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IfcSurfaceStyleUsage

Definition from IAI: An assignment of surface style to surface, defined by IfcShapeAspect. Style can be applied to positive, negative or both sides of the surface. Style can be applied to IfcShapeAspect defined by IfcSurface or by IfcSolidModel; in the latter case, the boundaries of the solid define the surface, and the outside shall be taken as positive side.

HISTORY New Entity in IFC 2x.
ISSUE See issue and change log for changes made in IFC 2x.

EXPRESS specification:

ENTITY IfcSurfaceStyleUsage;
AppliedTo  :  SET [1:?] OF IfcStyledItemSelect;
Style  :  IfcSurfaceStyle;
Side  :  IfcSurfaceSideEnum;
END_ENTITY;

Attribute definitions:

AppliedTo  :  Assignment of the surface style to element or a region of element. The assignment shall apply to building element shape outer boundaries (when shape aspect is defined by solid model) or to shape aspect defined by IfcSurface.
Style  :  The applied surface style.
Side  :  Selection whether surface style is applied to positive, negative or both sides of the surface defined by IfcShapeAspect.

References (1):

Name Type Referred through Express-G
IfcSurfaceStyle Entity
Attribute 'Usages'
Diagram 1

Inheritance graph

ENTITY IfcSurfaceStyleUsage;
ENTITY IfcSurfaceStyleUsage;
AppliedTo  :  SET [1:?] OF IfcStyledItemSelect;
Style  :  IfcSurfaceStyle;
Side  :  IfcSurfaceSideEnum;
END_ENTITY;