private double GetHourAngleFromAngle(Angle raAxisAngle)
{
double hours = HourAngle.DegreesToHours(AstroConvert.Range360Degrees(360.0 - raAxisAngle.Value));
if (Hemisphere == HemisphereOption.Northern)
{
return(AstroConvert.RangeRA(hours + 6.0));
}
else
{
return(AstroConvert.RangeRA((24.0 - hours) + 6.0));
}
}
private Angle GetAngleFromHourAngle(double hourAngle)
{
double ha = 0.0;
double degrees;
if (Hemisphere == HemisphereOption.Northern)
{
ha = AstroConvert.RangeRA(hourAngle - 6.0); // Renormalise from a perpendicular position
degrees = HourAngle.HoursToDegrees(ha);
}
else
{
System.Diagnostics.Debug.Assert(false, "GetAngleFromHours not tested for Southern Hemisphere");
ha = AstroConvert.RangeRA((24 - hourAngle) - 6.0); // Renormalise from a perpendicular position
degrees = HourAngle.HoursToDegrees(ha);
}
return(AstroConvert.Range360Degrees(360.0 - degrees));
}
private Angle GetAngleFromDecDegrees(double angle, bool flipDEC)
{
double offset = -90.0; // This may vary in the future if zero degrees is no longer at 12-0-clock
double result = 0.0;
if (Hemisphere == HemisphereOption.Southern)
{
angle = 360.0 - angle;
}
if (angle > 180.0 && !flipDEC)
{
result = offset - angle;
}
else
{
result = angle + offset;
}
// This routine works clockwise so need to convert to Anti-clockwise
result = AstroConvert.Range360Degrees(360 + result);
return(result);
}
private double GetDecDegreesFromAngle(Angle decAxisAngle)
{
double i = 0.0;
if (decAxisAngle.Value >= 180)
{
i = decAxisAngle.Value - 270.0;
}
else
{
i = 90.0 - decAxisAngle.Value;
}
if (Hemisphere == HemisphereOption.Northern)
{
return(AstroConvert.Range360Degrees(i));
}
else
{
return(AstroConvert.Range360Degrees(360.0 - i));
}
}
