Oberfläche - Entlang einem Pfad extrudiert | |
Swept Surface | |
Surface produite par extrusion d'une courbe le long d'une courbe |
An IfcSweptSurface is a surface defined by sweeping a curve. The swept surface is defined by a open or closed curve, represented by a subtype if IfcProfileDef, that is provided as a two-dimensional curve on an implicit plane, and by the sweeping operation.
The optional Position coordinate system allows for re-positioning the resulting swept surface relative to the object coordinate system.
NOTE Definition according to ISO/CD 10303-42:1992
A swept surface is one that is constructed by sweeping a curve along another curve.
NOTE Entity adapted from swept_surface defined in ISO 10303-42.
HISTORY New entity in IFC2x.
IFC4 CHANGE The attribute Position has been changed to OPTIONAL with upward compatibility for file-based exchange.
# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|
1 | SweptCurve | IfcProfileDef | [1:1] | The curve to be swept in defining the surface. The curve is defined as a profile within the position coordinate system. | X |
2 | Position | IfcAxis2Placement3D | [0:1] | Position coordinate system for the swept surface, provided by a profile definition within the XY plane of the Position coordinates. If not provided, the position of the profile being swept is determined by the object coordinate system. In this case, the swept surface is not repositioned. | 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 | |||||
IfcSurface | |||||
Dim :=3 | IfcDimensionCount | [1:1] | The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item. | X | |
IfcSweptSurface | |||||
1 | SweptCurve | IfcProfileDef | [1:1] | The curve to be swept in defining the surface. The curve is defined as a profile within the position coordinate system. | X |
2 | Position | IfcAxis2Placement3D | [0:1] | Position coordinate system for the swept surface, provided by a profile definition within the XY plane of the Position coordinates. If not provided, the position of the profile being swept is determined by the object coordinate system. In this case, the swept surface is not repositioned. | X |
<xs:element name="IfcSweptSurface" type="ifc:IfcSweptSurface" abstract="true" substitutionGroup="ifc:IfcSurface" nillable="true"/>
<xs:complexType name="IfcSweptSurface" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcSurface">
<xs:sequence>
<xs:element name="SweptCurve" type="ifc:IfcProfileDef" nillable="true"/>
<xs:element name="Position" type="ifc:IfcAxis2Placement3D" nillable="true" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcSweptSurface
ABSTRACT SUPERTYPE OF(ONEOF(IfcSurfaceOfLinearExtrusion, IfcSurfaceOfRevolution))
SUBTYPE OF (IfcSurface);
SweptCurve : IfcProfileDef;
Position : OPTIONAL IfcAxis2Placement3D;
WHERE
SweptCurveType : SweptCurve.ProfileType = IfcProfileTypeEnum.Curve;
END_ENTITY;