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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A() Z5 R: \$ _) K9 T+ o9 q/ D
On Error GoTo 10- [. q* g1 H3 X- E8 J- C4 d
Dim La As Double, Ll As Double, O As Variant6 Z3 s5 c. n- x
Dim Alpha As Double, R As Double& J3 }1 b3 k9 u4 U" N
Dim A1 As Double, A2 As Double, A3 As Double' g* h: x- E$ s1 E
Dim Arc As AcadArc& W( |5 j- e# i* y( T
With ThisDrawing
! h& {3 G/ m. P: @. e La = .Utility.GetDistance(, vbCrLf & "指定弧长:")
+ Z. T, M0 {9 E7 I5 V: S Do Until Ll < La And Ll > 0
& Y$ z9 G! w( f Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
; y" ]7 [# Y: E B. ^4 V- f' _, M Loop
+ J7 q4 n& B# {% K. R$ ? O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")) q9 ~) F" O& e+ V0 i
A1 = 0- O P% X1 P. v
A2 = 3.14159265358979
g- j0 _9 A# ?/ q$ C Do
( Q- C& @! h7 ?; M8 y Alpha = (A1 + A2) / 2 C; f/ J1 P4 x* [3 K
A3 = La / Ll * Sin(Alpha)
$ {, Y( c( I+ P If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then% l% ~# @% Q6 Y3 t1 C: w8 H
Exit Do
( B9 G' h/ ~8 O ElseIf A3 < Alpha Then) ~5 _ B7 i: J) t
A2 = Alpha
3 P- {7 |$ E. ]7 C: e/ u9 P' U Else& ^. l) E8 c. @6 R/ ]5 @1 A5 t
A1 = Alpha+ Q+ I& c9 z5 m) {5 z0 m" N
End If; p7 H$ F. V! `1 T; X
Loop5 ?, Q. l; i: Y' @; x& G6 `
R = La / Alpha / 21 w% X9 F( \- J( F
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
X7 V6 O# u3 x. I' U$ R1 ] .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
( |2 d4 b9 H; M& ]) B End With
$ A% M; q2 E) M" a! F) @5 v/ A10: 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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