IfcLightDistributionData

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

A angle; if the IfcLightDistributionCurveEnum is set to TYPE_A
B angle; if the IfcLightDistributionCurveEnum is set to TYPE_B
C angle; if the IfcLightDistributionCurveEnum is set to TYPE_C

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.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	MainPlaneAngle	IfcPlaneAngleMeasure		The main plane angle (A, B or C angles, according to the light distribution curve chosen).	X
2	SecondaryPlaneAngle	IfcPlaneAngleMeasure	L[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
3	LuminousIntensity	IfcLuminousIntensityDistributionMeasure	L[1:?]	The luminous intensity distribution measure for this pair of main and secondary plane angles according to the light distribution curve chosen.	X

Attribute

Type

Cardinality

Description

MainPlaneAngle

IfcPlaneAngleMeasure

The main plane angle (A, B or C angles, according to the light distribution curve chosen).

SecondaryPlaneAngle

IfcPlaneAngleMeasure

L[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.

LuminousIntensity

IfcLuminousIntensityDistributionMeasure

L[1:?]

The luminous intensity distribution measure for this pair of main and secondary plane angles according to the light distribution curve chosen.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcLightDistributionData
1	MainPlaneAngle	IfcPlaneAngleMeasure		The main plane angle (A, B or C angles, according to the light distribution curve chosen).	X
2	SecondaryPlaneAngle	IfcPlaneAngleMeasure	L[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
3	LuminousIntensity	IfcLuminousIntensityDistributionMeasure	L[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;

 EXPRESS-G diagram

	Daten der Lichtverteilung
	Light Distribution Data
	Donn茅e de distribution lumineuse