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/systems/physics.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 Homework/cs5410/bbiy/src/systems/physics.js

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

diff --git a/Homework/cs5410/bbiy/src/systems/physics.js b/Homework/cs5410/bbiy/src/systems/physics.js
new file mode 100644
index 0000000..18c3cb3
--- /dev/null
+++ b/Homework/cs5410/bbiy/src/systems/physics.js
@@ -0,0 +1,16 @@
+game.system.Physics = () => {
+  const update = (elapsedTime, entities, changedIds) => {
+    for (let id in entities) {
+      const entity = entities[id];
+      if (entity.hasComponent("momentum") && entity.hasComponent("appearance")) {
+        const {dx, dy} = entity.components.momentum;
+        entity.components.position.x += dx * elapsedTime;
+        entity.components.position.y += dy * elapsedTime;
+        entity.components.position = clamp(entity.components.position, game.canvas.width - entity.components.appearance.width, game.canvas.height - entity.components.appearance.height);
+      }
+    }
+
+    return new Set();
+  };
+  return { update };
+};
-- 
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