We are trying to end our game of Breakout. Once we hit all the bricks we want to end the game or have something saying winner on the screen. Not sure where to even start. Once we have added the game over code, and play it, we hit one brick and an error occurs. We need help! Here is our ball code:
import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
/**
* The ball of the game. It moves and bounces off the walls and the paddle.
*
* @author mik
* @version 1.0
*/
public class Ball extends Actor
{
private int deltaX; // x movement speed
private int deltaY; // y movement speed
private int count = 2;
private boolean stuck = true; // stuck to paddle
private Counter counter;
private int blocksBroken = 0;
private Block block;
/**
* Act. Move if we're not stuck.
*/
public void act()
{
if (!stuck)
{
move();
makeSmoke();
checkOut();
checkBlock();
}
}
/**
* Move the ball. Then check what we've hit.
*/
public void move()
{
setLocation (getX() + deltaX, getY() + deltaY);
checkPaddle();
checkWalls();
}
/**
* Check whether we've hit one of the three walls. Reverse direction if necessary.
*/
private void checkWalls()
{
if (getX() == 0 || getX() == getWorld().getWidth()-1) {
deltaX = -deltaX;
}
if (getY() == 0) {
deltaY = -deltaY;
}
}
/**
* Check whether we're out (bottom of screen).
*/
private void checkOut()
{
if (getY() == getWorld().getHeight()-1) {
((Board) getWorld()).ballIsOut();
getWorld().removeObject(this);
}
}
private void checkBlock()
{
Actor block = getOneIntersectingObject(Block.class);
if (block != null)
{
getWorld().removeObject(block);
deltaY = -deltaY;
Board myBoard = (Board) getWorld();
myBoard.score();
if (counter.getValue() == 10) {
Greenfoot.stop();
}
}
}
private void checkPaddle()
{
Actor paddle = getOneIntersectingObject(Paddle.class);
if (paddle != null) {
deltaY = -deltaY;
int offset = getX() - paddle.getX();
deltaX = deltaX + (offset/10);
if (deltaX > 7) {
deltaX = 7;
}
if (deltaX < -7) {
deltaX = -7;
}
}
}
/**
* Move the ball a given distance sideways.
*/
public void move(int dist)
{
setLocation (getX() + dist, getY());
}
/**
* Put out a puff of smoke (only on every second call).
*/
private void makeSmoke()
{
count--;
if (count == 0) {
getWorld().addObject ( new Smoke(), getX(), getY());
count = 2;
}
}
/**
* Release the ball from the paddle.
*/
public void release()
{
deltaX = Greenfoot.getRandomNumber(11) - 5;
deltaY = -5;
stuck = false;
}
}
