Greenfoot

Problem with setImage text style

By Roshan123, with 5 replies.
Last reply by Roshan123, over 4 years ago:

Got it! Thanks

How to use an actor dependency only when the needed actor is there

By Courier_, with 3 replies.
Last reply by danpost, over 4 years ago:

Courier_ wrote...

Thanks! that worked how I needed it to

That is because an element is not trying to be extracted from a list without any elements. A test is done to the list to ensure an element exists in the list before extracting the element.

I need help with my game. It doesn't set the current state to the new state. It allows the user to keep pressing "y"

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

The use of "this." seems a bit ... off. Each usage is on a method that is located in the World class, which is the "super" of this class. More appropriate would be to use "super." instead. However. the methods are not over-shadowed by methods with the same names in the MyWorld class, so ... that is why it still works. Greenfoot does not force the use of a subject for method calls. As such, I suggest just dropping all the "this."s from the class. Next, you can remove all objects from the world in one simple call by using "Actor..class" instead of calling out all the different typ

I have been trying to figure out how to do something like ray casting but I ran into a problem

By Triangluminati, with no replies.

For starters I just started learning to code about 4 or 5 months ago for my school so I'm sorry if I get terminology or something wrong. I have been trying to learn how to code ray casting in Greenfoot so I can apply it to the project I have been working on. I have been following a tutorial somewhat (https://sinepost.wordpress.com/2012/06/16/raycasting/) but I have been trying to come up with my own solutions in areas. I have gotten a useable, but not very playable, version of ray casting to work but the rays have to travel far enough that once they reach an object, the distance between them is so large and the result comes out very blocky/chunky. My main question is if there is a way to shoot out more rays to make the objects appear more smooth or if there is a different approach to reach the same effect. I will add my code here for my player:<Code Omitted>and I will add my world code <Code Omitted>

how do I set an actors rotation to another actors rotation?

By ThatsCrispy, with 2 replies.
Last reply by danpost, over 4 years ago:

Where is the method drawMaze (in the Corridor class) called from? Show code block.

how do I make it so I only shoot 1 bullet when space is pressed?

By NUKES, with 2 replies.
Last reply by NUKES, over 4 years ago:

works perfectly, thank you very much!

Object does not get removed when at Edge.

By NUKES, with 2 replies.
Last reply by NUKES, over 4 years ago:

danpost wrote...

NUKES wrote...

This might just be a stupid mistake by me, but I cant for the love of god figure out why it does not work. In the following code, I made it so, if my "Bullet" object, touches either the Edge or the "Ball" class, it should get removed, but for some reason it just stays?

Is the remove method being called from anywhere? If so, from where? If not, then why not?

As I thought im just Stupid lol. I had to call the remove method. works now, thanks.

Lamda expression and double colon operator

By Roshan123, with 5 replies.
Last reply by RcCookie, over 4 years ago:

Roshan123 wrote...

Thanks a lot to both of you @RcCookie can it be also written as <Code Omitted> ?

No, because Button is not the interface with one method. But you could write <Code Omitted>

laser collision detection not removing the laser when a hit is detected

By roonie01, with 1 reply.
Replied to by Spock47, over 4 years ago:

Can some one plz give me code to make a score counter according to how much seconds the actor is alive

By apcode, with 1 reply.
Replied to by danpost, over 4 years ago:

apcode wrote...

make a score counter according to how much seconds the actor is alive

In class of actor: <Code Omitted>

WHY WONT BY WORLD BUILD

By Damste22, with 1 reply.
Replied to by danpost, over 4 years ago:

Damste22 wrote...

the program's not creating my world

<Code Omitted>and <Code Omitted>The iterators, i, remain at zero (no increments given). So, it is stuck in a loop. World object never completes initializing. In fact, Key objects are created for the first white key multiple times, repeatedly, until memory runs out, whereby you will get a OutOfMemoryException.

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Problem with setImage text style

How to use an actor dependency only when the needed actor is there

I need help with my game. It doesn't set the current state to the new state. It allows the user to keep pressing "y"

DON'T do method if actor does not exist

Add Actors through actor.

Moving World

Act() cycles per minute

I have been trying to figure out how to do something like ray casting but I ran into a problem

how do I set an actors rotation to another actors rotation?

how do I make it so I only shoot 1 bullet when space is pressed?

Object does not get removed when at Edge.

Lamda expression and double colon operator

laser collision detection not removing the laser when a hit is detected

Can some one plz give me code to make a score counter according to how much seconds the actor is alive

WHY WONT BY WORLD BUILD