[vox-tech] [OT] Math question: help me make a rainbow

[Bill Kendrick]

On Wed, Apr 01, 2009 at 08:19:31PM -0700, Bill Broadley wrote:
> If P1 is lower and P2 is higher how do you
> decide on a radius that draws 1/4th of a circle (your first example), or more
> than a 1/4th and get a curve that goes above the higher point (as in your 3rd).

Because the arc is tied to a 1:1 circle, and not any ellipse.
Make sense?

-- 
-bill!
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