internal static Vector ConvertAltAzmToAxes(Vector altAz)
{
Vector axes = altAz;
switch (TelescopeHardware.AlignmentMode)
{
case ASCOM.DeviceInterface.AlignmentModes.algAltAz:
break;
case ASCOM.DeviceInterface.AlignmentModes.algGermanPolar:
axes = AstronomyFunctions.CalculateHaDec(altAz, TelescopeHardware.Latitude, TelescopeHardware.Longitude);
if (TelescopeHardware.Latitude < 0)
{
axes.Y = -axes.Y;
}
axes = RangeAltAzm(axes);
if (axes.X > 180.0 || axes.X < 0)
{
// adjust the targets to be through the pole
axes.X += 180;
axes.Y = 180 - axes.Y;
}
break;
case ASCOM.DeviceInterface.AlignmentModes.algPolar:
axes = AstronomyFunctions.CalculateHaDec(altAz, TelescopeHardware.Latitude, TelescopeHardware.Longitude);
if (TelescopeHardware.Latitude < 0)
{
axes.Y = -axes.Y;
}
axes = RangeAltAzm(axes);
break;
}
return(RangeAxes(axes));
}
internal static Vector ConvertAxesToAltAzm(Vector axes)
{
Vector altAzm = axes;
switch (TelescopeHardware.AlignmentMode)
{
case ASCOM.DeviceInterface.AlignmentModes.algAltAz:
break;
case ASCOM.DeviceInterface.AlignmentModes.algGermanPolar:
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 ASCOM.DeviceInterface.AlignmentModes.algPolar:
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));
}
internal static Vector ConvertAxesToRaDec(Vector axes)
{
Vector raDec = new Vector();
switch (TelescopeHardware.AlignmentMode)
{
case ASCOM.DeviceInterface.AlignmentModes.algAltAz:
raDec = AstronomyFunctions.CalculateRaDec(axes, TelescopeHardware.Latitude, TelescopeHardware.Longitude);
raDec.X /= 15.0; // Convert RA in degrees to hours - Added by Peter 4th August 2018 to fix the hand box RA displayed value when in Alt/Az mode
break;
case ASCOM.DeviceInterface.AlignmentModes.algGermanPolar:
case ASCOM.DeviceInterface.AlignmentModes.algPolar:
// undo through the pole
if (axes.Y > 90)
{
axes.X += 180.0;
axes.Y = 180 - axes.Y;
axes = RangeAltAzm(axes);
}
raDec.X = TelescopeHardware.SiderealTime - axes.X / 15.0;
raDec.Y = (TelescopeHardware.Latitude >= 0) ? axes.Y : -axes.Y;
break;
}
return(RangeRaDec(raDec));
}
/// <summary>
/// Calculate HA/Dec vector from AltAz vector - Return RA and Dec in degrees
/// </summary>
/// <param name="targetAltAzm"></param>
/// <param name="latitude"></param>
/// <param name="longitude"></param>
/// <returns>HA/Dec vector in degrees</returns>
internal static Vector CalculateHaDec(Vector targetAltAzm, double latitude, double longitude)
{
Vector raDec = new Vector();
var ra = AstronomyFunctions.CalculateRA(targetAltAzm.Y, targetAltAzm.X, latitude, longitude);
raDec.X = AstronomyFunctions.HourAngle(ra, longitude) * 15.0;
raDec.Y = AstronomyFunctions.CalculateDec(targetAltAzm.Y, targetAltAzm.X, latitude);
return(raDec);
}
/// <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 ASCOM.DeviceInterface.AlignmentModes.algAltAz:
axes = AstronomyFunctions.CalculateAltAzm(raDec.X, raDec.Y, TelescopeHardware.Latitude);
break;
case ASCOM.DeviceInterface.AlignmentModes.algGermanPolar:
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) ?
PierSide.pierEast : PierSide.pierWest;
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 ASCOM.DeviceInterface.AlignmentModes.algPolar:
axes.X = (TelescopeHardware.SiderealTime - raDec.X) * 15.0;
axes.Y = (TelescopeHardware.Latitude >= 0) ? raDec.Y : -raDec.Y;
break;
}
return(RangeAxes(axes));
}
