Hi community,
I have been working on creating linear dimension between some family instances while some problems baffles me a lot.
I have the sample Revit file and dynamo file with more detailed comments uploaded at the bottom, 
Latest problem: Invalid number of references.
What I am trying to do is creating a linear dimension between the left edges on two boxes (1st and 4th) in a section view.
Like this:
What I have accomplished is create the dimension by referencing two detail lines drawn on the boxes.
Using method: NewDimension(view, line, referenceArray)
I sketched a model line on the wall serving as the second argument for the method.
Code in Python node:
doc = DocumentManager.Instance.CurrentDBDocument
uidoc = DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument
sel = uidoc.Selection
col = FilteredElementCollector(doc)
#Preparing input from dynamo to revit
c_1 = UnwrapElement(IN[0]).GeometryCurve
c_2 = UnwrapElement(IN[1]).GeometryCurve
direction_curve = UnwrapElement(IN[2]).GeometryCurve
ref_array = ReferenceArray()
ref_array.Append(c_1.GetEndPointReference(0))
ref_array.Append(c_2.GetEndPointReference(0))
#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)
doc.Create.NewDimension(doc.ActiveView, direction_curve, ref_array)
TransactionManager.Instance.TransactionTaskDone()
OUT = 0
Creation succeed:
From:
To:
But I really want to use the native references on the box instead of these detail lines.
So, I tried to retrieve the box geometry specific to the section view, and use one of the lines I have as reference.
doc = DocumentManager.Instance.CurrentDBDocument
uidoc = DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument
sel = uidoc.Selection
col = FilteredElementCollector(doc)
#Preparing input from dynamo to revit
elem = UnwrapElement(IN[0])
opt = Options()
opt.ComputeReferences = True
opt.IncludeNonVisibleObjects = True
opt.View = doc.ActiveView
lst = list(elem.get_Geometry(opt))
solid = lst[0]
geo_instance = lst[1]
instance_geo = list(geo_instance.GetInstanceGeometry())
#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)
TransactionManager.Instance.TransactionTaskDone()
OUT = solid.ToProtoType(), instance_geo[1:]
I separate the solid from the lines and convert it to ProtoGeometry just for previewing where the lines are on the box.
Now, left edges obtained.
Creation failed due to:
Line 53, the NewDimension() method, seems these two native references are not valid for creating dimension.
doc = DocumentManager.Instance.CurrentDBDocument
uidoc = DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument
sel = uidoc.Selection
col = FilteredElementCollector(doc)
#Preparing input from dynamo to revit
ref_array = ReferenceArray()
ref_array.Append(IN[0].Reference)
ref_array.Append(IN[1].Reference)
direction_line = UnwrapElement(IN[2]).GeometryCurve
#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)
dimension = doc.Create.NewDimension(doc.ActiveView, direction_line, ref_array)
TransactionManager.Instance.TransactionTaskDone()
OUT = dimension.ToDSType(True)
Really appreciate ur help!
Family & Dynamo Script & Revit File
