-- Created on: 1993-04-22
-- Created by: Laurent PAINNOT
-- Copyright (c) 1993-1999 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.

package AppCont

    ---Purpose: This package provides the least square algorithms 
    --          necessary to approximate a set of continous curves
    --          or a continous surface.
    --          
    --          
    --          It also provides an instantiation of these algorithms 
    --          for a class Function, a function f(t).
    --          The user will have to inherit class Function to use it.


    ---Level : Advanced.  
    --  All methods of all  classes will be advanced.




uses AppParCurves, Geom, math, StdFail, TCollection, TColStd, gp, 
     TColgp, Standard


is


    deferred generic class TheLineTool; --- Template
    	---Purpose: Tool describing a continous MultiLine.
   	 --          The MultiLine is described by a parameter.

    deferred generic class TheSurfTool; --- Template
    	---Purpose: Tool describing a continous Surface.
	    --          The Surface is described by a couple of parameters.



    -------------------------------
    --- Algorithms:
    -------------------------------
  
    ---Purpose: The two following algorithms are using the same recipe:
    --          Minimizing the difference between the approximate result 
    --          Curve or Surface and respectively a continous MultiLine 
    --          or a continous surface.

    generic class LeastSquare;
	    ---Purpose: makes an approximation of a continous Line described by
	    --          the tool TheLineTool.

    generic class SurfLeastSquare;
	    ---Purpose: makes an approximation of a continous Surface 
	    --          described by the tool TheSurfaceTool.



    ------------------------------------------------------
    --- Necessary class for approximation a function f(t):
    ------------------------------------------------------

    deferred class Function;
	    ---Purpose: This class must be provided by the user to use the
	    --          approximation algorithm FittingCurve.


    class FunctionTool;
	    ---Purpose: This class is the inteface between the Function 
	    --          class and the tool asked by LeastSquare.


    ---------------------------------------------------------
    --- Necessary class for approximation a 2d function f(t):
    ---------------------------------------------------------

    deferred class Function2d;
	    ---Purpose: This class must be provided by the user to use the
	    --          approximation algorithm FittingCurve2d.


    class FunctionTool2d;
	    ---Purpose: This class is the inteface between the Function2d 
	    --          class and the tool asked by LeastSquare.



    class FitFunction instantiates LeastSquare from AppCont
	    (Function from AppCont, FunctionTool from AppCont);

    class FitFunction2d instantiates LeastSquare from AppCont
	    (Function2d from AppCont, FunctionTool2d from AppCont);


end AppCont;