[]请大家帮助优化一下这个抛物线的代码

class Ball extends Laya.Sprite{



    private static cached:boolean = false;

    private body:Laya.Sprite;



    constructor(){

        super();

        this.init();

    }



    public init():void{

        if(!Ball.cached){

            Ball.cached = true;

            this.body = new Laya.Sprite();

            this.body.loadImage("war/ball.png");

            this.body.pivot(12,12);

        }

        this.addChild(this.body);

        Laya.timer.frameLoop(1,this,this.animate);    

    }



    private animate(e):void{

		this.body.rotation += 10;

	}

}

class Main{



    private ball:Ball;

    private targetX:number = 600;    

    private targetY:number = 300;  

    private centerX:number = 0;    

    private centerY:number = 0;  

    private angle:number = Math.PI;

    private angle2:number = 0;

    private radius:number = 150;  //半径

    private speed:number = .05;

    private points:Array<any> = ;

    private i:number = 0;



    constructor()

    {

			Laya.init(1100, 619, Laya.WebGL);

            Laya.loader.load("res/atlas/war.atlas",Laya.Handler.create(this,this.onLoaded),null,Laya.Loader.ATLAS);

    }



    private onLoaded():void{

            this.ball = new Ball();

            Laya.stage.addChild(this.ball);

		    this.ball.x = Laya.stage.width / 2;

		    this.ball.y = Laya.stage.height / 2;

            Laya.stage.on(Laya.Event.CLICK,this,this.onClick);

            Laya.timer.frameLoop(1,this,this.onEnterFrame);

    }



    private onEnterFrame():void{

        if(this.points.length>0){

            if(this.i<this.points.length){

                this.ball.x = this.points[this.i].x;

                this.ball.y = this.points[this.i].y;

                this.i++;

            }

        }        

    }



    private onClick():void{



        // //角度归位

        // this.angle = Math.PI;



        // //小球归位

         this.ball.x = Laya.stage.width / 2;

		 this.ball.y = Laya.stage.height / 2;



        // //获取鼠标位置

         this.targetX = Laya.stage.mouseX;

         this.targetY = Laya.stage.mouseY;



        // //获得偏移

        // let dx:number = this.targetX - this.ball.x;

        // let dy:number = this.targetY - this.ball.y;

        var ps = [{ x: 0, y: 200 }, { x: 300, y: 0 },{ x: 700, y: 300 }];

        this.points = CreateBezierPoints(ps,20);

        this.i = 0;





        // let distance:number = Math.sqrt(dx*dx+dy*dy)/2;  //中心点的距离 两点距离/2

        // this.angle2 = Math.atan2(dy,dx);  //中心点的角度 和目标点一直 在一条直线上



        // this.radius = distance;



        // //获取中心店的坐标

        // this.centerX = this.ball.x + Math.cos(this.angle2)*distance;

        // this.centerY = this.ball.y + Math.sin(this.angle2)*distance;

 

    }

}





function CreateBezierPoints(anchorpoints, pointsAmount) {

    var points = ;

    for (var i = 0; i < pointsAmount; i++) {

        var point = MultiPointBezier(anchorpoints, i / pointsAmount);

        points.push(point);

    }

    return points;

}



function MultiPointBezier(points, t) {

    var len = points.length;

    var x = 0, y = 0;

    var erxiangshi = function (start, end) {

        var cs = 1, bcs = 1;

        while (end > 0) {

            cs *= start;

            bcs *= end;

            start--;

            end--;

        }

        return (cs / bcs);

    };

    for (var i = 0; i < len; i++) {

        var point = points[i];

        x += point.x * Math.pow((1 - t), (len - 1 - i)) * Math.pow(t, i) * (erxiangshi(len - 1, i));

        y += point.y * Math.pow((1 - t), (len - 1 - i)) * Math.pow(t, i) * (erxiangshi(len - 1, i));

    }

    return { x: x, y: y };

}



new Main(); [/i]