static int Main(string[] args)
{
AstroTime time;
switch (args.Length)
{
case 0:
time = new AstroTime(DateTime.Now);
break;
case 1:
time = DemoHelper.ParseTime("moonphase", args[0]);
break;
default:
Console.WriteLine("USAGE: moonphase [date]");
return(1);
}
/*
* Calculate the Moon's current phase angle,
* which ranges from 0 to 360 degrees.
*
* 0 = new moon,
* 90 = first quarter,
* 180 = full moon,
* 270 = third quarter.
*/
double phase = Astronomy.MoonPhase(time);
Console.WriteLine("{0} : Moon's phase angle = {1:0.000000} degrees.", time, phase);
/* Find the next 10 lunar quarter phases. */
Console.WriteLine();
Console.WriteLine("The next 10 lunar quarters are:");
MoonQuarterInfo mq = Astronomy.SearchMoonQuarter(time);
for (int i = 0; i < 10; ++i)
{
if (i > 0)
{
mq = Astronomy.NextMoonQuarter(mq);
}
Console.WriteLine("{0} : {1}", mq.time, QuarterName(mq.quarter));
}
return(0);
}