8.9.3.24 IfcCosineSpiral
8.9.3.24.1 Semantic definition
A type of spiral curve for which the curvature change is dependent on the cosine function.
The curvature is defined as:
K = K0/2 (Constant - cos&pi s/CosineTerm)
8.9.3.24.2 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
8.9.3.24.3 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. |
|
IfcCurve (1) | |||
* | Dim | IfcDimensionCount |
This attribute is formally derived.
The space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve. |
IfcSpiral (1) | |||
1 | Position | IfcAxis2Placement |
No description available. |
Click to show 4 hidden inherited attributes Click to hide 4 inherited attributes | |||
IfcCosineSpiral (2) | |||
2 | CosineTerm | IfcLengthMeasure |
No description available. |
3 | ConstantTerm | OPTIONAL IfcLengthMeasure |
No description available. |
8.9.3.24.4 Formal representation
ENTITY IfcCosineSpiral
SUBTYPE OF (IfcSpiral);
CosineTerm : IfcLengthMeasure;
ConstantTerm : OPTIONAL IfcLengthMeasure;
END_ENTITY;