56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
/*+
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ARES/HADES/BORG Package -- ./libLSS/data/angtools.hpp
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Copyright (C) 2014-2020 Guilhem Lavaux <guilhem.lavaux@iap.fr>
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Copyright (C) 2009-2020 Jens Jasche <jens.jasche@fysik.su.se>
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Additional contributions from:
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Guilhem Lavaux <guilhem.lavaux@iap.fr> (2023)
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+*/
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#ifndef __LIBLSS_ANGTOOLS_HPP
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#define __LIBLSS_ANGTOOLS_HPP
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#include <cmath>
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namespace LibLSS {
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template <typename T, typename Array>
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void ang2vec(T ra, T dec, Array &xyz) {
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T c_ra = std::cos(ra), s_ra = std::sin(ra), c_dec = std::cos(dec),
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s_dec = std::sin(dec);
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xyz[0] = c_ra * c_dec;
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xyz[1] = s_ra * c_dec;
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xyz[2] = s_dec;
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}
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template <typename T, typename Array>
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void vec2ang(Array xyz, T &ra, T &dec) {
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T c_r = std::sqrt(xyz[0] * xyz[0] + xyz[1] * xyz[1] + xyz[2] * xyz[2]);
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ra = std::atan2(xyz[1], xyz[0]);
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dec = 0.;
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if (c_r > 0)
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dec = std::asin(xyz[2] / c_r);
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}
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template <typename T, typename Array>
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void vec2ang(Array xyz, T &ra, T &dec, T &r) {
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r = std::sqrt(xyz[0] * xyz[0] + xyz[1] * xyz[1] + xyz[2] * xyz[2]);
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ra = std::atan2(xyz[1], xyz[0]);
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dec = 0.;
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if (r > 0)
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dec = std::asin(xyz[2] / r);
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}
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}; // namespace LibLSS
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#endif
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