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Revisiting the Fast Inverse Square Root – Is It Still Useful?
In 2005, id Software released the source code for their 1999 game Quake III Arena under the GPL-2 license. In the file code/game/q_math.c , there is a function for calculating the reciprocal square root of a number which at first glance seems to use a very peculiar algorithm:
- Points
- 145
- HN comments
- 51
- Submissions
- 1
- Cited by
- 0 commenters
Software EngineeringMath & Algorithms2023
On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| Apr 20, 2023 | Revisiting the Fast Inverse Square Root – Is It Still Useful? by nhellman | 145 | 51 |
