include/EvtGenModels/EvtItgFunction.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
0004 *                                                                      *
0005 * This file is part of EvtGen.                                         *
0006 *                                                                      *
0007 * EvtGen is free software: you can redistribute it and/or modify       *
0008 * it under the terms of the GNU General Public License as published by *
0009 * the Free Software Foundation, either version 3 of the License, or    *
0010 * (at your option) any later version.                                  *
0011 *                                                                      *
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0014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
0015 * GNU General Public License for more details.                         *
0016 *                                                                      *
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0019 ***********************************************************************/
0020
0021 #ifndef EVTITGFUNCTION_HH
0022 #define EVTITGFUNCTION_HH
0023
0024 #include "EvtGenModels/EvtItgAbsFunction.hh"
0025
0026 /**
0027  *  Generic function where the pointer to the function is available.
0028  *
0029  *  The function is taken as type pointer to function returning double and
0030  *  taking a double (the abscissa) and a const RWTValVector<double> reference
0031  *  (the parameter values of the function) as arguments.
0032  */
0033
0034 class EvtItgFunction : public EvtItgAbsFunction {
0035   public:
0036     // Constructors
0037     EvtItgFunction( double ( *theFunction )( double ), double lowerRange,
0038                     double upperRange );
0039
0040     void setCoeff( int, int, double ) override{};
0041     double getCoeff( int, int ) override { return 0.0; };
0042
0043   protected:
0044     // Helper functions
0045
0046     double myFunction( double x ) const override;
0047
0048   private:
0049     // Data members
0050     double ( *_myFunction )( double x );
0051 };
0052
0053 #endif    // EvtITGFUNCTION_HH