IFC 4.3.0.1 (IFC4X3) development

# 8.14.3.1 IfcLightDistributionData

## 8.14.3.1.1 Semantic definition

IfcLightDistributionData defines the luminous intensity of a light source given at a particular main plane angle. It is based on some standardized light distribution curves; the MainPlaneAngle is either the

For each MainPlaneAngle (considered as being the row of a table) a list of _SecondaryPlaneAngle'_s are given (considered to be the columns of a table). They are either the:

For each pair of MainPlaneAngle and SecondaryPlaneAngle the LuminousIntensity is provided (the unit is given by the IfcUnitAssignment referring to the LuminousIntensityDistributionUnit, normally cd/klm).

## 8.14.3.1.4 Formal representation

ENTITY IfcLightDistributionData;
MainPlaneAngle : IfcPlaneAngleMeasure;
SecondaryPlaneAngle : LIST [1:?] OF IfcPlaneAngleMeasure;
LuminousIntensity : LIST [1:?] OF IfcLuminousIntensityDistributionMeasure;
END_ENTITY;