BlenderBIM : IfcMaterials on parametric IfcWindows

R by RaphaëlVouilloz on 8 Jun 2023, edited 23 Feb 2024 # +1 votes

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).

G by Gorgious on 12 Jun 2023 #

+1 Submitted a feature request over on github.

https://github.com/IfcOpenShell/IfcOpenShell/issues/3295

R by RaphaëlVouilloz on 13 Jun 2023 #

Thanks!

R by RaphaëlVouilloz on 23 Feb 2024, edited 23 Feb 2024 # +2 votes

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?