From 6bf4b90c90f15f4ab60833bddf5b5756d1a6b1f6 Mon Sep 17 00:00:00 2001
From: Elizabeth Alexander Hunt <me@liz.coffee>
Date: Thu, 2 Jul 2026 11:55:17 -0700
Subject: Init

---
 Homework/cs5410/bbiy/src/game.js | 72 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 Homework/cs5410/bbiy/src/game.js

(limited to 'Homework/cs5410/bbiy/src/game.js')

diff --git a/Homework/cs5410/bbiy/src/game.js b/Homework/cs5410/bbiy/src/game.js
new file mode 100644
index 0000000..5a7e391
--- /dev/null
+++ b/Homework/cs5410/bbiy/src/game.js
@@ -0,0 +1,72 @@
+game.loop = (timeStamp) => {
+  if (!game.running) {
+    return;
+  }  
+
+  let elapsedTime = timeStamp - game.lastTimeStamp;
+  game.lastTimeStamp = timeStamp;
+
+  const changedIds = new Set();
+  game.systemOrder.map((i) => {
+    game.systems[i]
+      .update(elapsedTime, game.entities, changedIds)
+      .forEach((id) => changedIds.add(id));
+  });
+
+  for (let id in game.entities) {
+    if (game.entities[id].hasComponent("particles") && !game.entities[id].hasComponent("alive")) {
+      delete game.entities[id];
+    }
+  }
+
+  requestAnimationFrame(game.loop);
+};
+
+game.toggleRunning = () => {
+  game.running = !game.running;
+};
+
+game.startLoop = () => {
+  game.running = true;
+  game.lastTimeStamp = performance.now();
+  game.assets.music.play();
+  if (game.assets.music.paused) {
+    alert("Failed to start background music; please allow autoplay in your browser settings.");
+  }
+  requestAnimationFrame(game.loop);
+};
+
+game.loadSystems = () => {
+  game.systemOrder = ["grid", "collision", "physics", "keyboardInput", "particle", "logic", "undo", "render"];
+  game.systems = { };
+  game.systems.physics = game.system.Physics(),
+  game.systems.grid = game.system.Grid(game.entitiesGrid);
+  game.systems.collision = game.system.Collision(game.entitiesGrid);
+  game.systems.render = game.system.Render(game.graphics);
+  game.systems.particle = game.system.Particle(game.canvas.context);
+  game.systems.keyboardInput = game.system.KeyboardInput();
+  game.systems.logic = game.system.Logic(game.entitiesGrid);
+  game.systems.undo = game.system.Undo(game.entitiesGrid, game.systems.logic, game.systems.grid);  
+  game.systems.menu = game.system.Menu();
+};
+
+game.loadLevelIndex = (level) => {
+  game.win = false;  
+
+  game.level = level;
+  [game.entities, game.config] = game.loadLevel(game.levels[game.level]);
+
+  // Maintained by grid system as a side-effect
+  game.entitiesGrid = Array(game.config.yDim).fill(null).map(() => Array(game.config.xDim).fill(null).map(() => new Map()));
+  game.loadSystems();
+};
+
+game.initialize = () => {
+  game.assets.music.addEventListener('ended', function() {
+    this.currentTime = 0;
+    this.play();
+  }, false);
+
+  game.loadLevelIndex(0);
+  game.startLoop();
+};
-- 
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