IFC 4.3.1.0 (IFC4X3_ADD1) development

# 8.14.3.6 IfcLightSourceGoniometric

## 8.14.3.6.1 Semantic definition

IfcLightSourceGoniometric defines a light source for which exact lighting data is available. It specifies the type of a light emitter, defines the position and orientation of a light distribution curve and the data concerning lamp and photometric information.

Figure 8.14.3.6.A shows an example of a light emitter having two light sources (of type IfcLightSourceGoniometric).

## 8.14.3.6.4 Formal representation

ENTITY IfcLightSourceGoniometric
SUBTYPE OF (IfcLightSource);
Position : IfcAxis2Placement3D;
ColourAppearance : OPTIONAL IfcColourRgb;
ColourTemperature : IfcThermodynamicTemperatureMeasure;
LuminousFlux : IfcLuminousFluxMeasure;
LightEmissionSource : IfcLightEmissionSourceEnum;
LightDistributionDataSource : IfcLightDistributionDataSourceSelect;
END_ENTITY;

## 8.14.3.6.5 References

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