程序:- (defun err(msg)
- (princ msg)
- (command "_.undo" "e")
- (command "u")
- (setq *error* errtmp)
- (setvar "osmode" os)
- (princ "请建立Center层!")
- (princ)
- )(defun GetVal(fun msg key flag vla_tmp / val)
- (if (not (eval vla_tmp))
- (progn
- (initget key (if flag flag ""))
- (setq val (fun (strcat msg ":")))
- )
- (progn
- (initget key (if flag (1- flag) ""))
- (setq val (fun (strcat msg "<" (rtos (eval vla_tmp)) ">:")))
- (if (not val) (setq val (eval vla_tmp)))
- )
- )
- (set vla_tmp val)
- )(defun c:lw( / d d2 pt lay)
- (setvar "cmdecho" 0)
- (command "_.undo" "be")
- (setq errtmp *error*)
- (setq *error* err)
- (setq ty_tmp d_tmp)
- (setq d (getval getreal "外螺纹,输入直径或[内螺纹(I)]" "I" 7 'ty_tmp))
- (if (= d "I")
- (progn
- (setq d (getval getreal "内螺纹,输入直径" "" 7 'd_tmp))
- (setq d2 (/ d 1.1))
- )
- (setq d2 (* d 1.1))
- )
- (initget 1)
- (setq pt (getpoint "输入中心:"))
- (setq os (getvar "osmode"))
- (setvar "osmode" 0)
- (command "_.circle" pt (/ d 2.0))
- (command "_.arc" "c" pt (polar pt (/ pi 18.0) (/ d2 2.0)) (polar pt (+ (/ (* pi 3.0) 2.0) (/ pi 18.0)) (/ d2 2.0)))
- (setq lay (getvar "clayer"))
- (command "_.clayer" "Center")
- (command "_.line" (polar pt (/ pi 2.0) (* 5.0 (/ d 7.0))) (polar pt (/ (* pi 3.0) 2.0) (* 5.0 (/ d 7.0))) "")
- (command "_.line" (polar pt 0 (* 5.0 (/ d 7.0))) (polar pt pi (* 5.0 (/ d 7.0))) "")
- (command "_.clayer" lay)
- (command "_.undo" "e")
- (setq *error* errtmp)
- (setvar "osmode" os)
- (princ)
- )
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