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IfcRepresentationContextSameWCS

Definition from IAI: If there are several instances of IfcGeometricRepresentationContext within one project file, the XY plane of all world coordinate systems shall be coplanar and identical.

HISTORY: New global rule in Release IFC2x

EXPRESS specification:

RULE IfcRepresentationContextSameWCS FOR
( IfcGeometricRepresentationContext);
LOCAL
  IsDifferent  : LOGICAL := FALSE;
END_LOCAL;
  IF (SIZEOF(IfcGeometricRepresentationContext) > 1)
  THEN
    REPEAT i := 2 TO HIINDEX(IfcGeometricRepresentationContext);
      IF (IfcGeometricRepresentationContext[1].WorldCoordinateSystem :<>: IfcGeometricRepresentationContext[i].WorldCoordinateSystem)
      THEN
        IsDifferent := (NOT(IfcSameValidPrecision(IfcGeometricRepresentationContext[1].Precision,
                                                  IfcGeometricRepresentationContext[i].Precision)))
                    OR (NOT(IfcSameAxis2Placement(IfcGeometricRepresentationContext[1].WorldCoordinateSystem,
                                                  IfcGeometricRepresentationContext[i].WorldCoordinateSystem,
                                                  IfcGeometricRepresentationContext[1].Precision)));
      END_IF;
    END_REPEAT;
  END_IF;
WHERE
WR1  :  IsDifferent = FALSE;
END_RULE;