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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A(). l k, F/ _ @% R1 S b% @
On Error GoTo 10
$ ~ f. {4 {. H$ D% i A" d$ ?( w Dim La As Double, Ll As Double, O As Variant
# `6 v: X( N& |) N' Y) A9 D+ o/ _ Dim Alpha As Double, R As Double
2 s+ ]4 K& w r- q& m3 {5 ` Dim A1 As Double, A2 As Double, A3 As Double( q n( W9 T3 f8 X7 P
Dim Arc As AcadArc D* c( I7 W5 u6 M
With ThisDrawing% }; h( l+ \/ I) t% J
La = .Utility.GetDistance(, vbCrLf & "指定弧长:") \ D: G7 R4 d" ]* K8 Y
Do Until Ll < La And Ll > 0" t* q Z2 o: T/ g$ |" k1 e) O* V
Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
, o) W& G2 R5 {/ J/ U Loop. L1 e! W# i" [6 b3 N- {: e
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
) Z2 \- a, T4 s C! x& w! D& L1 P A1 = 0" T/ S3 r9 }# l U* l! G5 M
A2 = 3.14159265358979
" u' S! ]0 Z0 c! n; F/ C Do+ Y# E/ U% ?4 e% k6 h
Alpha = (A1 + A2) / 2
2 ^5 G( I" H. G* y- e4 C, M A3 = La / Ll * Sin(Alpha)
$ W0 F6 Y& T& R; o) _ If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
1 h8 k- f+ i8 F6 v Exit Do
/ U" A/ E6 G9 v' X ElseIf A3 < Alpha Then
1 ?' @0 v1 G( I' W) ]: @4 a A2 = Alpha
, B( J1 M8 G8 F1 j- P Else
/ R6 b! Z% w! B$ f A1 = Alpha
8 i( C: |) t& R) e9 r( ^( f$ D End If5 Z! }3 N( j" Y n' m8 \9 T
Loop
. D- @7 z4 `% j/ | R = La / Alpha / 2
6 Y' [+ G; w$ a Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
9 |' Z9 ^( k! f& V; A8 l .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint3 r5 C5 E+ I- J* y9 A1 `3 b
End With4 p0 j* @+ W' r' {3 z* J7 m8 ?
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
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