IFC 4.3.0.1 (IFC4X3) development

8.14.3.3 IfcLightSource

ABSTRACT This definition may not be instantiated

8.14.3.3.1 Semantic definition

8.14.3.3.2 Entity inheritance

8.14.3.3.3 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.

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.

Click to show 2 hidden inherited attributes Click to hide 2 inherited attributes
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).

Table 8.14.3.3.A

8.14.3.3.4 Formal representation

ENTITY IfcLightSource
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcLightSourceAmbient
	,IfcLightSourceDirectional
	,IfcLightSourceGoniometric
	,IfcLightSourcePositional))
 SUBTYPE OF (IfcGeometricRepresentationItem);
	Name : OPTIONAL IfcLabel;
	LightColour : IfcColourRgb;
	AmbientIntensity : OPTIONAL IfcNormalisedRatioMeasure;
	Intensity : OPTIONAL IfcNormalisedRatioMeasure;
END_ENTITY;

8.14.3.3.5 References

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