I just found another facet of what I assume is the same bug. Whether an axis angle is off 180° also depends on exactly what angle the axis is set at. Eg: 0° is wrong, 1° is right. I was playing with a circle with a 20 foot circumference when I noticed it. 180° was right also, so both 0° & 180° were pointing left.
(If you’re wondering, I was trying to make something like an Ironbridge coracle with a 10 foot circumference & forgot to divide the diameter by 2)
I have not yet prodded at that discovery further. Behold the Compass Rose!
CompassRose.val (1.9 KB)
@slspencer should I add this to the arc issue on GitHub, or make it an additional issue?