Just picked up a copy of _Optics_ by Bruno Rossi (1957) and as I was flipping
through it, the graph(s) of the Cornescu spiral caught my eye.

Took me a bit to find an appropriate algorithm for the Fresnel Integrals to port
to SDL, and how to graph them.

https://en.wikipedia.org/wiki/Euler_spiral

I could probably spend a bit more time getting a better formula for the pigment
as a function of arc-length . . .

(C'mon Povvers - make and post more cool stuff!)

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