|
|
发表于 2007-10-31 14:22:12
|
显示全部楼层
来自： 中国江苏徐州
下面是本人编制的一个LSP，可以完成这个工作，把它复制到CAD的surport目录下的acad2006.lsp文件中，使用时只要打入命令ee，然后选择要延长的两直线就可以自动生成延长线了：1 r' M$ b: o+ R* F e+ s
& t( R/ |' y6 E9 [;画两直线的延长线到交点$ E h+ Y, G4 q0 n" R2 b
(defun c:ee(/ pt1 pt2 pt3 pt4 ip fl1 fl2 b1 b2 os)
+ U/ ]9 O2 z9 A+ X (setq os (getvar "osmode"))
2 D( R1 Y1 j+ n G (setvar "osmode" 0)
+ j( l, }( @6 u (setq fl1 (car (entsel "\n选择第一条直线")))
+ k7 {' G# b) Z* p0 m (while (or (= fl1 nil) (/= "LINE" (cdr (assoc 0 (entget fl1)))))
9 J( P; K8 t" }6 @8 Q. E3 v! U (setq fl1 (car (entsel "\n没有选择或选择的不是直线，重新选择:")))9 Y# e2 p y: Y- Y
)4 P& y+ X' S% Q- B& g, g
(setq fl2 (car (entsel "\n选择第二条直线")))
1 {: ]# P: ~) I- v) X0 K3 y (while (or (= fl2 nil) (/= "LINE" (cdr (assoc 0 (entget fl2)))))/ @9 A2 x7 d2 C( s5 r
(setq fl2 (car (entsel "\n没有选择或选择的不是直线，重新选择:")))* K$ Q' c" O; u9 N# y& ? W
)4 ]; c3 S% p7 T& `2 Q
(setq pt1 (cdr (assoc 10 (entget fl1))))! u- f+ c1 b5 R4 {" E
(setq pt2 (cdr (assoc 11 (entget fl1))))
) w* k: N+ X+ e0 _8 J: U' y3 W (setq pt3 (cdr (assoc 10 (entget fl2))))
g8 h0 t; K/ M9 G, j* l (setq pt4 (cdr (assoc 11 (entget fl2))))
- K3 G3 m8 u' b% ^4 o* Z
) c/ |- b7 W! T: k2 _' c (setq ip (inters pt1 pt2 pt3 pt4 nil))
8 a8 B: P8 Q6 m( b( L0 k" }
( `. z a; |8 ]0 W" `3 ~6 G (if (= ip nil)) q+ H! |9 _6 g* L, q0 o
(progn$ ^0 W \: H1 h# V3 H' F
(princ "\n\n两直线平行无交点!")
+ u+ n5 b- n( l/ l! V" { (exit))1 n/ n3 w2 y! J6 ], V
)2 O7 m" E7 B: E
( p8 O N: g* I' G- Z/ E s (if (or (and (> (car ip)
, M5 \/ W$ M; r; L' D (car pt1))
9 m$ I( }0 Q. V+ P& P (> (car ip)/ f% r# ]( m! X/ y9 e
(car pt2)))
4 J' R! \: F) E9 E$ X (and (< (car ip)! `3 `) B/ |9 _9 Z) W7 M. B6 }' J
(car pt1))
& G7 L5 O7 h: l, _, k8 b' J8 J (< (car ip)
" v2 _4 G3 t, K: M; {2 h7 ` (car pt2))))
* K7 ]5 Q( x! q$ X% l8 _& i/ { (setq b1 nil)0 }. i! J) o' _
(setq b1 t)
1 A2 f I* D$ E$ V ), r: j5 ^/ z1 z, }1 D. c
(if (or (and (> (car ip) (car pt3))
$ m( Q, q: a* J$ s- }- m2 S8 S (> (car ip) (car pt4)))
: Z! T( j8 J2 n' o( z. t (and (< (car ip) (car pt3))( Q/ q& W; h$ \8 ]
(< (car ip) (car pt4))))( ~( A4 I: a: m' a0 a. j
(setq b2 nil) ;交点不在直线二上
+ _, i; I. q4 X/ M2 d9 U$ f (setq b2 t) ;交点在直线二上8 x( T" H- e5 E4 G: {
)
8 e3 {# A% a% J1 c" L; L
5 Z6 J h! e% V$ s* } (if (= b1 T) ;if
, q, g1 Q& J, _; }- @2 _ ;then+ c" y( k O1 N$ b% ?$ g$ {
(if (= b2 T) a m' u5 G" d, k1 c5 f& |$ ~# c
(princ "\n\n两直线已经有交点!\n")
% k& ^$ x' s' [' ^) l (progn ;在第一条直线上，不在第二条直线上1 E/ P8 w0 I: u `0 F9 {
(if (> (distance ip pt3)
- k8 l. l) c+ m (distance ip pt4))# Q- I6 G. A' I( h! U
(command "line" ip pt4 "")
- {/ \( q1 z- j; e; B# \3 ^; N+ U (command "line" ip pt3 ""))1 |6 S4 E( a# T" V
)+ f8 f& A9 }( E- Q
) ;else
% x" S6 X7 H9 u8 ^" ?+ f7 z' p7 c (if (= b2 T)
: z$ Q' |5 K; ^% {: `$ }& @. V (if (> (distance ip pt1) ;不在第一条直线上，在第二条直线上6 W4 u4 i2 T/ C% F& v
(distance ip pt2))" ]) R+ k* Z) V( ]$ ?
(command "line" ip pt2 "")
7 a6 z$ Y- g) |$ f, K: j; e (command "line" ip pt1 ""))* h$ [: ]+ E* d9 c
(progn ;与两直线都没有交点
4 j( h' [7 \0 n9 ^7 L& W5 O. v (if (> (distance ip pt3)
: S B. @' r' E (distance ip pt4))
, D) x+ A8 `9 D6 c1 d+ X) L5 O (command "line" ip pt4 "")5 p J9 W. n# l1 d( J# |
(command "line" ip pt3 "")) g: E9 U3 |4 h" G( K3 Y/ E
(if (> (distance ip pt1)
: B5 l' w* e( [( b (distance ip pt2))
# Z3 D& [8 L T w( P3 M8 d (command "line" ip pt2 "")! f1 |: Z. B( x& F9 ^. E* [/ C
(command "line" ip pt1 ""))
2 R3 u6 z- u8 `8 F7 x4 E6 m, D )+ k( P C+ j. D0 ?) e
)
4 X' e: J8 P D F$ Z5 ^ )
/ h8 j( R& X; t1 t (setvar "osmode" os)' |) W+ y* \5 e' C8 ^2 Z1 j i# {
(princ)' ^' c/ }& p1 E
) |
|
