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…

Exploring Quake 3's Fast Inverse Square Root

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

Fast inverse square root - Wikipedia

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

Death of Quake 3's Inverse Square Root Hack, by Doug Foo

REVEALED: Quake III's SECRET Algorithm!

Fast inverse square root - Wikipedia

PDF) A Modification of the Fast Inverse Square Root Algorithm

The Legendary Fast Inverse Square Root, by Shaw, Hard Mode

Exploring Quake 3's Fast Inverse Square Root

PDF) Improving the Accuracy of the Fast Inverse Square Root by Modifying Newton–Raphson Corrections

FAST INVERSE SQUARE ROOT - PDF Free Download

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

Fast Inverse Square Root – An ingenius Quake III Algorithm - Nikhil Kunche