BlenderBIM: add an IFC class to a collection

T by theoryshaw on 27 Oct 2020, edited 27 Oct 2020 #

Is there a way to add an IFC class to a collection?

C by Cyril on 27 Oct 2020, edited 27 Oct 2020 # +1 votes

Nope but if you look at IfcProject, IfcSite, IfcBuilding you will see that they contain an empty object (Plain Axes) which is there only to receive the IfcClass and data related to the collection which contains it.

T by theoryshaw on 27 Oct 2020 #

Thanks @Cyril

put in a feature request: https://github.com/IfcOpenShell/IfcOpenShell/issues/1051

T by theoryshaw on 27 Oct 2020 #

As a workaround, i just copied an existing 'empty object' from IfcBuilding and renamed it the same name as the collection and then move it into that collection.

Hope that works.

M by Moult on 27 Oct 2020 # +2 votes

Although Blender can store data on a collection, it is not visible in the UI. Therefore, the approach used is to have this empty object. The workaround you mentioned is not a workaround, it is the intended workflow :) An empty object is any semantic object that doesn't have a physical representation.