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…

Quake 3 Source Code Review: Architecture

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

Computation, Free Full-Text

TIL Quake III Arena, needing to calculate x^(-1/2) quickly, used a piece of code so strange, the developers commented the code with evil floating point bit level hacking and what the fuck?

Quake Iii Arena: Most Up-to-Date Encyclopedia, News & Reviews

Fast reciprocal square root algorithm

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

Fast Inverse Square Root, 978-620-0-80095-4, 6200800952 ,9786200800954

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

PDF) A Modification of the Fast Inverse Square Root Algorithm

GitHub - kvn13github/0x5F3759DF-in-Python3-FastInverseSquareRoot: The magic number 0x5F3759DF in Python3 Fast Inverse SquareRoot

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