// Created on: 1998-07-09
// Created by: Stephanie HUMEAU
// Copyright (c) 1998-1999 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 _GeomFill_FunctionGuide_HeaderFile
#define _GeomFill_FunctionGuide_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Handle.hxx>

#include <Standard_Boolean.hxx>
#include <Standard_Real.hxx>
#include <gp_XYZ.hxx>
#include <math_FunctionSetWithDerivatives.hxx>
#include <Standard_Integer.hxx>
#include <math_Vector.hxx>

class Adaptor3d_Curve;
class GeomFill_SectionLaw;
class Geom_Curve;
class Geom_Surface;
class gp_Pnt;
class math_Matrix;
class gp_Vec;



class GeomFill_FunctionGuide  : public math_FunctionSetWithDerivatives
{
public:

  DEFINE_STANDARD_ALLOC

  
  Standard_EXPORT GeomFill_FunctionGuide(const Handle(GeomFill_SectionLaw)& S, const Handle(Adaptor3d_Curve)& Guide, const Standard_Real ParamOnLaw = 0.0);
  
  Standard_EXPORT void SetParam (const Standard_Real Param, const gp_Pnt& Centre, const gp_XYZ& Dir, const gp_XYZ& XDir);
  
  //! returns the number of variables of the function.
  Standard_EXPORT virtual Standard_Integer NbVariables() const Standard_OVERRIDE;
  
  //! returns the number of equations of the function.
  Standard_EXPORT virtual Standard_Integer NbEquations() const Standard_OVERRIDE;
  
  //! computes the values <F> of the Functions for the
  //! variable <X>.
  //! Returns True if the computation was done successfully,
  //! False otherwise.
  Standard_EXPORT virtual Standard_Boolean Value (const math_Vector& X, math_Vector& F) Standard_OVERRIDE;
  
  //! returns the values <D> of the derivatives for the
  //! variable <X>.
  //! Returns True if the computation was done successfully,
  //! False otherwise.
  Standard_EXPORT virtual Standard_Boolean Derivatives (const math_Vector& X, math_Matrix& D) Standard_OVERRIDE;
  
  //! returns the values <F> of the functions and the derivatives
  //! <D> for the variable <X>.
  //! Returns True if the computation was done successfully,
  //! False otherwise.
  Standard_EXPORT virtual Standard_Boolean Values (const math_Vector& X, math_Vector& F, math_Matrix& D) Standard_OVERRIDE;
  
  //! returns the values <F> of the T derivatives for
  //! the parameter Param .
  Standard_EXPORT Standard_Boolean DerivT (const math_Vector& X, const gp_XYZ& DCentre, const gp_XYZ& DDir, math_Vector& DFDT);
  
  //! returns the values <F> of the T2 derivatives for
  //! the parameter Param .
  //! returns the values <D> of  the TX derivatives for
  //! the parameter Param .
  //! returns Boolean  is static;
  //! returns the values <T> of  the X2 derivatives for
  //! the parameter Param .
  //! returns Boolean  is static;
  Standard_EXPORT Standard_Boolean Deriv2T (const gp_XYZ& DCentre, const gp_XYZ& DDir, math_Vector& DFDT, math_Vector& D2FT);




protected:





private:

  
  Standard_EXPORT void DSDT (const Standard_Real U, const Standard_Real V, const gp_XYZ& DCentre, const gp_XYZ& DDir, gp_Vec& DSDT) const;


  Handle(Adaptor3d_Curve) TheGuide;
  Handle(GeomFill_SectionLaw) TheLaw;
  Standard_Boolean isconst;
  Handle(Geom_Curve) TheCurve;
  Handle(Geom_Curve) TheConst;
  Handle(Geom_Surface) TheSurface;
  Standard_Real First;
  Standard_Real Last;
  Standard_Real TheUonS;
  gp_XYZ Centre;
  gp_XYZ Dir;


};







#endif // _GeomFill_FunctionGuide_HeaderFile