Bomb Upgrade

// Import ArrayLists
import java.util.ArrayList;

/**
 * New methods for Subclass Bomb which inherits data and methods from Bullet
 * @author Sina, Christian and Elliott
 * @version June 16, 2014
 */
public class Bomb extends Bullet

{
	// Determines if the bomb exploded yet
	private boolean explode; 
	/**
	 * Constructs a Bomb object
	 * @param x the x coordinate of the Bomb
	 * @param y the y coordinate of the Bomb
	 * @param alien the alien the Bomb is aimed at
	 * @param tower the tower from which the bomb was shot
	 */
	public Bomb(double x, double y, Alien alien, Tower tower)
	{
		
		super (x,y,10,15,100,alien,tower);
	
	}
	/**
	 * Overrides the collisionCheck for the regular Bullet by having an extra step where the bullet explodes
	 */
	public void collisionCheck(ArrayList<Alien> aliens)
	{
		
		this.directionAdjust();
		// If the bullet has not exploded yet, we check every alien to see whether or not it has collided with an alien or not
		if (!explode)
		{
		for (Alien nextAlien : aliens)
		{
			if ((this.xPos - nextAlien.xPos()) * (this.xPos - nextAlien.xPos())
					+ (this.yPos - nextAlien.yPos())
					* (this.yPos - nextAlien.yPos()) <= (this.size/2.0+27/Math.sqrt(2)+this.speed/2)*(this.size/2.0+27/Math.sqrt(2)+this.speed/2)
					&& nextAlien.isAlive())
			{
				// Now the bullet explodes and the boolean for explode becomes true
				this.explode = true; 
				this.explode();
				
			
			
			}
		}
		// If the bullet is off the board then it is no longer intact

		if (this.xPos < 0 || this.yPos < 0||this.xPos>729||this.yPos>675)
		{
			this.intact = false;
		}
		}
		// If the bullet has already exploded, then do a collision check again but with its increased size
		else 
		
		{
			// Check each alien to see if it is close enough to the bullet
			for (Alien nextAlien : aliens)
			{
				if ((this.xPos - nextAlien.xPos()) * (this.xPos - nextAlien.xPos())
						+ (this.yPos - nextAlien.yPos())
						* (this.yPos - nextAlien.yPos()) <= (this.size/2.0+27/Math.sqrt(2)+this.speed/2)*(this.size/2.0+27/Math.sqrt(2)+this.speed/2)
						&& nextAlien.isAlive())
				{
					// If the alien is close enough then it takes damage and the tower gets an extra hit
					nextAlien.takeDamage(this.damage);
					tower.increaseNoOfHits();
				
				
				}
			}
			this.intact = false;
		}
			

	}


	
	/**
	 * Explode method stops the bullet and blows it up to a larger size so it damages more aliens
	 */
	public void explode()
	{
		this.size = 100*Math.sqrt(2);
		this.speed=0;
	}
	
}