IFC 4.3.0.1 (IFC4X3) development

4.8.1.4.5 Body Clipping Geometry

The Body Clipping Geometry is the representation of the 3D shape of a product by using Constructive Solid Geometry models with difference operations involving half space solids only.

The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the tables below shows a recommended list of general usage patterns that users may adopt.

G IfcElement IfcElement 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] 5. ObjectType [0:1]      IsDeclaredBy [0:1]      Declares [0:?]      IsTypedBy [0:1]      IsDefinedBy [0:?] 6. ObjectPlacement [0:1] 7. Representation [0:1]      ReferencedBy [0:?]      PositionedRelativeTo [0:?]      ReferencedInStructures [0:?] 8. Tag [0:1]      FillsVoids [0:1]      ConnectedTo [0:?]      IsInterferedByElements [0:?]      InterferesElements [0:?]      HasProjections [0:?]      HasOpenings [0:?]      IsConnectionRealization [0:?]      ProvidesBoundaries [0:?]      ConnectedFrom [0:?]      ContainedInStructure [0:1]      HasCoverings [0:?]      HasSurfaceFeatures [0:?] IfcProductDefinitionShape IfcProductDefinitionShape 1. Name [0:1] 2. Description [0:1] 3. Representations [1:?]      ShapeOfProduct [1:?]      HasShapeAspects [0:?] IfcElement:Representation1->IfcProductDefinitionShape:IfcProductDefinitionShape0 IfcShapeRepresentation IfcShapeRepresentation 1. ContextOfItems [1:1] Identifier 2. RepresentationIdentifier [0:1] Type 3. RepresentationType [0:1] Items 4. Items [1:?]      RepresentationMap [0:1]      LayerAssignments [0:?]      OfProductRepresentation [0:?]      OfShapeAspect [0:1] IfcProductDefinitionShape:Representations1->IfcShapeRepresentation:IfcShapeRepresentation0 IfcGeometricRepresentationContext IfcGeometricRepresentationContext 1. ContextIdentifier [0:1] 2. ContextType [0:1]      RepresentationsInContext [0:?] 3. CoordinateSpaceDimension [1:1] 4. Precision [0:1] 5. WorldCoordinateSystem [1:1] 6. TrueNorth [0:1]      HasSubContexts [0:?]      HasCoordinateOperation [0:1] IfcShapeRepresentation:ContextOfItems1->IfcGeometricRepresentationContext:IfcGeometricRepresentationContext0 IfcLabel_0 IfcLabel IfcShapeRepresentation:RepresentationIdentifier1->IfcLabel_0:IfcLabel0 IfcLabel_1 IfcLabel IfcShapeRepresentation:RepresentationType1->IfcLabel_1:IfcLabel0 IfcBooleanClippingResult_0 IfcBooleanClippingResult      LayerAssignment [0:1]      StyledByItem [0:1] 1. Operator [1:1] 2. FirstOperand [1:1] 3. SecondOperand [1:1] IfcShapeRepresentation:Items1->IfcBooleanClippingResult_0:IfcBooleanClippingResult0 constraint_0 =Body IfcLabel_0->constraint_0 constraint_1 =Clipping IfcLabel_1->constraint_1 IfcBooleanOperator IfcBooleanOperator IfcBooleanClippingResult_0:Operator1->IfcBooleanOperator:IfcBooleanOperator0 IfcCsgPrimitive3D IfcCsgPrimitive3D      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] IfcBooleanClippingResult_0:FirstOperand1->IfcCsgPrimitive3D:IfcCsgPrimitive3D0 IfcSolidModel IfcSolidModel      LayerAssignment [0:1]      StyledByItem [0:1] IfcBooleanClippingResult_0:FirstOperand1->IfcSolidModel:IfcSolidModel0 IfcBooleanClippingResult_1 IfcBooleanClippingResult      LayerAssignment [0:1]      StyledByItem [0:1] 1. Operator [1:1] 2. FirstOperand [1:1] 3. SecondOperand [1:1] IfcBooleanClippingResult_0:FirstOperand1->IfcBooleanClippingResult_1:IfcBooleanClippingResult0 IfcHalfSpaceSolid IfcHalfSpaceSolid      LayerAssignment [0:1]      StyledByItem [0:1] 1. BaseSurface [1:1] 2. AgreementFlag [1:1] IfcBooleanClippingResult_0:SecondOperand1->IfcHalfSpaceSolid:IfcHalfSpaceSolid0 IfcPolygonalBoundedHalfSpace IfcPolygonalBoundedHalfSpace      LayerAssignment [0:1]      StyledByItem [0:1] 1. BaseSurface [1:1] 2. AgreementFlag [1:1] 3. Position [1:1] 4. PolygonalBoundary [1:1] IfcBooleanClippingResult_0:SecondOperand1->IfcPolygonalBoundedHalfSpace:IfcPolygonalBoundedHalfSpace0 IfcPlane IfcPlane      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] IfcPolygonalBoundedHalfSpace:BaseSurface1->IfcPlane:IfcPlane0 IfcBoolean IfcBoolean IfcPolygonalBoundedHalfSpace:AgreementFlag1->IfcBoolean:IfcBoolean0 IfcAxis2Placement3D IfcAxis2Placement3D      LayerAssignment [0:1]      StyledByItem [0:1] 1. Location [1:1] 2. Axis [0:1] 3. RefDirection [0:1] IfcPolygonalBoundedHalfSpace:Position1->IfcAxis2Placement3D:IfcAxis2Placement3D0 IfcIndexedPolyCurve IfcIndexedPolyCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Points [1:1] 2. Segments [1:?] 3. SelfIntersect [1:1] IfcPolygonalBoundedHalfSpace:PolygonalBoundary1->IfcIndexedPolyCurve:IfcIndexedPolyCurve0
Figure 4.8.1.4.5.A

General Usage

ApplicableEntity
IfcElement
Table 4.8.1.4.5.B

Edit on Github


Is this page difficult to understand? Let us know!