Developer: RhinoScript
Summary: Demonstrates how to mark points on a line using RhinoScript.

I frequently use lines for relative measuring and splitting. But, I always end up deleting the original line. So, what I would like is a tool where I could “draw” a line but just add the line's starting, mid, and ending points, not the line, to Rhino. Can this be scripted?

The following sample script should be useful to you.

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' MarkLine.rvb -- March 2010
' If this code works, it was written by Dale Fugier.
' If not, I don't know who wrote it.
' Works with Rhino 4.0.
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Sub MarkLine()
  Dim arrLast
  Call Rhino.Command("_Line _Pause _Pause")
  If (Rhino.LastCommandResult() = 0) Then
    Call Rhino.EnableRedraw(False)
    arrLast = Rhino.LastCreatedObjects()
    If IsArray(arrLast) Then
      Call Rhino.AddPoint(Rhino.CurveStartPoint(arrLast(0)))
      Call Rhino.AddPoint(Rhino.CurveMidPoint(arrLast(0)))
      Call Rhino.AddPoint(Rhino.CurveEndPoint(arrLast(0)))
      Call Rhino.DeleteObjects(arrLast)
    End If
    Call Rhino.EnableRedraw(True)
  End If
End Sub
 
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Call Rhino.AddStartupScript(Rhino.LastLoadedScriptFile)
Call Rhino.AddAlias("MarkLine", "_NoEcho _-RunScript (MarkLine)")