Discussions

You cannot use collision checking methods in the constructor of an Actor subclass. The constructor is what creates the object -- it must be created before being added into any world. Usually, the act method is where collision checking should be done.

Internal or external counter (value shown on screen or hidden)? What have you tried? Show some attempted code. The "end game screen" can be either an actor object that is added at the end or a separate world. Which do you prefer and what have you tried?

You can do: <Code Omitted> Alternatively: <Code Omitted> However, from a design perspective it is better to use polymorphism (as danpost suggests). You don't need to check for "a" and "A"; they would be the same key.

There are multiple collision checking methods provided in the Actor class. I would start by using one of them. Check the greenfoot.Actor class API documentation to see what methods are available.

Alright gonna try it right away :) thx a lot :D

Great, thanks both of you!

WoW thank you very much

There are two places where you will need to check for touching a platform. After line 14. where you move vertically and after line 29, immediately after possibly moving horizontally left or right. You will need to use the value of 'gravity' to determine whether touching from above (when 'gravity' is less than zero) or from below (when 'gravity' is greater than zero).

When I change the name I get a lot of errors in the other classes.

You would need to enter something like <Code Omitted> as line 5 and you need to make sure that the method name on line 3 matches the class name. +

Ok i got it now thx!

Thank you VERY much!!!

Use a combination 'if' statement; use both the direction and position in determining whether to change directions or not (for both sides). Something like this: <Code Omitted>

Could be. I will have a look. Thanks a lot.

If you write that code in the act method then the lives will be decreased once every act cycle which means that after a few seconds the lives will be -500. That code you put in the place that you want the lives to be decreased (same as where you put the code for re-setLocation of the fly).