IfcVertex

Definition from ISO/CD 10303-42:1992: A vertex is the topological construct corresponding to a point. It has dimensionality 0 and extent 0. The domain of a vertex, if present, is a point in m dimensional real space R^M; this is represented by the vertex point subtype.

NOTE Corresponding STEP entity: vertex. Please refer to ISO/IS 10303-42:1994, p. 129 for the final definition of the formal standard.

HISTORY New Entity in IFC Release 2.0

Informal proposition:

The vertex has dimensionality 0. This is a fundamental property of the vertex.
The extent of a vertex is defined to be zero.

EXPRESS specification:

ENTITY IfcVertex

SUPERTYPE OF

(IfcVertexPoint)

SUBTYPE OF (

IfcTopologicalRepresentationItem);

END_ENTITY;

Inheritance graph

ENTITY IfcVertex;

ENTITY IfcRepresentationItem;

INVERSE

LayerAssignments

SET OF IfcPresentationLayerAssignment FOR AssignedItems;

StyledByItem

SET [0:1] OF IfcStyledItem FOR Item;

ENTITY IfcTopologicalRepresentationItem;

ENTITY IfcVertex;

END_ENTITY;