-- File:	AIS_EllipseRadiusDimension.cdl
-- Created:	Thu Jan 22 09:01:38 1998
-- Author:	Sergey ZARITCHNY
--		<szy@androx.nnov.matra-dtv.fr>
---Copyright:	 Matra Datavision 1998


deferred class EllipseRadiusDimension from AIS inherits Relation from AIS

	---Purpose: 
    	--  Computes  geometry  (  basis  curve  and  plane  of  dimension)
    	--  for  input  shape  aShape  from  TopoDS
	--  Root  class  for MinRadiusDimension  and  MaxRadiusDimension 
uses
     Shape                 from TopoDS,
     Elips                 from gp,
     Pnt                   from gp, 
     Pln                   from gp, 
     Curve                 from Geom,  
     OffsetCurve           from Geom,
     Ellipse               from Geom,
     Plane                 from Geom, 
     Surface               from Geom,
     ExtendedString        from TCollection,    
     KindOfSurface         from AIS,
     KindOfDimension       from AIS 

is
     Initialize(aShape      :  Shape           from  TopoDS; 
    	    	aText       :  ExtendedString  from  TCollection); 

    	--  Ellipse  radius  dimension  of  a  Shape  which  can  be  Edge 
    	--  or  Face  (planar  or  cylindrical(surface  of  extrusion  or 
    	--  surface  of  offset)) 		 

      

    KindOfDimension(me) returns KindOfDimension from AIS 
    is redefined;

    IsMovable(me) returns Boolean from Standard 
    is redefined;        


--
--     Computation private methods
-- 

    ComputeGeometry( me: mutable ) ;
--     is  private;  
      
    ComputeFaceGeometry(me: mutable)
    is private; 
     
    ComputeCylFaceGeometry(me: mutable;
    	    	     	aSurfType     : KindOfSurface  from  AIS; 
    	    	    	aSurf         : Surface  from  Geom; 
    	    	    	Offset        : Real     from  Standard )
    is private; 
     
    ComputePlanarFaceGeometry(me: mutable)
    is private; 
    
    ComputeEdgeGeometry(me: mutable)
    is private;
    
fields 

    myEllipse     :  Elips        from  gp        is  protected; 
    myFirstPar    :  Real         from  Standard  is  protected; 
    myLastPar     :  Real         from  Standard  is  protected;  
    myIsAnArc     :  Boolean      from  Standard  is  protected; 
    myOffsetCurve  : OffsetCurve  from  Geom      is  protected; 
    myOffset       : Real         from  Standard  is  protected; 
    myIsOffset     : Boolean      from  Standard  is  protected;  
     
end EllipseRadiusDimension;