Discussions

You probably want to look at the getObjectsInRange method which will allow you to get a list of all the objects a certain radius (or closer) away from the actor.

Well if it has objects in the way that makes it a bit more complicated. You could keep track of your position by judging how much you've turned / travelled then work out from that if something you've hit is a likely edge or obstacle. That might give you a starting point. With these sorts of problems it's often easier to map out your logic on paper first, then turn it into code later.

The short answer is likely if you have to ask the question, then you're probably not at a stage where you can implement it. It is indeed impressive and a nice piece of coding, but any 3D or iso-3D like worlds you see in Greenfoot have had the 3D in them coded by hand, it's not something that's built into Greenfoot at all! Of course, this doesn't mean you can't look at the source code, try to gain an understanding of it and learn from it :)

I changed it to double and it no longer has an error, disregard this :D.

I think ill use davmac's idea. @danpost, you remember that scenario you downloaded to take a look at the code? It's that scenario.

Yeah that was it, I opened from a read-only. Thank you very much

Yes，I am. I've joined greenroom yet,but it seems only be some demos there , and I dont know how to use those cases to my class.

I have solved the question but i got a new question how can i get a signal that if the import file by scanner does not exist or the content in the file is not in correct order/format. i do not mean the immediate window will give out warnings but i want a method that will return boolean when the above error occur or not.

Thanks davmac.

10 cells up from the actor you call it from

You made a void method, the fact that it is returning nothing is a good thing :D Did you mean to say perhaps that nothing is being printed out?

very true!! thanks so much

Well: - The interface isn't called Test, it's called PointingDevice - It doesn't have a getDuration() method - It doesn't have a check() method - It doesn't have a getScore() method ...I'm not sure there's a lot to go on to help you there!

Just posted a connect 4 in progress scenarios that uses buttons the way you want, i put the code up , the squares on the board are effectively buttons. The buttons light up when the mouse moves over a particular legal square and when you click on a particular square a coin is placed in the square.. Note also when you enter a coin the square above that coin becomes active.