8.18.3.14 IfcRigidOperation

8.18.3.14.1 Semantic definition

A rigid operation specifies an offset in the coordinate reference system. It does not specify any conversion or distortion only a translation. The coordinate axes of the IfcGeometricRepresentationContext can rotate and set a new basis coordinate system.

8.18.3.14.2 Entity inheritance

8.18.3.14.3 Attributes

#	Attribute	Type	Description
IfcCoordinateOperation (2)
1	SourceCRS	IfcCoordinateReferenceSystemSelect	Source coordinate reference system for the operation.
2	TargetCRS	IfcCoordinateReferenceSystem	Target coordinate reference system for the operation.
Click to show 2 hidden inherited attributes Click to hide 2 inherited attributes
IfcRigidOperation (3)
3	FirstCoordinate	IfcMeasureValue	The first coordinate of the translation. Can be a length measure in case of map coordinates or a plane angle measure in case of geographic reference systems.
4	SecondCoordinate	IfcMeasureValue	The second coordinate of the translation. Can be a length measure in case of map coordinates or a plane angle measure in case of geographic reference systems.
5	Height	IfcLengthMeasure	Height above (positive) or below (negative) the coordinate surface.

Table 8.18.3.14.A

8.18.3.14.4 Formal propositions

Name Description

SameCoordinateType

Name	Description
SameCoordinateType	Restricts the value type of FirstCoordinate and SecondCoordinate to IfcLengthMeasure or IfcPlaneAngleMeasure and asserts the same type is used for both.
`(('IFC4X3_DEV_d297a43.IFCLENGTHMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_DEV_d297a43.IFCLENGTHMEASURE' IN TYPEOF(SecondCoordinate))) OR (('IFC4X3_DEV_d297a43.IFCPLANEANGLEMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_DEV_d297a43.IFCPLANEANGLEMEASURE' IN TYPEOF(SecondCoordinate)))`

Restricts the value type of FirstCoordinate and SecondCoordinate to IfcLengthMeasure or IfcPlaneAngleMeasure and asserts the same type is used for both.

(('IFC4X3_DEV_d297a43.IFCLENGTHMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_DEV_d297a43.IFCLENGTHMEASURE' IN TYPEOF(SecondCoordinate))) OR (('IFC4X3_DEV_d297a43.IFCPLANEANGLEMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_DEV_d297a43.IFCPLANEANGLEMEASURE' IN TYPEOF(SecondCoordinate)))

Table 8.18.3.14.B

8.18.3.14.5 Formal representation

ENTITY IfcRigidOperation
 SUBTYPE OF (IfcCoordinateOperation);
	FirstCoordinate : IfcMeasureValue;
	SecondCoordinate : IfcMeasureValue;
	Height : IfcLengthMeasure;
 WHERE
	SameCoordinateType : (('IFC4X3_DEV_d297a43.IFCLENGTHMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_DEV_d297a43.IFCLENGTHMEASURE' IN TYPEOF(SecondCoordinate))) OR (('IFC4X3_DEV_d297a43.IFCPLANEANGLEMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_DEV_d297a43.IFCPLANEANGLEMEASURE' IN TYPEOF(SecondCoordinate)));
END_ENTITY;

8.18.3.14.6 References

IfcCoordinateOperation