"Bill Hails" <bil### [at] europeyahoo-inccom> wrote in message
news:3e97d49b@news.povray.org...
> Does anyone know the precise value of the argument P1 (Period)
> to the f_helix1 and f_helix2 functions that will result in a
> single complete rotation, I've guestimated it as 6.2,
> hey that's 2 * 3.1 which is very nearly 3.14159... never mind.
>
> posting anyway.

It could be pi. Really not sure because the source code isn't something I
understand too well. It's worked out in the file fnintern.cpp, if you want
to see it there, and uses pi, 2*pi, and pi/180.

You said a single rotation... I get two for 2*pi and one for pi when used in
a default isosurface.

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