The IfcGeometricCurveSet is used for the exchange of shape representation consisting of an collection of (2D or 3D) points and curves only.
NOTE Definition according to ISO/CD 10303-42:1992
A geometric curve set is a collection of two or three dimensional points and curves.
NOTE Entity adapted from geometric_curve_set defined in ISO 10303-42.
HISTORY New entity in IFC2x2.
No surface shall be included in this geometric set.
|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.
|1||Elements||SET [1:?] OF IfcGeometricSetSelect||The geometric elements which make up the geometric set, these may be points, curves or surfaces; but are required to be of the same coordinate space dimensionality.|
|Dim||INVALID||The space dimensionality of this class, it is identical to the first element in the set. A where rule ensures that all elements have the same dimensionality.|
ENTITY IfcGeometricCurveSet SUBTYPE OF (IfcGeometricSet); WHERE NoSurfaces : SIZEOF(QUERY(Temp <* SELF\IfcGeometricSet.Elements | 'IFC4X3_DEV_a1492713.IFCSURFACE' IN TYPEOF(Temp))) = 0; END_ENTITY;