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做两个圆求交点，然后判断，两圆有交点时，程序运行正常。
6 Z$ x. |6 T' c# G* O. X; T% \" V( v问题出在没有交点时，我本想输出对话框提示，然而系统报警，说“类型不匹配”，各位看看怎么回事？
1 q2 G! Q8 I/ m- J" Y代码如下：
9 L2 ~, B v4 m) u8 C% V8 BPrivate Function GetFSupportCenter(BSupportCenter As Variant, FSwingBasePoint As Variant) As Variant
" ?) N# U% L! _Dim Testlayer As AcadLayer( {- |0 J9 L6 }( I7 U
Dim ObjCircle1 As AcadCircle '辅助圆
: u& c* m6 v* u) A J [Dim ObjCircle2 As AcadCircle+ `' x' E* N8 }6 r7 P, I( z' v1 `
Dim SWingLength As Double
! j/ Q4 W6 N- ^- v* c7 ^1 M1 eDim SWingPitch As Double" ~( k) F3 X$ A) P3 s, x
Dim PT(0 To 2) As Double* X+ Z9 |8 K. O6 R6 J: h% p. W
Set Testlayer = ThisDrawing.Layers.Add("非显示层" ) '辅助线位于非显示层
8 B" Z* B2 a' y9 k, jTestlayer.color = acRed
0 @' x! l7 y; m: m! A( FThisDrawing.Application.ActiveDocument.ActiveLayer = Testlayer '激活图层* [; q3 U/ X2 T( m/ Q
Testlayer.LayerOn = True
, |, X8 v$ [! w+ e6 dSWingLength = 2607
! r/ k* e9 f# q# W" ]SWingPitch = 3250
) s( [5 r) l6 \ K) D L$ g" \; v, l. P7 [
Set ObjCircle1 = ThisDrawing.ModelSpace.AddCircle(FSwingBasePoint, SWingLength) '作辅助线
$ f5 R1 L5 I7 m( x ]Set ObjCircle2 = ThisDrawing.ModelSpace.AddCircle(BSupportCenter, SWingPitch)
7 J' v% B4 W0 Z- s9 I1 M {
# z1 w1 d w2 p# D& b0 G6 v% n# CDim IntPoints As Variant
1 c5 N0 @. m% b6 N% _/ v IntPoints = ObjCircle2.IntersectWith(ObjCircle1, acExtendNone) '获取交点并判断; z; {' U. V* n" [8 h7 G" H
. @/ O5 s3 J S% r6 m2 p. T4 ~5 H4 I
If VarType(IntPoints) = vbEmpty Then
3 z! G3 O f2 E& I) w* Z3 ^# b6 WMsgBox "没有交点!"$ [1 [- E6 y" N; J3 F3 z
ElseIf BSupportCenter(1) = FSwingBasePoint(1) Then" b# _" o ]# G2 j$ y! ?: N
For i = LBound(IntPoints) + 1 To UBound(IntPoints) Step 3
6 h6 b. A+ k9 W& B On Error Resume Next$ F _: A. }. U* G# b/ t
If IntPoints(i) < BSupportCenter(1) Then' v" t! k3 V+ o9 K* r+ _% c
PT(0) = IntPoints(i - 1): PT(1) = IntPoints(i): PT(2) = IntPoints(i + 1)4 J' m0 U$ X0 _$ n$ O1 S
GetFSupportCenter = PT '函数返回值; P, P, M# Z9 r8 V, m
End If
3 f/ t3 {. l3 T: H* { Next
0 Y/ z8 I( J, n iElse
! M& D; c4 r. m+ o& s8 VFor i = LBound(IntPoints) To UBound(IntPoints) Step 34 S' B8 G+ e$ z
On Error Resume Next
+ S" T: t1 G/ J/ K If (IntPoints(i + 1) - FSwingBasePoint(1)) / (BSupportCenter(1) - FSwingBasePoint(1)) - (IntPoints(i) - FSwingBasePoint(0)) / (BSupportCenter(0) - FSwingBasePoint(0)) < 0 Then
7 F1 T |) h6 C1 }! q PT(0) = IntPoints(i): PT(1) = IntPoints(i + 1): PT(2) = IntPoints(i + 2), R1 O" s6 a: {9 J* e$ e1 y
GetFSupportCenter = PT '函数返回值0 m8 j8 S; T; I Q* y& C& ~- Y
End If7 W( q/ k0 @* s w/ T" w
Next
( ^2 M# z; P5 v# cEnd If
. I5 A" q, o& a3 z9 E$ t! Y'ObjCircle1.Delete; ]8 `6 ?: Q. Y9 D% \
'ObjCircle2.Delete9 X3 m2 D, O4 N
End Function
8 |- i4 n! U) N' f5 b2 l7 A( ]! k
Sub trial()
% Y! X+ _' W' f! wDim A As Variant( K! ]2 i b7 O+ F$ A* S$ l. s3 C
Dim B As Variant
) I! z( Y# W6 vDim C As Variant0 |. }/ v% ]9 D# `
A = ThisDrawing.Utility.GetPoint(, "后支撑碗中心：" )3 T2 i. T. }! t' C) @( T6 @1 V" r
B = ThisDrawing.Utility.GetPoint(, "前摆杆上铰接点：" )
3 l- S6 ]. K, t* OC = GetFSupportCenter(A, B)
/ o7 J* M" M% m. {0 pMsgBox "前支撑碗中心坐标：" & C(0) & "," & C(1) & "," & C(2)- h7 {* G7 z8 a
End Sub |
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发表于 2008-12-6 16:38:29
发表于 2008-12-6 18:27:44