An IfcConic is a parameterized planar curve.
NOTE Definition according to ISO/CD 10303-42:1992
A conic is a planar curve which could be produced by intersecting a plane with a cone. A conic is defined in terms of its intrinsic geometric properties rather than being described in terms of other geometry. A conic entity always has a placement coordinate system defined by axis2_placement; the parametric representation is defined in terms of this placement coordinate system.
NOTE Entity adapted from conic defined in ISO 10303-42
HISTORY New entity in IFC1.0
|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.|
|1||Position||IfcAxis2Placement||The location and orientation of the conic. Further details of the interpretation of this attribute are given for the individual subtypes."|
ENTITY IfcConic ABSTRACT SUPERTYPE OF (ONEOF (IfcCircle ,IfcEllipse)) SUBTYPE OF (IfcCurve); Position : IfcAxis2Placement; END_ENTITY;