Support Warning
WebGPU is currently only supported on Chrome starting with version 113, and only on desktop. If they don't work on
your configuration, you can check the WebGL2 examples
here.
logs.rs:
use bevy::log::once;
use bevy::prelude::*;
fn main() {
App::new()
.add_plugins(DefaultPlugins.set(bevy::log::LogPlugin {
..default()
}))
.add_systems(Startup, setup)
.add_systems(Update, log_system)
.add_systems(Update, log_once_system)
.add_systems(Update, panic_on_p)
.run();
}
fn setup(mut commands: Commands) {
commands.spawn(Camera2dBundle::default());
commands.spawn(TextBundle {
text: Text::from_section("Press P to panic", TextStyle::default()),
style: Style {
position_type: PositionType::Absolute,
top: Val::Px(12.0),
left: Val::Px(12.0),
..default()
},
..default()
});
}
fn panic_on_p(keys: Res<ButtonInput<KeyCode>>) {
if keys.just_pressed(KeyCode::KeyP) {
panic!("P pressed, panicking");
}
}
fn log_system() {
trace!("very noisy");
debug!("helpful for debugging");
info!("helpful information that is worth printing by default");
warn!("something bad happened that isn't a failure, but thats worth calling out");
error!("something failed");
}
fn log_once_system() {
trace_once!("one time noisy message");
debug_once!("one time debug message");
info_once!("some info which is printed only once");
warn_once!("some warning we wish to call out only once");
error_once!("some error we wish to report only once");
for i in 0..10 {
info_once!("logs once per call site, so this works just fine: {}", i);
}
once!({
info!("doing expensive things");
let mut a: u64 = 0;
for i in 0..100000000 {
a += i;
}
info!("result of some expensive one time calculation: {}", a);
});
}