[LayaAirIDE 2.0]（实现手指控制模型的缩放旋转）触控可以识别 但是导入的模型没有根据触控反应

根据官方示例Demo所做 但是模型没有反应  下面是项目代码  及其类库引用  还有运行效果  希望有所了解的给指点一下 多谢
class MultiTouch{
    private text:Laya.Text;
    private _upVector3:Laya.Vector3 = new Laya.Vector3(0, 1, 0);
constructor(){
        Laya.alertGlobalError = true;
this._upVector3 = new Laya.Vector3(0, 1, 0);
//初始化引擎
        Laya3D.init(0, 0);
        Laya.stage.scaleMode = Laya.Stage.SCALE_FULL;
        Laya.stage.screenMode = Laya.Stage.SCREEN_NONE;
            
        //预加载所有资源
        var resource = [{url: "Box/LayaScene_JJF/Conventional/JJF.lh"}];
        Laya.loader.create(resource, Laya.Handler.create(this, this.onComplete));
}
onComplete(){
//创建场景
        var scene = Laya.stage.addChild(new Laya.Scene3D());
        //创建相机
        var camera = new Laya.Camera(0, 0.1, 100);
        scene.addChild(camera);
        //设置相机的名称
        camera.name = "camera";
        //相机平移位置
        camera.transform.translate(new Laya.Vector3(0, 0.8, 1.5));
        //旋转相机
        camera.transform.rotate(new Laya.Vector3(-15, 0, 0), true, false);
            
        //创建平行光
        var directionLight = new Laya.DirectionLight();
        scene.addChild(directionLight);
        //设置平行光颜色
        directionLight.color = new Laya.Vector3(0.6, 0.6, 0.6);
            
        //加载小猴子精灵
        var monkey = Laya.Loader.getRes("Box/LayaScene_JJF/Conventional/JJF.lh");
        //猴子精灵添加组件（脚本）
        monkey.addComponent(MonkeyScript);
        scene.addChild(monkey);
        //设置相机的观察目标为小猴子
        camera.transform.lookAt(monkey.transform.position, new Laya.Vector3(0, 1, 0));
        this.text = new Laya.Text();    
        //设置文本显示框位置
        this.text.x = Laya.stage.width / 2 -50 ;
        this.text.text = "触控点归零";
        //显示文本显示框
        
        this.text.name = "ceshi";
        this.text.overflow = Laya.Text.HIDDEN;
        this.text.color = "#FFFFFF";
        this.text.font = "Impact";
        this.text.fontSize = 20;
        this.text.borderColor = "#FFFF00";
        this.text.x = Laya.stage.width / 2;
        Laya.stage.addChild(this.text);
}
}
//激活启动类
new MultiTouch();
class MonkeyScript extends Laya.Script3D{
    private _scene:Laya.Scene3D;
    private _text:Laya.Text;
    private _camera:Laya.Camera;
    private rotation:Laya.Vector3;
    private lastPosition:Laya.Vector2;
    private distance:number = 0.0;
    private disVector1:Laya.Vector2;
    private disVector2:Laya.Vector2;
    private isTwoTouch:boolean;
    private first:boolean;
    private twoFirst:boolean;
constructor(){
        super();
this._scene = null;
     this._text = null;
        this._camera = null;
        this.rotation = new Laya.Vector3(0, 0.01, 0);
     this.lastPosition = new Laya.Vector2(0, 0);
     this.distance = 0.0;
     this.disVector1 = new Laya.Vector2(0, 0);
     this.disVector2 = new Laya.Vector2(0, 0);
     this.isTwoTouch = false;
        this.first = true;
        this.twoFirst = true;
}
onStart(){
this._scene = this.owner.parent as Laya.Scene3D;
        this._text = this._scene.parent.getChildByName("ceshi") as Laya.Text;
        this._camera = this._scene.getChildByName("camera") as Laya.Camera;
}
onUpdate(){
var touchCount = this._scene.input.touchCount();
        if (1 === touchCount){
            //判断是否为两指触控，撤去一根手指后引发的touchCount===1
            if(this.isTwoTouch){
                return;
            }
            this._text.text = "触控点为1";
            //获取当前的触控点，数量为1
            var touch = this._scene.input.getTouch(0);
            //是否为新一次触碰，并未发生移动
            if (this.first){
                //获取触碰点的位置
                this.lastPosition.x = touch._position.x;
                this.lastPosition.y = touch._position.y;
                this.first = false;
            }
            else{
                //移动触碰点
                var deltaY = touch._position.y - this.lastPosition.y;
                var deltaX = touch._position.x - this.lastPosition.x;
                this.lastPosition.x = touch._position.x;
                this.lastPosition.y = touch._position.y;
                //根据移动的距离进行旋转
                (this.owner as Laya.Sprite3D).transform.rotate(new Laya.Vector3(1 * deltaY /2, 1 * deltaX / 2, 0), true, false);
            }
        }
        else if (2 === touchCount){
            this._text.text = "触控点为2";
            this.isTwoTouch = true;
            //获取两个触碰点
            var touch = this._scene.input.getTouch(0);
            var touch2 = this._scene.input.getTouch(1);
            //是否为新一次触碰，并未发生移动
            if (this.twoFirst){
                //获取触碰点的位置
                this.disVector1.x = touch.position.x - touch2.position.x;
                this.disVector1.y = touch.position.y - touch2.position.y;
                this.distance = Laya.Vector2.scalarLength(this.disVector1);
                this.twoFirst = false;
            }
            else{
                this.disVector2.x = touch.position.x - touch2.position.x;
                this.disVector2.y = touch.position.y - touch2.position.y;
                var distance2 = Laya.Vector2.scalarLength(this.disVector2);
                //根据移动的距离进行缩放
                this._camera.transform.translate(new Laya.Vector3(0, 0, -0.01 * (distance2 - this.distance)));
                this.distance = distance2;
            }   
        }
        else if (0 === touchCount){
            this._text.text = "触控点归零";
            this.first = true;
            this.twoFirst = true;
            this.lastPosition.x = 0;
            this.lastPosition.y = 0;
            this.isTwoTouch = false;
        }
}
onLateUpdate() {
    }
}