On 1/6/2016 12:48 AM, Mike Horvath wrote:
> How do I create a spiral tube, like a spring? Like this:
>
> http://www.f-lohmueller.de/pov_tut/animate/anim16e.htm
>
> but a single object, not a union of spheres?
>
> Thanks!
>
>
> Mike

I found this parametric function online:

http://math.stackexchange.com/questions/461547/whats-the-equation-of-helix-surface

1. How do I turn this into POV-Ray code?
2. Can I fill this shape with a gas that is denser in the middle of the 
tube and less dense at the tube's surface?


Mike

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