Architectural IFC Import-Export Problem

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cnirbhay
Posts: 85
Joined: Wed Aug 17, 2016 4:24 pm

Architectural IFC Import-Export Problem

Postby cnirbhay » Wed Mar 01, 2017 4:26 pm

OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.10235 (Git)
Build type: Release
Branch: master
Hash: e5fe3d8e107bc604bc868922d82f5fb3611cdd93
Python version: 2.7.8
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.0.0

Hello, Everyone.

I modeled a simple house in Revit-2017 and exported it to IFC.
Sample House.ifc
(34.35 KiB) Downloaded 3 times

Then I imported that file to FreeCAD which opened fine. Now I exported this file again as IFC, but this time from FreeCAD.
Re-exported.ifc
(70.63 KiB) Downloaded 3 times

When I open the file both in FreeCAD and Revit, I get disturbed model.
Screenshot (266).png
Screenshot (266).png (154.18 KiB) Viewed 169 times

Screenshot (267).png
Screenshot (267).png (107.49 KiB) Viewed 169 times

This error usually occur whenever the file is exported as IFC from FreeCAD.
Why does so happen? :(
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yorik
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Posts: 8633
Joined: Tue Feb 17, 2009 9:16 pm
Location: São Paulo, Brazil
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Re: Architectural IFC Import-Export Problem

Postby yorik » Thu Mar 02, 2017 1:37 pm

Because Revit hates IFC :)

Seriously though, there are a lot of problems with IFC files in FreeCAD, not only the ones from FreeCAD. I usually look at my files in ifc++, bim vision or solibri, and if everything is okay there, then i consider the file is ok. And even so, often there are problems in revit.

We can try to fix them as they come, but we must identify the issues better.

Also, try linking the IFC file instead of importing in revit, that often works much better