IfcSweptDiskSolidPolygonal

Natural language names
deFestkörper - Entlang einer Polylinie extrudierte Kreisscheibe
enSwept Disk Solid Polygonal
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcSweptDiskSolidPolygonalADDED
Semantic definitions at the entity
Entity definition

The IfcSweptDiskSolidPolygonal is a IfcSweptDiskSolid where the Directrix is restricted to be provided by an IfcPolyline only. An optional FilletRadius attribute can be asserted, it is then applied as a fillet to all transitions between the segments of the IfcPolyline.

HISTORY  New entity in IFC4.

Informal Propositions:

  1. The FilletRadius, if provided, has to be smaller then or equal to the length of the start and end segment of the IfcPolyline, and smaller then or equal to one half of the lenght of the shortest inner segment.
Attribute definitions
#AttributeTypeCardinalityDescription C
6FilletRadiusIfcPositiveLengthMeasure[0:1] The fillet that is equally applied to all transitions between the segments of the IfcPolyline, providing the geometric representation for the Directrix. If omited, no fillet is applied to the segments. X
Formal Propositions
RuleDescription
CorrectRadiiIf a FilletRadius is given, it has to be greater or equal to the Radius of the disk.
DirectrixIsPolylineThe Directrix shall be of type IfcPolyline.
Inherited definitions from supertypes
Entity inheritance IfcSweptDiskSolid 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
IfcSweptDiskSolid
1DirectrixIfcCurve[1:1] The curve used to define the sweeping operation. The solid is generated by sweeping a circular disk along the Directrix.X
2RadiusIfcPositiveLengthMeasure[1:1] The Radius of the circular disk to be swept along the directrix. Denotes the outer radius, if an InnerRadius is applied.X
3InnerRadiusIfcPositiveLengthMeasure[0:1] This attribute is optional, if present it defines the radius of a circular hole in the centre of the disk.X
4StartParamIfcParameterValue[0:1] The parameter value on the Directrix at which the sweeping operation commences. If no value is provided the start of the sweeping operation is at the start of the Directrix.. X
5EndParamIfcParameterValue[0:1] The parameter value on the Directrix at which the sweeping operation ends. If no value is provided the end of the sweeping operation is at the end of the Directrix.. X
IfcSweptDiskSolidPolygonal
6FilletRadiusIfcPositiveLengthMeasure[0:1] The fillet that is equally applied to all transitions between the segments of the IfcPolyline, providing the geometric representation for the Directrix. If omited, no fillet is applied to the segments. X
Formal representations
XSD Specification
 <xs:element name="IfcSweptDiskSolidPolygonal" type="ifc:IfcSweptDiskSolidPolygonal" substitutionGroup="ifc:IfcSweptDiskSolid" nillable="true"/>
 <xs:complexType name="IfcSweptDiskSolidPolygonal">
  <xs:complexContent>
   <xs:extension base="ifc:IfcSweptDiskSolid">
    <xs:attribute name="FilletRadius" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcSweptDiskSolidPolygonal
 SUBTYPE OF (IfcSweptDiskSolid);
  FilletRadius : OPTIONAL IfcPositiveLengthMeasure;
 WHERE
  CorrectRadii : NOT(EXISTS(FilletRadius)) OR (FilletRadius >= SELF\IfcSweptDiskSolid.Radius);
  DirectrixIsPolyline : 'IFCGEOMETRYRESOURCE.IFCPOLYLINE' IN TYPEOF(SELF\IfcSweptDiskSolid.Directrix);
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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