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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。( w6 {$ z! N- n/ q7 |
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？% |3 T4 s2 \) g
代码如下：+ X5 j, m7 J3 L, }" F
Private Function GetFSupportCenter(BSupportCenter As Variant, FSwingBasePoint As Variant) As Variant; i; u! _, @. q5 W- s, {
Dim Testlayer As AcadLayer" J; N7 V1 l2 D" A3 ~. T. V' F
Dim ObjCircle1 As AcadCircle '辅助圆
; |2 e- M. N( U% y4 uDim ObjCircle2 As AcadCircle
% [9 g* \6 m0 M) ~- v( ZDim SWingLength As Double
l9 e; X7 E x+ W% FDim SWingPitch As Double
: U' }% N1 c% j8 xDim PT(0 To 2) As Double% ~* [) [, H' J: i1 N L8 Z5 Y3 W2 T8 b
Set Testlayer = ThisDrawing.Layers.Add("非显示层" ) '辅助线位于非显示层0 W; w v" A- k5 _* \% f
Testlayer.color = acRed8 v& `3 Z6 J. }: Q' g
ThisDrawing.Application.ActiveDocument.ActiveLayer = Testlayer '激活图层
! O4 i5 H" U. K* P* I8 Q* C1 _Testlayer.LayerOn = True7 B" Q8 b9 ~+ g! Z' F* N) I" S
SWingLength = 2607
& O* ~, t! }/ ]8 p) N9 Z2 m$ OSWingPitch = 3250+ |$ ?1 P+ ^. z9 Q% c
- {3 A% V' L4 ?% i( o6 MSet ObjCircle1 = ThisDrawing.ModelSpace.AddCircle(FSwingBasePoint, SWingLength) '作辅助线
' n7 K/ S% P/ E6 q7 W5 r* lSet ObjCircle2 = ThisDrawing.ModelSpace.AddCircle(BSupportCenter, SWingPitch)7 ]7 t( h6 Z0 }" c, N" w/ }5 P
4 V7 D# ^% x% x: F) Q
Dim IntPoints As Variant
$ v" s, q6 H3 I& x: U IntPoints = ObjCircle2.IntersectWith(ObjCircle1, acExtendNone) '获取交点并判断
0 B2 R7 }5 h) Y) j+ m2 ?, a6 O' P; N) o6 ]7 k
If VarType(IntPoints) = vbEmpty Then0 r% m! Z* Q+ P
MsgBox "没有交点!"
, C" u4 ]3 P- `! sElseIf BSupportCenter(1) = FSwingBasePoint(1) Then
) Q1 U8 b; `7 ` For i = LBound(IntPoints) + 1 To UBound(IntPoints) Step 3* Q/ S, ^% m# k
On Error Resume Next1 w# G2 S% Q" z) x
If IntPoints(i) < BSupportCenter(1) Then
$ Y( V& [! n$ Q: ?5 x- K [ PT(0) = IntPoints(i - 1): PT(1) = IntPoints(i): PT(2) = IntPoints(i + 1)
0 } b( y- U& X& L+ C, O GetFSupportCenter = PT '函数返回值# U9 z* u: M9 }
End If; F& n( R0 H7 w/ \% h0 z+ z
Next$ Q# ~6 F7 o& w6 H+ }
Else* \' d; g2 N Q# n, M* Q5 D
For i = LBound(IntPoints) To UBound(IntPoints) Step 3. k) \* r6 |2 M0 l% y7 v, C! h0 P
On Error Resume Next
u8 [. W$ z) _, ^ If (IntPoints(i + 1) - FSwingBasePoint(1)) / (BSupportCenter(1) - FSwingBasePoint(1)) - (IntPoints(i) - FSwingBasePoint(0)) / (BSupportCenter(0) - FSwingBasePoint(0)) < 0 Then1 K' C+ U0 h5 T4 o" S1 l. @
PT(0) = IntPoints(i): PT(1) = IntPoints(i + 1): PT(2) = IntPoints(i + 2)8 n& [5 i2 k3 E& K, H
GetFSupportCenter = PT '函数返回值
. ~. V/ g4 o h" ] End If4 {/ Y. y/ E0 H6 [ r
Next
9 k d2 K' k' i- F5 HEnd If
, ^3 g7 S$ J0 x'ObjCircle1.Delete6 _$ ]- H. B0 D4 ~7 K' [
'ObjCircle2.Delete1 N' w6 K' {+ y: Y0 u
End Function
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5 ?: J2 E4 g% B! J2 O% @8 I+ kSub trial()
, Z8 B6 n) S6 B( nDim A As Variant
8 k0 f8 |7 @1 ]# \4 w8 j q" hDim B As Variant7 }% @/ |4 W. w$ J& t
Dim C As Variant
# @2 J) e5 ^0 }7 xA = ThisDrawing.Utility.GetPoint(, "后支撑碗中心：" )
# H, G e9 j! n/ x% D) dB = ThisDrawing.Utility.GetPoint(, "前摆杆上铰接点：" )
6 ]) _6 b+ f) m$ Q5 iC = GetFSupportCenter(A, B)
+ B9 \: ^: r' f7 f# fMsgBox "前支撑碗中心坐标：" & C(0) & "," & C(1) & "," & C(2)
% ?6 T$ w3 ~/ f: CEnd Sub |
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发表于 2008-12-6 16:38:29
发表于 2008-12-6 18:27:44