Why cant i create a dimention line here thanks

Revit
,
1

Hey guys, I came into a problem. I have this graph in which I am trying to make a dimension line between two references, which came out of the faces of a column. One of the nodes extracts the reference, and the other gets them and a detail line and is supposed to make the dimension line. For some reason, the dimension line is output, but I canโ€™t see it in the floor plan. If someone cares to take a quick look, it would be much appreciated.

ืฆื™ืœื•ื ืžืกืš 2025-10-14 090024
ืฆื™ืœื•ื ืžืกืš 2025-10-14 0900241855ร—986 353 KB

Here is the first one that extracts the references:

import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
import Autodesk.DesignScript.Geometry as DS

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.GeometryReferences)

clr.AddReference('RevitServices')
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

doc = DocumentManager.Instance.CurrentDBDocument

# Inputs from Dynamo
column = UnwrapElement(IN[0]) # Column as FamilyInstance
detail_curve = UnwrapElement(IN[1]) # ModelCurve or Line

# Ensure input is a FamilyInstance (column from a Family)
if not isinstance(column, FamilyInstance):
OUT = "Error: The input element is not a FamilyInstance", None
else:
# Set geometry options
options = Options()
options.ComputeReferences = True
options.IncludeNonVisibleObjects = True

geo = column.get_Geometry(options)

# Collect all solids from the column geometry
solids = []

for g in geo:
if isinstance(g, Solid)and g.Volume > 0:
solids.append(g)
elif isinstance(g, GeometryInstance):
inst_geo = g.GetInstanceGeometry()
for sg in inst_geo:
if isinstance(sg, Solid)and sg.Volume > 0:
solids.append(sg)

if len(solids) == 0:
OUT = "No solid found in column geometry", None
else:
# Prepare list to collect references of faces that have intersections
intersected_references = []
intersected_faces = []
for solid in solids:
for face in solid.Faces:
out_InterResultArray = IntersectionResultArray()
set_ComparisonResult, out_InterResultArray = face.Intersect(detail_curve.GeometryCurve, out_InterResultArray)

if set_ComparisonResult != SetComparisonResult.Disjoint:
intersected_references.append(face.Reference)
intersected_faces.append(face)
# Add only the Reference of the face

# Return list of face references (can be empty)
OUT = intersected_references

And the second one, how should create a dimension line

import clr
clr.AddReference('RevitAPI')
clr.AddReference('RevitAPIUI')
clr.AddReference('RevitNodes')
clr.AddReference('RevitServices')

from Autodesk.Revit.DB import *
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
import traceback

doc = DocumentManager.Instance.CurrentDBDocument

# ืงื‘ืœืช ื”ืงืœื˜ ืž-Dynamo
face_references = IN[0]  # ืจืฉื™ืžื” ืฉืœ ืฉืชื™ ื”ืคื ื™ื•ืช ืœืคื ื™ื
line = UnwrapElement(IN[1])      # ืงื• ืคืจื˜ื™ื ืœื”ื’ื“ืจืช ืžื™ืงื•ื ืงื• ื”ืžื™ื“ื•ืช

def create_dimension_between_faces(face_refs, line):
    """
    ื™ืฆื™ืจืช ืžื™ื“ื•ืช ื‘ื™ืŸ ืฉืชื™ ืคื ื™ื
    """
    try:
        # ื‘ื“ื™ืงืช ืชืงื™ื ื•ืช ื”ืงืœื˜
        OUT = "Checking input validity..."  # ื‘ื“ื™ืงืช ืชืงื™ื ื•ืช ื”ืงืœื˜
        if not face_refs or len(face_refs) != 2:
            raise ValueError("ื—ื™ื™ื‘ ืœื”ื™ื•ืช ื‘ื“ื™ื•ืง ืฉืชื™ ื”ืคื ื™ื•ืช ืœืคื ื™ื")
        
        if not line:
            raise ValueError("ื—ื™ื™ื‘ ืœืกืคืง ืงื• ืคืจื˜ื™ื")
        
        # ืงื‘ืœืช ื”ืžืกืžืš ื•ื”ืชืฆื•ื’ื” ื”ืคืขื™ืœื”
        print("Getting active document and view...")  # ืงื‘ืœืช ื”ืžืกืžืš ื•ื”ืชืฆื•ื’ื”
        
        
        # ืงื‘ืœืช ื”ื’ื™ืื•ืžื˜ืจื™ื” ืฉืœ ื”ืงื•
        #print("Extracting line geometry...")  # ื—ื™ืœื•ืฅ ื’ื™ืื•ืžื˜ืจื™ื™ืช ื”ืงื•
        line_curve = line.GeometryCurve
        
        # ื™ืฆื™ืจืช ReferenceArray ืžื”ื”ืคื ื™ื•ืช ืœืคื ื™ื
        #print("Creating reference array...")  # ื™ืฆื™ืจืช ืžืขืจืš ื”ืคื ื™ื•ืช
        ref_array = ReferenceArray()
        for face_ref in face_refs:
            ref_array.Append(face_ref)
        
        # ื”ืชื—ืœืช ื˜ืจื ื–ืงืฆื™ื”
        #print("Starting transaction...")  # ื”ืชื—ืœืช ื˜ืจื ื–ืงืฆื™ื”
        TransactionManager.Instance.EnsureInTransaction(doc)
        
        # ื™ืฆื™ืจืช ื”ืžื™ื“ื•ืช
        #print("Creating dimension...")  # ื™ืฆื™ืจืช ื”ืžื™ื“ื•ืช
        dimension = doc.Create.NewDimension(doc.ActiveView, line_curve, ref_array)
        
        # ืกื™ื•ื ื”ื˜ืจื ื–ืงืฆื™ื”
        #print("Committing transaction...")  # ืกื™ื•ื ื”ื˜ืจื ื–ืงืฆื™ื”
        TransactionManager.Instance.TransactionTaskDone()
        
        #print("Dimension created successfully!")  # ื”ืžื™ื“ื•ืช ื ื•ืฆืจื• ื‘ื”ืฆืœื—ื”
        return dimension
        
    except Exception as e: 
        error_msg = "ืฉื’ื™ืื” ื‘ื™ืฆื™ืจืช ื”ืžื™ื“ื•ืช: " + str(e)
        print(error_msg)
        print(traceback.format_exc())
        return None

# ื”ืจืฆืช ื”ืคื•ื ืงืฆื™ื”
#"Starting dimension creation process..." # ื”ืชื—ืœืช ืชื”ืœื™ืš ื™ืฆื™ืจืช ื”ืžื™ื“ื•ืช
result = create_dimension_between_faces(face_references, line)

# ื”ื—ื–ืจืช ื”ืชื•ืฆืื” ืœ-Dynamo
OUT = result
2

one quick fix i can think of is u add a dimension manually first, then query its location or the height of its reference line. then u go back to ur creation logic of reference line and lift it to the same height uโ€™ve just got. the benefit of this is u donโ€™t have to worry abt whether itโ€™s a workplane or a cut plane issue. and speakin of annotations, these are 3d though they look 2d.

btw, i tagged ur post to get more attention.

3

hey thank you very much for the tagging and for answering. if the detail line is placed ontop of the floor plan isnt it saing is Z value is the same as the plan? witch indicate that it is the corect Z value.

thanks for the respoend!

4

Hi,

faces references are sometimes FamilySymbol references, instance references are required for dimensions

Here is an example with a workaround:

5

not quite i believe. detail line is bound to workplane. and workplanes could be anywhere. this z value issue is one of the possible causes which happened to be the one i always forgot when coming back to rvt. i lifted them up then they showed up.

1 Like
6

Hey, thanks for the advice. I tried it, but it doesnโ€™t seem to work either. I donโ€™t think it had something to do with the line because I managed to do the same thing in the past, and it worked. I will try one more thing and let you know about it. thanks again

7

no worries. i would go with cyrilโ€™s suggestion @c.poupin and after that, visibility, worksets and etc. cant wait to see what you discover finally.

1 Like