> Is the angle -90 equal to 270? This is trickier than it might seem. Is this a description of static geometry, or is this a delta that I'm going to want to i

> Is the angle -90 equal to 270? This is trickier than it might seem. Is this a description of static geometry, or is this a delta that I'm going to want to interpolate/integrate/etc? In the latter case, -90 is very different than 270, which is different than 630...