A type of spiral curve for which the curvature change is dependent on the sine function. It is also known as the Klein curve.
The curvature is defined as:
K = K0 (s LinearTerm - 1/2&pi sin2&pi/SineTerm)
|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.
|Dim||INVALID||The space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve.|
ENTITY IfcSine SUBTYPE OF (IfcSpiral); SineTerm : IfcLengthMeasure; LinearTerm : OPTIONAL IfcLengthMeasure; ConstantTerm : OPTIONAL IfcLengthMeasure; END_ENTITY;