Hughes, B. wrote:

> "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.

It is pi, my 6.2 approx was actualy ~2 revolutions (a bit hung over after
friday night I suspect :-)

-- 
I would've gotten away with it too, if it wasn't for those pesky kids!

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