IfcConvertDirectionInto2D

该函数使用二维或三维方向的x/y比率作为输入，返回二维方向。

注意：此函数当前仅用于确定IfcGeometricRepresentationSubContext中的TrueNorth方向。

IFC2x4中的新函数。

 

EXPRESS Specification

FUNCTION IfcConvertDirectionInto2D
    (Direction : IfcDirection)
    : IfcDirection;

  LOCAL
    Direction2D : IfcDirection := IfcRepresentationItem() || IfcGeometricRepresentationItem () || IfcDirection([0.,1.]);
  END_LOCAL;
  
  Direction2D.DirectionRatios[1] := Direction.DirectionRatios[1];
  Direction2D.DirectionRatios[2] := Direction.DirectionRatios[2];
  
  RETURN (Direction2D);

END_FUNCTION;

 

 

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