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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()6 z& @9 Q& Y+ s- W0 {7 ^4 v
On Error GoTo 10, C) `/ p( j; z7 k
Dim La As Double, Ll As Double, O As Variant* g* ~* {! h3 W
Dim Alpha As Double, R As Double
% R# ?: [, c/ i, w. }7 ] Dim A1 As Double, A2 As Double, A3 As Double
3 o z& B% k; d; s9 ? Dim Arc As AcadArc+ o3 q9 `9 x8 J+ A% @* \. q
With ThisDrawing k3 H3 f6 j: I3 u4 }+ r, w5 c
La = .Utility.GetDistance(, vbCrLf & "指定弧长:")$ X3 a% g" p# C' a" r
Do Until Ll < La And Ll > 0
9 P9 o+ X; V: ^6 [8 |. e Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
! T4 y0 ~3 J3 `3 U# h Loop- u% l) u- @3 Z& q
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")& V2 `) w, c% H& o2 [. m
A1 = 0
; w/ g! [2 q0 V: _. ~& d$ e# p5 t A2 = 3.141592653589797 z* t+ x* }( d4 j
Do! w, g5 M f8 q5 m; p
Alpha = (A1 + A2) / 21 `* D) I5 ~- f; ?5 A/ U L
A3 = La / Ll * Sin(Alpha)
2 X) _& F/ e& P( y If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then; S/ T7 ]' S$ m8 E4 ~
Exit Do
- n4 g. q5 z) j6 n x% W9 S ElseIf A3 < Alpha Then
9 ^, I. l3 l" o2 K. Y" i A2 = Alpha8 T* E+ f4 T6 K. P+ `
Else$ ~. H. r7 ~% I, v! Y
A1 = Alpha
* N1 g0 [" a8 D o End If
5 a/ ]! K! w8 N7 d8 I/ U0 k Loop
% l h% u5 k& m8 |+ I R = La / Alpha / 21 V. P0 I2 S% ?# K
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
, U3 I- g( P. a# h( F .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
: Q" @; E( e, |/ s7 S. j End With5 F! S5 }7 Y) t+ D; n' G
10: End Sub |
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发表于 2007-4-6 13:59:18
发表于 2007-4-6 16:20:03
楼主
