You can omit the square root if you compare to the square of the radius. I think one will get a big speed improvement from this.
s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

In reply to Re^2: Creating a circle in a data structure by Skeeve
in thread Creating a circle in a data structure by AK108

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