在二次开发中应用的公式超出范围？

nanyuchun

我把录制的程序改了下，如下：
Private Sub CommandButton1_Click()
Dim swApp As Object
0 t7 s* K( k5 V& i* s. Q: g- Y0 yDim Part As Object
6 s3 l! Q3 X3 N0 X3 y% jDim SelMgr As Object
Dim boolstatus As Boolean
" j' t. _, d  j+ M7 B% R: TDim longstatus As Long, longwarnings As Long
% m# o% W1 I) O: m7 P! M$ |Dim Feature As Object
Dim a As Double
Dim b As Double
0 s$ J) O6 y1 G! Z  _Dim c As Integer
( D6 A- f- ]: H5 \Dim r1 As Integer
+ o7 T* _% V0 V& K, }0 cDim r2 As Integer
Set swApp = Application.SldWorks
. {- i% _0 h: ^$ QSet Part = swApp.ActiveDoc
a = CDbl(TextBox1.Text) / 1000
b = CDbl(TextBox2.Text) / 1000
; Y) z, Z2 U1 g7 c  W1 \$ B6 Ac = CDbl(TextBox3.Text) / 1000
( K5 @' F! n. C  a3 D4 Rr1 = CDbl(TextBox4.Text) / 1000
9 `: d; k& e$ w' ]r2 = CDbl(TextBox5.Text) / 1000
Set SelMgr = Part.SelectionManager
# ?- Y9 \9 v. y/ u2 ]boolstatus = Part.Extension.SelectByID2("前视基准面", "PLANE", 0, 0, 0, False, 0, Nothing, 0)
$ m! b6 |4 a% h1 ]Part.InsertSketch2 True
Part.ClearSelection2 True
Part.CreateLine2(0, 0, 0, a, 0, 0).ConstructionGeometry = True
) ^5 m( V- o# r/ m% I8 O. LPart.CreateCircleByRadius2 0, 0, 0, r1
Part.ClearSelection2 True
9 q5 r0 A! Y. Q, u$ j& CPart.CreateCircleByRadius2 a, 0, 0, r1
/ {4 F/ ^) s  J$ WPart.ClearSelection2 True
9 t) C4 J+ v7 Y' K; rPart.SetPickMode
Part.CreateLine2 Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0
Part.SetPickMode
' _. |* h! F2 z4 }/ MPart.ClearSelection2 True
Part.CreateLine2 Sqr(r1 ^ 2 - (b / 2) ^ 2), -b / 2, 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), -b / 2, 0
' }8 @1 z  n+ K. TPart.SetPickMode
Part.ClearSelection2 True
9 }7 F# H* b7 i  P$ n; n! o1 F6 vPart.SetPickMode
9 I5 P6 C$ v; p- ~  @* ~( {' r% [boolstatus = Part.Extension.SelectByID2("圆弧1", "SKETCHSEGMENT", 0#, 0#, 0#, False, 0, Nothing, 0)
. \/ j; W6 Z+ t8 ]Part.SketchManager.SketchTrim 0, Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0
, P7 ^. Q) _+ g7 g  y& Y! @3 |Part.SetPickMode
3 D0 B5 p, l. D( @' P0 \boolstatus = Part.Extension.SelectByID2("圆弧1", "SKETCHSEGMENT", 0#, 0#, 0#, False, 0, Nothing, 0)
Part.SketchManager.SketchTrim 0, Sqr(r1 ^ 2 - (b / 2) ^ 2), -b / 2, 0
) y: C% j& q, _8 V: nPart.SetPickMode
boolstatus = Part.Extension.SelectByID2("圆弧2", "SKETCHSEGMENT", 0#, 0#, 0#, False, 0, Nothing, 0)
Part.SketchManager.SketchTrim 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), -b / 2, 0
, M+ t/ z8 t& N! vPart.SetPickMode
& d# \) Q8 }% b: ]% I5 b. u; {3 Jboolstatus = Part.Extension.SelectByID2("圆弧2", "SKETCHSEGMENT", 0#, 0#, 0#, False, 0, Nothing, 0)
( L% e  z5 M* g, c: aPart.SketchManager.SketchTrim 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0
  z2 I( c0 `) G! k( J  ZPart.SketchManager.InsertSketch True
! w0 f* V' P5 `* J8 v2 T( Zboolstatus = Part.Extension.SelectByID2("草图1", "SKETCH", 0, 0, 0, False, 0, Nothing, 0)
Part.ShowNamedView2 "*上下二等角轴测", 8
Part.ClearSelection2 True
, ]: |" q: F# J* Iboolstatus = Part.Extension.SelectByID2("草图1", "SKETCH", 0, 0, 0, False, 0, Nothing, 0)
Part.FeatureManager.FeatureExtrusion2 True, False, False, 0, 0, c, 0, False, False, False, False, 0.01745329251994, 0.01745329251994, False, False, False, False, 1, 1, 1, 0, 0, False
Part.SelectionManager.EnableContourSelection = 0
boolstatus = Part.Extension.SelectByID2("", "FACE", 3.123904942299E-04, -4.650735940004E-05, 0.01999999999987, False, 0, Nothing, 0)
( ?/ {* y! V# V" a# Q  ePart.SketchManager.InsertSketch True
* [  E7 }$ x$ A2 }0 ePart.ClearSelection2 True
, q9 O5 t# P& t7 _4 c/ yPart.CreateCircleByRadius2 0, 0, 0, r2
9 t: |+ r5 i  o  C. wPart.ClearSelection2 True
7 }+ U6 u; k* F9 R0 }' X* \( X/ Z6 UPart.CreateCircleByRadius2 a, 0, 0, r2
$ G! C1 V) }: \7 @* OPart.ClearSelection2 True
Part.SketchManager.InsertSketch True
* R8 {7 V% R0 e$ PPart.SketchManager.InsertSketch True
) g* g  \- I1 oPart.ClearSelection2 True
boolstatus = Part.Extension.SelectByID2("草图2", "SKETCH", 0, 0, 0, False, 0, Nothing, 0)
6 G0 Z* F" }& N4 PPart.FeatureManager.FeatureCut True, False, False, 1, 0, c, 0.02, False, False, False, False, 0.01745329251994, 0.01745329251994, False, False, False, False, 0, 1, 1
Part.SelectionManager.EnableContourSelection = 0
End Sub
; t; Y5 {6 s( p1 K) v运行到这句：Part.CreateLine2 Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0时，报错，说数值超过范围或函数调用有误，这是什么原因呢，真心求教,谢谢！
0 Y, _; m! e7 r4 X+ Z
' T+ _% _- s9 }) V[ 本帖最后由 nanyuchun 于 2009-5-10 09:19 编辑 ]

nanyuchun

自己坐沙发等回答。。。

nanyuchun

怎么就没人回答呢？

飞天鸟

最好先用一个变量储存上述公式的运算结果, 然后再调用函数. 这样, 调试时可以比较容易找到问题.

少来我可

Sqr(r1 ^ 2 - (b / 2) ^ 2)
r1 ^ 2 - (b / 2) ^ 2
可能这里出现了负数，你给负数求平方根，就出错了
你可以加一句看看：MsgBox (r1 ^ 2 - (b / 2) ^ 2)