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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()+ y* @: f3 o. w1 j* T
On Error GoTo 108 {" t& l% {5 z; z. r) B# T! T/ l" G
Dim La As Double, Ll As Double, O As Variant2 X( N! S5 S/ t/ |6 i6 K X' J8 G
Dim Alpha As Double, R As Double
`: G/ K6 m- e3 W' A+ ] Dim A1 As Double, A2 As Double, A3 As Double- T. p3 Z, e1 f- {. a
Dim Arc As AcadArc$ A2 _! J# G& d$ z! m J8 i
With ThisDrawing) K- ^9 D& n( p: J% h, n! i
La = .Utility.GetDistance(, vbCrLf & "指定弧长:")/ |: o e+ d* S! T+ \( l2 w2 R
Do Until Ll < La And Ll > 07 P8 d, ?/ S7 ]; k7 O/ b
Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")& C/ |2 F1 \ y( p
Loop4 M. b7 S& a' b, a- w1 H
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")1 d: Z% |) c* C; o9 F! J& d$ ^
A1 = 03 L/ y8 v6 r4 W! f7 J0 g5 E
A2 = 3.14159265358979# I, @4 ^7 u. {4 o
Do. {; m3 \3 }8 t+ I; q
Alpha = (A1 + A2) / 2
7 v( W" g+ R7 B; B/ P% J0 P0 v& H A3 = La / Ll * Sin(Alpha)2 _% X) ?1 t5 l- z, A6 w; Z
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
* `! a6 q$ x) n! P+ h" a" e4 t) N Exit Do
[( k+ m/ ]& l ElseIf A3 < Alpha Then4 X, t( g7 E: g: c' N- V0 U8 f
A2 = Alpha- u- B. O* t8 A+ G3 M# b
Else3 r A/ F7 @+ T' s, t9 |
A1 = Alpha
4 o( ]2 x: p) I7 x( }# F" J0 z End If
( K7 r' i- n! j9 V$ f% H Loop# r: P' H( s9 e5 d( E# G
R = La / Alpha / 2$ w& m% }2 A$ t: b7 x: o: ?1 w
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)1 B. a" i4 T: Y
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint9 a8 H$ [9 n2 ?5 _
End With- ^+ u: _6 j" W5 D6 I
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
