众所周知,在天正中可直接绘制箭头,而在AutoCAD中不得。最近我发现一个在命令行直接输入命令就可画出你想要的尺寸的箭头的方法,具体实施如下: 0Ge*\Q
hm3,?FMbq
1、首先拷贝下列lisp程序,用ar为名以记事本格式保存,然后改后缀名为.lsp,作为一个lisp程序文件;程序如下: 3#huC=zbf
QW#]i
(defun ureal (bit kwd msg def / inp) vzK*1R5
jT"P$0sJAd
(if def ;ZXP*M9
ATCFdtNc
(setq msg (strcat " " msg "<" (rtos def) ">: ") $r|R`n =
^6[KzE#*
bit (* 2 (fix (/ bit 2))) D5fJuT-bp
pg~vteq5
) P7QOlTQI
<h|XB}s+
(if (= " " (substr msg (strlen msg) 1)) H `y.jSNi
2
P+RfE`o
(setq msg (strcat " " (substr msg 1 (1- (strlen msg))) ": ")) ;Q&38qI
u8qL?Aj^
(setq msg (strcat " " msg ": ")) WRU/^g3O@'
k%E9r'Ac
) #\N?ka}!
gP8Fe =]
) ta"/R@ k*
5,`U3na,
(initget bit kwd) wVkms
K y~
9's
(setq inp (getreal msg)) kB1]_v/
)~xL_yW_X
(if inp inp def) H|;6K`O_
JbpKstc;
) -
{<`Z
Onb*nm
(defun upoint (bit kwd msg def bpt / inp) *I%r
R9&T0Q