RustyWorld

Rust implementation of Another World (aka Out of this world) game engine.

I wanted a fun project to challenge myself while learning Rust, and what better than Eric Chahi's masterpiece on its 30th anniversary?

I started from Fabien Sanglard's articles and implementation, based in turn on Gregory Montoir's original work.

I hadn't had so much fun programming in years! Thoroughly recommend trying yourself.

How to run

Right now it is pretty barebones:

• copy the original data folder in $PWD/data
• cargo run

Highlights

• mostly complete, main missing feature is load / save
• tries to provide a cleaner model for the VM, which is compatible with the source material but often more generic
  • clearly separates instruction decoding from execution
  • opcode arguments and flags are parsed early, simplifying downstream logic
  • groups several opcodes together, with the instruction decoding stage providing compatibility with original resources
    • conditional and unconditional jumps are a single opcode
    • mov/movc, add/addc, etc are grouped together, with immediate and register variants for arguments
  • threads have an unbound stack
  • redundant vm state has been removed (e.g. requested_state, requested_pc)
  • uses one byte per pixel in video pages
• uses minifb for video and input, and rodio for audio; should work cross-platform, but I only tested it on Linux right now
• still a work in progress

Next steps

• curious to try WASM...

Credits

• For making this: Eric Chahi
• For making this porting possible: Gregory Montoir
• For making this porting bearable :-p : Fabien Sanglard
• For making this so easy: All the amazing people working on Rust

See also

Other Another World engine implementations in rust:

• https://github.com/malandrin/another-world-suite
• https://github.com/Gnurou/awer