hi fitsbits,
On Mon, 8 Sep 2008, LC's NoSpam Newsreading account wrote:
5) definition of polygon
seems unclear. I presume m cannot be 3 (should be said)
Digons (two-sided polygons) with a positive area exist on the 2-sphere
(and dihedrons exist on the 3-sphere). However, the proposal seems to deal
with the pixel space in the tangent plane, so m = 3 would be a
reasonable constraint to reduce the chance of accidental programming
errors.
http://en.wikipedia.org/wiki/Digon
cheers
boud