The IfcAdvancedBrepWithVoids is a specialization of an advanced B-rep which contains one or more voids in its interior. The voids are represented as closed shells which are defined so that the shell normal point into the void.
NOTE Entity adapted from advanced_brep_shape_representation defined in ISO 10303-42.
HISTORY New entity in IFC4
|LayerAssignment||SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems||Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.|
> IFC2x3 CHANGE The inverse attribute LayerAssignments has been added.
> IFC4 CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
|StyledByItem||SET [0:1] OF IfcStyledItem FOR Item||Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.|
> IFC2x3 CHANGE The inverse attribute StyledByItem has been added.
|Dim||INVALID||The space dimensionality of this class, it is always 3.|
|1||Outer||IfcClosedShell||A closed shell defining the exterior boundary of the solid. The shell normal shall point away from the interior of the solid.|
|2||Voids||SET [1:?] OF IfcClosedShell|
ENTITY IfcAdvancedBrepWithVoids SUBTYPE OF (IfcAdvancedBrep); Voids : SET [1:?] OF IfcClosedShell; WHERE VoidsHaveAdvancedFaces : SIZEOF (QUERY (Vsh <* Voids | SIZEOF (QUERY (Afs <* Vsh.CfsFaces | (NOT ('IFC4X3_DEV_a1492713.IFCADVANCEDFACE' IN TYPEOF(Afs))) )) = 0 )) = 0; END_ENTITY;