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Sound Error Whenever Greenfoot.ask() is Answered

By preheatto360, with no replies.

In my scenario, there is a title screen world that plays sound when it is initialized, and has a button to go to a cutscene world. Both are subclasses of the foodtruck class. The cutscene world stops the sound then runs an ask prompt for the player's username. Whenever I run the scenario, input something in the prompt, and reset to enter the title world again, the sound there becomes really glitchy and gives me a weird error: <Code Omitted> Foodtruck class: <Code Omitted> Title class: <Code Omitted> cutscene class: <Code Omitted> The error doesn't happen if I don't input something in the prompt beforehand, so I think it has something to do with that. Any help would be really appreciated!!

Checking the Solution for a Picross Game

By magentaink, with 7 replies.
Last reply by danpost, about 10 hours ago:

magentaink wrote...

The clues are just images on the side of the grid. At the moment I have the solution in the square class like this: << Code Omitted >>

A better way to assign the entries is like this: <Code Omitted>Furthermore, it should not be in your square class -- it should be in your game world class. Also, as above, you should be able to visually see the solution within the entries. If the rows and columns are mixed up and the v

Need showText to go away after a couple seconds

By enw, with 1 reply.
Replied to by danpost, 8 days ago:

I made an if statement that activates showText, among other things, and I want to get rid of the text after a couple of seconds. I know how to get rid of the text itself, I just don't know how to do that after a certain period of time. How would I?

Simply add an int showTextTimer to the class. You want that as long as it has a value of zero, no text will be showing: <Code Omitted>Just set a positive value (maybe 180) to the field when the text is displayed.

moving entities spinning and getting stuck at world edge or obstacles

By soap, with 1 reply.
Replied to by danpost, 10 days ago:

in my game i have some randomly moving entities, where they bounce off the world edge and obstacles. but sometimes, not all the time, they get stuck inside the obstacles or at the edge and spin in place before getting unstuck and moving normally again. sometimes they dont get unstuck and just spin there. how do i stop this? << Code Omitted >>

The movement code is not in this class. Need to see BaseClass codes.

Check all aliens are dead with getObject?

By BBB, with 1 reply.
Replied to by danpost, 10 days ago:

I have an alien actor type and would like to use get object to see if all the aliens have been removed so I can switch to the win screen of my game. for some reason this code: << Code Omitted >> isn't working. what am I doing wrong?

You are using the wrong condition on line 1. The returned value using getObjects is NEVER null. It might be empty, however. I would put this code in your world class, myself. Checking for game over seems like an action that is the responsibility of the world, In world class:

Static variables are not resetting?

By Richter, with 1 reply.
Replied to by danpost, 10 days ago:

Richter wrote...

I programmed a game in Greenfoot and used static variables. When I press on reset to reset the game, the static variables are not resetting to their “default” value (here boolean). Further in the code I made that when clicked on this object (here start button) to set the value of the static variable (here called startgame) to true but this doesn’t happen. Does someone know why this is not working or have a link where I can read about this?

Static variables are initialized during compilation. Resetting the scenario does not re-compile the program. Set the initial value

snake-alike game

By soap, with 1 reply.
Replied to by danpost, 12 days ago:

im trying to make a code where the player can eat humans, and once it does, it gets a tail of those humans (just like in snake where if the player eats an apple, the snake gets a longer tail). i dont know how to determine the position of the tail so that it follows the player. << Code Omitted >>

This is what is usually done in snake-like games: If moving and NOT eating: the current "tail" is moved to where the head is, then the head is moved. If moving AND easting: a new "tail" is placed where the head is, then the head is moved. In neithe

isKeyDown

By BYY, with 1 reply.
Replied to by danpost, 12 days ago:

I am trying to make a code that add one to a variable if you click the space bar. The code I wrote made the variable keep increasing if i hold the space bar but I don't want it to do that

You could use the getKey method instead of isKeyDown. However, there are limitations on applying getKey for this use. Best is to add a boolean field to track the state of the "space" key:

Restaurant Game

By BYY, with 1 reply.
Replied to by danpost, 15 days ago:

i<< Code Omitted >>This code keeps subtracting from the points, even if you click on the right food. The variables were created in another class.

What do you mean by "variables were created in another class"? You cannot refer to a variable from one class in a different class just by using its declared name. You either need to prefix the variable name with a reference to an object of that class it is declared in or the class name itself (depending on the properties of the variable). There may be another issue, in that you do not seem to be removing any objects touched -

why is the mouse api so bad

By nubnt_, with 1 reply.
Replied to by danpost, 17 days ago:

nubnt_ wrote...

"if the mouse didn't update last frame, well obviously it stopped existing!1!!" why is it like this please tell me i'm not the only one with this problem

Instead of a general complaint, how about giving what you tried to do with what code and how it acts. Maybe there is a way to do that which you want anyway. In general, however, the API is a bit awkward to work with when it comes to getting more complicated actions from the mouse. For basic point, click and drag operations, it is sufficient. Still, I suggest you provide code with a detailed explanation of the i

How to call this method in a class from another class.

By Shadowolf, with 2 replies.
Last reply by danpost, 18 days ago:

Your TriangleAnswer class can be much more simply written as follows: <Code Omitted>

trying to get an int from an actor in a different world to show it in the end

By Alizee, with 2 replies.
Last reply by Alizee, 19 days ago:

boolean in method

By MarkusB, with 1 reply.
Replied to by danpost, 25 days ago:

MarkusB wrote...

<< Code Omitted >> I cannot get this section to work. It says that variable "annahme" is not initialised and that is because it is not. It is supposed to be specified by the player once the previous check "if(gesteinVorhanden())" has been finished. Only then should "public void sammeln(boolean annahme)" be executed and a true or false should be given. : ( And "boolean annahme; sammeln(annahme); are correctly preparing that part, no? : (

As a primitive variable type -- boolean, it requires initialization within a method or constructor. As an instance field, it w

object/entity passes through barrier

By soap, with 1 reply.
Replied to by danpost, 28 days ago:

You are probably letting the entity pass the barrier to begin with -- which should not be allowed to happen. When a collision is encountered, move the actor back to the original (x, y), which should be inside the barriers.

something not working

By Alizee, with 6 replies.
Last reply by danpost, 28 days ago:

Alizee wrote...

characters. << Code Omitted >>

Change from this: <Code Omitted>to this: <Code Omitted>The for loop works pretty much like the while loop -- in that it also must complete its execution (complete looping) in one act step. Removing the loop (without removing what is inside it) will have only one P

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