This is exactly what I was looking for. I was able to modify $circle{ $y }{ $x }++; to read $circle{ $y }{ $x } += int sqrt(($x - $center_x) ** 2 + ($y - $center_y) ** 2);. That color-codes the center going out (and would go to the edge of the circle, if I had enough CSS classes).

My use of %curpass earlier was to ensure that any pixel in the original circle didn't get ++'d twice for the same circle entry.

In reply to Re^4: Creating a circle in a data structure by AK108
in thread Creating a circle in a data structure by AK108

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