// return values are in sun.arunodaya, sun.rise, sun.set, sun.noon, sun.length
// if values are less than zero, that means, no sunrise, no sunset in that day
//
// brahma 1 = calculation at brahma muhurta begining
// brahma 0 = calculation at sunrise
public void SunCalc(GPGregorianTime vct, GPLocationProvider earth)
{
if (sunPosMethod == SUNPOSMETHOD_CALCULATOR)
{
GPSun s_rise = new GPSun();
GPSun s_set = new GPSun();
// first calculation
// for 12:00 universal time
s_rise.calculateRise(vct, earth);
// first calculation
// for 12:00 universal time
s_set.calculateSet(vct, earth);
// calculate times
longitude_arun_deg = s_rise.eclipticalLongitude - (24.0 / 365.25);
eclipticalLongitude = s_rise.eclipticalLongitude;
rightAscession = s_rise.rightAscession;
longitude_set_deg = s_set.eclipticalLongitude;
sunrise_deg = s_rise.sunrise_deg;
sunset_deg = s_set.sunset_deg;
}
else
{
calculateRiseSet(vct, earth, 180);
double gmt = vct.getJulianGreenwichNoon();
longitude_arun_deg = GPAstroEngine.sunLongitudeMethodM(julianDayRise - 96 / 1440.0);
eclipticalLongitude = GPAstroEngine.sunLongitudeMethodM(julianDayRise);
longitude_set_deg = GPAstroEngine.sunLongitudeMethodM(julianDaySet);
}
updateSunriseTimes(vct, earth);
updateNoonTimes(vct, earth);
updateSetTimes(vct, earth);
List <GPLocationChange> chr = earth.getChangesForJulianDay(arunodaya.getJulianGreenwichNoon());
processTravellingChanges(chr);
// finally calculate length of the daylight
DayLength = (set.getJulianGreenwichTime() - rise.getJulianGreenwichTime()) * 24.0;
}