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headless.rs
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headless.rs
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//! This example only enables a minimal set of plugins required for bevy to run.
//! You can also completely remove rendering / windowing Plugin code from bevy
//! by making your import look like this in your Cargo.toml.
//!
//! ```toml
//! [dependencies]
//! bevy = { version = "*", default-features = false }
//! # replace "*" with the most recent version of bevy
//! ```
use bevy::{app::ScheduleRunnerPlugin, prelude::*, utils::Duration};
fn main() {
// This app runs once
App::new()
.add_plugins(MinimalPlugins.set(ScheduleRunnerPlugin::run_once()))
.add_systems(Update, hello_world_system)
.run();
// This app loops forever at 60 fps
App::new()
.add_plugins(
MinimalPlugins.set(ScheduleRunnerPlugin::run_loop(Duration::from_secs_f64(
1.0 / 60.0,
))),
)
.add_systems(Update, counter)
.run();
}
fn hello_world_system() {
println!("hello world");
}
fn counter(mut state: Local<CounterState>) {
if state.count % 60 == 0 {
println!("{}", state.count);
}
state.count += 1;
}
#[derive(Default)]
struct CounterState {
count: u32,
}