The goal of this crate is to offer an easy way for bevy games to load all their assets in a loading State.
bevy_asset_loader introduces the derivable trait [AssetCollection]. Structs with asset handles
can be automatically loaded during a configurable loading State. Afterwards they will be inserted as
resources containing loaded handles and the plugin will switch to a second configurable State.
# use bevy_asset_loader::{AssetLoader, AssetCollection};
# use bevy::prelude::*;
# use bevy::asset::AssetPlugin;
fn main() {
let mut app = App::new();
app
# /*
.add_plugins(DefaultPlugins)
# */
# .add_plugins(MinimalPlugins)
# .add_plugin(AssetPlugin::default());
AssetLoader::new(GameState::Loading)
.continue_to_state(GameState::Next)
.with_collection::<AudioAssets>()
.with_collection::<ImageAssets>()
.build(&mut app);
app
.add_state(GameState::Loading)
.add_system_set(SystemSet::on_update(GameState::Next)
.with_system(use_asset_handles.system())
)
# .set_runner(|mut app| app.schedule.run(&mut app.world))
.run();
}
#[derive(AssetCollection)]
struct AudioAssets {
#[asset(path = "audio/background.ogg")]
background: Handle<AudioSource>,
#[asset(path = "audio/plop.ogg")]
plop: Handle<AudioSource>
}
#[derive(AssetCollection)]
pub struct ImageAssets {
#[asset(path = "images/player.png")]
pub player: Handle<Image>,
#[asset(path = "images/tree.png")]
pub tree: Handle<Image>,
}
// since this function runs in MyState::Next, we know our assets are
// loaded and their handles are in the resource AudioAssets
fn use_asset_handles(audio_assets: Res<AudioAssets>, audio: Res<Audio>) {
audio.play(audio_assets.background.clone());
}
#[derive(Clone, Eq, PartialEq, Debug, Hash)]
enum GameState {
Loading,
Next
}