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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()4 |6 @4 P6 H5 [" B
On Error GoTo 10
, f3 Y7 V& P: Q6 \5 u/ Z Dim La As Double, Ll As Double, O As Variant
4 s4 z; T; R' Y% U$ L# O) H1 {; C# P Dim Alpha As Double, R As Double T z4 |/ i+ `
Dim A1 As Double, A2 As Double, A3 As Double" `; m7 V; j3 \: o! V0 F
Dim Arc As AcadArc
' _- ?+ L2 ?6 w9 S+ A With ThisDrawing
$ }9 u4 L9 Y2 U3 Q La = .Utility.GetDistance(, vbCrLf & "指定弧长:")
6 p/ n& r# `: d+ I4 O/ H' l3 L3 \' N Do Until Ll < La And Ll > 0
$ ]4 F# {% d, g& H @ Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):"). s2 g1 D \, a5 @2 X5 j/ J6 r
Loop" V/ F, |) y2 M: V1 C3 z2 u) h
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
+ a% s4 Z) q0 Y A1 = 06 a4 E/ M' }" E2 k5 ^! h
A2 = 3.141592653589790 A% M; ~0 e$ v* o9 ]% i
Do) g$ q1 E6 h+ o( X9 a6 z
Alpha = (A1 + A2) / 2. ~% `9 m, X( Q& G2 t8 z
A3 = La / Ll * Sin(Alpha)% U( ~5 C" n4 X
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
, W) l# m, s; {( X2 u* z Exit Do: L7 n3 W* @3 m% D& ?& K5 m" L
ElseIf A3 < Alpha Then# u( E; |/ T) j) I
A2 = Alpha/ k/ y8 C% [8 D* F
Else
4 ^2 C. {9 j" G0 K9 k0 d- q: [ A1 = Alpha+ W" o# n) {6 m
End If
' E8 p! }+ i# }, z Loop4 E5 B) c5 d4 z1 ~
R = La / Alpha / 20 E) J2 A3 [" F2 |( e7 ?) V* X) s
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha). s/ i7 L4 ^( V
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
9 n; }, o6 Q" |! v; P$ u# F1 v* | End With
( D$ y% c& @ o$ ] i L. C10: 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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