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发表于 2007-4-6 19:00:23
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来自： 中国
Sub A()
. ~! L- X$ F. |, U9 @2 ZOn Error GoTo 10- m; h. [9 N. e4 g/ u
Dim La As Double, Ll As Double, O As Variant
& L3 n2 X; x' f+ l& _$ x Dim Alpha As Double, R As Double
# ^0 J! j4 _ @; Z7 G Dim A1 As Double, A2 As Double, A3 As Double* D. w+ k. M: {3 s
Dim Arc As AcadArc
6 n; D: f E9 J* G* K3 C$ b1 x With ThisDrawing. r$ _* x) T8 I
La = .Utility.GetDistance(, vbCrLf & "指定弧长:")2 F6 [3 j5 j% L$ |( I. w/ M
Do Until Ll < La And Ll > 0. P& b5 k3 v6 I& e
Ll = .Utility.GetDistance(, vbCrLf & "指定弦长(小于弧长):"): H6 _% {/ S5 ?' x" O
Loop. m1 v2 C* |- G$ r O3 T
O = .Utility.GetPoint(, vbCrLf & "指定弧的圆心:")
! N5 P* d+ q, g. x* {9 e0 x9 | A1 = 03 C2 n% F) {; \
A2 = 3.14159265358979
4 v' y/ {2 F, D$ b Do+ L2 D& {" {2 X: N& W
Alpha = (A1 + A2) / 2
2 w0 V- v6 P! Z6 k" \ t: w( \ A3 = La / Ll * Sin(Alpha)5 H( ^5 V* V1 U" S
If Alpha = A1 Or Alpha = A2 Or Alpha = A3 Then
, |) w& p9 i* A9 J Exit Do
! L7 t+ N6 l2 {+ N- I) K1 j* s ElseIf A3 < Alpha Then6 {+ ~4 o# _# R: k% `/ o: d
A2 = Alpha
) S J. ]: v% Y3 L/ }0 ?( l1 g+ a Else! M- c6 W# I% E' B) I
A1 = Alpha, g. u7 Z) B5 Q. ]$ C! t( i
End If4 P5 Q/ n0 H/ R' m
Loop
+ m% k" W% u5 R1 z, o- k R = La / Alpha / 2# C( o4 o1 d* |) s: H* I" O1 c- C' C! i
Set Arc = .ModelSpace.AddArc(O, R, 1.5707963267949 - Alpha, 1.5707963267949 + Alpha); H7 X" A6 b) X0 `" L. Y, @
.ModelSpace.AddLine Arc.StartPoint, Arc.EndPoint% U+ D, ]8 L: e1 @: A7 e. @; Y
End With1 R, ]: ~( \" j& B
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
