[as3] Displacement filter, 可以玩放大，mapping 等等 February 18, 2011July 2, 2022 放大 http://www.emanueleferonato.com/2009/08/12/pure-as3-magnifying-effect-using-displacement-map-filter/ mapping http://www.emanueleferonato.com/2007/12/03/understanding-flash-displacement-map-filter/