(DEFUN ENT_FROM (E / SS SN);返回自实体E之后生成的实体选择集 (IF (/= (TYPE E) (quote ENAME)) (ALERT "Parameter ERROR in ENT_FROM") ) (SETQ SS (SSADD)) (WHILE E (SETQ E (ENTNEXT E)) (IF E (PROGN (SETQ SN (CDR (ASSOC 0 (ENTGET E)))) (IF (NOT (MEMBER SN (quote ("ATTRIB" "VERTEX" "SEQEND" ) ) ) ) (SETQ SS (SSADD E SS)) ) ) ) ) SS )