Kartesischer Punkt | |

Cartesian Point | |

Point cartésien |

An IfcCartesianPoint defines a point by coordinates in an orthogonal, right-handed Cartesian coordinate system. For the purpose of this specification only two and three dimensional Cartesian points are used.

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

A cartesian_point is a point defined by its coordinates in a rectangular Cartesian coordinate system, or in a parameter space. The entity is defined in a one, two or three-dimensional space as determined by the number of coordinates in the list. Depending upon the geometric representation context in which the point is used the names of the coordinates may be (x,y,z), or (u,v), or any other chosen values.

NOTE Entity adapted fromcartesian_pointdefined in ISO 10303-42

HISTORY New entity in IFC1.0

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

1 | Coordinates | IfcLengthMeasure | L[1:3] | The first, second, and third coordinate of the point location. If placed in a two or three dimensional rectangular Cartesian coordinate system, Coordinates[1] is the X coordinate, Coordinates[2] is the Y coordinate, and Coordinates[3] is the Z coordinate. | X |

Dim :=HIINDEX(Coordinates) | IfcDimensionCount | The space dimensionality of this class, determined by the number of coordinates in the List of Coordinates. | X |

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

CP2Dor3D | Only two or three dimensional points are in scope. |

# | 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 | |||||

IfcPoint | |||||

IfcCartesianPoint | |||||

1 | Coordinates | IfcLengthMeasure | L[1:3] | The first, second, and third coordinate of the point location. If placed in a two or three dimensional rectangular Cartesian coordinate system, Coordinates[1] is the X coordinate, Coordinates[2] is the Y coordinate, and Coordinates[3] is the Z coordinate. | X |

Dim :=HIINDEX(Coordinates) | IfcDimensionCount | The space dimensionality of this class, determined by the number of coordinates in the List of Coordinates. | X |

` <xs:element name="IfcCartesianPoint" type="ifc:IfcCartesianPoint" substitutionGroup="ifc:IfcPoint" nillable="true"/>`

<xs:complexType name="IfcCartesianPoint">

<xs:complexContent>

<xs:extension base="ifc:IfcPoint">

<xs:attribute name="Coordinates" use="optional">

<xs:simpleType>

<xs:restriction>

<xs:simpleType>

<xs:list itemType="ifc:IfcLengthMeasure"/>

</xs:simpleType>

<xs:maxLength value="3"/>

</xs:restriction>

</xs:simpleType>

</xs:attribute>

</xs:extension>

</xs:complexContent>

</xs:complexType>

```
ENTITY IfcCartesianPoint
```

SUBTYPE OF (IfcPoint)**;**

Coordinates : LIST [1:3] OF IfcLengthMeasure;

DERIVE

Dim : IfcDimensionCount := HIINDEX(Coordinates);

WHERE

CP2Dor3D : HIINDEX(Coordinates) >= 2;

END_ENTITY;

References: IfcBoundingBox IfcBSplineCurve IfcBSplineSurface IfcCartesianTransformationOperator IfcCurveSegment2D IfcLine IfcPlacement IfcPolyline IfcTrimmingSelect IfcFillAreaStyleHatching IfcLightSourcePositional IfcPolyLoop