8.9.3.61 IfcSegment
ABSTRACT This definition may not be instantiated
8.9.3.61.1 Semantic definition
Definition of a curve segment with a trimming mechanism built in with a StartPlacement (first point) and SegmentLength (second point).
8.9.3.61.2 Entity inheritance
-
- IfcSegment
- IfcAnnotationFillArea
- IfcBooleanResult
- IfcBoundingBox
- IfcCartesianPointList
- IfcCartesianTransformationOperator
- IfcCsgPrimitive3D
- IfcCurve
- IfcDirection
- IfcFaceBasedSurfaceModel
- IfcFillAreaStyleHatching
- IfcFillAreaStyleTiles
- IfcGeometricSet
- IfcHalfSpaceSolid
- IfcLightSource
- IfcPlacement
- IfcPlanarExtent
- IfcPoint
- IfcSectionedSpine
- IfcShellBasedSurfaceModel
- IfcSolidModel
- IfcSurface
- IfcTessellatedItem
- IfcTextLiteral
- IfcVector
8.9.3.61.3 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 | |||
| IfcSegment (3) | |||
| 1 | Transition | IfcTransitionCode |
The state of transition (i.e., geometric continuity from the last point of this segment to the first point of the next segment) in IfcCompositeCurve and subtypes. |
| 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. 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). |
8.9.3.61.4 Formal representation
ENTITY IfcSegment
ABSTRACT SUPERTYPE OF (ONEOF
(IfcCompositeCurveSegment
,IfcCurveSegment))
SUBTYPE OF (IfcGeometricRepresentationItem);
Transition : IfcTransitionCode;
DERIVE
Dim : IfcDimensionCount := IfcSegmentDim(SELF);
INVERSE
UsingCurves : SET [1:?] OF IfcCompositeCurve FOR Segments;
END_ENTITY;
