Getting OverallHeight from a IFCWindow

M by Max on 28 Jun 2022, edited 11 Jul 2022 #

I wonder if somebody knows how to get OverallHeight and Width from a selected IFCWindow? I guess you first need to determine if they have these attributes. I just tried

from bpy import context as C

 for ob in C.selected_objects:

  print (ob.OverallHeight)

but of cource it was not that simple

M by Max on 30 Jun 2022 #

I thought the name might be a custom property and used bpy.data.objects[str(obj.name)]['name']) but no luck.

M by Max on 11 Jul 2022 #

Ok, I solved it kind of

from blenderbim.bim.ifc import IfcStore

ifc_data = IfcStore.get_file()

windows = ifc_data.by_type('IfcWindow')

for window in windows:

    print(window.OverallHeight)

    print(window.OverallWidth)

gives me the height and width of all windows but the problem is that I want the user to select the windows like

import bpy

selection = bpy.context.selected_objects

for  obj in selection: 

    if obj.name.startswith("IfcWindow"):

        print (obj.OverallHeight)

but then I get AttributeError: 'Object' object has no attribute 'OverallHeight'

B by bruno_perdigao on 11 Jul 2022 #

Hi @Max, I think the problem is that you are trying to access the IFC property through the Blender Object. You have to get the IFC entity from the Blender object first. I haven't fully tested it, but maybe this will work:


import bpy

import blenderbim.tool as tool

from blenderbim.bim.ifc import IfcStore

ifc_data = IfcStore.get_file()

selection = bpy.context.selected_objects

for  obj in selection: 

    if obj.name.startswith("IfcWindow"):

        ifc_entity = tool.Ifc.get_entity(obj) #gets the Ifc Entity from the Blender object

        print (ifc_entity.OverallHeight)

M by Max on 11 Jul 2022 #

Thanks a lot, I suspected something like this. For some reason tool.Ifc.get_entity(obj) gets "None" and then AttributeError: 'NoneType' object has no attribute 'OverallHeight'

B by bruno_perdigao on 11 Jul 2022 #

I tested with two different files, and it worked for me. Maybe it's something with the file?

M by Max on 11 Jul 2022 # +1 votes

I feel like a complete idiot. I downloaded the IFC from this forum but I guess it was too experimental. With a typical Revit file it worked fine. Thanks for all your help.