[求助]：如何建立3D FACE的选择集

JQKA

有一个方框，属性是3D FACE，(setq   s(ssget (list '(0 . "3d face"))))应该不对
如何建立3D FACE的选择集??/

eachy

Command: _3dface Specify first point or [Invisible]:
Specify second point or [Invisible]:
Specify third point or [Invisible] <exit>:
Specify fourth point or [Invisible] <create three-sided face>:
Specify third point or [Invisible] <exit>:

Command:
Command: li LIST 1 found

                  3D FACE   Layer: "0"
                            Space: Model space
                   Handle = e5
             first point, X= 637.6520  Y= 575.7744  Z=   0.0000
            second point, X=1025.1862  Y= 680.4607  Z=   0.0000
             third point, X=1305.9508  Y= 441.4600  Z=   0.0000
            fourth point, X= 955.9836  Y= 147.1533  Z=   0.0000

Command: (entget (entlast))
((-1 . <Entity name: 7ef6bf68>) (0 . [B]"3DFACE"[/B]) (330 . <Entity name: 7ef6bcf8>)
(5 . "E5") (100 . "AcDbEntity") (67 . 0) (410 . "Model") (8 . "0") (100 .
"AcDbFace") (10 637.652 575.774 0.0) (11 1025.19 680.461 0.0) (12 1305.95
441.46 0.0) (13 955.984 147.153 0.0) (70 . 0))