责任链

src/com/demo/tank/course8/Bullet.java

@@ -6,7 +6,7 @@ import com.demo.tank.util.ResourceManager;
 
 import java.awt.*;
 
-public class Bullet {
+public class Bullet extends GameObject{
     private int x, y;
     private Direction direction;
     private static final int SPEED = 10;
@@ -28,12 +28,12 @@ public class Bullet {
         rect.y = this.y;
         rect.width = Bullet.WIDTH;
         rect.height = Bullet.HEIGHT;
-        gm.bullets.add(this);
+        gm.add(this);
     }
 
     public void paint(Graphics g){
         if(!live){
-            gm.bullets.remove(this);
+            gm.remove(this);
         }
         switch (direction){
             case UP:
@@ -82,7 +82,7 @@ public class Bullet {
             //爆炸
             int ex = tank.getX() + Tank.WIDTH/2 - Explode.WIDTH/2;
             int ey = tank.getY() + Tank.HEIGHT/2 - Explode.HEIGHT/2;
-            gm.explodes.add(new Explode(ex, ey , gm));
+            gm.add(new Explode(ex, ey , gm));
         }
     }
 

src/com/demo/tank/course8/BulletTankCollider.java

@@ -0,0 +1,16 @@
+package com.demo.tank.course8;
+
+public class BulletTankCollider implements Collider{
+    @Override
+    public void collide(GameObject g1, GameObject g2) {
+        if(g1 instanceof Bullet && g2 instanceof Tank){
+            Bullet b = (Bullet) g1;
+            Tank t = (Tank) g2;
+            b.collideWith(t);
+        }else if(g1 instanceof Tank && g2 instanceof Bullet){
+            collide(g2, g1);
+        }else{
+            return;
+        }
+    }
+}

src/com/demo/tank/course8/Collider.java

@@ -0,0 +1,5 @@
+package com.demo.tank.course8;
+
+public interface Collider {
+    void collide(GameObject g1, GameObject g2);
+}

src/com/demo/tank/course8/ColliderChain.java

@@ -0,0 +1,23 @@
+package com.demo.tank.course8;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class ColliderChain {
+    private List<Collider> colliders = new LinkedList<>();
+
+    public ColliderChain(){
+        add(new BulletTankCollider());
+        add(new TankTankCollider());
+    }
+
+    public void add(Collider collider){
+        colliders.add(collider);
+    }
+
+    public void collide(GameObject g1, GameObject g2) {
+        for (Collider c : colliders){
+            c.collide(g1, g2);
+        }
+    }
+}

src/com/demo/tank/course8/Explode.java

@@ -5,7 +5,7 @@ import com.demo.tank.util.ResourceManager;
 
 import java.awt.*;
 
-public class Explode {
+public class Explode extends GameObject{
     private int x, y;
     public static final int WIDTH = ResourceManager.explodes[0].getWidth();
     public static final int HEIGHT = ResourceManager.explodes[0].getHeight();
@@ -24,7 +24,7 @@ public class Explode {
         g.drawImage(ResourceManager.explodes[step++], x, y, null);
         if(step >= ResourceManager.explodes.length){
             //播放完爆炸效果图片， remove
-            gm.explodes.remove(this);
+            gm.remove(this);
         }
     }
 

src/com/demo/tank/course8/GameModel.java

@@ -10,57 +10,41 @@ import java.util.List;
 
 public class GameModel {
     Tank tank = new Tank(380, 660, Direction.UP, Group.GOOD,this);
-    //    Bullet bullet = new Bullet(520, 440, Direction.UP);
-    List<Bullet> bullets = new ArrayList();
-    List<Tank> enemyTanks = new ArrayList<>();
+    private List<GameObject> gameObjects = new ArrayList<>();
 
-    List<Explode> explodes = new ArrayList<>();
+//    Collider collider = new BulletTankCollider();
+//    Collider collider2 = new TankTankCollider();
+    ColliderChain chain = new ColliderChain();
 
     public GameModel(){
         int enemyTankNum = PropertyManager.getInt("enemy.tank.number");
         for(int i = 0; i < enemyTankNum; i++){
-            enemyTanks.add(new Tank(50 + i*80, 200, Direction.DOWN, Group.BAD, this));
+            add(new Tank(50 + i*80, 200, Direction.DOWN, Group.BAD, this));
         }
     }
 
-    public void paint(Graphics g){
-        //打印出子弹数量
-        Color color = g.getColor();
-        g.setColor(Color.WHITE);
-        g.drawString("当前子弹数量:" + bullets.size(), 60, 50);
-        g.drawString("当前敌人数量:" + enemyTanks.size(), 60, 80);
-        g.drawString("当前爆炸数量:" + explodes.size(), 60, 100);
-        g.setColor(color);
+    public void add(GameObject go){
+        gameObjects.add(go);
+    }
 
-        tank.paint(g);
+    public void remove(GameObject go){
+        gameObjects.remove(go);
+    }
 
-        for(int i = 0; i< enemyTanks.size(); i++){
-            enemyTanks.get(i).paint(g);
-        }
+    public void paint(Graphics g){
+        tank.paint(g);
 
-        for (int i = 0; i< bullets.size(); i++){
-            bullets.get(i).paint(g);
+        for(int i = 0; i< gameObjects.size(); i++){
+            gameObjects.get(i).paint(g);
         }
 
         //碰撞检测
-        for(int i = 0; i< bullets.size(); i++){
-            for(int j=0; j< enemyTanks.size(); j++){
-                bullets.get(i).collideWith(enemyTanks.get(j));
+        for(int i = 0; i< gameObjects.size(); i++){
+            for(int j=i+1; j< gameObjects.size(); j++){
+               GameObject g1 = gameObjects.get(i);
+               GameObject g2 = gameObjects.get(j);
+               chain.collide(g1, g2);
             }
         }
-
-        for (int i = 0; i< explodes.size(); i++){
-            explodes.get(i).paint(g);
-        }
-//        for(Iterator<Bullet> it = bullets.iterator(); it.hasNext();){
-//            Bullet b = it.next();
-//            if(!b.isLive()){
-//                it.remove();
-//            }
-//        }
-//
-//        for (Bullet b : bullets){
-//            b.paint(g);
-//        }
     }
 }

src/com/demo/tank/course8/GameObject.java

@@ -0,0 +1,8 @@
+package com.demo.tank.course8;
+
+import java.awt.*;
+
+public abstract class GameObject {
+    int x, y;
+    public abstract void paint(Graphics g);
+}

src/com/demo/tank/course8/Tank.java

@@ -7,7 +7,7 @@ import com.demo.tank.util.ResourceManager;
 import java.awt.*;
 import java.util.Random;
 
-public class Tank {
+public class Tank extends GameObject{
     private int x,y;
     private Direction dir;
     private static final int SPEED = 8;
@@ -38,7 +38,6 @@ public class Tank {
 //            String className = PropertyManager.getString("good.tank.fire.strategy");
             try {
                 fireStrategy = (FireStrategy) Class.forName("com.demo.tank.course8.FourDirectionFireStrategy").newInstance();
-                System.out.println(fireStrategy);
             } catch (ClassNotFoundException e) {
                 e.printStackTrace();
             } catch (InstantiationException e) {
@@ -49,8 +48,9 @@ public class Tank {
         }else if(this.group == Group.BAD) fireStrategy = new DefaultFireStrategy();
     }
 
+    @Override
     public void paint(Graphics g) {
-        if(!living) gm.enemyTanks.remove(this);
+        if(!living) gm.remove(this);
         //根据方向绘制坦克
         switch (dir){
             case UP:

src/com/demo/tank/course8/TankTankCollider.java

@@ -0,0 +1,23 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Direction;
+
+import java.util.Random;
+
+public class TankTankCollider implements Collider{
+    Random random = new Random();
+    @Override
+    public void collide(GameObject g1, GameObject g2) {
+        if(g1 instanceof Tank && g2 instanceof Tank){
+            Tank t1 = (Tank) g1;
+            Tank t2 = (Tank) g2;
+            if(t1.rect.intersects(t2.rect)){
+                // simple deal
+                t1.setDir(Direction.values()[random.nextInt(4)]);
+                t2.setDir(Direction.values()[random.nextInt(4)]);
+            }
+        }else{
+            return;
+        }
+    }
+}