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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()
* v" W+ I. i& D0 E* X+ Q& a5 n' KOn Error GoTo 10/ e& G3 F" O) [: J! k
Dim La As Double, Ll As Double, O As Variant
4 o) L$ y' i; g Dim Alpha As Double, R As Double
% b+ \' M/ c- y8 F* E Dim A1 As Double, A2 As Double, A3 As Double- F" b5 }3 \0 }" P8 s
Dim Arc As AcadArc
: d9 s% q9 c- B: b With ThisDrawing! a$ i e3 Q' W% z, O7 K+ N0 [
La = .Utility.GetDistance(, vbCrLf & "指定弧长:")( I$ ~0 G, S" p _) q3 b
Do Until Ll < La And Ll > 0
1 {/ b- K0 G3 q4 D B Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")1 d$ Z: U. o) z/ L4 v
Loop
( z2 o% d: h u v3 s- c O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
1 B7 ?; A' n% F! e5 ?( A4 ? A1 = 0* a8 e _! t) U/ r( R2 C3 m
A2 = 3.141592653589790 v' h2 ?6 `% o1 [2 F
Do& s! V8 L; u& S! ]0 X
Alpha = (A1 + A2) / 2
- ]' B- O# {) s6 r A3 = La / Ll * Sin(Alpha)9 w+ k/ f' m- D M0 m; F0 k
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then; f& K0 E9 O4 A0 ^
Exit Do0 A: G) M: E% B5 Z! u
ElseIf A3 < Alpha Then
- _4 I' u. p$ y8 i) r A2 = Alpha! G( I* G7 s$ o, T
Else
) f1 Z( t/ _5 j# f( t+ T A1 = Alpha
0 ]2 l& A& e/ d6 h3 K; Y' I' |. k End If
, _9 b9 Z# @6 W Loop Y# h$ q6 d2 ?6 x9 Q
R = La / Alpha / 2
+ a6 S* m7 T$ ~3 a" } Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
& k1 K! j5 M0 Q# P$ y9 T9 X2 L .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
3 S4 W5 D* g9 a* z0 K3 k6 r End With
7 {$ U0 |6 T8 F) n7 a r10: End Sub |
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发表于 2007-4-6 13:59:18
发表于 2007-4-6 16:20:03
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