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()
1 t% I9 l' U0 d3 ?" @$ o7 \Dim swApp As Object
% {/ w: {5 P* r( t1 K: P! Y# ?Dim Part As Object
Dim SelMgr As Object
1 h- }, z. K- M# \9 |Dim boolstatus As Boolean
+ m- ]! |- f# V3 vDim longstatus As Long, longwarnings As Long
Dim Feature As Object
Dim a As Double
Dim b As Double
+ f" e, H% y0 {' R+ v4 X  J, j% q2 j: ~9 @Dim c As Integer
Dim r1 As Integer
, B* ]: W/ E9 _* j; e; sDim r2 As Integer
& ]! i( v% U3 e7 I! m/ `& v; |Set swApp = Application.SldWorks
* Y" z2 }) y( n4 B! C4 V0 [& \$ ISet Part = swApp.ActiveDoc
a = CDbl(TextBox1.Text) / 1000
6 O# h9 K; U% U# a9 j6 sb = CDbl(TextBox2.Text) / 1000
c = CDbl(TextBox3.Text) / 1000
r1 = CDbl(TextBox4.Text) / 1000
r2 = CDbl(TextBox5.Text) / 1000
Set SelMgr = Part.SelectionManager
4 E( E* |4 T7 V' J4 tboolstatus = Part.Extension.SelectByID2("前视基准面", "PLANE", 0, 0, 0, False, 0, Nothing, 0)
. e3 @' d" O9 M( tPart.InsertSketch2 True
Part.ClearSelection2 True
3 b  e( A4 W% B" JPart.CreateLine2(0, 0, 0, a, 0, 0).ConstructionGeometry = True
Part.CreateCircleByRadius2 0, 0, 0, r1
& W4 V; v% q' c( b+ U5 d" tPart.ClearSelection2 True
Part.CreateCircleByRadius2 a, 0, 0, r1
! `/ O6 x* _* @6 P$ Z0 @! ]Part.ClearSelection2 True
/ R9 o  i* W% Q7 dPart.SetPickMode
Part.CreateLine2 Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0
  o1 i7 u& U" D8 h& S: d6 F, r. sPart.SetPickMode
Part.ClearSelection2 True
- ^2 W$ j6 j! G1 X& ^! C; _Part.CreateLine2 Sqr(r1 ^ 2 - (b / 2) ^ 2), -b / 2, 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), -b / 2, 0
4 Z. y! {3 S  \$ x9 bPart.SetPickMode
- t$ E0 R: |  c$ i& p% ~Part.ClearSelection2 True
Part.SetPickMode
1 Y% c8 q6 z6 R# Y; fboolstatus = 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
- _) x8 v/ n7 QPart.SetPickMode
. X) d/ y% u; W; O) H! @9 Qboolstatus = Part.Extension.SelectByID2("圆弧1", "SKETCHSEGMENT", 0#, 0#, 0#, False, 0, Nothing, 0)
2 P6 r- W8 \% t  L2 e! APart.SketchManager.SketchTrim 0, Sqr(r1 ^ 2 - (b / 2) ^ 2), -b / 2, 0
5 V, r, Z7 N% L# N/ t1 iPart.SetPickMode
7 y9 A6 u1 |6 Z6 Z. n1 Bboolstatus = 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
Part.SetPickMode
$ {0 |1 B6 n2 @) Aboolstatus = Part.Extension.SelectByID2("圆弧2", "SKETCHSEGMENT", 0#, 0#, 0#, False, 0, Nothing, 0)
: C" f/ r  Z4 O) SPart.SketchManager.SketchTrim 0, a - Sqr(r1 ^ 2 - (b / 2) ^ 2), b / 2, 0
Part.SketchManager.InsertSketch True
; U* l, W3 o: T. b6 Rboolstatus = Part.Extension.SelectByID2("草图1", "SKETCH", 0, 0, 0, False, 0, Nothing, 0)
2 }* C# t6 V* k' A! O5 J4 h6 x" ^, lPart.ShowNamedView2 "*上下二等角轴测", 8
Part.ClearSelection2 True
boolstatus = Part.Extension.SelectByID2("草图1", "SKETCH", 0, 0, 0, False, 0, Nothing, 0)
+ D) a/ |& ^" `6 \: IPart.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
. b) ~6 e8 G* z  h0 YPart.SelectionManager.EnableContourSelection = 0
) I+ ]' e7 x. X" [' @boolstatus = Part.Extension.SelectByID2("", "FACE", 3.123904942299E-04, -4.650735940004E-05, 0.01999999999987, False, 0, Nothing, 0)
Part.SketchManager.InsertSketch True
6 s2 Z0 R0 u9 J& r" W* A  aPart.ClearSelection2 True
- z! ?; z' V3 z6 p4 H+ tPart.CreateCircleByRadius2 0, 0, 0, r2
Part.ClearSelection2 True
Part.CreateCircleByRadius2 a, 0, 0, r2
Part.ClearSelection2 True
4 ]; _, A. k' I2 N2 uPart.SketchManager.InsertSketch True
, B6 p) ~/ V/ D) PPart.SketchManager.InsertSketch True
Part.ClearSelection2 True
" U9 ]4 W* z. pboolstatus = Part.Extension.SelectByID2("草图2", "SKETCH", 0, 0, 0, False, 0, Nothing, 0)
+ d6 Y; ~, ~: P0 U. Q% XPart.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
4 R; c2 c( `- s5 a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！

[ 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)
! ^* T* h: o- t2 X3 C7 G  Gr1 ^ 2 - (b / 2) ^ 2
# L- \1 A9 N" p. n- I; a1 x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)