|
|
分享一个AUTOCAD渐开线画法小程序:
) ^6 ]+ M% f1 ~! |; r1 L% w
! _' M& v5 K7 b; E3 p Sub jkx()
# _! I2 Q3 ?* B; Y; J! e! G Rem 绘制渐开线,* o. a U& E) p# J/ k0 X6 m
Dim d As Double '节圆直径
4 o' ^, R2 [* {0 V$ {( t Dim r As Double '节圆半径% F3 W; q3 |; T2 N( U {
Dim A As Double '总展开角度: E0 q# _+ W- P" |9 j4 l" P
Dim Ai As Double '展开角度! w [+ Z3 y& ^% F0 g
Dim Li As Double '展开弧长
4 \( }5 k/ E' g d = 100' E3 I0 @) S5 u& [& d, D f
A = 360! Y; I: f2 {4 f+ ~# b; m
r = d / 2
* ?- B9 x1 D3 v0 k+ P: K& y1 V0 u Dim Pnt1(2) As Double
2 D+ w, l# Q1 x1 K: [ ~6 b Dim Pnt2(2) As Double
$ N/ e0 ~# S+ P$ V3 W2 M Dim PntLst() As Double, N As Integer
9 ~! T1 ?- w/ X$ g" v' x ThisDrawing.ModelSpace.AddCircle Pnt1, r$ `! \( _. _: z
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#
0 R" L7 F3 i( e, \! R0 L1 V) v Li = r * Ai
3 c9 V' l8 x* Z5 r9 A/ c: }( y( V Pnt1(0) = r * Sin(Ai)* _, i( E6 V( E4 s1 [4 Q
Pnt1(1) = r * Cos(Ai)( b U9 N" r6 z' \, g2 C4 X
Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
/ ~& ], i X* }5 T, c5 U6 i Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)8 s/ t6 e! b" l& w9 Z$ ]
ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
% n" N" N5 I) U! D: S/ A N = N + 1
: {4 R# e. U- m$ W ReDim Preserve PntLst(N * 2 - 1)
: N2 W3 h' w! b6 e1 n& l PntLst(N * 2 - 2) = Pnt2(0)
( w7 P1 ~7 F% ` PntLst(N * 2 - 1) = Pnt2(1)8 ?% c$ V% W; q2 z
Next
* A F+ z9 \ i$ q" _% ? If N > 1 Then- a1 }% |, y" l6 U8 s! q
ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst W: i* K* o* i. k8 M
End If
9 w; U8 J- D) lEnd Sub O! [' a4 J$ [3 t& W$ l
. F& o8 n, c0 b, K1.进入菜单:工具>宏>visual Basic编辑器;, i+ Q/ P" {1 g1 i& U' m. z5 w
2.在编辑器中选菜单:插入>模块;
0 b8 Z. U5 y6 Q+ }3.把这部分程序拷贝到（代码）窗口中;9 g/ b" k; Y+ f0 w( d7 n
4.选择菜单：运行>运行子过程用户窗体;; l, n, K, L* h3 f
5.在AutoAcad绘图界面中可以看到结果. |
|
发表于 2008-1-30 21:58
