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(defun errMsg (s)
, y; J: }( D0 w# s/ z$ u" w" ` (if (/= s "function cancelled") (princ (strcat "\nError: " s)))
! m `6 S+ V. F; F* z ; 当命令执行时出现错误, b5 Q3 Q' i6 R4 G
(setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
( f" H# p4 r, Z& a& h, L (setvar "osmode" osmold)
) b! h( v: ~9 L8 O7 g (setq *error* olderr) ; 恢复旧的错误处理- V; u; n1 n" O$ @( }
(princ)" d- l$ U' f, W# s; ^ p
)0 [2 E4 N, X, z2 }2 y
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
) t, z7 {& M& X2 t ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)
4 X2 H- G5 x! T ;-------------------------------------------------------------------# O% Y' n5 t/ \
; 获取公制外径大小、螺距总长 R) [# K; b7 ~ Q
; 然后计算一系列几何点- n! B! }- R9 `9 O, a2 V+ `
; 并且关闭对象捕捉、命令回显
8 E2 d9 c% m) g6 g9 V; r ;-------------------------------------------------------------------: J, \" E6 X( N6 Z' N5 h
(setq 4H (list 0.0015 0.002 0.002 0.0025 0.003 0.0035 0.004 0.005 0.006 0.007 0.008 0.009 0.010))
) t/ i- p8 U8 w" J M: d (setq 5H (list 0.002 0.0025 0.003 0.004 0.0045 0.0055 0.0065 0.0075 0.009 0.010 0.0115 0.0125 0.0135))
" ^ M# b* P5 M# b* d (setq 6H (list 0.003 0.004 0.0045 0.0055 0.0065 0.008 0.0095 0.011 0.0125 0.0145 0.016 0.018 0.020)) 7 n" O0 D& o$ o7 B" A( `6 J) B
(setq h6 (list -0.003 -0.004 -0.0045 -0.0055 -0.0065 -0.008 -0.0095 -0.011 -0.0125 -0.0145 -0.016 -0.018 -0.020))
* V0 s; G' }8 e8 E& Q" l0 Z3 p (setq g6 (list -0.005 -0.008 -0.0095 -0.0115 -0.0135 -0.017 -0.0195 -0.023 -0.0265 -0.0295 -0.033 -0.036 -0.0515))
7 D: J7 V$ i! f/ a' H3 i, T* l. ^ (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
% `' h0 N7 j: ~+ W% L! f2 w (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值' S% t5 ~2 G, r5 f, f1 P
(setvar "osmode" 0) ; 关闭对象捕捉 ( d) ~, [6 Q/ Q4 A
(setvar "cmdecho" 0) ; 关闭命令的回显, o' t4 V: `8 p3 c
$ o2 v" P: H6 p. b/ q2 l9 ?
(setq innerdiafactor 1.5) ; 设置内径系数3 S( a- Q5 U; t. |
(initget 7) ; radmid 必须非零、非空、非负7 S+ V# U2 ^7 U( u6 Y; U
(setq radmid (getdist "\n公制外径: "))
4 r) R6 s& Q" l. z. | (initget 7) ; threadpitch 必须非零、非空、非负% q4 z( G2 n* U# _; d
(setq threadpitch (getreal "\n螺距: "))
0 |" g& y; S& s5 T7 B# x (initget 1) ; ptStart 必须非空. w- S, K7 v0 T ^# y+ r2 D2 J: R
(setq ptStart (getpoint "\n起始点: "))& R. w: J! F. ]/ t/ ]2 \' g% y$ k8 |
(initget 3) ; threadlength 必须非零、非空、非负
- e( d$ R% Y) A2 ]: E9 w/ P (setq threadlength (getdist "\n螺纹总长(Y方向): "))
( N, Y! K- z$ @# w! Q t; 对公制外径添加公差) r, }6 d, t; d7 v& }" E
(if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置3 ]5 k/ O1 `6 E% _7 }, e- W, `
(if (<= radmid 6) (setq order 1)
- B3 c% {3 T' t (if (<= radmid 10) (setq order 2)
1 C( ?+ o' l a' P (if (<= radmid 18) (setq order 3)
2 C2 S5 P; I/ v' o- J4 m( D (if (<= radmid 30) (setq order 4)2 \$ j5 n5 v: Y- ]
(if (<= radmid 50) (setq order 5). d, { W) R0 @+ e2 o/ Q
(if (<= radmid 80) (setq order 6); `8 x- O3 P j2 N" N5 e
(if (<= radmid 120) (setq order 7)
! ]/ z! E/ j# }$ O& l7 s4 x6 R) b1 } (if (<= radmid 180) (setq order 8)
8 p1 M: T2 a& A( Q( _: A6 U# E/ B" G, N (if (<= radmid 250) (setq order 9)/ `. |; w; ?0 P4 z: G: Z& Z
(if (<= radmid 315) (setq order 10)2 n8 E2 B3 Z1 k" L
(if (<= radmid 400) (setq order 11)3 R F* }6 V7 l% \! N* w
(if (<= radmid 500) (setq order 12)
2 G9 t6 T* g* F; V% ] )))))))))))))
; u0 O& p5 t& T# ^9 L6 z9 v (if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带
/ s7 W- s/ o0 U- X: f (if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
: F! x$ N$ I& Y8 G+ k (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))$ _, V5 `5 L! h- p' h1 a% a
)))3 N5 M% q$ {+ {9 `; w% H' p
3 A ]2 ] [7 {! U' h; N' X
(setq h (* 0.866025 threadpitch)) ; 计算齿高
' J- ]% @' @6 \3 ?/ G" R (setq radouter (+ radmid (/ h 4))) ; 计算外径9 M5 [4 Q' p: i. y
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
! X+ |6 u0 c) E5 z (setq threadangle (+ 30 0)) ; 计算齿顶角
* A! q* t8 E" ]: q: I/ y (auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数6 i% w7 _# i. D$ J' z' I6 K
(princ "\n三维螺纹创建完成")
3 J% ~' ~# ~; q* n, {' t" a (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
* @6 @" t) [1 g" l$ { (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值
# G: W1 M$ l P4 v/ i. D5 W (princ)
- R& t* {9 k; S0 t4 p)
" G& n' J3 O" Y* }/ s% e3 p(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
7 m- }6 A. b; P& B3 W spt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)
' u+ p1 z) Y; u: U7 i) s ;(command "undo" "begin") ; 开始undo步骤/ E& B& \0 {3 g1 D7 j) V3 i
(setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)
; I5 U) C) m4 ~9 F: w, s6 p8 q: k pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))6 p2 D; c/ R5 t5 N& a+ k& {
pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
5 v5 G8 f+ _& }2 s0 i pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)7 M& B+ g$ k0 v0 K
pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
. Q. @; H" E& j, l; B% ^- } ang (angle pttmp1 pttmp3)) S+ v3 n: l/ z9 E) T1 c) g
pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)
& u6 M5 P# ]& r pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
; I7 k. f! {6 c3 r' d pt3a (polar pt1a ang radouter)6 H7 F) R+ _" M$ ] k: @
pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
* I+ _* V- r% e3 B pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))( Z3 i4 G* C v$ o2 t
pt3b (polar pt1b ang radouter), C' H9 R, O4 p6 `# ]; K- e. c
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)
6 |6 w) D- F. H2 Z pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)
: C& Z) ]/ Y) @/ e( q1 Q pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))# A1 e1 @& k, F8 D+ L
pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)0 P; t7 W j) c, G, C9 w
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)
: C( ?4 n& q0 w4 a7 w pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil), w8 Q; q* o6 C5 ^
pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))
8 o& V( E7 j1 ^2 R6 [ pttmp11 (polar ptStart (/ pi 2.0) threadpitch)6 W; R' e0 z9 E% J, a0 p
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
$ [/ H. T* D0 v8 A/ p6 b! R/ \ )
( O4 R& g, P: ^1 T, M+ M3 C/ j ;-------------------------------------------------------------------
4 D/ ^7 A. u, V$ l3 I ; 绘制两个倒置的并偏移1/2螺距的圆锥$ N, X4 v# w0 j
; 这两个圆锥都以中剖面剖分
8 z0 K3 _! ?/ Z; n2 ^$ ~ ; 进行并集运算
! |4 Z/ s9 q$ K1 m! _ ;-------------------------------------------------------------------
( E5 H2 V0 G |' Z0 W& _7 O! |; v(SETQ startcone "order")
# Z, L; ^* k8 O7 i(SETQ endcone "Y")
. I. x& f4 Z5 \ (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)
' U( ?: O) v, C, T3 v- ? (princ "\n正在绘制三维螺纹，请等待")
: m* a. o5 `- D7 U. |/ b9 S1 _& n {2 ] (command "pline" pttmp1 pttmp5 pttmp6 "c")
$ Z }6 K# H$ C (command "revolve" "l" "" pttmp5 pttmp6 "")
/ Z" i2 f @5 h& T) c7 t (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5). K. l% P6 E9 ?, p/ L
(command "slice" "l" "" pt1a pt3a pt1az pttmp3)( L- k, x6 A' k" [' r
(setq tstmp (ssadd (entlast))), n* ?- x0 `% i h
(command "pline" pttmp3 pttmp9 pttmp10 "c")
$ l, L0 K, U4 \ (command "revolve" "l" "" pttmp9 pttmp10 ""). k, ?7 q5 z( p; {3 |
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)
/ ]+ C: ?' |, r (command "slice" "l" "" pt1b pt3b pt1bz pttmp3)
6 S. I( ]" B4 F/ ~/ K0 E# @& x (setq tstmp (ssadd (entlast) tstmp))
( u) D$ d! v. u e (command "union" tstmp "")# F0 m% v3 c* A
;-------------------------------------------------------------------
# \& d& P! B/ H- i! c# n' R ; 上面的实体被剖切成两份，然后进行镜像以获得螺旋线的螺旋) t5 V" u5 A! w4 [9 s1 w+ W, N# }
; 单线的高度实际上等于两倍螺距，但是超出或者是在内部或者是; t: A% [ o* @
; 在最后一步被切除+ x! g; M+ [/ _0 \: T
;-------------------------------------------------------------------
+ l& T' s1 Z- B s0 \) g (command "slice" tstmp "" "xy" ptStart "b")8 i. I; v" m) ?+ Y# P4 t
(setq tstmp (ssadd (entlast) tstmp))2 O( B2 r- C. K* C$ \
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")3 m+ c/ W6 V, ~1 H
(command "union" tstmp "")) _3 v7 M2 E' u9 F& `/ M7 V
;-------------------------------------------------------------------8 B& b# m; L1 T( o0 _3 j/ |% \/ Z% C
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）* l) B+ l& [& E
; 得到的实体再切除到指定的螺旋高度$ h4 x$ r( W: m# q6 g/ G
;-------------------------------------------------------------------
! K( D: x! E! ?4 H9 O( Z7 K2 b (setq e (entlast))
1 s% b& |) V2 _5 l2 K; Z (command "array" tstmp "" "r" ttal 1 threadpitch)
0 P2 n6 s: ?. x (repeat (1- ttal)
; g9 S% e8 A9 Z. s) c) F- k (setq e (entnext e)
- A; ~4 k, z' i: l2 g5 L, f tstmp (ssadd e tstmp)9 @6 E/ p' C; |3 A8 e5 w
)
6 ]% V1 V: @/ ^# n( Q )
. w, Z# R4 s% f, J; V (command "union" tstmp "")8 F% G, d' d; k/ h k: t
; 若开始创建45度的圆锥
0 t2 o1 f. Y$ X1 x7 x2 ` (if (/= startcone "order")- P( `: Y4 p7 s9 T8 ~# I8 r
(progn (setq e (entlast))
) l' n. E. Q9 m2 A. k (command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart))); g9 C- C' j) a
(command "union" "l" e "")3 s" h3 w1 a( ^5 a. Y) \
)
7 ~* O- u& U: O* c6 M) P )9 F/ H% F3 E v' z* V( g
(command "slice" "l" "" "zx" pttmp11 pttmp12)# [2 t/ ^0 _: {$ j7 @2 i
(command "slice" "l" "" "zx" pttmp12 pttmp11)3 o, T; s V5 C& V
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
7 V/ ]& d. d0 U. ]; 创建最小直径的圆柱体，然后与螺旋作交集
& q( t; T: W' V7 ]- A (setq e (entlast))
7 U6 k! Z" `0 C" q, R- f b# j+ U (command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))0 K' O$ _, y- \: [( g
(command "union" "l" e "")6 \2 t4 Y; F& O% d/ {5 \3 a
(setq tstmp (entlast))
7 i/ X; V; {( R8 E6 _; 创建中空的圆柱体
- q5 u7 v$ q8 J) c3 j/ ~ (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia
' }5 x9 f! H* q% A (setq e (entlast)); f( V/ _* f( M! _& B( ?
; 若最后创建45度的圆锥' A! G2 U T% r) B' M& Y6 @
(if (/= endcone "order")
' B2 \& B2 Q! e/ ], j* }3 V (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart)))
& i. [5 p9 N8 R1 ^6 C (command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart)))
+ X9 N6 @) t! x) G6 f2 L (command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))
7 B0 p: f) Q- j6 `! ^' { (command "union" "l" e "") . d5 ~/ a, z6 @1 u5 X5 g
(setq e (entlast)): R6 h3 Q* R+ k+ r
)
# F4 @1 ^6 Q' K( h# E. A )' {% u0 u& q$ y3 l; `- E, w
; 从大圆柱中减去小直径圆柱
6 f9 S4 `5 n4 c: e% w0 K (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))); a& K4 l: S0 @
(command "subtract" "l" "" e "")
! z- d1 P& v0 [% d2 ]% \: ?8 l (setq e (entlast))
/ t6 F9 H; U! I7 ^; 从螺旋中减去圆柱
9 u+ n5 [' q7 y1 c% b (command "subtract" tstmp "" e "")3 n- x: g- q9 K5 [$ V2 F
; 如果螺旋长度为负然后镜像
" q3 t* B Q/ }* B: B" \ (setq e (entlast))
# O8 E- W) } ^8 o% j (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))2 [ j# I {6 y' n+ t, J
(command "zoom" "p")
( h T, I8 q2 ^8 C6 R: ~5 j& h! E; (command "undo" "end") ; 结束undo步骤' A7 a" ^/ g# I
)
$ e) N5 ]" v; U) u* z/ e;;;---------------------------------------------------------------------------------------------------------------------;7 J, l( u) M6 T, J* I( d/ {
(arxload "geom3d" nil)
; l S& ]% C3 [) k9 l1 r9 [(princ "\n3DThread 已加载。 ")1 ^, ]3 Q8 y) ~0 h. u
(princ) |
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发表于 2007-2-27 20:30:11
