坦克大战（一期）-设计模式-责任链应用1.2

src/main/java/com/msb/chain/ColliderChain.java

@@ -20,7 +20,7 @@ import java.util.List;
  *@Date 2022/10/11 17:55
  *@Version 3.0
  */
-public class ColliderChain {
+public class ColliderChain implements Collider {
     List<Collider> colliders = new LinkedList<>();
 
     public ColliderChain() {
@@ -36,9 +36,11 @@ public class ColliderChain {
         return colliders;
     }
 
-    public void collide(GameObject o1, GameObject o2) {
+    @Override
+    public boolean collide(GameObject o1, GameObject o2) {
         for (Collider collider : colliders) {
-            collider.collide(o1, o2);
+            if( ! collider.collide(o1, o2)) return false;
         }
+        return true;
     }
 }

src/main/java/com/msb/inter/Collider.java

@@ -9,5 +9,5 @@ import com.msb.model.abstracts.GameObject;
  * @Version: 1.0
  */
 public interface Collider {
-    public void collide(GameObject o1, GameObject o2);
+    public boolean collide(GameObject o1, GameObject o2);
 }

src/main/java/com/msb/inter/impl/BulletTankCollider.java

@@ -19,20 +19,21 @@ import com.msb.model.abstracts.GameObject;
  */
 public class BulletTankCollider implements Collider {
     @Override
-    public void collide(GameObject o1, GameObject o2) {
+    public boolean collide(GameObject o1, GameObject o2) {
         if(o1 instanceof Bullet && o2 instanceof Tank) {
             Bullet bullet = (Bullet) o1;
             Tank tank = (Tank) o2;
-            if(bullet.getGroup() == tank.getGroup()) return;
+            if(bullet.getGroup() == tank.getGroup()) return true;  //没有撞继续执行
 
             if(bullet.getRectangle().intersects(tank.getRectangle())) {
                 bullet.die();
                 tank.die();
             }
+            return false;    //撞上就不再向下执行了
         } else if (o1 instanceof Tank && o2 instanceof Bullet) {
-            collide(o2, o1);
+            return collide(o2, o1);
         } else {
-            return;
+            return true;
         }
     }
 }

src/main/java/com/msb/inter/impl/TankTankCollider.java

@@ -18,7 +18,7 @@ import com.msb.model.abstracts.GameObject;
  */
 public class TankTankCollider implements Collider {
     @Override
-    public void collide(GameObject o1, GameObject o2) {
+    public boolean collide(GameObject o1, GameObject o2) {
         if(o1 instanceof Tank && o2 instanceof Tank) {
             Tank tank1 = (Tank) o1;
             Tank tank2 = (Tank) o2;
@@ -26,8 +26,9 @@ public class TankTankCollider implements Collider {
                 tank1.goBack();
                 tank2.goBack();
             }
+            return true;   //坦克与坦克相撞，坦克不会消失，所以责任链应该继续
         } else {
-            return;
+            return true;
         }
     }
 }