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The Art of Programming
23 Jan 2021, 20:16
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Quake III's legendary fast inverse square root for dummies
https://www.youtube.com/watch?v=p8u_k2LIZyo
Fast Inverse Square Root — A Quake III Algorithm
In this video we will take an in depth look at the fast inverse square root and see where the mysterious number 0x5f3759df comes from. This algorithm became famous after id Software open sourced the engine for Quake III. On the way we will also learn about floating point numbers and newton's method....
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