Over the years, DOOM has been ported to many things; think of any arbitrary device and chances are it can run the classic shooter. But what about something more esoteric like [Artem]’s DOOM in a TrueType font?
Okay, it’s not technically a port of DOOM, but it’s still very cool. TrueType actually has a bytecode used for hints to the render and, while not made for this, it’s just complete enough for this demo to run. Either to increase the over-engineering, or just to make it all a bit easier, [Artem] makes a simple DSL and a matching compiler written in Python.
All of this allows the byte code intended to implement serifs run arbitrary code, in this case, ray casting the walls for a DOOM demo. The final bytecode is 6,580 in size and, assuming your font renderer implements this, is very playable.
While this project’s implementation of the game is a bit abstract, the version of DOOM that you can run over DNS is the real deal.
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Link to some actual code and documentation: https://github.com/4rh1t3ct0r7/ttf-doom/
Article is wrong on how much is done in the font, only the bars are managed from the font:
It’s still insane and extremely impressive. Just wished HaD had slightly more quality on their articles.
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Fontemon was faster. https://www.coderelay.io/fontemon.html
Reminds me also of that Z80 disassembler in a font: https://github.com/nevesnunes/z80-sans