ShootGame测评1.ppt

软件的业务需求分析 ShootGame 英雄机Hero 敌机Airplane 蜜蜂Bee 子弹Bullet 软件概要设计 数据建模：使用一个数据模型，描述对象的关系，使用绘图坐标系作为参考模型，英雄机，敌机，蜜蜂，子弹都是矩形区域。 飞行物的区域 类的设计 创建抽象父类（飞行物） protected int x; protected int y; protected int width; protected int height; protected BufferedImage image; 创建抽象父类（飞行物） //飞行物走一步 public abstract void step (); //敌人（敌机、小蜜蜂）被子弹打 this:敌人，bullet：子弹 public boolean shootBy(Bullet bullet){ int x =bullet.x; int y =bullet.y; 创建抽象父类（飞行物） return xthis.x xthis.x+this.width ythis.y ythis.y+this.height; public abstract boolean outOfBounds(); 得分接口 public interface Enemy {//得分接口 int getScore();//得分 奖励接口 public interface Award { int DOUBLE_FIRE = 0;//双倍火力值 int LIFE = 1;//生命 int getType(); 英雄机 public class Hero extends FlyingObject private int life; private int doubleFire; private BufferedImage[] images; private int index; 英雄机 public Hero(){ image=ShootGame.hero0; width=image.getWidth(); height=image.getHeight(); x=150; y=400; 英雄机 life=3; doubleFire=0; images=new BufferedImage[] {ShootGame.hero0,ShootGame.hero1}; index=0; public void step(){ image=images[index++/10%images.length]; 英雄机与敌人碰撞this:英雄机 other:敌人 public boolean hit(FlyingObject other){ int x1= other.x-this.width/2; int x2= other.x+other.width+this.width/2; int y1=other.y-this.height/2; int y2=other.y+other.height+this.height/2; 英雄机与敌人碰撞this:英雄机 other:敌人 int hx=this.x+this.width/2; int hy=this.y+this.height/2; return hxx1 hxx2 hyy1 hyy2; 敌机 public class Airplane extends FlyingObject implements Enemy private int speed = 2; public Airplane(){ image=ShootGame.airplane; width=image.getWidth(); height=image.getHeight(); 敌机 Random rand =new Random(); x=rand.nextInt(ShootGame.WIDTH-this.width); y=-this.height; 蜜蜂 public class Bee extends FlyingObject implements Award private int xSpeed=1;//x坐标 private int ySpeed=2;//y坐标 private int awardType;//奖励类型 子弹 public class Bullet extends FlyingObject private i