this post was submitted on 13 Aug 2024
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I remember my brother telling me about Wolfenstein 3D. I insisted that something like that, that moved smoothly at your command in any direction instead of in clunky 90° turns and blockwise steps, was impossible with the current technology.
I was wrong.
you were right, the computers couldnt do the math in time. the trick was to precalculate the sin/cos tables for angle steps into tons of lookups instead.
It wasn’t just the trig tables, but realtime raycasting altogether felt like sorcery.