Geometrische Gruppe - Punkte und Kurven | |

Geometric Curve Set |

The IfcGeometricCurveSet is used for the exchange of shape representation consisting of an collection of (2D or 3D) points and curves only.

NOTE Definition according to ISO/CD 10303-42:1992

A geometric curve set is a collection of two or three dimensional points and curves.

NOTE Entity adapted fromgeometric_curve_setdefined in ISO 10303-42.

HISTORY New entity in IFC2x2.

Rule | Description |
---|---|

NoSurfaces | No surface shall be included in this geometric set. |

# | Attribute | Type | Cardinality | Description | G |
---|---|---|---|---|---|

IfcRepresentationItem | |||||

LayerAssignment | IfcPresentationLayerAssignment @AssignedItems | S[0:1] | 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.
IFC2x3 CHANGE The inverse attribute IFC4 CHANGE The inverse attribute | X | |

StyledByItem | IfcStyledItem @Item | S[0:1] | Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.
IFC2x3 CHANGE The inverse attribute | X | |

IfcGeometricRepresentationItem | |||||

IfcGeometricSet | |||||

1 | Elements | IfcGeometricSetSelect | S[1:?] | 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. | X |

Dim :=Elements[1].Dim | IfcDimensionCount | 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. | X | ||

IfcGeometricCurveSet |

` <xs:element name="IfcGeometricCurveSet" type="ifc:IfcGeometricCurveSet" substitutionGroup="ifc:IfcGeometricSet" nillable="true"/>`

<xs:complexType name="IfcGeometricCurveSet">

<xs:complexContent>

<xs:extension base="ifc:IfcGeometricSet"/>

</xs:complexContent>

</xs:complexType>

```
ENTITY IfcGeometricCurveSet
```

SUBTYPE OF (IfcGeometricSet)**;**

WHERE

NoSurfaces : SIZEOF(QUERY(Temp <* SELF\IfcGeometricSet.Elements |

'IFCGEOMETRYRESOURCE.IfcSurface' IN TYPEOF(Temp))) = 0;

END_ENTITY;