How to associate IfcManifoldSolidBrep with IFCWall

Developers
1

Hi,
I read through the IFCWall spec and would like to know how to export a manifold solid brep into IFCWall type without explicitly specific parameters for a wall object (Height, Width, Length…)?

I could export the manifold solid brep object into IfcManifoldSolidBrep object, then is there any way to associate the IfcManifoldSolidBrep with an IFCWall object?

Thank you in advance!

2

those type of questions are answered by the “fundamental concepts” of the IFC specification. They provide you with a path from the elements (e.g. wall, beam, air outlet) to the associated objects (material, geometry, properties, etc.)

for IFC4, see https://standards.buildingsmart.org/IFC/RELEASE/IFC4/ADD2_TC1/HTML/link/chapter-4.htm

in particular for manifold breps:

faceted breps:
https://standards.buildingsmart.org/IFC/RELEASE/IFC4/ADD2_TC1/HTML/link/body-brep-geometry.htm

3

Thank you TLiebich. I digested the link a little bit so take a while to feedback. The information is very helpful to me. From my understanding if the IFCWall want associate with a manifold solid brep, the brep must be surface type (i.e. faceted breps). If I want export a solid brep with a wall, then parameters definitions have to be provided (via IfcExtrudedAreaSolid object).

Does my understanding sounds right?