package 
{
 import flash.display.Graphics;1076837207.as
 import flash.display.Sprite;
 import flash.events.*;
 /**
  * …
  * @author …
  */
 public class PreLoader extends Sprite
 {
  var circleToMask:Sprite = new Sprite();
  var circle:Sprite = new Sprite();
  var circleMask:Sprite = new Sprite();
  var percentage:Number = 0;
  var tper:Number = 0;
  var i:Number = 0;
  public function PreLoader(x:Number,y:Number)
  {
   //큰원을 그린다.
   circleToMask.graphics.beginFill(16755370);
   circleToMask.graphics.drawCircle(0, 0, 10);
   circleToMask.graphics.endFill();
   addChild(circleToMask);
   //그속에 하얀색 원을 작게 하나 그린다.
   circle.graphics.beginFill(0xffffff);
   circle.graphics.drawCircle(0, 0, 7);
   circle.graphics.endFill();
   
   //그리고 큰원에 마스크를 준다.
   addChild(circleToMask);
   addChild(circle);
   addChild(circleMask);
   circle.x = x;//(circle.x = x);
   circle.y = y;//(circle.y = y);
   circleToMask.x = (circleMask.x = x);
   circleToMask.y = (circleMask.y = y);
   circleToMask.mask = circleMask;
   
   addEventListener(Event.ENTER_FRAME, function (_arg1:Event):void{
    if(i >=100) i=0;
    i++;
    circleMask.rotation = (i/20)/(Math.PI/180)
    trace(circleToMask.rotation);
   })
   
  }
  public function SetStep(percentage:Number):void
  {
   
   graphics.clear();
   // Percentage should be between 0 and 1
   tper = percentage < 0 ? 0 : (percentage > 1 ? 1 : percentage);
   
   
   // Draw the masked circle
   circleMask.graphics.clear();
   circleMask.graphics.beginFill(0);
   drawPieMask(circleMask.graphics, tper, 10, 0, 0, (-(Math.PI) / 2), 3);
   circleMask.graphics.endFill();
   // Increase percentage with margins so it appears to stop for a short while
   percentage = (percentage + 0.01);
   if (percentage > 1.05){
    percentage = -0.05;
   }
  }
  public function drawPieMask(graphics:Graphics, percentage:Number, radius:Number = 10, x:Number = 0, y:Number = 0, rotation:Number = 0, sides:int = 6):void {
   // graphics should have its beginFill function already called by now
   graphics.moveTo(x, y);
   if (sides < 3) sides = 3; // 3 sides minimum
   // Increase the length of the radius to cover the whole target
   radius /= Math.cos(1/sides * Math.PI);
   // Shortcut function
   var lineToRadians:Function = function(rads:Number):void {
    graphics.lineTo(Math.cos(rads) * radius + x, Math.sin(rads) * radius + y);
   };
   // Find how many sides we have to draw
   var sidesToDraw:int = Math.floor(percentage * sides);
   for (var i:int = 0; i <= sidesToDraw; i++)
    lineToRadians((i / sides) * (Math.PI * 2) + rotation);
   // Draw the last fractioned side
   if (percentage * sides != sidesToDraw)
    lineToRadians(percentage * (Math.PI * 2) + rotation);
  } 
 }
 
}