mirror of
https://github.com/cosinekitty/astronomy.git
synced 2026-01-22 14:31:50 -05:00
6abce518f6
Added the following iterator functions that wrap
search/next pairs of functions:
GlobalSolarEclipsesAfter
LocalSolarEclipsesAfter
LunarApsidesAfter
LunarEclipsesAfter
MoonNodesAfter
MoonQuartersAfter
PlanetApsidesAfter
TransitsAfter
I updated the following C# demos:
moonphase.cs ==> MoonQuartersAfter
lunar_eclipse.cs ==> LunarEclipsesAfter
Fixed an issue in the C# Markdown generator
so that it can now handle generic types like
`IEnumerable<MoonQuarterInfo>`.
69 lines
2.2 KiB
C#
69 lines
2.2 KiB
C#
using System;
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using System.Linq;
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using demo_helper;
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using CosineKitty;
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namespace lunar_eclipse
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{
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class Program
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{
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static int Main(string[] args)
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{
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AstroTime time;
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switch (args.Length)
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{
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case 0:
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time = new AstroTime(DateTime.Now);
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break;
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case 1:
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time = DemoHelper.ParseTime("lunar_eclipse", args[0]);
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break;
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default:
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Console.WriteLine("USAGE: lunar_eclipse [date]");
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return 1;
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}
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var eclipseList = Astronomy.LunarEclipsesAfter(time)
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.Where(eclipse => eclipse.kind != EclipseKind.Penumbral)
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.Take(10);
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foreach (LunarEclipseInfo eclipse in eclipseList)
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PrintEclipse(eclipse);
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return 0;
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}
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static void PrintEclipse(LunarEclipseInfo eclipse)
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{
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// Calculate beginning/ending of different phases
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// of an eclipse by subtracting/adding the peak time
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// with the number of minutes indicated by the "semi-duration"
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// fields sd_partial and sd_total.
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const double MINUTES_PER_DAY = 24 * 60;
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AstroTime p1 = eclipse.peak.AddDays(-eclipse.sd_partial / MINUTES_PER_DAY);
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Console.WriteLine("{0} Partial eclipse begins.", p1);
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if (eclipse.sd_total > 0.0)
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{
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AstroTime t1 = eclipse.peak.AddDays(-eclipse.sd_total / MINUTES_PER_DAY);
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Console.WriteLine("{0} Total eclipse begins.", t1);
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}
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Console.WriteLine("{0} Peak of {1} eclipse.", eclipse.peak, eclipse.kind.ToString().ToLowerInvariant());
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if (eclipse.sd_total > 0.0)
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{
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AstroTime t2 = eclipse.peak.AddDays(+eclipse.sd_total / MINUTES_PER_DAY);
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Console.WriteLine("{0} Total eclipse ends.", t2);
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}
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AstroTime p2 = eclipse.peak.AddDays(+eclipse.sd_partial / MINUTES_PER_DAY);
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Console.WriteLine("{0} Partial eclipse ends.", p2);
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Console.WriteLine();
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}
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}
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}
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