AnalyticalGradientCalculator.h

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// @(#)root/minuit2:$Id$
// Authors: M. Winkler, F. James, L. Moneta, A. Zsenei   2003-2005
 
/**********************************************************************
 *                                                                    *
 * Copyright (c) 2005 LCG ROOT Math team,  CERN/PH-SFT                *
 *                                                                    *
 **********************************************************************/
 
#ifndef ROOT_Minuit2_AnalyticalGradientCalculator
#define ROOT_Minuit2_AnalyticalGradientCalculator
 
#include "Minuit2/GradientCalculator.h"
 
namespace ROOT {
 
namespace Minuit2 {
 
class FCNGradientBase;
class MnUserTransformation;
 
class AnalyticalGradientCalculator : public GradientCalculator {
 
public:
   AnalyticalGradientCalculator(const FCNGradientBase &fcn, const MnUserTransformation &state)
      : fGradCalc(fcn), fTransformation(state)
   {
   }
 
   ~AnalyticalGradientCalculator() {}
 
   virtual FunctionGradient operator()(const MinimumParameters &) const;
 
   virtual FunctionGradient operator()(const MinimumParameters &, const FunctionGradient &) const;
 
   virtual bool CheckGradient() const;
 
private:
   const FCNGradientBase &fGradCalc;
   const MnUserTransformation &fTransformation;
};
 
} // namespace Minuit2
 
} // namespace ROOT
 
#endif // ROOT_Minuit2_AnalyticalGradientCalculator