Ellipse
Ellipse Mathematical Objects  implement 
    IEllipse_KC2  
    interface, which controls its properties. 
To create an ellipse call IObjectGenerator.Create 
method with eType parameter set to eObjTypeEllipse. 
Ellipse can be used for internal calculations only. To add an ellipse to the model 
    to be displayed in 3D scene use
    IStdShape.Ellipse() 
    or wrap the ellipse into a Line Entity as described 
    in Wrapping Mathematical 
    Curves 
  
    See also:
    Curves Overview, Native Curves
         
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