static void PrintEclipse(LunarEclipseInfo eclipse)
{
// Calculate beginning/ending of different phases
// of an eclipse by subtracting/adding the peak time
// with the number of minutes indicated by the "semi-duration"
// fields sd_partial and sd_total.
const double MINUTES_PER_DAY = 24 * 60;
AstroTime p1 = eclipse.peak.AddDays(-eclipse.sd_partial / MINUTES_PER_DAY);
Console.WriteLine("{0} Partial eclipse begins.", p1);
if (eclipse.sd_total > 0.0)
{
AstroTime t1 = eclipse.peak.AddDays(-eclipse.sd_total / MINUTES_PER_DAY);
Console.WriteLine("{0} Total eclipse begins.", t1);
}
Console.WriteLine("{0} Peak of {1} eclipse.", eclipse.peak, eclipse.kind.ToString().ToLowerInvariant());
if (eclipse.sd_total > 0.0)
{
AstroTime t2 = eclipse.peak.AddDays(+eclipse.sd_total / MINUTES_PER_DAY);
Console.WriteLine("{0} Total eclipse ends.", t2);
}
AstroTime p2 = eclipse.peak.AddDays(+eclipse.sd_partial / MINUTES_PER_DAY);
Console.WriteLine("{0} Partial eclipse ends.", p2);
Console.WriteLine();
}
static int Main(string[] args)
{
AstroTime time;
switch (args.Length)
{
case 0:
time = new AstroTime(DateTime.Now);
break;
case 1:
time = DemoHelper.ParseTime("lunar_eclipse", args[0]);
break;
default:
Console.WriteLine("USAGE: lunar_eclipse [date]");
return(1);
}
int count = 0;
LunarEclipseInfo eclipse = Astronomy.SearchLunarEclipse(time);
for (;;)
{
if (eclipse.kind != EclipseKind.Penumbral)
{
PrintEclipse(eclipse);
if (++count == 10)
{
break;
}
}
eclipse = Astronomy.NextLunarEclipse(eclipse.peak);
}
return(0);
}
