Liste von Kartesischen 3D Punkten | |

Cartesian Point List3 D |

Item | SPF | XML | Change | Description |
---|---|---|---|---|

IFC2x3 to IFC4 |
||||

IfcCartesianPointList3D | ADDED |

The IfcCartesianPointList3D defines an ordered collection of three-dimentional Cartesian points. Each Cartesian point is provided as an three-dimensional point by a fixed list of three coordinates. The attribute *CoordList* is a two-dimensional list, where

- first dimension is an unbounded list representing each 3D Cartesian point;
- second dimension is a fixed list of three list members, where [1] is the x-coordinate, [2] the y-coordinate and [3] the z-coordinate of the Cartesian point.

NOTE The IfcCartesianPointList is introduced to provide a compact representation of larger list of points, such as in point clouds, and in indexable representation of points used as vertices in tessellated items or poly curves.

HISTORY New entity in IFC4.

# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|

1 | CoordList | IfcLengthMeasure | L[1:?]L[3:3] | Two-dimensional list of Cartesian points provided by three coordinates. | X |

# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|

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.
| 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. | X | |

IfcGeometricRepresentationItem | |||||

IfcCartesianPointList | |||||

Dim :=IfcPointListDim(SELF) | IfcDimensionCount | [1:1] | The space dimensionality of this class, either 2 or 3, depending on the sub type. | X | |

IfcCartesianPointList3D | |||||

1 | CoordList | IfcLengthMeasure | L[1:?]L[3:3] | Two-dimensional list of Cartesian points provided by three coordinates. | X |

` <xs:element name="IfcCartesianPointList3D" type="ifc:IfcCartesianPointList3D" substitutionGroup="ifc:IfcCartesianPointList" nillable="true"/>`

<xs:complexType name="IfcCartesianPointList3D">

<xs:complexContent>

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

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

<xs:simpleType>

<xs:restriction>

<xs:simpleType>

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

</xs:simpleType>

<xs:minLength value="3"/>

</xs:restriction>

</xs:simpleType>

</xs:attribute>

</xs:extension>

</xs:complexContent>

</xs:complexType>

```
ENTITY IfcCartesianPointList3D
```

SUBTYPE OF (IfcCartesianPointList)**;**

CoordList : LIST [1:?] OF LIST [3:3] OF IfcLengthMeasure;

END_ENTITY;