Entries Tagged ‘id software’:

How-to Build Doom 3 Source Code on OS X

filed in Mac OS X, Programming on Nov.25, 2011

The Doom 3 source code has recently been released under the GPL license by iD Software and it appears that someone has been able to successfully build it under OS X! There is also a small/partial code review of sorts here too with plans for a complete code review in the future. Check out the [...]

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Understanding Fast Inverse Square Root (as used in the game Quake)

filed in Algorithms, Gaming, PC on Jun.28, 2011

“An article and research paper describe a fast, seemingly magical way to compute the inverse square root (1/sqrt(x)), used in the game Quake. I’m no graphics expert, but appreciate why square roots are useful. The Pythagorean theorem computes distance between points, and dividing by distance helps normalize vectors. (Normalizing is often just a fancy term [...]

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