IfcCartesianPointList3D

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcCartesianPointList3D			ADDED

Semantic definitions at the entity

Entity definition

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 definitions

#	Attribute	Type	Cardinality	Description	C
1	CoordList	IfcLengthMeasure	L[1:?]L[3:3]	Two-dimensional list of Cartesian points provided by three coordinates.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	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

Formal representations

XSD Specification

 <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>

EXPRESS Specification


ENTITY IfcCartesianPointList3D

 SUBTYPE OF (IfcCartesianPointList);

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

END_ENTITY;

 EXPRESS-G diagram

	Liste von Kartesischen 3D Punkten
	Cartesian Point List3 D