https://orutez.github.io/FootPrint/Algorithm/Fast-Inverse-Square-Root-(WTF-Function) #3
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anyone here in 2025? 👀 |
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https://orutez.github.io/FootPrint/Algorithm/Fast-Inverse-Square-Root-(WTF-Function)
float Q_rsqrt( float number ) { long i; float x2, y; const float threehalfs = 1.5F; x2 = number * 0.5F; y = number; i = * ( long * ) &y; // evil floating point bit level hacking i = 0x5f3759df - ( i >> 1 ); // what the fuck? y = * ( float * ) &i; y = y * ( threehalfs - ( x2 * y * y ) )...
https://orutez.github.io/FootPrint/Algorithm/Fast-Inverse-Square-Root-(WTF-Function)
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