Non Circular Gears

Non circular gears - (superellipse, ellipse, circular)

First attempt on some heavy functional programming in openSCAD
It's not quick but it gets the job done.
A C# program will calculate in 10 - 100ms with 16000 iterations
Here iterations are limited by recursion max, and at best it takes 40 sec to calculate, more often longer up to 8 min seen.
The number of iterations could be lowered, but the best results
come with high numbers, so I left it high at 5000
With numbers higher than 5000 I begin to get recurse error
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Only enable one drawPolarGearSet as each can take more minuts to calculate, and lock openScad until done.
If you get recurse errors - try
Edit->Prefrerences
Advanced tap
set "Turn off rendering" to 4000000 it works on my setup
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More info about Non circular gears can be found in my article at
codeproject - sear