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strange?

By programmer22, with 2 replies.
Last reply by programmer22, almost 13 years ago:

its ok i figured it out i just borrowed some pics

TheNightStrider

Sound Problem? Help!

By TheNightStrider, with 2 replies.
Last reply by TheNightStrider, almost 13 years ago:

It had no tags on anyway - i have converted them in wavs anyway now - this was really irritating me!

"Life is too short..." Using getObjectsInRange()

By Omniscience, with 7 replies.
Last reply by Omniscience, almost 13 years ago:

Thanks! Works great... plus I understood the logic behind it! I'm gonna try and create a Game Over dialogue Box, which will appear when the Car.class no longer exists in the world. Will post feedback! Thanks again danpost!

Random and not repeating

By Gazzzah, with 1 reply.
Replied to by Gazzzah, almost 13 years ago:

I could do this with 4 booleans I guess, but I figure there might be an easier way. It's kind of messy to have a massive "while" statement consisting of "(position == 1 && used1) || (position == 2 && used2) || etc...

Random # and chance problems

By Tomc84, with no replies.

I am suppose to pick a # between 1-4 for my vertical speed at random with a 50% chance to go up or down. Same with my left and right and I have no clue what I'm doing wrong... PLZ I need help :( import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo) /** * Write a description of class Ball here. * * @author (your name) * @version (a version number or a date) */ public class Ball extends Actor { private int ySpeed; private int xSpeed; private int wait; private int random; public Ball() { ySpeed = 3; //do not really need constructor call xSpeed = 3; wait = 80; random = Greenfoot.getRandomNumber(3)+1; } /** * Act - do whatever the Ball wants to do. This method is called whenever * the 'Act' or 'Run' button gets pressed in the environment. */ public void act() { //ballMove(); //bounceOffPaddle(); bouncOffWalls(); if (wait == 0) { ballMove(); } else { wait --; } } // public void ballMove() // { // setLocation(getX() +xSpeed, getY() +ySpeed); // } /** * Move the ball */ public void ballMove() // NEW MOVE METHOD { if (getY() == 0 || getY() == 500-1) { ((PongWorld)getWorld()).updateScore(this); setLocation( 350, 250 ); } else { //setLocation (getX(Greenfoot.getRandomNumber(3)+1), getY(Greenfoot.getRandomNumber(3)+1)); //Greenfoot.getRandomNumber(random)<2); RandomMove(); setLocation(getX()+xSpeed,getY()+ySpeed); //movement bounceOffPaddle(); // new call for bounceOffPaddle } } public void RandomMove() { if (Greenfoot.getRandomNumber(random)<2); { setRotation(Greenfoot.getRandomNumber(360)); } } public void bounceOffPaddle() { Paddle paddle = (Paddle) (getOneObjectAtOffset(0, 0, Paddle.class)); // tells ball paddle is here if (paddle != null) { ySpeed = ySpeed * (-1); } } public void bouncOffWalls() { if(getX() == 0 || getX() == 700-1) // use of logic or to condense two if statements { xSpeed = xSpeed * (-1); } // else ...........WHY NOT USE AN ELSE???? // { // xSpeed = xSpeed * (-1); // } } // public void bouncOffWalls() CAN BE CONDENSED A SINGLE IF STATEMENT...... HOW THOUGH?????? // { // if(getX() == 0) // { // xSpeed = xSpeed +1; // } // if (getX() == 700-1) // { // xSpeed = xSpeed * (-1); // } // } }

I am having trouble

By Clueless, with 10 replies.
Last reply by darkmist255, almost 13 years ago:

@clueless If you're still unsure I would say download the jdk-7u3-windows-i586.exe, since even if you have 64-bit system it will still run. @Builderboy2005 I'm same as Duta, I definitely think that if he's interested he should take a shot at coding! I wish him the best of luck with it, I'm just skeptical :D. Once again, if he is able to get started, I hope that he will make really good progress and will learn to be a great coder! PS: My motivational skills suck, so anything I say will probably be demotivating in some way :D.

HTML (not to do with Greenfoot)

By Duta, with 2 replies.
Last reply by Duta, almost 13 years ago:

Incase anyone's interested, I got it working with the following code: <html> <title>HTML Page 1</title> <script type = "text/javascript"> <!-- function popup() { newwindow2=window.open('','name','height=200,width=150'); var title = document.forms.value; var text = document.forms.value; var tmp = newwindow2.document; tmp.write('<html><head><title>' + title + '</title>'); tmp.write('<link rel="stylesheet" href="js.css">'); tmp.write('</head><body><p>' + text + '</p>'); tmp.write('<p><a href="javascript:self.close()">Close</a> this popup.</p>'); tm

Sequence of Button Inputs

By programmar, with 12 replies.
Last reply by programmar, almost 13 years ago:

It works now :) thanks again. By changing the firing method to if ("space".equals(key)) it fired multiple projectiles with one key press. I changed it to the code from http://www.greenfoot.org/topics/802.

How I could do that?

By TopInPut, with 1 reply.
Replied to by danpost, almost 13 years ago:

I am assuming that 'eatLeaf()' does nothing more that returns a boolean value depending on whether a leaf is intersecting the Actor or not. You code says to take the current (intersecting) leaf and move it one grid to the right. Now, assuming you want to add the new leaf at the same location (though you may want to place it randomly on your grid) 'getWorld().addObject(new Leaf(), x, y);' would do the trick (just set up x and y to appropriate random values for anywhere).

Can you help me plz about F10-button

By terapaht, with 1 reply.
Replied to by davmac, almost 13 years ago:

This happens only on Windows, but there's not much you can do about it. Use a different key.

TheNightStrider

Help!!!!!! I don't understand at all?

By TheNightStrider, with 13 replies.
Last reply by danpost, almost 13 years ago:

Check out the section on 'Class methods' and the following sections in the Classvars tutorial page

Discussions suggestion

By Duta, with 5 replies.
Last reply by darkmist255, almost 13 years ago:

@davmac I agree completely, the search bar can do everything we've suggested and more. My only reason for agreeing with the suggestion is that people just don't seem to be capable of using a search bar, so a category style thing might help. Speaking of categories, if we do want to change up the discussion forum, maybe add another category called "Error" to distinguish what is referred to by "Programming". I find that programming is a bit of a broad term on a programming forum :D.

support class - counter

By craigv, with 1 reply.
Replied to by davmac, almost 13 years ago:

First have a look at the methods available in the Counter class. It should be fairly obvious which methods you need to call to change the score. Then, when your program detects an event which should cause an increase in the score, call the appropriate Counter method. Have a look at this tutorial for general help with calling the counter methods from some other class. The tutorial doesn't use the Counter support class, but the principles are the same.

Cutting Images

By kiarocks, with 16 replies.
Last reply by kiarocks, almost 13 years ago:

Ok, that will be useful

Drop ball then turn at edge of world randomly

By Tomc84, with 1 reply.
Replied to by Morran, almost 13 years ago:

You want the ball to turn, and not rotate? You are using the "setLocation(int newX, int newY)" method to move your ball. setLocation() moves your ball in an absolute way. It doesn't care which direction your ball is facing in, it will still move it in the same way. I think that what you want is the "move()" method, which is in the "Animal" class I think. Just make Ball extend Animal instead of Actor, and use "move()" instead of "setLocation()". I hope this helps!

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