adding 502 error

games/pacman502/js/update.js

@@ -0,0 +1,50 @@
+var playerSpriteTimeout ;
+// Update game objects
+var update = function (modifier) {
+	controls(modifier);
+
+	if (player.dead || isCollidingBlocks(player,player.direction)){
+		clearTimeout(playerSpriteTimeout);
+		player.isMoving = false;
+	} else {
+		if (!player.isMoving) {
+			player.isMoving = true;
+			playerSpriteTimeout = setInterval(function(){
+				player.sprite = (player.sprite +1) %2;
+			}, 250);
+		}
+		move(player, modifier);
+	}
+	updateEnemies(modifier); //AI
+
+	//Enemy collision
+	for (var i= 0; i < enemies.length; i++){
+    var enemy = enemies[i];
+    if (collision.collision(enemy, player, SIZE)) player.dead = true;
+  }
+	//Eating dots
+	for (var i= 0; i < dots.length; i++){
+    var dot = dots[i];
+    if (collision.collision(dot, player, SIZE / 2)) dots.splice(i, 1);
+  }
+};
+
+var move = function(obj, modifier){
+
+  obj.x  = obj.x + obj.direction.x * obj.speed  * modifier;
+  obj.y =  obj.y + obj.direction.y * obj.speed * modifier;
+
+  if (obj.y < 0 ) obj.y = canvas.height;
+  else if (obj.y > canvas.height ) obj.y = 0 ;
+}
+
+var isCollidingBlocks = function(obj, direction, offset){
+	if (!offset) offset = p(0,0);
+		for (var i=0; i < blocks.length; i++){
+		var block = blocks[i];
+
+		var isColliding = collision.isCollidingDirection(block, obj, direction, offset);
+		if (isColliding) return true;
+	}
+	return false;
+}