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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()! n0 ~6 F* ^; K9 `! x# i
On Error GoTo 10
( h7 @8 Y6 V7 F7 E( r Dim La As Double, Ll As Double, O As Variant. B* w W0 D' V. q6 [4 N( K, o( K
Dim Alpha As Double, R As Double
# a/ Z4 R: ]* l A3 z6 X1 V! o0 n Dim A1 As Double, A2 As Double, A3 As Double
) R2 C: w T3 L" D8 c' d Dim Arc As AcadArc: D0 q# d3 ]1 m4 o* [3 A) \
With ThisDrawing2 G# x6 Q, `. O: t0 x \
La = .Utility.GetDistance(, vbCrLf & "指定弧长:")
' H5 j& N4 C+ l Do Until Ll < La And Ll > 0
' v: P4 j M& V5 V) b Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):"): G% G5 C& o0 v4 j9 H" M1 D Z. G
Loop7 I* E' @7 S% e. W* p0 g- ^+ H' k
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:"): s+ Z% l: k$ c% b8 U" c; q
A1 = 0, K2 J0 |$ @2 Z$ T5 o
A2 = 3.14159265358979& ~2 D1 l e7 p/ ? ~8 i j3 f# I' a
Do( v+ C6 W8 y6 [6 x. i' D
Alpha = (A1 + A2) / 2
/ j" D+ x$ C, z A3 = La / Ll * Sin(Alpha)
0 `7 n! g a! \1 K( m0 p0 R* ] If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
; R$ t% X+ \; G, |& q1 ~: m Exit Do
; M6 `; N) t, ]" V/ |$ _$ N( ]$ S ElseIf A3 < Alpha Then, x( x+ V. L5 f; [. v
A2 = Alpha$ d* e; Q4 y& I$ e- a6 g! z
Else
+ e& B8 k# r, H- G8 o- A A1 = Alpha" X; m. [/ Y! G0 y8 Y: l4 j
End If& g# e: U" s9 A8 b; q" `
Loop3 T9 r8 A9 l u9 M
R = La / Alpha / 24 b" y L; u2 g/ Q% }5 K
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)) a, K' F7 S' Q5 F D. ]
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
' }5 ]/ h+ u4 B2 M: P$ Z% `. z End With {8 X. {! ?8 z- C7 l* ^
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
