Re: gEDA-user: arc angle confusion

[DJ Delorie <dj@xxxxxxxxxxx>]

> DJ, yeah, right, I remember, but you've got to be on sizzurp (or
> high on edwin abbott abbott) to think clockwise means
> 'counterclockwise because if you were in the drawing it would be
> opposite.  'Clockwise' just doesn't work that way.

Yeah, it confused me for a while too.  To summarize reality:

Angle     X/Y    Screen

  0      x < 0    left
 90      y > 0    down
180      x > 0    right
270      y < 0    up

Given that 0 usually means "right" it's a little strange, and the HIDs
all add 180 degrees to the angles.