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…

Behind the Performance of Quake 3 Engine: Fast Inverse Square Root

Quake III & the reciprocal square root

How Fast Inverse Square Root actually works - Preetham

Quake III's Fast Square Root - That One Game Dev

2. Now write the function to calculate the inverse

Fast Inverse Square Root: Most Up-to-Date Encyclopedia, News & Reviews

Has anyone ever had a eureka moment like the fast inverse square

Revisiting The Fast Inverse Square Root - Is It Still Useful

Behind the Performance of Quake 3 Engine: Fast Inverse Square Root

Computation, Free Full-Text

Fast Inverse Square Root — A Quake III Algorithm_哔哩哔哩_bilibili

Fast Inverse Square Root: Most Up-to-Date Encyclopedia, News & Reviews