8.9.3.50 IfcPointOnSurface
8.9.3.50.1 Semantic definition
The IfcPointOnSurface is a point defined by two parameter value of its defining surface.
Informal Propositions
- The parametric values specified for u and v shall not be outside the parametric range of the basis surface.
8.9.3.50.2 Entity inheritance
-
- IfcPoint
- IfcAnnotationFillArea
- IfcBooleanResult
- IfcBoundingBox
- IfcCartesianPointList
- IfcCartesianTransformationOperator
- IfcCsgPrimitive3D
- IfcCurve
- IfcDirection
- IfcFaceBasedSurfaceModel
- IfcFillAreaStyleHatching
- IfcFillAreaStyleTiles
- IfcGeometricSet
- IfcHalfSpaceSolid
- IfcLightSource
- IfcPlacement
- IfcPlanarExtent
- IfcSectionedSpine
- IfcSegment
- IfcShellBasedSurfaceModel
- IfcSolidModel
- IfcSurface
- IfcTessellatedItem
- IfcTextLiteral
- IfcVector
8.9.3.50.3 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. |
|
| IfcPoint (1) | |||
| * | Dim | IfcDimensionCount |
This attribute is formally derived. The space dimensionality of this abstract class, handled by a function specific for concrete subtypes. Determined by the number of coordinate components in case of IfcCartesianPoint or by the dimensionality of the basis curve or surface in other cases. |
| Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes | |||
| IfcPointOnSurface (3) | |||
| 1 | BasisSurface | IfcSurface |
The surface to which the parameter values relate. |
| 2 | PointParameterU | IfcParameterValue |
The first parameter value of the point location. |
| 3 | PointParameterV | IfcParameterValue |
The second parameter value of the point location. |
8.9.3.50.4 Formal representation
ENTITY IfcPointOnSurface
SUBTYPE OF (IfcPoint);
BasisSurface : IfcSurface;
PointParameterU : IfcParameterValue;
PointParameterV : IfcParameterValue;
END_ENTITY;