bullet.java

BravePiglet.rar 勇敢的猪Java游戏 由本人原创

package com.lovo.pig.model;

import java.awt.Graphics;
import java.awt.Rectangle;

import com.lovo.pig.view.MainFrame;

public class Bullet {
	private MainFrame mf;
	//子弹位置
	public  int x = 680,y;
	//子弹是否可见(飞出窗口或击中目标时不可见)
	public boolean visible = true;
	
	public Bullet(MainFrame mf,int y){
		this.mf = mf;
		this.y = y;
	}

	/**
	 * 绘制子弹
	 * @param g
	 */
	public void draw(Graphics g) {
		//可见时绘制子弹
		if(visible){//加20校正误差
			g.drawImage(mf.images.getImgBullet(),x,y,null);	
		}else{//不可见时清除子弹
			mf.bullets.remove(this);
		}
		move();
	}

	/**
	 * 移动
	 */
	public void move(){
		if(x >= 0){//未出窗口时移动
		    x = x - 25;
		}else if(x < 0){//飞出窗口时设为不可见
	    	  visible = false;
	      }
	}
    
	/**
	 * 返回子弹边界矩形,用于碰撞检测
	 * @return
	 */
	public Rectangle getRect(){
		Rectangle rect = new Rectangle(x,mf.currentPig.pigY,
				mf.images.getImgBullet().getWidth(null),
				mf.images.getImgBullet().getHeight(null)
				);
		return rect;
	}
}