// 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.

#include <StdFail_UndefinedDerivative.hxx>

#include <gp_Pnt.hxx>
#include <gp_Dir2d.hxx>
#include <gp_Dir.hxx>

inline Standard_Real IntImp_ZerParFunc::Root() const {

  return f[0]*f[0]+f[1]*f[1]+f[2]*f[2];
}


inline gp_Pnt IntImp_ZerParFunc::Point() const {
  return  gp_Pnt((pntsol1.XYZ()+ pntsol2.XYZ())/2.);
}

inline gp_Dir IntImp_ZerParFunc::Direction() const {
  if (tangent ) throw StdFail_UndefinedDerivative();
  return gp_Dir(tgduv[0]*dpuv[0].XYZ() + tgduv[1]*dpuv[1].XYZ());
}

inline gp_Dir2d IntImp_ZerParFunc::DirectionOnS1() const {
  if (tangent ) throw StdFail_UndefinedDerivative();
  return gp_Dir2d(tgduv[0],tgduv[1]);
}

inline gp_Dir2d IntImp_ZerParFunc::DirectionOnS2() const {
  if (tangent ) throw StdFail_UndefinedDerivative();
  return gp_Dir2d(tgduv[2],tgduv[3]);
}

inline const ThePSurface& IntImp_ZerParFunc::AuxillarSurface1() const { 
  return *((const ThePSurface* )surf1);
}

inline const ThePSurface& IntImp_ZerParFunc::AuxillarSurface2() const {
  return *((const ThePSurface* )surf2);
}