This is an interactive canvas demo inspired by an old demo in GFA BASIC on Atari ST. It computes any text projection onto a sphere.
(maybe it would be great to write a gfa2js library?...)

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Original code from the book "Graphisme en GFA Basic, C et Assembleur", Micro Application, er...past century ;)
I can't remember how long it was to compute the sphere on a Atari ST, but no matter, it was cool.