godot-rust v0.3 brings type-safe signals to the table.
If you register a signal:
#[signal]
fn damage_taken(amount: i32);
you can now freely connect it with other Rust functions:
fn ready(&mut self) {
// Connect signal to the method:
self.signals().damage_taken().connect(Self::on_damage_taken);
// Or to an ad-hoc closure:
self.signals().damage_taken().connect(|amount| {
println!("Damage taken: {}", amount);
});
// Or to a method of another object:
let stats: Gd<Stats>;
self.signals().damage_taken().connect_other(&stats, |stats, amount| {
stats.update_total_damage(amount);
});
}
Emitting is also type-safe:
self.signals().damage_taken().emit(42);
Furthermore, you can now await signals, effectively introducing async tasks:
godot::task::spawn(async move {
godot_print!("Wait for damage to occur...");
let (dmg,) = player.signals().damage_taken().to_future().await;
godot_print!("Player took {dmg} damage.");
});
There are many other improvements, see devlog and feel free to ask me anything :)
Huge thanks to all the contributors who helped ship these features!
~this was originally posted by @bromeon@mastodon.gamedev.place the project author on reddit. I'm just maintaining some parts of the project.~