-- Created on: 1992-03-26
-- Created by: Laurent BUCHARD
-- Copyright (c) 1992-1999 Matra Datavision
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
--
-- This file is part of Open CASCADE Technology software library.
--
-- This library is free software; you can redistribute it and / or modify it
-- under the terms of the GNU Lesser General Public version 2.1 as published
-- by the Free Software Foundation, with special exception defined in the file
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-- distribution for complete text of the license and disclaimer of any warranty.
--
-- Alternatively, this file may be used under the terms of Open CASCADE
-- commercial license or contractual agreement.

class IConicTool from IntCurve

	---Purpose: Implementation of the ImpTool from IntImpParGen
	--          for conics of gp.

        ---Level: Internal

uses 
     Pnt2d      from gp,
     Vec2d      from gp,
     Ax22d      from gp,
     Lin2d      from gp,
     Elips2d    from gp,
     Circ2d     from gp,
     Parab2d    from gp,
     Hypr2d     from gp,
     Trsf2d     from gp,
     CurveType  from GeomAbs


is

    Create  returns IConicTool from IntCurve;

    Create(IT: IConicTool from IntCurve)    returns IConicTool from IntCurve;

    Create(E: Elips2d from gp) 	returns IConicTool from IntCurve;

    Create(L: Lin2d from gp)   	returns IConicTool from IntCurve;

    Create(C: Circ2d from gp)  	returns IConicTool from IntCurve;

    Create(P: Parab2d from gp) 	returns IConicTool from IntCurve;

    Create(H: Hypr2d from gp) 	returns IConicTool from IntCurve;



    Value (me; X: Real from Standard)
    
    	returns Pnt2d from gp
    	is static;


    D1 (me; U: Real from Standard ; P: out Pnt2d; T: out Vec2d)
    	is static;


    D2 (me; U: Real from Standard ; P: out Pnt2d; T,N: out Vec2d)
    	is static;


    Distance(me; P: Pnt2d)
	---Purpose: Computes the value of the signed  distance between
	--          the point P and the implicit curve.
    	returns Real from Standard
    	is static;
	
	
    GradDistance(me; P: Pnt2d)
    	---Purpose: Computes  the   Gradient  of  the  Signed Distance
    	--          between  a  point and  the  implicit curve, at the
    	--          point P.
        returns Vec2d from gp
    	is static;
	
	
    FindParameter(me; P: Pnt2d)
    	---Purpose: Returns the   parameter  U of   the point  on  the
    	--          implicit curve corresponding to  the point P.  The
    	--          correspondance between P and the point P(U) on the
    	--          implicit curve must be coherent  with the  way  of
    	--          determination of the signed distance.
        returns Real from Standard
    	is static;
	
fields
    prm1          : Real      from Standard;
    prm2          : Real      from Standard;
    prm3          : Real      from Standard;
    Axis          : Ax22d     from gp;
    type          : CurveType from GeomAbs;    
    Abs_To_Object : Trsf2d    from gp;

end IConicTool;