修复Vector2.zero引起的引用混乱问题

demo/src/Scenes/LineCasting/LineCaster.ts

@@ -10,7 +10,7 @@ module samples {
         private _pixelShape2: egret.Shape;
         private _lineShape: egret.Shape;
         private _pixelShape3: egret.Shape;
-        private _delayTime = 1;
+        private _delayTime = 0.2;
         private _pressTime = 0;
         private _canTouch = true;
 

demo/src/Scenes/Ninja Adventure/NinjaAdventureScene.ts

@@ -2,14 +2,12 @@ module samples {
     import CircleCollider = es.CircleCollider;
     import Flags = es.Flags;
     import SpriteRenderer = es.SpriteRenderer;
+    import ProjectileHitDetector = es.ProjectileHitDetector;
+    import FollowCamera = es.FollowCamera;
 
     export class NinjaAdventureScene extends SampleScene {
-        constructor() {
-            super(true, true);
-        }
-
-        public initialize(): void {
-            super.initialize();
+        public async onStart() {
+            super.onStart();
 
             let playerEntity = this.createEntity("player");
             playerEntity.position = new es.Vector2(256, 224);
@@ -21,12 +19,22 @@ module samples {
             // 移动到第1层 保证自己的图层不会如果增加攻击方式则不会攻击到自身
             Flags.setFlagExclusive(collider.physicsLayer, 1);
 
+            this.camera.entity.addComponent(new FollowCamera(playerEntity));
+
             this.content.loadRes("moon_png").then(moonTexture => {
                 let moonEntity = this.createEntity("moon");
                 moonEntity.position = new es.Vector2(412, 460);
                 moonEntity.addComponent(new SpriteRenderer(moonTexture));
+                moonEntity.addComponent(new ProjectileHitDetector());
                 moonEntity.addComponent(new CircleCollider());
             });
         }
+
+        public update(){
+            super.update();
+
+            this.findEntity("player").position.x -= es.Time.deltaTime * 10;
+            this.findEntity("player").position.y -= es.Time.deltaTime * 10;
+        }
     }
 }

demo/src/Scenes/Ninja Adventure/ProjectileHitDetector.ts

@@ -0,0 +1,30 @@
+module es {
+    /**
+     * 简单的组件，可以检测它是否被弹丸击中。当被击中时，它会闪烁并在被击中一定次数后自我毁灭。
+     */
+    export class ProjectileHitDetector extends Component implements ITriggerListener{
+        public hitsUntilDead: number = 10;
+        public _hitCounter: number;
+        public _sprite: SpriteRenderer;
+
+        public onAddedToEntity(): void {
+            this._sprite = this.entity.getComponent<SpriteRenderer>(SpriteRenderer);
+        }
+
+        public onTriggerEnter(other: es.Collider, local: es.Collider): any {
+            this._hitCounter ++;
+            if (this.hitsUntilDead >= this.hitsUntilDead){
+                this.entity.destroy();
+                return;
+            }
+
+            this._sprite.color = 0xFF0000;
+            Core.schedule(0.1, false, this, timer => {
+               this._sprite.color = 0x000000;
+            });
+        }
+
+        public onTriggerExit(other: es.Collider, local: es.Collider): any {
+        }
+    }
+}