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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。
2 b$ ]; ~& i' h; I6 @4 s6 f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？
; s" G. i1 {5 s' F2 m* q2 l4 r代码如下：
5 E& p6 l, Z5 @6 P8 Z4 K% t7 c2 VPrivate Function GetFSupportCenter(BSupportCenter As Variant, FSwingBasePoint As Variant) As Variant
0 s$ B+ w v, GDim Testlayer As AcadLayer/ D1 [; K A+ o/ ?
Dim ObjCircle1 As AcadCircle '辅助圆; F1 Q4 ~1 c$ ~, H* q# q
Dim ObjCircle2 As AcadCircle; l0 E: c. N4 z5 f9 [
Dim SWingLength As Double
1 F. i5 r& P/ }5 l( {9 yDim SWingPitch As Double; ]# _/ L( ^3 Y
Dim PT(0 To 2) As Double
4 U8 s: t6 x4 H. Q$ S: ^3 S7 h. |Set Testlayer = ThisDrawing.Layers.Add("非显示层" ) '辅助线位于非显示层
" J; J' `5 X1 STestlayer.color = acRed
( B) {7 ^( Y- I: @+ a5 gThisDrawing.Application.ActiveDocument.ActiveLayer = Testlayer '激活图层
" w6 ]: Y, g6 d( K5 C6 G0 oTestlayer.LayerOn = True
8 R2 A; c( J% e0 p6 QSWingLength = 2607
! g3 O; f; ^' ^9 E3 a- QSWingPitch = 3250
6 D) A% `! K, Y4 F6 s* H$ Q4 N7 C' W( z& G6 V; u" z3 }4 {. ?
Set ObjCircle1 = ThisDrawing.ModelSpace.AddCircle(FSwingBasePoint, SWingLength) '作辅助线, v. G5 p9 m" @# D( w
Set ObjCircle2 = ThisDrawing.ModelSpace.AddCircle(BSupportCenter, SWingPitch)
3 V2 |% X2 o- u
* T6 M* ]9 x' q; {9 j! F( i, HDim IntPoints As Variant* f: n& T/ ^0 v* k
IntPoints = ObjCircle2.IntersectWith(ObjCircle1, acExtendNone) '获取交点并判断
0 O3 I1 b% n) w: k' X. U2 d) s
[. O. P- h+ gIf VarType(IntPoints) = vbEmpty Then! Q* X- {/ d$ a) Z
MsgBox "没有交点!"$ h( \9 p% l, c) j
ElseIf BSupportCenter(1) = FSwingBasePoint(1) Then
; _" i7 D: j: k, g' K For i = LBound(IntPoints) + 1 To UBound(IntPoints) Step 3
" F A$ N3 [7 ?4 D4 E' H On Error Resume Next' y2 x- H; O7 { _4 p
If IntPoints(i) < BSupportCenter(1) Then
; X& f. z& S3 Z1 l0 B3 ~ PT(0) = IntPoints(i - 1): PT(1) = IntPoints(i): PT(2) = IntPoints(i + 1)& U4 V/ P5 m* n9 t$ \9 w) @
GetFSupportCenter = PT '函数返回值& q' T6 z. i- d+ @7 L
End If- {" V5 @" {, |$ r% |
Next# K( d9 p* \5 O! l; J6 C
Else$ G8 }. j! [8 H6 s C' V
For i = LBound(IntPoints) To UBound(IntPoints) Step 3
7 j3 D! c1 |9 e3 V# Y8 K On Error Resume Next
/ }' C O O$ F. a If (IntPoints(i + 1) - FSwingBasePoint(1)) / (BSupportCenter(1) - FSwingBasePoint(1)) - (IntPoints(i) - FSwingBasePoint(0)) / (BSupportCenter(0) - FSwingBasePoint(0)) < 0 Then( }- e: }) [1 Y" ^2 b, X
PT(0) = IntPoints(i): PT(1) = IntPoints(i + 1): PT(2) = IntPoints(i + 2)- [" a7 f# r# k9 m8 N
GetFSupportCenter = PT '函数返回值
8 m; {4 _$ i- x) F! d7 N End If
* N! f4 F, g1 `/ A% }# jNext
. b/ v( _2 d) P. w8 t) YEnd If
3 w& d+ l x6 c7 Y* p) B'ObjCircle1.Delete( g1 s2 l$ ?9 Q+ u
'ObjCircle2.Delete
: |" n( a& i2 k+ GEnd Function
9 g: z5 L A1 r4 j8 R& ~. h) d/ |( n0 h$ L/ @8 u
Sub trial()
- h, L$ q9 z) A/ ^0 V1 F: ^7 `0 nDim A As Variant2 p7 g9 `& E$ i
Dim B As Variant( k2 l+ K1 @' U: h% b4 |
Dim C As Variant
P2 U' d+ p9 Y: w U4 pA = ThisDrawing.Utility.GetPoint(, "后支撑碗中心：" )
2 C: n% m0 a- H+ C" f! d4 ?B = ThisDrawing.Utility.GetPoint(, "前摆杆上铰接点：" )% T3 A/ x. ` Q; `5 [
C = GetFSupportCenter(A, B)
- `9 @: f/ H* L) l, J* B8 q# DMsgBox "前支撑碗中心坐标：" & C(0) & "," & C(1) & "," & C(2)# P0 Y7 F$ F v# i7 _! v8 W* {/ }
End Sub |
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发表于 2008-12-6 16:38:29
发表于 2008-12-6 18:27:44