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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。
% I7 m) {0 l) g1 b( m 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？3 m. s) B) J1 ^& u1 w
代码如下：+ A& A. ^& x8 y: Q3 d) {: w5 I
Private Function GetFSupportCenter(BSupportCenter As Variant, FSwingBasePoint As Variant) As Variant" j" K$ @* k: W! Z( r+ G M
Dim Testlayer As AcadLayer. W% |- M& X G
Dim ObjCircle1 As AcadCircle '辅助圆
: F& A. v7 W1 }2 YDim ObjCircle2 As AcadCircle
3 |1 c. L5 p3 h Q9 j6 gDim SWingLength As Double
5 W: S( l) ^% q) h0 vDim SWingPitch As Double
4 w4 A: {/ |/ [8 x- c& K) ?Dim PT(0 To 2) As Double E# L0 n* a9 {: R& ?
Set Testlayer = ThisDrawing.Layers.Add("非显示层" ) '辅助线位于非显示层
x: R. @: }% b+ {& S qTestlayer.color = acRed4 E& Q8 \) j4 g
ThisDrawing.Application.ActiveDocument.ActiveLayer = Testlayer '激活图层
7 y- q e/ o" g8 r% U8 UTestlayer.LayerOn = True
) j+ B/ y& a6 ^& k5 j% u& t$ ASWingLength = 2607+ F- A7 o% g* ]* o1 q7 }! \( P
SWingPitch = 32508 e2 c7 J4 X& V+ ^/ r
# q' v1 J' o% V. x& i i7 a6 oSet ObjCircle1 = ThisDrawing.ModelSpace.AddCircle(FSwingBasePoint, SWingLength) '作辅助线
4 I4 U: S; W* d4 V# @ vSet ObjCircle2 = ThisDrawing.ModelSpace.AddCircle(BSupportCenter, SWingPitch)
- z [" M, {- s# y' O9 W
) ?+ T/ G: J5 g2 m9 ODim IntPoints As Variant" K% g- t( [0 q$ K
IntPoints = ObjCircle2.IntersectWith(ObjCircle1, acExtendNone) '获取交点并判断% \" f9 s T1 I. S5 r/ R. A/ Q
4 }% n- `% {4 ^! I9 [If VarType(IntPoints) = vbEmpty Then9 f E7 B6 ^2 G/ d4 s2 I
MsgBox "没有交点!"
: a% ^6 O1 q6 P8 o( [" L. l5 ^- `/ ^ kElseIf BSupportCenter(1) = FSwingBasePoint(1) Then
& I9 h: E3 Z, F# C# L For i = LBound(IntPoints) + 1 To UBound(IntPoints) Step 3
- E! Z) s9 L! D On Error Resume Next; M7 K% j, W2 J2 a
If IntPoints(i) < BSupportCenter(1) Then
, v$ y& m, M2 p; U& b. r3 C1 l+ I PT(0) = IntPoints(i - 1): PT(1) = IntPoints(i): PT(2) = IntPoints(i + 1)$ ?% h: G8 L6 F7 u: `9 R
GetFSupportCenter = PT '函数返回值8 d/ i8 V |: `7 w9 u0 X" c
End If' f. C3 X! } ^& z8 w
Next
( B; |0 k6 m- G [; tElse
, e4 k: v- v. W' U! tFor i = LBound(IntPoints) To UBound(IntPoints) Step 3+ f# a' {$ B8 z* p
On Error Resume Next* w2 i9 t- S. r s8 F F
If (IntPoints(i + 1) - FSwingBasePoint(1)) / (BSupportCenter(1) - FSwingBasePoint(1)) - (IntPoints(i) - FSwingBasePoint(0)) / (BSupportCenter(0) - FSwingBasePoint(0)) < 0 Then% F, X* T5 ]# C: L0 I: B
PT(0) = IntPoints(i): PT(1) = IntPoints(i + 1): PT(2) = IntPoints(i + 2)" Q9 p P9 B" `- S6 R
GetFSupportCenter = PT '函数返回值# i( Y6 A: k3 u I: Q) U
End If9 ?) d( F% a6 S, b8 \
Next
" L4 r4 T- c# BEnd If
X' u7 k. f' J# C5 \; Z'ObjCircle1.Delete
" h& z& O% {1 W# h: m9 z'ObjCircle2.Delete' \: E- \. l' {' Z1 I7 ^7 ~$ a
End Function
4 M! Q& r' u( C( C% }! j
9 W. C0 o* v8 A6 n8 \7 E/ nSub trial()- P4 N+ N8 N" m
Dim A As Variant% h; q% o g& [' K. f' i9 E: ]
Dim B As Variant) l( }+ j# U' U U& a2 g
Dim C As Variant
9 k9 W& K4 r6 \8 D8 V: MA = ThisDrawing.Utility.GetPoint(, "后支撑碗中心：" )
* p9 x6 S# }; o0 }; B: pB = ThisDrawing.Utility.GetPoint(, "前摆杆上铰接点：" )) m6 Y5 n' s- z4 P0 C" w$ T9 }
C = GetFSupportCenter(A, B)( V* u3 r0 U$ `' Z
MsgBox "前支撑碗中心坐标：" & C(0) & "," & C(1) & "," & C(2)! [3 ~; h0 I) p# N
End Sub |
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发表于 2008-12-6 16:38:29
发表于 2008-12-6 18:27:44