Discussions

Thanks for all the help, this is my first time using Greenfoot and i am learning as I go. I will try to use your suggestion to simplify the code

You will need to zero the alpha of each pixel individually. This can be done by using the 'setColorAt' method within for loops.

wow

Thanks, that worked perfectly!

This speed of execution is controlled by the speed slider for the specific scenario. At the normal speed of 50, one time step is somewhere around 1/60th of a second. That is, something between 55 and 60 act steps are executed each second. Please note that using Greenfoot.delay(int) will suspend the entire execution for the given time -- no actors will move; no code will be executed except for an empty loop that repeats itself until the given time has expired.

Well, there are advantages and drawbacks either way. If all at one, you save time; but, allow pattern recognition to aid the user in clicking the appropriate squares. If seperately, it would be time consuming to flash the squares (especially when flashing each for 5 seconds, which seems like an exagerated amount of time to begin with); but, hides the pattern, making it more difficult to solve (however, limiting to 5 squares favors the user as well). With Simon Sez, each g

I will try to explain a little more clearly. Suppose you have an abstract class, AbstractClass. You cannot do this: <Code Omitted>This is what Hippo was trying to say. However, if you have a subclass of that class: <Code Omitted>then, you can create an object of type AbstractClass by instantiating the NonAbstractClass class: <Code Omitted>In fact, the World and Actor classes of greenfoot are abstract classes; yet, you can create worlds and actors no

oh.. obviously... thanks!

You may want to check out my scrolling tutorial to see how it all is accomplished.

Even I will try it.

Much thanks! :)

I think the easiest way would be to add the image when creating the world (so it is there before the run key is pressed). It starts with an invisible image, so you can't see it. Then it will itself give an image when it is running and will remove itself after 30 seconds: <Code Omitted>

It works!! see link of it... ---> FIRE AND ICE <----