8.14.3.7 IfcLightSourcePositional
8.14.3.7.1 Semantic definition
8.14.3.7.2 Entity inheritance
-
- IfcLightSource
- IfcAnnotationFillArea
- IfcBooleanResult
- IfcBoundingBox
- IfcCartesianPointList
- IfcCartesianTransformationOperator
- IfcCsgPrimitive3D
- IfcCurve
- IfcDirection
- IfcFaceBasedSurfaceModel
- IfcFillAreaStyleHatching
- IfcFillAreaStyleTiles
- IfcGeometricSet
- IfcHalfSpaceSolid
- IfcPlacement
- IfcPlanarExtent
- IfcPoint
- IfcSectionedSpine
- IfcSegment
- IfcShellBasedSurfaceModel
- IfcSolidModel
- IfcSurface
- IfcTessellatedItem
- IfcTextLiteral
- IfcVector
8.14.3.7.3 Attributes
| # | Attribute | Type | Description |
|---|---|---|---|
| IfcRepresentationItem (2) | |||
| LayerAssignment | SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems |
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. |
|
| StyledByItem | SET [0:1] OF IfcStyledItem FOR Item |
Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. |
|
| IfcLightSource (4) | |||
| 1 | Name | OPTIONAL IfcLabel |
The name given to the light source in presentation. |
| 2 | LightColour | IfcColourRgb |
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. |
| 3 | AmbientIntensity | OPTIONAL IfcNormalisedRatioMeasure |
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). |
| 4 | Intensity | OPTIONAL IfcNormalisedRatioMeasure |
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). |
| Click to show 6 hidden inherited attributes Click to hide 6 inherited attributes | |||
| IfcLightSourcePositional (5) | |||
| 5 | Position | IfcCartesianPoint |
Definition from ISO/CD 10303-46:1992: The Cartesian point indicates the position of the light source. Definition from VRML97 - ISO/IEC 14772-1:1997: A Point light node illuminates geometry within radius of its location. |
| 6 | Radius | IfcPositiveLengthMeasure |
The maximum distance from the light source for a surface still to be illuminated. Definition from VRML97 - ISO/IEC 14772-1:1997: A Point light node illuminates geometry within radius of its location. |
| 7 | ConstantAttenuation | IfcReal |
Definition from ISO/CD 10303-46:1992: This real indicates the value of the attenuation in the lighting equation that is constant. |
| 8 | DistanceAttenuation | IfcReal |
Definition from ISO/CD 10303-46:1992: This real indicates the value of the attenuation in the lighting equation that proportional to the distance from the light source. |
| 9 | QuadricAttenuation | IfcReal |
This real indicates the value of the attenuation in the lighting equation that proportional to the square value of the distance from the light source. |
8.14.3.7.4 Formal representation
ENTITY IfcLightSourcePositional
SUPERTYPE OF (ONEOF
(IfcLightSourceSpot))
SUBTYPE OF (IfcLightSource);
Position : IfcCartesianPoint;
Radius : IfcPositiveLengthMeasure;
ConstantAttenuation : IfcReal;
DistanceAttenuation : IfcReal;
QuadricAttenuation : IfcReal;
END_ENTITY;