 
 	public class DataUtils
 	{
-		private static const HALF_PI:Number = Math.PI * 0.5;
-		private static const DOUBLE_PI:Number = Math.PI * 2;
-		
 		private static const _helpMatrix:Matrix = new Matrix();
 		
 		public static function xmlToObject(xml:XML, listNames:Vector.<String> = null):Object

		{
			if(keepScale)
			{
				matrix.a = transform.scX * Math.cos(transform.skY)
				matrix.b = transform.scX * Math.sin(transform.skY)
				matrix.c = -transform.scY * Math.sin(transform.skX);
				matrix.d = transform.scY * Math.cos(transform.skX);
				matrix.tx = transform.x;
				matrix.ty = transform.y;
			}
			else
			{
				matrix.a = Math.cos(transform.skY)
				matrix.b = Math.sin(transform.skY)
				matrix.c = -Math.sin(transform.skX);
				matrix.d = Math.cos(transform.skX);
				matrix.tx = transform.x;
				matrix.ty = transform.y;
			}

			}
		}
		
		// 计算相对父节点的相对Transform
		private static function calculateFrameTransform(animationData:Object, armatureData:Object, boneData:Object, frameData:Object):void
		{
			var parentBoneData:Object = findBoneData(armatureData, boneData.parent);
