THE PROVING GROUND

GRASSHOPPER	REVIT

While often times sufficient, I sometimes find the standard means of Importing/Exporting model information using file formats to be quite cumbersome and limiting… especially in the case of Revit where it is next to impossible to modify or build from linked/imported files

Below is a basic example of streaming a list of XYZ coordinates from Grasshopper into a *csv file and then using that file to create reference points in a Revit conceptual mass… A custom script was written using the Revit API to read the CSV file and make the points.

WHAT you will need

• Revit 2010 and familiarity with using the API
• Grasshopper for Rhino

The Code

Here is the Revit API code (in VB.NET) for reading the *.csv file.

Dim XYZfile As String = "insert file path here"

If File.Exists(XYZfile) Then

Dim FileReadXYZ As New StreamReader(XYZfile)

Do While FileReadXYZ.Peek <> -1
   Dim XYZLine As String = FileReadXYZ.ReadLine()
   Dim XYZData As String() = XYZLine.Split(",")
   Dim XYZ As Autodesk.Revit.Geometry.XYZ
   Dim RefPt As Autodesk.Revit.Elements.ReferencePoint

   XYZ = revit_app.Create.NewXYZ(Convert.ToDouble(XYZData(0)),   Convert.ToDouble(XYZData(1)), Convert.ToDouble(XYZData(2)))
   RefPt = revit_doc.FamilyCreate.NewReferencePoint(XYZ)
Loop

End If