MnUserFcn.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_MnUserFcn
#define ROOT_Minuit2_MnUserFcn
 
#include "Minuit2/MnFcn.h"
 
#include <vector>
 
namespace ROOT {
 
namespace Minuit2 {
 
class MnUserTransformation;
 
/**
   Wrapper used by Minuit of FCN interface
   containing a reference to the transformation object
 */
class MnUserFcn : public MnFcn {
 
public:
   MnUserFcn(const FCNBase &fcn, const MnUserTransformation &trafo, int ncall = 0)
      : MnFcn(fcn, ncall), fTransform(trafo)
   {
   }
 
   ~MnUserFcn() override {}
 
   double operator()(const MnAlgebraicVector &) const override;
 
   // Access the parameter transformations.
   // For internal use in the Minuit2 implementation.
   const MnUserTransformation &transform() const { return fTransform; }
 
   double callWithTransformedParams(std::vector<double> const &vpar) const;
 
private:
   const MnUserTransformation &fTransform;
};
 
} // namespace Minuit2
 
} // namespace ROOT
 
#endif // ROOT_Minuit2_MnUserFcn