IfcSweptSurface

Natural language names
Oberfläche - Entlang einem Pfad extrudiert
Swept Surface
Surface produite par extrusion d'une courbe le long d'une courbe
Semantic definitions at the entity
Entity definition

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 _Positio_n 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 definitions
#AttributeTypeCardinalityDescription G
1SweptCurveIfcProfileDef The curve to be swept in defining the surface. The curve is defined as a profile within the position coordinate system. X
2PositionIfcAxis2Placement3D? 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.
IFC4 CHANGE  The attribute has been changed to OPTIONAL with upward compatibility for file-based exchange.
X
Inherited definitions from supertypes
Entity inheritance IfcSurfaceOfLinearExtrusion IfcSurfaceOfRevolution IfcSurface IfcGeometricRepresentationItem IfcRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRepresentationItem
LayerAssignmentIfcPresentationLayerAssignment
@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.
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.
X
StyledByItemIfcStyledItem
@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.
IFC2x3 CHANGE  The inverse attribute StyledByItem has been added.
X
IfcGeometricRepresentationItem
IfcSurface
Dim
:=3
IfcDimensionCountThe space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item.
IFC4 CHANGE Derived attribute promoted from subtypes.
X
IfcSweptSurface
1SweptCurveIfcProfileDef The curve to be swept in defining the surface. The curve is defined as a profile within the position coordinate system. X
2PositionIfcAxis2Placement3D? 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.
IFC4 CHANGE  The attribute has been changed to OPTIONAL with upward compatibility for file-based exchange.
X
Formal representations
XML Specification
 <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>
EXPRESS Specification
ENTITY IfcSweptSurface
 ABSTRACT SUPERTYPE OF(ONEOF(IfcSurfaceOfLinearExtrusion, IfcSurfaceOfRevolution))
 SUBTYPE OF (IfcSurface);
  SweptCurve : IfcProfileDef;
  Position : OPTIONAL IfcAxis2Placement3D;
 WHERE
  SweptCurveType : SweptCurve.ProfileType = IfcProfileTypeEnum.Curve;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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