IfcLightIntensityDistribution

Semantic definitions at the entity

Entity definition

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.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
1	LightDistributionCurve	IfcLightDistributionCurveEnum	[1:1]	Standardized light distribution curve used to define the luminous intensity of the light in all directions.	X
2	DistributionData	IfcLightDistributionData	L[1:?]	Light 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.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcLightIntensityDistribution
1	LightDistributionCurve	IfcLightDistributionCurveEnum	[1:1]	Standardized light distribution curve used to define the luminous intensity of the light in all directions.	X
2	DistributionData	IfcLightDistributionData	L[1:?]	Light 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.	X

Formal representations

XSD Specification

 <xs:element name="IfcLightIntensityDistribution" type="ifc:IfcLightIntensityDistribution" substitutionGroup="ifc:Entity" nillable="true"/>

 <xs:complexType name="IfcLightIntensityDistribution">

  <xs:complexContent>

   <xs:extension base="ifc:Entity">

    <xs:sequence>

     <xs:element name="DistributionData">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcLightDistributionData" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcLightDistributionData"/>

       <xs:attribute ref="ifc:cType" fixed="list"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="LightDistributionCurve" type="ifc:IfcLightDistributionCurveEnum" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcLightIntensityDistribution;

  LightDistributionCurve : IfcLightDistributionCurveEnum;

  DistributionData : LIST [1:?] OF IfcLightDistributionData;

END_ENTITY;

 EXPRESS-G diagram

	Lichtstärkenverteilung
	Light Intensity Distribution
	Distribution de l'intensité lumineuse