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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()* k7 H. j7 {7 M- c
On Error GoTo 10
- B: k6 ~ x5 P3 V, X* X Dim La As Double, Ll As Double, O As Variant/ M8 M X8 I; z3 T# a2 r
Dim Alpha As Double, R As Double! a5 j6 Q0 h, k+ u! H) E
Dim A1 As Double, A2 As Double, A3 As Double
' Q3 l% ]& A3 n* Y {* G7 k Dim Arc As AcadArc- I. U9 [: o7 g
With ThisDrawing
( L* T0 J. V3 Q) V4 | La = .Utility.GetDistance(, vbCrLf & "指定弧长:")
/ N( F- }9 d- q8 H; b% U- ?; b y Do Until Ll < La And Ll > 0
. ~5 T: \: B& N9 `( x+ W Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
% \: p% L! L" k! j, s Loop; O, ?# B g1 c. n# ]3 i& S
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
) e6 p* |0 ^. I5 q) [ A1 = 0
$ D1 Q5 R; p |+ I w' } A2 = 3.14159265358979- P3 P. z4 j( J2 L. t
Do" Z, e% H( X& c: [3 {8 O$ K% q. y
Alpha = (A1 + A2) / 2
( T0 n \8 l$ h6 r3 o$ p A3 = La / Ll * Sin(Alpha)( o) Y+ |! X5 B% {3 Z3 z
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then5 X6 `( E: ?8 x. m
Exit Do
. P z& ?; h3 R% l ElseIf A3 < Alpha Then/ Q7 u' E( a' K6 P) A+ o
A2 = Alpha0 W A) g* z( ^% M( |" O) T; x! r
Else
/ ]0 C: {/ f9 R& m1 z$ a" y# X A1 = Alpha
' ]( i& |( X3 L, c4 d2 ? End If
7 U7 I4 L1 r( ]7 d* B* D3 k0 I( d Loop
: ^, C1 B- b: W6 y0 @0 \& S R = La / Alpha / 2% s' Z5 b+ T# O1 s8 n& a& ^0 ?3 q
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
% Q5 N6 T9 f# \2 h$ U- i .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
k1 f+ p* O5 j7 p n" v End With
3 s" ^( I* e0 P0 h8 C0 @+ g+ J10: 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
