Hi I am new to Civil 3D API. Now I am trying to use some of the Civil 3D command with python inside Revit Dynamo or Rhino.Inside Grasshopper. I have somehow established a connection to the Civil 3D active document inside Revit Dynamo or grasshopper. However when I get to use this command Alignment…

Hi @Josh.Wang , I don’t have much experience with Grasshopper, but I can help with the Civil 3D side. Are you able to get the alignment names correctly? In other words, is it just that particular method that isn’t working? Also, I’m pretty sure for that method you need to pass the easting and north…

Hi Never tried it before Inside the Revit program Do you use this method to connect? You can try this method in the link [image] Connecting Civil 3D using python node inside Dynamo Hi all, I have used below python code to connect the current running instance of Civil 3D application t…

Hi @zachri.jensen Zachri Thanks for your speedy reply. I guess it’s more of a python syntax issue as i am not entirely sure how to pass reference objects onto a method to get updated values for those objects with python. For your question, i can get the alignment names correctly and the starting…

Hi @hosneyalaa Thanks for sharing. I am indeed using this method to establish the connection. Just need to update the m_sAcadProdID and m_sAeccAppProgId to corresponding Civil3D version, then should be able to connect.

You should be able to just do something like this: easting, northing = align.PointLocation(station, elevation, 0, 0) Then use easting and northing for whatever you need after that. Also note that the method throws a PointNotOnEntityException when the station is outside the alignment’s station rang…

Thanks again, @zachri.jensen I have tried this method using the .Net API inside Civil 3D Dynamo python scriptor and it worked. However, when I tried that in the Dynamo/Grasshopper of Revit, the interpreter just returned a error message. After checking the type of the alignment object, it indicated…

OK nevermind, I thought maybe the method signature was different in the COM API but it looks the same. Now that I see the error a little clearer, it looks like oAeccDb.AlignmentsSiteless is none?

I don’t have much experience with Grasshopper, but it looks like maybe it uses IronPython? This might help: Providing Arguments for By-Reference Parameters This guide discusses calling methods with by-ref parameters with IronPython.

Try align.PointLocation(station, elevation,easting , northing) Points =list (easting , northing)

How to use Civil 3D API command Alignment.PointLocation(station, offset, easting, northing) with python

Civil 3D

mzjensen October 20, 2022, 1:03pm 8

Oh wow, I don’t know how I overlooked that
Yes, COM is being used in this case since we are outside of AutoCAD. I’ll try to share some more info later this morning.

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How to use Civil 3D API command Alignment.PointLocation(station, offset, easting, northing) with python

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