dirty initial commit

game/BoundingRectangle.js

@@ -0,0 +1,46 @@
+import Point from './Point.js'
+
+export default class BoundingRectangle {
+    constructor(x0, x1, y0, y1) {
+        this.x0 = x0
+        this.x1 = x1
+        this.y0 = y0
+        this.y1 = y1
+        this.width = (x1 - x0) + 1
+        this.height = (y1 - y0) + 1
+    }
+
+    div(d) {
+        this.x0 /= d
+        this.x1 /= d
+        this.y0 /= d
+        this.y1 /= d
+    }
+    
+    move(x, y) {
+        this.x0 += x
+        this.x1 += x
+        this.y0 += y
+        this.y1 += y
+    }
+    
+    moved(x, y) {
+        return new BoundingRectangle(
+            this.x0 + x,
+            this.x1 + x,
+            this.y0 + y,
+            this.y1 + y
+        )
+    }
+
+    center() {
+        return new Point(
+            this.x0 + this.width / 2,
+            this.y0 + this.height / 2,
+        )
+    }
+    
+    centerDistance(other) {
+        return this.center().distance(other.center())
+    }
+}