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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。+ f" T2 f' n P$ b+ c
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？
, q" s" `6 G$ |% a3 |- y+ j代码如下：
& k# \/ [7 d; B7 t! ]Private Function GetFSupportCenter(BSupportCenter As Variant, FSwingBasePoint As Variant) As Variant: |2 y: \5 G: ?; g
Dim Testlayer As AcadLayer
0 a( v! z1 f) i0 r1 KDim ObjCircle1 As AcadCircle '辅助圆
8 o6 K: |: N5 K! [; WDim ObjCircle2 As AcadCircle K5 k1 B W* h0 a! Y
Dim SWingLength As Double$ M7 U$ K" w: ~1 t
Dim SWingPitch As Double
/ V$ X$ K% P, Z N1 |Dim PT(0 To 2) As Double
. G' R3 t: d5 {( VSet Testlayer = ThisDrawing.Layers.Add("非显示层" ) '辅助线位于非显示层0 p+ t) T1 V; w- T6 H$ t
Testlayer.color = acRed
* D# f# ?: s4 m9 |ThisDrawing.Application.ActiveDocument.ActiveLayer = Testlayer '激活图层
! h' _/ y1 l; m+ v4 I4 \" z+ H/ pTestlayer.LayerOn = True( V$ }: C8 \( n3 t3 O. O0 N
SWingLength = 2607, } D3 _! A2 ? s' v1 H n& Y! H
SWingPitch = 3250+ p+ U: r, k7 {" C+ t
( M4 T( y* a# T) v2 \5 _7 Q5 @
Set ObjCircle1 = ThisDrawing.ModelSpace.AddCircle(FSwingBasePoint, SWingLength) '作辅助线
# r. @& D* x1 s2 t5 u# s2 GSet ObjCircle2 = ThisDrawing.ModelSpace.AddCircle(BSupportCenter, SWingPitch)' I" @) S$ h* v2 z3 h
+ B& ?3 Y* Z. O: e8 o3 n
Dim IntPoints As Variant# z; n7 i5 f7 I2 F- H
IntPoints = ObjCircle2.IntersectWith(ObjCircle1, acExtendNone) '获取交点并判断
: S g8 a* y: @4 T# P
( [1 {' c& ?; s u# W) q. kIf VarType(IntPoints) = vbEmpty Then
, P R3 X+ C1 f; _: u: cMsgBox "没有交点!"# s, r2 l. E6 B
ElseIf BSupportCenter(1) = FSwingBasePoint(1) Then" T9 l7 W# w6 e5 J( ?+ H
For i = LBound(IntPoints) + 1 To UBound(IntPoints) Step 3
; W- J, @! Y) |8 A4 B On Error Resume Next8 S# z. S( t' M+ f' W
If IntPoints(i) < BSupportCenter(1) Then% V" g3 D; [8 Z2 g/ I
PT(0) = IntPoints(i - 1): PT(1) = IntPoints(i): PT(2) = IntPoints(i + 1)& u! u5 b7 T6 M& l4 Y+ u: e% P. J
GetFSupportCenter = PT '函数返回值, s7 O3 x2 B6 c
End If$ \$ {/ L1 {' v2 D' }. _( o& b
Next
3 r0 G- M8 `" X9 O. D @1 c+ ZElse
; { u$ t8 f" V* Q& u3 i% r) p& rFor i = LBound(IntPoints) To UBound(IntPoints) Step 3
& j- |. [0 a1 ~! O S! ?5 N On Error Resume Next
: t. | O: X' F( N/ \9 Z5 d, Z If (IntPoints(i + 1) - FSwingBasePoint(1)) / (BSupportCenter(1) - FSwingBasePoint(1)) - (IntPoints(i) - FSwingBasePoint(0)) / (BSupportCenter(0) - FSwingBasePoint(0)) < 0 Then
) I/ P% n6 i f, T, @2 H* G' j PT(0) = IntPoints(i): PT(1) = IntPoints(i + 1): PT(2) = IntPoints(i + 2)) \3 s n% j0 b9 Q( E" S
GetFSupportCenter = PT '函数返回值
1 f& k0 _) Z" G. {3 B End If# m1 [9 v/ _" M$ s
Next' W. T/ ?- a7 z# y7 \+ g* r+ l6 }
End If3 l3 r7 _3 D, i1 `0 @
'ObjCircle1.Delete; }: Z4 F4 _/ L; F' I' A# k
'ObjCircle2.Delete
3 l3 R9 d7 e6 aEnd Function \5 W, @6 w& W4 k8 g' u* V
3 o3 s H5 ~9 K$ C1 H
Sub trial()
* ]1 U$ o0 q @Dim A As Variant3 v$ t$ Z& \6 }) H8 Q, M: q" G
Dim B As Variant4 K. v* R8 F( m, u
Dim C As Variant5 A5 I! E% G5 G7 d3 z8 L: [
A = ThisDrawing.Utility.GetPoint(, "后支撑碗中心：" )# k; r A' E! s V+ P
B = ThisDrawing.Utility.GetPoint(, "前摆杆上铰接点：" )
- g" p% X- w+ UC = GetFSupportCenter(A, B)
4 X3 I) i, F j% G B" j6 a2 kMsgBox "前支撑碗中心坐标：" & C(0) & "," & C(1) & "," & C(2)7 c" {: r6 H% E. \- S1 u
End Sub |
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发表于 2008-12-6 16:38:29
发表于 2008-12-6 18:27:44