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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()( V! _0 e$ e/ G' Q! D
On Error GoTo 10
0 G- u3 Z9 p6 A$ q+ M) U" ? Dim La As Double, Ll As Double, O As Variant. b! H" v) v: Y4 @/ Y" \
Dim Alpha As Double, R As Double
$ }" `" W& u1 n/ ~: x Dim A1 As Double, A2 As Double, A3 As Double; ]8 F; q9 S+ A8 z. I
Dim Arc As AcadArc
Q2 @- F: A0 q! A. j2 Q& n With ThisDrawing5 D! Z/ X1 i0 y, ?7 s6 W
La = .Utility.GetDistance(, vbCrLf & "指定弧长:")6 x# x, [1 l5 W3 k* U
Do Until Ll < La And Ll > 0
/ |6 A/ s* J4 ~: \+ n$ k5 R$ Y. ^6 y Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
4 z, \* i5 p7 L# s( g& P: o$ i+ Z Loop
7 s- i b% r. D% J o O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
. _0 S6 X- z$ D/ W' f A1 = 0
0 w5 I. n1 O# N! } A2 = 3.141592653589798 X) [1 r5 `3 {! m+ y9 P3 @4 @
Do
& i" Z; P% o, a p0 h" \9 E( k; P Alpha = (A1 + A2) / 2
' `8 \- H6 Q1 g- R A3 = La / Ll * Sin(Alpha)
7 {; w. S- \( G0 @* d5 G! B8 Z If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
. m0 k a, r- H5 E; o c6 y( o+ G* A Exit Do
4 T0 m( C/ f$ t5 n1 p ElseIf A3 < Alpha Then7 g, Q) R4 J) H4 G6 c3 H \6 r
A2 = Alpha- P4 S# {! e" i! N) Y) ]
Else
4 P+ W' |9 i) f' d9 z9 o0 D8 R A1 = Alpha* O+ L# ?1 u# M2 z: e9 H( W; O
End If
$ h( r; X2 R! U" }/ i Loop. s5 K. Y! o1 `% e
R = La / Alpha / 2
0 I$ T6 \7 z7 `/ a+ ^ Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)9 r8 m2 i4 X. Z c- T
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint* Y( e. m8 X! Z+ q8 n
End With2 n i! n3 b. h7 G! h
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
