added Towers loading in level

base_types.h

@@ -72,6 +72,14 @@ struct srcTriggerType
 		onTimer,
 		onAlienInRadius
 	};
+
+	enum aimType
+	{
+		noAim,
+		parentAim,
+		allSide,
+		nearlestAlien
+	};
 	int childId; // =-1 for non birth splash (e.q. only damage)
 	bool delParent;
 	float damage;