crow.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 java.util.Random;
import com.lovo.pig.view.MainFrame;

/**
 * 乌鸦
 * @author gonggang
 */
public class Crow {
	private MainFrame mf;
	private Random rand = new Random();
	//乌鸦位置
	public int x = 0,y;
	
	public Crow(MainFrame mf){
		this.mf = mf;
		y = rand.nextInt(100) + 150;//乌鸦初始位置随机
	}
	//乌鸦图像下标
	private int indexImg = 0;
	//乌鸦被击中两次后,将飞回去(向左飞)
	public int hp = 2;
	
	public void draw(Graphics g){
		g.drawImage(mf.images.getImgCrow()[indexImg],x,y, null);
		move();
	}
	private void move(){
		if(hp > 0){//向右飞
			indexImg ++;
			x += 10;
			if(indexImg > 9){//反复使用前十张图像
				indexImg = 0;
			}
		}else {
			indexImg ++;
			//切换成乌鸦被击中的图像
			if(indexImg < 10){
				indexImg = 10;
			}
			if(indexImg > 23){
				//乌鸦被击中的四张图像只绘制一次,然后反复绘制向左飞的图像
				indexImg = 14;
			}
			x -= 10;
		}
		if(x > 800 || x < 0){
			mf.crows.remove(this);
		}
	}
	
	/**
     * 返回狼边界矩形,用于碰撞检测
     * @return
     */
	public Rectangle getRect(){
		Rectangle rect = new Rectangle(x,y + 20,
				mf.images.getImgCrow()[indexImg].getWidth(null) - 20,
				mf.images.getImgCrow()[indexImg].getHeight(null)- 40
				);
		return rect;
	} 
}