Wolfenstein 3D's map renderer
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Wolfenstein 3D was a triumph of early 90s engineering. It was an action packed 3d first person shooter - arguably the first - and it ran well on a 12 MHz 286 PC.
How on earth was such a feat pulled off? Find out by watching this in-depth analysis of how the map renderer worked.
The Wolfenstein 3D source is available at: https://github.com/id-Software/wolf3dChannel: Matt Godbolt