IFC export strange shape

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Benny
Posts: 3
Joined: Mon Nov 08, 2021 4:59 pm

IFC export strange shape

Post by Benny »

Hello
I am unable to handle the import/export of Ifc correctly.
I have two examples here that I have tried a little with.
#1: Walls and pipes created in BIM workbench, the walls are ok but the pipes become in all the viuwers I checked in angular and when reimported to Freecad I can not find them on the screen. They appear on the model tree but not on the screen.

#2:Here is a part created in Part Design, just gets weird in, for example, Ifc++. When reimporting to Freecad = ( Not Responding).
The import may not have anything to do with ifc because I can't import it back to Freecad as FCStd either apparently.

I'm grateful for some help here.....
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: Swedish/Sweden (sv_SE)

Regards Benny from Sweden
Attachments
Pipe from BIM workbench
Pipe from BIM workbench
wall_ pipe.png (31.29 KiB) Viewed 5540 times
Current export settings
Current export settings
exp settings.png (100.77 KiB) Viewed 5540 times
Column from BIM workbench
Column from BIM workbench
wall_column.png (41.61 KiB) Viewed 5540 times
Wall column pipe support.FCStd
(55.47 KiB) Downloaded 71 times
Benny
Posts: 3
Joined: Mon Nov 08, 2021 4:59 pm

Re: IFC export strange shape

Post by Benny »

Adding Part #2.
Attachments
Part #2 from part design in IFC plusplus
Part #2 from part design in IFC plusplus
Belysningsfundament IFCplusplus.png (66 KiB) Viewed 5486 times
Part #2 from part design
Part #2 from part design
Belysningsfundament Freecad.png (683.85 KiB) Viewed 5486 times
Belysningsfundament_R1.FCStd
Part#2 from Part design
(173.22 KiB) Downloaded 72 times
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Shalmeneser
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Joined: Wed Dec 23, 2020 12:04 am
Location: Fr

Re: IFC export strange shape

Post by Shalmeneser »

Why do you use Boolean operations ?

Code: Select all

 └ Fundament (Body)
    ├ AdditiveLoft (AdditiveLoft)
    │  ├ Bottom (Sketch)
    │  └ Top (Sketch)
    ├ SubtractiveLoft (SubtractiveLoft)
    │  ├ Hole top001 (Sketch)
    │  └ Hole bottom001 (Sketch)
    └ SubtractivePipe (SubtractivePipe)
       ├ Hole profile001 (Sketch)
       └ Hole path001 (Sketch)
Attachments
Capture du 2021-11-11 18-46-45.png
Capture du 2021-11-11 18-46-45.png (37.36 KiB) Viewed 5476 times
Belysningsfundament_R1_SHALM.FCStd
(56.28 KiB) Downloaded 69 times
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thomas-neemann
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Location: Osnabrück DE 🇩🇪
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Re: IFC export strange shape

Post by thomas-neemann »

Benny wrote: Thu Nov 11, 2021 5:20 am
hello benny

I only use ifc for the geometry with no attributes. I do it this way and it has always worked out so far

(I think that rounded objects sometimes turn into angular objects is normal)

Wall.ifc
(25.04 KiB) Downloaded 72 times

https://www.youtube.com/watch?v=VOx9XVPsqms


phpBB [video]
Gruß Dipl.-Ing. (FH) Thomas Neemann

https://www.youtube.com/@thomasneemann5 ... ry=freecad
Benny
Posts: 3
Joined: Mon Nov 08, 2021 4:59 pm

Re: IFC export strange shape

Post by Benny »

Thank you very much for the help, I am new to this so all tips that can point me in the right direction are gratefully received.
Tried to do the part without booleans and indeed it worked very smoothly.
I would really like to introduce BIM as a way of working in my everyday life as a construction worker/excavator operator. In order to get a smooth solution that lasts all the way to the actual construction in the workplace, IFC is probably the best solution after what I can understand. So for me, IFC management is the key.
I agree that the shape of the parts is not really important at all. It is all the data that the IFC schema can contain that is the most important and I am training to provide the models with attributes and propertysets. I think I do quite well with the information management at IFC in Freecad.
The problem is when to introduce the way of working to any other "end user" and try to persuade them to try "BIM workflow" instead of the old usual way with a bunch of drawings that are shared, emailed, copied, changed, etc. Well, it is realy difficult to persuade a supervisor or an old carpenter to use a drawing (BIM model) where the geometries do not resemble what is to be built....
Have so far tried to follow BIM with FreeCAD – The BIM workbench tutorial by Yorik, but I will definitely try this way too.
Again, thank you for your help. I'll try it again.
paullee
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Posts: 5098
Joined: Wed May 04, 2016 3:58 pm

Re: IFC export strange shape

Post by paullee »

Benny wrote: Thu Nov 11, 2021 5:20 am Hello
I am unable to handle the import/export of Ifc correctly.
I have two examples here that I have tried a little with.
#1: Walls and pipes created in BIM workbench, the walls are ok but the pipes become in all the viuwers I checked in angular and when reimported to Freecad I can not find them on the screen. They appear on the model tree but not on the screen.
Confirmed.
  1. Wall exported, re-imported into FC - OK
  2. Column with those profile - need Force BRep to re-imported to FC OK
  3. Pipes - even Force BRep - NOT OK
Moving to IFC sub-forum in Draft, Arch & BIM forum for more discussion :)

Test_ Ifc_ Wall column pipe support.ifc
(18.3 KiB) Downloaded 73 times
Test_ Ifc-Force-BRep_ Wall column pipe support.ifc
(25.31 KiB) Downloaded 76 times
Screenshot from 2021-11-13 02-41-02.png
Screenshot from 2021-11-13 02-41-02.png (213.09 KiB) Viewed 5295 times
Screenshot from 2021-11-13 02-41-09.png
Screenshot from 2021-11-13 02-41-09.png (213.66 KiB) Viewed 5295 times
paullee
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Joined: Wed May 04, 2016 3:58 pm

Re: IFC export strange shape

Post by paullee »

bernd wrote: Ping
Would like to have a look at this problem ? Thanks.
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