220.127.116.11.1 Semantic definition
The IfcFacetedBrep is a manifold solid brep with the restriction that all faces are planar and bounded polygons.
The faceted B-rep has been introduced in order to support the larger number of systems that allow boundary type solid representations with planar surfaces only.
- All the bounding loops of all the faces of all the shells in the IfcFacetedBrep shall be of type IfcPolyLoop.
- All vertices shall be referenced by all polyloops, sharing the vertex. I.e., each Cartesian point shall be references by at least three polyloops.
18.104.22.168.2 Entity inheritance
|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.
|Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes|
A closed shell defining the exterior boundary of the solid. The shell normal shall point away from the interior of the solid.
22.214.171.124.5 Formal representation
ENTITY IfcFacetedBrep SUPERTYPE OF (ONEOF (IfcFacetedBrepWithVoids)) SUBTYPE OF (IfcManifoldSolidBrep); END_ENTITY;