8.9.3.12 IfcCartesianPoint

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.

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. Entity adapted from cartesian_point defined in ISO 10303-42 New entity in IFC1.0

8.9.3.12.2 Entity inheritance

8.9.3.12.3 Attributes

#	Attribute	Type	Description
IfcRepresentationItem (2)
	LayerAssignment	SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems	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 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.
IfcPoint (1)
*	Dim	IfcDimensionCount	This attribute is formally derived. `IfcPointDim(SELF)` The space dimensionality of this abstract class, handled by a function specific for concrete subtypes. Determined by the number of coordinate components in case of IfcCartesianPoint or by the dimensionality of the basis curve or surface in other cases.
Click to show 3 hidden inherited attributes Click to hide 3 inherited attributes
IfcCartesianPoint (1)
1	Coordinates	LIST [1:3] OF IfcLengthMeasure	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.

Table 8.9.3.12.A

8.9.3.12.4 Formal propositions

Name	Description
CP2Dor3D	Only two or three dimensional points are in scope.
`HIINDEX(Coordinates) >= 2`

Table 8.9.3.12.B

8.9.3.12.5 Formal representation

ENTITY IfcCartesianPoint
 SUBTYPE OF (IfcPoint);
	Coordinates : LIST [1:3] OF IfcLengthMeasure;
 WHERE
	CP2Dor3D : HIINDEX(Coordinates) >= 2;
END_ENTITY;

8.9.3.12 IfcCartesianPoint

8.9.3.12.1 Semantic definition

8.9.3.12.2 Entity inheritance

8.9.3.12.3 Attributes

8.9.3.12.4 Formal propositions

8.9.3.12.5 Formal representation

8.9.3.12.6 References

8.9.3.12.7 Changelog

8.9.3.12.7.1 IFC4