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(defun errMsg (s)
* b( r& q! b2 g: p* \: R/ r) I (if (/= s "function cancelled") (princ (strcat "\nError: " s)))* E: T1 g" s1 m' [
; 当命令执行时出现错误
. R( R8 v( z& d. a3 d) l! J q7 r (setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C5 c) [4 ]' v. E1 y2 u
(setvar "osmode" osmold)
" ?4 `' v6 ~5 F0 x* m' t (setq *error* olderr) ; 恢复旧的错误处理
, M1 L4 Y- s- u (princ)5 b$ y3 y- d! ]! f/ w
)
_. |6 v" j- A* F(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
" o( x! Y* ~1 j g) h ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)9 V+ I4 ?: m7 K2 j1 g' c
;-------------------------------------------------------------------5 M6 L3 U: n* b( p* v
; 获取公制外径大小、螺距总长
% B4 F+ H) F7 R, A4 k ; 然后计算一系列几何点9 k- s/ |+ U0 O' I
; 并且关闭对象捕捉、命令回显9 y) _4 f6 ^1 R0 t6 o/ g
;-------------------------------------------------------------------
+ P' Y7 X+ P1 E6 h& N0 e. U* S( ^ (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))
2 W- ?# N a* |6 c% \5 U (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)) 6 c- V6 c0 G" N! \. u6 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))
) r1 y9 M" N: B (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)) 4 T0 {6 [$ K. H2 ]9 h/ n
(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 i" F# {+ {: D3 G* q (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
% A% j: `0 O/ p' r+ w/ j$ ?1 q (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值) F# ?) t" Y6 g, J6 o( k$ \. ^8 \
(setvar "osmode" 0) ; 关闭对象捕捉
0 b+ {8 B# B/ `' ~5 J4 z (setvar "cmdecho" 0) ; 关闭命令的回显! d0 t/ L7 M& x8 r/ ]
: Q! B4 K: ~8 w; e% K
(setq innerdiafactor 1.5) ; 设置内径系数
5 Q( c" d, @( m8 V3 T& ]( o- V (initget 7) ; radmid 必须非零、非空、非负
" j$ N& y4 n3 p& R (setq radmid (getdist "\n公制外径: "))% V7 b6 s/ E7 g& N5 J( y+ D4 h
(initget 7) ; threadpitch 必须非零、非空、非负
7 l' y8 L5 K3 N3 P5 _+ [ (setq threadpitch (getreal "\n螺距: "))$ I! Q. E3 Q1 g2 N
(initget 1) ; ptStart 必须非空
& O/ `$ m! _, k$ f7 Y (setq ptStart (getpoint "\n起始点: "))
; h; m4 H) ~0 g' y+ E0 X T (initget 3) ; threadlength 必须非零、非空、非负$ L. o& B( E7 Q
(setq threadlength (getdist "\n螺纹总长(Y方向): "))% G& P% R. C4 M9 C' j0 _& z# Y
; 对公制外径添加公差
6 x; B! J( Z' x* ] (if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置
: {6 b2 t/ b5 s$ M1 p# q (if (<= radmid 6) (setq order 1) l: W' r8 X8 R) k0 X
(if (<= radmid 10) (setq order 2), y" P, k- O- {7 i" D. O) d* q
(if (<= radmid 18) (setq order 3)
' m" ]% u' F i6 C* C& x* v (if (<= radmid 30) (setq order 4)
6 O# T, Z3 P* B+ @) u (if (<= radmid 50) (setq order 5)2 G. z. }- h G7 J7 ~+ y
(if (<= radmid 80) (setq order 6)
' x3 X# k- P/ s3 k# G# V (if (<= radmid 120) (setq order 7)
6 [, O+ q# F+ ]3 t (if (<= radmid 180) (setq order 8)' Z5 I9 s# W" U
(if (<= radmid 250) (setq order 9)
0 X z; k; W- G$ |! o* ]) W (if (<= radmid 315) (setq order 10)
7 |: Y# k# a% t! v6 y9 N5 ]& P; j (if (<= radmid 400) (setq order 11)+ x* e! I- P* l( M# ?
(if (<= radmid 500) (setq order 12)9 Y. `% q' g" K V9 N
)))))))))))))- R4 R3 O2 l' \7 i* I4 ?/ d
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带# y- H: d, \$ n( @( c3 y# F ~
(if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))5 ]- j* P3 q' m# i' I2 X5 f
(if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
" Q; n$ l3 t2 R# t1 O )))
# H, T: F" |5 |+ S & x8 n2 W" ^9 b0 @7 z. h" x+ A' g
(setq h (* 0.866025 threadpitch)) ; 计算齿高) m* B# t6 \. O
(setq radouter (+ radmid (/ h 4))) ; 计算外径7 ]7 c- S4 m- z& p
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
* C4 V/ [+ E" v8 m (setq threadangle (+ 30 0)) ; 计算齿顶角
. r1 | b& T6 q( K (auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数
9 ^2 F8 c& b- F4 S7 S# i' Y (princ "\n三维螺纹创建完成")( C r" N; W& n, z7 M
(setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
# z8 H/ i) N/ N/ [: `8 U8 ~ (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值, P/ r- g$ a% t. U2 O0 ?& F
(princ)
. @& P$ c* ?) Z7 c)
3 V3 ?: w7 b+ D, B(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
- k) ]! F/ T w8 ept1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone) I$ L6 M( }( u5 A4 z5 D" s
;(command "undo" "begin") ; 开始undo步骤
- W: I1 k" F5 O, ?3 @, R) F- @! G (setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)
- v/ ]% f/ X4 T pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
% r3 [: X2 }" Y, i8 I4 S0 ~ pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
" y% y8 m* E0 K9 y. r8 Q pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)
$ B% J1 c* Z. w( T9 S pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
. a! I" N. e' n- M6 E ang (angle pttmp1 pttmp3)! Q- R7 s/ A" m
pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)
+ H, R: o( U# M& ]/ G) n pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
8 ^5 a P" o. Q( F0 ?9 Z pt3a (polar pt1a ang radouter)
& s$ X3 Y/ u# m pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)# [# @) i4 ~9 d
pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))
0 _' i2 h" |# s7 ]) g5 i! ~ pt3b (polar pt1b ang radouter)7 l4 n' @; z5 `0 e0 Q
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)
$ D8 y* e* e. h; f% | pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)
, c4 U& a7 _& T) u1 n pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))
) t9 S7 ~ _7 Y9 K- ]2 t+ E( J pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)
3 Z) ?7 c8 J. }1 o+ @/ M3 e pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1), v$ [. y* y* Q! }0 W* I
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
G ]- @) c$ ]/ ~1 b# P0 K! @/ |" o pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))5 e3 Q2 a) M( Q, ^
pttmp11 (polar ptStart (/ pi 2.0) threadpitch)' q' P% x9 P; p ]* q8 N" }' s
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
- l* D S+ v5 M2 I )
4 `$ o" f& M5 @! G, J+ a I6 o ;-------------------------------------------------------------------2 U; s; q7 C% i3 n
; 绘制两个倒置的并偏移1/2螺距的圆锥
" l: ^; l3 A! z+ g ; 这两个圆锥都以中剖面剖分
3 t& ?5 @: E3 [0 `, A* f& w ; 进行并集运算
/ n5 }' \2 _ h ;-------------------------------------------------------------------; J! x; C1 j- c& v
(SETQ startcone "order")
5 w. F I; `) i$ z% m+ y" g(SETQ endcone "Y")
) r7 a r' T; L/ y (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)
( O# Y4 V5 T6 u; v3 c! H' V1 t, ]0 j (princ "\n正在绘制三维螺纹，请等待"); I) a& l" M9 C* \2 C
(command "pline" pttmp1 pttmp5 pttmp6 "c")
C6 T( H$ d0 i' D4 Y+ R# _ (command "revolve" "l" "" pttmp5 pttmp6 "")
" A0 q5 k* B# C3 C2 h. r& w (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)2 N* f w# c8 q0 _
(command "slice" "l" "" pt1a pt3a pt1az pttmp3)# H R" ^7 H% F% m. d
(setq tstmp (ssadd (entlast)))6 B6 F' U; E6 T5 }5 A
(command "pline" pttmp3 pttmp9 pttmp10 "c")- U7 G6 \0 z/ ~- |
(command "revolve" "l" "" pttmp9 pttmp10 "")1 u* R9 `; W6 }6 p( K
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)9 M; _: F9 K5 N: C9 j* I1 B
(command "slice" "l" "" pt1b pt3b pt1bz pttmp3)% q p% [7 o; s& }; L2 ?$ g% I( z
(setq tstmp (ssadd (entlast) tstmp))* C$ h7 Y, V# S1 z2 o" u% z# H
(command "union" tstmp "")8 A Z0 ?$ {) Q; ?
;-------------------------------------------------------------------* U) k: W1 s* _$ b) x" l8 X* ^
; 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( L$ c5 O9 I0 l- t9 `$ ?
; 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! o. G- i. E( ?3 ]
; 在最后一步被切除
, v( }% q( `7 c4 v, i ;-------------------------------------------------------------------+ k! g1 _2 H. q3 G1 V
(command "slice" tstmp "" "xy" ptStart "b")" E6 U" i$ R+ y+ \" _) |, _
(setq tstmp (ssadd (entlast) tstmp))! ]3 S2 {/ m: P5 M* A/ d) G( J
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")0 U) b( h7 v& i. E8 t; v
(command "union" tstmp "")
6 ] \4 N2 ]( N: O- H8 X$ N; j ;-------------------------------------------------------------------
- Y. j. d$ j! x: ^( t ; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）/ f$ r$ G3 o6 [8 C( q, n0 S7 @; N
; 得到的实体再切除到指定的螺旋高度
2 {2 f v l0 o4 I& H& R' k7 B ;-------------------------------------------------------------------
9 I1 C6 B- ?) m: g& [& i (setq e (entlast))' Q/ p+ _6 t8 d4 k
(command "array" tstmp "" "r" ttal 1 threadpitch)
8 u' y5 m* z9 `" Z. G (repeat (1- ttal)6 J/ x" |, M9 B# b
(setq e (entnext e)7 \8 L8 f9 M+ W" ^5 M8 x! [
tstmp (ssadd e tstmp)4 I u$ u; [) l% y6 g- y
)
7 L6 K4 V2 G# w! V )
- h( B/ w/ X0 F. W (command "union" tstmp "")
- R7 [9 M# _7 j: m1 ~$ B) `+ i; 若开始创建45度的圆锥
( |4 ?9 G Y9 r' S- [2 `$ q (if (/= startcone "order")
+ ]" P+ K; H2 k9 Q, E" e: L4 f (progn (setq e (entlast))
; C9 x. T- k- G. i7 B (command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))/ F1 Y5 J p, q0 |6 }
(command "union" "l" e "")
) [+ q5 m: C% C' v& a, }1 L )+ j* |8 C0 q }5 Q# A
)
3 Z6 u1 s" d+ ?0 g+ W% H+ g (command "slice" "l" "" "zx" pttmp11 pttmp12)
0 Y) U1 z3 a; q3 `" s. A (command "slice" "l" "" "zx" pttmp12 pttmp11)- k* s, {+ X, |
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
1 g. p5 G: W; Y( l) v5 |/ C; 创建最小直径的圆柱体，然后与螺旋作交集
1 c/ V( @* A1 ^( K/ \- x @# V! V9 d (setq e (entlast))
1 ^+ q8 l) n7 b* e9 X (command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
3 ?( @1 X7 X- f (command "union" "l" e "")
' u, j: K" @# f _+ g (setq tstmp (entlast)); g4 {' C2 h2 Y4 b x# M" t% X, l
; 创建中空的圆柱体" u' D1 e( i( b9 b7 p9 g4 n) c
(command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia8 u/ k7 [1 Z0 d. G0 V, E0 ]
(setq e (entlast))
% p' D( x$ }. N2 D3 d- n4 G; 若最后创建45度的圆锥
1 B3 z4 p( Q8 o. v& O+ } (if (/= endcone "order")! n' A# l4 N- H4 U# p/ m7 _9 @7 U- @
(progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) " t2 z2 a: t* \) F: D& j
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart)))
+ i5 `3 @- _4 u& t (command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))" ?3 ^; v; E) }0 n2 c+ `
(command "union" "l" e "")
+ ]1 W& l+ j3 b1 S( S6 n/ _0 i (setq e (entlast))7 @, ~- F( v- G% k3 n7 J* l; G
)
( a# Y' ^( m. k! g% P )
( f: O0 B G" }* |" j4 i( g. Z; 从大圆柱中减去小直径圆柱9 n |+ K" v- j
(command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
* T$ z* z. M( r' R8 L' x2 j (command "subtract" "l" "" e "")% W- S6 Y/ f0 S0 ]
(setq e (entlast))1 O& X: S, Y+ {5 H
; 从螺旋中减去圆柱% Z% \3 d8 l% {9 p2 a; I
(command "subtract" tstmp "" e "")
: ?6 R3 c! @8 [; K+ G; 如果螺旋长度为负然后镜像+ l7 x- Q. ~+ J5 W5 E
(setq e (entlast))
2 j4 I- V! `9 Y! ?3 B5 h (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))5 w- f" B/ K# `7 a
(command "zoom" "p")
: d3 N8 E) M5 T4 F0 o; (command "undo" "end") ; 结束undo步骤
- X* B1 B, o) q. D" ?$ i4 i- i9 w- ] Q)
& _" E+ r1 P+ t;;;---------------------------------------------------------------------------------------------------------------------;
9 {' O5 K; c, U/ r* Q$ T(arxload "geom3d" nil)
E6 f4 i Q, f' [% @(princ "\n3DThread 已加载。 ")
. h t+ m5 W& ~, n5 I1 b(princ) |
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发表于 2007-2-27 20:30:11
