[OpenSCAD] module [maybe later function] spiral(rev, hfac, wfac, base_r, sp_r)

NateTG nate-openscadforum at pedantic.org
Sat Sep 8 22:05:52 EDT 2018

If you want to do the angles in degrees instead, you can just replace 360
with 1.

Lines 42-46 and then 63-72 make the tapered windings.

It's possible to do fancier stuff to get something that looks better, but
I'm not sure what application you have in mind.

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