Defined in File Ifc4.h
IfcLamp: public Ifc4::IfcFlowTerminal¶
A lamp is an artificial light source such as a light bulb or tube.
HISTORY New entity in IFC2x4
Type Use Definition IfcLamp defines the occurrence of any lamp; common information about lamp types is handled by IfcLampType. The IfcLampType (if present) may establish the common type name, usage (predefined type), properties, materials, ports, composition, assignments, and representations. The IfcLampType is attached using the IfcRelDefinesByType objectified relationship and is accessible by the IsTypedBy inverse attribute. If the IfcLampType has ports or aggregated elements, such objects are reflected at the IfcLamp occurrence using the IfcRelDefinesByObject relationship. Figure 202 illustrates lamp type use. Figure 202 — Lamp type use
Property Use Definition The property sets relating to this entity are defined by IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. Property sets may also be specified at the IfcLampType, defining the common property data for all occurrences of the same type. They are then accessible by the IsTypedBy inverse attribute pointing to IfcLampType.HasPropertySets. If both are given, then the properties directly defined at IfcLamp override the properties defined at IfcLampType. Refer to the documentation at the supertype IfcFlowTerminal and ancestors for inherited property set definitions. The following property set definitions are applicable to this entity: Pset_LampTypeCommon (PSET_TYPEDRIVENOVERRIDE)
Quantity Use Definition The quantities relating to this entity are defined by IfcElementQuantity and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. The following base quantities are defined and shall be exchanged with the IfcElementQuantity.Name = ‘BaseQuantities’. Other quantities, being subjected to local standard of measurement, may be defined with another string value assigned to Name. In this case a valid value for MethodOfMeasurement shall be provided.
Material Use Definition The material of the IfcLamp is defined by IfcMaterialConstituentSet or as a fallback by IfcMaterial, and attached by the RelatingMaterial attribute on the IfcRelAssociatesMaterial relationship. It is accessible by the HasAssociations inverse attribute. Material information can also be given at the IfcLampType, defining the common attribute data for all occurrences of the same type. The following keywords for IfcMaterialConstituentSet.MaterialConstituents[n].Name shall be used:
Bulb: Material from which the bulb is constructed such as glass. Conductor: Material from which the conductor is constructed. Filament: Material from which the filament is constructed.
Port Use Definition The distribution ports relating to the IfcLamp are defined by IfcDistributionPort and attached by the IfcRelConnectsPortToElement relationship. If the lamp occurrence is defined by IfcLampType, then the port occurrences must reflect those defined at the IfcLampType using the IfcRelDefinesByObject relationship. Ports are specific to the IfcLamp PredefinedType as follows indicated by the IfcDistributionPort Name, PredefinedType, and FlowDirection:
Socket (LIGHTING, SINK): The socket providing electricity.
Figure 203 illustrates lamp port use. Figure 203 — Lamp port use
Whether the optional attribute PredefinedType is defined for this IfcLamp.
IfcLamp(std::string v1_GlobalId, ::Ifc4::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description, boost::optional<std::string> v5_ObjectType, ::Ifc4::IfcObjectPlacement *v6_ObjectPlacement, ::Ifc4::IfcProductRepresentation *v7_Representation, boost::optional<std::string> v8_Tag, boost::optional<::Ifc4::IfcLampTypeEnum::Value> v9_PredefinedType)¶