BlenderBIM : IfcMaterials on parametric IfcWindows

RaphaëlVouilloz

Hi,
I've just tried parametric IfcWindows, it's great!

How can I assign materials?
In Tessellations, I do it in Edit mode (btw it's great that we can even give transparency to the glazing, thanks).

Gorgious

+1 Submitted a feature request over on github.
https://github.com/IfcOpenShell/IfcOpenShell/issues/3295

RaphaëlVouilloz

Thanks!

RaphaëlVouilloz

Hi,
I'm playing with this feature request, trying to hack an ifc created in BlenderBIM. I add these few lines:

#641=IFCRELASSOCIATESMATERIAL('057L7ffhX7qwJ_QeoTevZa',$,$,$,(#375),#642);
#642=IFCMATERIALCONSTITUENTSET($,$,(#643,#644,#645));
#643=IFCMATERIALCONSTITUENT('Lining',$,#66,$,$);
#644=IFCMATERIALCONSTITUENT('Framing',$,#97,$,$);
#645=IFCMATERIALCONSTITUENT('Glazing',$,#97,$,$);

But the entire parametric window always takes the value of Lining, regardless of the material assigned to Framing and Glazing:

I've taken these names here : https://standards.buildingsmart.org/IFC/RELEASE/IFC4_3/HTML/lexical/IfcWindowType.htm#6.1.3.45.3-Attributes

The following keywords for IfcMaterialConstituentSet.MaterialConstituents[n].Name shall be used:
'Lining' - to indicate that the material constituent applies to to the window lining
'Framing' - to indicate that the material constituent applies to to the window panels, if not provided, the 'Lining' material information applied to panels as well
'Glazing' - to indicate that the material constituent applies to to the glazing part

Am I missing something, or does this require development in IfcOpenShell?