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
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- 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 |
Connectivity between the continuous segments is not enforced per se to be tangential. Setting "TangentialContinuity" to True means that the current segment shall continue with tangential continuity to the previous one. |
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;