[vorbis] square polar mapping - backgrounds

[al goldstein]

On Sat, 24 May 2003, Segher Boessenkool wrote:

Where is this mapping defined?

<p>> Ralph Giles wrote:
> > I always assumed this was something monty came up with independently. I
>
> I believe he did, yes.
>
> > suppose it's a bit like a polar version of the manhattan metric, but
> > I've never seen a reference to it elsewhere. The whole point is just to
> > avoid the trig functions.
>
> It's just a way to tile the plane.  Triangles/hexagons might
> have been better, but then again, maybe not.  Someone will have
> to try to find out ;)
>
>
> Segher
>
>
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