test: add tests for collision, items, directional, sprite

enum macros for FruitKind

.config/nextest.toml

@@ -1,5 +1,2 @@
 [profile.default]
 fail-fast = false
-
-[profile.coverage]
-status-level = "none"

.github/workflows/build.yaml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Setup Rust Toolchain
         uses: dtolnay/rust-toolchain@master
@@ -64,16 +64,15 @@ jobs:
         run: cargo build --release
 
       - name: Acquire Package Version
-        id: get_version
-        shell: bash # required to prevent Windows runners from failing
+        shell: bash
         run: |
-          set -euo pipefail # exit on error
-          echo "version=$(cargo metadata --format-version 1 --no-deps | jq '.packages[0].version' -r)" >> $GITHUB_OUTPUT
+          PACKAGE_VERSION=$(cargo metadata --format-version 1 --no-deps | jq '.packages[0].version' -r)
+          echo "PACKAGE_VERSION=${PACKAGE_VERSION}" >> $GITHUB_ENV
 
       - name: Upload Artifact
         uses: actions/upload-artifact@v4
         with:
-          name: "pacman-${{ steps.get_version.outputs.version }}-${{ matrix.target }}"
+          name: "pacman-${{ env.PACKAGE_VERSION }}-${{ matrix.target }}"
           path: ./target/release/${{ matrix.artifact_name }}
           retention-days: 7
           if-no-files-found: error
@@ -84,13 +83,10 @@ jobs:
     permissions:
       pages: write
       id-token: write
-    # concurrency group is used to prevent multiple page deployments from being attempted at the same time
-    concurrency:
-      group: ${{ github.workflow }}-wasm
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Setup Emscripten SDK
         uses: pyodide/setup-emsdk@v15
@@ -102,7 +98,7 @@ jobs:
         uses: dtolnay/rust-toolchain@master
         with:
           target: wasm32-unknown-emscripten
-          toolchain: 1.86.0
+          toolchain: 1.86.0 # we are unfortunately pinned to 1.86.0 for some reason, bulk-memory-opt related issues
 
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2

.github/workflows/coverage.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@master
@@ -42,39 +42,15 @@ jobs:
 
       - uses: taiki-e/install-action@cargo-llvm-cov
       - uses: taiki-e/install-action@nextest
-      - uses: taiki-e/install-action@just
 
+      # Note: We manually link zlib. This should be synchronized with the flags set for Linux in .cargo/config.toml.
       - name: Generate coverage report
         run: |
-          just coverage
-
-      - name: Download Coveralls CLI
-        run: |
-          # use GitHub Releases URL instead of coveralls.io because they can't maintain their own files; it 404s
-          curl -L https://github.com/coverallsapp/coverage-reporter/releases/download/v0.6.15/coveralls-linux-x86_64.tar.gz | tar -xz -C /usr/local/bin
+          cargo llvm-cov --no-fail-fast --lcov --output-path lcov.info nextest
 
       - name: Upload coverage to Coveralls
-        env:
-          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
-        run: |
-          if [ ! -f "lcov.info" ]; then
-            echo "Error: lcov.info file not found. Coverage generation may have failed."
-            exit 1
-          fi
-
-          for i in {1..10}; do
-            echo "Attempt $i: Uploading coverage to Coveralls..."
-            if coveralls -n report lcov.info; then
-              echo "Successfully uploaded coverage report."
-              exit 0
-            fi
-
-            if [ $i -lt 10 ]; then
-              delay=$((2**i))
-              echo "Attempt $i failed. Retrying in $delay seconds..."
-              sleep $delay
-            fi
-          done
-
-          echo "Failed to upload coverage report after 10 attempts."
-          exit 1
+        uses: coverallsapp/github-action@v2
+        with:
+          files: ./lcov.info
+          format: lcov
+          allow-empty: false

.github/workflows/tests.yaml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v4
 
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@master

.gitignore

@@ -1,17 +1,7 @@
-# IDE, Other files
-.vscode
-.idea
-rust-sdl2-emscripten/
-
-# Build files
 target/
 dist/
 emsdk/
-
-# Site build f iles
-tailwindcss-*
+.idea
+rust-sdl2-emscripten/
 assets/site/build.css
-
-# Coverage reports
-lcov.info
-coverage.html
+tailwindcss-*

Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tracing = { version = "0.1.41", features = ["max_level_debug", "release_max_level_debug"]}
+tracing = { version = "0.1.40", features = ["max_level_debug", "release_max_level_debug"]}
 tracing-error = "0.2.0"
 tracing-subscriber = {version = "0.3.17", features = ["env-filter"]}
 lazy_static = "1.5.0"
@@ -15,23 +15,14 @@ spin_sleep = "1.3.2"
 rand = { version = "0.9.2", default-features = false, features = ["small_rng", "os_rng"] }
 pathfinding = "4.14"
 once_cell = "1.21.3"
-thiserror = "2.0.14"
+thiserror = "1.0"
 anyhow = "1.0"
-glam = "0.30.5"
+glam = { version = "0.30.4", features = [] }
 serde = { version = "1.0.219", features = ["derive"] }
-serde_json = "1.0.142"
+serde_json = "1.0.141"
 smallvec = "1.15.1"
 strum = "0.27.2"
 strum_macros = "0.27.2"
-phf = { version = "0.12.1", features = ["macros"] }
-bevy_ecs = "0.16.1"
-bitflags = "2.9.1"
-parking_lot = "0.12.3"
-micromap = "0.1.0"
-thousands = "0.2.0"
-pretty_assertions = "1.4.1"
-num-width = "0.1.0"
-circular-buffer = "1.1.0"
 
 [profile.release]
 lto = true
@@ -65,9 +56,4 @@ x86_64-apple-darwin = { triplet = "x64-osx" }
 aarch64-apple-darwin = { triplet = "arm64-osx" }
 
 [target.'cfg(target_os = "emscripten")'.dependencies]
-libc = "0.2.175"
-
-[build-dependencies]
-serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
-phf = { version = "0.12.1", features = ["macros"] }
+libc = "0.2.16"

Justfile

@@ -1,33 +0,0 @@
-set shell := ["bash", "-c"]
-set windows-shell := ["powershell.exe", "-NoLogo", "-Command"]
-
-# Regex to exclude files from coverage report, double escapes for Justfile + CLI
-# You can use src\\\\..., but the filename alone is acceptable too
-coverage_exclude_pattern := "src\\\\app.rs|audio.rs|src\\\\error.rs|platform\\\\emscripten.rs"
-
-# !!! --ignore-filename-regex should be used on both reports & coverage testing
-# !!! --remap-path-prefix prevents the absolute path from being used in the generated report
-
-# Generate HTML report (for humans, source line inspection)
-html: coverage
-    cargo llvm-cov report \
-    --remap-path-prefix \
-    --ignore-filename-regex "{{ coverage_exclude_pattern }}" \
-    --html \
-    --open
-
-# Display report (for humans)
-report-coverage: coverage
-    cargo llvm-cov report \
-    --remap-path-prefix \
-    --ignore-filename-regex "{{ coverage_exclude_pattern }}"
-
-# Run & generate report (for CI)
-coverage:
-    cargo llvm-cov \
-    --lcov \
-    --remap-path-prefix \
-    --ignore-filename-regex "{{ coverage_exclude_pattern }}" \
-    --output-path lcov.info \
-    --profile coverage \
-    --no-fail-fast nextest

README.md

@@ -1,6 +1,6 @@
 # Pac-Man
 
-[![Tests Status][badge-test]][test] [![Build Status][badge-build]][build] [![If you're seeing this, Coveralls.io is broken again and it's not my fault.][badge-coverage]][coverage] [![Online Demo][badge-online-demo]][demo] [![Last Commit][badge-last-commit]][commits]
+[![Tests Status][badge-test]][test] [![Build Status][badge-build]][build] [![Code Coverage][badge-coverage]][coverage] [![Online Demo][badge-online-demo]][demo] [![Last Commit][badge-last-commit]][commits]
 
 [badge-test]: https://github.com/Xevion/Pac-Man/actions/workflows/tests.yaml/badge.svg
 [badge-build]: https://github.com/Xevion/Pac-Man/actions/workflows/build.yaml/badge.svg
@@ -72,8 +72,6 @@ I wanted to hit a log of goals and features, making it a 'perfect' project that
 
 Since this project is still in progress, I'm only going to cover non-obvious build details. By reading the code, build scripts, and copying the online build workflows, you should be able to replicate the build process.
 
-- We use rustc 1.86.0 for the build, due to bulk-memory-opt related issues on wasm32-unknown-emscripten.
-  - Technically, we could probably use stable or even nightly on desktop targets, but using different versions for different targets is a pain, mainly because of clippy warnings changing between versions.
 - Install `cargo-vcpkg` with `cargo install cargo-vcpkg`, then run `cargo vcpkg build` to build the requisite dependencies via vcpkg.
 - For the WASM build, you need to have the Emscripten SDK cloned; you can do so with `git clone https://github.com/emscripten-core/emsdk.git`
   - The first time you clone, you'll need to install the appropriate SDK version with `./emsdk install 3.1.43` and then activate it with `./emsdk activate 3.1.43`. On Windows, use `./emsdk/emsdk.ps1` instead.

bacon.toml

@@ -34,30 +34,6 @@ command = [
 need_stdout = true
 analyzer = "nextest"
 
-[jobs.coverage]
-command = [
-    "just", "report-coverage"
-]
-need_stdout = true
-ignored_lines = [
-    "info:",
-    "\\s+Compiling",
-    "test result: ok",
-    "^\\s*$",
-    "running \\d+ test",
-    "Nextest run ID",
-    "[─]+",
-    "test.+ok",
-    "PASS|START",
-    "Starting \\d+ test",
-    "\\s*#",
-    "\\s*Finished.+in \\d+",
-    "\\s*Summary\\s+\\[",
-    "\\s*Blocking",
-    "Finished report saved to"
-]
-on_change_strategy = "wait_then_restart"
-
 [jobs.doc]
 command = ["cargo", "doc", "--no-deps"]
 need_stdout = false
@@ -83,4 +59,3 @@ c = "job:clippy"
 alt-c = "job:check"
 ctrl-alt-c = "job:check-all"
 shift-c = "job:clippy-all"
-f = "job:coverage"

build.rs

@@ -1,50 +0,0 @@
-use std::collections::HashMap;
-use std::env;
-use std::fs::File;
-use std::io::{BufWriter, Write};
-use std::path::Path;
-
-use serde::Deserialize;
-
-#[derive(Debug, Deserialize)]
-struct AtlasMapper {
-    frames: HashMap<String, MapperFrame>,
-}
-
-#[derive(Copy, Clone, Debug, Deserialize)]
-struct MapperFrame {
-    x: u16,
-    y: u16,
-    width: u16,
-    height: u16,
-}
-
-fn main() {
-    let path = Path::new(&env::var("OUT_DIR").unwrap()).join("atlas_data.rs");
-    let mut file = BufWriter::new(File::create(&path).unwrap());
-
-    let atlas_json = include_str!("./assets/game/atlas.json");
-    let atlas_mapper: AtlasMapper = serde_json::from_str(atlas_json).unwrap();
-
-    writeln!(&mut file, "use phf::phf_map;").unwrap();
-
-    writeln!(&mut file, "use crate::texture::sprite::MapperFrame;").unwrap();
-
-    writeln!(
-        &mut file,
-        "pub static ATLAS_FRAMES: phf::Map<&'static str, MapperFrame> = phf_map! {{"
-    )
-    .unwrap();
-
-    for (name, frame) in atlas_mapper.frames {
-        writeln!(
-            &mut file,
-            "    \"{}\" => MapperFrame {{ x: {}, y: {}, width: {}, height: {} }},",
-            name, frame.x, frame.y, frame.width, frame.height
-        )
-        .unwrap();
-    }
-
-    writeln!(&mut file, "}};").unwrap();
-    println!("cargo:rerun-if-changed=assets/game/atlas.json");
-}

rust-toolchain.toml

@@ -1,4 +1,3 @@
 [toolchain]
-# we are unfortunately pinned to 1.86.0 for some reason, bulk-memory-opt related issues on wasm32-unknown-emscripten
 channel = "1.86.0"
 components = ["rustfmt", "llvm-tools-preview", "clippy"]

src/app.rs

@@ -1,10 +1,12 @@
 use std::time::{Duration, Instant};
 
 use glam::Vec2;
-use sdl2::render::TextureCreator;
-use sdl2::ttf::Sdl2TtfContext;
-use sdl2::video::WindowContext;
-use sdl2::{AudioSubsystem, EventPump, Sdl, VideoSubsystem};
+use sdl2::event::{Event, WindowEvent};
+use sdl2::keyboard::Keycode;
+use sdl2::render::{Canvas, ScaleMode, Texture, TextureCreator};
+use sdl2::video::{Window, WindowContext};
+use sdl2::EventPump;
+use tracing::{error, event};
 
 use crate::error::{GameError, GameResult};
 
@@ -12,28 +14,26 @@ use crate::constants::{CANVAS_SIZE, LOOP_TIME, SCALE};
 use crate::game::Game;
 use crate::platform::get_platform;
 
-pub struct App {
-    pub game: Game,
+pub struct App<'a> {
+    game: Game,
+    canvas: Canvas<Window>,
+    event_pump: EventPump,
+    backbuffer: Texture<'a>,
+    paused: bool,
     last_tick: Instant,
-    focused: bool,
-    _cursor_pos: Vec2,
+    cursor_pos: Vec2,
 }
 
-impl App {
+impl App<'_> {
     pub fn new() -> GameResult<Self> {
-        let sdl_context: &'static Sdl = Box::leak(Box::new(sdl2::init().map_err(|e| GameError::Sdl(e.to_string()))?));
-        let video_subsystem: &'static VideoSubsystem =
-            Box::leak(Box::new(sdl_context.video().map_err(|e| GameError::Sdl(e.to_string()))?));
-        let _audio_subsystem: &'static AudioSubsystem =
-            Box::leak(Box::new(sdl_context.audio().map_err(|e| GameError::Sdl(e.to_string()))?));
-        let _ttf_context: &'static Sdl2TtfContext =
-            Box::leak(Box::new(sdl2::ttf::init().map_err(|e| GameError::Sdl(e.to_string()))?));
-        let event_pump: &'static mut EventPump =
-            Box::leak(Box::new(sdl_context.event_pump().map_err(|e| GameError::Sdl(e.to_string()))?));
-
         // Initialize platform-specific console
         get_platform().init_console()?;
 
+        let sdl_context = sdl2::init().map_err(|e| GameError::Sdl(e.to_string()))?;
+        let video_subsystem = sdl_context.video().map_err(|e| GameError::Sdl(e.to_string()))?;
+        let audio_subsystem = sdl_context.audio().map_err(|e| GameError::Sdl(e.to_string()))?;
+        let ttf_context = sdl2::ttf::init().map_err(|e| GameError::Sdl(e.to_string()))?;
+
         let window = video_subsystem
             .window(
                 "Pac-Man",
@@ -45,28 +45,37 @@ impl App {
             .build()
             .map_err(|e| GameError::Sdl(e.to_string()))?;
 
-        let canvas = Box::leak(Box::new(
-            window
-                .into_canvas()
-                .accelerated()
-                .build()
-                .map_err(|e| GameError::Sdl(e.to_string()))?,
-        ));
-
+        let mut canvas = window.into_canvas().build().map_err(|e| GameError::Sdl(e.to_string()))?;
         canvas
             .set_logical_size(CANVAS_SIZE.x, CANVAS_SIZE.y)
             .map_err(|e| GameError::Sdl(e.to_string()))?;
 
-        let texture_creator: &'static mut TextureCreator<WindowContext> = Box::leak(Box::new(canvas.texture_creator()));
+        let texture_creator_static: &'static TextureCreator<WindowContext> = Box::leak(Box::new(canvas.texture_creator()));
 
-        let game = Game::new(canvas, texture_creator, event_pump)?;
-        // game.audio.set_mute(cfg!(debug_assertions));
+        let mut game = Game::new(texture_creator_static, &ttf_context, &audio_subsystem)?;
+        game.audio.set_mute(cfg!(debug_assertions));
 
-        Ok(App {
+        let mut backbuffer = texture_creator_static
+            .create_texture_target(None, CANVAS_SIZE.x, CANVAS_SIZE.y)
+            .map_err(|e| GameError::Sdl(e.to_string()))?;
+        backbuffer.set_scale_mode(ScaleMode::Nearest);
+
+        let event_pump = sdl_context.event_pump().map_err(|e| GameError::Sdl(e.to_string()))?;
+
+        // Initial draw
+        game.draw(&mut canvas, &mut backbuffer)
+            .map_err(|e| GameError::Sdl(e.to_string()))?;
+        game.present_backbuffer(&mut canvas, &backbuffer, glam::Vec2::ZERO)
+            .map_err(|e| GameError::Sdl(e.to_string()))?;
+
+        Ok(Self {
             game,
-            focused: true,
+            canvas,
+            event_pump,
+            backbuffer,
+            paused: false,
             last_tick: Instant::now(),
-            _cursor_pos: Vec2::ZERO,
+            cursor_pos: Vec2::ZERO,
         })
     }
 
@@ -74,46 +83,78 @@ impl App {
         {
             let start = Instant::now();
 
-            // for event in self
-            //     .game
-            //     .world
-            //     .get_non_send_resource_mut::<&'static mut EventPump>()
-            //     .unwrap()
-            //     .poll_iter()
-            // {
-            //     match event {
-            //         Event::Window { win_event, .. } => match win_event {
-            //             WindowEvent::FocusGained => {
-            //                 self.focused = true;
-            //             }
-            //             WindowEvent::FocusLost => {
-            //                 self.focused = false;
-            //             }
-            //             _ => {}
-            //         },
-            //         Event::MouseMotion { x, y, .. } => {
-            //             // Convert window coordinates to logical coordinates
-            //             self.cursor_pos = Vec2::new(x as f32, y as f32);
-            //         }
-            //         _ => {}
-            //     }
-            // }
+            for event in self.event_pump.poll_iter() {
+                match event {
+                    Event::Window { win_event, .. } => match win_event {
+                        WindowEvent::Hidden => {
+                            event!(tracing::Level::DEBUG, "Window hidden");
+                        }
+                        WindowEvent::Shown => {
+                            event!(tracing::Level::DEBUG, "Window shown");
+                        }
+                        _ => {}
+                    },
+                    // It doesn't really make sense to have this available in the browser
+                    #[cfg(not(target_os = "emscripten"))]
+                    Event::Quit { .. }
+                    | Event::KeyDown {
+                        keycode: Some(Keycode::Escape) | Some(Keycode::Q),
+                        ..
+                    } => {
+                        event!(tracing::Level::INFO, "Exit requested. Exiting...");
+                        return false;
+                    }
+                    Event::KeyDown {
+                        keycode: Some(Keycode::P),
+                        ..
+                    } => {
+                        self.paused = !self.paused;
+                        event!(tracing::Level::INFO, "{}", if self.paused { "Paused" } else { "Unpaused" });
+                    }
+                    Event::KeyDown {
+                        keycode: Some(Keycode::Space),
+                        ..
+                    } => {
+                        self.game.debug_mode = !self.game.debug_mode;
+                    }
+                    Event::KeyDown { keycode: Some(key), .. } => {
+                        self.game.keyboard_event(key);
+                    }
+                    Event::MouseMotion { x, y, .. } => {
+                        // Convert window coordinates to logical coordinates
+                        self.cursor_pos = Vec2::new(x as f32, y as f32);
+                    }
+                    _ => {}
+                }
+            }
 
             let dt = self.last_tick.elapsed().as_secs_f32();
             self.last_tick = Instant::now();
 
-            let exit = self.game.tick(dt);
-
-            if exit {
-                return false;
+            if !self.paused {
+                self.game.tick(dt);
+                if let Err(e) = self.game.draw(&mut self.canvas, &mut self.backbuffer) {
+                    error!("Failed to draw game: {}", e);
+                }
+                if let Err(e) = self
+                    .game
+                    .present_backbuffer(&mut self.canvas, &self.backbuffer, self.cursor_pos)
+                {
+                    error!("Failed to present backbuffer: {}", e);
+                }
             }
 
-            // Sleep if we still have time left
             if start.elapsed() < LOOP_TIME {
                 let time = LOOP_TIME.saturating_sub(start.elapsed());
                 if time != Duration::ZERO {
-                    get_platform().sleep(time, self.focused);
+                    get_platform().sleep(time);
                 }
+            } else {
+                event!(
+                    tracing::Level::WARN,
+                    "Game loop behind schedule by: {:?}",
+                    start.elapsed() - LOOP_TIME
+                );
             }
 
             true

src/asset.rs

@@ -3,16 +3,28 @@
 //! On desktop, assets are embedded using include_bytes!; on Emscripten, assets are loaded from the filesystem.
 
 use std::borrow::Cow;
-use strum_macros::EnumIter;
+use std::io;
+use thiserror::Error;
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, EnumIter)]
+#[derive(Error, Debug)]
+pub enum AssetError {
+    #[error("IO error: {0}")]
+    Io(#[from] io::Error),
+    #[error("Asset not found: {0}")]
+    NotFound(String),
+    #[error("Invalid asset format: {0}")]
+    InvalidFormat(String),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub enum Asset {
     Wav1,
     Wav2,
     Wav3,
     Wav4,
-    AtlasImage,
-    Font,
+    Atlas,
+    AtlasJson,
+    // Add more as needed
 }
 
 impl Asset {
@@ -24,18 +36,16 @@ impl Asset {
             Wav2 => "sound/waka/2.ogg",
             Wav3 => "sound/waka/3.ogg",
             Wav4 => "sound/waka/4.ogg",
-            AtlasImage => "atlas.png",
-            Font => "TerminalVector.ttf",
+            Atlas => "atlas.png",
+            AtlasJson => "atlas.json",
         }
     }
 }
 
 mod imp {
     use super::*;
-    use crate::error::AssetError;
     use crate::platform::get_platform;
 
-    /// Returns the raw bytes of the given asset.
     pub fn get_asset_bytes(asset: Asset) -> Result<Cow<'static, [u8]>, AssetError> {
         get_platform().get_asset_bytes(asset)
     }

src/constants.rs

@@ -18,6 +18,8 @@ pub const SCALE: f32 = 2.6;
 pub const BOARD_CELL_OFFSET: UVec2 = UVec2::new(0, 3);
 /// The offset of the game board from the top-left corner of the window, in pixels.
 pub const BOARD_PIXEL_OFFSET: UVec2 = UVec2::new(BOARD_CELL_OFFSET.x * CELL_SIZE, BOARD_CELL_OFFSET.y * CELL_SIZE);
+/// The size of the game board, in pixels.
+pub const BOARD_PIXEL_SIZE: UVec2 = UVec2::new(BOARD_CELL_SIZE.x * CELL_SIZE, BOARD_CELL_SIZE.y * CELL_SIZE);
 /// The size of the canvas, in pixels.
 pub const CANVAS_SIZE: UVec2 = UVec2::new(
     (BOARD_CELL_SIZE.x + BOARD_CELL_OFFSET.x) * CELL_SIZE,

src/entity/collision.rs

@@ -1,128 +1,128 @@
-// use smallvec::SmallVec;
-// use std::collections::HashMap;
+use smallvec::SmallVec;
+use std::collections::HashMap;
 
-// use crate::entity::{graph::NodeId, traversal::Position};
+use crate::entity::traversal::Position;
 
-// /// Trait for entities that can participate in collision detection.
-// pub trait Collidable {
-//     /// Returns the current position of this entity.
-//     fn position(&self) -> Position;
+/// Trait for entities that can participate in collision detection.
+pub trait Collidable {
+    /// Returns the current position of this entity.
+    fn position(&self) -> Position;
 
-//     /// Checks if this entity is colliding with another entity.
-//     #[allow(dead_code)]
-//     fn is_colliding_with(&self, other: &dyn Collidable) -> bool {
-//         positions_overlap(&self.position(), &other.position())
-//     }
-// }
+    /// Checks if this entity is colliding with another entity.
+    #[allow(dead_code)]
+    fn is_colliding_with(&self, other: &dyn Collidable) -> bool {
+        positions_overlap(&self.position(), &other.position())
+    }
+}
 
-// /// System for tracking entities by their positions for efficient collision detection.
-// #[derive(Default)]
-// pub struct CollisionSystem {
-//     /// Maps node IDs to lists of entity IDs that are at that node
-//     node_entities: HashMap<NodeId, Vec<EntityId>>,
-//     /// Maps entity IDs to their current positions
-//     entity_positions: HashMap<EntityId, Position>,
-//     /// Next available entity ID
-//     next_id: EntityId,
-// }
+/// System for tracking entities by their positions for efficient collision detection.
+#[derive(Default)]
+pub struct CollisionSystem {
+    /// Maps node IDs to lists of entity IDs that are at that node
+    node_entities: HashMap<usize, Vec<EntityId>>,
+    /// Maps entity IDs to their current positions
+    entity_positions: HashMap<EntityId, Position>,
+    /// Next available entity ID
+    next_id: EntityId,
+}
 
-// /// Unique identifier for an entity in the collision system
-// pub type EntityId = u32;
+/// Unique identifier for an entity in the collision system
+pub type EntityId = u32;
 
-// impl CollisionSystem {
-//     /// Registers an entity with the collision system and returns its ID
-//     pub fn register_entity(&mut self, position: Position) -> EntityId {
-//         let id = self.next_id;
-//         self.next_id += 1;
+impl CollisionSystem {
+    /// Registers an entity with the collision system and returns its ID
+    pub fn register_entity(&mut self, position: Position) -> EntityId {
+        let id = self.next_id;
+        self.next_id += 1;
 
-//         self.entity_positions.insert(id, position);
-//         self.update_node_entities(id, position);
+        self.entity_positions.insert(id, position);
+        self.update_node_entities(id, position);
 
-//         id
-//     }
+        id
+    }
 
-//     /// Updates an entity's position
-//     pub fn update_position(&mut self, entity_id: EntityId, new_position: Position) {
-//         if let Some(old_position) = self.entity_positions.get(&entity_id) {
-//             // Remove from old nodes
-//             self.remove_from_nodes(entity_id, *old_position);
-//         }
+    /// Updates an entity's position
+    pub fn update_position(&mut self, entity_id: EntityId, new_position: Position) {
+        if let Some(old_position) = self.entity_positions.get(&entity_id) {
+            // Remove from old nodes
+            self.remove_from_nodes(entity_id, *old_position);
+        }
 
-//         // Update position and add to new nodes
-//         self.entity_positions.insert(entity_id, new_position);
-//         self.update_node_entities(entity_id, new_position);
-//     }
+        // Update position and add to new nodes
+        self.entity_positions.insert(entity_id, new_position);
+        self.update_node_entities(entity_id, new_position);
+    }
 
-//     /// Removes an entity from the collision system
-//     #[allow(dead_code)]
-//     pub fn remove_entity(&mut self, entity_id: EntityId) {
-//         if let Some(position) = self.entity_positions.remove(&entity_id) {
-//             self.remove_from_nodes(entity_id, position);
-//         }
-//     }
+    /// Removes an entity from the collision system
+    #[allow(dead_code)]
+    pub fn remove_entity(&mut self, entity_id: EntityId) {
+        if let Some(position) = self.entity_positions.remove(&entity_id) {
+            self.remove_from_nodes(entity_id, position);
+        }
+    }
 
-//     /// Gets all entity IDs at a specific node
-//     pub fn entities_at_node(&self, node: NodeId) -> &[EntityId] {
-//         self.node_entities.get(&node).map(|v| v.as_slice()).unwrap_or(&[])
-//     }
+    /// Gets all entity IDs at a specific node
+    pub fn entities_at_node(&self, node: usize) -> &[EntityId] {
+        self.node_entities.get(&node).map(|v| v.as_slice()).unwrap_or(&[])
+    }
 
-//     /// Gets all entity IDs that could collide with an entity at the given position
-//     pub fn potential_collisions(&self, position: &Position) -> Vec<EntityId> {
-//         let mut collisions = Vec::new();
-//         let nodes = get_nodes(position);
+    /// Gets all entity IDs that could collide with an entity at the given position
+    pub fn potential_collisions(&self, position: &Position) -> Vec<EntityId> {
+        let mut collisions = Vec::new();
+        let nodes = get_nodes(position);
 
-//         for node in nodes {
-//             collisions.extend(self.entities_at_node(node));
-//         }
+        for node in nodes {
+            collisions.extend(self.entities_at_node(node));
+        }
 
-//         // Remove duplicates
-//         collisions.sort_unstable();
-//         collisions.dedup();
-//         collisions
-//     }
+        // Remove duplicates
+        collisions.sort_unstable();
+        collisions.dedup();
+        collisions
+    }
 
-//     /// Updates the node_entities map when an entity's position changes
-//     fn update_node_entities(&mut self, entity_id: EntityId, position: Position) {
-//         let nodes = get_nodes(&position);
-//         for node in nodes {
-//             self.node_entities.entry(node).or_default().push(entity_id);
-//         }
-//     }
+    /// Updates the node_entities map when an entity's position changes
+    fn update_node_entities(&mut self, entity_id: EntityId, position: Position) {
+        let nodes = get_nodes(&position);
+        for node in nodes {
+            self.node_entities.entry(node).or_default().push(entity_id);
+        }
+    }
 
-//     /// Removes an entity from all nodes it was previously at
-//     fn remove_from_nodes(&mut self, entity_id: EntityId, position: Position) {
-//         let nodes = get_nodes(&position);
-//         for node in nodes {
-//             if let Some(entities) = self.node_entities.get_mut(&node) {
-//                 entities.retain(|&id| id != entity_id);
-//                 if entities.is_empty() {
-//                     self.node_entities.remove(&node);
-//                 }
-//             }
-//         }
-//     }
-// }
+    /// Removes an entity from all nodes it was previously at
+    fn remove_from_nodes(&mut self, entity_id: EntityId, position: Position) {
+        let nodes = get_nodes(&position);
+        for node in nodes {
+            if let Some(entities) = self.node_entities.get_mut(&node) {
+                entities.retain(|&id| id != entity_id);
+                if entities.is_empty() {
+                    self.node_entities.remove(&node);
+                }
+            }
+        }
+    }
+}
 
-// /// Checks if two positions overlap (entities are at the same location).
-// fn positions_overlap(a: &Position, b: &Position) -> bool {
-//     let a_nodes = get_nodes(a);
-//     let b_nodes = get_nodes(b);
+/// Checks if two positions overlap (entities are at the same location).
+fn positions_overlap(a: &Position, b: &Position) -> bool {
+    let a_nodes = get_nodes(a);
+    let b_nodes = get_nodes(b);
 
-//     // Check if any nodes overlap
-//     a_nodes.iter().any(|a_node| b_nodes.contains(a_node))
+    // Check if any nodes overlap
+    a_nodes.iter().any(|a_node| b_nodes.contains(a_node))
 
-//     // TODO: More complex overlap detection, the above is a simple check, but it could become an early filter for more precise calculations later
-// }
+    // TODO: More complex overlap detection, the above is a simple check, but it could become an early filter for more precise calculations later
+}
 
-// /// Gets all nodes that an entity is currently at or between.
-// fn get_nodes(pos: &Position) -> SmallVec<[NodeId; 2]> {
-//     let mut nodes = SmallVec::new();
-//     match pos {
-//         Position::AtNode(node) => nodes.push(*node),
-//         Position::BetweenNodes { from, to, .. } => {
-//             nodes.push(*from);
-//             nodes.push(*to);
-//         }
-//     }
-//     nodes
-// }
+/// Gets all nodes that an entity is currently at or between.
+fn get_nodes(pos: &Position) -> SmallVec<[usize; 2]> {
+    let mut nodes = SmallVec::new();
+    match pos {
+        Position::AtNode(node) => nodes.push(*node),
+        Position::BetweenNodes { from, to, .. } => {
+            nodes.push(*from);
+            nodes.push(*to);
+        }
+    }
+    nodes
+}

src/entity/direction.rs

@@ -1,13 +1,11 @@
 use glam::IVec2;
 
 /// The four cardinal directions.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
-#[repr(usize)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Direction {
     Up,
     Down,
     Left,
-    #[default]
     Right,
 }