LayaAir 自轉的小球圍繞着鼠標轉動

一個自轉的小球 就像是地球

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;
	}
}

而後它開始圍繞着鼠標(太陽) 轉動

class Main{

    private ball:Ball;
    private speed:number = 0.1; //旋轉的速度
    private radius:number = 50; //半徑, 小球距離鼠標的距離
    private angle:number=0; //角度

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

    private onEnterFrame():void{
        //圍繞着鼠標位置 進行環繞運動
        this.ball.x = Laya.stage.mouseX+Math.cos(this.angle)*this.radius;
        this.ball.y = Laya.stage.mouseY+Math.sin(this.angle)*this.radius;
        this.angle += this.speed; //角度越大 轉動的越快
    }
}
new Main();