Connecting Spaces of a Stair

A by alfasst on 14 Mar 2024, edited 16 Mar 2024 #

I was trying to find connected spaces using IfcOpenShell. But I couldn't find a way to extract the spaces connected by a stair. I am using the FZK Haus as the sample file. I have tried the geometry tree approach and was able to find the bottom space connected but not the top space.

A by Andrej730 on 15 Mar 2024 #

@alfasst said:

I was trying to find connected spaces using IfcOpenShell. But I couldn't find a way to extract the spaces connected by a stair. I am using the FZK Haus as the sample file. I have tried the geometry tree approach and was able to find the bottom space connected but not the top space.

Hi! Can you please show the code that didn't worked?

Just tested the code below with bounding box selection:


import ifcopenshell


ifc_file = ifcopenshell.open(r"AC20-FZK-Haus.ifc")


import multiprocessing

import ifcopenshell.geom

from pprint import pprint




def check_intersections(ifc_file):

    tree = ifcopenshell.geom.tree()

    settings = ifcopenshell.geom.settings()

    iterator = ifcopenshell.geom.iterator(

        settings, ifc_file, multiprocessing.cpu_count()

    )

    if iterator.initialize():

        while True:

            tree.add_element(iterator.get_native())

            if not iterator.next():

                break


    element = ifc_file.by_type("IfcStair")[0]

    pprint(tree.select_box(element))




[#59290=IfcSlab('2RGlQk4xH47RHK93zcTzUL',#12,'Slab-033',$,$,#59253,#59286,'DA0A17AC-B773-47AC-99-C5-D390C73AD5CC',.FLOOR.),

 #33774=IfcSpace('0Lt8gR_E9ESeGH5uY_g9e9',#12,'5',$,$,#33683,#33769,'Wohnen',.ELEMENT.,$,$),

 #59365=IfcOpeningElement('16PF6khT5_p$Z03P73inyv',#12,'Slab Opening',$,$,#59331,#59361,$,$),

 #39432=IfcMember('1qMEiq1Qz6guq8g1GCODiJ',#12,'Sparren-34',$,$,#39415,#39428,'3A999AF6-1C12-413A-89-B2-BF4A3CAEAD63',$),

 #39186=IfcMember('1NBDw_i_jD$u7IjvwmbPmx',#12,'Sparren-32',$,$,#39169,#39182,'62D6313A-B4FB-45BF-B3-97-10D01124A4F9',$),

 #39309=IfcMember('2DH$OLoObDkAtwqVzNdUnS',#12,'Sparren-33',$,$,#39292,#39305,'E4FF91FA-3AE7-4591-8D-5F-61E57F7BA5DE',$),

 #14502=IfcStair('38a9vdh9bF5Qg28GWyHhlr',#12,'Wendeltreppe',$,$,#502,#14498,'79A67A01-C95B-4209-86-9A-74983B65305C',$),

 #59753=IfcSlab('2IxUUNUVPB6Ob$eicCfP2N',#12,'Dach-2',$,$,#59716,#59749,'BD6D9414-37DF-40A8-88-40-301A32A9A5B5',.ROOF.),

 #49831=IfcRailing('0o5vgCKyTBzO5$QJcI2YDP',#12,'',$,$,#40768,#49827,'00000000-0000-0000-00-00-000000000000',.HANDRAIL.),

 #76214=IfcSpace('2dQFggKBb1fOc1CqZDIDlx',#12,'7',$,$,#76123,#76209,'Galerie',.ELEMENT.,$,$)]


check_intersections(ifc_file)

A by alfasst on 16 Mar 2024 #

@Andrej730 Thanks. This code is working. I think the part that is not working in my code is where i specified IfcSpace as include items.


        iterator = ifcopenshell.geom.iterator(

            settings, ifc_file, multiprocessing.cpu_count(),  include=("IfcSpace")

        )

But if i remove the include parameter, it is working. Thanks again.