IfcConnectedFaceSet

Definition from ISO/CD 10303-42:1992: A connected_face_set is a set of faces such that the domain of faces together with their bounding edges and vertices is connected.

NOTE: Corresponding STEP entity: connected_face_set, the subtype closed_shell is included as IfcClosedShell and the subtype open_shell is included as IfcOpenShell. Please refer to ISO/IS 10303-42:1994, p. 144 for the final definition of the formal standard.

HISTORY: New class in IFC Release 1.0

Informal proposition:

The union of the domains of the faces and their bounding loops shall be arcwise connected.

EXPRESS specification:

ENTITY IfcConnectedFaceSet

SUPERTYPE OF

(ONEOF(IfcClosedShell, IfcOpenShell))

SUBTYPE OF (

IfcTopologicalRepresentationItem);

CfsFaces

SET [1:?] OF IfcFace;

END_ENTITY;

Attribute definitions:

CfsFaces

The set of faces arcwise connected along common edges or vertices.

Inheritance graph

ENTITY IfcConnectedFaceSet;

ENTITY IfcRepresentationItem;

INVERSE

LayerAssignments

SET OF IfcPresentationLayerAssignment FOR AssignedItems;

StyledByItem

SET [0:1] OF IfcStyledItem FOR Item;

ENTITY IfcTopologicalRepresentationItem;

ENTITY IfcConnectedFaceSet;

CfsFaces

SET [1:?] OF IfcFace;

END_ENTITY;