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inside custom component

Java Development

Trusted Contributor
Posts: 177
Registered: ‎03-02-2010
My Device: Not Specified

Brick breaker game help how redirect ball when hit o brick.............?



how i redirect a ball when it hit on bricks on brick?.


please refer some code if possible. i draw bricks and ball using XYrect and continue calling paint method.


i am used following code but some time it not work and ball does not redirect on right way.

            boolean movelt = brickrect.contains(ballRect.x, ballRect.y);
            boolean movert = brickrect.contains(ballRect.X2(),ballRect.y);
            boolean rightln = brickrect.contains(ballRect.x, ballRect.Y2());
            boolean leftln = brickrect.contains(ballRect.X2(), ballRect.Y2());

             if (rightln && leftln) {
                goingDown = false;
             else if (!rightln && !leftln) {
                goingDown = true;
             else if (movelt || rightln) {
                goingRight = true;
             else if(movert || leftln){
                goingRight = false;



please give me some code for this and please let me know  if i am doing wrong

Posts: 562
Registered: ‎09-30-2009
My Device: Not Specified

Re: Brick breaker game help how redirect ball when hit o brick.............?

Do you know what the physical relationship is between a flat mirror and a beam of light pointed at it is? It is the same as a particle hitting a flat surface. Model this in your code and it should behave correctly.


This is not a Blackberry specific issue. This is a general instance of collision detection in computer graphics and how to handle it appropriately.