Extract IFC class instances using IfcConvert CLI?

[FransKnibbe]

Hello! I am looking for a way to extract individual IFC objects from an IFC file into GLB files. For example: convert one IfcSpace instance with a certain name or ID to a GLB file. I have looked at the include and exclude arguments, but so far my attempts have been unsuccessful.

[Moult]

Gday! Have you read https://docs.ifcopenshell.org/ifcconvert/usage.html ? Dion Moult Sent from Proton Mail mobile

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-------- Original Message --------

On 11 Apr 2024, 11:50 pm, Frans Knibbe wrote: Hello! I am looking for a way to extract individual IFC object from an IFC file into GLB files. For example: extract one IfcSpace instance with a certain name or ID to a GLB file. I have looked at the include and exclude arguments, but so far my attempts have been unsuccessful. — Reply to this email directly, [view it on GitHub](#4541), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/AAAVR3TOLHHOEIT5TT5IILDY42II5AVCNFSM6AAAAABGCLEWUWVHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZWGQ4TCNRQGQ). You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[FransKnibbe]

Yes, I have read the man page. Based on that, I tried something like

IfcConvert --include=Name "spaceX" in.ifc spaceX.glb

That results in a syntax error:

[Error] Invalid usage of '--include': the argument for option '--include' is invalid

So I think I actually have two questions:

1. How can I get the syntax for the --include' argument right?
2. Does --include exclude everything else?

[Moult]

The syntax is described perhaps it's not too clear without examples. Here's an example:

./IfcConvert  -v --include attribute GlobalId 1yETHMphv6LwABqR4Pbs5g attribute GlobalId 1yETHMphv6LwABqR0Pbs5g model.ifc out.glb

Yes, if you use include, then everything else is excluded.

[FransKnibbe]

Thanks a lot, Dion! The example certainly helped. At first I tried something like your example, but then I got the error
[Error] Input file not specified. Then I noticed this bit in the usage text: "-include and --exclude cannot be placed right before input file argument". Moving the -v argument helped to resolve that. So somehting like this works for me:
./IfcConvert --include entities IfcSpace attribute GlobalId 0b1r3gEG57G93Rt29P2yO$ -v model.ifc out.glb.