碰到一个问题，不解决不爽

问题的要素

随机生成一些长度、直径、位置、方向都不同的圆柱体;

数据文件需要是solid model格式，以便能导入到Fluent/ANSYS/Abaqus之类的软件中进行网格化和有限元或有限体积分析。

当前状态

已经解决。





解决了文件的生成和格式转换，但是要生成网格和进行分析，类似问题，从算法上的难度实际上仍然很大。可能需要巨大的内存和计算量。

两两不相交

进一步

把计算好的点放在TXT文件中用VBA读入，而后显示出来？

http://www.vbaexpress.com/forum/showthread.php?18957-Solved-VBA-and-AutoCAD-reading-points-from-a-txt-file

Public Sub DrawPointsFromTextFile()
Dim fd As Long
Dim sline As String
Dim ar As Variant
fd = FreeFile
Open "C:\Temp\Coordinates.txt" For Input Access Read Shared As fd
Do Until EOF(fd)
Line Input #fd, sline
ar = Split(sline, ",")
ReDim pt(UBound(ar)) As Double
Dim i As Integer
For i = 0 To UBound(ar)
pt(i) = CDbl(ar(i))
Next i
ThisDrawing.ModelSpace.AddPoint pt
Loop
Close fd
End Sub

来自

http://www.vbaexpress.com/forum/showthread.php?2647-Solved-Text-file-to-drawing

Sub DrawFromTxt()
Dim intFile As Integer
Dim mPoints
Dim HldPoints() As String
Dim LinPlace() As String
Dim MyString As String
Dim OutArr As Variant
Dim OutPt(0 To 2) As Double
Dim OutPtA(0 To 2) As Double
Dim Lend As Integer
Dim LStart As Integerm
Dim pointObj As AcadPoint
Dim lineObj As AcadLine
Dim I As Integer
ReDim HldPoints(0)
ReDim LinPlace(0)
intFile = FreeFile
Open "C:\Acad\file.txt" For Input As intFile
While Not EOF(intFile)
Line Input #intFile, MyString
If InStr(1, MyString, " !Define key points ") > 0 Or _
InStr(1, MyString, "! Define Keypoints") > 0 Then
Line Input #intFile, MyString
While InStr(1, MyString, "Keypoints") = 0
If Left$(MyString, 1) = "K" Then
ReDim Preserve HldPoints(UBound(HldPoints) + 1)
HldPoints(UBound(HldPoints)) = Right(MyString, _
Len(MyString) - InStr(3, MyString, ","))
End If
Line Input #intFile, MyString
Wend
End If
If InStr(1, MyString, " !Define line ") > 0 Or InStr(1, _
MyString, "! Define Lines Linking") > 0 Then
Line Input #intFile, MyString
While InStr(1, MyString, "! element definition") = 0 And _
InStr(1, MyString, " !Element Definition") = 0
If Left$(MyString, 1) = "L" Then
ReDim Preserve LinPlace(UBound(LinPlace) + 1)
LinPlace(UBound(LinPlace)) = Right$(MyString, Len(MyString) - 2)
End If
If Not EOF(intFile) Then
Line Input #intFile, MyString
Else
MyString = "! element definition"
End If
Wend
End If
Wend
Close (intFile)
'i have the points
For I = 1 To UBound(HldPoints)
OutArr = Split(HldPoints(I), ",")
OutPt(0) = Val(OutArr(0))
OutPt(1) = Val(OutArr(1))
OutPt(2) = 0
Set pointObj = ThisDrawing.ModelSpace.AddPoint(OutPt)
pointObj.Color = acCyan
ThisDrawing.Regen acActiveViewport
Next
For I = 1 To UBound(LinPlace)
OutArr = Split(LinPlace(I), ",")
LStart = Val(OutArr(0))
Lend = Val(OutArr(1))
OutArr = Split(HldPoints(LStart), ",")
OutPt(0) = Val(OutArr(0))
OutPt(1) = Val(OutArr(1))
OutPt(2) = 0
OutArr = Split(HldPoints(Lend), ",")
OutPtA(0) = Val(OutArr(0))
OutPtA(1) = Val(OutArr(1))
OutPtA(2) = 0
Set lineObj = ThisDrawing.ModelSpace.AddLine(OutPt, OutPtA)
lineObj.Color = acCyan
ThisDrawing.Regen acActiveViewport
Next
End Sub