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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。
5 E8 p1 a& U4 F0 l. z" X1 C& k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？+ w7 _$ ]+ e" r& K! d4 ?
代码如下：
$ y9 F) S! b8 HPrivate Function GetFSupportCenter(BSupportCenter As Variant, FSwingBasePoint As Variant) As Variant
: `( ]8 d" |; q+ C& w% `9 g1 ^Dim Testlayer As AcadLayer
) g8 h6 G" o0 a% |. h pDim ObjCircle1 As AcadCircle '辅助圆
4 w2 [( p4 }" t& T9 d7 [+ D$ g( bDim ObjCircle2 As AcadCircle
2 I9 v% A! a( A. I" ~: B0 \Dim SWingLength As Double2 W" D' w# a: ]+ P
Dim SWingPitch As Double
( J* R6 t# |6 w! ?: S2 cDim PT(0 To 2) As Double
6 L1 ]$ Y0 B* J8 T* {' b; sSet Testlayer = ThisDrawing.Layers.Add("非显示层" ) '辅助线位于非显示层! r3 Z" A) E) w
Testlayer.color = acRed9 e s3 y u" Q. O+ J. i5 x7 l1 u
ThisDrawing.Application.ActiveDocument.ActiveLayer = Testlayer '激活图层 c! `$ t$ L' H0 q% j5 g
Testlayer.LayerOn = True
, ^9 Z9 m% g% BSWingLength = 2607
) Q$ G8 T( F' s! QSWingPitch = 3250
( _7 x; X, ?" K, e4 o( f6 c* [/ W! I0 s/ _7 ^6 e9 m
Set ObjCircle1 = ThisDrawing.ModelSpace.AddCircle(FSwingBasePoint, SWingLength) '作辅助线0 f9 p9 K |: [% c' G& n- Y
Set ObjCircle2 = ThisDrawing.ModelSpace.AddCircle(BSupportCenter, SWingPitch)
: n$ L$ M' K7 x4 c9 K* i( d' T# F1 \, D
Dim IntPoints As Variant) u3 P: a) G, ~3 y; \9 \
IntPoints = ObjCircle2.IntersectWith(ObjCircle1, acExtendNone) '获取交点并判断
, c0 H8 n. v; V( O3 l
8 o2 g5 ?$ U0 c" B" B. t. Z# e2 FIf VarType(IntPoints) = vbEmpty Then
$ M1 Z7 O! h- ?* X) pMsgBox "没有交点!"1 K. x: u# z7 b$ T1 W
ElseIf BSupportCenter(1) = FSwingBasePoint(1) Then
$ H0 j0 e8 G+ T+ t) N3 t9 i For i = LBound(IntPoints) + 1 To UBound(IntPoints) Step 3/ \+ i7 s" N+ Z5 W1 l [
On Error Resume Next
3 R# ?7 ]' {# `# q P$ X3 d If IntPoints(i) < BSupportCenter(1) Then1 J2 k' `$ B7 ?4 W* |
PT(0) = IntPoints(i - 1): PT(1) = IntPoints(i): PT(2) = IntPoints(i + 1)$ I% F% K, O5 T3 X0 _6 |* |
GetFSupportCenter = PT '函数返回值
' n. G" S* P' d7 Y) v% q. ^2 D g End If+ n% @5 K0 l- o2 r0 U6 {: I
Next
1 V) K* {! F: Q3 `3 u" K" {& e0 X MElse; E9 \0 ~5 m9 ]
For i = LBound(IntPoints) To UBound(IntPoints) Step 37 E( b6 O& G8 e( |" C% p
On Error Resume Next4 F) ~ l$ X3 {1 U
If (IntPoints(i + 1) - FSwingBasePoint(1)) / (BSupportCenter(1) - FSwingBasePoint(1)) - (IntPoints(i) - FSwingBasePoint(0)) / (BSupportCenter(0) - FSwingBasePoint(0)) < 0 Then
& D) v @; X+ o3 X6 u3 _- s* j PT(0) = IntPoints(i): PT(1) = IntPoints(i + 1): PT(2) = IntPoints(i + 2)
" Y4 \( F: P6 s" b GetFSupportCenter = PT '函数返回值
8 j, m$ T/ h: c2 S End If$ i. Y& \0 T5 |) l U
Next
" k g5 V. a; d. R) }% g% e1 r: QEnd If, Z- h* ^6 J6 l% q5 P* d" z
'ObjCircle1.Delete
. j2 o+ ^2 _4 E$ B2 r4 ?* T A'ObjCircle2.Delete
1 X% M& w9 h# Y2 c8 C6 \1 IEnd Function
% W; r3 E+ x, W# _
" e6 w. J9 @; v% y% ?Sub trial()
, Q# H! k! w# e7 O+ A1 UDim A As Variant
% ?) V4 F* O: B$ V, N/ C: hDim B As Variant, ?+ k8 ^6 n5 J' O- r% Z
Dim C As Variant0 R7 W( L Y+ `- B6 |
A = ThisDrawing.Utility.GetPoint(, "后支撑碗中心：" )' m0 i# m0 W/ {% E* X
B = ThisDrawing.Utility.GetPoint(, "前摆杆上铰接点：" )
# J r3 x7 P+ A! X' A/ v1 r MC = GetFSupportCenter(A, B)
" K( Q. q0 {4 j* y3 x' r2 LMsgBox "前支撑碗中心坐标：" & C(0) & "," & C(1) & "," & C(2)
) A" ?3 M3 V7 _2 |End Sub |
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发表于 2008-12-6 16:38:29
发表于 2008-12-6 18:27:44