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: X}Oe 'y
9`*ST(0/
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: @U_CnhPQq
I<#X#_YP
(defun ureal (bit kwd msg def / inp) s/7Z.\
fd
)v{OC
(if def +aOdaNcI
d1cp=RbC
(setq msg (strcat " " msg "<" (rtos def) ">: ")
Ey:68yU
Fx:38Ae
bit (* 2 (fix (/ bit 2))) ~X3g_<b_8
}:2##<"\t
) relt7 sK
2Xe1qzvo
(if (= " " (substr msg (strlen msg) 1)) |]9@JdmV
hW#^H5?
(setq msg (strcat " " (substr msg 1 (1- (strlen msg))) ": ")) I0+6p8,
hS,&Nj+
(setq msg (strcat " " msg ": ")) a?-&O$UHf\
zFjz%:0
) K83'`W^
76 !LMNf
) w-n}&f
,ucRQ&P
(initget bit kwd) bG]0|
qnp}#BZ
(setq inp (getreal msg)) &3t973=
>`AK'K8{M
(if inp inp def) (m R)o&Y%,
(I~
) -Rpra0o.
C
LFax$CZc
(defun upoint (bit kwd msg def bpt / inp) e{E\YEc
UQDAql
(if def nB`|VYmOP1
q}t]lD
%C
(setq pts (strcat z,aMbgt
=Ydrct
(rtos (car def)) @/s|<*
j,i9,oF6]
"," v%:deaF
#+ch
(rtos (cadr def)) ~P'.R.e
GURiW42
(if un 5r9
hP)Zm%@0f
(and (caddr def) (= 0 (getvar "FLATLAND"))) 5REFz
t1w]L
(strcat "," (rtos (caddr def))) DC h
!Z{I
\#,2#BmO"E
"" ?z.?(xZ 6
#KiJ{w'
) Z{B
e
K;6#v%
) Q'n+K5&p
],weqs
msg (strcat " " msg "<" pts ">: ") zpwoK&T+
A;L
]=J
bit (* 2 (fix (/ bit 2))) vL@<l^`$0
2 q4p-
) (}39f
gL_1~"3KGC
(if (= " " (substr msg (strlen msg) 1)) f0H.$UAL
vqN/ crJ@
(setq msg (strcat " " (substr msg 1 (1- (strlen msg))) ": ")) x#`p.sfVo
PgA<pfEHE
(setq msg (strcat " " msg ": ")) _[R(9KyF0f
n0lOq
) <J<"`xKL
e;`(*
) PRU&y/zZmG
+bE{g@%@+
(initget bit kwd) R$awo/'^
/F;2wT;
(setq inp vcFR Td
K? o p3}f?
(if bpt ee?
d?:L
ZR\N~.
(getpoint msg bpt) 1gV?}'jq
HXU#Ux
(getpoint msg) 0;l~B
NVx>^5QV
) @/^<9
G[ U5R?/
) a=}1`Q
>T]9.`xhK
(if inp inp def) h,$CJdDY]
GKFRZWXdT
) nms[No?
x6,ozun
(setq cm(getvar "cmdecho")) cjN)3L{
+%XByY5
(setvar "cmdecho" 0) @ ;!IPiU
;D~#|CB
(defun C:AR ( / #dwgsc w v pt1 pt2 pt3 ) RTh=x.
R:f!ywj%
(if(= arscl nil)(setq arscl 0.1875)) )G)6D"5,+G
trDw|WA
(setq #dwgsc(getvar "DIMSCALE") Zp/+F(
y-26\eY^P
W(getvar "PLINEWID") OM1Z}%J
G{[w+ObX
V(getvar "OSMODE") O4X03fUx
<KX9>e
L(getvar "CLAYER")) znE1t%V
p(pfJ^/:(
(setq arscl(ureal 7 "" "请输入箭头长度" arscl)) |^-D&C(Eu
c~tl0XU1
(setvar "OSMODE" 1) %w^*7Oi
:O413#8
(setq pt1 (upoint 1 "" "指定箭头顶点" nil nil)) T*/I4"
<\epj=OclV
(setvar "OSMODE" 512) F2
B(PGa7
FQ4R>@@5
(setq PT(entsel " 选择直线上要画箭头一端的任意一点")) b+a+OI D
[@9S-$Xa
(setq PT2(cadr PT)) `:=1*7)?
5)< Y3nU~
(setq ED(entget(car PT))) z"
tz-~
F%
n}vA`
(setq PT3 (polar PT1 (angle PT1 PT2) (* #dwgsc arscl))) (Huvo9
#8h7C8]&
(command "PLINE" pt1 "w" "0" (* #dwgsc (/ arscl 3)) pt3 "") D\5+2 G
In1{&sS
(setvar "OSMODE" V) 79 ;uHR&S