package 
{
    import flash.display.MovieClip;
    import flash.events. * ;
    import flash.geom.PerspectiveProjection;
     public   class  Main extends MovieClip
    {
         private  var num: int = 50 ; // 一共有多少个螺旋点
         private  var numOfRotations: int = 3 ; // 圈数
         private  var anglePer:Number  =  ((Math.PI * 2 )  * numOfRotations)  /  num;
         private  var R: int = 400 ; // 半径
         private  var h: int = 0 ; // 高度
         private  var contain:MovieClip = new  MovieClip(); // 容器
         private  var list:Array = new  Array();
         public  function Main()
        {

init();
            creat3D();
        }
              
         private  function init(): void
        {
            root.transform.perspectiveProjection.fieldOfView = 100 ; // 初始化透视角度
            addChild(contain);
            contain.x = stage.stageWidth / 2 ;
            contain.y = stage.stageHeight / 2 - 800 ;
            contain.z = 1000 ;            
        }

// 创建螺旋效果
         private  function creat3D(): void
        {

for  (var i: int = 0 ; i < num; i ++ )
            {
                var image:photo = new  photo();
                list.push(image);
                contain.addChild(image);
                image.x = Math.cos(anglePer * i) * R;
                image.z = Math.sin(anglePer * i) * R;
                image.y = h += 30 ; // 每一个螺旋点都递增30
                image.rotationY  =  ( - i * anglePer)  *  ( 180 / Math.PI) + 90 ; // 偏移
                image.addEventListener(Event.ENTER_FRAME,Run);
            }
        }

private  function Run( event :Event): void
        {
            contain.rotationY += 0.01 ;
            sortZ();
        }

// 深度交互
         private  function sortZ(): void
        {
            list.sortOn( " z " ,Array.DESCENDING | Array.NUMERIC);
             for  (var i: int = 0 ; i < list.length; i ++ )
            {
                var myimage:photo = list[i];
                contain.setChildIndex(myimage,i);

}

}

}
}