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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()
+ c5 K7 r1 w9 {3 F; m LOn Error GoTo 10' I( i9 A6 R" t5 ^+ i/ ^$ o
Dim La As Double, Ll As Double, O As Variant; E- a" b: c3 ^8 B6 _
Dim Alpha As Double, R As Double! F c4 F% M# G( n5 I8 {
Dim A1 As Double, A2 As Double, A3 As Double& V$ }' m8 _: `& w9 h
Dim Arc As AcadArc
+ o$ ^2 c3 \2 _$ J& w With ThisDrawing
8 F+ `/ Q0 |/ R4 c4 p2 ^2 p* z La = .Utility.GetDistance(, vbCrLf & "指定弧长:")
& g/ v0 J! v3 F4 d Do Until Ll < La And Ll > 0
$ Q3 Q* {& R3 D) s% C1 {/ ] Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
' D! U, b, a7 C' Q% Y. R6 D Loop
3 x$ C# z3 i6 \/ ?' T( {; L( S O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
~6 ?1 V3 t, F$ a) `+ @ A1 = 0: B7 d8 W5 ^8 O' Z6 q: g
A2 = 3.14159265358979+ z4 R3 Q/ Z0 K' E
Do
' |8 l0 I5 H: j: r& W s! j9 [ Alpha = (A1 + A2) / 2
' D* t# E# @3 z$ h/ y! e2 _) g; ]( J A3 = La / Ll * Sin(Alpha)# |2 s$ {6 h) C! |$ @
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
/ I! c& K8 ^% |# x; ` Exit Do
* T0 ^9 W& r. v9 P ElseIf A3 < Alpha Then1 n$ N7 e7 f ?- y2 o7 ~* B) X
A2 = Alpha
) m: \1 o9 {" Q Else, D8 v' J$ T# R( `
A1 = Alpha
+ X' m- m" J& z% Y6 Y1 i End If
6 j& S5 r( L: G, n6 t+ {% X Loop
5 U% o9 g+ v" m/ m+ ?1 q R = La / Alpha / 28 p8 G9 Z( B& G7 Z% y. f% Q3 x# V
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
8 p1 i8 T5 F: f/ d0 ` .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint% @7 F' m- { P! P
End With! i) _% O: c5 E% C/ k- J
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
