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.
Informal Propositions:
IFC4 CHANGE The entity has been deprecated and shall not be used. The entity IfcFacetedBrep shall be used instead.
# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|
1 | FbsmFaces | IfcConnectedFaceSet | S[1:?] | The set of connected face sets comprising the face based surface model. | X |
Dim :=3 | IfcDimensionCount | [1:1] | The space dimensionality of this class, it is always 3. | X |
# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|
IfcRepresentationItem | |||||
LayerAssignment | IfcPresentationLayerAssignment @AssignedItems | 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. | X | |
StyledByItem | IfcStyledItem @Item | 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. | X | |
IfcGeometricRepresentationItem | |||||
IfcFaceBasedSurfaceModel | |||||
1 | FbsmFaces | IfcConnectedFaceSet | S[1:?] | The set of connected face sets comprising the face based surface model. | X |
Dim :=3 | IfcDimensionCount | [1:1] | The space dimensionality of this class, it is always 3. | X |
<xs:element name="IfcFaceBasedSurfaceModel" type="ifc:IfcFaceBasedSurfaceModel" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>
<xs:complexType name="IfcFaceBasedSurfaceModel">
<xs:complexContent>
<xs:extension base="ifc:IfcGeometricRepresentationItem">
<xs:sequence>
<xs:element name="FbsmFaces">
<xs:complexType>
<xs:sequence>
<xs:element ref="ifc:IfcConnectedFaceSet" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcConnectedFaceSet"/>
<xs:attribute ref="ifc:cType" fixed="set"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcFaceBasedSurfaceModel
SUBTYPE OF (IfcGeometricRepresentationItem);
FbsmFaces : SET [1:?] OF IfcConnectedFaceSet;
DERIVE
Dim : IfcDimensionCount := 3;
END_ENTITY;