I developed this trick independently while working at MetaCreations in the late 1990's. I wrote it up in an article in 2001. I doubt this is where the Quake guy

I developed this trick independently while working at MetaCreations in the late 1990's. I wrote it up in an article in 2001. I doubt this is where the Quake guys got it, because the magic number is slightly different, but it's the same basic idea. http://stereopsis.com/computermath101/ http://stereopsis.com/computermath101/ -Ben