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{LZYk
CB6<Vng}C
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: e>MC
3D`5
rbs:qLa%
(defun ureal (bit kwd msg def / inp) qM]eK\q 1
lB3W|-Ci
(if def !7Ta Vx}`(
l*/I ;a$
(setq msg (strcat " " msg "<" (rtos def) ">: ") 7X1T9'jI2
@-)?2CH[8
bit (* 2 (fix (/ bit 2))) \~U8<z
`&j5/[>v
) mVW:]|!s
rsA K0R+
(if (= " " (substr msg (strlen msg) 1)) g)2}`}
|WlWZ8]
(setq msg (strcat " " (substr msg 1 (1- (strlen msg))) ": ")) nIKh<ws4z
[,$] %|6wt
(setq msg (strcat " " msg ": ")) l *.#g
:SziQQ
) Ll%[}C?~]?
E_7N^htv
) RCo!sZP}
GuNzrKDr
(initget bit kwd) \h?C
G_|]
g!cTG-bh>J
(setq inp (getreal msg)) @'s^
t%V!SvT8+
(if inp inp def) $_% a=0
-T`rk~A9A
) .[NB"\<q
F3i+t+Jt
(defun upoint (bit kwd msg def bpt / inp) V-Oy<
iLNKC'
(if def uI!rJc>TX
=gw'MA
(setq pts (strcat DHd9yP9-
M)#aX|%Mh
(rtos (car def)) Bc`jkO.q
6ix8P;;}#
"," >7p?^*&7;
g%Sl+gWdJ
(rtos (cadr def)) #\_N-bVu
.B+R+2uY3
(if 4(f[Z9 iZ]
a2SMNC]
(and (caddr def) (= 0 (getvar "FLATLAND"))) v&;q4b4
OV_Y`u7YR
(strcat "," (rtos (caddr def))) nGZZCsf <
0V@u]
"" 7H %>\^A^
W
MU9tq[
) odD^xg"L
=rMT1
) 67wY_\m 9I
4#1[i|:M
msg (strcat " " msg "<" pts ">: ") k^:)|Z
bx_`S#*N
bit (* 2 (fix (/ bit 2))) K*xqQ]&
^OnU;8IC
) w$MFCJ:p&
BxS\"W
(if (= " " (substr msg (strlen msg) 1)) N.vt5WP
$e)d!m.
(setq msg (strcat " " (substr msg 1 (1- (strlen msg))) ": ")) =*
oFs|v
TL-sxED,,D
(setq msg (strcat " " msg ": ")) oi^2Pvauh
!`LaX!bmp
) i<@6f'Kir
dbQUW#<Q
) ]h3<r8D_#
D6=Z%h\*
(initget bit kwd) rXPq'k'h#-
hy3j8?66
(setq inp B&ItA76
aVNBF`
(if bpt 8QDs4Bv|
~za=yZo7(
(getpoint msg bpt) `z=U-v'H)D
`$vTGkGpY
(getpoint msg) N}HQvlLkF9
:L*"OT7(6
) KHV5V3q4
#; CC"
) 'Alt+O_
#Mkwd5S|L
(if inp inp def) Y_tLSOD#/
C8 9c2
) {>PN}fk2QP
Ir'(GB
(setq cm(getvar "cmdecho")) `?r]OVe{y
Dvbrpn!sk
(setvar "cmdecho" 0) G5a PjP
6;6a.iZ
(defun C:AR ( / #dwgsc w v pt1 pt2 pt3 )
AV{3f`
J6J[\
(if(= arscl nil)(setq arscl 0.1875)) +RWP;rk
o=@0Bd8
(setq #dwgsc(getvar "DIMSCALE") 3C'`K,
(7/fsfsF
W(getvar "PLINEWID") x(pq!+~K
G347&F)
V(getvar "OSMODE") 1henQiIO
.@KpN*`KH
L(getvar "CLAYER")) 0goKiPx
)[_A{#&