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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A(). [9 i2 `9 s/ Y9 Z! j
On Error GoTo 10
; |) V8 F- G( I6 h Dim La As Double, Ll As Double, O As Variant
* u8 O! }9 A$ |! j* S" h Dim Alpha As Double, R As Double! A# T z! Z: b8 h4 E# d
Dim A1 As Double, A2 As Double, A3 As Double
M/ r; K; {: u7 e7 g' s8 }1 K Dim Arc As AcadArc
& ^8 y1 c" ]2 |( z( G With ThisDrawing1 m# S* V" v7 D& E! _" x0 @/ u
La = .Utility.GetDistance(, vbCrLf & "指定弧长:"); G$ u& v% E: E$ i1 C) k; q
Do Until Ll < La And Ll > 05 P7 r; `' i6 d5 C
Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")( P6 ]( n5 ~; F) O" J. m: v& N
Loop) O' I2 d& z. H" s- k
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
+ X: N; s0 q) |" G o A1 = 0
h8 X, n8 L/ Y8 z0 _ A2 = 3.14159265358979
% A |6 K* L/ u( @( x7 I Do7 @' I0 L+ s' W
Alpha = (A1 + A2) / 2
4 z" k) G# m( V R; p. z& } A3 = La / Ll * Sin(Alpha)% {' r# q, y. z) G) y6 N% {: c% v
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
4 ]& Y/ j+ m) l7 {# z Exit Do* [' ]% [) @2 g( w, c
ElseIf A3 < Alpha Then9 g9 d3 Q4 t5 K- F; B) K# u* k- o
A2 = Alpha; x7 D: t/ A% X
Else- Y7 c f1 {" K, c M) I) b
A1 = Alpha; u& B- L' y! P/ L% l' d
End If
! I2 j6 [6 W1 S7 @* t Loop
( u7 m/ E- k( L6 t R = La / Alpha / 2
# g1 f0 N4 }5 v! w; L: ~ Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)$ `% ~$ N; j6 N, }
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint) ^- i8 E6 W% @' j/ I5 e# B
End With
2 A) b& Z% |& r$ U' o) _* |9 I: m10: 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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