I'm making a breakout game and trying to get it to where when the Ball hits a Brick, it changes to the color of the Brick it just hit. I need some help...
Here's my Ball code:
import greenfoot.*; // (World, Actor, GreenfootImage, and Greenfoot)
import java.awt.Color;
import java.util.List;
/**
* A ball is an object that can hit other objects and bounce off the
* edges of the world (except the bottom edge). It will bounce off of
* a paddle as well.
*
* @author Barbara Ericson Georgia Tech
* @version 1.0 April 6, 2007
*/
public class Ball extends Actor
{
/** the radius of this ball */
private int radius = 10;
/** the width of this ball (diameter) */
private int width = radius * 2;
/** the color of the ball */
private Color color = Color.BLACK;
/** the amount of change in x during each act */
private int velX;
/** the amount of change in y during each act */
private int velY = 3;
/**
* Constructor that takes no arguments
*/
public Ball()
{
velX = Greenfoot.getRandomNumber(3) + 1;
if (Greenfoot.getRandomNumber(2) == 0)
velX = -1 * velX;
updateImage();
}
/**
* Constructor that takes initial values for all fields
* @param theRadius the radius to use
* @param theColor the color to use
* @param theVelX the amount to change in X per act
* @param theVelY the amount to change in Y per act
*/
public Ball(int theRadius, Color theColor,
int theVelX, int theVelY)
{
radius = theRadius;
color = theColor;
velX = theVelX;
velY = theVelY;
updateImage();
}
/**
* Balls will move and check if they have hit a brick or paddle or
* one of the edges of the world
*/
public void act()
{
BreakoutWorld world = (BreakoutWorld) getWorld();
setLocation(getX() + velX,
getY() + velY);
Actor actor =
this.getOneIntersectingObject(Actor.class);
if (actor != null && !(actor instanceof Message)&& !(actor instanceof GreenPowerUp)&& !(actor instanceof BallX))
{
velY = -velY;
}
if (actor instanceof Brick)
{
world.removeObject(actor);
if(Greenfoot.getRandomNumber(5) == 1)
{
world.addObject(new GreenPowerUp(), this.getX(), this.getY());
}
world.checkIfWon();
}
if (getX() - radius <= 0)
velX = -velX;
if (getX() + radius >=
BreakoutWorld.WIDTH)
velX = -velX;
else if (getY() - radius <= 0)
velY = -velY;
if (getY() + radius >= BreakoutWorld.HEIGHT)
{
world.removeObject(this);
world.newBall();
}
//checkHit()
}
/**
* Method to set the ball color
*/
public void setColor(Color theColor)
{
this.color = theColor;
updateImage();
}
/**
* Method to create the image and set it for the ball
* If you change the ball width or color you should
* invoke this again
*/
public void updateImage()
{
GreenfootImage image = new GreenfootImage(width,width);
image.setColor(Color.BLACK);
image.fillOval(0,0,width,width);
setImage(image);
}
}
