请各位帮忙查我程序中的一点小错误

wt_liub 发表于 2005-1-24 11:03:00

Sub 拟合求视速度1()

Dim n As Integer, vp As Integer, i As Integer, k As Integer

Dim x(1 To 2000) As Double

Dim y(1 To 2000) As Double

Dim da As Double, db As Double, a00 As Double, a01 As Double, a10 As Double

Dim a11 As Double, c0 As Double, c1 As Double, f0 As Double, fn As Double, height As Double

Dim lineObj As AcadLine

Dim textString As String

Dim startPoint(0 To 2) As Double

Dim endPoint(0 To 2) As Double

Dim sset As AcadSelectionSet

Dim pline As AcadLWPolyline

 <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

ThisDrawing.Utility.Prompt "请选择要拟合的曲线："

Set sset = ThisDrawing.SelectionSets.Add("SS1")

sset.SelectOnScreen

Set pline = sset.Item(0)

Dim retCoord As Variant

retCoord = pline.Coordinates

pline.Delete

 i = 1

 k = 0

 Do While i <= 24

 x(i) = retCoord(k)

 y(i) = retCoord(k + 1)

 i = i + 1

 k = k + 3

 Loop

 

n = 24

a00 = n

a01 = 0#

For i = 1 To n

 a01 = a01 + x(i)

Next

a10 = a01

a11 = 0

For i = 1 To n

 a11 = a11 + x(i) * x(i)

Next

c0 = 0

For i = 1 To n

 c0 = c0 + y(i)

Next

c1 = 0

For i = 1 To n

 c1 = c1 + x(i) * y(i)

Next

db = (c0 * a10 - c1 * a00) / (a01 * a10 - a00 * a11)

da = (c0 * a11 - c1 * a01) / (a11 * a00 - a01 * a10)

f0 = da + db * x(1)

fn = da + db * x(n)

startPoint(0) = x(1): startPoint(1) = f0: startPoint(2) = 0#

endPoint(0) = x(n): endPoint(1) = fn: endPoint(2) = 0#

Set lineObj = ThisDrawing.ModelSpace.AddLine(startPoint, endPoint)

height = 4

vp = 1000 / db

textString = "vp" & "=" & vp

Set blockObj = ThisDrawing.ModelSpace.AddText(textString, endPoint, height)

End Sub





在给x(i),y(i)赋值时可能“Coordinates”属性搞错了，请各位师父改一下！

cobalt 发表于 2005-1-24 11:57:00

AutoCAD上的帮助文件对坐标值是这么说的： Coordinates

Variant (array of doubles); read-write The array of points.

LightweightPolyline objects: The variant is an array of 2D points in OCS.

Polyline objects: The variant is an array of 3D points: the X and Y coordinates are in OCS; the Z coordinate is ignored.

All other objects: The variant is an array of 3D points in WCS. 你定义了Dim pline As AcadLWPolyline，所以pline.Coordinates返回的是两维数据（XY坐标值）的列表。

wt_liub 发表于 2005-1-25 11:00:00

谢谢楼上的朋友，已搞定！

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请各位帮忙查我程序中的一点小错误