2 = atan(tan_U2); - //cos_U1 = cos(U1); - //cos_U2 = cos(U2); - //sin_U1 = tan_U1 * cos_U1; // sin(U1); - //sin_U2 = tan_U2 * cos_U2; // sin(U2); - - CT previous_lambda; - CT sin_lambda; - CT cos_lambda; - CT sin_sigma; - CT sin_alpha; - CT cos2_alpha; - CT cos2_sigma_m; - CT sigma; - - int counter = 0; // robustness - - do - { - previous_lambda = lambda; // (13) - sin_lambda = sin(lambda); - cos_lambda = cos(lambda); - sin_sigma = math::sqrt(math::sqr(cos_U2 * sin_lambda) + math::sqr(cos_U1 * sin_U2 - sin_U1 * cos_U2 * cos_lambda)); // (14) - CT cos_sigma = sin_U1 * sin_U2 + cos_U1 * cos_U2 * cos_lambda; // (15) - sin_alpha = cos_U1 * cos_U2 * sin_lambda / sin_sigma; // (17) - cos2_alpha = c1 - math::sqr(sin_alpha); - cos2_sigma_m = math::equals(cos2_alpha, 0) ? 0 : cos_sigma - c2 * sin_U1 * sin_U2 / cos2_alpha; // (18) - - CT C = flattening/c16 * cos2_alpha * (c4 + flattening * (c4 - c3 * cos2_alpha)); // (10) - sigma = atan2(sin_sigma, cos_sigma); // (16) - lambda = L + (c1 - C) * flattening * sin_alpha * - (sigma + C * sin_sigma * ( cos2_sigma_m + C * cos_sigma * (-c1 + c2 * math::sqr(cos2_sigma_m)))); // (11) - - ++counter; // robustness - - } while ( geometry::math::abs(previous_lambda - lambda) > c_e_12 - && geometry::math::abs(lambda) < pi - && counter < BOOST_GEOMETRY_DETAIL_VINCENTY_MAX_STEPS ); // robustness - - if ( BOOST_GEOMETRY_CONDITION(EnableDistance) ) - { - // Oops getting hard here - // (again, problem is that ttmath cannot divide by doubles, which is OK) - CT const c1 = 1; - CT const c2 = 2; - CT const c3 = 3; - CT const c4 = 4; - CT const c6 = 6; - CT const c47 = 47; - CT const c74 = 74; - CT const c128 = 128; - CT const c256 = 256; - CT const c175 = 175; - CT const c320 = 320; - CT const c768 = 768; - CT const c1024 = 1024; - CT const c4096 = 4096; - CT const c16384 = 16384; - - //CT sqr_u = cos2_alpha * (math::sqr(radius_a) - math::sqr(radius_b)) / math::sqr(radius_b); // above (1) - CT sqr_u = cos2_alpha * ( math::sqr(radius_a / radius_b) - c1 ); // above (1) - - CT A = c1 + sqr_u/c16384 * (c4096 + sqr_u * (-c768 + sqr_u * (c320 - c175 * sqr_u))); // (3) - CT B = sqr_u/c1024 * (c256 + sqr_u * ( -c128 + sqr_u * (c74 - c47 * sqr_u))); // (4) - CT delta_sigma = B * sin_sigma * ( cos2_sigma_m + (B/c4) * (cos(sigma)* (-c1 + c2 * cos2_sigma_m) - - (B/c6) * cos2_sigma_m * (-c3 + c4 * math::sqr(sin_sigma)) * (-c3 + c4 * cos2_sigma_m))); // (6) - - result.distance = radius_b * A * (sigma - delta_sigma); // (19) - } - else - { - result.distance = CT(0); - } - - if ( BOOST_GEOMETRY_CONDITION(EnableAzimuth) ) - { - result.azimuth = atan2(cos_U2 * sin_lambda, cos_U1 * sin_U2 - sin_U1 * cos_U2 * cos_lambda); // (20) - } - else - { - result.azimuth = CT(0); - } - - return result; - } - -// inline CT azimuth21() const -// { -// // NOTE: signs of X and Y are different than in the original paper -// atan2(-cos_U1 * sin_lambda, sin_U1 * cos_U2 - cos_U1 * sin_U2 * cos_lambda); // (21) -// } -}; - -}}} // namespace boost::geometry::detail - - -#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_VINCENTY_INVERSE_HPP |