8.8.3.21 IfcGeometricCurveSet
8.8.3.21.1 Semantic definition
The IfcGeometricCurveSet is used for the exchange of shape representation consisting of an collection of (2D or 3D) points and curves only.
8.8.3.21.2 Entity inheritance
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- IfcGeometricSet
- IfcAnnotationFillArea
- IfcBooleanResult
- IfcBoundingBox
- IfcCartesianPointList
- IfcCartesianTransformationOperator
- IfcCsgPrimitive3D
- IfcCurve
- IfcDirection
- IfcFaceBasedSurfaceModel
- IfcFillAreaStyleHatching
- IfcFillAreaStyleTiles
- IfcHalfSpaceSolid
- IfcLightSource
- IfcPlacement
- IfcPlanarExtent
- IfcPoint
- IfcSectionedSpine
- IfcSegment
- IfcShellBasedSurfaceModel
- IfcSolidModel
- IfcSurface
- IfcTessellatedItem
- IfcTextLiteral
- IfcVector
8.8.3.21.3 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 | |||
| IfcGeometricSet (2) | |||
| 1 | Elements | SET [1:?] OF IfcGeometricSetSelect |
The geometric elements which make up the geometric set, these may be points, curves or surfaces; but are required to be of the same coordinate space dimensionality. |
| * | Dim | IfcDimensionCount |
This attribute is formally derived. The space dimensionality of this class, it is identical to the first element in the set. A where rule ensures that all elements have the same dimensionality. |
8.8.3.21.4 Formal propositions
| Name | Description |
|---|---|
| NoSurfaces |
No surface shall be included in this geometric set. |
|
|
8.8.3.21.5 Examples
8.8.3.21.6 Formal representation
ENTITY IfcGeometricCurveSet
SUBTYPE OF (IfcGeometricSet);
WHERE
NoSurfaces : SIZEOF(QUERY(Temp <* SELF\IfcGeometricSet.Elements |
'IFC4X3_DEV_c85b862.IFCSURFACE' IN TYPEOF(Temp))) = 0;
END_ENTITY;