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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()6 @3 y2 n( d [, M- S
On Error GoTo 10% o6 s0 h- L* D( C3 c6 E
Dim La As Double, Ll As Double, O As Variant& A) g& v* \- Y: {
Dim Alpha As Double, R As Double
, n' x+ l1 H/ m W- j, E# J Dim A1 As Double, A2 As Double, A3 As Double
2 n, y' b( }* a0 k Dim Arc As AcadArc
" y/ ?7 U3 V: _& g" i2 i With ThisDrawing
$ g. b4 K3 ?& R. M- I9 Z* z La = .Utility.GetDistance(, vbCrLf & "指定弧长:")
5 f+ G7 X9 V/ g/ _9 j Do Until Ll < La And Ll > 00 t7 J0 Z6 x( Q- X3 t
Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):")
/ n$ w! y5 }6 l" H' K7 v" r Loop
) _# f, j- \2 J O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
- K7 o7 n! s- g) U0 T A1 = 0
4 h; b4 \& z3 I4 W( z" a6 L A2 = 3.14159265358979. }: W7 c1 a6 r+ d- M$ \+ H
Do7 r1 y. c5 @6 L6 o
Alpha = (A1 + A2) / 2 [2 n% Z3 ~6 R) N8 p4 A
A3 = La / Ll * Sin(Alpha)& P4 D; y0 ? N5 I+ q
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
8 C3 `1 P( {. C% @: }6 ^ Exit Do
: h; l0 L+ C! }+ d2 n) n( B2 Z ElseIf A3 < Alpha Then
3 X6 L. U! k2 L. Y+ M A2 = Alpha2 d! L" k* J$ K7 z" Y
Else% @9 }7 [8 T4 U( e
A1 = Alpha
- w+ m& ~1 j' q! J1 ^: c& x End If- [: T, X' e7 H3 J9 \
Loop
- \4 N" O5 O& F ]) r7 E5 ~; e R = La / Alpha / 2
, E2 ?& ^" P/ O! h# x Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha)
1 K( J* y/ V" p: h" w) d. v3 ? .ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint
' g' X" l d8 n; S End With; ]" \4 u# Y% N( u" O
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
