// Created on: 1997-09-12
// Created by: Philippe MANGIN
// Copyright (c) 1997-1999 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.

#ifndef _FEmTool_Curve_HeaderFile
#define _FEmTool_Curve_HeaderFile

#include <Standard.hxx>
#include <Standard_Type.hxx>

#include <Standard_Integer.hxx>
#include <TColStd_HArray1OfReal.hxx>
#include <TColStd_Array1OfInteger.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <Standard_Real.hxx>
#include <Standard_Transient.hxx>
#include <TColStd_Array2OfReal.hxx>
class PLib_Base;


class FEmTool_Curve;
DEFINE_STANDARD_HANDLE(FEmTool_Curve, Standard_Transient)

//! Curve defined by Polynomial Elements.
class FEmTool_Curve : public Standard_Transient
{

public:

  
  Standard_EXPORT FEmTool_Curve(const Standard_Integer Dimension, const Standard_Integer NbElements, const Handle(PLib_Base)& TheBase, const Standard_Real Tolerance);
  
  Standard_EXPORT TColStd_Array1OfReal& Knots() const;
  
  Standard_EXPORT void SetElement (const Standard_Integer IndexOfElement, const TColStd_Array2OfReal& Coeffs);
  
  Standard_EXPORT void D0 (const Standard_Real U, TColStd_Array1OfReal& Pnt);
  
  Standard_EXPORT void D1 (const Standard_Real U, TColStd_Array1OfReal& Vec);
  
  Standard_EXPORT void D2 (const Standard_Real U, TColStd_Array1OfReal& Vec);
  
  Standard_EXPORT void Length (const Standard_Real FirstU, const Standard_Real LastU, Standard_Real& Length);
  
  Standard_EXPORT void GetElement (const Standard_Integer IndexOfElement, TColStd_Array2OfReal& Coeffs);
  
  //! returns  coefficients  of  all  elements  in  canonical  base.
  Standard_EXPORT void GetPolynom (TColStd_Array1OfReal& Coeffs);
  
  Standard_EXPORT Standard_Integer NbElements() const;
  
  Standard_EXPORT Standard_Integer Dimension() const;
  
  Standard_EXPORT Handle(PLib_Base) Base() const;
  
  Standard_EXPORT Standard_Integer Degree (const Standard_Integer IndexOfElement) const;
  
  Standard_EXPORT void SetDegree (const Standard_Integer IndexOfElement, const Standard_Integer Degree);
  
  Standard_EXPORT void ReduceDegree (const Standard_Integer IndexOfElement, const Standard_Real Tol, Standard_Integer& NewDegree, Standard_Real& MaxError);




  DEFINE_STANDARD_RTTIEXT(FEmTool_Curve,Standard_Transient)

protected:




private:

  
  Standard_EXPORT void Update (const Standard_Integer Element, const Standard_Integer Order);

  Standard_Integer myNbElements;
  Standard_Integer myDimension;
  Handle(PLib_Base) myBase;
  Handle(TColStd_HArray1OfReal) myKnots;
  TColStd_Array1OfInteger myDegree;
  TColStd_Array1OfReal myCoeff;
  TColStd_Array1OfReal myPoly;
  TColStd_Array1OfReal myDeri;
  TColStd_Array1OfReal myDsecn;
  TColStd_Array1OfInteger HasPoly;
  TColStd_Array1OfInteger HasDeri;
  TColStd_Array1OfInteger HasSecn;
  TColStd_Array1OfReal myLength;
  Standard_Real Uf;
  Standard_Real Ul;
  Standard_Real Denom;
  Standard_Real USum;
  Standard_Integer myIndex;
  Standard_Integer myPtr;


};







#endif // _FEmTool_Curve_HeaderFile