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. It is a coordinate operation that tells that the whole virtual model is translated in the same way. For example, using lengths to translate along x,y,z; or using angles for a 2D translation (e.g., lambda, phi), plus a change in height.
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 | OPTIONAL IfcLengthMeasure |
Translation above (positive) or below (negative) the coordinate surface. |
8.18.3.14.4 Formal propositions
| Name | Description |
|---|---|
| SameCoordinateType |
Restricts the value type of FirstCoordinate and SecondCoordinate to IfcLengthMeasure or IfcPlaneAngleMeasure and asserts the same type is used for both. |
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8.18.3.14.5 Examples
8.18.3.14.6 Formal representation
ENTITY IfcRigidOperation
SUBTYPE OF (IfcCoordinateOperation);
FirstCoordinate : IfcMeasureValue;
SecondCoordinate : IfcMeasureValue;
Height : OPTIONAL IfcLengthMeasure;
WHERE
SameCoordinateType : (('IFC4X3_ADD2.IFCLENGTHMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_ADD2.IFCLENGTHMEASURE' IN TYPEOF(SecondCoordinate))) OR (('IFC4X3_ADD2.IFCPLANEANGLEMEASURE' IN TYPEOF(FirstCoordinate)) AND ('IFC4X3_ADD2.IFCPLANEANGLEMEASURE' IN TYPEOF(SecondCoordinate)));
END_ENTITY;