8.9.3.58 IfcRepresentationMap

AbRV ⓘ

RV ⓘ

8.9.3.58.1 Semantic definition

An IfcRepresentationMap defines the base definition (also referred to as block, cell or macro) called MappedRepresentation within the MappingOrigin. The MappingOrigin defines the coordinate system in which the MappedRepresentation is defined.

The RepresentationMap is used through an IfcMappedItem in one or several IfcShapeRepresentation's. An Cartesian transformation operator can be applied to transform the MappedRepresentation into the placement coordinate system of the shape representation. The transformation of the representation map is restricted to be a Cartesian transformation mapping (translation, rotation, mirroring and scaling).

8.9.3.58.2 Entity inheritance

- IfcRepresentationMap

8.9.3.58.3 Attributes

#	Attribute	Type	Description
IfcRepresentationMap (4)
1	MappingOrigin	IfcAxis2Placement	An axis2 placement that defines the position about which the mapped representation is mapped.
2	MappedRepresentation	IfcRepresentation	A representation that is mapped to at least one mapped item.
	HasShapeAspects	SET [0:?] OF IfcShapeAspect FOR PartOfProductDefinitionShape	Reference to the shape aspect that represents part of the shape or its feature distinctively. IFC4-CHANGE Inverse attribute added.
	MapUsage	SET [0:?] OF IfcMappedItem FOR MappingSource	No description available.

Table 8.9.3.58.N

8.9.3.58.4 Formal propositions

Name	Description
ApplicableMappedRepr	Only representations of type IfcShapeRepresentation, or IfcTopologyRepresentation are allowed as MappedRepresentation.
`'IFC4X3_DEV_040635d1.IFCSHAPEMODEL' IN TYPEOF(MappedRepresentation)`

Table 8.9.3.58.O

8.9.3.58.5 Examples

Figure 8.9.3.58.A

Basin Advanced Brep
Figure 8.9.3.58.B

Tessellation With Blob Texture
Figure 8.9.3.58.C

Tessellation With Pixel Texture
Figure 8.9.3.58.D

Linear Placement Of Signal
Figure 8.9.3.58.E

Mapped Shape With Multiple Items
Figure 8.9.3.58.F

Reinforcing Stirrup
Figure 8.9.3.58.G

Reinforcing Assembly
Figure 8.9.3.58.H

Basin Tessellation
Figure 8.9.3.58.I

Basin Faceted Brep
Figure 8.9.3.58.J

Tessellation With Image Texture
Figure 8.9.3.58.K

Mapped Shape Without Transformation
Figure 8.9.3.58.L

Bath Csg Solid
Figure 8.9.3.58.M

Mapped Shape With Transformation

8.9.3.58.6 Formal representation

ENTITY IfcRepresentationMap;
	MappingOrigin : IfcAxis2Placement;
	MappedRepresentation : IfcRepresentation;
 INVERSE
	HasShapeAspects : SET [0:?] OF IfcShapeAspect FOR PartOfProductDefinitionShape;
	MapUsage : SET [0:?] OF IfcMappedItem FOR MappingSource;
 WHERE
	ApplicableMappedRepr : 'IFC4X3_DEV_040635d1.IFCSHAPEMODEL' IN TYPEOF(MappedRepresentation);
END_ENTITY;