The fast inverse square root algorithm was known from the 80’s, and was used in at least one game I’m aware of before Quake 3. Also, it wasn’t important in the long run - the same year Quake 3 was released, the rsqrtss instruction was introduced by Intel, which made this algorithm obsolete (as it was faster and more accurate).
The fast inverse square root algorithm was known from the 80’s, and was used in at least one game I’m aware of before Quake 3. Also, it wasn’t important in the long run - the same year Quake 3 was released, the rsqrtss instruction was introduced by Intel, which made this algorithm obsolete (as it was faster and more accurate).
It is really cool though.