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4.1.7.1.13.3 Surface Tessellation Geometry

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 table below shows a recommended list of general usage patterns that users may adopt.

G <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcElement.htm'>IfcElement</a> 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:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProductDefinitionShape.htm'>IfcProductDefinitionShape</a> IfcProductDefinitionShape 1. Name [0:1] 2. Description [0:1] 3. Representations [1:?]      ShapeOfProduct [1:?]      HasShapeAspects [0:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcElement.htm'>IfcElement</a>:Representation1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProductDefinitionShape.htm'>IfcProductDefinitionShape</a>:IfcProductDefinitionShape0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcShapeRepresentation.htm'>IfcShapeRepresentation</a> 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] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProductDefinitionShape.htm'>IfcProductDefinitionShape</a>:Representations1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcShapeRepresentation.htm'>IfcShapeRepresentation</a>:IfcShapeRepresentation0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcGeometricRepresentationContext.htm'>IfcGeometricRepresentationContext</a> 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] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcShapeRepresentation.htm'>IfcShapeRepresentation</a>:ContextOfItems1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcGeometricRepresentationContext.htm'>IfcGeometricRepresentationContext</a>:IfcGeometricRepresentationContext0 IfcLabel_0 IfcLabel <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcShapeRepresentation.htm'>IfcShapeRepresentation</a>:RepresentationIdentifier1->IfcLabel_0:IfcLabel0 IfcLabel_1 IfcLabel <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcShapeRepresentation.htm'>IfcShapeRepresentation</a>:RepresentationType1->IfcLabel_1:IfcLabel0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTriangulatedFaceSet.htm'>IfcTriangulatedFaceSet</a> IfcTriangulatedFaceSet      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:1]      HasColours [0:1]      HasTextures [0:?] 2. Normals [1:?] 3. Closed [0:1] 4. CoordIndex [1:?] 5. PnIndex [1:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcShapeRepresentation.htm'>IfcShapeRepresentation</a>:Items1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTriangulatedFaceSet.htm'>IfcTriangulatedFaceSet</a>:IfcTriangulatedFaceSet0 constraint_0 =Surface IfcLabel_0->constraint_0 constraint_1 =Tessellation IfcLabel_1->constraint_1 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCartesianPointList3D.htm'>IfcCartesianPointList3D</a> IfcCartesianPointList3D      LayerAssignment [0:1]      StyledByItem [0:1] 1. CoordList [1:?] 2. TagList [1:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTriangulatedFaceSet.htm'>IfcTriangulatedFaceSet</a>:Coordinates1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCartesianPointList3D.htm'>IfcCartesianPointList3D</a>:IfcCartesianPointList3D0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcParameterValue.htm'>IfcParameterValue</a> IfcParameterValue <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTriangulatedFaceSet.htm'>IfcTriangulatedFaceSet</a>:Normals1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcParameterValue.htm'>IfcParameterValue</a>:IfcParameterValue0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPresentationLayerAssignment.htm'>IfcPresentationLayerAssignment</a> IfcPresentationLayerAssignment 1. Name [1:1] 2. Description [0:1] 3. AssignedItems [1:?] 4. Identifier [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTriangulatedFaceSet.htm'>IfcTriangulatedFaceSet</a>:LayerAssignment1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPresentationLayerAssignment.htm'>IfcPresentationLayerAssignment</a>:AssignedItems0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcStyledItem.htm'>IfcStyledItem</a> IfcStyledItem      LayerAssignment [0:1]      StyledByItem [0:1] 1. Item [0:1] 2. Styles [1:?] 3. Name [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTriangulatedFaceSet.htm'>IfcTriangulatedFaceSet</a>:StyledByItem1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcStyledItem.htm'>IfcStyledItem</a>:Item0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcLengthMeasure.htm'>IfcLengthMeasure</a> IfcLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCartesianPointList3D.htm'>IfcCartesianPointList3D</a>:CoordList1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcLengthMeasure.htm'>IfcLengthMeasure</a>:IfcLengthMeasure0 Layer Layer <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPresentationLayerAssignment.htm'>IfcPresentationLayerAssignment</a>->Layer <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcSurfaceStyle.htm'>IfcSurfaceStyle</a> IfcSurfaceStyle 1. Name [0:1] 2. Side [1:1] 3. Styles [1:5] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcStyledItem.htm'>IfcStyledItem</a>:Styles1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcSurfaceStyle.htm'>IfcSurfaceStyle</a>:IfcSurfaceStyle0 Surface_Color_Style Surface Color Style <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcSurfaceStyle.htm'>IfcSurfaceStyle</a>->Surface_Color_Style
Figure 4.1.7.1.13.3.A

General Usage

ApplicableEntity
IfcElement
Table 4.1.7.1.13.3.B

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