Update event example

examples/demo/event.rs

@@ -19,11 +19,14 @@ struct EffectPos {
     boom: Vec3,
 }
 
+#[derive(Component)]
+struct Triangle;
+
 fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
     commands.spawn(Camera2dBundle::default());
 
-    let start_x = -200.;
-    let end_x = 200.;
+    let start_x = -300.;
+    let end_x = 300.;
 
     commands.insert_resource(EffectPos {
         trail: Vec3::new(start_x - 40., 0., 0.),
@@ -36,17 +39,19 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
 
     commands
         .spawn((
+            Triangle,
             SpriteBundle {
                 texture: asset_server.load("triangle_filled.png"),
                 ..Default::default()
             },
             SpanTweenerBundle::new(secs(2.)).with_repeat(Repeat::Infinitely),
         ))
         .with_children(|c| {
-            // &'static str is available as an even data but recommended to use
-            // dedicated custom type instead to leverage the rust type system.
+            // &'static str is available as an default event data but it's
+            // recommended to use dedicated custom type instead to leverage the
+            // rust type system.
             c.span_tweens()
-                .tween_event(TweenEventData::with_data("trail"))
+                .tween_event(TweenEventData::with_data("bump"))
                 .tween(
                     secs(1.),
                     EaseFunction::ExponentialIn,
@@ -61,10 +66,15 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
                         }),
                     ),
                 )
+                .backward(secs(0.2))
+                .tween_event_for(
+                    secs(0.2),
+                    TweenEventData::with_data("small_boom"),
+                )
                 .tween_event(TweenEventData::with_data("boom"))
                 .tween(
                     secs(1.),
-                    EaseFunction::ExponentialOut,
+                    EaseFunction::CircularOut,
                     (
                         ComponentTween::new(interpolate::Translation {
                             start: Vec3::new(end_x, 0., 0.),
@@ -86,10 +96,11 @@ fn effect_system(
     mut commands: Commands,
     asset_server: Res<AssetServer>,
     effect_pos: Res<EffectPos>,
+    q_triangle: Query<&Transform, With<Triangle>>,
     mut event: EventReader<TweenEvent<&'static str>>,
 ) {
     event.read().for_each(|event| match event.data {
-        "trail" => {
+        "bump" => {
             commands.spawn((
                 Effect,
                 SpriteBundle {
@@ -112,6 +123,28 @@ fn effect_system(
                 }),
             ));
         }
+        "small_boom" => {
+            commands.spawn((
+                Effect,
+                SpriteBundle {
+                    texture: asset_server.load("circle.png"),
+                    transform: Transform::from_translation(
+                        q_triangle.single().translation,
+                    ),
+                    ..Default::default()
+                },
+                SpanTweenerBundle::new(secs(0.1)).tween_here(),
+                EaseFunction::Linear,
+                ComponentTween::new(interpolate::Scale {
+                    start: Vec3::new(0.5, 0.5, 0.),
+                    end: Vec3::new(3., 3., 0.),
+                }),
+                ComponentTween::new(interpolate::SpriteColor {
+                    start: Color::WHITE.with_a(0.2),
+                    end: Color::WHITE.with_a(0.),
+                }),
+            ));
+        }
         "boom" => {
             commands.spawn((
                 Effect,
@@ -121,13 +154,13 @@ fn effect_system(
                     ..Default::default()
                 },
                 SpanTweenerBundle::new(secs(0.5)).tween_here(),
-                EaseFunction::ExponentialOut,
+                EaseFunction::QuadraticOut,
                 ComponentTween::new(interpolate::Scale {
                     start: Vec3::new(1., 1., 0.),
                     end: Vec3::new(15., 15., 0.),
                 }),
                 ComponentTween::new(interpolate::SpriteColor {
-                    start: Color::WHITE,
+                    start: Color::WHITE.with_a(0.5),
                     end: Color::WHITE.with_a(0.),
                 }),
             ));