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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()
, }. g4 k" W- V7 O+ e- d% C5 bOn Error GoTo 10& R: F5 F M3 i
Dim La As Double, Ll As Double, O As Variant1 [/ q9 c0 n8 R0 ^
Dim Alpha As Double, R As Double. d9 ]6 J6 L5 s1 A; u* W/ T, g
Dim A1 As Double, A2 As Double, A3 As Double8 y5 {5 C, q* Y' K& y5 Q4 E! F
Dim Arc As AcadArc) ?# h1 U9 `- M, k- a4 D
With ThisDrawing
% S) w0 C$ A% I4 D. N La = .Utility.GetDistance(, vbCrLf & "指定弧长:"), o, I, t7 S3 L. i4 H* A. S2 z. n
Do Until Ll < La And Ll > 0! _& O5 X- p+ S: ]( |: v7 q7 a
Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
6 U( i; h: K t& l b9 ^ Loop( S: \% h3 B7 T7 o
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
: |% n- D* F- P A1 = 0
1 J7 d! H* }$ m2 J A2 = 3.14159265358979
$ r5 G1 d6 @. v7 }" u Do7 V( u! B9 }2 i, Z' R2 x
Alpha = (A1 + A2) / 20 \& g7 P( r- K, ~
A3 = La / Ll * Sin(Alpha). U/ E; A7 G( V# u
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then: }. A( o& b/ A) K
Exit Do
) _; Z8 h* O1 e: ~: T9 q2 H. O ElseIf A3 < Alpha Then
' H& K; `3 H2 A/ o( B; l, Z* y0 B1 V2 b A2 = Alpha8 r3 A3 D4 B( X) r$ x
Else2 n7 R- Q8 Q5 T; n6 t6 r* B2 m
A1 = Alpha' O2 ^) N$ Y8 L
End If
, {, K4 j& ^. [/ A Loop+ D h$ ^( u) T5 y- e
R = La / Alpha / 2
7 R7 I8 ~; g+ I Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha), t4 J4 y* ]) R( E1 H9 X
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint" x) G K" ]" D3 ^/ N" m
End With0 n* U& A; P/ q+ I8 y$ A8 n
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
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