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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()- R& v; o, X0 @% z! [% N- i
On Error GoTo 102 m- ]4 _) B# z) }
Dim La As Double, Ll As Double, O As Variant' F' |8 c+ L; O, a2 {
Dim Alpha As Double, R As Double. L6 U- B1 r( ?: }9 k
Dim A1 As Double, A2 As Double, A3 As Double
# E" e2 D u, ]; } Dim Arc As AcadArc
' T$ W b) B" p3 k5 R+ b With ThisDrawing
3 u% L; {! u) C1 L6 T# x) }$ z. C La = .Utility.GetDistance(, vbCrLf & "指定弧长:")9 I" W* x* f/ W
Do Until Ll < La And Ll > 0
( |- B) [8 B# f5 _ Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):"); {" }( K. O4 _
Loop: ]/ b. S5 q& K- J" g0 G: b
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
7 C1 P5 m6 g7 p5 d6 d# s8 t/ { A1 = 0
8 G& |0 Y7 s1 a A2 = 3.14159265358979
) {9 L7 S F; C Do: a! Q8 R' p0 E9 ^& U, }( d" x; B
Alpha = (A1 + A2) / 22 n8 F' Y) {: U1 u, J
A3 = La / Ll * Sin(Alpha)7 B# b: m" o/ s1 E9 L+ u/ J
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
' L* K! |1 i, p) I' |0 J Exit Do7 k& m+ j% G, D' P( m3 c5 a& d
ElseIf A3 < Alpha Then7 A+ g3 r1 C# Y6 T& ~7 r
A2 = Alpha; F6 k! M5 r* C! t) A
Else. k. D) V9 x h& n0 c- h
A1 = Alpha
: h4 h, l* l$ \1 G End If6 h& x) X8 X7 Q, r; W! }+ x7 P
Loop+ @* X. d. Z3 W* u7 n7 c
R = La / Alpha / 25 R( s7 H' Q h4 [/ Q: i9 K
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)0 e& |+ l- D6 S4 H4 o; x$ L% f
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
5 J4 H% \! r5 s; h' H End With( M* z8 @2 p& |# Z
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
