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(defun errMsg (s)* ]# r* u" u: U2 C0 q3 j5 ]
(if (/= s "function cancelled") (princ (strcat "\nError: " s)))
8 ^* P8 ?3 ]1 ~8 G' X, } ; 当命令执行时出现错误, G4 O: K% w8 w7 f" _0 ^2 Z- R
(setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C8 m: u! K* F2 C; X6 _8 u" C
(setvar "osmode" osmold); q" `7 }+ f% C3 a# I7 K; C9 u
(setq *error* olderr) ; 恢复旧的错误处理( q) F( P+ p @5 q- b+ Z
(princ)/ z$ r, I6 i" p; t* K. L1 H
)
( M: J/ D5 r9 m- \/ Y$ P(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
* h: V; o. E- i/ y% V3 b) M ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)
6 f2 U" S0 z: d& B3 q ;-------------------------------------------------------------------2 u4 W0 |6 u2 y$ Y3 d9 p
; 获取公制外径大小、螺距总长8 m7 {, m6 @: s2 W
; 然后计算一系列几何点/ J" W( u% c4 o8 k5 J
; 并且关闭对象捕捉、命令回显
% s0 Q% @3 k* B$ B1 g4 k% x( W- N ;-------------------------------------------------------------------7 f, y5 z' \4 F
(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))
: M% |3 @) l/ Y& a (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))
Y; i- l5 ]3 b& G (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)) - c$ m9 b6 [: ~: r0 A
(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)) 8 x. S# d- }# 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)) - ^# j- `. K& }" n$ G2 P- \# L( W
(setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
. M% J* z w/ ]0 R- v5 R (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值# ^+ L" `+ y: w2 S
(setvar "osmode" 0) ; 关闭对象捕捉
. C5 m$ M5 ^# m; R! b; Z, v6 v (setvar "cmdecho" 0) ; 关闭命令的回显
; J8 g. q9 P6 }, S8 N t1 m) Y
$ i0 D6 @2 V6 _# j5 i (setq innerdiafactor 1.5) ; 设置内径系数( U' }& O a9 t5 n! m
(initget 7) ; radmid 必须非零、非空、非负5 n8 F; v( w5 a) k2 @( I
(setq radmid (getdist "\n公制外径: "))
+ \; y5 ^% w2 _) y' C: K: z (initget 7) ; threadpitch 必须非零、非空、非负
. ^4 p9 y/ z+ P, H$ V2 j (setq threadpitch (getreal "\n螺距: "))
4 }! [$ A4 V" Z& j (initget 1) ; ptStart 必须非空
1 ]. {+ x' q! r: i" p: a/ h+ { (setq ptStart (getpoint "\n起始点: "))1 M. f1 x: W. }3 ]
(initget 3) ; threadlength 必须非零、非空、非负6 ]- w8 _8 t; q5 w4 F
(setq threadlength (getdist "\n螺纹总长(Y方向): "))4 J* \+ V' [5 F3 B4 g* { o, u. h. J
; 对公制外径添加公差
! x8 s/ [/ K" J) G! g; Z (if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置
* @1 k* N: o" o8 Y (if (<= radmid 6) (setq order 1)7 s! u1 V2 a( B5 y% t
(if (<= radmid 10) (setq order 2)
# ?4 ~7 d6 g V% p# f- B (if (<= radmid 18) (setq order 3)& W M9 h! L+ }9 y
(if (<= radmid 30) (setq order 4)
" N1 U: T! }8 W3 l- g (if (<= radmid 50) (setq order 5)# B! X. ?) O h Y k- [
(if (<= radmid 80) (setq order 6)
/ K" F; \& V; B Q, A (if (<= radmid 120) (setq order 7): m# W8 f' k% x! ]3 l8 }$ G. Y' K
(if (<= radmid 180) (setq order 8)9 n( m; G1 `$ X6 J8 l
(if (<= radmid 250) (setq order 9)1 p; a1 d! c M1 w! U f U1 D
(if (<= radmid 315) (setq order 10)
, n* {( ^5 h' b z (if (<= radmid 400) (setq order 11)- Q, M: T8 g* |# M6 H Q/ q5 v$ z1 K
(if (<= radmid 500) (setq order 12)
( v* M* r% a" I& [4 ^% V' a4 M )))))))))))))
! ^( y! J) G2 U( w& T (if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带
+ j5 s% D) O! F. R: G (if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
9 `. W9 e) j Y8 a# h (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
2 }" j" _9 C! e4 U )))7 e6 L" Y7 \0 f( ^
- ]" u: p# d) `/ h
(setq h (* 0.866025 threadpitch)) ; 计算齿高* y& v' r3 |" ~; U# m
(setq radouter (+ radmid (/ h 4))) ; 计算外径3 @% H# [( P2 V$ O
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径3 X1 e8 |' u. x6 n P7 r0 }
(setq threadangle (+ 30 0)) ; 计算齿顶角
, @/ N" D2 i+ ] (auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数
; E6 F: C! G6 m0 ?# ^( G (princ "\n三维螺纹创建完成")0 x0 o8 z/ L q. V9 E* n/ B3 k+ n
(setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值" I( s1 @. r! \( x# e7 O
(setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值
3 p9 k, v. p: K4 ]% H0 U* I I (princ)
0 I+ f' y/ _8 V k& W, K4 S3 w)
, v" D2 g, N- x# J(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
( A9 S$ @& r" i) Z: F, [5 ~pt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)6 o) Z c. n, F2 n0 F( _
;(command "undo" "begin") ; 开始undo步骤+ U7 N$ s, \4 ], x
(setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3), I! D5 z- v h; H! c0 _! H: w. p }2 B
pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
7 F+ s8 `0 m/ _. g+ N$ K* Q pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
5 k) `; g- c' H8 C" l pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)5 b6 K5 {. a+ e/ z% `; \- K
pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))2 }5 E2 |% Y: S+ N/ o5 T9 l1 p1 t
ang (angle pttmp1 pttmp3)
8 V, o m) i, c5 W0 [ pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)9 x' @" Y) M, F ?1 Q* r6 d, l
pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
: }0 N$ y# I9 d* Y8 e: P$ i pt3a (polar pt1a ang radouter)
: k& C5 q/ ` R6 N2 r pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)$ i0 G3 r- }- A0 l6 w
pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))
9 F( m' |$ r9 P+ ? pt3b (polar pt1b ang radouter)/ z# l" d8 c# [) H4 j: ?
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1): W5 e! D8 r! G0 t4 A1 g$ L
pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil). H# S; z/ v5 o5 C3 L' _
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))
# G0 d% F i; x" [2 N0 M pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)
1 g8 ~! I/ U$ j/ ] pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)6 V5 ^0 Y: t5 K7 L2 d. p5 w* M
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
6 x6 X2 t4 J: l" K pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))6 p0 @( Z4 a; e9 {$ E T
pttmp11 (polar ptStart (/ pi 2.0) threadpitch)/ K. l# U" L) m& A6 A1 [) Z
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))) z' j# w3 n. c
)
; p( l( v1 b1 [' u" [ ;-------------------------------------------------------------------
9 w ]" p' v- }4 M ; 绘制两个倒置的并偏移1/2螺距的圆锥5 D" j6 J# w6 P* g& x6 f
; 这两个圆锥都以中剖面剖分3 X9 J2 S/ L3 S3 O) P) y/ g% G
; 进行并集运算+ w# _0 d, G. o, p5 Z
;-------------------------------------------------------------------8 R" g' C" }% T v( r" Y( s) x
(SETQ startcone "order")
5 \1 \7 S, j# z' A) J) D8 H(SETQ endcone "Y")
; [+ D! Q" l7 d$ v6 O (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)/ l& @. b/ S( J) W
(princ "\n正在绘制三维螺纹，请等待")
2 F( ~/ S1 }0 U5 v7 e g w2 _ (command "pline" pttmp1 pttmp5 pttmp6 "c")
+ J( s. y0 a& ^' W V0 o) }2 T (command "revolve" "l" "" pttmp5 pttmp6 "")7 j3 ~$ t% v& I/ _4 Q$ N; k
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)
+ [& l( M% M4 C1 \1 R! l8 { (command "slice" "l" "" pt1a pt3a pt1az pttmp3)
* p$ ?1 }% B: \5 \. g) c- H' I (setq tstmp (ssadd (entlast)))! L7 |# [8 W6 e8 r4 Y6 K2 O
(command "pline" pttmp3 pttmp9 pttmp10 "c")1 D, o5 n& K/ G: B3 }
(command "revolve" "l" "" pttmp9 pttmp10 "")
# }+ U% j' A1 d8 {# F2 [ (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)
! ?8 v- d' d2 W1 G% ^+ P (command "slice" "l" "" pt1b pt3b pt1bz pttmp3)* _8 H t! ], [; t2 A
(setq tstmp (ssadd (entlast) tstmp))
2 V+ t- X& z' \# l8 t" i (command "union" tstmp "")& } p: H, z, z5 k
;-------------------------------------------------------------------
3 A8 { H( |. N4 g ; 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
0 a$ b! n. [* K8 V# O# W ; 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
# _1 G- p; f$ D6 C( V9 `0 M/ q ; 在最后一步被切除. s, u3 F' s5 c3 s+ R
;-------------------------------------------------------------------7 [% j1 W9 X7 \" l8 H
(command "slice" tstmp "" "xy" ptStart "b")
. f/ N3 X' q/ V2 P7 f (setq tstmp (ssadd (entlast) tstmp))
' a! ~6 L/ o% S6 q- D) k (command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
) l# ]: j6 _1 c4 A: I (command "union" tstmp "")
" j( z& K+ O4 X ;-------------------------------------------------------------------
& ?! a2 N$ `/ N @ ; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）* E0 L" y- c. S/ w- f6 B
; 得到的实体再切除到指定的螺旋高度
. L" g, h& K7 g" m8 A! s p1 m- ~ ;-------------------------------------------------------------------
& j- }) b2 w" x (setq e (entlast))
7 H* N! |0 |* f1 ~# ]" ] (command "array" tstmp "" "r" ttal 1 threadpitch)
* a# H P8 V7 U6 z (repeat (1- ttal)
0 {5 b/ b1 ]$ r/ t, L5 ^ (setq e (entnext e)
1 l- s( }" t. [8 f- j/ j# O( W tstmp (ssadd e tstmp)9 E8 d' M3 X% w
)0 K6 N, L. V* t0 `. w# Q
)+ ^1 v; } x& j7 F
(command "union" tstmp "")
! t' S. {! I3 W& t; 若开始创建45度的圆锥6 m* M7 y6 ?- j& t. M
(if (/= startcone "order")
" t0 v. N, l) a (progn (setq e (entlast))( T: r$ i6 @6 y% I4 Z$ U- F
(command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))- p+ F; F" A: b
(command "union" "l" e "")8 Z3 b6 Q* |5 Z. s$ }
)
2 N/ Q. f; \: g2 }1 C5 U/ i2 q0 | )7 m- t3 _7 P9 W$ h% K% b! D2 f
(command "slice" "l" "" "zx" pttmp11 pttmp12)
6 X) |0 v3 _5 o: a) l+ p: d (command "slice" "l" "" "zx" pttmp12 pttmp11)2 r" O" h! C2 G
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
R) y0 J- B) K: d; 创建最小直径的圆柱体，然后与螺旋作交集9 A6 I7 X) a, N( N
(setq e (entlast))% S' ^/ c/ [8 `3 W
(command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
9 F( |, W* G8 g8 x1 ` (command "union" "l" e "")3 ?" }, v6 R( Y' J. i. }' r8 p
(setq tstmp (entlast))
}# S5 U# q/ R, R" u( U; j; 创建中空的圆柱体
3 O3 q; O% x W) q; y( n (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia9 ~$ [" v+ q& [0 ~/ M+ {
(setq e (entlast))! u: b4 n( {- Y" p! B
; 若最后创建45度的圆锥
, \% O% X5 H7 B: x (if (/= endcone "order") Y4 [/ U3 J, D1 m
(progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) : A; y1 i2 |* @( v# y! [4 k
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart))) 2 D j& r2 `- ]( b9 e. w9 m- X
(command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart))): ^2 K8 X: g8 I, }7 G, r; ?
(command "union" "l" e "") / X* f4 w/ f2 g/ q/ `5 K. m
(setq e (entlast))2 _+ L0 f1 }1 ?# O
)4 }9 [/ m H0 @1 @0 r
): G2 o0 n( W# h; O" i6 }. A# r
; 从大圆柱中减去小直径圆柱
( H1 f( j- S" B (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
. G6 H4 B6 B) U" c (command "subtract" "l" "" e "")* e2 Q" ], E9 [1 J& \" [
(setq e (entlast))
' U- @' ~5 @# ?2 J4 X' q; 从螺旋中减去圆柱8 R! C+ I. D$ u) {$ h! Q! `
(command "subtract" tstmp "" e "")
. k$ c/ T( ?, U0 Z9 d$ s+ Q; 如果螺旋长度为负然后镜像
1 ]2 z0 w& ^# G9 b& ]3 b4 p H (setq e (entlast)): N" b9 A/ ~: A* S! }$ {" b
(if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
7 O, t) d; Y. C) Y (command "zoom" "p")/ ^8 i, n/ i! p' W% S- Y
; (command "undo" "end") ; 结束undo步骤9 C0 K' j- f% J$ c9 u
)
8 Q2 M+ t# D, l' h% O9 h* q$ w;;;---------------------------------------------------------------------------------------------------------------------;. `+ S: Y* T" x3 j- S
(arxload "geom3d" nil); A7 c4 u2 M$ o( A' k7 Z. b& |
(princ "\n3DThread 已加载。 ")4 d9 I4 V8 }5 d7 N) k5 N( C2 A$ X6 I
(princ) |
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发表于 2007-2-27 20:30:11
