This project is an example of how to use wasmtime as a modding system for games written in Rust. I use a wrapper around wasmtime made by DouglasDwyer.

• Event system
• Internal data
• Callbacks
• Graphics
• Player control example

• src - Game logic.
• wit - WIT API defenitions.
• mods - Crates with module logic compiled to WASM.
• crates - Some packages to simplify code.
  • mod_macros - A few macros to make mod creation easier.
  • mod_manager - Abstraction for interacting with WASM packages.
  • utils - Utils for development.
  • types - Type defs shared between mods and game.

Build occurs in two stages: main executable and mods. Mods are built through the build.rs file which runs build scripts inside mod directories and copies binaries into the wasm folder next to the executable.

NOTE: The build scripts are in bash format. Support for windows is planned in the future

Make sure you have rust, cargo, and wasm-tools installed on your machine.

Install wasm32-unknown-unknown build target with:

rustup target add wasm32-unknown-unknown

Run with:

RUST_LOG=info cargo run