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Posted on 1998-07-18
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Last Modified: 2010-03-30
I want to randomly generate and move image of ball  from down to up .
i also want to store every x and y co ordinates of each ball untill it is vanished from top.
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Question by:yeda
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4 Comments
 

Accepted Solution

by:
tomd012698 earned 100 total points
ID: 1226994
This is the basic plan.  You'll need to fill in some of the gaps, but I think this will help.

1) Create a class that represents the location, and and motion of the ball.
2) Create a Vector within your Applet class to store the balls.
3) Create an animator thread to periodically update the location.

class Ball
{
  public Image _image = null;
  public int _x;
  public int _y;
  public int _xDelta;
  public int _yDelta;
}

class BallApplet extends Applet
  implements Runnable
{
  private Vector _vector = new Vector();
  private Thread _thread = new Thread( this );
  private Image _ballImage = null;

  public void start()
  {
    // Download your image.      
    // Create some balls, and fill in the data members.
    // Start the animation thread.
    // Force a repaint.
  }

  public void run()
  {
    while ( true )
    {
      // Update the positions of all of the balls.
      // When ball leaves the screen, replace with a new one.
      // Force a repaint.
      // Sleep this thread for a while.
    }
  }

  public void paint( Graphics g )
  {
    // Paint all of the balls.
  }
}

0
 

Expert Comment

by:hateli
ID: 1226995
I will try and be in touch with you .

Thanks a lot.
0
 

Author Comment

by:yeda
ID: 1226996
i AM HAVING PROBLEM IN REGENERATING THE BALLS ! PLEASE HELP ME WITH FULL CODE !

0
 

Expert Comment

by:usk
ID: 1226997
I just created the same applet for "hateli".

The applet and source code is located at :

www.cybersite.dk/examples/dropball.htm

(I would like some points for it, if you can use it)


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