Interactive Raycaster For the Commodore 64 Under 256 Bytes
Found on Slashdot on Wednesday, 15 May 2013
1bir (1 Block Interactive Raycaster) is a simple ray casting engine implemented only in 254 bytes to run on a stock, unexpanded Commodore 64.
The source code in 6502 assembly is available, with extensive comments. A YouTube video showcases 1bir in a detailed manner with both kind of maps and more information, while a Vimeo video presents a shorter demonstration.
I wish other programmers would learn from this one. Then we would not be flooded with needlessly large software. It's true that diskspace has gotten cheap over the years, but that does not mean one should waste it. Just imagine the average OS install, ready to use, would take up around 100MB only.