Discussions

Hey USBest! If you still want to let your crocodile move in a perfect circle, check out this scenario from SPower: http://www.greenfoot.org/scenarios/4873

yess thankss now it works perfect :D

In your act() method for the Ball, you have a section that already starts like the following, but this is what I believe you need after you add 'brickColor' to the Brick class.. <Code Omitted>

Arrays are simple collection of objects of the same type (where all decendents of an object can be considered the same type .. like all subclasses of Actor). Typically, you declare an array like so: Base_Type Array_Name = new Base_Type; where Base_Type is the class name like Actor, String,etc Array_name is any legal java name length is the size of the array you what to create eg. String names =new String; // creates an empty array with 10 slots starting at 0 and going to 9 Or you can initialize the values at the time of de

What your teacher is suggesting sounds a bit like a bubble sort - if that is what he's getting at, I can provide code. It is, however, a very inefficient sorting method

for vertical scrolling, would you replace all X's with Y's and all Width's with Height's?

Oh fair point, I hadn't thought about the possible recursiveness of it. I suppose you could have a List of ac

thx, lol

Just create a world constructor to recieve the actor. Example (still using 'Arena', and adding actor Player class 'player'): 'Greenfoot.setWorld(new Arena(player));'.

Thanks for the help :) yep it was to do with file access xD it hated getting images from another folder such as /smurf/smurf1.png once I had exported it xD so stuck images back in /images/ instead of /images/smurf/ and it worked perfect ^^

That's it! Thank you for explaining that. It seems so obvious now haha. Thanks again. It is much appreciated!

ok thanks thats a much easier fix and ill make all nessciary corrections later when we combine our pieces.

One thing is: you are storing the possible submitted responses in String variables, and then trying to ask if they hold a value of 'true'. Another thing: you are using 'Greenfoot.isKeyDown(String key)' to catch the response; using 'Greenfoot.getKey()' would be more appropriate in this case. One other thing (and I hope and pray that this is not what it looks like): the first line is not in a method, is it? (it should be a world variable -- and possibly static). Anyways, for getting the keystrokes:

Alternatively, it might be easier to create an entirely different world that you can switch into. This can make pausing a bit easier, since if you stayed in the same world, you would need methods in all the objects to support pausing.

You will need to track two things within the for loop, that need to be initialized before the for loop. One to hold to closest gun object found, so far ('closestGun'), and one to hold the closest distance of that gun object ('closeness'). As you go through the for loop, compare the distance of the current gun class object with 'closeness' and if it is closer than replace the values of both variables. When the for loop is done, 'closestGun' will contain the correct gun class object. Calculate the angle between 'this' and the 'closestGun' and pass that to the projectile object class c