package
{
 import flash.display.Sprite;
 import flash.events.MouseEvent;
 
 public class animation_ch04_CurveThroughPoint extends Sprite
 {
  private var x0:Number = 100;
  private var y0:Number = 200;
  private var x1:Number;
  private var y1:Number;
  private var x2:Number = 300;
  private var y2:Number = 200;

  public function animation_ch04_CurveThroughPoint()
  {
   init();
  }
  
//@ init(s0
  private function init():void
  {
   stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
  }
//@ move(s)
  
  private function onMouseMove(event:MouseEvent):void
  {
   x1 = mouseX * 2 - (x0 + x2) / 2;
   y1 = mouseY * 2 - (y0 + y2) / 2;
   graphics.clear();
   graphics.lineStyle(1);
   graphics.moveTo(x0, y0);
   graphics.curveTo(x1, y1, x2, y2);
  }
 }
}