An experimental, status effects-as-entities system for Bevy.
Update decaying speed auto plugin example to match.
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examples/immediate_stats/decaying_speed.rs
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examples/immediate_stats/decaying_speed.rs
···
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mode: EffectMode::Insert, // Block having multiple of effect stacked on a single target.
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lifetime: Some(Lifetime::from_seconds(2.0)), // The duration of the effect.
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bundle: DecayingSpeed {
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// Start with double move speed.
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start_speed_boost: Modifier {
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bonus: 20,
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bonus: 10,
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multiplier: 2.0,
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},
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},
···
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}
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}
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/// Updates the UI to match thw world state.
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fn update_ui(
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mut ui: Single<&mut Text>,
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target: Single<&MovementSpeed>,
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examples/immediate_stats/decaying_speed_auto_plugin.rs
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examples/immediate_stats/decaying_speed_auto_plugin.rs
···
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#[auto_component(plugin = DecayingSpeedPlugin)]
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struct MovementSpeed(Stat);
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/// Applies a 2x speed boost, which decreases throughout its duration.
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/// Applies a speed boost, which decreases throughout its duration.
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#[derive(Component, Default)]
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struct DecayingSpeed {
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start_speed_boost: Modifier,
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#[auto_system(plugin = DecayingSpeedPlugin, schedule = Startup)]
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fn init_scene(mut commands: Commands) {
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commands.spawn((Name::new("Target"), MovementSpeed(Stat::new(100))));
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commands.spawn(Text::default());
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commands.spawn(Camera2d);
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}
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/// When space is pressed, apply decaying speed to the target.
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return;
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}
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info!("Applying Effect");
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commands.entity(*target).with_effect(EffectBundle {
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mode: EffectMode::Insert, // Block having multiple of effect stacked on a single target.
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lifetime: Some(Lifetime::from_seconds(2.0)), // The duration of the effect.
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bundle: DecayingSpeed {
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// Start with double move speed.
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start_speed_boost: Modifier::from_multiplier(2.0),
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start_speed_boost: Modifier {
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bonus: 10,
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multiplier: 2.0,
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},
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},
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..default()
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});
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effect.start_speed_boost,
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lifetime.timer.fraction_remaining(),
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);
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}
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}
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info!("The target now has {} movement speed.", speed.0.total());
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/// Updates the UI to match thw world state.
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#[auto_system(plugin = DecayingSpeedPlugin, schedule = PostUpdate)]
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fn update_ui(
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mut ui: Single<&mut Text>,
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target: Single<&MovementSpeed>,
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effects: Query<(Entity, &Lifetime, &DecayingSpeed)>,
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) {
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ui.0 = "Press Space to apply decaying movement speed\n\n".to_string();
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ui.0 += &format!("Speed: {:.1} ({:.1})\n\n", target.0.total(), target.0);
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for (entity, lifetime, speed) in &effects {
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ui.0 += &format!(
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"{} - {:.1}s ({:.1})\n",
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entity,
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lifetime.timer.remaining_secs(),
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speed
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.start_speed_boost
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.scaled(lifetime.timer.fraction_remaining())
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);
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}
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}