Improved Collision

javascript/flapping.js

@@ -117,7 +117,24 @@ function stopFlappingBackgound(name) {
 
 //Parameters are rects
 function isOverlap(e1, e2) {
-    return (e1.top <= e2.bottom && e2.top <= e1.bottom && e1.right >= e2.left && e1.left <= e2.right);
+    rect1 = {
+        x:e1.left+e1.width/2,
+        y:e1.bottom+e1.height/2,
+        width:e1.width,
+        height:e1.height,
+    };
+    rect2 = {
+        x:e2.left+e2.width/2,
+        y:e2.bottom+e2.height/2,
+        width:e2.width,
+        height:e2.height,
+    };
+    if (rect1.x < rect2.x + rect2.width &&
+   rect1.x + rect1.width > rect2.x &&
+   rect1.y < rect2.y + rect2.height &&
+   rect1.height + rect1.y > rect2.y)
+        return true;
+    else return false;
 }
 
 function onCollision(){