我正在寻找一些能让我在AutoCAD中自动“重建”一个或多个样条线的功能。我的图纸有数百个样条,每个样条有30-50个控制顶点。这使得绘图使用起来非常缓慢,尤其是在与一组样条直接交互时。
我有我想做的基本代码,但目前还不确定如何在AutoLISP中使用cvrebuild命令。在命令行中使用该命令只需启动GUI。请参阅下面的代码,了解我目前的情况。
我只想使用变量n_controlvertices和degree作为参数来调用cvrebuild命令。 AutoLISP例程将一次遍历一个对象,并使用相同的参数重建它们。
我为代码的外观道歉。显然,AutoLISP与StackOverflow不兼容
;; Batch rebuild splines
;;defines command name and variables
(defun c:batchrebuild(/ ss n obj n_controlvertices degree)
;; asks for selection
(提示 “\ n选择要重建的样条线。” )
;;decides if any splines are selected, and if not selects all
(if(not(setq ss(ssget'((0。“SPLINE”))))) (setq ss(ssget“_X”'((0。“SPLINE”)))) )
;;sets allowable entry to [2 (only nonzero) + 4 (only positive)]
(initget 6)
;;asks for number of fit points. if nothing is entered, it gives it the default value of 20
(setq n_controlvertices(getint“\ n nn of control vertices< 20>:”))
(如果
(= n_controlvertices nil)
(setq n_controlvertices 20)
(setq n_controlvertices(fix n_controlvertices))
)
;;asks for degree of fit points. if nothing is entered, it gives it the default value of 3
(setq degree(getint“\ nDegree of fit points< 3>:”))
(如果
(=度无)
(setq学位3)
(setq degree(fix degree))
)
(重复(setq n(sslength ss))
(setq obj (vlax-ename->vla-object (ssname ss (setq n (1- n))))
;;(command cvrebuild)
;;This is the part that I am not sure about
)
(PRINC) )
答案 0 :(得分:1)
这是一种方式。 它调用CVREBUILD(-CVREBUILD)的命令行版本。 它处理用户输入设置的系统变量。
;; Batch rebuild splines
;;defines command name and variables
(defun c:batchrebuild (/ ss n obj n_controlvertices degree rebuild2doption rebuild2ddegree rebuild2dcv cmdecho)
;; asks for selection
(prompt "\nSelect splines to be rebuilt.")
;;decides if any splines are selected, and if not selects all
(or (setq ss (ssget '((0 . "SPLINE"))))
(setq ss (ssget "_X" '((0 . "SPLINE"))))
)
;; checks if the selection is not empty
(if ss
(progn
;;sets allowable entry to [2 (only nonzero) + 4 (only positive)
(initget 6)
;;asks for number of fit points. if nothing is entered, it gives it the default value of 20
(setq n_controlvertices
(cond
((getint "\nNumber of control vertices<20>: "))
(T 20)
)
)
;;asks for degree of fit points. if nothing is entered, it gives it the default value of 3
(setq degree (cond
((getint "\nDegree of fit points<3>: "))
(T 3)
)
)
;; saves the sysvars current values
(setq rebuild2doption (getvar "REBUILD2DOPTION")
rebuild2ddegree (getvar "REBUILD2DDEGREE")
rebuild2dcv (getvar "REBUILD2DCV")
cmdecho (getvar "CMDECHO")
)
;; sets the sysvars values according to user inputs
(setvar "REBUILD2DOPTION" 1)
(setvar "REBUILD2DDEGREE" degree)
(setvar "REBUILD2DCV" n_controlvertices)
(setvar "CMDECHO" 0)
;; rebuilds the selected splines
(repeat (setq n (sslength ss))
(command "_-cvrebuild" (ssname ss (setq n (1- n))))
)
;; restores sysvars initial values
(setvar "REBUILD2DOPTION" rebuild2doption)
(setvar "REBUILD2DDEGREE" rebuild2ddegree)
(setvar "REBUILD2DCV" rebuild2dcv)
(setvar "CMDECHO" cmdecho)
)
)
(princ)
)