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IfcDirectionalLightSource

Definition from IAI: Directional light is a light source that emits light in a specified direction, all rays being parallel. The light does not have a specific location of source and it does not attenuate.

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

EXPRESS specification:

ENTITY IfcDirectionalLightSource
SUBTYPE OF ( IfcPresentationLightSource);
Direction  :  IfcDirection;
END_ENTITY;

Attribute definitions:

Direction  :  Direction of the ligth in the WCS defined by the related geometric represenation context.

References (1):

Name Type Referred through Express-G
IfcPresentationLightSource Entity
Subtype
Diagram 2

Inheritance graph

ENTITY IfcDirectionalLightSource;
ENTITY IfcPresentationLightSource;
Color  :  IfcColorRGB;
AmbientIntensity  :  IfcNormalisedRatioMeasure;
Intensity  :  IfcNormalisedRatioMeasure;
InContext  :  IfcGeometricRepresentationContext;
Name  :  IfcLabel;
Description  :  OPTIONAL IfcText;
ENTITY IfcDirectionalLightSource;
Direction  :  IfcDirection;
END_ENTITY;