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Doom engine 1993 code review

from Fabien Sanglard [alt+shift+b] in technology

Before studying the iPhone version, it was important for me to understand how Doom engine WAS performing rendition back in 1993. After all the OpenGL port must reuse the same data from the WAD archive. Here are my notes about Doom 1993 renderer, maybe it will help someone to dive in.
13th Jan 2010
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