Yet more spirographs ➿

Hypotrochoids based on formulas in en.wikipedia.org/wiki/hypotrochoid I got to when Google threw this image at me: pinterest.com/pin/pa…-363525001150121862/

Var a, b and c can be set using the _num(erator) / _den(ominator) sliders.

In that image:
[1,7/13,1/13] Yet more spirographs ➿ (variation)
[1,7/13,5/13] Yet more spirographs ➿ (variation)
[1,7/13,7/13] Yet more spirographs ➿ (variation)
[1,7/13,15/13] Yet more spirographs ➿ (variation)

[1,7/5,1/13] Yet more spirographs ➿ (variation)
[1,7/5,5/13] Yet more spirographs ➿ (variation)
[1,7/5,7/13] Yet more spirographs ➿ (variation)
[1,7/5,15/13] Yet more spirographs ➿ (variation)

(When a drawing seems not to have smooth curves increase stepsPerT)

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showRecipe
1.00
x
y
a_num
11.0
a_den
2.00
b_num
5.00
b_den
3.00
c_num
5.00
c_den
2.00
stepsPerT
1000
const showRecipe = 1; //min=0 max=2 step=1 (No, Yes, Yes including parametric equation)
const x = '(a-b)*Math.cos(t*2*Math.PI)+c*Math.cos(t*2*Math.PI*(a-b)/b)'; //type=string
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