IfcLightDistributionData

Natural language names
Daten der Lichtverteilung
Light Distribution Data
Donnée de distribution lumineuse
Semantic definitions at the entity
Entity 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).

HISTORY  New entity in IFC2x2.

Attribute definitions
#AttributeTypeCardinalityDescription G
1MainPlaneAngleIfcPlaneAngleMeasure The main plane angle (A, B or C angles, according to the light distribution curve chosen). X
2SecondaryPlaneAngleIfcPlaneAngleMeasureL[1:?] 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.
X
3LuminousIntensityIfcLuminousIntensityDistributionMeasureL[1:?] The luminous intensity distribution measure for this pair of main and secondary plane angles according to the light distribution curve chosen. X
Inherited definitions from supertypes
Entity inheritance
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcLightDistributionData
1MainPlaneAngleIfcPlaneAngleMeasure The main plane angle (A, B or C angles, according to the light distribution curve chosen). X
2SecondaryPlaneAngleIfcPlaneAngleMeasureL[1:?] 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.
X
3LuminousIntensityIfcLuminousIntensityDistributionMeasureL[1:?] The luminous intensity distribution measure for this pair of main and secondary plane angles according to the light distribution curve chosen. X
Formal representations
XML Specification
 <xs:element name="IfcLightDistributionData" type="ifc:IfcLightDistributionData" substitutionGroup="ifc:Entity" nillable="true"/>
 <xs:complexType name="IfcLightDistributionData">
  <xs:complexContent>
   <xs:extension base="ifc:Entity">
    <xs:attribute name="MainPlaneAngle" type="ifc:IfcPlaneAngleMeasure" use="optional"/>
    <xs:attribute name="SecondaryPlaneAngle" use="optional">
     <xs:simpleType>
      <xs:restriction>
       <xs:simpleType>
        <xs:list itemType="ifc:IfcPlaneAngleMeasure"/>
       </xs:simpleType>
      </xs:restriction>
     </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="LuminousIntensity" use="optional">
     <xs:simpleType>
      <xs:restriction>
       <xs:simpleType>
        <xs:list itemType="ifc:IfcLuminousIntensityDistributionMeasure"/>
       </xs:simpleType>
      </xs:restriction>
     </xs:simpleType>
    </xs:attribute>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcLightDistributionData;
  MainPlaneAngle : IfcPlaneAngleMeasure;
  SecondaryPlaneAngle : LIST [1:?] OF IfcPlaneAngleMeasure;
  LuminousIntensity : LIST [1:?] OF IfcLuminousIntensityDistributionMeasure;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcLightIntensityDistribution

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