|Flächenmodell (basierend auf Einzelflächen)|
|Face Based Surface Model|
The IfcFaceBasedSurfaceModel represents the a shape by connected face sets. The connected faces have a dimensionality 2 and are placed in a coordinate space of dimensionality 3.
NOTE Definition according to ISO/CD 10303-42:1992
A face based surface model is described by a set of connected face sets of dimensionality 2. The connected face sets shall not intersect except at edges and vertices, except that a face in one connected face set may overlap a face in another connected face set, provided the face boundaries are identical. There shall be at least one connected face set.
A connected face set may exist independently of a surface model.
NOTE Entity adapted from face_based_surface_model defined in ISO 10303-42.
HISTORY New entity in IFC2x.
IFC4 CHANGE The entity has been deprecated and shall not be used. The entity IfcFacetedBrep shall be used instead.
|S[0:1]||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.
|S[0:1]||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.
|1||FbsmFaces||IfcConnectedFaceSet||S[1:?]||The set of connected face sets comprising the face based surface model.||X|
|IfcDimensionCount||The space dimensionality of this class, it is always 3.||X|
<xs:element name="IfcFaceBasedSurfaceModel" type="ifc:IfcFaceBasedSurfaceModel" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>
<xs:element ref="ifc:IfcConnectedFaceSet" maxOccurs="unbounded"/>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcConnectedFaceSet"/>
<xs:attribute ref="ifc:cType" fixed="set"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>