IFC 4.3.x development

8.8.3.8 IfcCartesianPointList

Change log

IFC4

added

8.8.3.8.1 Semantic definitions at the entity

The IfcCartesianPointList is the abstract supertype of list of points.

NOTE  The IfcCartesianPointList is introduced to provide a compact representation of potentially larger list of points, such as in point clouds, and in indexable representation of points.

HISTORY  New entity in IFC4.

8.8.3.8.1 Attributes

# Attribute Type Description
IfcRepresentationItem
LayerAssignmentSET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItemsAssignment 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 LayerAssignments has been added.

> IFC4 CHANGE  The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
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.



> IFC2x3 CHANGE  The inverse attribute StyledByItem has been added.
IfcGeometricRepresentationItem
IfcCartesianPointList
Dim INVALID The space dimensionality of this class, either 2 or 3, depending on the sub type.

8.8.3.8.2 Entity inheritance

dot_inheritance IfcCartesianPointList2D IfcCartesianPointList2D IfcCartesianPointList IfcCartesianPointList IfcCartesianPointList2D->IfcCartesianPointList IfcGeometricRepresentationItem IfcGeometricRepresentationItem IfcCartesianPointList->IfcGeometricRepresentationItem IfcCartesianPointList3D IfcCartesianPointList3D IfcCartesianPointList3D->IfcCartesianPointList IfcGeometricRepresentationItem_children 24 more... IfcGeometricRepresentationItem_children->IfcGeometricRepresentationItem IfcRepresentationItem IfcRepresentationItem IfcGeometricRepresentationItem->IfcRepresentationItem IfcRepresentationItem_children 3 more... IfcRepresentationItem_children->IfcRepresentationItem

8.8.3.8.3 Formal representations

ENTITY IfcCartesianPointList
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcCartesianPointList2D
	,IfcCartesianPointList3D))
 SUBTYPE OF (IfcGeometricRepresentationItem);
 DERIVE
	 Dim : IfcDimensionCount := IfcPointListDim(SELF);
END_ENTITY;