Defined in File Ifc2x3.h
public Ifc2x3::IfcAnnotationFillArea(Class Ifc2x3::IfcAnnotationFillArea)
public Ifc2x3::IfcAnnotationSurface(Class Ifc2x3::IfcAnnotationSurface)
public Ifc2x3::IfcBooleanResult(Class Ifc2x3::IfcBooleanResult)
public Ifc2x3::IfcBoundingBox(Class Ifc2x3::IfcBoundingBox)
public Ifc2x3::IfcCartesianTransformationOperator(Class Ifc2x3::IfcCartesianTransformationOperator)
public Ifc2x3::IfcCompositeCurveSegment(Class Ifc2x3::IfcCompositeCurveSegment)
public Ifc2x3::IfcCsgPrimitive3D(Class Ifc2x3::IfcCsgPrimitive3D)
public Ifc2x3::IfcCurve(Class Ifc2x3::IfcCurve)
public Ifc2x3::IfcDefinedSymbol(Class Ifc2x3::IfcDefinedSymbol)
public Ifc2x3::IfcDirection(Class Ifc2x3::IfcDirection)
public Ifc2x3::IfcDraughtingCallout(Class Ifc2x3::IfcDraughtingCallout)
public Ifc2x3::IfcFaceBasedSurfaceModel(Class Ifc2x3::IfcFaceBasedSurfaceModel)
public Ifc2x3::IfcFillAreaStyleHatching(Class Ifc2x3::IfcFillAreaStyleHatching)
public Ifc2x3::IfcFillAreaStyleTiles(Class Ifc2x3::IfcFillAreaStyleTiles)
public Ifc2x3::IfcFillAreaStyleTileSymbolWithStyle(Class Ifc2x3::IfcFillAreaStyleTileSymbolWithStyle)
public Ifc2x3::IfcGeometricSet(Class Ifc2x3::IfcGeometricSet)
public Ifc2x3::IfcHalfSpaceSolid(Class Ifc2x3::IfcHalfSpaceSolid)
public Ifc2x3::IfcLightSource(Class Ifc2x3::IfcLightSource)
public Ifc2x3::IfcOneDirectionRepeatFactor(Class Ifc2x3::IfcOneDirectionRepeatFactor)
public Ifc2x3::IfcPlacement(Class Ifc2x3::IfcPlacement)
public Ifc2x3::IfcPlanarExtent(Class Ifc2x3::IfcPlanarExtent)
public Ifc2x3::IfcPoint(Class Ifc2x3::IfcPoint)
public Ifc2x3::IfcSectionedSpine(Class Ifc2x3::IfcSectionedSpine)
public Ifc2x3::IfcShellBasedSurfaceModel(Class Ifc2x3::IfcShellBasedSurfaceModel)
public Ifc2x3::IfcSolidModel(Class Ifc2x3::IfcSolidModel)
public Ifc2x3::IfcSurface(Class Ifc2x3::IfcSurface)
public Ifc2x3::IfcTextLiteral(Class Ifc2x3::IfcTextLiteral)
public Ifc2x3::IfcVector(Class Ifc2x3::IfcVector)
IfcGeometricRepresentationItem: public Ifc2x3::IfcRepresentationItem¶
Definition from ISO/CD 10303-43:1992: An geometric representation item is a representation item that has the additional meaning of having geometric position or orientation or both. This meaning is present by virtue of:
being a Cartesian point or a direction
referencing directly a Cartesian point or direction
referencing indirectly a Cartesian point or direction
An indirect reference to a Cartesian point or direction means that a given geometric item references the Cartesian point or direction through one or more intervening geometry or topology items.
EXAMPLE: Consider a circle. It gains its geometric position and orientation by virtue of a reference to axis2_placement (IfcAxis2Placement) that is turn references a cartesian_point (IfcCartesianPoint) and several directions (IfcDirection).
EXAMPLE: Consider a manifold brep. A manifold_solid_brep (IfcManifoldSolidBrep) is a geometric_representation_item (IfcGeometricRepresentationItem) that through several layers of topological_representation_item’s (IfcTopologicalRepresentationItem) references poly loops (IfcPolyLoop). Through additional intervening entities poly loops reference cartesian_point’s (IfcCartesianPoint).
The derivation of the dimensionality of the IfcGeometricRepresentationItem is different to ISO 10303; there is a specific derived attribute at each class that defines the dimensionality, whereas ISO 10303 does it for the representation_context and requires all geometric_representation_item’s to have the same dimensionality therein.
The definition of swept area solids as geometric representation items is different to ISO 10303; it is based on a set of predefined profiles (or cross sections), that is, a set of parameterized geometric primitives widely supported in the industry. Those profiles are used to create volumes through extrusion, revolution and cross section based sweep operations.
NOTE: Corresponding ISO 10303 entity: geometric_representation_item. Please refer to ISO/IS 10303-42:1994, p. 22 for the final definition of the formal standard. The following changes have been made: It does not inherit from ISO/IS 10303-43:1994 entity representation_item. The derived attribute Dim is demoted to the appropriate subtypes. The WR1 has not been incorporated. Not all subtypes that are in ISO/IS 10303-42:1994 have been added to the current IFC Release.
HISTORY: New entity in IFC Release 1.5
Subclassed by Ifc2x3::IfcAnnotationFillArea, Ifc2x3::IfcAnnotationSurface, Ifc2x3::IfcBooleanResult, Ifc2x3::IfcBoundingBox, Ifc2x3::IfcCartesianTransformationOperator, Ifc2x3::IfcCompositeCurveSegment, Ifc2x3::IfcCsgPrimitive3D, Ifc2x3::IfcCurve, Ifc2x3::IfcDefinedSymbol, Ifc2x3::IfcDirection, Ifc2x3::IfcDraughtingCallout, Ifc2x3::IfcFaceBasedSurfaceModel, Ifc2x3::IfcFillAreaStyleHatching, Ifc2x3::IfcFillAreaStyleTiles, Ifc2x3::IfcFillAreaStyleTileSymbolWithStyle, Ifc2x3::IfcGeometricSet, Ifc2x3::IfcHalfSpaceSolid, Ifc2x3::IfcLightSource, Ifc2x3::IfcOneDirectionRepeatFactor, Ifc2x3::IfcPlacement, Ifc2x3::IfcPlanarExtent, Ifc2x3::IfcPoint, Ifc2x3::IfcSectionedSpine, Ifc2x3::IfcShellBasedSurfaceModel, Ifc2x3::IfcSolidModel, Ifc2x3::IfcSurface, Ifc2x3::IfcTextLiteral, Ifc2x3::IfcVector