The Fast Inverse Square Root function from Quake III: i = 0x5f3759df - ( i >> 1 ); // what the fuck? https://en.wikipedia.org/wiki/Fast_inv

The Fast Inverse Square Root function from Quake III: i = 0x5f3759df - ( i >> 1 ); // what the fuck? https://en.wikipedia.org/wiki/Fast_inverse_square_root https://en.wikipedia.org/wiki/Fast_inverse_square_root