用Matrix对象来实现Display Object水平或垂直翻转的函数：
public function flipHorizontal(dsp:DisplayObject):void { var matrix:Matrix = dsp.transform.matrix; matrix.a=-1; matrix.tx=dsp.width+dsp.x; dsp.transform.matrix=matrix; } public function flipVertical(dsp:DisplayObject):void { var matrix:Matrix = dsp.transform.matrix; matrix.d=-1; matrix.ty=dsp.height+dsp.y; dsp.transform.matrix=matrix; }
