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id Releases Open Source Wolfenstein 3D for the iPhone
An anonymous reader writes "id Software has released a port of the classic Wolfenstein FPS to the iPhone. Some of the coding was done by John Carmack himself, who also used original code combined with new code from Wolf3D Redux. The original code was open sourced years ago, and enthusiasts have been updating it, which made the port considerably easier for id. It's available in the iTunes App Store, but the source is available for free at id's website."
Carmack also posted a detailed writeup about the decision to bring Wolf3D to the iPhone, including design notes and a few snippets of code. At the end, he says, "I'm going back to Rage for a while, but I do expect Classic Doom to come fairly soon for the iPhone." Kotaku got a chance to try the game at GDC: "It's not just a good reproduction of the original, it seems better."
Wolfenstein doesn't contain the BFG... you're thinking of Doom.
You can't take the sky from me.
The only acceptable scaling method for pixel art is unfiltered "nearest neighbor" scaling, as used in the original game.
There exist algorithms for enlarging pixel art that overcome both the blocky appearance of nearest-neighbor resampling and the blurry appearance of linear resampling. The Scale2x algorithm, for instance, can be applied multiple times. The hq2x, hq3x, and hq4x can be applied only as the final step, but with amazing results.