-- Created on: 1995-06-13
-- Created by: Bruno DUMORTIER
-- Copyright (c) 1995-1999 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.

class MakeCurvefromApprox from GeomLib

	---Purpose: this class is used to  construct the BSpline curve
	--          from an Approximation ( ApproxAFunction from AdvApprox).
    	

uses

    ApproxAFunction from AdvApprox,
    BSplineCurve    from Geom,
    BSplineCurve    from Geom2d

raises

    NotDone    from StdFail,
    OutOfRange from Standard
    
is

    Create( Approx : ApproxAFunction  from AdvApprox)
    returns MakeCurvefromApprox from GeomLib;
    
    IsDone(me) returns Boolean from Standard
	---C++: inline
    is static;
    
    Nb1DSpaces(me) returns Integer from Standard
	---Purpose: returns the number of 1D spaces of the Approx
    is static;
    
    Nb2DSpaces(me) returns Integer from Standard
	---Purpose: returns the number of 3D spaces of the Approx
    is static;
    
    Nb3DSpaces(me) returns Integer from Standard
	---Purpose: returns the number of 3D spaces of the Approx
    is static;
    
    Curve2d(me;  Index2d : Integer from Standard) 
    	---Purpose: returns a polynomial curve whose poles correspond to 
    	-- the Index2d 2D space
    returns BSplineCurve from Geom2d
    raises 
    	OutOfRange from Standard,
    	---Purpose: if Index2d not in the Range [1,Nb2dSpaces]
	NotDone    from StdFail
	---Purpose: if the Approx is not Done
    is static;
    
    Curve2dFromTwo1d(me;  Index1d : Integer from Standard;
   		       Index2d : Integer from Standard) 
    	---Purpose: returns a 2D curve building it from the 1D curve
    	--          in x at Index1d and y at Index2d amongst the 
    	--          1D curves 

    returns BSplineCurve from Geom2d
    raises
    	OutOfRange from Standard,
    	---Purpose: if Index1d not in the Range [1,Nb1dSpaces]
    	--          if Index2d not in the Range [1,Nb1dSpaces]
	NotDone    from StdFail
	---Purpose: if the Approx is not Done
    is static;    
    
    Curve2d(me;  Index1d : Integer from Standard;
   		 Index2d : Integer from Standard) 
    	---Purpose: returns a rational curve whose poles correspond to 
    	-- the index2d of the 2D space and whose weights correspond
    	-- to one dimensional space of index 1d
    returns BSplineCurve from Geom2d
    raises
    	OutOfRange from Standard,
    	---Purpose: if Index1d not in the Range [1,Nb1dSpaces]
    	--          if Index2d not in the Range [1,Nb2dSpaces]
	NotDone    from StdFail
	---Purpose: if the Approx is not Done
    is static;

    Curve(me;  Index3d : Integer from Standard) 
    ---Purpose:  returns a polynomial curve whose poles correspond to 
    -- the Index3D 3D space
    returns BSplineCurve from Geom
    raises
    	OutOfRange from Standard,
    	---Purpose: if Index3D not in the Range [1,Nb3dSpaces]
	NotDone    from StdFail
	---Purpose: if the Approx is not Done
    is static;
 
    Curve  (me;  Index1D : Integer from Standard;
   		 Index3D : Integer from Standard) 
    ---Purpose: returns a rational curve whose poles correspond to 
    -- the index3D of the 3D space and whose weights correspond
    -- to the index1d 1D space.
    returns BSplineCurve from Geom
    raises
    	OutOfRange from Standard,
    	---Purpose: if Index1D not in the Range [1,Nb1dSpaces]
    	--          if Index3D not in the Range [1,Nb3dSpaces]
	NotDone    from StdFail
	---Purpose: if the Approx is not Done
    is static;
    
    
fields

    myApprox : ApproxAFunction from AdvApprox;

end MakeCurvefromApprox;