IfcRevolvedAreaSolidTapered

Natural language names
deSich verjüngender Festkörper - durch Rotation
enRevolved Area Solid Tapered
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcRevolvedAreaSolidTaperedADDED
Semantic definitions at the entity
Entity definition

IfcRevolvedAreaSolidTapered is defined by revolving a cross section along a circular arc. The cross section may change along the revolving sweep from the shape of the start cross section into the shape of the end cross section. Corresponding vertices of the start and end cross sections are then connected. The bounded surface may have holes which will sweep into holes in the solid.

The rotation axis is defined by:

The start cross section is defined by SELF\IfcSweptAreaSolid.SweptArea:

The end cross section is defined by EndSweptArea:

The solid is generated by transforming the start cross section into to end cross section. A start face, an end face (each defined by start and end cross sections), and one or more lateral faces. Each lateral face is a ruled surface defined by a pair of corresponding edges of the start and end section. The ruled surfaces are constructed in the cylindrical coordinate space defined by the supertype IfcRevolvedAreaSolid.

HISTORY  New entity in IFC4.

Informal Propositions:

  1. Mirroring within IfcDerivedProfileDef.Operator shall not be used
Attribute definitions
#AttributeTypeCardinalityDescription C
5EndSweptAreaIfcProfileDef[1:1] X
Formal Propositions
RuleDescription
CorrectProfileAssignmentThe SweptArea as start profile and the EndSweptArea as end profile shall be compatible.
Inherited definitions from supertypes
Entity inheritance IfcRevolvedAreaSolid IfcSweptAreaSolid IfcSolidModel IfcGeometricRepresentationItem IfcRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionC
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. 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. X
IfcGeometricRepresentationItem
IfcSolidModel
Dim
:=3
IfcDimensionCount[1:1]The space dimensionality of this class, it is always 3. X
IfcSweptAreaSolid
1SweptAreaIfcProfileDef[1:1] The surface defining the area to be swept. It is given as a profile definition within the xy plane of the position coordinate system.X
2PositionIfcAxis2Placement3D[0:1] Position coordinate system for the resulting swept solid of the sweeping operation. The position coordinate system allows for re-positioning of the swept solid. If not provided, the swept solid remains within the position as determined by the cross section or by the directrix used for the sweeping operation. X
IfcRevolvedAreaSolid
3AxisIfcAxis1Placement[1:1] Axis about which revolution will take place.X
4AngleIfcPlaneAngleMeasure[1:1] The angle through which the sweep will be made. This angle is measured from the plane of the swept area provided by the XY plane of the position coordinate system.X
AxisLine
:=IfcRepresentationItem() || IfcGeometricRepresentationItem () || IfcCurve() || IfcLine(Axis.Location, IfcRepresentationItem() || IfcGeometricRepresentationItem () || IfcVector(Axis.Z,1.0))
IfcLine[1:1]The line of the axis of revolution. X
IfcRevolvedAreaSolidTapered
5EndSweptAreaIfcProfileDef[1:1] X
Formal representations
XSD Specification
 <xs:element name="IfcRevolvedAreaSolidTapered" type="ifc:IfcRevolvedAreaSolidTapered" substitutionGroup="ifc:IfcRevolvedAreaSolid" nillable="true"/>
 <xs:complexType name="IfcRevolvedAreaSolidTapered">
  <xs:complexContent>
   <xs:extension base="ifc:IfcRevolvedAreaSolid">
    <xs:sequence>
     <xs:element name="EndSweptArea" type="ifc:IfcProfileDef" nillable="true"/>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcRevolvedAreaSolidTapered
 SUBTYPE OF (IfcRevolvedAreaSolid);
  EndSweptArea : IfcProfileDef;
 WHERE
  CorrectProfileAssignment : IfcTaperedSweptAreaProfiles(SELF\IfcSweptAreaSolid.SweptArea, SELF.EndSweptArea);
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Link to this page  Link to this page