fix character animation loading and flickering

src/character.rs

@@ -12,6 +12,9 @@ pub struct ProjectileOrigin;
 #[derive(Component, Debug)]
 pub struct AnimatedCharacter(pub usize);
 
+#[derive(Component, Debug)]
+struct AnimatedCharacterAsset(pub Handle<Gltf>);
+
 #[derive(SystemParam)]
 pub struct CharacterHierarchy<'w, 's> {
     descendants: Query<'w, 's, &'static Children>,
@@ -49,12 +52,12 @@ pub fn plugin(app: &mut App) {
 
 fn spawn(
     mut commands: Commands,
-    mut query: Query<(Entity, &AnimatedCharacter), Added<AnimatedCharacter>>,
+    query: Query<(Entity, &AnimatedCharacter), Added<AnimatedCharacter>>,
     gltf_assets: Res<Assets<Gltf>>,
     assets: Res<GameAssets>,
     heads_db: Res<HeadsDatabase>,
 ) {
-    for (entity, character) in &mut query {
+    for (entity, character) in query.iter() {
         let key = heads_db.head_key(character.0);
 
         let handle = assets
@@ -72,6 +75,7 @@ fn spawn(
             .insert((
                 Transform::from_translation(Vec3::new(0., -1.45, 0.)).with_scale(Vec3::splat(1.2)),
                 SceneRoot(asset.scenes[0].clone()),
+                AnimatedCharacterAsset(handle.clone()),
             ))
             .observe(find_marker_bones);
     }
@@ -123,21 +127,20 @@ fn setup_once_loaded(
     mut commands: Commands,
     mut query: Query<(Entity, &mut AnimationPlayer), Added<AnimationPlayer>>,
     parent: Query<&ChildOf>,
-    animated_character: Query<&AnimatedCharacter>,
-    assets: Res<GameAssets>,
+    animated_character: Query<(&AnimatedCharacter, &AnimatedCharacterAsset)>,
+
     gltf_assets: Res<Assets<Gltf>>,
     mut graphs: ResMut<Assets<AnimationGraph>>,
 ) {
     for (entity, mut player) in &mut query {
-        let Some(_animated_character) = parent
+        let Some((_character, asset)) = parent
             .iter_ancestors(entity)
             .find_map(|ancestor| animated_character.get(ancestor).ok())
         else {
             continue;
         };
 
-        let (_, handle) = assets.characters.iter().next().unwrap();
-        let asset = gltf_assets.get(handle).unwrap();
+        let asset = gltf_assets.get(asset.0.id()).unwrap();
 
         let animations = asset
             .named_animations