OCCT

// Copyright (c) 2026 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 _MathPoly_Quartic_HeaderFile
#define _MathPoly_Quartic_HeaderFile

#include <MathPoly_Cubic.hxx>

namespace MathPoly
{

//! Solves a*x^4 + b*x^3 + c*x^2 + d*x + e = 0 for all distinct real roots.
//! Multiplicities are reported explicitly in PolyResult::Multiplicities.
inline PolyResult Quartic(double theA, double theB, double theC, double theD, double theE)
{
  const double aCoefficients[5] = {theE, theD, theC, theB, theA};
  return Utils::SolveDirect(aCoefficients, 4);
}

} // namespace MathPoly

#endif // _MathPoly_Quartic_HeaderFile