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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:

  1. 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;
ENTITY IfcTopologicalRepresentationItem;
ENTITY IfcConnectedFaceSet;
CfsFaces  :  SET [1:?] OF IfcFace;
END_ENTITY;