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(defun errMsg (s)6 Y) ^$ e3 h6 u
(if (/= s "function cancelled") (princ (strcat "\nError: " s)))
) K2 q/ H) `6 u7 x/ d ; 当命令执行时出现错误
& N3 i+ m0 I' a, C (setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C2 u- I3 r4 `6 t; i" L# {$ R
(setvar "osmode" osmold)0 ]7 H: n) h2 U: z
(setq *error* olderr) ; 恢复旧的错误处理0 G( ], @2 a7 v: r6 [
(princ); ^' E8 R% e6 {& T; J5 n) v! }
)" I; j2 Y1 }. T2 `8 k9 ^, r* ^
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
6 N* Z( b k" h7 D8 e9 F ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)
2 j8 m- J( Q: t6 ^' i, V ;-------------------------------------------------------------------6 k; D2 s( P1 ~
; 获取公制外径大小、螺距总长4 m2 l' ~) |; @/ i+ T. t7 l% @$ O
; 然后计算一系列几何点
: h- u8 x9 b2 j. H7 I6 v z ; 并且关闭对象捕捉、命令回显
. d# S( [1 Z3 v) C8 s+ o! c ;-------------------------------------------------------------------
) ~$ k, }5 Y( K2 N$ T (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))
- Y6 ^2 V! v5 T0 [9 B1 A; H; i4 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)) 2 ~9 M: L; @# s h" y' W \
(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)) ! ?1 C/ q$ I0 `& y; w0 Q
(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))
5 Z# U5 p0 G8 V+ D6 B0 t ` (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)) 8 x- o+ e% J+ e& l' S9 s6 j
(setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
% T0 k, H" V e! K (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值; o1 J6 ?5 [8 B& P" o$ g
(setvar "osmode" 0) ; 关闭对象捕捉
7 A" _; d7 o0 V" A" o (setvar "cmdecho" 0) ; 关闭命令的回显" O1 p- k5 `6 v8 ?0 v( L
- M* g' Y! J3 ~8 B
(setq innerdiafactor 1.5) ; 设置内径系数0 I6 _2 K! a c; b6 W9 S t% n
(initget 7) ; radmid 必须非零、非空、非负
9 i3 L) t: n( o' ~) t (setq radmid (getdist "\n公制外径: "))
" H- X. D% l b$ d5 d/ n& W% b (initget 7) ; threadpitch 必须非零、非空、非负
% E' p6 x$ U$ }6 ^. W (setq threadpitch (getreal "\n螺距: "))
' ~4 B9 B: q E: Y (initget 1) ; ptStart 必须非空1 R5 U7 k3 V- w
(setq ptStart (getpoint "\n起始点: "))
9 A6 [- u) n$ g2 u( ` (initget 3) ; threadlength 必须非零、非空、非负
# H! w7 v5 p: b! c9 D* g0 `5 E; _ (setq threadlength (getdist "\n螺纹总长(Y方向): "))
5 ?% G/ Z- F" I' ]- Z; 对公制外径添加公差) A8 l- | z1 U# o
(if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置) }; k9 t% _, I! ^- k+ g
(if (<= radmid 6) (setq order 1)
& d2 A3 R4 |+ U/ w. ^ (if (<= radmid 10) (setq order 2)
9 R) n2 l7 h/ r1 N: k! d (if (<= radmid 18) (setq order 3)
; O# N! R/ a2 T (if (<= radmid 30) (setq order 4)
+ \: g4 S2 a, Z# @! ]( d; \ (if (<= radmid 50) (setq order 5)
! R* g5 U4 M& N* t' _$ Q (if (<= radmid 80) (setq order 6)
3 ]. G5 I, }2 s- s: s& K5 Y (if (<= radmid 120) (setq order 7)
0 |1 d: ^/ K" F- Y- J (if (<= radmid 180) (setq order 8)2 [# K* h! G9 ^( j: Q/ M; u9 ~
(if (<= radmid 250) (setq order 9)$ \8 E4 A4 d+ r' B
(if (<= radmid 315) (setq order 10)6 N9 f" Q9 |, @0 _7 w
(if (<= radmid 400) (setq order 11); [0 q( y& }# T0 v# A7 D3 t+ e9 b
(if (<= radmid 500) (setq order 12)7 E1 G; H. N5 z
)))))))))))))4 e: V" [% ]* P) Q) P/ v! K
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带
$ H# g0 w" g9 Q3 Y) W$ P3 c (if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))' g+ Q& o6 R4 U, q9 U s
(if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
0 @. b/ h/ L4 j2 B )))
3 m! k; O) @ S% \ 7 c: N0 l T2 Y+ c3 G2 C
(setq h (* 0.866025 threadpitch)) ; 计算齿高, G/ Z3 D0 F0 w, h! R# M
(setq radouter (+ radmid (/ h 4))) ; 计算外径* ^4 ?8 d) d7 D5 B. u/ i
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
! R# V$ |5 c7 q (setq threadangle (+ 30 0)) ; 计算齿顶角
! d1 `5 p3 ~- F& H (auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数. ~! |4 s: K5 M! w
(princ "\n三维螺纹创建完成")
9 s/ ?! ?2 J( L9 p (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
" n% n8 V; Y2 D7 g: [/ l8 M (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值
, v7 G5 V8 B/ [# W9 [ (princ)
/ U% \1 Z' c) q+ y* }- O: C)1 r% b& y4 s: |+ [0 g" l
(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
# `" c; \# D8 c; O2 R3 N$ Fpt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone) n; ~7 E( E2 F" _0 J' n5 f% M
;(command "undo" "begin") ; 开始undo步骤
6 X- S; }# z0 n8 }7 a (setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)
% k- x j4 e/ ?8 m" m+ `9 C pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
4 Q e! s v' w. P5 B pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
: U5 x$ T! J+ S- d( i( ^5 { pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)
3 @3 u/ |( w7 z9 R! f$ K& C6 k pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
3 Y' X- @9 g |( t ang (angle pttmp1 pttmp3)
2 `1 n1 Q" r8 k! C7 I7 h. ~ pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)+ H8 l6 ^& L' ^7 E5 q, u9 A6 U; @
pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
/ c: E5 G1 U7 Y& e pt3a (polar pt1a ang radouter)
1 R/ n" q( f( P% A pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
: c* a. q4 d e: k4 p6 D7 O5 k pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))6 }& S- k0 I1 ^0 `
pt3b (polar pt1b ang radouter)/ w8 Y4 ^" [( Z1 [7 q
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)8 q5 _, v# l: r) T( U9 L5 z
pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)
( L& L% u1 [+ Q% s* V$ T. z/ i pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))
- D5 g0 @% S# Z3 r+ i: W pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)5 ~1 {. w/ ]0 E0 p/ R; F
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)2 T$ h2 J) h# j: \- A
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
$ R* y) L! t4 ]+ b5 |) g3 V6 \ pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))" s1 e$ e/ @; v' J6 C# Q
pttmp11 (polar ptStart (/ pi 2.0) threadpitch)3 L$ ^& G; Y7 ~( ?
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
$ p& }& L6 j4 u' r, G; E7 {8 { )4 P1 t& M* |6 B: x
;-------------------------------------------------------------------/ L% Y7 H( [/ Q: I& q
; 绘制两个倒置的并偏移1/2螺距的圆锥- f0 \+ t u1 o5 x1 r! ]& o6 @; a
; 这两个圆锥都以中剖面剖分
/ D! h1 Q/ l8 o6 V ; 进行并集运算" F7 U5 |# n1 i5 k4 W" c
;-------------------------------------------------------------------
, |2 c5 j: A4 {( W/ ^2 E6 a(SETQ startcone "order")7 t# v2 o: L+ B, v% u4 z, A
(SETQ endcone "Y")
) W) V8 y" R, C0 r- p; d (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b). J) v* u: M' H9 b/ v9 r* ]
(princ "\n正在绘制三维螺纹，请等待")
) Y, m) w: |6 w6 R6 h# L (command "pline" pttmp1 pttmp5 pttmp6 "c")
; K8 Y; b0 `7 B9 `2 q( p (command "revolve" "l" "" pttmp5 pttmp6 "")
) W6 B* l- y, P5 A (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)0 g" E! F5 Q5 q( m% R
(command "slice" "l" "" pt1a pt3a pt1az pttmp3)" ?) p1 i n Z4 P
(setq tstmp (ssadd (entlast)))* d0 J; h; [- W! l
(command "pline" pttmp3 pttmp9 pttmp10 "c")
& z9 e/ Z# u: `9 h (command "revolve" "l" "" pttmp9 pttmp10 "")0 k/ d2 I+ B7 O T# X6 k, j
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9), Q6 e7 W4 H0 Q& r& o8 c4 O
(command "slice" "l" "" pt1b pt3b pt1bz pttmp3)' g: T! \( U6 ?- w+ T
(setq tstmp (ssadd (entlast) tstmp))
0 O" I8 y6 L1 F: l- H7 ^/ V (command "union" tstmp "")
8 Z8 f- p5 O$ T; y4 S+ P5 | ;-------------------------------------------------------------------
; K2 O0 J% D6 }$ W+ b7 \/ z ; 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) {- o( a% g+ R2 r
; 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 M- g7 L$ _+ s1 w" O9 R
; 在最后一步被切除
* l- K* t6 V, D0 U ;-------------------------------------------------------------------7 z8 H8 g/ W/ M' S1 ?# B' w+ n
(command "slice" tstmp "" "xy" ptStart "b")% O1 C/ r2 ?7 k+ p
(setq tstmp (ssadd (entlast) tstmp))
+ P6 S% m: u) y. `& T6 ^: G (command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
1 C* u& ]8 W& k* Q* x0 {7 G (command "union" tstmp "")- f7 _& y1 U, q `5 v
;-------------------------------------------------------------------/ _2 z7 ^ L6 P D# ^9 X' S
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）" K$ d# B5 s5 N4 q/ ^5 h
; 得到的实体再切除到指定的螺旋高度
+ w; `5 Q5 w0 z/ S ;-------------------------------------------------------------------
: @. q: e. p5 w+ x4 H2 |/ [ (setq e (entlast))9 B9 N# ~) n8 f; d1 A& _7 K
(command "array" tstmp "" "r" ttal 1 threadpitch)
! N# w; g: C+ V h* L (repeat (1- ttal)
2 f! G: J' [0 D/ y6 w( i (setq e (entnext e)4 s. ?+ `; ^: y$ m* L) P& l
tstmp (ssadd e tstmp)
* _* ?, K) n3 Q Q4 _ )
9 ~, D* `- p3 K )
$ J- _7 ]9 h/ a8 q (command "union" tstmp "")
* h* z$ |" R) C# K I3 n/ S1 `( I; 若开始创建45度的圆锥, g& S. P, j2 s! v# ]8 u) t; j: n
(if (/= startcone "order")
, s/ l) m4 U; S$ } `( e6 ]3 W (progn (setq e (entlast))
2 y5 N& h! J' n (command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))
! j9 T6 d. |8 k. z4 _ (command "union" "l" e "")' E: h; ^. {$ H- N( j% ~
)+ o, D$ I4 E0 w/ |/ E7 \9 |
)3 ]. J8 s B/ a* e
(command "slice" "l" "" "zx" pttmp11 pttmp12)
( {% v; B" |% z3 R1 y (command "slice" "l" "" "zx" pttmp12 pttmp11)* u( ~2 c" Z& K$ a* z
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
! d; R- a, ?3 C- p6 s M; 创建最小直径的圆柱体，然后与螺旋作交集8 q+ ~0 z" Q0 R4 |; B
(setq e (entlast)): h/ g& {& k- N7 O
(command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
' ~* v' y2 i3 J6 e+ \' F (command "union" "l" e ""). b* g9 R* h T1 n7 b7 m
(setq tstmp (entlast))* a7 g! ]) ~# O
; 创建中空的圆柱体8 a J, Z3 a0 F& k3 `
(command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia
: P8 I" B+ w1 U (setq e (entlast))
! G* z2 \' U5 c- w! m; 若最后创建45度的圆锥' o/ f1 x! }9 w: [9 \: o
(if (/= endcone "order")
+ K& }- e7 ?* f6 e, b (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart)))
g- y/ ~. ]& i% t1 e4 |* r (command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart))) : B: H7 t8 }/ f
(command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))' w- E# h) O) k" i% F& Z
(command "union" "l" e "") - _/ G6 B9 ^- y2 ]8 ^! U
(setq e (entlast))4 u6 }, ~, E4 D
)- Q8 X; @0 d7 S' G: I5 b, ^
)) t9 U6 {' D/ ], I! L7 ]& c
; 从大圆柱中减去小直径圆柱' F6 P0 f, r4 V* v8 S
(command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
/ y1 _$ J0 Y, P$ V( N" K" y3 E* l (command "subtract" "l" "" e "")
2 N# r1 E H6 L( T) _ (setq e (entlast))
: I5 _; {# C0 t, [9 F; 从螺旋中减去圆柱
+ Q; `' H- T6 [& q (command "subtract" tstmp "" e "")
- V. Q- b) W$ n; 如果螺旋长度为负然后镜像$ x3 t6 M- S/ Y2 N! _0 B" M# x
(setq e (entlast))5 U& V8 [; J( W1 b
(if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
1 E& e: a( ]8 V8 A (command "zoom" "p"); [8 R' E% p N
; (command "undo" "end") ; 结束undo步骤
' V S1 U7 C) q- _' s+ \4 C)
3 I6 I8 E" N; Q;;;---------------------------------------------------------------------------------------------------------------------;: X1 n1 N) e6 ~- S9 R
(arxload "geom3d" nil), N$ Y; k% P& D4 C1 K. c
(princ "\n3DThread 已加载。 ")
4 n* h W( p. {/ w7 T(princ) |
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发表于 2007-2-27 20:30:11
