MinimumSeedGenerator.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_MinimumSeedGenerator
#define ROOT_Minuit2_MinimumSeedGenerator

namespace ROOT {

   namespace Minuit2 {


class MinimumSeed;
class MnFcn;
class GradientCalculator;
class MnUserParameterState;
class MnStrategy;
class AnalyticalGradientCalculator;

/** base class for seed generators (starting values); the seed generator
    prepares initial starting values from the input (MnUserParameterState)
    for the minimization;
 */

class MinimumSeedGenerator {

public:

  virtual ~MinimumSeedGenerator() {}

  virtual MinimumSeed operator()(const MnFcn&, const GradientCalculator&, const MnUserParameterState&, const MnStrategy&) const = 0;

  virtual MinimumSeed operator()(const MnFcn&, const AnalyticalGradientCalculator&, const MnUserParameterState&, const MnStrategy&) const = 0;
};

  }  // namespace Minuit2

}  // namespace ROOT

#endif  // ROOT_Minuit2_MinimumSeedGenerator