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(defun errMsg (s)
" J% T: G- A) f# } (if (/= s "function cancelled") (princ (strcat "\nError: " s)))2 Q) t+ }" k# |& ]
; 当命令执行时出现错误
$ x, b: M: n# R! H (setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
8 ?3 T0 L/ Z# F( a& `! p8 Q, G (setvar "osmode" osmold)
" a o. r: m# P# E( I# A Z. ? (setq *error* olderr) ; 恢复旧的错误处理' N, X9 u' t M
(princ)
2 _) m/ B! L7 i8 P& z- Y)! Z# l% b1 p/ S6 ?6 ]6 A
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle ; o1 P7 t6 r+ O8 a
ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)# j$ m# c5 X1 c; [/ p. M: u! z
;-------------------------------------------------------------------
6 M9 R, B4 O4 q) g ; 获取公制外径大小、螺距总长
3 \$ G2 u# f/ m ; 然后计算一系列几何点7 X# y K$ s" \/ S* F8 e [
; 并且关闭对象捕捉、命令回显0 E& @) L0 q' r8 u: e9 ]
;-------------------------------------------------------------------
0 W8 ?) M: v9 ]0 X (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)) R! W9 H- [* Z% q; g6 ^
(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)) & ?! u, [. ~0 h- {# m/ V \* N: C
(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))
: k; K" i+ y' M/ C (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)) ; ^" }- ^+ T: q, l; j7 i
(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))
5 a D0 k. I- K! X: e$ C (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值- F4 `6 ]$ m3 `" `2 m" X! H
(setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值
7 l7 J) t. [ a! B( C$ H) ` (setvar "osmode" 0) ; 关闭对象捕捉
2 P) T# C! a' }0 L+ O1 `! M (setvar "cmdecho" 0) ; 关闭命令的回显
6 h& b# x* N) e; ~2 Z. d" c 8 \# A8 I: m; `( R1 g; [5 C
(setq innerdiafactor 1.5) ; 设置内径系数. B3 w5 k2 X9 v" s& P
(initget 7) ; radmid 必须非零、非空、非负
2 ^/ S1 f9 L9 |: D (setq radmid (getdist "\n公制外径: "))! {1 j$ o# V- \& M) t# w
(initget 7) ; threadpitch 必须非零、非空、非负0 u/ @+ n! N7 g
(setq threadpitch (getreal "\n螺距: "))
+ g z# u0 R# P, ~8 @- n (initget 1) ; ptStart 必须非空
6 N5 u2 V: W( K$ ] (setq ptStart (getpoint "\n起始点: "))
V( U$ S; q g/ _9 l; ]+ L1 F4 I (initget 3) ; threadlength 必须非零、非空、非负
* N+ c" {2 k: b- y# I# y6 s (setq threadlength (getdist "\n螺纹总长(Y方向): "))9 h6 A1 m+ m8 p8 n! ?# u
; 对公制外径添加公差
1 b+ h* b- {9 q! E; {7 i (if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置
; W/ I5 ~; @2 |8 ~; f7 m (if (<= radmid 6) (setq order 1)$ v5 q+ ~) Z% n/ Q+ `
(if (<= radmid 10) (setq order 2)3 `& M$ t/ E' m9 [
(if (<= radmid 18) (setq order 3)
" s$ {) T3 } o4 K9 @ (if (<= radmid 30) (setq order 4)
B, B+ ?1 p6 c) ?2 ^) M (if (<= radmid 50) (setq order 5)( t% r- b4 H" e, Y$ [
(if (<= radmid 80) (setq order 6)
7 ^8 o4 o" M$ N$ b1 l6 B- s7 R z (if (<= radmid 120) (setq order 7)! \+ |( m5 S3 }* Q
(if (<= radmid 180) (setq order 8)
' |0 a0 U1 H8 t; f2 {" Z/ O (if (<= radmid 250) (setq order 9)% a4 }8 P& Y. z3 F
(if (<= radmid 315) (setq order 10)
6 [) N2 F/ A8 |$ E; A (if (<= radmid 400) (setq order 11); z6 k, U5 Y' q/ F# C1 K. }. j
(if (<= radmid 500) (setq order 12)# t; Z0 }0 b! _3 l4 |
))))))))))))) ]5 w# C$ N7 q. ~* E8 ]; h4 A
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带
3 h% n0 q: c3 m" D* W+ n4 w6 ? (if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
4 c; x9 E) Y; k* x (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))' }/ ?% s R! H& e2 _
))), J6 @, C0 y9 Z! ~* g- r
" E0 I4 l. [% e7 |& R5 i+ Q
(setq h (* 0.866025 threadpitch)) ; 计算齿高
; j* I# f/ w$ I4 c" {, o* W (setq radouter (+ radmid (/ h 4))) ; 计算外径$ s: P* @$ ~$ S U% D- p
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
7 N* [+ y! Q; @. @% Y3 E (setq threadangle (+ 30 0)) ; 计算齿顶角, Z! L3 g0 t) M" P3 F
(auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数# ~& y3 K8 `5 k+ g' A2 l) |
(princ "\n三维螺纹创建完成")
- z7 i d$ c3 v7 N (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
2 ~, T; [- a% W7 B (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值
4 }( v+ Q: w* Y8 P. r0 T7 X (princ)
+ t; F u+ r! ^# n)
. S+ h# @( T |- K3 g7 b B(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
7 ~1 s, y: e3 Mpt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)
. |7 R8 u& d! H0 l ;(command "undo" "begin") ; 开始undo步骤
+ Q- J5 A* F. W0 P, A (setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)
* m0 m1 ?% O1 {$ U pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
/ W7 s- u4 g( b4 q7 y) n% S. X pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
9 N' X/ R* u8 I0 q" R# Z0 n pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)
! ^- T( J% O8 z, m x- q7 h pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))' x7 [; {. c; q" L
ang (angle pttmp1 pttmp3)( {- V; u" ]" o) s: N
pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)
: C( d+ y. f2 l0 O" [$ S pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
) Z% c! p' T$ |; D6 D pt3a (polar pt1a ang radouter)
' n* u5 f, I1 _9 p pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
' O/ y7 V: N8 w. T0 X' } pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))
. A* a1 K" U$ l; s" W3 K; B pt3b (polar pt1b ang radouter)$ g7 s7 r5 [+ b$ q% o& `( _
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)# }0 _& G& a; O! t* e
pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)
8 R& R% C7 c7 }' z- }8 O pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))
$ l; D8 w% i: X# x6 p pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)/ g; G. {: \* m9 H- {* O2 e5 L
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)) E. m9 ~ v/ c7 U$ r& \3 }
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
+ S# W+ W: X4 y! { pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))
( r: q' i- m8 s pttmp11 (polar ptStart (/ pi 2.0) threadpitch); n7 M9 f+ ^+ Y
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
! O8 w1 w6 }) W' C) }% V )
# H4 I! f0 A, M W- ] ;-------------------------------------------------------------------
7 I( F# c( V$ d2 b: c5 E/ j! O ; 绘制两个倒置的并偏移1/2螺距的圆锥
8 F+ ~" i: Q: q9 x+ P ; 这两个圆锥都以中剖面剖分3 z4 S6 l8 i! I
; 进行并集运算! w q8 f' q; {& V: d* m
;-------------------------------------------------------------------# W5 c: f( A9 u5 ^: c6 O" d
(SETQ startcone "order")% }- }2 H6 q' o4 G* E5 p
(SETQ endcone "Y") T" d5 P1 f8 ]. n
(command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)0 z7 u3 L2 A4 f! H# M8 u% K
(princ "\n正在绘制三维螺纹，请等待")
# D, {. V# [. e- x% a3 O1 m9 ?& q (command "pline" pttmp1 pttmp5 pttmp6 "c")
0 u5 i" N) I u7 i+ h# @ (command "revolve" "l" "" pttmp5 pttmp6 "")6 f! ?- H( ~3 Q3 A0 @( p5 Q q% W6 Z
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)
. }, e9 _$ {* R: D% |* J3 h X (command "slice" "l" "" pt1a pt3a pt1az pttmp3)( \. Z O1 X, d5 V
(setq tstmp (ssadd (entlast)))
* g* J( d( y7 F8 w# J (command "pline" pttmp3 pttmp9 pttmp10 "c"); F* {# A* q% Q& a
(command "revolve" "l" "" pttmp9 pttmp10 ""), z/ Y) [/ [6 s% V
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)
. \0 k2 F. U# n (command "slice" "l" "" pt1b pt3b pt1bz pttmp3)
/ }2 {. u% r9 c3 ]9 G) d# C) o (setq tstmp (ssadd (entlast) tstmp))8 u/ @9 S7 H; h
(command "union" tstmp "")
9 @" ^' l" V% G" {" R! } ;-------------------------------------------------------------------; d/ r" a. b% S4 u: f% n
; 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
E8 T7 t6 @& i$ Y+ }2 |: R" Q ; 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
3 n$ ~9 ]. y, h* g% | ; 在最后一步被切除
; l5 o- f7 I0 }# o) c ;-------------------------------------------------------------------
' D% f( A) C% z6 ]1 l1 M (command "slice" tstmp "" "xy" ptStart "b")
- f" l: ?! Z* L0 m$ i, D# ? (setq tstmp (ssadd (entlast) tstmp))! I1 r' |2 H& g! E! k5 I5 H
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")& H s8 u9 q! {+ p' e- R
(command "union" tstmp "")( q4 b2 B V% h* \
;-------------------------------------------------------------------1 i8 t' Y. N4 c: Q2 m
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）
0 o1 P' g- S6 I) k ; 得到的实体再切除到指定的螺旋高度
: I" d/ X. ]# i ;-------------------------------------------------------------------
* L6 [( i o: E (setq e (entlast))3 ]! D% z8 Y& M0 A$ A A; b; t
(command "array" tstmp "" "r" ttal 1 threadpitch)
* C! ^; I" G3 [/ D (repeat (1- ttal)! I. U- b0 l3 Y E1 w
(setq e (entnext e)
, V" [: u* m+ |( j- C& O/ Q. N tstmp (ssadd e tstmp)
* U' v$ x: k0 u: }& j )& A7 a, }; F% T1 ?- L$ v; }
)
h3 J. }3 w+ I- r (command "union" tstmp "")
! V0 M( ?+ k( ^; a0 g" W; 若开始创建45度的圆锥7 G, X* ?2 I0 T2 O7 h% r4 P" `, u
(if (/= startcone "order")
, x8 L) z! V7 C* i1 |% T (progn (setq e (entlast))
! E1 k1 {" N0 Y* f1 g' S: z (command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))
) _4 V! }% M; u (command "union" "l" e "")6 J+ J. [8 F( r) q* x
)
7 [" a. c4 k' Z$ w0 p% G, b )3 l8 Z7 }$ w4 e( V
(command "slice" "l" "" "zx" pttmp11 pttmp12)$ h( |: m" p) v( d* W
(command "slice" "l" "" "zx" pttmp12 pttmp11)
5 G g$ H, d {8 s& v# d (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
; m& `5 O0 y( k. G6 T4 H4 k5 J0 T; 创建最小直径的圆柱体，然后与螺旋作交集
( K0 u w+ B4 G, C1 l+ ^ (setq e (entlast))
( A/ E1 K: a4 Z' k0 k, }& g& w5 t (command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
* p9 I0 G$ e4 |# ~ ]/ p9 e (command "union" "l" e "")
2 M' P: _% h8 a0 i4 n (setq tstmp (entlast))
}4 E5 Q6 d. A, G: h# F; 创建中空的圆柱体3 o/ G4 B8 Y! S2 e; Z! {
(command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia1 z1 I$ E1 [/ V, f/ z
(setq e (entlast))
8 `* ? B! t9 Y+ u) H, A; 若最后创建45度的圆锥7 h% \$ x2 K) z& j- b+ ]
(if (/= endcone "order")
1 M3 |4 ?6 Z3 L (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) 5 k$ I6 H! ^/ [
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart)))
! ~+ Q, {3 d' c (command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))
8 p$ i0 T4 g" a' L% \ (command "union" "l" e "") , H! ~& M& R7 a( ~/ g
(setq e (entlast))
6 E8 r9 ^$ U1 p )( V4 a& }3 L# K+ \* d/ _) I, Y' E
) R' I5 t* Y& M; j
; 从大圆柱中减去小直径圆柱
d8 x/ N1 Y6 O- |, p! V (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))* y1 X( i, {( I- h2 A
(command "subtract" "l" "" e "")8 l0 u& S# D& `# [% A
(setq e (entlast))
# e6 K* W' D$ T; 从螺旋中减去圆柱
3 b4 e) Q- `8 b! R (command "subtract" tstmp "" e "")
% @% R1 J# \2 d$ w. y5 d; 如果螺旋长度为负然后镜像
6 T* M: C0 I2 R# H: U4 C6 l0 B- @ (setq e (entlast))2 G2 `) e3 r! d: W
(if (< threadlength 0) (mirror3d e "zx" ptStart "y")); R% u9 p& w! ^
(command "zoom" "p"); x7 y. _( o5 N' i2 U( t
; (command "undo" "end") ; 结束undo步骤$ j0 Z0 i8 q2 x U' G1 f( {
)
# ^: |' F% x: }1 ?( [" I;;;---------------------------------------------------------------------------------------------------------------------;
& z$ \. S8 M$ L) x4 @4 o @(arxload "geom3d" nil)
: V1 t* d5 J2 ~: r(princ "\n3DThread 已加载。 ")% K" d% q( O) R+ U7 o. A8 M
(princ) |
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发表于 2007-2-27 20:30:11
