Does anyone know if it is possible to join geometries in a Family Document with Revit API?
I have hundreds of forms created between two profiles and I would like to join them in a specific order that I will set previously. Now I am just testing the workflow for two inputs only (elementA, elementB).
I have tested several nodes from different packages so far; Hot Gear, Clockwork… and not only packages but also the OOTB Dynamo node called Element.JoinGeometry and my own Python script. For the OOTB node and my Python node, a warning shows up saying “Warning: Element.JoinGeometry operation failed. document is not a project document.”. Therefore, I assume that the JoinGeometry method can only be used in a Revit project (.rvt) file with Revit API instead of a Revit family document (.rfa).
So, is there any chance I can use the join geometry button in the Revit family document to join forms created from lofting two profiles? If I try to join two consecutive forms in the Revit family environment the software allows me to do it but as I have hundreds of forms these handy tasks are impossible to carry out.
I looked for any Class in the Revit API related to the “Form” geometries and within that drop down I could see that there are many Methods but none of them make reference to any “JoinForms” functionality.
Is that method supposed to work in a Family Document (.rfa)? Bear in mind that I have all my forms in a Family Document (.rfa) instead of in a Project Document (.rvt).
Moreover, I am getting the following error from my Python script and I cannot find any issue in the spelling of the libraries or in line 36
I highlighted the inputs with watch nodes as you can see in the following image. I have also converted the inputs into .NET lists (I think I did ok as I copied it the lines from one reply marked as the solution in the forum) and lastly, I inserted the .doc.CombineElements.
In this case the error message clues you into your next step. You’re feeding it two lists, but it want an object from the CombinableElementArray class.
Which should be called as variableNameHere = CombinableElementArray().
Now we need to add your combinable elements to the array. Checking for methods of the CombinableElementArray class, and we find this: Append Method, which allows appending combinable elements to the array. So since we have a list of items we’d want to iterate over so that all the elements are in the array, we either need a for loop or to utilize some list comprehension. Personally I prefer the list comprehension method, which goes something like this:
initialElementsList = [A,B]
[ variableNameHere.Append(i) for i in initialElementsList ]
And now that we have our combinable element array object, we can feed that into the combine elements method and see if that solves this for us. doc.CombineElements(variableNameHere)
Now I am going to test it for each component of my road (subilists).
As you can see in the following screenshot, within each sublist I have all the form per each component and I need to get just one GeomCombination element per each sublist.
I post the solution… it may help someone in the future…
import clr
clr.AddReference('RevitAPI')
import Autodesk
from Autodesk.Revit.DB import *
from System.Collections.Generic import *
clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *
clr.AddReference('System')
from System.Collections.Generic import List
clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
A = UnwrapElement(IN[0])
elementsComb = []
initialElementsList = A
for i in initialElementsList:
elementsCombb = CombinableElementArray()
for ii in i:
elementsCombb.Append(ii)
elementsComb.append(elementsCombb)
lst = []
TransactionManager.Instance.EnsureInTransaction(doc)
for x in elementsComb:
lst.append(doc.CombineElements(x))
TransactionManager.Instance.TransactionTaskDone()
OUT = lst
Somehow there is a problem connecting between a handful of forms (4). Revit or Dynamo then hides the form that cannot be joined. Did you experience the same? And maybe came up with a a solution to detect the ErroJoined Forms or leave them out of the Join?
Gladly here from you.
Cheers for your work.
Patrick
Yes, I had the same issue. In fact, the closer the profiles were the more forms were not joined. I had to leave this approach because of this problem as I needed to place the profiles quite close to each other. To sum up, Revit can join some forms but for no reason (I spent some hours trying to find out the issue) Revit is not able no join some of them.
Hard to fix a problem without the data to reproduce. Can you build up a small sample dataset which causes the issue and post that so the larger community can help resolve?
