I have not found a way to extract all entities without having to specify them individually. Is there a way to do so, or is ther a way to get a set of all available entities/IfcClasses?
Edit: Ok kinda found it. It’s hidden via IFC Building Storey Products
You can also use abstract classes, such as “IfcElement” or “IfcBuildingElement” or “IfcDistributionElement”. This should then include all sub types.
Good to know!
And is there also a way to access/extract entities via the PredefinedType?
(I think only the ObjectType via the ggIFC Decompose Element kind of gives me that information - afaik this is it for Archicad generated IFCs but not sure if that’s always the case)
What’s the best practice workflow to always get the “last entites”? For example I can extract the IfcBuildingElementParts of Walls (to get material inforamtion) but how do I know that they do decompose within GeomGym? Some elements for example consist of other entities, so how do I achieve this best - e.g. for material extraction.
Edit: Would be nice to have also outputs for “PredefinedType” and “Decomposes” or Relationships too in this component. Probably they are there and I simply have not detected them.
Edit: 2
Ok found it, of course there is also this component which gives me information about decomposing children.
It would be helpful to have a sample IFC file (and grasshopper script) to demonstrate this with.
But once you have decomposed down to a certain level, you can use the “extraction” component to get all IfcElement (or IfcProduct) as children (all generations). You could dispatch out any elements from within the hierarchy by criteria such as no representation, or no relevant quantities or properties.
I have added a predefined type output for a revised version of this component for the next build of the plugin.
I’ll have a look again and try to provide a small sample file!
The predefined type option is very much appreciated!
