* September 1998. This code is based upon algorithms and data kindly
* provided by Mr. Paul Schlyter. (pausch@saaf.se).
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
+ * Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Id$
**************************************************************************/
/*************************************************************************
- * Star::Star(FGTime *t)
+ * Star::Star(double mjd)
* Public constructor for class Star
* Argument: The current time.
* the hard coded orbital elements our sun are passed to
* note that the word sun is avoided, in order to prevent some compilation
* problems on sun systems
************************************************************************/
-Star::Star(FGTime *t) :
+Star::Star(double mjd) :
CelestialBody (0.000000, 0.0000000000,
0.0000, 0.00000,
282.9404, 4.7093500E-5,
1.0000000, 0.000000,
0.016709, -1.151E-9,
- 356.0470, 0.98560025850, t)
+ 356.0470, 0.98560025850, mjd)
{
distance = 0.0;
}
/*************************************************************************
- * void Star::updatePosition(FGTime *t, Star *ourSun)
+ * void Star::updatePosition(double mjd, Star *ourSun)
*
* calculates the current position of our sun.
*************************************************************************/
-void Star::updatePosition(FGTime *t)
+void Star::updatePosition(double mjd)
{
double
actTime, eccAnom,
xv, yv, v, r,
- xe, ye, ze, ecl;
+ xe, ecl;
- updateOrbElements(t);
+ updateOrbElements(mjd);
- actTime = fgCalcActTime(t);
- ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime); // Angle in Radians
- eccAnom = fgCalcEccAnom(M, e); // Calculate the eccentric Anomaly (also known as solving Kepler's equation)
+ actTime = sgCalcActTime(mjd);
+ ecl = SGD_DEGREES_TO_RADIANS * (23.4393 - 3.563E-7 * actTime); // Angle in Radians
+ eccAnom = sgCalcEccAnom(M, e); // Calculate the eccentric Anomaly (also known as solving Kepler's equation)
xv = cos(eccAnom) - e;
yv = sqrt (1.0 - e*e) * sin(eccAnom);