Three types of collision and a polygon class

collision/aa.ts

@@ -0,0 +1,16 @@
+import { Point } from "../geometry/vector.ts";
+
+export type axisAlignedBoundingBox = {
+  w: number;
+  h: number;
+} & Point;
+
+export const axisAlignedCollision = (
+  aa1: axisAlignedBoundingBox,
+  aa2: axisAlignedBoundingBox,
+) => {
+  return aa1.x < aa2.x + aa2.w &&
+    aa1.x + aa1.w > aa2.x &&
+    aa1.y < aa2.y + aa2.h &&
+    aa1.y + aa1.h > aa2.y;
+};