refactor: store common components & bundles in 'common' submodule, move others directly into relevant files, create 'animation' submodule

src/game.rs

@@ -42,8 +42,7 @@ use crate::{
     asset::{get_asset_bytes, Asset},
     events::GameCommand,
     map::render::MapRenderer,
-    systems::debug::{BatchedLinesResource, TtfAtlasResource},
-    systems::input::{Bindings, CursorPosition},
+    systems::{BatchedLinesResource, Bindings, CursorPosition, TtfAtlasResource},
     texture::sprite::{AtlasMapper, SpriteAtlas},
 };
 

src/map/builder.rs

@@ -3,7 +3,7 @@ use crate::constants::{MapTile, BOARD_CELL_SIZE, CELL_SIZE};
 use crate::map::direction::Direction;
 use crate::map::graph::{Graph, Node, TraversalFlags};
 use crate::map::parser::MapTileParser;
-use crate::systems::movement::NodeId;
+use crate::systems::NodeId;
 use bevy_ecs::resource::Resource;
 use glam::{I8Vec2, IVec2, Vec2};
 use std::collections::{HashMap, VecDeque};

src/map/graph.rs

@@ -1,6 +1,6 @@
 use glam::Vec2;
 
-use crate::systems::movement::NodeId;
+use crate::systems::NodeId;
 
 use super::direction::Direction;
 

src/systems/animation.rs

@@ -0,0 +1,132 @@
+use bevy_ecs::{
+    component::Component,
+    query::{Has, Or, With, Without},
+    resource::Resource,
+    system::{Query, Res},
+};
+
+use crate::{
+    systems::{DeltaTime, Dying, Frozen, Position, Renderable, Velocity},
+    texture::animated::{DirectionalTiles, TileSequence},
+};
+
+/// Directional animation component with shared timing across all directions
+#[derive(Component, Clone)]
+pub struct DirectionalAnimation {
+    pub moving_tiles: DirectionalTiles,
+    pub stopped_tiles: DirectionalTiles,
+    pub current_frame: usize,
+    pub time_bank: u16,
+    pub frame_duration: u16,
+}
+
+impl DirectionalAnimation {
+    /// Creates a new directional animation with the given tiles and frame duration
+    pub fn new(moving_tiles: DirectionalTiles, stopped_tiles: DirectionalTiles, frame_duration: u16) -> Self {
+        Self {
+            moving_tiles,
+            stopped_tiles,
+            current_frame: 0,
+            time_bank: 0,
+            frame_duration,
+        }
+    }
+}
+
+/// Tag component to mark animations that should loop when they reach the end
+#[derive(Component, Clone, Copy, Debug, PartialEq, Eq)]
+pub struct Looping;
+
+/// Linear animation component for non-directional animations (frightened ghosts)
+#[derive(Component, Resource, Clone)]
+pub struct LinearAnimation {
+    pub tiles: TileSequence,
+    pub current_frame: usize,
+    pub time_bank: u16,
+    pub frame_duration: u16,
+    pub finished: bool,
+}
+
+impl LinearAnimation {
+    /// Creates a new linear animation with the given tiles and frame duration
+    pub fn new(tiles: TileSequence, frame_duration: u16) -> Self {
+        Self {
+            tiles,
+            current_frame: 0,
+            time_bank: 0,
+            frame_duration,
+            finished: false,
+        }
+    }
+}
+
+/// Updates directional animated entities with synchronized timing across directions.
+///
+/// This runs before the render system to update sprites based on current direction and movement state.
+/// All directions share the same frame timing to ensure perfect synchronization.
+pub fn directional_render_system(
+    dt: Res<DeltaTime>,
+    mut query: Query<(&Position, &Velocity, &mut DirectionalAnimation, &mut Renderable), Without<Frozen>>,
+) {
+    let ticks = (dt.seconds * 60.0).round() as u16; // Convert from seconds to ticks at 60 ticks/sec
+
+    for (position, velocity, mut anim, mut renderable) in query.iter_mut() {
+        let stopped = matches!(position, Position::Stopped { .. });
+
+        // Only tick animation when moving to preserve stopped frame
+        if !stopped {
+            // Tick shared animation state
+            anim.time_bank += ticks;
+            while anim.time_bank >= anim.frame_duration {
+                anim.time_bank -= anim.frame_duration;
+                anim.current_frame += 1;
+            }
+        }
+
+        // Get tiles for current direction and movement state
+        let tiles = if stopped {
+            anim.stopped_tiles.get(velocity.direction)
+        } else {
+            anim.moving_tiles.get(velocity.direction)
+        };
+
+        if !tiles.is_empty() {
+            let new_tile = tiles.get_tile(anim.current_frame);
+            if renderable.sprite != new_tile {
+                renderable.sprite = new_tile;
+            }
+        }
+    }
+}
+
+/// System that updates `Renderable` sprites for entities with `LinearAnimation`.
+#[allow(clippy::type_complexity)]
+pub fn linear_render_system(
+    dt: Res<DeltaTime>,
+    mut query: Query<(&mut LinearAnimation, &mut Renderable, Has<Looping>), Or<(Without<Frozen>, With<Dying>)>>,
+) {
+    for (mut anim, mut renderable, looping) in query.iter_mut() {
+        if anim.finished {
+            continue;
+        }
+
+        anim.time_bank += dt.ticks as u16;
+        let frames_to_advance = (anim.time_bank / anim.frame_duration) as usize;
+
+        if frames_to_advance == 0 {
+            continue;
+        }
+
+        let total_frames = anim.tiles.len();
+
+        if !looping && anim.current_frame + frames_to_advance >= total_frames {
+            anim.finished = true;
+            anim.current_frame = total_frames - 1;
+        } else {
+            anim.current_frame += frames_to_advance;
+        }
+
+        anim.time_bank %= anim.frame_duration;
+        renderable.sprite = anim.tiles.get_tile(anim.current_frame);
+    }
+}

src/systems/blinking.rs

@@ -5,10 +5,7 @@ use bevy_ecs::{
     system::{Commands, Query, Res},
 };
 
-use crate::systems::{
-    components::{DeltaTime, Renderable},
-    Frozen, Hidden,
-};
+use crate::systems::{DeltaTime, Frozen, Hidden, Renderable};
 
 #[derive(Component, Debug)]
 pub struct Blinking {

src/systems/collision.rs

@@ -7,13 +7,10 @@ use bevy_ecs::{
 };
 use tracing::{debug, trace, warn};
 
-use crate::error::GameError;
 use crate::events::{GameEvent, StageTransition};
 use crate::map::builder::Map;
-use crate::systems::{
-    components::GhostState, movement::Position, AudioEvent, DyingSequence, Frozen, GameStage, Ghost, PlayerControlled,
-    ScoreResource,
-};
+use crate::systems::{movement::Position, AudioEvent, DyingSequence, Frozen, GameStage, Ghost, PlayerControlled, ScoreResource};
+use crate::{error::GameError, systems::GhostState};
 
 /// A component for defining the collision area of an entity.
 #[derive(Component)]

src/systems/common/bundles.rs

@@ -0,0 +1,43 @@
+use bevy_ecs::bundle::Bundle;
+
+use crate::systems::{
+    BufferedDirection, Collider, DirectionalAnimation, EntityType, Ghost, GhostCollider, GhostState, ItemCollider,
+    LastAnimationState, MovementModifiers, PacmanCollider, PlayerControlled, Position, Renderable, Velocity,
+};
+
+#[derive(Bundle)]
+pub struct PlayerBundle {
+    pub player: PlayerControlled,
+    pub position: Position,
+    pub velocity: Velocity,
+    pub buffered_direction: BufferedDirection,
+    pub sprite: Renderable,
+    pub directional_animation: DirectionalAnimation,
+    pub entity_type: EntityType,
+    pub collider: Collider,
+    pub movement_modifiers: MovementModifiers,
+    pub pacman_collider: PacmanCollider,
+}
+
+#[derive(Bundle)]
+pub struct ItemBundle {
+    pub position: Position,
+    pub sprite: Renderable,
+    pub entity_type: EntityType,
+    pub collider: Collider,
+    pub item_collider: ItemCollider,
+}
+
+#[derive(Bundle)]
+pub struct GhostBundle {
+    pub ghost: Ghost,
+    pub position: Position,
+    pub velocity: Velocity,
+    pub sprite: Renderable,
+    pub directional_animation: DirectionalAnimation,
+    pub entity_type: EntityType,
+    pub collider: Collider,
+    pub ghost_collider: GhostCollider,
+    pub ghost_state: GhostState,
+    pub last_animation_state: LastAnimationState,
+}

src/systems/common/components.rs

@@ -0,0 +1,103 @@
+use bevy_ecs::{component::Component, resource::Resource};
+
+use crate::map::graph::TraversalFlags;
+
+/// A tag component denoting the type of entity.
+#[derive(Component, Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum EntityType {
+    Player,
+    Ghost,
+    Pellet,
+    PowerPellet,
+}
+
+impl EntityType {
+    /// Returns the traversal flags for this entity type.
+    pub fn traversal_flags(&self) -> TraversalFlags {
+        match self {
+            EntityType::Player => TraversalFlags::PACMAN,
+            EntityType::Ghost => TraversalFlags::GHOST,
+            _ => TraversalFlags::empty(), // Static entities don't traverse
+        }
+    }
+    pub fn score_value(&self) -> Option<u32> {
+        match self {
+            EntityType::Pellet => Some(10),
+            EntityType::PowerPellet => Some(50),
+            _ => None,
+        }
+    }
+
+    pub fn is_collectible(&self) -> bool {
+        matches!(self, EntityType::Pellet | EntityType::PowerPellet)
+    }
+}
+
+#[derive(Resource)]
+pub struct GlobalState {
+    pub exit: bool,
+}
+
+#[derive(Resource)]
+pub struct ScoreResource(pub u32);
+
+#[derive(Resource)]
+pub struct DeltaTime {
+    /// Floating-point delta time in seconds
+    pub seconds: f32,
+    /// Integer tick delta (usually 1, but can be different for testing)
+    pub ticks: u32,
+}
+
+#[allow(dead_code)]
+impl DeltaTime {
+    /// Creates a new DeltaTime from a floating-point delta time in seconds
+    ///
+    /// While this method exists as a helper, it does not mean that seconds and ticks are interchangeable.
+    pub fn from_seconds(seconds: f32) -> Self {
+        Self {
+            seconds,
+            ticks: (seconds * 60.0).round() as u32,
+        }
+    }
+
+    /// Creates a new DeltaTime from an integer tick delta
+    ///
+    /// While this method exists as a helper, it does not mean that seconds and ticks are interchangeable.
+    pub fn from_ticks(ticks: u32) -> Self {
+        Self {
+            seconds: ticks as f32 / 60.0,
+            ticks,
+        }
+    }
+}
+
+/// Movement modifiers that can affect Pac-Man's speed or handling.
+#[derive(Component, Debug, Clone, Copy)]
+pub struct MovementModifiers {
+    /// Multiplier applied to base speed (e.g., tunnels)
+    pub speed_multiplier: f32,
+    /// True when currently in a tunnel slowdown region
+    pub tunnel_slowdown_active: bool,
+}
+
+impl Default for MovementModifiers {
+    fn default() -> Self {
+        Self {
+            speed_multiplier: 1.0,
+            tunnel_slowdown_active: false,
+        }
+    }
+}
+
+/// Tag component for entities that should be frozen during startup
+#[derive(Component, Debug, Clone, Copy)]
+pub struct Frozen;
+
+/// Component for HUD life sprite entities.
+/// Each life sprite entity has an index indicating its position from left to right (0, 1, 2, etc.).
+/// This mostly functions as a tag component for sprites.
+#[derive(Component, Debug, Clone, Copy)]
+pub struct PlayerLife {
+    pub index: u32,
+}

src/systems/common/mod.rs

@@ -0,0 +1,5 @@
+pub mod bundles;
+pub mod components;
+
+pub use self::bundles::*;
+pub use self::components::*;

src/systems/components.rs

@@ -1,411 +0,0 @@
-use std::collections::HashMap;
-
-use bevy_ecs::{bundle::Bundle, component::Component, resource::Resource};
-use bitflags::bitflags;
-
-use crate::{
-    map::graph::TraversalFlags,
-    systems::{
-        movement::{BufferedDirection, Position, Velocity},
-        Collider, GhostCollider, ItemCollider, PacmanCollider,
-    },
-    texture::{
-        animated::{DirectionalTiles, TileSequence},
-        sprite::AtlasTile,
-    },
-};
-
-/// A tag component for entities that are controlled by the player.
-#[derive(Default, Component)]
-pub struct PlayerControlled;
-
-#[derive(Component, Debug, Clone, Copy, PartialEq, Eq, Hash)]
-pub enum Ghost {
-    Blinky,
-    Pinky,
-    Inky,
-    Clyde,
-}
-
-impl Ghost {
-    /// Returns the ghost type name for atlas lookups.
-    pub fn as_str(self) -> &'static str {
-        match self {
-            Ghost::Blinky => "blinky",
-            Ghost::Pinky => "pinky",
-            Ghost::Inky => "inky",
-            Ghost::Clyde => "clyde",
-        }
-    }
-
-    /// Returns the base movement speed for this ghost type.
-    pub fn base_speed(self) -> f32 {
-        match self {
-            Ghost::Blinky => 1.0,
-            Ghost::Pinky => 0.95,
-            Ghost::Inky => 0.9,
-            Ghost::Clyde => 0.85,
-        }
-    }
-
-    /// Returns the ghost's color for debug rendering.
-    #[allow(dead_code)]
-    pub fn debug_color(&self) -> sdl2::pixels::Color {
-        match self {
-            Ghost::Blinky => sdl2::pixels::Color::RGB(255, 0, 0),    // Red
-            Ghost::Pinky => sdl2::pixels::Color::RGB(255, 182, 255), // Pink
-            Ghost::Inky => sdl2::pixels::Color::RGB(0, 255, 255),    // Cyan
-            Ghost::Clyde => sdl2::pixels::Color::RGB(255, 182, 85),  // Orange
-        }
-    }
-}
-
-/// A tag component denoting the type of entity.
-#[derive(Component, Debug, Clone, Copy, PartialEq, Eq, Hash)]
-pub enum EntityType {
-    Player,
-    Ghost,
-    Pellet,
-    PowerPellet,
-}
-
-impl EntityType {
-    /// Returns the traversal flags for this entity type.
-    pub fn traversal_flags(&self) -> TraversalFlags {
-        match self {
-            EntityType::Player => TraversalFlags::PACMAN,
-            EntityType::Ghost => TraversalFlags::GHOST,
-            _ => TraversalFlags::empty(), // Static entities don't traverse
-        }
-    }
-    pub fn score_value(&self) -> Option<u32> {
-        match self {
-            EntityType::Pellet => Some(10),
-            EntityType::PowerPellet => Some(50),
-            _ => None,
-        }
-    }
-
-    pub fn is_collectible(&self) -> bool {
-        matches!(self, EntityType::Pellet | EntityType::PowerPellet)
-    }
-}
-
-/// A component for entities that have a sprite, with a layer for ordering.
-///
-/// This is intended to be modified by other entities allowing animation.
-#[derive(Component)]
-pub struct Renderable {
-    pub sprite: AtlasTile,
-    pub layer: u8,
-}
-
-/// Directional animation component with shared timing across all directions
-#[derive(Component, Clone)]
-pub struct DirectionalAnimation {
-    pub moving_tiles: DirectionalTiles,
-    pub stopped_tiles: DirectionalTiles,
-    pub current_frame: usize,
-    pub time_bank: u16,
-    pub frame_duration: u16,
-}
-
-impl DirectionalAnimation {
-    /// Creates a new directional animation with the given tiles and frame duration
-    pub fn new(moving_tiles: DirectionalTiles, stopped_tiles: DirectionalTiles, frame_duration: u16) -> Self {
-        Self {
-            moving_tiles,
-            stopped_tiles,
-            current_frame: 0,
-            time_bank: 0,
-            frame_duration,
-        }
-    }
-}
-
-/// Tag component to mark animations that should loop when they reach the end
-#[derive(Component, Clone, Copy, Debug, PartialEq, Eq)]
-pub struct Looping;
-
-/// Linear animation component for non-directional animations (frightened ghosts)
-#[derive(Component, Resource, Clone)]
-pub struct LinearAnimation {
-    pub tiles: TileSequence,
-    pub current_frame: usize,
-    pub time_bank: u16,
-    pub frame_duration: u16,
-    pub finished: bool,
-}
-
-impl LinearAnimation {
-    /// Creates a new linear animation with the given tiles and frame duration
-    pub fn new(tiles: TileSequence, frame_duration: u16) -> Self {
-        Self {
-            tiles,
-            current_frame: 0,
-            time_bank: 0,
-            frame_duration,
-            finished: false,
-        }
-    }
-}
-
-bitflags! {
-    #[derive(Component, Default, Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
-    pub struct CollisionLayer: u8 {
-        const PACMAN = 1 << 0;
-        const GHOST = 1 << 1;
-        const ITEM = 1 << 2;
-    }
-}
-
-#[derive(Resource)]
-pub struct GlobalState {
-    pub exit: bool,
-}
-
-#[derive(Resource)]
-pub struct ScoreResource(pub u32);
-
-#[derive(Resource)]
-pub struct DeltaTime {
-    /// Floating-point delta time in seconds
-    pub seconds: f32,
-    /// Integer tick delta (usually 1, but can be different for testing)
-    pub ticks: u32,
-}
-
-#[allow(dead_code)]
-impl DeltaTime {
-    /// Creates a new DeltaTime from a floating-point delta time in seconds
-    ///
-    /// While this method exists as a helper, it does not mean that seconds and ticks are interchangeable.
-    pub fn from_seconds(seconds: f32) -> Self {
-        Self {
-            seconds,
-            ticks: (seconds * 60.0).round() as u32,
-        }
-    }
-
-    /// Creates a new DeltaTime from an integer tick delta
-    ///
-    /// While this method exists as a helper, it does not mean that seconds and ticks are interchangeable.
-    pub fn from_ticks(ticks: u32) -> Self {
-        Self {
-            seconds: ticks as f32 / 60.0,
-            ticks,
-        }
-    }
-}
-
-/// Movement modifiers that can affect Pac-Man's speed or handling.
-#[derive(Component, Debug, Clone, Copy)]
-pub struct MovementModifiers {
-    /// Multiplier applied to base speed (e.g., tunnels)
-    pub speed_multiplier: f32,
-    /// True when currently in a tunnel slowdown region
-    pub tunnel_slowdown_active: bool,
-}
-
-impl Default for MovementModifiers {
-    fn default() -> Self {
-        Self {
-            speed_multiplier: 1.0,
-            tunnel_slowdown_active: false,
-        }
-    }
-}
-
-/// Tag component for entities that should be frozen during startup
-#[derive(Component, Debug, Clone, Copy)]
-pub struct Frozen;
-
-/// Tag component for eaten ghosts
-#[derive(Component, Debug, Clone, Copy)]
-pub struct Eaten;
-
-/// Tag component for Pac-Man during his death animation.
-/// This is mainly because the Frozen tag would stop both movement and animation, while the Dying tag can signal that the animation should continue despite being frozen.
-#[derive(Component, Debug, Clone, Copy)]
-pub struct Dying;
-
-/// Component for HUD life sprite entities.
-/// Each life sprite entity has an index indicating its position from left to right (0, 1, 2, etc.).
-/// This mostly functions as a tag component for sprites.
-#[derive(Component, Debug, Clone, Copy)]
-pub struct PlayerLife {
-    pub index: u32,
-}
-
-#[derive(Component, Debug, Clone, Copy)]
-pub enum GhostState {
-    /// Normal ghost behavior - chasing Pac-Man
-    Normal,
-    /// Frightened state after power pellet - ghost can be eaten
-    Frightened {
-        remaining_ticks: u32,
-        flash: bool,
-        remaining_flash_ticks: u32,
-    },
-    /// Eyes state - ghost has been eaten and is returning to ghost house
-    Eyes,
-}
-
-/// Component to track the last animation state for efficient change detection
-#[derive(Component, Debug, Clone, Copy, PartialEq)]
-pub struct LastAnimationState(pub GhostAnimation);
-
-impl GhostState {
-    /// Creates a new frightened state with the specified duration
-    pub fn new_frightened(total_ticks: u32, flash_start_ticks: u32) -> Self {
-        Self::Frightened {
-            remaining_ticks: total_ticks,
-            flash: false,
-            remaining_flash_ticks: flash_start_ticks, // Time until flashing starts
-        }
-    }
-
-    /// Ticks the ghost state, returning true if the state changed.
-    pub fn tick(&mut self) -> bool {
-        if let GhostState::Frightened {
-            remaining_ticks,
-            flash,
-            remaining_flash_ticks,
-        } = self
-        {
-            // Transition out of frightened state
-            if *remaining_ticks == 0 {
-                *self = GhostState::Normal;
-                return true;
-            }
-
-            *remaining_ticks -= 1;
-
-            if *remaining_flash_ticks > 0 {
-                *remaining_flash_ticks = remaining_flash_ticks.saturating_sub(1);
-                if *remaining_flash_ticks == 0 {
-                    *flash = true;
-                    true
-                } else {
-                    false
-                }
-            } else {
-                false
-            }
-        } else {
-            false
-        }
-    }
-
-    /// Returns the appropriate animation state for this ghost state
-    pub fn animation_state(&self) -> GhostAnimation {
-        match self {
-            GhostState::Normal => GhostAnimation::Normal,
-            GhostState::Eyes => GhostAnimation::Eyes,
-            GhostState::Frightened { flash: false, .. } => GhostAnimation::Frightened { flash: false },
-            GhostState::Frightened { flash: true, .. } => GhostAnimation::Frightened { flash: true },
-        }
-    }
-}
-
-/// Enumeration of different ghost animation states.
-/// Note that this is used in micromap which has a fixed size based on the number of variants,
-/// so extending this should be done with caution, and will require updating the micromap's capacity.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
-pub enum GhostAnimation {
-    /// Normal ghost appearance with directional movement animations
-    Normal,
-    /// Blue ghost appearance when vulnerable (power pellet active)
-    Frightened { flash: bool },
-    /// Eyes-only animation when ghost has been consumed by Pac-Man (Eaten state)
-    Eyes,
-}
-
-/// Global resource containing pre-loaded animation sets for all ghost types.
-///
-/// This resource is initialized once during game startup and provides O(1) access
-/// to animation sets for each ghost type. The animation system uses this resource
-/// to efficiently switch between different ghost states without runtime asset loading.
-///
-/// The HashMap is keyed by `Ghost` enum variants (Blinky, Pinky, Inky, Clyde) and
-/// contains the normal directional animation for each ghost type.
-#[derive(Resource)]
-pub struct GhostAnimations {
-    pub normal: HashMap<Ghost, DirectionalAnimation>,
-    pub eyes: DirectionalAnimation,
-    pub frightened: LinearAnimation,
-    pub frightened_flashing: LinearAnimation,
-}
-
-impl GhostAnimations {
-    /// Creates a new GhostAnimations resource with the provided data.
-    pub fn new(
-        normal: HashMap<Ghost, DirectionalAnimation>,
-        eyes: DirectionalAnimation,
-        frightened: LinearAnimation,
-        frightened_flashing: LinearAnimation,
-    ) -> Self {
-        Self {
-            normal,
-            eyes,
-            frightened,
-            frightened_flashing,
-        }
-    }
-
-    /// Gets the normal directional animation for the specified ghost type.
-    pub fn get_normal(&self, ghost_type: &Ghost) -> Option<&DirectionalAnimation> {
-        self.normal.get(ghost_type)
-    }
-
-    /// Gets the eyes animation (shared across all ghosts).
-    pub fn eyes(&self) -> &DirectionalAnimation {
-        &self.eyes
-    }
-
-    /// Gets the frightened animations (shared across all ghosts).
-    pub fn frightened(&self, flash: bool) -> &LinearAnimation {
-        if flash {
-            &self.frightened_flashing
-        } else {
-            &self.frightened
-        }
-    }
-}
-
-#[derive(Bundle)]
-pub struct PlayerBundle {
-    pub player: PlayerControlled,
-    pub position: Position,
-    pub velocity: Velocity,
-    pub buffered_direction: BufferedDirection,
-    pub sprite: Renderable,
-    pub directional_animation: DirectionalAnimation,
-    pub entity_type: EntityType,
-    pub collider: Collider,
-    pub movement_modifiers: MovementModifiers,
-    pub pacman_collider: PacmanCollider,
-}
-
-#[derive(Bundle)]
-pub struct ItemBundle {
-    pub position: Position,
-    pub sprite: Renderable,
-    pub entity_type: EntityType,
-    pub collider: Collider,
-    pub item_collider: ItemCollider,
-}
-
-#[derive(Bundle)]
-pub struct GhostBundle {
-    pub ghost: Ghost,
-    pub position: Position,
-    pub velocity: Velocity,
-    pub sprite: Renderable,
-    pub directional_animation: DirectionalAnimation,
-    pub entity_type: EntityType,
-    pub collider: Collider,
-    pub ghost_collider: GhostCollider,
-    pub ghost_state: GhostState,
-    pub last_animation_state: LastAnimationState,
-}

src/systems/ghost.rs

@@ -1,7 +1,7 @@
+use std::collections::HashMap;
+
 use crate::platform;
-use crate::systems::components::{
-    DirectionalAnimation, Frozen, GhostAnimation, GhostState, LastAnimationState, LinearAnimation, Looping,
-};
+use crate::systems::{DirectionalAnimation, Frozen, LinearAnimation, Looping};
 use crate::{
     map::{
         builder::Map,
@@ -9,18 +9,201 @@ use crate::{
         graph::{Edge, TraversalFlags},
     },
     systems::{
-        components::{DeltaTime, Ghost},
+        components::DeltaTime,
         movement::{Position, Velocity},
     },
 };
+use bevy_ecs::component::Component;
+use bevy_ecs::resource::Resource;
 use tracing::{debug, trace, warn};
 
-use crate::systems::GhostAnimations;
 use bevy_ecs::query::Without;
 use bevy_ecs::system::{Commands, Query, Res};
 use rand::seq::IndexedRandom;
 use smallvec::SmallVec;
 
+/// Tag component for eaten ghosts
+#[derive(Component, Debug, Clone, Copy)]
+pub struct Eaten;
+
+/// Tag component for Pac-Man during his death animation.
+/// This is mainly because the Frozen tag would stop both movement and animation, while the Dying tag can signal that the animation should continue despite being frozen.
+#[derive(Component, Debug, Clone, Copy)]
+pub struct Dying;
+
+#[derive(Component, Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Ghost {
+    Blinky,
+    Pinky,
+    Inky,
+    Clyde,
+}
+
+impl Ghost {
+    /// Returns the ghost type name for atlas lookups.
+    pub fn as_str(self) -> &'static str {
+        match self {
+            Ghost::Blinky => "blinky",
+            Ghost::Pinky => "pinky",
+            Ghost::Inky => "inky",
+            Ghost::Clyde => "clyde",
+        }
+    }
+
+    /// Returns the base movement speed for this ghost type.
+    pub fn base_speed(self) -> f32 {
+        match self {
+            Ghost::Blinky => 1.0,
+            Ghost::Pinky => 0.95,
+            Ghost::Inky => 0.9,
+            Ghost::Clyde => 0.85,
+        }
+    }
+
+    /// Returns the ghost's color for debug rendering.
+    #[allow(dead_code)]
+    pub fn debug_color(&self) -> sdl2::pixels::Color {
+        match self {
+            Ghost::Blinky => sdl2::pixels::Color::RGB(255, 0, 0),    // Red
+            Ghost::Pinky => sdl2::pixels::Color::RGB(255, 182, 255), // Pink
+            Ghost::Inky => sdl2::pixels::Color::RGB(0, 255, 255),    // Cyan
+            Ghost::Clyde => sdl2::pixels::Color::RGB(255, 182, 85),  // Orange
+        }
+    }
+}
+
+#[derive(Component, Debug, Clone, Copy)]
+pub enum GhostState {
+    /// Normal ghost behavior - chasing Pac-Man
+    Normal,
+    /// Frightened state after power pellet - ghost can be eaten
+    Frightened {
+        remaining_ticks: u32,
+        flash: bool,
+        remaining_flash_ticks: u32,
+    },
+    /// Eyes state - ghost has been eaten and is returning to ghost house
+    Eyes,
+}
+
+impl GhostState {
+    /// Creates a new frightened state with the specified duration
+    pub fn new_frightened(total_ticks: u32, flash_start_ticks: u32) -> Self {
+        Self::Frightened {
+            remaining_ticks: total_ticks,
+            flash: false,
+            remaining_flash_ticks: flash_start_ticks, // Time until flashing starts
+        }
+    }
+
+    /// Ticks the ghost state, returning true if the state changed.
+    pub fn tick(&mut self) -> bool {
+        if let GhostState::Frightened {
+            remaining_ticks,
+            flash,
+            remaining_flash_ticks,
+        } = self
+        {
+            // Transition out of frightened state
+            if *remaining_ticks == 0 {
+                *self = GhostState::Normal;
+                return true;
+            }
+
+            *remaining_ticks -= 1;
+
+            if *remaining_flash_ticks > 0 {
+                *remaining_flash_ticks = remaining_flash_ticks.saturating_sub(1);
+                if *remaining_flash_ticks == 0 {
+                    *flash = true;
+                    true
+                } else {
+                    false
+                }
+            } else {
+                false
+            }
+        } else {
+            false
+        }
+    }
+
+    /// Returns the appropriate animation state for this ghost state
+    pub fn animation_state(&self) -> GhostAnimation {
+        match self {
+            GhostState::Normal => GhostAnimation::Normal,
+            GhostState::Eyes => GhostAnimation::Eyes,
+            GhostState::Frightened { flash: false, .. } => GhostAnimation::Frightened { flash: false },
+            GhostState::Frightened { flash: true, .. } => GhostAnimation::Frightened { flash: true },
+        }
+    }
+}
+
+/// Enumeration of different ghost animation states.
+/// Note that this is used in micromap which has a fixed size based on the number of variants,
+/// so extending this should be done with caution, and will require updating the micromap's capacity.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum GhostAnimation {
+    /// Normal ghost appearance with directional movement animations
+    Normal,
+    /// Blue ghost appearance when vulnerable (power pellet active)
+    Frightened { flash: bool },
+    /// Eyes-only animation when ghost has been consumed by Pac-Man (Eaten state)
+    Eyes,
+}
+
+/// Global resource containing pre-loaded animation sets for all ghost types.
+///
+/// This resource is initialized once during game startup and provides O(1) access
+/// to animation sets for each ghost type. The animation system uses this resource
+/// to efficiently switch between different ghost states without runtime asset loading.
+///
+/// The HashMap is keyed by `Ghost` enum variants (Blinky, Pinky, Inky, Clyde) and
+/// contains the normal directional animation for each ghost type.
+#[derive(Resource)]
+pub struct GhostAnimations {
+    pub normal: HashMap<Ghost, DirectionalAnimation>,
+    pub eyes: DirectionalAnimation,
+    pub frightened: LinearAnimation,
+    pub frightened_flashing: LinearAnimation,
+}
+
+impl GhostAnimations {
+    /// Creates a new GhostAnimations resource with the provided data.
+    pub fn new(
+        normal: HashMap<Ghost, DirectionalAnimation>,
+        eyes: DirectionalAnimation,
+        frightened: LinearAnimation,
+        frightened_flashing: LinearAnimation,
+    ) -> Self {
+        Self {
+            normal,
+            eyes,
+            frightened,
+            frightened_flashing,
+        }
+    }
+
+    /// Gets the normal directional animation for the specified ghost type.
+    pub fn get_normal(&self, ghost_type: &Ghost) -> Option<&DirectionalAnimation> {
+        self.normal.get(ghost_type)
+    }
+
+    /// Gets the eyes animation (shared across all ghosts).
+    pub fn eyes(&self) -> &DirectionalAnimation {
+        &self.eyes
+    }
+
+    /// Gets the frightened animations (shared across all ghosts).
+    pub fn frightened(&self, flash: bool) -> &LinearAnimation {
+        if flash {
+            &self.frightened_flashing
+        } else {
+            &self.frightened
+        }
+    }
+}
+
 /// Autonomous ghost AI system implementing randomized movement with backtracking avoidance.
 pub fn ghost_movement_system(
     map: Res<Map>,
@@ -185,6 +368,10 @@ fn find_direction_to_target(
     None
 }
 
+/// Component to track the last animation state for efficient change detection
+#[derive(Component, Debug, Clone, Copy, PartialEq)]
+pub struct LastAnimationState(pub GhostAnimation);
+
 /// Unified system that manages ghost state transitions and animations with component swapping
 pub fn ghost_state_system(
     mut commands: Commands,

src/systems/input.rs

@@ -13,7 +13,7 @@ use sdl2::{
 };
 use smallvec::{smallvec, SmallVec};
 
-use crate::systems::components::DeltaTime;
+use crate::systems::DeltaTime;
 use crate::{
     events::{GameCommand, GameEvent},
     map::direction::Direction,

src/systems/item.rs

@@ -2,7 +2,7 @@ use bevy_ecs::{
     entity::Entity,
     event::{EventReader, EventWriter},
     query::With,
-    system::{Commands, Query, ResMut},
+    system::{Commands, Query, ResMut, Single},
 };
 use tracing::{debug, trace};
 
@@ -27,7 +27,7 @@ pub fn item_system(
     mut commands: Commands,
     mut collision_events: EventReader<GameEvent>,
     mut score: ResMut<ScoreResource>,
-    pacman_query: Query<Entity, With<PacmanCollider>>,
+    pacman: Single<Entity, With<PacmanCollider>>,
     item_query: Query<(Entity, &EntityType), With<ItemCollider>>,
     mut ghost_query: Query<&mut GhostState, With<GhostCollider>>,
     mut events: EventWriter<AudioEvent>,
@@ -35,10 +35,10 @@ pub fn item_system(
     for event in collision_events.read() {
         if let GameEvent::Collision(entity1, entity2) = event {
             // Check if one is Pacman and the other is an item
-            let (_pacman_entity, item_entity) = if pacman_query.get(*entity1).is_ok() && item_query.get(*entity2).is_ok() {
-                (*entity1, *entity2)
-            } else if pacman_query.get(*entity2).is_ok() && item_query.get(*entity1).is_ok() {
-                (*entity2, *entity1)
+            let (_, item_entity) = if *pacman == *entity1 && item_query.get(*entity2).is_ok() {
+                (*pacman, *entity2)
+            } else if *pacman == *entity2 && item_query.get(*entity1).is_ok() {
+                (*pacman, *entity1)
             } else {
                 continue;
             };

src/systems/lifetime.rs

@@ -4,7 +4,7 @@ use bevy_ecs::{
     system::{Commands, Query, Res},
 };
 
-use crate::systems::components::DeltaTime;
+use crate::systems::DeltaTime;
 
 /// Component for entities that should be automatically deleted after a certain number of ticks
 #[derive(Component, Debug, Clone, Copy)]

src/systems/mod.rs

@@ -9,9 +9,10 @@ pub mod profiling;
 #[cfg_attr(coverage_nightly, coverage(off))]
 pub mod render;
 
+pub mod animation;
 pub mod blinking;
 pub mod collision;
-pub mod components;
+pub mod common;
 pub mod ghost;
 pub mod input;
 pub mod item;
@@ -22,10 +23,11 @@ pub mod state;
 
 // Re-export all the modules. Do not fine-tune the exports.
 
+pub use self::animation::*;
 pub use self::audio::*;
 pub use self::blinking::*;
 pub use self::collision::*;
-pub use self::components::*;
+pub use self::common::*;
 pub use self::debug::*;
 pub use self::ghost::*;
 pub use self::input::*;

src/systems/player.rs

@@ -1,4 +1,5 @@
 use bevy_ecs::{
+    component::Component,
     event::EventReader,
     query::{With, Without},
     system::{Query, Res, ResMut, Single},
@@ -9,13 +10,17 @@ use crate::{
     events::{GameCommand, GameEvent},
     map::{builder::Map, graph::Edge},
     systems::{
-        components::{DeltaTime, EntityType, Frozen, GlobalState, MovementModifiers, PlayerControlled},
+        components::{DeltaTime, EntityType, Frozen, GlobalState, MovementModifiers},
         debug::DebugState,
         movement::{BufferedDirection, Position, Velocity},
         AudioState,
     },
 };
 
+/// A tag component for entities that are controlled by the player.
+#[derive(Default, Component)]
+pub struct PlayerControlled;
+
 pub fn can_traverse(entity_type: EntityType, edge: Edge) -> bool {
     let entity_flags = entity_type.traversal_flags();
     edge.traversal_flags.contains(entity_flags)

src/systems/render.rs

@@ -1,12 +1,10 @@
 use crate::map::builder::Map;
 use crate::map::direction::Direction;
-use crate::systems::input::TouchState;
 use crate::systems::{
-    debug_render_system, BatchedLinesResource, Collider, CursorPosition, DebugState, DebugTextureResource, DeltaTime,
-    DirectionalAnimation, Dying, Frozen, GameStage, LinearAnimation, Looping, PlayerLife, PlayerLives, Position, Renderable,
-    ScoreResource, StartupSequence, SystemId, SystemTimings, TtfAtlasResource, Velocity,
+    debug_render_system, BatchedLinesResource, Collider, CursorPosition, DebugState, DebugTextureResource, GameStage, PlayerLife,
+    PlayerLives, Position, ScoreResource, StartupSequence, SystemId, SystemTimings, TouchState, TtfAtlasResource,
 };
-use crate::texture::sprite::SpriteAtlas;
+use crate::texture::sprite::{AtlasTile, SpriteAtlas};
 use crate::texture::sprites::{GameSprite, PacmanSprite};
 use crate::texture::text::TextTexture;
 use crate::{
@@ -16,7 +14,7 @@ use crate::{
 use bevy_ecs::component::Component;
 use bevy_ecs::entity::Entity;
 use bevy_ecs::event::EventWriter;
-use bevy_ecs::query::{Changed, Has, Or, With, Without};
+use bevy_ecs::query::{Changed, Or, With, Without};
 use bevy_ecs::removal_detection::RemovedComponents;
 use bevy_ecs::resource::Resource;
 use bevy_ecs::system::{Commands, NonSendMut, Query, Res, ResMut};
@@ -27,6 +25,15 @@ use sdl2::render::{BlendMode, Canvas, Texture};
 use sdl2::video::Window;
 use std::time::Instant;
 
+/// A component for entities that have a sprite, with a layer for ordering.
+///
+/// This is intended to be modified by other entities allowing animation.
+#[derive(Component)]
+pub struct Renderable {
+    pub sprite: AtlasTile,
+    pub layer: u8,
+}
+
 #[derive(Resource, Default)]
 pub struct RenderDirty(pub bool);
 
@@ -56,77 +63,6 @@ pub fn dirty_render_system(
     }
 }
 
-/// Updates directional animated entities with synchronized timing across directions.
-///
-/// This runs before the render system to update sprites based on current direction and movement state.
-/// All directions share the same frame timing to ensure perfect synchronization.
-pub fn directional_render_system(
-    dt: Res<DeltaTime>,
-    mut query: Query<(&Position, &Velocity, &mut DirectionalAnimation, &mut Renderable), Without<Frozen>>,
-) {
-    let ticks = (dt.seconds * 60.0).round() as u16; // Convert from seconds to ticks at 60 ticks/sec
-
-    for (position, velocity, mut anim, mut renderable) in query.iter_mut() {
-        let stopped = matches!(position, Position::Stopped { .. });
-
-        // Only tick animation when moving to preserve stopped frame
-        if !stopped {
-            // Tick shared animation state
-            anim.time_bank += ticks;
-            while anim.time_bank >= anim.frame_duration {
-                anim.time_bank -= anim.frame_duration;
-                anim.current_frame += 1;
-            }
-        }
-
-        // Get tiles for current direction and movement state
-        let tiles = if stopped {
-            anim.stopped_tiles.get(velocity.direction)
-        } else {
-            anim.moving_tiles.get(velocity.direction)
-        };
-
-        if !tiles.is_empty() {
-            let new_tile = tiles.get_tile(anim.current_frame);
-            if renderable.sprite != new_tile {
-                renderable.sprite = new_tile;
-            }
-        }
-    }
-}
-
-/// System that updates `Renderable` sprites for entities with `LinearAnimation`.
-#[allow(clippy::type_complexity)]
-pub fn linear_render_system(
-    dt: Res<DeltaTime>,
-    mut query: Query<(&mut LinearAnimation, &mut Renderable, Has<Looping>), Or<(Without<Frozen>, With<Dying>)>>,
-) {
-    for (mut anim, mut renderable, looping) in query.iter_mut() {
-        if anim.finished {
-            continue;
-        }
-
-        anim.time_bank += dt.ticks as u16;
-        let frames_to_advance = (anim.time_bank / anim.frame_duration) as usize;
-
-        if frames_to_advance == 0 {
-            continue;
-        }
-
-        let total_frames = anim.tiles.len();
-
-        if !looping && anim.current_frame + frames_to_advance >= total_frames {
-            anim.finished = true;
-            anim.current_frame = total_frames - 1;
-        } else {
-            anim.current_frame += frames_to_advance;
-        }
-
-        anim.time_bank %= anim.frame_duration;
-        renderable.sprite = anim.tiles.get_tile(anim.current_frame);
-    }
-}
-
 /// System that manages player life sprite entities.
 /// Spawns and despawns life sprite entities based on changes to PlayerLives resource.
 /// Each life sprite is positioned based on its index (0, 1, 2, etc. from left to right).

src/texture/sprites.rs

@@ -5,8 +5,7 @@
 //! The `GameSprite` enum is the main entry point, and its `to_path` method
 //! generates the correct path for a given sprite in the texture atlas.
 
-use crate::map::direction::Direction;
-use crate::systems::components::Ghost;
+use crate::{map::direction::Direction, systems::Ghost};
 
 /// Represents the different sprites for Pac-Man.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]

tests/blinking.rs

@@ -1,9 +1,5 @@
 use bevy_ecs::{entity::Entity, system::RunSystemOnce, world::World};
-use pacman::systems::{
-    blinking::{blinking_system, Blinking},
-    components::{DeltaTime, Renderable},
-    Frozen, Hidden,
-};
+use pacman::systems::{blinking_system, Blinking, DeltaTime, Frozen, Hidden, Renderable};
 use speculoos::prelude::*;
 
 mod common;

tests/sprites.rs

@@ -2,7 +2,7 @@
 use pacman::{
     game::ATLAS_FRAMES,
     map::direction::Direction,
-    systems::components::Ghost,
+    systems::Ghost,
     texture::sprites::{FrightenedColor, GameSprite, GhostSprite, MazeSprite, PacmanSprite},
 };