Get Rotation of Instance Families in Python

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Hello everyone,

I am developing a Python script in Dynamo/REVIT to obtain information about the rotation of instance families, as shown in the image below.

Tela
Tela1521×991 141 KB

However, when running the code, the returned value is “NULL”. It is important to mention that this is not a selection issue, as I am indeed selecting an instance family.

Here is the code I developed:

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

clr.AddReference(‘RevitServices’)
from RevitServices.Persistence import DocumentManager

doc = DocumentManager.Instance.CurrentDBDocument

def get_rotation(family_instance):
location_point = family_instance.Location
if isinstance(location_point, LocationPoint):
return location_point.Rotation
return None

family_instances = UnwrapElement(IN[0])

rotations =
for instance in family_instances:
rotation = get_rotation(instance)
rotations.append(rotation)

OUT = rotations

Can anyone help me with the code? Where am I going wrong?

Note: I am aware that there are Dynamo packages, such as the GENIUS LOCCI tools, that solve this problem, but I do not want to use them. I want to create my own code.

Thank you all in advance for your attention.

1 Like
2

@ADAP-Ass.Tre ,

intresting in your rotation there is the number pi that means either 0 or 360 degres (?)…

…just for better reading, your code pasted like this

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

clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager

doc = DocumentManager.Instance.CurrentDBDocument

def get_rotation(family_instance):
    location_point = family_instance.Location
    if isinstance(location_point, LocationPoint):
        return location_point.Rotation
    else:
        return None


family_instances = UnwrapElement(IN[0])

rotations = []
for instance in family_instances:
    rotation = get_rotation(instance)
    rotations.append(rotation)

OUT = rotations

actually i skipped the part with isInstance, i collected in the code, so unwrapping is not necessary.

import clr

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Structure 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
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument

# 🎣 get elements 
elements = FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_GenericModel).WhereElementIsNotElementType().ToElements()

# 📐 get rotation
elementRotations = [i.Location.Rotation for i in elements]

OUT = elements, elementRotations

image
image933×975 66.5 KB

by the way GeniusLocci is a Genius, because you can copy and modify his code for any porposes…

2 Likes
3

Hello @Draxl_Andreas Draxl_Andreas,

Thank you very much for responding to my post. Your help was crucial in solving my problem. I compared your code with mine and discovered the mistakes I made, especially with the library and the “uidoc,” among other lines. Your guidance was excellent.

I corrected the issues and adapted the code for CPython3. Here is my code:

import clr

clr.AddReference(‘RevitAPI’)
clr.AddReference(‘RevitAPIUI’)

from Autodesk.Revit.DB import *
from Autodesk.Revit.UI import *

import System
from System.Collections.Generic import List

from RevitServices.Persistence import DocumentManager

doc = DocumentManager.Instance.CurrentDBDocument
uidoc = DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument

def unwrap_elements(elements):
return elements

elements = unwrap_elements(IN[0])

elementRotations =
for i in elements:
location_point = i.Location
if isinstance(location_point, LocationPoint):
elementRotations.append(location_point.Rotation)
else:
elementRotations.append(None)

OUT = elements, elementRotations

Once again, thank you for your help. We can successfully close this post now.

1 Like