-- Created on: 1992-03-27
-- 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 License 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.

deferred generic class ParTool from IntImpParGen
    (ParCurve as any)

	---Purpose: Template class for a tool on a parametrised curve.

uses Pnt2d    from gp,
     Vec2d    from gp,
     Lin2d    from gp

is


    Value (myclass; C: ParCurve; U: Real from Standard)
    
	---Purpose: Returns the point at parameter U on the Curve C.

    	returns Pnt2d from gp;


    D1 (myclass; C:ParCurve; U:Real from Standard ;
        P: out Pnt2d; T: out Vec2d);

        ---Purpose: Computes the Point and the First derivative of 
        --          the parametric curve C at parameter U.


    D2 (myclass; C:ParCurve; U:Real from Standard ;
        P: out Pnt2d; T,N: out Vec2d);
    
        ---Purpose: Computes the Point, the First and the Second derivative of 
        --          the parametric curve C at parameter U.


    EpsX (myclass; C: ParCurve)

       	---Purpose: Returns the valuec of the parametric tolerance
       	--          on the curve C.
   
    	returns Real from Standard;
    

    NbSamples(myclass; C: ParCurve)

      	---Purpose: NbSamples is the number of sample point used to 
    	--          polygonise the parametric curve on its domain.

    	returns Integer from Standard;
 

end ParTool;