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

Overview

RustyWorld

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

Intro video

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

See also

Other Another World engine implementations in rust:

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Owner
Francesco Degrassi
Francesco Degrassi
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