IfcVertexLoop

Definition from ISO/CD 10303-42:1992: A vertex_loop is a loop of zero genus consisting of a single vertex. A vertex can exist independently of a vertex loop. The topological data shall satisfy the following constraint:

Informal propositions:

A vertex loop has zero extent and dimensionality.
The vertex loop has genus 0.

NOTE: Corresponding STEP entity: vertex_loop. Please refer to ISO/IS 10303-42:1994, p. 121 for the final definition of the formal standard.

HISTORY: New Entity in Release IFC 2x Edition 2.

EXPRESS specification:

ENTITY IfcVertexLoop

SUBTYPE OF (

IfcLoop);

LoopVertex

IfcVertex;

END_ENTITY;

Attribute definitions:

LoopVertex

The vertex which defines the entire loop.

Inheritance graph

ENTITY IfcVertexLoop;

ENTITY IfcRepresentationItem;

INVERSE

LayerAssignments

SET OF IfcPresentationLayerAssignment FOR AssignedItems;

StyledByItem

SET [0:1] OF IfcStyledItem FOR Item;

ENTITY IfcTopologicalRepresentationItem;

ENTITY IfcLoop;

ENTITY IfcVertexLoop;

LoopVertex

IfcVertex;

END_ENTITY;