IfcLightSourceAmbient

Semantic definitions at the entity

Entity definition

NOTE Definition according to ISO 10303-46:
The light source ambient entity is a subtype of light source. It lights a surface independent of the surface's orientation and position.

NOTE Corresponding ISO 10303 entity: light_source_ambient. Please refer to ISO/IS 10303-46:1994, p. 31 for the final definition of the formal standard.

NOTE In addition to the attributes as defined in ISO 10303-46 the additional property from ISO/IEC 14772-1:1997 (VRML) AmbientIntensity is inherited from the supertype.

HISTORY New entity in IFC2x, renamed and enhanced in IFC2x2.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRepresentationItem
	LayerAssignment	IfcPresentationLayerAssignment @AssignedItems	S[0:1]	Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.	X
	StyledByItem	IfcStyledItem @Item	S[0:1]	Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.	X
IfcGeometricRepresentationItem
IfcLightSource
1	Name	IfcLabel	[0:1]	The name given to the light source in presentation.	X
2	LightColour	IfcColourRgb	[1:1]	Definition from ISO/CD 10303-46:1992: Based on the current lighting model, the colour of the light to be used for shading. Definition from VRML97 - ISO/IEC 14772-1:1997: The color field specifies the spectral color properties of both the direct and ambient light emission as an RGB value.	X
3	AmbientIntensity	IfcNormalisedRatioMeasure	[0:1]	Definition from VRML97 - ISO/IEC 14772-1:1997: The ambientIntensity specifies the intensity of the ambient emission from the light. Light intensity may range from 0.0 (no light emission) to 1.0 (full intensity).	X
4	Intensity	IfcNormalisedRatioMeasure	[0:1]	Definition from VRML97 - ISO/IEC 14772-1:1997: The intensity field specifies the brightness of the direct emission from the ligth. Light intensity may range from 0.0 (no light emission) to 1.0 (full intensity).	X
IfcLightSourceAmbient

Formal representations

XSD Specification

 <xs:element name="IfcLightSourceAmbient" type="ifc:IfcLightSourceAmbient" substitutionGroup="ifc:IfcLightSource" nillable="true"/>

 <xs:complexType name="IfcLightSourceAmbient">

  <xs:complexContent>

   <xs:extension base="ifc:IfcLightSource"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcLightSourceAmbient

 SUBTYPE OF (IfcLightSource);

END_ENTITY;

 EXPRESS-G diagram

	Lichtquelle - diffus
	Light Source Ambient
	Source de lumière ambiante