Discussions

In the object that you can click, you put this in the 'act' method: <Code Omitted>With 'clock' as the reference to the clock object. Maybe you save the reference in the world. Then you need to use this reference. In this case, the 'Clock' class needs to have a method called 'add'. Try it yourself as far as you can and then tell us with what exactly you need help.

Okay thankyou ill start from scratch

Alright. I just found it out by chance. Btw, @davmac, did you see this thread? I hoped for an official statement there :) http://www.greenfoot.org/topics/find/44287

@Spock, to possibly save time in resolving problems, from now on, please show the entire error message using copy/paste operations. Showing the trace thread with the error message would have pointed us to exactly what was going on immediately (instead of searching through the code to find what might be wrong). In fact something as simple as the index '580' (or whatever) at the end of the error message might have helped in itself; but, still, the more information you give, the better.

Thanks for that :)

Break the 'menu' down into simple parts that you can work with. For example, a menu has the following: (a) a background -- with possible texts and/or images; and (b) buttons -- actors that perform specific functions when clicked The menu background can be a world canvas or it can be an actor that is added behind the buttons. I have found that it is easiest the create a separate world for the menus. Having a separate world for the menu keeps it separate from your main world (no need to track objects that need removed due to the menu) and it keeps your main world from running while the

Insufficient data to ascertain. You need to show the block of code that the block given above is enclosed within or, if the block given is the complete code for a method, the block of code that contains the call to this method.

thanks so much danpost, really appreciate the help

IT WORKS! Thanks danpost.

I think you need to review the methods provided in the Greenfoot class documentation and choose a more appropriate method (other than 'isKeyDown').

I do not see any attempt at coding any collision. What have your tried? Things I have noticed: * class names should begin with uppercase characters (by convention) * method names should begin with lowercase characters (by convention) * the setting of the images for your cat, as coded, need to be read from file to create the image and then set every act method the cat moves; this is far from efficient and may cause lag; it would be far better to hold the images in fields and set the cat to the appropriate image only when a change in direction is detected. This means you would need three

Nevermind, I fixed it. I was supposed to check whether rotationDiff was greater than 0, not less than 180. Thanks for all the help guys! :D

Thanks Hippo, that did the trick :)

To call a method that's in the same class, you write the name of the method followed by parentheses containing the parameter values, if any. As 'updateCoords' doesn't have any parameters you can leave the parentheses empty in this case. If you don't understand something I've said, then please ask about it specifically. Writing a method call is so fundamental that you need to learn to do it yourself, so I'm not going to write it for you.