And with that... I believe we have correctness

Animations are still a bit janky but the core gameplay loop seem secure!

src/display3d.rs

@@ -91,7 +91,8 @@ impl Plugin for Display3dPlugin {
                 pick_up.run_if(any_component_added::<game::Selected>()),
                 put_down.run_if(any_component_removed::<game::Selected>()),
                 dissolve_animation.run_if(any_with_component::<Dissolving>),
-                capture_piece.run_if(any_with_component::<game::BeingCaptured>),
+                capture_piece_start.run_if(any_component_added::<game::BeingCaptured>()),
+                capture_piece_end.run_if(any_component_removed::<Dissolving>()),
                 monitor_animations
                     .run_if(in_state(GameState::Play))
                     .run_if(any_component_changed::<AnimationPlayer>()),
@@ -1160,93 +1161,38 @@ fn setup_dissolve_materials(
 
 /// When a piece is captured...
 /// 1. Play a cool "captured" animation and a neat sound
-/// 2. Move the piece to the side of the board
-/// 3. Play the same "captured" animation in reverse
-/// The animation is like a 'beam me up scotty' sorta thing.
-fn capture_piece(
-    events: Query<(Entity, &Dissolvable), (With<Display3d>, Added<game::BeingCaptured>)>,
-    mut query: Query<
-        (&mut Transform, &Side, &Dissolvable),
-        (With<Display3d>, With<game::BeingCaptured>),
-    >,
-    dissolving: Query<Entity, With<Dissolving>>,
-    mut state: Local<Option<game::CaptureFlow>>,
+fn capture_piece_start(
+    events: Query<(Entity, &Dissolvable), Added<game::BeingCaptured>>,
     mut commands: Commands,
-    score: Res<game::Score>,
-    mut timer: Local<f32>,
-    time: Res<Time>,
 ) {
-    debug!("Running capture piece routine");
-    match *state {
-        // State is None, so we need to initiate the animation
-        None => {
-            *state = events.iter().next().map(|(entity, dissolvable)| {
-                // Insert the "Dissolving::Out" tag on the entity we want to fade out
+    events.iter().for_each(|(entity, dissolvable)| {
         commands
             .entity(entity)
             .insert(Dissolving::Out(dissolvable.duration));
-
-                // Set the next state to start fading out
-                game::CaptureFlow::FadeOut(entity)
     });
 }
-        Some(s) => {
-            match s {
-                game::CaptureFlow::FadeOut(_entity) => {
-                    // Wait for fade-out animation
-                    // If all pieces are done dissolving
-                    if dissolving.is_empty() && *timer >= 3.0 {
-                        debug!("Nothing dissolving, moving on to next step!");
-                        // reset the timer
-                        *timer = 0.0;
-
-                        // Move to next state now that animation is done
-                        *state = s.next();
-                        // This takes effect after updating all children
-                    } else {
-                        *timer += time.delta_seconds();
-                    }
-                }
-                game::CaptureFlow::Store(entity) => {
-                    let (mut t, side, dissolvable) = query
-                        .get_mut(entity)
-                        .expect("Visibility and Transform of captured piece");
-
-                    // HACK: This is dirty. Why side, but score.captures(!side)?
-                    debug!(
-                        "Capture translation: ({:?}, {:?}) {:?}",
-                        side,
-                        score.captures(!*side).saturating_sub(1),
-                        t.translation
-                    );
-                    debug!("Setting translation for captured piece {:?}", entity);
-                    t.translation =
-                        capture_translation(side, score.captures(!*side).saturating_sub(1));
-
-                    commands
-                        .entity(entity)
-                        .insert(Dissolving::In(dissolvable.duration));
 
-                    *state = s.next();
-                }
-                game::CaptureFlow::FadeIn(entity) => {
-                    // If we have completed the dissolve-in animation
-                    if dissolving.is_empty() {
-                        debug!("Nothing dissolving, moving on to next step!");
+/// Once done fading out:
+/// 1. Move piece to side of board
+/// 2. Remove BeingCaptured component
+/// 3. Add Captured marker
+fn capture_piece_end(
+    mut events: RemovedComponents<Dissolving>,
+    mut query: Query<(Entity, &Dissolvable, &Side, &mut Transform), With<BeingCaptured>>,
+    mut commands: Commands,
+    score: Res<game::Score>,
+) {
+    events.read().for_each(|e| {
+        if let Ok((entity, dissolvable, side, mut transform)) = query.get_mut(e) {
+            transform.translation = capture_translation(side, score.captures(!*side));
 
-                        // Update the 'BeingCaptured' -> 'Captured' status
             commands
                 .entity(entity)
-                            .insert(Captured)
-                            .remove::<BeingCaptured>();
-
-                        // Move to next state now that animation is done
-                        *state = s.next();
-                    }
-                }
-            }
-        }
+                .insert(Dissolving::In(dissolvable.duration))
+                .remove::<BeingCaptured>()
+                .insert(Captured);
         }
+    });
 }
 
 fn debug_selected(

src/game.rs

@@ -247,29 +247,6 @@ pub(crate) struct Move {
     pub move_type: MoveType,
 }
 
-/// Enum for the Capture event flow
-#[derive(Debug, Clone, Copy, Resource)]
-pub(crate) enum CaptureFlow {
-    // Run the "fade out" animation
-    FadeOut(Entity),
-    // Put the captured piece next to the board
-    Store(Entity),
-    // Run the "fade in" animation
-    FadeIn(Entity),
-}
-
-impl CaptureFlow {
-    /// The capture flow so we can move from one "capture flow state" to the next
-    /// Fade out, then store, then fade in
-    pub(crate) fn next(&self) -> Option<Self> {
-        match self {
-            Self::FadeOut(e) => Some(Self::Store(*e)),
-            Self::Store(e) => Some(Self::FadeIn(*e)),
-            Self::FadeIn(_) => None,
-        }
-    }
-}
-
 #[derive(Debug, Component, PartialEq, Clone, Default, Copy, Eq, Hash)]
 pub(crate) struct BoardIndex {
     pub x: usize,