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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()
' c+ q/ H1 M) ~% `( L3 KOn Error GoTo 100 _) p7 ~) T) \- N. e4 q
Dim La As Double, Ll As Double, O As Variant4 J- Q! K( [$ @8 Y
Dim Alpha As Double, R As Double
* g( K N7 D# h. Z, _4 l Dim A1 As Double, A2 As Double, A3 As Double
0 D: Y+ D0 s3 J& x Dim Arc As AcadArc
1 d5 q7 T% F; A2 l- k H& `, j With ThisDrawing2 ]" ]6 e# Y- \8 k! A8 A- O
La = .Utility.GetDistance(, vbCrLf & "指定弧长:")
. Q, e5 t: K4 t9 E( H) N Do Until Ll < La And Ll > 0) A X9 P% k& t
Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
4 R9 D# S$ p* u5 e" _9 h Loop6 H, Y0 { h6 e/ u
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")" U; O, Q: k1 Y: `8 m6 t1 M* _
A1 = 08 `% i4 [0 T/ j
A2 = 3.14159265358979
4 t+ W" J( n# ~3 S% O6 |2 u6 x$ e Do
0 q/ p% m; h$ J* r Alpha = (A1 + A2) / 2
, V0 M g! z9 S; h, Q6 p A3 = La / Ll * Sin(Alpha)
`( ]! R( J" v1 n5 A1 X$ J If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then9 Q w4 d$ A7 ]+ M0 {
Exit Do8 _. h4 ^$ B% B
ElseIf A3 < Alpha Then
% R- \, L9 q9 [. h0 f A2 = Alpha" ]. S2 ?% `2 L; @
Else
, ?; K( X- }; g4 O4 @ l% T A1 = Alpha
; w* s( V$ l' Y! |" m6 S7 {; K End If
+ d3 ?1 f+ p/ \9 b Loop
- l% s; `5 {! U, Y5 }+ Y& Q+ Z% F8 z R = La / Alpha / 2
( j/ `0 D2 _4 s Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha), T3 w" o' p' H' ~ b
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint4 v* z! M, ?9 l) c
End With# [3 O M# M5 u1 r1 d
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
