Defined in File Ifc4x2.h
IfcLightDistributionData: public IfcUtil::IfcBaseEntity¶
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:
α angle; if the IfcLightDistributionCurveEnum is set to TYPE_A β angle; if the IfcLightDistributionCurveEnum is set to TYPE_B γ angle; if the IfcLightDistributionCurveEnum is set to TYPE_C
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).
HISTORY: New entity in IFC2x2.
The main plane angle (A, B or C angles, according to the light distribution curve chosen).
The list of secondary plane angles (the α, β or γ angles) according to the light distribution curve chosen.
NOTE: The SecondaryPlaneAngle and LuminousIntensity lists are corresponding lists.
The luminous intensity distribution measure for this pair of main and secondary plane angles according to the light distribution curve chosen.
IfcLightDistributionData(double v1_MainPlaneAngle, std::vector<double> v2_SecondaryPlaneAngle, std::vector<double> v3_LuminousIntensity)¶