as3中颜色矩阵滤镜ColorMatrixFilter的使用

		public static function changeSpGray():Array { 
			var filter:ColorMatrixFilter;
			var filterArr:Array = [];
			var matrix:Array = [];
			matrix = matrix.concat([0.3086, 0.6094, 0.0820, 0, 0]);//red
			matrix = matrix.concat([0.3086, 0.6094, 0.0820, 0, 0]);//green
			matrix = matrix.concat([0.3086, 0.6094, 0.0820, 0, 0]);//blue
			matrix = matrix.concat([0, 0, 0, 1, 0]);//alpha
			filter = new ColorMatrixFilter(matrix);
			filterArr.push(filter);
			return filterArr;
		}