libnova: precession.h Source File

00001 /*
00002  *  This library is free software; you can redistribute it and/or
00003  *  modify it under the terms of the GNU Lesser General Public
00004  *  License as published by the Free Software Foundation; either
00005  *  version 2 of the License, or (at your option) any later version.
00006  *
00007  *  This library is distributed in the hope that it will be useful,
00008  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00009  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00010  *  Lesser General Public License for more details.
00011  *
00012  *  You should have received a copy of the GNU General Public License
00013  *  along with this program; if not, write to the Free Software
00014  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00015  *  
00016  *  Copyright (C) 2000 - 2005 Liam Girdwood  
00017  */
00018 
00019 #ifndef _LN_PRECESSION_H
00020 #define _LN_PRECESSION_H
00021 
00022 #include <libnova/ln_types.h>
00023 
00024 #ifdef __cplusplus
00025 extern "C" {
00026 #endif
00027 
00041 /* Equ 20.2, 20.3, 20.4 pg 126 */
00042 void LIBNOVA_EXPORT ln_get_equ_prec (struct ln_equ_posn * mean_position, double JD, struct ln_equ_posn * position);
00043 
00049 /* Equ 20.2, 20.3, 20.4 pg 126 */
00050 void LIBNOVA_EXPORT ln_get_equ_prec2 (struct ln_equ_posn * mean_position, double fromJD, double toJD, struct ln_equ_posn * position);
00051 
00056 /* Equ 20.5, 20.6 pg 128 */
00057 void LIBNOVA_EXPORT ln_get_ecl_prec (struct ln_lnlat_posn * mean_position, double JD, struct ln_lnlat_posn * position); 
00058 
00059 #ifdef __cplusplus
00060 };
00061 #endif
00062 
00063 #endif