8.9.3.37 IfcLine
AbV ⓘ
8.9.3.37.1 Semantic definition
The IfcLine is an unbounded line parameterized by an IfcCartesianPoint and an IfcVector. The magnitude of the IfcVector affects the parameterization of the line, but it does not bound the line.

P = Pnt V = Dir λ(u) = P + uV and the parametric range is: -∞ < u < ∞
8.9.3.37.2 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
8.9.3.37.3 Attributes
# | Attribute | Type | Description |
---|---|---|---|
IfcRepresentationItem (2) | |||
IfcCurve (1) | |||
Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes | |||
IfcLine (2) | |||
1 | Pnt | IfcCartesianPoint |
The location of the IfcLine. |
2 | Dir | IfcVector |
The direction of the IfcLine, the magnitude and units of Dir affect the parameterization of the line. |
8.9.3.37.4 Formal propositions
Name | Description |
---|---|
SameDim |
The dimensionality of the Pnt, provided by IfcCartesianPoint, shall be the same as the dimensionality of the Dir, provided by IfcVector. |
|
8.9.3.37.5 Examples
8.9.3.37.6 Formal representation
ENTITY IfcLine SUBTYPE OF (IfcCurve); Pnt : IfcCartesianPoint; Dir : IfcVector; WHERE SameDim : Dir.Dim = Pnt.Dim; END_ENTITY;