Discussions

Use the 'getNeighbours' method in a list iterating for loop -- something like this: <Code Omitted>You will need to be more specific than getting Actor type objects so that you can perform your check on the actors.

It worked. Thanks! I know i'm asking a lot, but could you tell me or guide me on how to get my aliens to move from one side, down, then move to the other? I'll try to upload my game if you need to know what I'm talking about.

Thanks sm

I do not think the Vector class should extend the Actor class -- a vector is NOT an actor (I doubt you saw that in any scenario examples). A vector is an object with two values -- an angle and a length, which is what are needed to describe a vector. The Mover class creates a Vector object to describe the current direction and speed (or 'movement') of the actor. The Mover class should extend the Actor class and the Vector class should extend the Object class (this is implied if no 'extends' clause is given in the class declaration line). Next question: At the beginning of your world cons

There is, I believe, a 20MB limit on uploaded scenarios. There may be some things you can do to reduce the size of your scenario. First, start by remove any and all sound and image files currently in your 'sounds' and 'images' folders of your project folder that are not being used (you may not find you have any to remove -- but so be it). Next, make sure you use the 'jpg' (or 'jpeg') format for images used in the backgrounds of any of your worlds (they use less storage space than other formats). Also, if you can reduce the size of any of your sound files either by cutting their length or u

My Value Display Tutorial shows how to create a displayable timer.

I understood that. I was just wondering why you would create one for no reason at line 7 above.

Does the file have the same name? Maybe it is 'Intro' and not 'Into"? I am not sure how it works in Mac, but you could try to use a file name without a space.

When the scenario is stopped, no code can reactivate it again because no code is executed (after the current act is finished). You can pause the whole scenario using the Greenfoot.delay method.

Thank you very much!!!

Thanks Dan.

Thank you for your help but I have worked it out now, I accidentally had an infinite loop spawning a GUI in the same place so I couldn't tell it was spawning more than once but was causing loads of lag.

Keep in mind that actors leaving the viewable world which are no longer needed should be removed from the world to prevent possible lag.

Line 1 is a field declaration line -- a variable that is declared within a class, but not within a method or constructor (which are just plain variables). Each object created from the class comes with a placeholder for, in this case, an 'int' value called 'rotation' given an initial value of '0'. As 'private', no other class has direct access to the field. The field will exist as long as the object it belongs to exists. A field can be of any of the primary types (int, double, float, boolean, etc.) or it can reference an object of the s

The newer versions of greenfoot have the 'setColor' and 'setFont' methods using parameters of type 'greenfoot.Color' and 'greenfoot.Font'. Remove the import lines 3 and 4 and replace 'Font.PLAIN' on line 14 with 'false, false' to conform to the 'greenfoot.Font' constructor.