internal static Vector ConvertAxesToAltAzm(Vector axes)
{
Vector altAzm = axes;
switch (TelescopeHardware.AlignmentMode)
{
case AlignmentMode.AltAz:
break;
case AlignmentMode.GermanPolar:
if (axes.Y > 90)
{
axes.X += 180;
axes.Y = 180 - axes.Y;
}
if (TelescopeHardware.Latitude < 0)
{
axes.Y = -axes.Y;
}
var ra = TelescopeHardware.SiderealTime - axes.X / 15.0;
altAzm = AstronomyFunctions.CalculateAltAzm(ra, axes.Y, TelescopeHardware.Latitude);
break;
case AlignmentMode.Polar:
ra = TelescopeHardware.SiderealTime - axes.X / 15.0;
if (TelescopeHardware.Latitude < 0)
{
axes.Y = -axes.Y;
}
altAzm = AstronomyFunctions.CalculateAltAzm(ra, axes.Y, TelescopeHardware.Latitude);
break;
}
return(RangeAltAzm(altAzm));
}
/// <summary>
/// convert a RaDec position to an axes positions.
/// </summary>
/// <param name="raDec"></param>
/// <param name="preserveSop">used for sync</param>
/// <returns></returns>
internal static Vector ConvertRaDecToAxes(Vector raDec, bool preserveSop = false)
{
Vector axes = new Vector();
switch (TelescopeHardware.AlignmentMode)
{
case AlignmentMode.AltAz:
axes = AstronomyFunctions.CalculateAltAzm(raDec.X, raDec.Y, TelescopeHardware.Latitude);
break;
case AlignmentMode.GermanPolar:
var sop = TelescopeHardware.SideOfPier;
axes.X = (TelescopeHardware.SiderealTime - raDec.X) * 15.0;
axes.Y = (TelescopeHardware.Latitude >= 0) ? raDec.Y : -raDec.Y;
axes.X = RangeAzm(axes.X);
if (axes.X > 180.0 || axes.X < 0)
{
// adjust the targets to be through the pole
axes.X += 180;
axes.Y = 180 - axes.Y;
}
var newsop = (axes.Y <= 90 && axes.Y >= -90) ?
PointingState.Normal : PointingState.ThroughThePole;
if (preserveSop && newsop != sop)
{
if (TelescopeHardware.NoSyncPastMeridian)
{
throw new InvalidOperationException("Sync is not allowed when the mount has tracked past the meridian");
}
axes.X -= 180;
axes.Y = 180 - axes.Y;
}
break;
case AlignmentMode.Polar:
axes.X = (TelescopeHardware.SiderealTime - raDec.X) * 15.0;
axes.Y = (TelescopeHardware.Latitude >= 0) ? raDec.Y : -raDec.Y;
break;
}
return(RangeAxes(axes));
}
