IFC 4.3.x development

8.14.3.2 IfcLightIntensityDistribution

8.14.3.2.1 Semantic definitions at the entity

IfcLightIntensityDistribution defines the the luminous intensity of a light source that changes according to the direction of the ray. It is based on some standardized light distribution curves, which are defined by the LightDistributionCurve attribute.

New entity in IFC2x2.

8.14.3.2.1 Attributes

#Attribute Type Description
IfcLightIntensityDistribution
1LightDistributionCurveIfcLightDistributionCurveEnum Standardized light distribution curve used to define the luminous intensity of the light in all directions.
2DistributionData LIST [1:?] OF IfcLightDistributionDataLight distribution data applied to the light source. It is defined by a list of main plane angles (B or C according to the light distribution curve chosen) that includes (for each B or C angle) a second list of secondary plane angles (the β or γ angles) and the according luminous intensity distribution measures.

8.14.3.2.2 Entity inheritance

dot_inheritance IfcLightIntensityDistribution IfcLightIntensityDistribution

8.14.3.2.3 Formal representations

ENTITY IfcLightIntensityDistribution;
	LightDistributionCurve : IfcLightDistributionCurveEnum;
	DistributionData : LIST [1:?] OF IfcLightDistributionData;
END_ENTITY;