Add animation baking system

src/fighter/animation.rs

@@ -15,6 +15,37 @@ impl FighterAnimationPlayerLink {
     }
 }
 
+/// The simulation-owned animation clock. Rendering may interpolate freely, but
+/// gameplay samples baked data only with this rollback-tracked value.
+#[derive(Component, Clone, Copy, Debug, Hash, PartialEq, Eq)]
+pub struct FighterAnimationFrame {
+    pub kind: AnimKind,
+    pub frame: u32,
+    pub repeat: bool,
+}
+
+impl FighterAnimationFrame {
+    pub const fn new(kind: AnimKind, repeat: bool) -> Self {
+        Self { kind, frame: 0, repeat }
+    }
+
+    pub fn reset(&mut self, kind: AnimKind, repeat: bool) {
+        self.kind = kind;
+        self.frame = 0;
+        self.repeat = repeat;
+    }
+
+    pub fn advance(&mut self) {
+        self.frame = self.frame.saturating_add(1);
+    }
+}
+
+pub fn advance_fighter_animation_frames(mut fighters: Query<&mut FighterAnimationFrame>) {
+    for mut animation in &mut fighters {
+        animation.advance();
+    }
+}
+
 pub fn apply_fighter_translation_to_visuals(
     query: Query<(&FighterTranslation, &FighterECB, &mut Transform)>,
 ) {
@@ -47,11 +78,16 @@ pub fn setup_fighter_animation_player(
     }
 }
 
-pub fn apply_animation(children: Query<(&mut Transform, &FighterFacingDirection), With<FighterVisual>>) {
-    for (mut trf, facing_direction) in children {
+pub fn apply_animation(children: Query<(&mut Transform, &FighterFacingDirection, &FighterAnimationFrame), With<FighterVisual>>) {
+    for (mut trf, facing_direction, frame) in children {
         // Melee model scale is in decimeters
         trf.rotation = Quat::IDENTITY;
-        trf.rotate_local_y(std::f32::consts::PI * 0.5 * facing_direction.to_sign().to_num::<f32>());
+        if let AnimKind::Turn = frame.kind {
+            trf.rotate_local_y(std::f32::consts::PI * -0.5 * facing_direction.to_sign().to_num::<f32>());
+        } else {
+            trf.rotate_local_y(std::f32::consts::PI * 0.5 * facing_direction.to_sign().to_num::<f32>());
+        }
+        
     }
 }
 
@@ -92,4 +128,5 @@ pub enum AnimKind {
     Landing,
     AirDodge,
     Fall,
+    Turn,
 }