Developer: RhinoScript
Summary: How to read a point file and create an interpolated curve.

The following RhinoScript demonstrates how to read a text file containing point coordinates and create an interpolated curve from the points. See the RhinoScript help file for details on running scripts.

 Option Explicit
 
 Sub ImportInterpCrv()
 
   Dim strFilter, strFileName
   strFilter = "Text File (*.txt)|*.txt|All Files (*.*)|*.*|"
   strFileName = Rhino.OpenFileName("Open Point File", strFilter)
   If IsNull(strFileName) Then Exit Sub
 
   Dim objFSO, objFile
   Set objFSO = CreateObject("Scripting.FileSystemObject")
 
   On Error Resume Next
   Set objFile = objFSO.OpenTextFile(strFileName, 1)
   If Err Then
     MsgBox Err.Description
     Exit Sub
   End If
 
   Dim strLine, arrPt, arrPoints(), nCount
   nCount = 0  
   Do While objFile.AtEndOfStream <> True
     strLine = objFile.ReadLine
     If Not IsNull(strLine) Then
       strLine = Replace(strLine, Chr(34), , 1)
       arrPt = Rhino.Str2Pt(strLine)
       If IsArray(arrPoint) Then
         ReDim Preserve arrPoints(nCount)
         arrPoints(nCount) = arrPt
         nCount = nCount + 1
       End If
     End If
   Loop
 
   If IsArray(arrPoints) Then
     Rhino.AddInterpCurveEx arrPoints
   End If
 
   objFile.Close
 
   Set objFile = Nothing
   Set objFSO = Nothing
 
 End Sub