68d419d40f
Repeating timers will reset themselves upon finishing, carrying over any excess time during the last tick. This fixes timer drift upon resetting.
48 lines
1.5 KiB
Rust
48 lines
1.5 KiB
Rust
use bevy::prelude::*;
|
|
use std::time::Duration;
|
|
|
|
/// Plugins are the foundation of Bevy. They are scoped sets of components, resources, and systems
|
|
/// that provide a specific piece of functionality (generally the smaller the scope, the better).
|
|
/// This example illustrates how to create a simple plugin that prints out a message.
|
|
fn main() {
|
|
App::build()
|
|
.add_default_plugins()
|
|
// plugins are registered as part of the "app building" process
|
|
.add_plugin(PrintMessagePlugin {
|
|
wait_duration: Duration::from_secs(1),
|
|
message: "This is an example plugin".to_string(),
|
|
})
|
|
.run();
|
|
}
|
|
|
|
// This "print message plugin" prints a `message` every `wait_duration`
|
|
pub struct PrintMessagePlugin {
|
|
// Put your plugin configuration here
|
|
wait_duration: Duration,
|
|
message: String,
|
|
}
|
|
|
|
impl Plugin for PrintMessagePlugin {
|
|
// this is where we set up our plugin
|
|
fn build(&self, app: &mut AppBuilder) {
|
|
let state = PrintMessageState {
|
|
message: self.message.clone(),
|
|
timer: Timer::new(self.wait_duration, true),
|
|
};
|
|
app.add_resource(state)
|
|
.add_system(print_message_system.system());
|
|
}
|
|
}
|
|
|
|
struct PrintMessageState {
|
|
message: String,
|
|
timer: Timer,
|
|
}
|
|
|
|
fn print_message_system(mut state: ResMut<PrintMessageState>, time: Res<Time>) {
|
|
state.timer.tick(time.delta_seconds);
|
|
if state.timer.finished {
|
|
println!("{}", state.message);
|
|
}
|
|
}
|