Add fade out tween to smoke

Author: benfrankel

Cargo.lock

@@ -43,6 +43,7 @@ bevy_mod_picking = { version = "0.20", default-features = false, features = [
     "backend_bevy_ui",
 ] }
 bevy_state = "0.14"
+bevy_tweening = "0.11"
 interpolation = "0.3"
 iyes_progress = "0.12"
 lazy-regex = { version = "3", features = ["lite"] }

Cargo.toml

@@ -3,7 +3,10 @@ pub mod offset;
 pub mod transition;
 
 use bevy::prelude::*;
+use bevy_tweening::TweeningPlugin;
 
 pub(super) fn plugin(app: &mut App) {
+    app.add_plugins(TweeningPlugin);
+
     app.add_plugins((backup::plugin, offset::plugin, transition::plugin));
 }

src/animation.rs

@@ -28,8 +28,9 @@ fn record_movement_action(
     mut action_query: Query<(&ActionState<MovementAction>, &mut MovementController)>,
 ) {
     for (action, mut controller) in &mut action_query {
-        let input = cq!(action.axis_pair(&MovementAction::Move));
-        controller.0 = input.xy().clamp_length_max(1.0);
+        controller.0 += cq!(action.axis_pair(&MovementAction::Move))
+            .xy()
+            .clamp_length_max(1.0);
     }
 }
 

src/game/actor/movement/input.rs

@@ -1,6 +1,9 @@
+use std::time::Duration;
+
 use avian2d::prelude::*;
 use bevy::ecs::system::EntityCommand;
 use bevy::prelude::*;
+use bevy_tweening::*;
 
 use crate::core::UpdateSet;
 use crate::game::actor::movement::MovementController;
@@ -33,6 +36,8 @@ fn spawn_movement_smoke(
     }
 }
 
+const LIFETIME_SECS: f32 = 0.5;
+
 fn smoke(movement: Vec2) -> impl EntityCommand<World> {
     move |mut entity: EntityWorldMut| {
         let parent = entity.world().resource::<GameRoot>().vfx;
@@ -71,9 +76,17 @@ fn smoke(movement: Vec2) -> impl EntityCommand<World> {
                     texture,
                     ..default()
                 },
+                Animator::new(Tween::new(
+                    EaseMethod::Linear,
+                    Duration::from_secs_f32(LIFETIME_SECS),
+                    lens::SpriteColorLens {
+                        start: Color::WHITE,
+                        end: Color::NONE,
+                    },
+                )),
                 RigidBody::Kinematic,
                 LinearVelocity(-12.0 * movement),
-                DespawnOnTimer(Timer::from_seconds(0.2, TimerMode::Once)),
+                DespawnOnTimer(Timer::from_seconds(LIFETIME_SECS, TimerMode::Once)),
             ))
             .set_parent(parent);
     }