8.9.3.29 IfcCylindricalSurface
8.9.3.29.1 Semantic definition
The cylindrical surface is a surface unbounded in the direction of z. Bounded cylindrical surfaces are defined by using a subtype of IfcBoundedSurface with BasisSurface being a cylindrical surface.
The inherited attributes are interpreted as
- SELF\IfcElementarySurface.Position defines the location and orientation of the cylindrical surface.
- SELF\IfcElementarySurface.Position.Location definesd a point on the axis of the cylindrical surface.
- SELF\IfcElementarySurface.Position.P[3] defines the direction of the axis of the cylindrical surface.
8.9.3.29.2 Entity inheritance
-
- IfcSurface
- IfcAnnotationFillArea
- IfcBooleanResult
- IfcBoundingBox
- IfcCartesianPointList
- IfcCartesianTransformationOperator
- IfcCsgPrimitive3D
- IfcCurve
- IfcDirection
- IfcFaceBasedSurfaceModel
- IfcFillAreaStyleHatching
- IfcFillAreaStyleTiles
- IfcGeometricSet
- IfcHalfSpaceSolid
- IfcLightSource
- IfcPlacement
- IfcPlanarExtent
- IfcPoint
- IfcSectionedSpine
- IfcSegment
- IfcShellBasedSurfaceModel
- IfcSolidModel
- IfcTessellatedItem
- IfcTextLiteral
- IfcVector
8.9.3.29.3 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. |
|
| IfcSurface (1) | |||
| * | Dim | IfcDimensionCount |
This attribute is formally derived. The space dimensionality of IfcSurface. It is always a three-dimensional geometric representation item. |
| IfcElementarySurface (1) | |||
| 1 | Position | IfcAxis2Placement3D |
The position and orientation of the surface. This attribute is used in the definition of the parameterization of the surface. |
| Click to show 4 hidden inherited attributes Click to hide 4 inherited attributes | |||
| IfcCylindricalSurface (1) | |||
| 2 | Radius | IfcPositiveLengthMeasure |
The radius of the cylindrical surface. |
8.9.3.29.4 Formal representation
ENTITY IfcCylindricalSurface
SUBTYPE OF (IfcElementarySurface);
Radius : IfcPositiveLengthMeasure;
END_ENTITY;