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(defun errMsg (s) l; ^5 n& I+ D5 K% s: M8 {6 {
(if (/= s "function cancelled") (princ (strcat "\nError: " s)))! S {8 F6 |* [: n
; 当命令执行时出现错误9 s% e; [4 d* {! T
(setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
1 ?) f1 O) v# q1 z* d2 \8 q (setvar "osmode" osmold)1 \" k5 g* U& M! r) H! Y/ l9 K
(setq *error* olderr) ; 恢复旧的错误处理# R0 L9 o! o0 E) {) J
(princ)* l( u( K& l# C6 f* f, S
)5 t4 ]; v: U0 J7 B% X
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
9 V) {- ~6 b* T% X$ o ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)( @8 @5 s8 x1 c" s$ g+ }
;-------------------------------------------------------------------) o- K$ M( e" d4 z% H' X
; 获取公制外径大小、螺距总长
0 m* F, o1 g: E$ i4 } i6 n ; 然后计算一系列几何点2 Z5 c: H2 G! W% |+ t
; 并且关闭对象捕捉、命令回显# Z! P9 s. W# r& k7 w4 B
;-------------------------------------------------------------------
+ B' n2 Z. q8 d/ a8 {6 H' q. r (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)) 5 D/ L) @& C3 {+ M$ B# H
(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))
4 @4 i' {; O( f3 R& b (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 o& n) J( T& K$ T! [' Q8 w) [2 f/ 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))
( A* q2 ]4 O1 k1 {3 `2 Q (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)) ! v% C6 l" Y' c( F- n( i( z
(setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
9 j& Y. v+ ?, G( s (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值/ X' u( f3 |, [0 j, V
(setvar "osmode" 0) ; 关闭对象捕捉 ; Z5 k( ~4 {! t; ~2 q4 Z5 y
(setvar "cmdecho" 0) ; 关闭命令的回显
: f* t, ~& _& O/ b6 v2 M( f
% N0 U5 X, ?# A6 G) c; s (setq innerdiafactor 1.5) ; 设置内径系数
" F; C# F5 F6 U9 O* j1 M. B (initget 7) ; radmid 必须非零、非空、非负
# y+ p$ d; c/ p2 H( f; [6 ]% h (setq radmid (getdist "\n公制外径: "))
' { A2 R( ?- k5 g (initget 7) ; threadpitch 必须非零、非空、非负
/ r9 I/ P7 A3 V% D: E+ v (setq threadpitch (getreal "\n螺距: "))& q6 z8 X6 |7 o, j
(initget 1) ; ptStart 必须非空
: `2 m# q( Z" r9 p6 I6 a' a (setq ptStart (getpoint "\n起始点: "))
! A9 b R7 U0 d5 |; U4 Z% H (initget 3) ; threadlength 必须非零、非空、非负2 n* e8 y7 B6 N2 \* r9 ^7 a
(setq threadlength (getdist "\n螺纹总长(Y方向): "))
6 ~8 @1 Z+ f/ X5 { y! d; w0 s; 对公制外径添加公差" e/ @: Z: i2 O
(if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置; g, O, e8 u# j; ~8 a; }
(if (<= radmid 6) (setq order 1)% }! g4 e# |9 g- y; m
(if (<= radmid 10) (setq order 2), Z/ x+ j& t8 e: O
(if (<= radmid 18) (setq order 3)/ `& v3 G5 ?$ g6 n8 g5 [# I- i
(if (<= radmid 30) (setq order 4)
, d. |% F- o; T4 Y6 F/ _2 `: r3 J (if (<= radmid 50) (setq order 5)
2 {3 Z# E: `) ` a" W (if (<= radmid 80) (setq order 6) V6 A9 M; M- N6 w" G% i8 U+ i
(if (<= radmid 120) (setq order 7)" `( x' }5 y6 |$ L0 r* u7 V5 O
(if (<= radmid 180) (setq order 8)
9 {: o0 ^+ k# i8 z( \" l7 \ (if (<= radmid 250) (setq order 9)
1 i$ t# _8 r4 s$ \9 @! { (if (<= radmid 315) (setq order 10)
+ o% V; q# l; `4 V, z1 r( F (if (<= radmid 400) (setq order 11)
1 Q, C+ f% k; R& [% {6 i (if (<= radmid 500) (setq order 12)& R' n0 y; l' [* z0 W7 W
)))))))))))))# f8 m q* q# O; K- A
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带& P( `7 g% \+ j
(if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))0 a. b. O$ F! n3 T: p% Z
(if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
3 T7 M0 T9 o X1 _ )))
( G7 j8 E; d% P# f+ U
6 H6 ?& f% {2 ? U* _* u (setq h (* 0.866025 threadpitch)) ; 计算齿高$ E; A' w$ O4 P/ l/ |$ X9 o
(setq radouter (+ radmid (/ h 4))) ; 计算外径
( P8 L# h5 m; u0 f, C" C (setq radinner (- radouter (* h innerdiafactor))) ; 计算内径) U9 k; `& B) e- \$ o5 R- O
(setq threadangle (+ 30 0)) ; 计算齿顶角
$ P, ~, W( g6 y (auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数0 f- X- Q E2 e! @5 u6 t
(princ "\n三维螺纹创建完成")
2 X8 s9 b" g$ w. i$ d3 U. m (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
2 d0 y4 V! H8 o S. m i (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值: n# s0 b: H/ _
(princ)
7 J5 X0 Y* i% _. a# g" {7 ]7 q) T7 n)
; T! K0 v6 }8 q$ E(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
7 R. C. ?" g& ppt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)+ C- A) |" S& Z! b7 `( m
;(command "undo" "begin") ; 开始undo步骤
9 C2 p2 j% j: U, ~9 ]6 ]- ] (setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)
* x. q1 r8 D- i+ p b G8 H pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))7 T' L5 L# ^ ~; C6 E3 y; a
pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
# @5 O, S) Z. v pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)" D7 j. g9 q" d$ V! e5 E* ^
pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
2 l- F1 L4 G; g; q4 W0 C ang (angle pttmp1 pttmp3). f4 J4 D/ A# i9 Z% H4 O) S: Z2 E
pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)! A' T! \( u* P: I
pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))( ^: C( G* w! Q5 c% R3 p" k
pt3a (polar pt1a ang radouter)# `7 K }& M& [; t
pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)$ ^7 E2 L' [, D
pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))+ E( `7 p k! i7 X
pt3b (polar pt1b ang radouter)5 ~+ m7 ?# ~* K) Y" t5 a/ y
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)8 n# @; m* ^+ m. A" x4 f- n! w" [
pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)% H6 c: T" D: h* Z, L, |
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))8 `0 v, o. w" x. X* x5 M; A
pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)
9 g8 J" p: l2 t5 Z1 ~$ |5 [, L pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)
/ ~* }* z' G/ q/ V* x$ I pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)) C6 R5 q3 Y2 d3 q. O* R+ H
pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))
. \+ E2 u: e5 }* |2 s4 U+ [% k pttmp11 (polar ptStart (/ pi 2.0) threadpitch). K- |! s: ^. D; X
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
6 o) d0 Q `0 E- k# j) P( w* B! k8 t )5 z) z* f/ K# l4 ^. a8 k: K
;-------------------------------------------------------------------# H* t5 o# k$ ]0 m' b
; 绘制两个倒置的并偏移1/2螺距的圆锥' ~9 S, p3 t! p6 g3 F7 b
; 这两个圆锥都以中剖面剖分; i2 U" h% E# G0 x5 Q
; 进行并集运算
; z, L; h2 O& m1 `" K ;-------------------------------------------------------------------) @7 M, f: q4 K$ j r$ B
(SETQ startcone "order")3 S9 G# K& ?, b" U' |' r1 [
(SETQ endcone "Y")
) T o2 Z$ c- `4 I: g (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)7 t, @6 }$ B4 m) k
(princ "\n正在绘制三维螺纹，请等待")
" Z6 S/ E! K9 K( c (command "pline" pttmp1 pttmp5 pttmp6 "c")
5 v5 `% g- u/ i% e( b. U/ _* J (command "revolve" "l" "" pttmp5 pttmp6 "")
& n: v1 W: b3 d8 q; A# { (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)
4 v2 q7 S+ }- M. G (command "slice" "l" "" pt1a pt3a pt1az pttmp3)
7 D1 r4 e) I" n& |- D (setq tstmp (ssadd (entlast)))6 a4 l4 y/ V6 r! z0 }; H: C7 E
(command "pline" pttmp3 pttmp9 pttmp10 "c")
% L) I8 l/ m9 F7 Y: A (command "revolve" "l" "" pttmp9 pttmp10 ""). v9 X) P; Z" a4 w9 T/ z, E; l
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)
6 R" P$ ]5 T$ | (command "slice" "l" "" pt1b pt3b pt1bz pttmp3)
0 [* I0 o$ a" I7 Q+ Y7 d (setq tstmp (ssadd (entlast) tstmp))
/ I6 q/ X3 W9 Y' [' E (command "union" tstmp ""); y6 U4 I; `; _- i4 d
;-------------------------------------------------------------------1 i' l- Y( j. t5 {* g; E! E
; 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$ C# U6 J: G% y/ s( p7 V 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 t: b- s: N# d+ S8 ~) {: ]- ] @( b
; 在最后一步被切除
" U) d- {4 I6 }3 y% }9 x Q$ u3 y ;-------------------------------------------------------------------# z9 o' ^0 X* o0 @1 H
(command "slice" tstmp "" "xy" ptStart "b")
& d- M( {1 R" `) F% p9 d/ U (setq tstmp (ssadd (entlast) tstmp))
3 \9 K' a) [: D2 z1 ^0 B, d (command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
8 Z ` e! x% m( g( E2 c, H (command "union" tstmp "")8 @; a! m' A) i2 H/ |
;-------------------------------------------------------------------
* L6 L4 C9 Q9 [, F9 A& H ; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）8 I8 Q& R9 S: I, i1 D6 w
; 得到的实体再切除到指定的螺旋高度# e$ M1 ^/ u. M/ j" Q
;-------------------------------------------------------------------
) j+ K2 u% h9 E" m (setq e (entlast))
8 e/ D& F+ h+ B1 k, }7 P (command "array" tstmp "" "r" ttal 1 threadpitch)
' | P$ M$ Q/ Y4 P (repeat (1- ttal)
7 N7 ]8 O+ [ ^1 V9 C" |8 i (setq e (entnext e)
0 X4 i$ {* f2 Q" |; w tstmp (ssadd e tstmp)
5 i7 E- A. J! z4 V" x$ t. } )
, Z% l+ T2 p% V: b) A/ R )
* H$ s6 B; G3 Y3 k) q (command "union" tstmp "")
9 ]7 I+ u5 J' g9 M* o& r* P% R; 若开始创建45度的圆锥
4 C2 C) V3 s5 c7 C (if (/= startcone "order")
* E3 X. B! V& v: E! q( H+ c (progn (setq e (entlast))- g+ s, Z; B* N
(command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))
* V) F% F) ~3 D' U, @: a/ t0 S (command "union" "l" e "")
" d3 e: J( ~! F/ D% V2 ?) Z' g )
/ c, V5 z1 k/ F3 m! j: l: d )- u! ^ [' ^8 V: O, B5 M. I/ m
(command "slice" "l" "" "zx" pttmp11 pttmp12)
+ S- x3 _% ~5 v! A: Z: W$ r$ k# i' _ (command "slice" "l" "" "zx" pttmp12 pttmp11)
9 |. z$ V1 M0 u: h (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart))) 2 S; O7 @0 S1 n4 c6 M
; 创建最小直径的圆柱体，然后与螺旋作交集
" D0 p$ _6 H# u+ h9 { (setq e (entlast))4 m$ U% k3 y) J4 l' F
(command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
2 @2 `3 f4 A' C2 F4 W5 { (command "union" "l" e "")+ P; z: K* F, L2 }, h X
(setq tstmp (entlast))1 x6 K* i# p7 k9 \ r6 J. b- G5 M) R
; 创建中空的圆柱体
& ]1 A% N1 q `; p (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia
- g, M2 x# `' ?6 l- P (setq e (entlast))
( C' p; F# Y- _1 u6 ~5 ?! _5 T I7 I; 若最后创建45度的圆锥
1 k7 f5 b- }* L- [9 p (if (/= endcone "order") a& c( `& A+ [7 v
(progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart)))
$ e9 W4 H) ^0 f/ T6 ^4 g( E& r (command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart)))
' F, C% K- ?8 g' o# C (command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))
# v9 X( C# u! W (command "union" "l" e "")
; W( Z0 u$ b! S: c6 {1 ^; I/ ?3 h (setq e (entlast))
( F3 S2 t" p7 i: ^' d; j3 v )
2 G# j5 S1 [/ |7 ~, _8 S )
1 J& b5 ?1 H& d% R2 `; 从大圆柱中减去小直径圆柱
7 n9 K: c2 e d (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))% _8 d" i* z0 |* D
(command "subtract" "l" "" e "")1 @6 s _- J8 r' J# ^
(setq e (entlast))
3 H6 d8 J1 h1 a( i" p; 从螺旋中减去圆柱
) c9 L; v% Q* U. V1 t (command "subtract" tstmp "" e "")1 C! X* c$ X* ?, O5 Y
; 如果螺旋长度为负然后镜像
" A8 T& i+ J" N4 J [1 |, a (setq e (entlast))
; O3 u5 D9 y5 F$ v$ l# q( w2 |% [ (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
* A C6 W1 F% v- H. m (command "zoom" "p")8 y8 Q$ Z% _1 a/ T M8 `1 z
; (command "undo" "end") ; 结束undo步骤. {( z9 E- F H4 L
): v2 t8 |" j5 c; F$ I
;;;---------------------------------------------------------------------------------------------------------------------;$ {4 C" n7 O \* k# q
(arxload "geom3d" nil): f! q5 B: \6 v9 m3 O
(princ "\n3DThread 已加载。 ")9 o2 F3 f" E* ]4 |2 `9 t2 d0 T
(princ) |
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发表于 2007-2-27 20:30:11
