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