bullet.java.bak

一个用Java开发的射击类游戏

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;

public class Bullet extends Sprite
{
	private int	directStatus = 0;
	private WallManager	wallManager = null;
	private EnemyManager	enemyManager = null;
	private int	liveTime = 0;
	
	public Bullet(Image tempBulletImage, WallManager tempWallManager, EnemyManager tempEnemyManager)
	{
		super(tempBulletImage, War.BULLET_WIDTH, War.BULLET_HEIGHT);
		wallManager = tempWallManager;
		enemyManager = tempEnemyManager;
	}
	public void isOverTime()
	{
		liveTime++;
		if (liveTime == War.BULLET_LIVE_TIME)
		{
			return true;
		}
		else
		{
			return false;
		}
	}
	public void setDirectStatus(int tempDirectStatus)
	{
		directStatus = tempDirectStatus;
	}
	public int	getDirectStatus()
	{
		return directStatus;
	}
	public void move()
	{
		if (directStatus == 0)
		{//上
			move(0, -War.BULLET_RATE);
			if (isLimited())
			{
				move(0, War.BULLET_RATE);
				setDirectStatus(3);
			}
		}
		else if (directStatus == 1)
		{
			move(0, War.BULLET_RATE);
			if (isLimited())
			{
				move(0, -War.BULLET_RATE);
				setDirectStatus(2);
			}
		}
		else if (directStatus == 2)
		{
			move(-War.BULLET_RATE, 0);
			if (isLimited())
			{
				move(War.BULLET_RATE, 0);
				setDirectStatus(0);
			}
		}
		else
		{
			move(War.BULLET_RATE, 0);
			if (isLimited())
			{
				move(-War.BULLET_RATE, 0);
				setDirectStatus(1);
			}
		}
	}
	public boolean	isLimited()
	{
		//受墙阻挡
		if (wallManager.collidesWith(this))
		{
			return true;
		}
		//受边界阻挡
		if (getX() < War.WAR_FIELD_LEFT || getX() > War.WAR_FIELD_LEFT + War.WAR_FIELD_WIDTH - War.BULLET_WIDTH || getY() < War.WAR_FIELD_TOP || getY() > War.WAR_FIELD_TOP + War.WAR_FIELD_HEIGHT - War.BULLET_HEIGHT)
		{//检查子弹是否超界
			return true;
		}
		return false;
	}
	public void collidesChecking()
	{
		if (enemyManager.collidesWith(this))
		{
			setVisible(false);
		}
	}
}