Cool Code - Quake 3 Fast InvSqrt() - Particl Digital

Ever play Quake while growing up? Aside from the game itself, the code written to build it is home to a small piece of history in being able to get around the very expensive inverse square root function using very accurate, very fast approximation. The code, specifically how the mythical constant(0x5f3759df) was derived is still…

FAST INVERSE SQUARE ROOT - PDF Free Download

Fast reciprocal square root algorithm

REVEALED: Quake III's SECRET Algorithm!

Exploring Quake 3's Fast Inverse Square Root

Found this in Doom's code. : r/ProgrammerHumor

history - Where did Fast InvSqrt() come from? - Retrocomputing Stack Exchange

Quake III's or Fast InvSqrt() or 0x5F3759DF Algorithm, by whoisslimshady

Game Dev Digest Issue #108 - Work Smarter, Not Harder

PDF) SIMPLE EFFECTIVE FAST INVERSE SQUARE ROOT ALGORITHM WITH TWO MAGIC CONSTANTS

Computation, Free Full-Text

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