Drawing a line on a parametric surface.

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Variations: Sphere, Torus, Sine Surface, Heart, Klein Bottle, Cross Cap, Moebius Tube.

There is randomness in the colour palette created and in the frequencies in the functions which generate the surface paths to ensure variation.

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Click and drag to rotate.
Scroll to zoom in and out.
<Space> to toggle rotation.
<r> to reset.

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Made in plain JavaScript rendered to a HTML canvas.

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By Josh Murr, Jan 2022