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Sorry for the multiple partial postings (I accidentally tried to use the tab key in the posting and that selects the 'Post' button, where I must have hit 'Enter' a couple of times). I forgot to mention that the code above should be in an act() method or in a method that an act() method calls.

<Code Omitted>Also, this might work:

Technically speaking an image comprises part of the state of an actor, so the answer would be yes! You can use the getImage() method to grab the current image on the actor, and then take an action based on what image it is. However, using the current image of the actor to determine what state it's in isn't necessarily the best idea because it couples each image to a certain state, without the possibility of changing it later (without refactoring the code.) You may be better to store the "state" that you want separately, such as in an integer - and then use an if statement over that integer

I just woke up... glad to hear it's sorted.

ok, finally the scenario works.. thanks for the help davmac!

Do you mean as in a Space Invaders type of game? I'm not aware of any "official" Greenfoot version but there are a few on the gallery - type "invaders" into the search box (top of this page) and you'll see them.

Thanks davmac, I just realized that I could Save as a copy in other location and start editing it there. As you say, RTFM :)

what kind of game do you want to make

You will find what you need here.

There is a method in Class Actor called getOneIntersectingObject and several others that might fit your situation. You can use these methods to sense when one object intersects another. Maybe make a method based on the ever popular crab scenario's canSee method, whose code is downloadable (although they usually use the less useful getOneObjectAtOffset). My game, PyroTyro, uses the first method. The code is available; just open the House class. After one car "canSee" another (they collide), you can remove both of their images and replace them with a crunched up car image, just as I have rep

Sorry - You just do it normally!

Thnaks a lot for your replies, I was thinking in an array of images like davmac said. I'm not sure if there is a difference in usgin == or equals but the use of equals sounds more for usefull for Strings. Thanks a lot for the tips Duta and davmac!!!

Indeed, the code above contains the same bug. Line 04 should be removed, because setLocation(...) already takes cell size into account. That is an issue with accuracy of position; you can fix it by moving in larger increments, or by using the SmoothMover class. It won't be "fixed" in the next release because it's arguably not a bug.