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
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
IfcTriangulatedFaceSet
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:?]
IfcShapeRepresentation :Items1->IfcTriangulatedFaceSet :IfcTriangulatedFaceSet0
constraint_0
=Surface
IfcLabel_0->constraint_0
constraint_1
=Tessellation
IfcLabel_1->constraint_1
IfcCartesianPointList3D
IfcCartesianPointList3D
LayerAssignment
[0:1]
StyledByItem
[0:1]
1. CoordList
[1:?]
2. TagList
[1:?]
IfcTriangulatedFaceSet :Coordinates1->IfcCartesianPointList3D :IfcCartesianPointList3D0
IfcParameterValue
IfcParameterValue
IfcTriangulatedFaceSet :Normals1->IfcParameterValue :IfcParameterValue0
IfcPresentationLayerAssignment
IfcPresentationLayerAssignment
1. Name
[1:1]
2. Description
[0:1]
3. AssignedItems
[1:?]
4. Identifier
[0:1]
IfcTriangulatedFaceSet :LayerAssignment1->IfcPresentationLayerAssignment :AssignedItems0
IfcStyledItem
IfcStyledItem
LayerAssignment
[0:1]
StyledByItem
[0:1]
1. Item
[0:1]
2. Styles
[1:?]
3. Name
[0:1]
IfcTriangulatedFaceSet :StyledByItem1->IfcStyledItem :Item0
IfcLengthMeasure
IfcLengthMeasure
IfcCartesianPointList3D :CoordList1->IfcLengthMeasure :IfcLengthMeasure0
Layer
Layer
IfcPresentationLayerAssignment ->Layer
IfcSurfaceStyle
IfcSurfaceStyle
1. Name
[0:1]
2. Side
[1:1]
3. Styles
[1:5]
IfcStyledItem :Styles1->IfcSurfaceStyle :IfcSurfaceStyle0
Surface_Color_Style
Surface Color Style
IfcSurfaceStyle ->Surface_Color_Style
Figure 4.1.7.1.13.3.A
General UsageTable 4.1.7.1.13.3.B