Discussions

Thanks that worked!

Please show what you have tried. Cannot fix unseen code. Use the 'code' link below the reply box to insert code into your posts.

There are many scrolling engines available here. I have several up. My latest one, Easy Infinite Scrolling Support Class, is quite a simple one and easy to use. If you do not have a background image that needs to scroll, it would be perfect (the background scrolling engine of this particular support class 'wraps' the background image; however, the actors can scroll without the background. Another demonstration of its use is in my Wombat Racing scenario.

IT WORKS!! Yes! Thank you again for all your help!

Line 22: <Code Omitted> This creates a variable which can hold a reference to an array, but it doesn't create an array. Nowhere in your code is an array created, so there is no array; 'thisDeck' remains null. When you try to use it, you would get a NullPointerException. You need to initialise the variable with an array: <Code Omitted> (By the way, if you need help with an exception, please post the stack trace or at least say which line you get the exception on! This makes it much easier to diagnose.)

Should they stay private or change them to public? I posted the scenario as well on my profile.

Yeah put them in both, once in the world code, and once in the food code

Like I said, that code was not going to be exactly what you needed. You will have to determine which way to move the ball and move it in the proper direction. Unfortunately, I am short on time at the moment and will probably be out for several hours.

First issue: the 'adjustToGrid' method was created to accommodate square grid-cells. You will need two separate fields, 'gridCellX' and 'gridCellY', instead of the one field, 'gridCellSize' for the dimensions (width and height) of one grid-cell. Second issue (maybe): if the size of your Background world is not at least (1050, 600), then you will have an issue. After removing the declaration of the field 'gridCellSize' and adding in 'gridCellX' and 'gridCellY', you will need to set the value of those fields in your 'createVariable' method. Then change the 'adjustToGrid' method to this:

Okay so far i have <Code Omitted> which complies fine but doesn't actually delete the last minim created and I don't really know what i'm doing wrong

I do not understand what you mean. I do not see 'setDirection' nor 'atWorldEdge' in that list. Also, the 'move' method inherited has one int parameter and you are trying to call one without any parameters; so, the one you are calling is non-existent.

This should be categorized under 'Other', not 'Programming'. However, the answer is yes. My Clock/StockWatch/Timer scenario uses different worlds to run the different applications. This show the ability of both the choice making and of multiple projects in one. To show the versatility of greenfoot -- how about two games in one. Check out my PIP Actor Class scenario (not that you would want something like that).

First create a subclass of Actor to display the message; then give it the behavior (using the act method) to remove itself upon "whatever" key press.