class ShakeTool1 {    private static instance: ShakeTool1;   //单例    public static getInstance(): ShakeTool1 {        if (this.instance == null) {            this.instance = new ShakeTool1();        }        return this.instance;    }    private checkForMinimumValues: boolean = true;    private minShakeValue: number = 0.001;    private minRotationValue: number = 0.001;    /**屏幕震动 */    public ShakeScreen() {        Main.Instance.getSceneRoot().x = 0        Main.Instance.getSceneRoot().y = 0        ShakeTool1.getInstance().DoShake_Internal(Main.Instance.getSceneRoot(),            2, //震动次数            new egret.Point(0.5, 0.5), //x,y轴的震动系数[-1,1]            new egret.Point(1, 1), //x,y轴的震动量级            0,  //旋转量级             8, //震动x.y轴的最大偏移量            50, //如果速度越快，则振幅越剧烈            1 //振幅的递减系数        )    }	/**	 * 屏幕震动	 * @param camera 震动对象	 * @param numberOfShakes 震动次数	 * @param seed   x,y轴的震动系数[-1,1]	 * @param shakeAmount  x,y轴的震动量级	 * @param rotationAmount  旋转量级  如果小于0表示:不旋转	 * @param distance   震动x.y轴的最大偏移量	 * @param speed 如果速度越快，则振幅越剧烈	 * @param decay 振幅的递减系数	 * @param endCallBack 结束回调	 * 	 */    public DoShake_Internal(cam: egret.DisplayObject, numberOfShakes: number, seed: egret.Point, shakeAmount: egret.Point,        rotationAmount: number, distance: number, speed: number,        decay: number, endCallBack: Function = null) {        if (cam == null)            return        var defaultPointY = cam.x        var defaultPointX = cam.y        var defaultRotation = cam.rotation        // Set random values        var mod1 = seed.x > 0.5 ? 1 : -1;        var mod2 = seed.y > 0.5 ? 1 : -1;        var currentShakes = numberOfShakes        var shakeDistance = distance;        let shakePosition: egret.Point        let shakeRotation: egret.Point        let guiShakePosition: egret.Point        let rotationStrength = 1;        let start1: egret.Point = new egret.Point(0, 0)        let startR: egret.Point = new egret.Point(0, 0)        let startTime = 0        let timeOnEnterFrame = -1        let curTime: number = 0        let resetEvent = () => {            cam.x = defaultPointY            cam.y = defaultPointY            cam.rotation = defaultRotation            cam.removeEventListener(egret.Event.ENTER_FRAME, updateEvent, this)            if (endCallBack != null) {                endCallBack()            }        }        let updateEvent = () => {            var now = egret.getTimer();            var time = timeOnEnterFrame;            var pass = (now - time) / 1000;            if (timeOnEnterFrame == -1) {                timeOnEnterFrame = now;                return            }            else {                timeOnEnterFrame = now;            }            curTime += pass            curTime = curTime * speed            if (this.checkForMinimumValues) {                if (rotationStrength <= this.minRotationValue) {                    resetEvent()                    return                }                if (distance != 0 && shakeDistance <= this.minShakeValue) {                    resetEvent()                    return;                }                if (currentShakes <= 0) {                    resetEvent()                    return;                }            }            if (cam == null) {                return            }            cam.x = defaultPointY + mod1 * Math.sin(curTime) * (shakeAmount.x * shakeDistance)            cam.y = defaultPointX + mod2 * Math.cos(curTime) * (shakeAmount.y * shakeDistance)            if (rotationAmount > 0) {                cam.rotation = defaultRotation + Math.cos(curTime) * (rotationAmount * rotationStrength)            }            if (curTime > Math.PI * 2) {                curTime = 0;                shakeDistance *= (1 - Tools.Mathf.Clamp01(decay));                rotationStrength *= (1 - Tools.Mathf.Clamp01(decay));                currentShakes--;            }        }        cam.addEventListener(egret.Event.ENTER_FRAME, updateEvent, this);    }}