RooAdaptiveIntegratorND.h

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/*****************************************************************************
 * Project: RooFit                                                           *
 * Package: RooFitCore                                                       *
 *    File: $Id$
 * Authors:                                                                  *
 *   WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu       *
 *   DK, David Kirkby,    UC Irvine,         dkirkby@uci.edu                 *
 *                                                                           *
 * Copyright (c) 2000-2005, Regents of the University of California          *
 *                          and Stanford University. All rights reserved.    *
 *                                                                           *
 * Redistribution and use in source and binary forms,                        *
 * with or without modification, are permitted according to the terms        *
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)             *
 *****************************************************************************/
#ifndef ROO_ADAPTIVE_INTEGRATOR_ND
#define ROO_ADAPTIVE_INTEGRATOR_ND
 
#include "RooAbsIntegrator.h"
#include "RooNumIntConfig.h"
#include "TString.h"
 
#include <Math/IFunctionfwd.h>
 
namespace ROOT {
namespace Math {
class AdaptiveIntegratorMultiDim;
}
} // namespace ROOT
class RooFunctor;
 
class RooAdaptiveIntegratorND : public RooAbsIntegrator {
public:
   // Constructors, assignment etc
   RooAdaptiveIntegratorND(const RooAbsFunc &function, const RooNumIntConfig &config);
 
   ~RooAdaptiveIntegratorND() override;
 
   bool checkLimits() const override;
   double integral(const double *yvec = nullptr) override;
 
   using RooAbsIntegrator::setLimits;
   bool setLimits(double *xmin, double *xmax) override;
 
   bool setUseIntegrandLimits(bool flag) override
   {
      _useIntegrandLimits = flag;
      return true;
   }
 
protected:
   RooAdaptiveIntegratorND(const RooAdaptiveIntegratorND &);
 
   bool _useIntegrandLimits; ///< If true limits of function binding are used
 
   mutable std::vector<double> _xmin;                    ///< Lower bound in each dimension
   mutable std::vector<double> _xmax;                    ///< Upper bound in each dimension
   double _epsRel;                                       ///< Relative precision
   double _epsAbs;                                       ///< Absolute precision
   Int_t _nmax;                                          ///< Max number of divisions
   Int_t _nError;                                        ///< Number of error occurrences
   Int_t _nWarn;                                         ///< Max number of warnings to be issued ;
   std::unique_ptr<RooFunctor> _rooFunctor;              ///<! RooFunctor binding
   std::unique_ptr<ROOT::Math::IMultiGenFunction> _func; ///<! ROOT::Math multi-parameter function binding
   ROOT::Math::AdaptiveIntegratorMultiDim *_integrator;
   TString _intName; ///< Integrand name
 
   friend class RooNumIntFactory;
   static void registerIntegrator(RooNumIntFactory &fact);
};
 
#endif