scem_c.h (1485B)
1 /* Copyright (C) 2025 |Méso|Star> (contact@meso-star.com) 2 * 3 * This program is free software: you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation, either version 3 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. */ 15 16 #ifndef SCEM_C_H 17 #define SCEM_C_H 18 19 #include "scem.h" 20 #include <rsys/rsys.h> 21 22 struct celestial_coords { /* right-ascension, declination */ 23 double right_ascension; /* [rad] */ 24 double declination; /* [rad] */ 25 }; 26 static const struct celestial_coords CELESTIAL_COORDS_NULL = {0}; 27 28 struct ecliptic_coords { 29 double longitude; /* [rad] */ 30 double obliquity; /* [rad] */ 31 }; 32 static const struct ecliptic_coords ECLIPTIC_COORDS_NULL = {0}; 33 34 extern LOCAL_SYM res_T 35 sun_position_from_earth_psa 36 (const struct tm* time, /* In UTC */ 37 const struct scem_location* pos, 38 struct scem_sun_pos* sun); 39 40 extern LOCAL_SYM res_T 41 sun_position_from_earth_meeus 42 (const struct tm* time, /* In UTC */ 43 const struct scem_location* pos, 44 struct scem_sun_pos* sun); 45 46 #endif /* SCEM_C_H */