IfcCartesianPointList

IfcCartesianPointList是点列表的抽象超类型。

注意，引入IfcCartesianPointList是为了提供潜在的较大点列表（如点云中的点列表）和点的可索引表示的紧凑表示。

在IFC4中增加的新实体。

#	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]	这个类的空间维度为二维或者三维，取决于子类型。	X

EXPRESS Specification

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