I recently started learning greenfoot, so it is pretty basic: public void act() { checkKeyPress(); } /** * This will check to see if a key has been pressed. If the left arrow is pressed, the turret * will rotate counterclockwise. If the right arrow is pressed, the turret will turn clockwise. */ public void checkKeyPress() { if (Greenfoot.isKeyDown("left")) { turn(-5); } if (Greenfoot.isKeyDown("right")) { turn(5); } }//end method And then this is what I thought I could start to work with for creating the limit: public int getRotation()

You just need a double check for each out of bounds range: Apply this code immediately after any change in the rotation of the turret.

There is another way to handle it which would make the code a bit easier. Rotate the image of the turret 180 degrees and set the initial rotation of the actor to 180 degrees. Then your 'checkKeyPress' method could be: You may have to set the rotation of any bullets from the turret to 180 degrees more than you have it now.

I suppose, but its nowhere near finished, probably not for another month or so, I don't get much time to work on it during the day. By the way, danpost, when I set the initial rotation of the actor to 180 degrees, I can set that up in the constructor, correct?

Yes. Either 'turn(180);' or 'setRotation(180);' can be used in the constructor. You may want to read the following before continuing. As a third alternative, you could save the rotation of the turret in an instance field. This would, however, result in a two step process in the 'if' blocks as follows: With this, there is no initial rotating of the image or the actor; and the rotation of the bullet can remain as is. In fact, you can initially set 'rotation' to any value (adjusting the '90' and '-90' values by adding the initial value of 'rotation'). Setting it to the value of the initial rotation a bullet would travel would be an added plus; as you can then just set the rotation of any new bullet to the current value of 'rotation', as any adjustment would already be made. Hope I am not confusing you.

I get most of what you're saying, I like this third option, while I am glad I can understand most of what is going on, I am bummed I can't figure it out for myself. The only part I am not sure about is the following code (the bolded part): turn(5) rotation += 5; Is that line of code suppose to be a mutator for the instance field? If not, what's its purpose? Also, do you have an email I can contact you at? If it won't be a bother for your, I will have more questions as I work on this. Thanks again for your help!

The statement 'rotation += 5;' is the same thing as 'rotation = rotation + 5;. Since we are turning the actor plus five degrees, we want our rotation field to adjust by that same amount so we know the new bullet rotation value.