this post was submitted on 13 Oct 2024
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I have a vague memory of a 3D engine from the 1990s using an approach like this, but I'm not entirely sure.
I think you're thinking of the famous fast inverse square root algorithm from Quake.
With respect to the top comment, the only reason 3d graphics are possible (even at 850W of power consumption) is due to taking a bunch of shortcuts and approximations like culling of polygons. If its a reasonable shortcut it either has or will be taken.