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Arraying in IFC

1. T by theoryshaw on 16 Sep 2020, edited 12 Apr 2022 # +1 votes

   Apparently there's no support for 'arraying' in IFC.

   https://forum.freecadweb.org/viewtopic.php?f=39&t=50085

   Would be awesome if freecad/blenderbim implemented a tweak to the IFC to support this, and then in turn proposed it back to BuildingSmart. :)

2. M by Moult on 16 Sep 2020 # +1 votes

   Definitely something we should do. Same with mirroring. Which happens all the time.

   But I think I should check first, since I think when I asked this to buildingSMART last time they were working on adding it with the roads / infra extension.

3. Y by yorik on 19 Sep 2020 #

   ATM in freecad an array is exported as an IfcElementAssembly of objects with shared geometry. But we could define together properties that would define the array, that apps could use to reconstruct it.

   Which more and more leads to, we should have some kind of "official" place to define such properties. The good thing is that it would not invalidate the schema, other apps not aware of these properties would still see it as as assembly

4. T by theoryshaw on 19 Sep 2020 #

   cool.

   ...we should have some kind of "official" place to define such properties.

   https://gitlab.com/osarch/FreeMVD_WorkFlow seems like it would be good place for it.

5. T by theoryshaw on 12 Apr 2022 #

   related:

   • https://community.osarch.org/discussion/721/beam-systems

   • https://github.com/buildingSMART/NextGen-IFC/issues/84

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