??? ???????? ?????????? ?????????? ??? here pglsa ??????? , ????????? ??????? ?? ?????????? ??????? ?????? ????? ????????? ???? ??? 3D ???????? ??? pglsa ??????? ??? ??????????? pglisa ????? : ?????????????????? ?????? ?????????? ????????????? pg????? ?????????????????? ?????????? ????? ??????????????? ?????????? ???????? ???