IFC Import from ArchiCAD. Strange lines in/on the floor.

[Anonymous]

Hi,

I'm working on a project as a HVAC Engineer, using Revit 2017.1. The Architect uses ArchiCAD.

The Architect exports to IFC which i Open in Revit (Open IFC) then saves as a RVT.

The picture below shows how the floors end up after the opening/saving process.

Anyone know a fix for this?

[FGPerraudin]

Hi @Anonymous,

This is just the real trinagle geometry of your floor.

The export had to create that geometry for 3D reasons.

Check the following for me:

• in the visibility/graphics of your view, check that Floors > Interior edges is unchecked
• if this doesn't work, check that your floor is flat (same altitude everywhere). If it is not, it is normal that the export module creates these edges.
• finally, if these do not work, try re-exporting, without a hole in it for the swimming pool .

Personnaly I think it is the export module triangulates your surface and cannot write a complex polyline surfaces.

Then nothing to do but play with visibilities (hide all edges in your link or make their color white for example) or worst case scenario linework your way through it (would work but be very long...)

I hope this will help,

François

[DMK™]

Maybe you can try specialized exporter, it may convert elements more smoothly

"ARCHICAD Connection Add-In for Autodesk Revit"

http://www.graphisoft.com/downloads/interoperability.html

[Anonymous]

Hi,

Thanks for the tips, unfortunately It didn't work.

The VG settings didn't affect it at all, and the floors are flat.

Using Override Graphics in View does hide the lines on the floor, but also hides other specific lines like in Walls etc.

I'm going to check with the architect if there is any difference between the floors (floor types) since some show up as normal without the strange lines.

[Anonymous]

Hi,

I did download the Graphisoft addin, and tryed to import,  but the Architect file is 260mb and it takes a few hours to import/rebuild. 

I'll try that after work today, and let the computer work with the rebuild over night.

A "IFC to Revit" converter outside of Revit would be golden. 🙂

Also, I'm trying to use the Architects Rooms to convert to Spaces via Space Naming Utility. Sadly the spaces gets messed up every time i import a new version of the Architects model. Maybe the Graphisoft Addin fixes this.

The house is approximately 42000m² (452084.2ft²), and the house has more than 1000 Rooms.

Keeping track of which spaces that are gone/missing is really dull work.

Maybe i should try to open a Revit Arch. Template and link the IFC, then just reload the new IFC files i get, from the .RVT file you get for linking the IFC.
Not sure if i get the same options in Visibility Graphics that way thought. 

Thanks

[Sahay_R]

You have been bitten by the Triangulation Monster!

To the best of my knowledge, there is very little you can do about it unless the exporter works without triangulating the geometry.

A Revit workaround - go over the edges with Invisible Lines. Use the Pick Lines option. Should work better than the one that follows!

One workaround - which, by the way, is beyond painful, is to open your file in 3DS Max, apply an Edit Mesh modifier, make the triangle lines invisible, export to a 2007 DXF, and then into Revit. However in the process your model may lose any intelligence that was preserved in the IFC. Hee hee hee hee.

[Anonymous]

Thankfully i do get DWGs to use in Floorplan view.

So i just unload the Revit file in Planview via View Template. 

The problem with spaces does still remain, but now, after you're input I'm sure it's something else.

Thank you

[Anonymous]

Hi Fillefoe, I've just found a brilliant solution for this issue!

After months exporting and importing files from ArchiCAD20 to Revit2017 I discovered that the major problem was the "Export Translator" inside ArchiCAD.

I am attaching a picture with the settings you should put inside the translator. Also, it is needed to use the Addon "Improved IFC import" with Revit!!

This solutions is SO GOOD, that Revit imports everything in Editable Familys. I could even edit walls and floors inside Revit after importing IFC from ArchiCAD!

There is it:

Comparing IFC with strange lines and IFC with solutionSolution inside ArchiCAD

[Anonymous]

There is another example from above:Example of recognizing rooms and wall family

[olga.budarina]

Hi!

I wonder if you could help me. We are struggling with Space issue from updated IFC in Revit. 

As you described after updating of IFC, spaces get messed up. And considering that our HVAC engineers have a lot of information bound to spaces, is a huge problem for them. 

Did that setup for export in Archicad help with that issue? 

I m not an Archicad user could you please describe what setting were used?