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本帖最后由 xiangzanyang 于 2016-5-12 23:02 编辑
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ug三维中的圆,在制图投影导出到CAD中总是变成了样条线,每次标直径尺寸都要用三点描圆,很是麻烦,我做了个小程序,分享给大家,可以在CAD中把样条变成圆,比三点描圆快多了,且可以一次多选!
样条成圆.rar
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) _0 i- p4 `( ]1 W9 D/ |% A8 g' o+ P) u* cAUTO CAD加载解压后的LISP程序,CAD命令行输入:YY启动命令!
$ r# r0 l0 k) {# j, p程序如下:" v: |* N; x% m/ c5 Y$ m/ J
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(defun c:yy (/ ss object oname fitplt spt1 spt2 spt3
& G" B: ~; }' d' v spen object2 clo i dd linw lint3 H4 o7 H2 r; D
lay a b fixpoint jj colo$ S, s0 c! O/ P8 S& @4 a
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(vl-load-com)
6 Y% w. Y. r: n# E% s (setq ss (ssget '((0 . "SPLINE"))))
4 @ i. C2 g. ^ (repeat (setq i (sslength ss))
) @$ C1 [) G! F3 M% J7 i (setq object (vlax-ename->vla-object (ssname ss (setq i (1- i)))))) K& ]- m1 E9 n% }* [& ^
(setq clo (vla-get-closed object))
% B* ?) h8 |- b; K2 g (setq colo (vla-get-color object))
9 ]; J4 G* Q8 B7 K1 D4 b# Q (setq lay (vla-get-layer object)). D- u; c9 v. ^2 h- p5 S
(setq lint (vla-get-linetype object))& D# I; T8 j0 T& g- `& z
(setq linw (vla-get-lineweight object))- ~& q3 H# A( H
(if (= (vla-get-splinemethod object) 1)9 g; [: A; S6 p* n4 z5 I9 \! }
(vla-put-splinemethod object 0)1 H, ~& ]' ~: ~# B8 I- q" w1 q, M
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(setq fixpoint (vla-get-numberoffitpoints object))+ F6 J- K. H( \" B8 Y9 S! H; u
(setq fitplt (vlax-safearray->list
' o! F' v& g/ x0 o4 y (vlax-variant-value (vla-get-fitpoints object))
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(repeat fixpoint5 B3 u* j' N) u i2 T. [
(setq b nil)
5 Q& t9 j2 A4 ]- d& w% K& d (repeat 3
0 ~3 O* F1 H$ s9 Z (setq b (append b (list (car fitplt)))
. t. m+ t( \$ \ P* x! K- x7 I fitplt (cdr fitplt)
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(setq a (append a (list b)))
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(cond ((= clo :vlax-true)9 s# ^8 Y: s: [) ^2 B
(progn) W0 G0 J8 f- S ]2 {/ L. v/ I! w
(setq jj (fix (+ (/ fixpoint 3) 0.5)))
* S7 a7 t* B' Z (setq spt1 (3dpoint->2dpoint(car a)))
3 ]- r0 e* Z: {+ F (setq spt2 (3dpoint->2dpoint(nth jj a)))6 y8 r' `1 h4 F# N
(setq spt3 (3dpoint->2dpoint(nth (* jj 2) a)))# D# l- ^# t) [8 z! A$ k" Z4 a
(vl-cmdf "circle" "3p" spt1 spt2 spt3)3 \1 j! Y% U o0 K; ~4 X7 b
)
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((= clo :vlax-false)
( J2 }" [1 W& @9 G (progn' S& {8 O9 b* M' f4 \' u7 J- W
(setq dd (fix (+ (/ fixpoint 2) 0.5)))/ {: y: M+ H2 M8 k4 J I3 k8 F* _
(setq spt1 (3dpoint->2dpoint(car a)))7 _) m- \" E9 I. d
(setq spt2 (3dpoint->2dpoint(nth dd a)))$ p0 p* q% a' q( L/ \
(setq spt3 (3dpoint->2dpoint(nth (- fixpoint 1) a))): w, Q3 i, U$ Z* H+ y
(vl-cmdf "arc" spt1 spt2 spt3)) l- m) K9 M' n1 }3 y. D
)
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(setq a nil), V( ?7 Y7 g9 Q. {4 _, ^
(setq fitplt nil)/ w) h" ?( u4 @4 e
(setq fixpoint nil)
- T1 Q2 Q0 F5 z: t V7 y (setq b nil)
3 x+ N7 \4 _9 G, m4 ?/ c& t (setq spen (entlast))/ i, C. o* J, v- t K* ^
(setq object2 (vlax-ename->vla-object spen))4 B, C2 p9 b+ g; Q8 @) A
(vla-put-layer object2 lay)4 W. t# Z; s3 n* b
(vla-put-linetype object2 lint)
# n% ~4 O* Y9 c i* B# T (vla-put-lineweight object2 linw)- n9 G8 A, C2 y) i# j- @2 |1 w' M
(vla-put-color object2 colo)
/ _; x1 N# ] L0 U% ~: } (vla-delete object)
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7 [5 v. D- f- O(defun 3dpoint->2dpoint (3dpt)4 K1 ?0 t- t! X- ^1 v" j3 K
(if (apply 'and (mapcar 'numberp 3dpt))" A ^! [6 g6 t8 |2 e" c1 [# D5 d
(mapcar '+ 3dpt '(0.00 0.00))
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