.#merg12072cvs

java编写的打鸟游戏

/*
 * Bird.java
 *
 * Created on 2007年12月19日, 上午11:41
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 *实现了鸟类的移动（在move方法实现）
 *当鸟类飞出界面或者被击中后掉落到屏幕外，调用reset方法重新刷出一只鸟
 *draw函数重载了父类里面的draw方法，实现了图像的刷新
 */

package graphics;
import SBGameCore.*;
import java.awt.Point;
import java.util.Random;
import java.awt.Graphics;


/**
 *
 * @author Saerdna
 */

public class Bird extends Comp{
    int[] randomYSpeed = new int[]{2,-1,0,-2,1};//{0,0,0,0,0};//Y方向的速度数组
    int[] randomXSpeed = new int[]{2,5,9};//{0,0,0};//X方向的速度数组
    public static boolean[] pathUsed = new boolean[]{false,false,false,false,false,false,false};
    int[] randomPosition = new int[]{60,150,240,330,420,510,600};//出现的路径的数组，把Y轴分成7个区域
    int num;//保存鸟类图片的序号
    int pathID;//保存选择的路径的序号
    /**
     * Creates a new instance of Bird
     */
    public Bird(GraphicsPanel a) {
        this.a = a;
        w = 100;//图片的宽度
        h = 100;//图片的高度
        
        Random rbird = new Random();//创建一个随机数对象
        int b = 0;
        //do{
        b = rbird.nextInt(7);//0~6这个整数数组中随机抽取一个数
        img = a.birds[b];//按照这个随机数选择一只鸟
        num = b;//保存鸟的序号
        
        if(b == 1 || b == 3){//如果是1号或者3号鸟，让他从左边飞出
            do{
                pathID = rbird.nextInt(7);//0~6这个整数数组中随机抽取一个数
            }while(pathUsed[pathID]);
            px = opx =  0;
            py = opy =  randomPosition[pathID];//按照这个随机数选择一条路径
            pathUsed[pathID] = true;
            face = 1;//代表从左向右飞
            
        }else{//如果是其他编号的鸟，让它从右边飞出
            do{
                pathID = rbird.nextInt(7);
            }while(pathUsed[pathID]);
            px = opx =  1000;
            py = opy =  randomPosition[pathID];
            pathUsed[pathID] = true;
            face = -1;//代表从右向左飞
            
        }
        
        Random rndv = new Random();
        int x = 0;
        x = rndv.nextInt(3);
        vx = randomXSpeed[x];//按照身成的随机数，从x方向速度的数组中抽取一个飞行速度
        
        active = true;//鸟是活鸟
        
        //k = (k+1)%7;
     /*   Random rndv = new Random();
          int x = 0;
        x = rndv.nextInt(3);
         vx = randomv[x];
        try {Thread.sleep(100);} catch(Exception e) {};
         int y = rndv.nextInt(3);
         vy = randomv[y];*/
    }
    
    public void move() {
        if(active){//如果是活鸟，就按照下述方法飞行
            opx = px;
            opy = py;
            px = px + vx * face;//vx*face，判别x的方向
            
            Random rnd = new Random();
            int x = 0;
            x = rnd.nextInt(5);
            py = randomYSpeed[x] + py;//按照随机生成的随机数，决定下一步y轴的飞行方向
            if(face == 1&&px == 1100)//如果左边的鸟飞出右边边界
                px=0;
            else if(face == -1 && px == -100)//如果右边的鸟飞出左边边界
                px = 1000;
        }else{
            die();//如果是死鸟，就按照die方法进行飞行
        }
    }
    
    
    public void draw(){
        set_draw_rectangles(a.paint_area,a.new_area);
        Graphics bg = a.buffer.getGraphics();
        bg.clipRect(a.paint_area.x,a.paint_area.y,w,h);
        bg.drawImage(a.backdrop,0,0,a);
        bg.dispose();
        
        bg = a.buffer.getGraphics();
        bg.clipRect(a.new_area.x,a.new_area.y,w,h);
        bg.drawImage(img,a.new_area.x,a.new_area.y,a);
        bg.dispose();
        
        a.paint_area.add(a.new_area);
        
        Graphics g = a.getGraphics();
        g.clipRect(a.paint_area.x,a.paint_area.y,a.paint_area.width,a.paint_area.height);
        g.drawImage(a.buffer,0,0,a);
        g.dispose();
    }
    public Point getPoint(){//得到鸟的当前所在的坐标
        return new Point(px,py);
    }
    
    public void reset(){//重置鸟类的飞行属性，类似构造方法中的操作
        active = true;//让死鸟变活，以下同构造函数中的描述
        Random rbird = new Random();
        int b = 0;
        b = rbird.nextInt(7);
        num = b;
        img = a.birds[b];
        if(num == 1 || num == 3){
            px = opx =  0;
            py = opy =  randomPosition[pathID];
            face = 1;
        }else{
            px = opx =  1000;
            py = opy =  randomPosition[pathID];
            face = -1;
        }
        
        Random rndv = new Random();
        int x = 0;
        x = rndv.nextInt(3);
        vx = randomXSpeed[x];
        
    }
    public void die(){//死鸟的飞行方法
        opx = px;
        opy = py;
        py = py - 10;//让他垂直下落
        if(py < -100 )
            reset();//当掉出屏幕外，重置
    }
    public void changeToDeadImage(){//当活鸟被击中后，更换图片
        img = a.deadbirds[num];
    }
    public int getScore(){//返回得分
        return vx*2;
    }
    public int getFace(){//返回鸟类飞行方向
        return face;
    }
    
}