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jackhalford | karma 1024 | avg karma 6.21 · 2020-04-11 15:59:05

The same trick (approximating with a first order Taylor series), is also the basis of quake's famous fast inverse square root [1]. I love these methods because they always involve a "magic constant".

[1] https://en.m.wikipedia.org/wiki/Fast_inverse_square_root

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