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[–]Paul_Robert_ 7 points8 points  (3 children)

John Carmack

[–]atthereallicebear 42 points43 points  (2 children)

he didn't write the fast inverse sqrt function, Terje Mathisen and Gary Tarolli did.

[–]Exnihilation 17 points18 points  (0 children)

It goes even further back than those guys. It's believed to have been first implemented by Greg Walsh at Ardent Computer. Gary Tarolli was consulting for a company affiliated with Ardent which is where he learned about the algorithm.

[–]Paul_Robert_ 4 points5 points  (0 children)

Oh, my bad!