Laya:鼠标事件实现节点（图片等）沿着贝塞尔曲线移动

效果：鼠标在舞台上拖动，黄色三角形沿着红色贝塞尔曲线移动

语言：AS3
完整代码：在main.as中实例并调用即可

//main.as中的调用代码
var bz:BezierPath1=new BezierPath1();
bz.x=50;
bz.y=50;
Laya.stage.addChild(bz);
bz.init();

//代码块
package  {
    import laya.maths.Point;
    import laya.display.Sprite;
    import laya.maths.Bezier;
    import laya.events.Event;

    public class BezierPath1  extends Sprite{
        //初始化
        public function init(): void {          
            this.addChild(logo)
            //画三角形
            logo.pos(10, 10)    
            logo.graphics.drawPoly(-10, -20, [0, 50, 25, 0, 50, 50], "#ffff00");    
            //起始点、拉力点、终点
            var points:Array = [logo.x, logo.y,400, 100, 100, 500]
            //使用贝塞尔曲线工具类生成60个点
            var array:Array = Bezier.I.getBezierPoints(points, 60)
            console.log("array:", array)
            for(var i:int = 0;i<array.length;i=i+2){
                pointArray.push(new Point(array[i],array[i+1]));
            }

            //画轨道
            for(i= 0;i<pointArray.length;i=i+2){
                var logo1: Sprite = new Sprite();
                this.addChild(logo1)
                logo1.graphics.drawCircle(pointArray[i].x, pointArray[i].y, 2, 'red')
            }   
            //添加舞台点击事件
            Laya.stage.on(Event.MOUSE_DOWN,this,onTouchDown);
        }
        private var logo: Sprite = new Sprite();
        private var pointArray:Array=[];
        private var mouseDownY:int=0;
        private var touchBeginIndex:int=0;
        private var curIndex:int=0;     
        public function onTouchDown(e:Event):void{
            mouseDownY =  Laya.stage.mouseY;
            touchBeginIndex = curIndex;
           //注册鼠标移动、抬起事件
            Laya.stage.on(Event.MOUSE_MOVE,this,onTouchMove);
            Laya.stage.on(Event.MOUSE_UP,this,onMouseUp);
            Laya.stage.on(Event.MOUSE_OUT,this,onMouseUp);
        } 

        public function onTouchMove(e:Event):void{
             var curY:Number = Laya.stage.mouseY;
             var delta:Number = curY-mouseDownY;
             //计算移动速率
             curIndex = touchBeginIndex+Math.floor(delta/6); //拖动和移动速度
             if(curIndex<0){
                curIndex+=pointArray.length-1;//到尾部
             }
             if(curIndex>pointArray.length-1){//到头部
                curIndex-=pointArray.length-1
             } 
             //修改三角形位置
             logo.pos(pointArray[curIndex].x, pointArray[curIndex].y) 
        } 
        public function onMouseUp(e:Event):void{
            //解绑事件
            Laya.stage.off(Event.MOUSE_MOVE,this,onTouchMove);
            Laya.stage.off(Event.MOUSE_UP,this,onMouseUp);
            Laya.stage.off(Event.MOUSE_OUT,this,onMouseUp);
        } 
    }

     
}

参考链接：https://blog.csdn.net/nicepainkiller/article/details/91390452