Discussions

It does not matter what your World subclass name is. All instances of subclasses of World are still World objects. So, the code need not be changed if you change the name of the World subclass. Now, although not necessary, you could be more specific as to what type world it actually is by changing line 2 to the following: <Code Omitted>This de

Hmmm I can't see a way that setLocation can remove the actor from the world, though. Sorry for all the hassle, but would you be willing to send us the scenario for us to try it out? This looks like a bug in Greenfoot as that exception shouldn't be thrown, but I'm struggling to see exactly how it happens at the moment. If you are happy to email the zipped scenario to support@greenfoot.org then we will take a look, fix anything on our end, and also advise you on a work-around.

It works now! All I had to do was change it to equal 4 instead of 5. Thank you all!

You will need to provide more code. The full class of the actor and possibly your World subclass as well.

This may be an issue with Java version. If you are double-clicking the JAR in Windows, it will use whatever version of Java happens to be the primary version on your machine. If this is not Java 8 (especially if it's Java 9 or later), that won't currently work well with Greenfoot's exported JARs, which currently only work with Java 8 (until we update to Java 9+ in future). Best work-around is to use a batch file as you describe -- you can try changing which Java is associated with .jar files but it's probably more trouble than it's worth, especially if other applications on your system need

This is a hack that we don't officially support... but having said that, the code looks like it should work. Technically you should add the focus listener on the JavaFX thread but I doubt that is the issue. If you run the exported program from the command line, do you see any exceptions in the console? Maybe add some System.out.println lines to check which parts of the code are reached.

My QActor class, which provides smooth moving by allowing fractional moving has fractional rotation as well. See my Smooth Mover Demo scenario.

Thank you very much!

Now I just need to get a life counter and make the leaves give the wombat health back.... lol

You want to show a value that goes from 0 to 100 (a percent value) to indicate how recharged the proton wave firing state is. You probably would want to use a loading bar type object which will show the progress visually instead of using text. Please refer to my Value Display Tutorial scenario.

Thank you so much that helped a lot i modified it a little bit and make it into 2 if statements and added some code and it works perfectly now! Thanks a lot for the help!

thx :D

you are AWESOME

My point is the there is a one-to-one correlation between the value of the initialOffset field and what would be returned by using the getRotation method. Because this is the case here, you really do not need that field. You can just use the returned value from the method, either directly or in some simple expression, to get the value of what the field would contain.