8.9.3.25 IfcCurve
ABSTRACT This definition may not be instantiated
8.9.3.25.1 Semantic definition
An IfcCurve is a curve in two-dimensional or three-dimensional space. It includes definitions for bounded and unbounded curves.
Informal Propositions
- A curve shall be arcwise connected
- A curve shall have an arc length greater than zero.
8.9.3.25.2 Entity inheritance
-
- IfcCurve
- IfcAnnotationFillArea
- IfcBooleanResult
- IfcBoundingBox
- IfcCartesianPointList
- IfcCartesianTransformationOperator
- IfcCsgPrimitive3D
- IfcDirection
- IfcFaceBasedSurfaceModel
- IfcFillAreaStyleHatching
- IfcFillAreaStyleTiles
- IfcGeometricSet
- IfcHalfSpaceSolid
- IfcLightSource
- IfcPlacement
- IfcPlanarExtent
- IfcPoint
- IfcSectionedSpine
- IfcSegment
- IfcShellBasedSurfaceModel
- IfcSolidModel
- IfcSurface
- IfcTessellatedItem
- IfcTextLiteral
- IfcVector
8.9.3.25.3 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. |
|
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. |
|
Click to show 2 hidden inherited attributes Click to hide 2 inherited attributes | |||
IfcCurve (1) | |||
* | Dim | IfcDimensionCount |
This attribute is formally derived.
The space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve. |
8.9.3.25.4 Formal representation
ENTITY IfcCurve
ABSTRACT SUPERTYPE OF (ONEOF
(IfcBoundedCurve
,IfcConic
,IfcLine
,IfcOffsetCurve
,IfcPcurve
,IfcPolynomialCurve
,IfcSpiral
,IfcSurfaceCurve))
SUBTYPE OF (IfcGeometricRepresentationItem);
DERIVE
Dim : IfcDimensionCount := IfcCurveDim(SELF);
END_ENTITY;
8.9.3.25.5 References
- IfcAnnotationFillArea
- IfcArbitraryClosedProfileDef
- IfcArbitraryProfileDefWithVoids
- IfcBoundedCurve
- IfcCompositeCurveSegment
- IfcConic
- IfcCurveBoundedPlane
- IfcCurveDim
- IfcCurveSegment
- IfcDirectrixCurveSweptAreaSolid
- IfcEdgeCurve
- IfcGeometricRepresentationItem
- IfcGeometricSetSelect
- IfcGridAxis
- IfcLine
- IfcOffsetCurve
- IfcPcurve
- IfcPointByDistanceExpression
- IfcPointOnCurve
- IfcPolynomialCurve
- IfcRevolvedAreaSolid
- IfcSectionedSolid
- IfcSectionedSurface
- IfcShapeRepresentationTypes
- IfcSpiral
- IfcSurfaceCurve
- IfcSurfaceOfRevolution
- IfcSweptDiskSolid
- IfcTrimmedCurve