IfcOpenShell / Forums / Open Discussion: IFC File in a 2D Plan (Or how do I get the start and end point of a wall)

Hello,

I'm just starting to analyze IFC files using Python. For this I use IfcOpenShell for Python.

I have already managed to determine the x,y,z position, the length and thickness of a wall. Unfortunately I fail because I know only one point where the wall starts. The point where the wall goes I just can not find or no way to calculate this.

Can someone show me an example of how to do this?

The goal would be that I can convert the data from the IFC at the end into a plot output (or other 2D information). Should this go quite simply, also please let me know.

Here my code:

~~~

import ifcopenshell
import ifcopenshell.util
import ifcopenshell.util.placement
import ifcopenshell.util.element
import ifcopenshell.geom

import numpy as np
import math as m


with open ("./Desktop/Ausgabe.csv","w",encoding="cp1252") as Datei:
    Datei.write("Daten|Wert")

    ifc=ifcopenshell.open("./Desktop/Testraum.ifc")

    elements = ifc.by_type('IfcColumn')
    print ("Elemente",elements)
    settings = ifcopenshell.geom.settings()
    unit_scale = 0.001

    print ("Schema",ifc.schema)
    Datei.write("\r"+"Schema|"+ifc.schema)


    walls =ifc.by_type("IfcWall")
    print ("Anzahl der Wände",len(walls))
    Datei.write("\r"+"Anzahl der Wände|"+str(len(walls)))


    for durchlauf in range(len(walls)):


        Datei.write("\r"+"--------------------------------------------------------------------------------------------------------------")
        Datei.write("\r"+"--------------------------------------------------------------------------------------------------------------")

        wall=walls[durchlauf]

        daten= (ifcopenshell.util.element.get_psets(wall))

        location=ifcopenshell.util.placement.get_local_placement(wall.ObjectPlacement)

        Pos=location[0:3,3]

        print ("X",Pos[0])
        print ("Y",Pos[1])
        print ("Z",Pos[2])

        print (location[0:3,0])
        print (location[0:3,1])
        print (location[0:3,2])
        print (location[0:3,3])


        print ("----")

        for Bereich in daten:

            daten2=daten[Bereich]

            for f in daten2:

                Datei.write("\r"+f+"|"+str(daten2[f]))

            Datei.write("\r"+"--------------------------------------------------------------------------------------------------------------")

~~~

Thanks for any help

Peter

Last edit: Peter Top 2022-01-21

Hello everybody.
I am really a beginner user of Python and IfcOpenshell
Can someone help me in these questions?
I have a achive witch 2 buildings ar listed (see code below):
[In]

import ifcopenshell.geom
import ifcopenshell.util
from ifcopenshell.util.selector import Selector
selector = Selector()
import ifcopenshell.util.element as util
import pandas as pd
import ifcopenshell
ifc = ifcopenshell.open('FHZGR_PONTE DELL`ACCADEMIA_PH01_BEM.ifc')
ifc

[In]

buildings = ifc.by_type('IfcBuilding')
buildings

[Out]

[#164=IfcBuilding('2pHz_5mbKHwwFZeDF18Us0',#111,'Gebäude',$,$,#158,$,$,.ELEMENT.,$,$,#197063),#266=IfcBuilding('3XKt_rkWGHwwHrt4e_RK0V',#211,'Gebäude',$,$,#258,$,$,.ELEMENT.,$,$,#25030)]

[In]

GB01 = buildings[1]
GB01

[Out]

#266=IfcBuilding('3XKt_rkWGHwwHrt4e_RK0V',#211,'Gebäude',$,$,#258,$,$,.ELEMENT.,$,$,#25030)

[In]

GB02 = buildings[0]
GB02

[Out]

#164=IfcBuilding('2pHz_5mbKHwwFZeDF18Us0',#111,'Gebäude',$,$,#158,$,$,.ELEMENT.,$,$,#197063)

Untill hier everything is ok:
But my aim ist to extract all elements of the buildings.
For this i used the code below:

[In]

typeObjects = ifc.by_type('IfcTypeObject')
listTypes=[]

for typeObject in typeObjects:
    relobjs = typeObject.ObjectTypeOf[0]
    if relobjs:
        for obj in relobjs.RelatedObjects:
            listObj = [obj.is_a(),
                        typeObject.Name,
                        obj.Name,
                        obj.GlobalId]
            listTypes.append(listObj)
listTypes

[Out]

[['IfcDoor', 'D-1', 'TIW01', 'Innentür', '11u3SSoB0HwwFfeDF18Us0'],
 ['IfcDoor', 'D-1', 'TIW01', 'Innentür', '11u3Z3oB0HwwFfeDF18Us0'],
 ['IfcDoor', 'D-1', 'TIW01', 'Innentür', '11u3dAoB0HwwFfeDF18Us0'],
 ['IfcDoor', 'D-1', 'TIW01', 'Innentür', '11u3hHoB0HwwFfeDF18Us0'],
 ['IfcDoor', 'D-1', 'TIW01', 'Innentür', '11u3lOoB0HwwFfeDF18Us0'],
 ['IfcDoor', 'D-1', 'TIW01', 'Innentür', '11u3sToB0HwwFfeDF18Us0'],
 ['IfcDoor', 'D-1', 'TIW01', 'Innentür', '11u3_doB0HwwFfeDF18Us0'],
  ['IfcWallStandardCase','WAA_22', 'WAA_22',
  'Holzelementwand vorgefertigt',
  '3$JJG0mkGHwwHtt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_20', 'WAI_20', None, '0avSRmnsCHwwHzt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_30', 'WAI_30', None, '3aYimBkwCHwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAA_62', 'WAA_62', None, '3v$N4zkwGHwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_40', 'WAI_40', None, '3v$N54kwGHwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_25', 'WAI_25', None, '3v$N5GkwGHwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_15', 'WAI_15', None, '3v$N5ikwGHwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_8', 'WAI_8', None, '0hIitBkwKHwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAA_52', 'WAA_52', None, '1fFsNumKCHwwHtt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_5', 'WAI_5', None, '2csBuao7WHwwH_t4e_RK0V'],
 ['IfcDoor', 'D-1', 'TAW', 'Aussentür', '2mMWS$o4qHwwFeeDF18Us0'],
 ['IfcDoor', 'D-1', 'TAW', 'Aussentür', '2nbOFUo4qHwwFeeDF18Us0'],
 ['IfcDoor', 'D-1', 'Schiebetür', 'Aussentür', '2qRDDjo4qHwwFeeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster', None, '2vSrZWmbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster', None, '2vSruqmbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster 500.', None, '2rkDT7o4qHwwFeeDF18Us0'],

 ['IfcWallStandardCase', 'WAI_30', 'WAI_30', None, '3xwllnkluHwwHrt4e_RK0V'],
 ['IfcWallStandardCase',
  'WAI_12.5',
  'WAI_12.5',
  None,
  '0I$g0pklyHwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAA_62', 'WAA_62', None, '284uo0lI4HwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAA_52', 'WAA_52', None, '284uo1lI4HwwHrt4e_RK0V'],
 ['IfcWallStandardCase', 'WAI_40', 'WAI_40', None, '3jrZxcn40HwwHtt4e_RK0V'],
 ['IfcWindow', 'W-1', 'Abgehängte Fassade', None, '3GjyCLmbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Abgehängte Fassade', None, '3Gjxx8mbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster ', None, '1Un5jnsgeHwwFmeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster', None, '3D1DxfmbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster', None, '3D1EL6mbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster', None, '3D1EkZmbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster', None, '3D1F80mbKHwwFZeDF18Us0'],
 ['IfcWindow', 'W-1', 'Fenster', None, '3D1FXTmbKHwwFZeDF18Us0'],
 ````
In other words only the following IFCs: Wall, Proxy, Door and Windows where exported.
Other Elements like Slabs, Ramps, Columns and so on were not listed.
I realised lather that the not listed objects have no  attribute 'TypeOfObject' 

In this case i tried this code:

[In]

[Out]

[#1539782=IfcWallStandardCase('3htFgQoBGHwwFfeDF18Us0',#111,'WAA_22','Holzelementwand vorgefertigt','WAA_22',#1539779,#1539780,$),
#227652=IfcWallStandardCase('30$lAVkBuHwwFWeDF18Us0',#211,'WAA_52',$,'WAA_52',#227649,#227650,$),
#11220749=IfcWallStandardCase('1QIOamkX0HwwHrt4e_RK0V',#111,'WAI_15',$,'WAI_15',#11220746,#11220747,$),
#2481991=IfcDoor('11DmrBmneHwwFZeDF18Us0',#211,'TIW','Innentür',$,#2501178,#2482231,$,2100.,2280.),
#2332896=IfcWallStandardCase('2QybFYfbuHwwHpt4e_RK0V',#211,'WAI_8',$,'WAI_8',#2332893,#2332894,$),
#11224218=IfcBeam('0p54Jmu0qHwwFneDF18Us0',#111,'Träger',$,'Kehlbalken',#11224204,#11224216,'Kehlbalken'),
#1477238=IfcColumn('0WxCkdrOmHwwI0t4e_RK0V',#111,'Column ',$,$,#1477219,#1477236,$),
#2178642=IfcBeam('3iw2HCu0eHwwFneDF18Us0',#211,'IfcBeam',$,$,#2178647,#2178643,$),
#194880=IfcBeam('23njxyrOaHwwFkeDF18Us0',#111,'Träger',$,'Kehlbalken',#194866,#194878,'Kehlbalken'),
#11054027=IfcWallStandardCase('23ui3ckXaHwwHrt4e_RK0V',#111,'WAI_20',$,'WAI_20',#11054024,#11054025,$),
#11047523=IfcDoor('1hiWcEoB0HwwFfeDF18Us0',#111,'TIW01','Innentür',$,#11073877,#11047763,$,2100.,1000.),
#2209930=IfcWindow('3nbvLQoO0HwwFfeDF18Us0',#211,'Fenster',$,$,#2349661,#2211434,$,2650.,5300.),
#2154548=IfcWallStandardCase('3edYbImluHwwFZeDF18Us0',#211,'WAI_20',$,'WAI_20',#2154545,#2154546,$),
#2153157=IfcWallStandardCase('2zSZ$6kJCHwwHrt4e_RK0V',#211,'WAI_12.5',$,'WAI_12.5',#2153154,#2153155,$),
#1721987=IfcWallStandardCase('0P_j1AlI4HwwHrt4e_RK0V',#111,'WAA_22','Holzelementwand vorgefertigt','WAA_22',#1721984,#1721985,$),
#190579=IfcWallStandardCase('0hIitIkwKHwwHrt4e_RK0V',#111,'WAI_20',$,'WAI_20',#190576,#190577,$),
#2337623=IfcDoor('0_UDKQmneHwwFZeDF18Us0',#211,'TIW','Innentür',$,#2355391,#2337863,$,2100.,940.),
````
Actually the result that i wanted

My wish is to convert this parse into a df to generate a list like this one:

    Clase   Tipo    Objecto     Descripcion     ID
0   IfcDoor     D-1     TIW01   Innentür    11u3SSoB0HwwFfeDF18Us0
1   IfcDoor     D-1     TIW01   Innentür    11u3Z3oB0HwwFfeDF18Us0
2   IfcDoor     D-1     TIW01   Innentür    11u3dAoB0HwwFfeDF18Us0
3   IfcDoor     D-1     TIW01   Innentür    11u3hHoB0HwwFfeDF18Us0
4   IfcDoor     D-1     TIW01   Innentür    11u3lOoB0HwwFfeDF18Us0
...     ...     ...     ...     ...     ...
937     IfcWallStandardCase     WAI_8   WAI_8   None    03nzs_irCHwwFVeDF18Us0
938     IfcWallStandardCase     WAI_40  WAI_40  None    0YiO6ojEeHwwFVeDF18Us0
939     IfcWallStandardCase     WAA_40  WAA_40  None    0cHZj3nT8HwwHwt4e_RK0V
940     IfcBuildingElementProxy     WAA_22  WAA_22  None    1dbAzLnKqHwwHwt4e_RK0V
941     IfcWallStandardCase     WAA_22  WAA_22  None    1dbAzMnKqHwwHwt4e_RK0V

942 rows × 5 columns

and export it like a csv.file

Question 1: ist that possible?
Question 2: how can i separate the elements according to their building?

Thank you in advance

Archie1969

Last edit: Arcangelo Sergio-Böckle 2022-06-20

IFC File in a 2D Plan (Or how do I get the start and end point of a wall)

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IFC File in a 2D Plan (Or how do I get the start and end point of a wall)