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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()
) V6 a) ]; [* V6 Z% r: ~On Error GoTo 10# J# Y( Y) x6 V6 r3 T q) E3 \
Dim La As Double, Ll As Double, O As Variant( d/ t% m7 e" N- @, ?3 z. I- x& r) @+ q$ Q: }
Dim Alpha As Double, R As Double
1 |' Q, [6 W3 {& N+ ]7 R Dim A1 As Double, A2 As Double, A3 As Double
$ c; n" W" H0 P Dim Arc As AcadArc& R1 M9 d4 f; L% s% t& \+ n
With ThisDrawing
% q/ x9 T# F: C" M/ w La = .Utility.GetDistance(, vbCrLf & "指定弧长:")7 T! Y8 W7 t; U, O! I! l
Do Until Ll < La And Ll > 0
7 Y2 } u# c' H Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
$ X" w; I: q# Q* b4 A Loop0 v! {" k1 p$ }* T* a
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")3 w5 o( P, m+ ?1 e* q" j7 D9 X
A1 = 0
3 {# p0 H$ b, \3 t- o" T A2 = 3.14159265358979
0 x7 h0 x5 v; ^: K Do% O3 a1 J: U& j I8 w+ @4 V: n6 {
Alpha = (A1 + A2) / 29 X! _' s: A0 e9 T' }0 [0 s
A3 = La / Ll * Sin(Alpha)) }7 e+ H% _! ?0 O$ W
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
5 o% W/ W* Y* K- i6 u Exit Do' Q$ l& E% S2 D% u8 O& w
ElseIf A3 < Alpha Then
3 i% A. f; W1 e5 n A2 = Alpha0 ?0 j' \; ]. W# V9 ^+ C' { f
Else6 u' r1 k* X# Q z* e
A1 = Alpha' ]( ]8 L& x3 Y& m, N
End If% ?- }# t/ L$ X, Q6 q
Loop
5 E c, j( E6 \0 Z R = La / Alpha / 2
/ @* \+ `0 Y) r Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
9 e# L' ?/ m) i- i7 y0 y .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint% `" L- X6 S; Q* F4 G6 a
End With
) W5 p% [1 R$ K$ C3 H6 E. F9 o10: 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
