8.8.3.44 IfcSweptDiskSolidPolygonal

8.8.3.44.1 Semantic definition

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

Informal Propositions

The FilletRadius, if provided, has to be smaller than or equal to the length of the start and end segment of the IfcPolyline, and smaller than or equal to one half of the length of the shortest inner segment.

8.8.3.44.2 Entity inheritance

8.8.3.44.3 Attributes

#	Attribute	Type	Description
IfcRepresentationItem (2)
	LayerAssignment	SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems	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.
	StyledByItem	SET [0:1] OF IfcStyledItem FOR Item	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.
IfcSolidModel (1)
*	Dim	IfcDimensionCount	This attribute is formally derived. `3` The space dimensionality of this class, it is always 3.
IfcSweptDiskSolid (5)
1	Directrix	IfcCurve	The curve used to define the sweeping operation. The solid is generated by sweeping a circular disk along the Directrix.
2	Radius	IfcPositiveLengthMeasure	The Radius of the circular disk to be swept along the directrix. Denotes the outer radius, if an InnerRadius is applied.
3	InnerRadius	OPTIONAL IfcPositiveLengthMeasure	This attribute is optional, if present it defines the radius of a circular hole in the centre of the disk.
4	StartParam	OPTIONAL IfcParameterValue	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. IFC4-CHANGE The attribute has been changed to OPTIONAL with upward compatibility for file-based exchange.
5	EndParam	OPTIONAL IfcParameterValue	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. IFC4-CHANGE The attribute has been changed to OPTIONAL with upward compatibility for file-based exchange.
Click to show 8 hidden inherited attributes
IfcSweptDiskSolidPolygonal (1)
6	FilletRadius	OPTIONAL IfcNonNegativeLengthMeasure	The fillet that is equally applied to all transitions between the segments of the IfcPolyline, providing the geometric representation for the Directrix. If omitted, no fillet is applied to the segments.

Table 8.8.3.44.A

8.8.3.44.4 Formal propositions

Name Description

CorrectRadii

If a FilletRadius is given, it has to be greater or equal to the Radius of the disk.

NOT(EXISTS(FilletRadius)) OR (FilletRadius >= SELF\IfcSweptDiskSolid.Radius)

DirectrixIsPolyline

The Directrix shall be of type IfcIndexedPolyCurve with no Segments, or of type IfcPolyline.

 ('IFC4X3_DEV_738df036.IFCPOLYLINE' IN TYPEOF(SELF\IfcSweptDiskSolid.Directrix)) OR
(('IFC4X3_DEV_738df036.IFCINDEXEDPOLYCURVE' IN TYPEOF(SELF\IfcSweptDiskSolid.Directrix)) AND NOT(EXISTS(SELF\IfcSweptDiskSolid.Directrix\IfcIndexedPolyCurve.Segments)))

Table 8.8.3.44.B

8.8.3.44.5 Formal representation

 ENTITY IfcSweptDiskSolidPolygonal
 SUBTYPE OF (IfcSweptDiskSolid);
	FilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
 WHERE
	CorrectRadii : NOT(EXISTS(FilletRadius)) OR (FilletRadius >= SELF\IfcSweptDiskSolid.Radius);
	DirectrixIsPolyline : ('IFC4X3_DEV_738df036.IFCPOLYLINE' IN TYPEOF(SELF\IfcSweptDiskSolid.Directrix)) OR
(('IFC4X3_DEV_738df036.IFCINDEXEDPOLYCURVE' IN TYPEOF(SELF\IfcSweptDiskSolid.Directrix)) AND NOT(EXISTS(SELF\IfcSweptDiskSolid.Directrix\IfcIndexedPolyCurve.Segments)));
END_ENTITY;

8.8.3.44.6 References

IfcSweptDiskSolid

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Last change: Fix various typos Found via `codespell -q 3 -S "./schemas,./reference_schemas" -L cant,co-ordinate,complies,nd,tread,trough,unkown,uupper,wallthickness` by luzpaz on 10/29/2024, 12:09:51 PM

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8.8.3.44.7 Changelog

8.8.3.44.7.1 IFC4

New resource

8.8.3.44.7.2 IFC4.3_DEV_738df036

attribute FilletRadius type, Changed from "IfcPositiveLengthMeasure" to "IfcNonNegativeLengthMeasure"
where rule DirectrixIsPolyline definition, Changed from "(ifcpolyline in typeof(self\IfcSweptDiskSolid.Directrix)) or ((ifcindexedpolycurve in typeof(self\IfcSweptDiskSolid.Directrix)) and not(exists(self\IfcSweptDiskSolid.Directrix.Segments)))" to "(ifcpolyline in typeof(self\IfcSweptDiskSolid.Directrix)) or ((ifcindexedpolycurve in typeof(self\IfcSweptDiskSolid.Directrix)) and not(exists(self\IfcSweptDiskSolid.Directrix\IfcIndexedPolyCurve.Segments)))"

	ENTITY IfcSweptDiskSolidPolygonal
	SUBTYPE OF (IfcSweptDiskSolid);
	FilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
	WHERE
	CorrectRadii : NOT(EXISTS(FilletRadius)) OR (FilletRadius >= SELF\IfcSweptDiskSolid.Radius);
	DirectrixIsPolyline : ('IFC4X3_DEV_738df036.IFCPOLYLINE' IN TYPEOF(SELF\IfcSweptDiskSolid.Directrix)) OR
	(('IFC4X3_DEV_738df036.IFCINDEXEDPOLYCURVE' IN TYPEOF(SELF\IfcSweptDiskSolid.Directrix)) AND NOT(EXISTS(SELF\IfcSweptDiskSolid.Directrix\IfcIndexedPolyCurve.Segments)));
	END_ENTITY;