in range detection

Use the Actor class 'getObjectsInRange' method and if the list returned is not empty, use the distance formula to determine the closest object listed, and fire in its direction. Wrap the above with a timer so that you do not spray bullets. You should have a field for the maximum range value so different towers can have different ranges.

Got another problem now. and it is anoying the shooting and follow og range is working. but cant remove the arrow we shot for the tower when it hits the enemy code: public void death() { Level1 lvl1=(Level1)getWorld(); if(getOneIntersectingObject(ArrowBullet.class) !=null) { getWorld().removeObject(this); getWorld().removeObject(ArrowBullet.class); lvl1.addGold(plusGold); } it is written in the enemy and that part works:) please help:)

The World 'getObject' method needs a specific actor to remove from the world, not just a class. Also, you need to remove the Arrow object before removing the enemy; although, you could just use 'lvl1.removeObject(...)' (in your second 'removeObect' line, 'getWorld' will return 'null' and you will throw a NullPointerException because you have removed the actor from the world in the first 'removeObject' line, so it has no World). There are 'isTouching' and 'removeTouching' methods in Actor that you can use for this:

You will probably end up with problems later when you add more levels. The line 'Level1 lvl1 = (Level1)getWorld();' will throw a casting exception (you cannot cast a 'Level2' world to type 'Level1').

tanks:) that fiksed one thing know we get this error message java.lang.IllegalStateException: Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed. and it comes from this line of code. if (isTouching(ArrowBullet.class)) the hole metode looks like this. public void death() { Level1 lvl1=(Level1)getWorld(); if (isTouching(ArrowBullet.class)) { removeTouching(ArrowBullet.class); lvl1.removeObject(this); lvl1.spawnDecrease(spawnD); lvl1.addGold(plusGold); } }