/// <summary>
/// return Nearest (30 days period) FullMoon Date and NewMoon Date
/// </summary>
/// <returns>Full Moon Date and New Moon Date</returns>
public static Tuple <DateTime, DateTime> GetFullNewMoonDate(DateTime date, double latitude, double longitude, TimeZoneInfo timezone)
{
//go to the night 00:00
DateTime new_date = new DateTime(date.Year, date.Month, date.Day, 0, 0, 0);
Sun sun = new Sun(new_date, latitude, longitude, timezone);
Moon moon = new Moon(new_date, latitude, longitude, timezone);
double illumination = GetMoonPhase(moon, sun);
//FULL MOON
DateTime fullmoon_date = new_date.AddHours((1.0 + illumination) * Moonmonth_hourcount / 2);
//NEW MOON
DateTime newmoon_date;
if (illumination < 0)
{
newmoon_date = new_date.AddHours((2.0 + illumination) * Moonmonth_hourcount / 2);
}
else
{
newmoon_date = new_date.AddHours((illumination) * Moonmonth_hourcount / 2);
}
return(new Tuple <DateTime, DateTime>(fullmoon_date, newmoon_date));
}
public static string GetMoonXml(Moon moon, Sun sun)
{
double illumination = Astro.GetMoonPhase(moon, sun);
var result = Astro.GetMoonPhase(illumination);
return(@"
<tile>
<visual branding='nameAndLogo' displayName='" + App.res.GetString("Moon") + @"'>
<binding template = 'TileSmall' >
<image src='Assets\tile-bg.png' placement='background'/>
<image src = '" + result.Item2 + @"' hint-removeMargin='true'/>
</binding >
<binding template='TileMedium'>
<image src='Assets\tile-bg.png' placement='background'/>
<group>
<subgroup hint-weight='1'>
<image src = '" + result.Item2 + @"' hint-removeMargin='true'/>
</subgroup>
<subgroup hint-weight='2' hint-textStacking='bottom'>
<text hint-align='center' hint-style='subtitle' >" + (moon.Result.NoDawn ? "--:--" : moon.Dawn.ToString("HH:mm")) + @"</text>
<text hint-align='center' hint-style='subtitle'>" + (moon.Result.NoDusk ? "--:--" : moon.Dusk.ToString("HH:mm")) + @"</text>
</subgroup>
</group>
</binding>
<binding template = 'TileWide' >
<image src='Assets\tile-bg.png' placement='background'/>
<group >
<subgroup hint-weight='1'>
<image src = '" + result.Item2 + @"' hint-removeMargin='true'/>
</subgroup>
<subgroup hint-weight='3'>
<text hint-align='center' hint-style='title'>" + (moon.Result.NoDawn ? "--:--" : moon.Dawn.ToString("HH:mm")) + @"</text>
<text hint-align='center' hint-style='title'>" + (moon.Result.NoDusk ? "--:--" : moon.Dusk.ToString("HH:mm")) + @"</text>
</subgroup>
</group>
</binding>
<binding template = 'TileLarge' >
<image src='Assets\tile-bg.png' placement='background'/>
<group >
<subgroup hint-weight='1'></subgroup>
<subgroup hint-weight='2' >
<image src='" + result.Item2 + @"' />
</subgroup>
<subgroup hint-weight='1'></subgroup>
</group>
<text hint-align='center' hint-style='base'>" + App.res.GetString("MoonDailyDawnTimeTxt/Text") + (moon.Result.NoDawn ? "--:--" : moon.Dawn.ToString("HH:mm")) + @"</text>
<text hint-align='center' hint-style='base'>" + App.res.GetString("MoonDailyDuskTimeTxt/Text") + (moon.Result.NoDusk ? "--:--" : moon.Dusk.ToString("HH:mm")) + @"</text>
</binding>
</visual>
</tile>
");
}
//return percent of illumination (from 0 to +-1.0)
//return positive value if moon is waxing crescent
//and negative - if waning moon
public static double GetMoonPhase(Moon m, Sun s)
{
var delta_lon = s.EclipLon - m.EclipLon;
if (delta_lon < 0)
{
delta_lon += 2 * Math.PI;
}
if (delta_lon <= Math.PI)
{
return(delta_lon / Math.PI);
}
else
{
return((delta_lon - 2 * Math.PI) / Math.PI);
}
}