Quake III & the reciprocal square root

In the C source code of the famous game “Quake III — Arena” you can find an incredibly efficient piece of code that seems totally insane and incomprehensible! It is the code for computing the…

Do you know what is Fast inverse square root

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Quake 3 Fast Inverse Square Root｜TikTok Search

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Quake III & the reciprocal square root

Is Fast Inverse Square Root still Fast?