8.9.3.56 IfcReparametrisedCompositeCurveSegment

8.9.3.56.1 Semantic definition

The IfcReparametrisedCompositeCurveSegment is geometrically identical to a IfcCompositeCurveSegment but with the additional capability of reparametrization.

If t~0~ ≤ t ≤ t~1~ is the parameter range of ParentCurve, the new parameter . for the reparametrised composite curve segment is given by the equation:

if SameSense = TRUE; or by the equation:
Figure 8.9.3.56.A

if SameSense = FALSE;
Figure 8.9.3.56.B

8.9.3.56.2 Entity inheritance

8.9.3.56.3 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.
IfcSegment (3)
1	Transition	IfcTransitionCode	Connectivity between the continuous segments is not enforced per se to be tangential. Setting "TangentialContinuity" to True means that the current segment shall continue with tangential continuity to the previous one.
	UsingCurves	SET [1:?] OF IfcCompositeCurve FOR Segments	The set of composite curves which use this composite curve segment as a segment. This set shall not be empty.
*	Dim	IfcDimensionCount	This attribute is formally derived. `IfcSegmentDim(SELF)` The space dimensionality of this abstract class, handled by a function specific for concrete subtypes which returns the dimensionality of the ParentCurve attribute (defined on both subtypes).
IfcCompositeCurveSegment (2)
2	SameSense	IfcBoolean	An indicator of whether or not the sense of the segment agrees with, or opposes, that of the parent curve. If SameSense is false, the point with highest parameter value is taken as the first point of the segment. NOTE If the datatype of ParentCurve is IfcTrimmedCurve, the value of SameSense overrides the value of IfcTrimmedCurve.SenseAgreement
3	ParentCurve	IfcCurve	The bounded curve which defines the geometry of the segment.
Click to show 7 hidden inherited attributes
IfcReparametrisedCompositeCurveSegment (1)
4	ParamLength	IfcParameterValue	No description available.

Table 8.9.3.56.C

8.9.3.56.4 Formal propositions

Name	Description
PositiveLengthParameter	The ParamLength shall be greater than zero.
`ParamLength > 0.0`

Table 8.9.3.56.D

8.9.3.56.5 Formal representation

 ENTITY IfcReparametrisedCompositeCurveSegment
 SUBTYPE OF (IfcCompositeCurveSegment);
	ParamLength : IfcParameterValue;
 WHERE
	PositiveLengthParameter : ParamLength > 0.0;
END_ENTITY;

8.9.3.56.6 References

IfcCompositeCurveSegment

8.9.3.56 IfcReparametrisedCompositeCurveSegment

8.9.3.56.1 Semantic definition

8.9.3.56.2 Entity inheritance

8.9.3.56.3 Attributes

8.9.3.56.4 Formal propositions

8.9.3.56.5 Formal representation

8.9.3.56.6 References

8.9.3.56.7 Changelog

8.9.3.56.7.1 IFC4

	ENTITY IfcReparametrisedCompositeCurveSegment
	SUBTYPE OF (IfcCompositeCurveSegment);
	ParamLength : IfcParameterValue;
	WHERE
	PositiveLengthParameter : ParamLength > 0.0;
	END_ENTITY;