The IfcFacetedBrepWithVoids is a specialization of a faceted 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.
- Each void shell shall be disjoint from the outer shell and from every other void shell
- Each void shell shall be enclosed within the outer shell but not within any other void shell. In particular the outer shell is not in the set of void shells
- Each shell in the IfcManifoldSolidBrep shall be referenced only once.
- All the bounding loops of all the faces of all the shells in the IfcFacetedBrep shall be of type IfcPolyLoop.
|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.
|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.
This attribute is formally derived.
The space dimensionality of this class, it is always 3.
A closed shell defining the exterior boundary of the solid. The shell normal shall point away from the interior of the solid.
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|2||Voids||SET [1:?] OF IfcClosedShell||
Set of closed shells defining voids within the solid.
ENTITY IfcFacetedBrepWithVoids SUBTYPE OF (IfcFacetedBrep); Voids : SET [1:?] OF IfcClosedShell; END_ENTITY;