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Is the Greenfoot project alive?

By Rabestro, with 3 replies.
Last reply by Roshan123, over 5 years ago:

And sorry becaz the reply has no relation to the topic

Complex numbers problem

By rhys, with 7 replies.
Last reply by danpost, over 5 years ago:

Use class name (ComplexNumber) for static method calls. Use instance variable name for non-static method calls. The mod method is not static, therefore: <Code Omitted>If you had a static mod method (which you do not -- at least, I did not find one in the class), then you might have something like this: <Code Omitted>

Lag

By Roshan123, with 10 replies.
Last reply by Roshan123, over 5 years ago:

Thank u!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! U wasted a lot of ur time i teaching a newbie After looking at the code i knew that my basic is not strong and i have to strive more(actually i knew it already) I have not been taught java. I m learning on my own and my basic is not so strong to understand ur code. Lastly i would like to say u that; when i will be a genius like u then i shall look that how u made fps Initially i thought that fps would be easy and easy to learn but now its not easy for me or a beginner

Curly bracket issue

By h-t-hi, with no replies.

I’m using Greenfoot on a Mac and every time I add a bracket in the grey section (i.e. if (getY() <=0 { ), the closing bracket at the bottom of the green section disappears, which won’t let the code work properly. Afterwards, Greenfoot crashed. Also, I have a second issue, there’s a white space that I cannot get to go away (the white block of space above the yellow section). Is this a Mac-related issue with Greenfoot, or am I doing something wrong? If so can someone help me fix this problem?? My work here: https://i.imgur.com/Y0uOnXi.png

Reading the value of the speed slider

By RcCookie, with 4 replies.
Last reply by danpost, over 5 years ago:

RcCookie wrote...

The other way does not work if you change the setting on the slider manually, it only works when setting it using code.

Gravity in FlappyBird

By catbear, with 1 reply.
Replied to by danpost, over 5 years ago:

The statements in your act methods are not actions (not anything that would be done repeatedly). The first line in both act methods need to be removed, first and foremost. It is almost never wise to create an object in a class that describes (or defines) that type. The second lines only need to be done once, during the creation of said object. That means you can move both those lines to their respective class constructors. As far as the "gravity" issue, you will need to post the SharedResources class codes (so we know what you are working with).

Setting background

By yourboiRISHI, with 2 replies.
Last reply by RcCookie, over 5 years ago:

Based on your comment‘s title I guess you want to set the background image to a given one. By saying „new Beach()“ with whatever argument in it you are actually trying to create a new instance of „Beach“. However, you only want to set the background image. So, what you actually want to do is create a new instance of GreenfootImage with the path of the image as parameter. That is also the type of parameter that „setBackground()“ expects. So, the closest to your Version would be:

NullPointerException

By abcd321, with 3 replies.
Last reply by Super_Hippo, over 5 years ago:

I never used the Timer and TimerTask classes (and I don’t see a reason why you do) but the problem might be happening because each act cycle, you create new Timer and TimerTask objects with every Body object which are executing code including the intersection check 1000 times a second.

Sauravbasyalking12

Nested loops

By Sauravbasyalking12, with 3 replies.
Last reply by Sauravbasyalking12, over 5 years ago:

thank you so much both of you

Are you allowed to make a Greenfoot app for commercial use

By GrowDot, with 3 replies.
Last reply by nccb, over 5 years ago:

I think that tutorial is back from a time before Greenfoot was open source. Greenfoot is released under GPLv2 with classpath exception. What this means is you must either publish your app GPLv2 (which practically speaking means you would struggle to sell it) or you must package it in such a way that the Greenfoot JAR could be swapped out for a different version (this is a simple litmus test of what the GPLv2 requires of you). The latter isn't too hard, you'd just ship your JAR alongside the Greenfoot JAR, and you wouldn't then be required to release the source for your scenario.

How to make greenfootimages

By wisetrap11, with 1 reply.
Replied to by Nosson1459, over 5 years ago:

you have to put the picture in the scenarios images folder and then create an instance of class greenfootImage using the exact file name of the picture you put in (capital sensitive).

Sharing a variable across actors

By Randomgreenguy, with 13 replies.
Last reply by Randomgreenguy, over 5 years ago:

ok thank you for all the help, means a lot.

setLocation for other classes

By Quabey, with 1 reply.
Replied to by danpost, over 5 years ago:

Quabey wrote...

Hey, Im currently working on a small game and Im trying to reset the player after every round to his starting point. This code is in my commands class snake and turtle are both subclasses of commands << Code Omitted >> But it just doesn't work. Anyone here know how I can fix it.

Looks to me like lines 8 thru 11 (presuming "actor1", which looks undefined, should be "snake") are specific to the turtle and lines 4 thru 7 are specific to the snake and, therefore should be done in their specific classes (however, cross-collision checking should be avoided).

Illegal scenario

By Roshan123, with 2 replies.
Last reply by danpost, over 5 years ago:

Roshan123 wrote...

Danpost plz tell me that is he a hacker or its a problem with the website It shows that 6 users voted his scenario, but below the like button there is no user who voted his scenario Its the same guy whose account is disabled by greenfoot.org

Maybe more of a spammer than a hacker. Possibly all 6 users who voted were disabled. ?? (just a guess)

Can i do something like him or its illegal

Not something I would suggest doing, even if possible.

Is there an alternative to setLocation that uses the type double?

By byNici, with 1 reply.
Replied to by danpost, over 5 years ago:

byNici wrote...

Is there an alternative to setLocation that uses the type double?

There is not -- at least, not among the methods given in the greenfoot package. However, that does not preclude you from making one yourself; or from importing a class that does have one. The SmoothMover class has a setLocation(double, double) method. Use the menu bar commands "Edit >> Import class ..." and select it. Then have your Actor subclass extend it. You will then have to modify your code to make use of it.

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