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(defun errMsg (s)
+ R3 K# P8 O) s4 k& Z (if (/= s "function cancelled") (princ (strcat "\nError: " s)))
1 j; c0 q, }: w' Q( {3 _& w% m ; 当命令执行时出现错误; v) M1 S# g$ E7 L1 H* E
(setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
. ]/ _! i7 B2 y' t, o (setvar "osmode" osmold)# g& D- ^* w$ A0 v- y: p8 V/ D
(setq *error* olderr) ; 恢复旧的错误处理
4 v; |2 U8 W; K# j! J (princ)0 c9 {; L, d9 }4 v( n
)6 V( I" Q2 t6 l& y
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
" b) }7 C4 e/ P$ E4 m* L ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)2 E, k8 a) G. D" P [) G p
;-------------------------------------------------------------------4 e' [8 i3 g1 n2 m" X4 i+ p) d
; 获取公制外径大小、螺距总长1 t' l' R& A9 Y3 _
; 然后计算一系列几何点
. F) Z5 C( w/ B; v0 ^) t B1 [: y ; 并且关闭对象捕捉、命令回显
! T- T5 s& ^$ F ;-------------------------------------------------------------------
, X4 Y* \9 l8 J! E& ]8 o (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)) ; X" l* P; E7 f1 y8 Y
(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))
( s$ k# P3 O3 g8 B1 \& M# W0 ` (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))
5 o" b" F' F, F5 J; s (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))
# \6 @9 h3 N3 e. o4 B (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 I* |- N$ y$ X- ?7 u5 T
(setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值9 c2 p7 u/ u' r* e, s8 e6 J, X
(setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值
- Z/ x7 k1 z* I* t6 @' h (setvar "osmode" 0) ; 关闭对象捕捉 ) V& Y" p/ Z. D$ ]- I' o
(setvar "cmdecho" 0) ; 关闭命令的回显3 u$ b( P6 U* c, l( [7 p7 f
: T' K8 i% s: a1 `+ n# I- `$ W4 c
(setq innerdiafactor 1.5) ; 设置内径系数
/ b5 H7 K" {% S4 } (initget 7) ; radmid 必须非零、非空、非负3 r: s7 R/ v T. \9 }
(setq radmid (getdist "\n公制外径: "))
% x. R& i& L4 q3 t (initget 7) ; threadpitch 必须非零、非空、非负( ?) N4 `3 v U) i' i8 A
(setq threadpitch (getreal "\n螺距: "))
5 n1 j7 w( A, |$ y/ c7 t (initget 1) ; ptStart 必须非空
& X+ v7 _8 P+ t# B6 i1 S; g: e( Y( U (setq ptStart (getpoint "\n起始点: "))
5 j* a# d! P8 h: H (initget 3) ; threadlength 必须非零、非空、非负0 Y, w# Z2 i2 \3 w s0 n8 D
(setq threadlength (getdist "\n螺纹总长(Y方向): "))" W* j3 X2 ?+ V; S) R/ _( a0 {0 M
; 对公制外径添加公差& r3 y. A% j/ d ]0 y1 j
(if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置
8 W' ?7 s1 l' o$ {, @, l (if (<= radmid 6) (setq order 1)
8 A1 M. o6 F1 C/ M4 J* t1 y+ b (if (<= radmid 10) (setq order 2); d! p2 |4 Y0 I+ D5 t
(if (<= radmid 18) (setq order 3)# b* Z0 G$ G7 H- v) L1 l: X$ B
(if (<= radmid 30) (setq order 4)
1 m8 q3 q1 b& `- d: q (if (<= radmid 50) (setq order 5)! u2 `$ \0 i3 d! C3 N
(if (<= radmid 80) (setq order 6)
* I! e. V9 q& d, Q4 I& B (if (<= radmid 120) (setq order 7)7 P% Z3 @: I0 B' t, k
(if (<= radmid 180) (setq order 8)
3 L+ h& X/ u( O (if (<= radmid 250) (setq order 9)# Y5 a1 S* J# o# p" d" ?6 u
(if (<= radmid 315) (setq order 10)
& r1 T* c# D# U1 p0 W( Z (if (<= radmid 400) (setq order 11); A+ \% \1 ?2 }6 r {
(if (<= radmid 500) (setq order 12)* e/ U. W- j% \; r
)))))))))))))6 R* I, J# f- _# o; U& E
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带
. ]8 M& f& n; `4 g1 Y$ d( v' F (if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
8 ?8 M3 [8 b: p (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
. T/ k5 j4 C) e# r+ } ))); ~0 s, K$ h0 w. L- V& w3 ]
0 `5 B. \/ b1 U; j
(setq h (* 0.866025 threadpitch)) ; 计算齿高
j# g& C, r( t (setq radouter (+ radmid (/ h 4))) ; 计算外径- P( U0 x7 L, {* q
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径" A) o) g* M5 K y, N3 M
(setq threadangle (+ 30 0)) ; 计算齿顶角( z1 c. l" U, }# x$ P
(auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数8 B9 Y' P# U. C+ q3 k1 C
(princ "\n三维螺纹创建完成")
3 l S$ ]5 O, D, G' Z/ j, N" h) L W9 H (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值 B \. J) S9 w# }1 E- w$ Y
(setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值! G+ e4 ?0 N4 ^7 w. c; A) F
(princ)* ~7 r* k+ f8 [% Z: x
); Y1 z* q6 R' O: U8 T' o
(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a# e/ [3 o9 I4 N6 g" G, H; F- b5 B
pt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)9 W; U Y# t7 ]" ^/ Z; D- [& q Q
;(command "undo" "begin") ; 开始undo步骤2 w7 l8 K8 ^2 N- X, |( Y5 ?. i
(setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)
! S' G8 W0 X" P pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
* Q/ ` S7 y8 k pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))2 c5 m6 Q! f& f9 z" _6 c
pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)' e9 t8 ~( K | L5 K
pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
* S! b$ F+ |9 L% e6 d ang (angle pttmp1 pttmp3). o$ F# r s# a
pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)
0 A3 y1 l! u6 ]. O1 _ pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
7 J; ~* Y0 }; x( S* E$ y pt3a (polar pt1a ang radouter)5 j; i$ g, g) m @# l
pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
- H/ o3 f- G4 C7 g4 q* y+ H pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))4 D5 R6 Y2 U1 i
pt3b (polar pt1b ang radouter)+ ]3 S( T* [2 {& \) L- J
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)
' R5 b5 x& X9 I! v4 e; H/ P pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)3 W- k, c- q. B
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))
r1 D9 X1 P; K# R' I7 M6 { pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1): [+ `' Y3 H: @- B. ^# G2 C
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)
' x4 n# Y* I A' O2 j3 V pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)* @. Z) G+ L6 @7 u6 C
pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))' G, [6 u2 _, A: W2 k
pttmp11 (polar ptStart (/ pi 2.0) threadpitch)% t1 w n+ `# S
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
! [: p3 F1 J+ m! a8 U$ F )
+ L, o1 v# F' Z* J, W% Y ;-------------------------------------------------------------------
* {& P; A5 e: ^: ~ ; 绘制两个倒置的并偏移1/2螺距的圆锥
& Q! R, ?' [4 i R9 A ; 这两个圆锥都以中剖面剖分3 |6 Z# B7 k1 w) o, M, t
; 进行并集运算% ]3 a+ n* X3 f5 d- H" R
;-------------------------------------------------------------------
+ f- P; O' ?+ }& p) X7 i9 l(SETQ startcone "order")4 b; r6 c$ o3 J6 @! B0 ^2 D0 r
(SETQ endcone "Y")
6 ?! h. q0 G7 K0 s$ C. h# w (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)
9 w2 q; D! z( e' i( s4 L/ [% ~ (princ "\n正在绘制三维螺纹，请等待")
+ q& ^0 I) w2 ]: r u$ \ (command "pline" pttmp1 pttmp5 pttmp6 "c")
! F# }. {) U8 J (command "revolve" "l" "" pttmp5 pttmp6 "")
- I! ~' v0 o3 @0 D0 j+ z- C (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)
0 R$ z3 r1 B9 F& x (command "slice" "l" "" pt1a pt3a pt1az pttmp3)2 Y/ s7 [7 K" \' j2 I& S$ ?
(setq tstmp (ssadd (entlast)))' Q q0 r# ~& T0 O
(command "pline" pttmp3 pttmp9 pttmp10 "c")
3 L: ~! C. R" J$ T (command "revolve" "l" "" pttmp9 pttmp10 "")
; o2 o5 ]* s' m- | (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)
# x1 z7 R2 ~5 D (command "slice" "l" "" pt1b pt3b pt1bz pttmp3)& m* N: V, U/ d9 v
(setq tstmp (ssadd (entlast) tstmp))
# C# A5 P- B* }8 z (command "union" tstmp "")( e& Q5 v2 i0 i
;-------------------------------------------------------------------
1 v- i1 F6 O2 {9 h# |0 {/ d8 T ; 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1 r; e4 R# k$ a
; 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
5 R/ @" K7 q6 g/ _! _ ; 在最后一步被切除, }8 |$ f$ w$ u! ]3 T7 a
;-------------------------------------------------------------------. I3 H# _$ |7 m6 @
(command "slice" tstmp "" "xy" ptStart "b")" `' N- Z. L/ U# j# a4 i5 I
(setq tstmp (ssadd (entlast) tstmp))8 D2 }. Q3 _) e6 x, g9 K
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")( u# T! `3 j7 q+ X9 S7 B
(command "union" tstmp "")
6 B# t: ]. m4 Y$ }# a ;-------------------------------------------------------------------& P0 N8 `$ ^& j! D3 p
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）3 T$ N; m6 c. `3 Q& p2 H8 n
; 得到的实体再切除到指定的螺旋高度
) y& L. i/ J5 n% G- b ;-------------------------------------------------------------------
2 f: P$ `1 a) } (setq e (entlast))# u% ~. G& v" H! s* q# `0 [
(command "array" tstmp "" "r" ttal 1 threadpitch), o: q; o# s9 }, E2 w0 `
(repeat (1- ttal)
3 ]! T& |% f. |: F, e# }7 d (setq e (entnext e)
/ S4 A. i/ |! x* j( [5 j tstmp (ssadd e tstmp)
) V, ~# x1 T! v6 v# g )# z( b& A2 g2 E) x5 Z& C5 E+ s
)7 Y9 S( ?/ j3 x
(command "union" tstmp "")
4 A, E# t- ~8 [5 U8 u) s. w4 r; 若开始创建45度的圆锥
3 E. t g! Y+ U+ p (if (/= startcone "order")% q, U* D3 H; L
(progn (setq e (entlast))# S1 R& P& d+ l. v, j3 G' G
(command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))8 ?. B7 c& M P o) u$ S
(command "union" "l" e "")7 |# ?) t- ?# `* Q
)# q$ R Z9 I4 B( C# E u
)
2 w& K+ B3 U8 a/ ~4 { (command "slice" "l" "" "zx" pttmp11 pttmp12)$ g0 e. |* i' i+ X- r
(command "slice" "l" "" "zx" pttmp12 pttmp11)6 L2 I% N7 R6 g7 ], }+ Z7 I: K& i
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart))) * ]9 G7 L; Q: J7 X7 m/ Y) b9 g: w
; 创建最小直径的圆柱体，然后与螺旋作交集
$ ~1 z+ N( q( x6 ]0 y, v (setq e (entlast))5 n; c6 x( A& t8 i$ V9 ?! I
(command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
1 I7 [3 q$ j J2 I' H (command "union" "l" e "")
& M8 t+ R, t L& v+ d$ @ (setq tstmp (entlast))& o2 p3 d% Y' c3 l; Y
; 创建中空的圆柱体
1 a+ x$ H- w+ e5 w; X# U (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia) v) S& N( L; Z4 |8 t2 l
(setq e (entlast))# w7 A3 |( m: \' \/ X8 ?
; 若最后创建45度的圆锥
C2 f, o6 u$ ~- @ (if (/= endcone "order")
* \: \; g* p9 P (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) 6 h( E9 H# s% y
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart)))
2 U! H9 S- U/ q( [% w! w7 \ (command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart))) Q+ G( O# s* Q6 }- N
(command "union" "l" e "")
2 E* x! Y/ E$ G2 P (setq e (entlast))
, b- r$ A4 B3 Y4 c6 f4 U )5 [/ \2 j: ]$ | }
)
p, [, o5 ]* z$ ]; 从大圆柱中减去小直径圆柱
( N: o" Q* F u$ b4 v7 } (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))& g* z) P# H, z8 _: D; Y4 c
(command "subtract" "l" "" e "")" e5 ^9 w' X0 P- Y
(setq e (entlast))
3 [8 O/ x# f& f% v; 从螺旋中减去圆柱* o4 O( a4 ^+ m* Z s
(command "subtract" tstmp "" e "")
# {5 S2 G( m- ^+ ^6 I4 T ~* R; 如果螺旋长度为负然后镜像
8 ?1 ?/ b6 S4 v! _4 n (setq e (entlast))
% D! b- e, ]# d t5 w' ^4 J (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))1 g( r% I; A' R. x( j) d) ^. A
(command "zoom" "p")
* N2 y0 S. ^) w2 z# n) ~9 K; (command "undo" "end") ; 结束undo步骤% e9 q0 }9 @1 U: P
)
" x/ `- ^8 r) b) D; [' v;;;---------------------------------------------------------------------------------------------------------------------;
0 u& N' ~7 N7 ? T4 v" k(arxload "geom3d" nil)
! _# b! y! w. R- L# @ X(princ "\n3DThread 已加载。 "): E, \7 I' i6 k
(princ) |
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发表于 2007-2-27 20:30:11
