fb9c5a6cbb
# Objective My attempt at implementing #7515 ## Solution Added struct `Pitch` and implemented on it `Source` trait. ## Changelog ### Added - File pitch.rs to bevy_audio crate - Struct `Pitch` and type aliases for `AudioSourceBundle<Pitch>` and `SpatialAudioSourceBundle<Pitch>` - New example showing how to use `PitchBundle` ### Changed - `AudioPlugin` now adds system for `Pitch` audio --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
56 lines
1.5 KiB
Rust
56 lines
1.5 KiB
Rust
//! This example illustrates how to play a single-frequency sound (aka a pitch)
|
|
|
|
use bevy::prelude::*;
|
|
use std::time::Duration;
|
|
|
|
fn main() {
|
|
App::new()
|
|
.add_plugins(DefaultPlugins)
|
|
.add_event::<PlayPitch>()
|
|
.add_systems(Startup, setup)
|
|
.add_systems(Update, (play_pitch, keyboard_input_system))
|
|
.run();
|
|
}
|
|
|
|
#[derive(Event, Default)]
|
|
struct PlayPitch;
|
|
|
|
#[derive(Resource)]
|
|
struct PitchFrequency(f32);
|
|
|
|
fn setup(mut commands: Commands) {
|
|
commands.insert_resource(PitchFrequency(220.0));
|
|
}
|
|
|
|
fn play_pitch(
|
|
mut pitch_assets: ResMut<Assets<Pitch>>,
|
|
frequency: Res<PitchFrequency>,
|
|
mut events: EventReader<PlayPitch>,
|
|
mut commands: Commands,
|
|
) {
|
|
for _ in events.iter() {
|
|
info!("playing pitch with frequency: {}", frequency.0);
|
|
commands.spawn(PitchBundle {
|
|
source: pitch_assets.add(Pitch::new(frequency.0, Duration::new(1, 0))),
|
|
settings: PlaybackSettings::DESPAWN,
|
|
});
|
|
info!("number of pitch assets: {}", pitch_assets.len());
|
|
}
|
|
}
|
|
|
|
fn keyboard_input_system(
|
|
keyboard_input: Res<Input<KeyCode>>,
|
|
mut frequency: ResMut<PitchFrequency>,
|
|
mut events: EventWriter<PlayPitch>,
|
|
) {
|
|
if keyboard_input.just_pressed(KeyCode::Up) {
|
|
frequency.0 *= 2.0f32.powf(1.0 / 12.0);
|
|
}
|
|
if keyboard_input.just_pressed(KeyCode::Down) {
|
|
frequency.0 /= 2.0f32.powf(1.0 / 12.0);
|
|
}
|
|
if keyboard_input.just_pressed(KeyCode::Space) {
|
|
events.send(PlayPitch);
|
|
}
|
|
}
|