8.14.3.5 IfcLightSourceDirectional

8.14.3.5.1 Semantic definition

8.14.3.5.2 Entity inheritance

8.14.3.5.3 Attributes

#	Attribute	Type	Description
IfcRepresentationItem (2)
	LayerAssignment	SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems	Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items. IFC2x3-CHANGE The inverse attribute LayerAssignments has been added. IFC4-CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
	StyledByItem	SET [0:1] OF IfcStyledItem FOR Item	Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. IFC2x3-CHANGE The inverse attribute StyledByItem has been added.
IfcLightSource (4)
1	Name	OPTIONAL IfcLabel	The name given to the light source in presentation.
2	LightColour	IfcColourRgb	Definition from ISO/CD 10303-46:1992: Based on the current lighting model, the colour of the light to be used for shading. Definition from VRML97 - ISO/IEC 14772-1:1997: The color field specifies the spectral color properties of both the direct and ambient light emission as an RGB value.
3	AmbientIntensity	OPTIONAL IfcNormalisedRatioMeasure	Definition from VRML97 - ISO/IEC 14772-1:1997: The ambientIntensity specifies the intensity of the ambient emission from the light. Light intensity may range from 0.0 (no light emission) to 1.0 (full intensity).
4	Intensity	OPTIONAL IfcNormalisedRatioMeasure	Definition from VRML97 - ISO/IEC 14772-1:1997: The intensity field specifies the brightness of the direct emission from the light. Light intensity may range from 0.0 (no light emission) to 1.0 (full intensity).
Click to show 6 hidden inherited attributes
IfcLightSourceDirectional (1)
5	Orientation	IfcDirection	Definition from ISO/CD 10303-46:1992: This direction is the direction of the light source. Definition from VRML97 - ISO/IEC 14772-1:1997: The direction field specifies the direction vector of the illumination emanating from the light source in the local coordinate system. Light is emitted along parallel rays from an infinite distance away.

Table 8.14.3.5.A

8.14.3.5.4 Formal representation

 ENTITY IfcLightSourceDirectional
 SUBTYPE OF (IfcLightSource);
	Orientation : IfcDirection;
END_ENTITY;

8.14.3.5.5 References

IfcLightSource

	ENTITY IfcLightSourceDirectional
	SUBTYPE OF (IfcLightSource);
	Orientation : IfcDirection;
	END_ENTITY;