GModelSpectralExponential.hpp
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/***************************************************************************
* GModelSpectralExponential.hpp - Exponential spectral model class *
* ----------------------------------------------------------------------- *
* copyright (C) 2018 by Luigi Tibaldo *
* ----------------------------------------------------------------------- *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
***************************************************************************/
/**
* @file GModelSpectralExponential.hpp
* @brief Exponential spectral model class interface definition
* @author Luigi Tibaldo
*/
#ifndef GMODELSPECTRALEXPONENTIAL_HPP
#define GMODELSPECTRALEXPONENTIAL_HPP
/* __ Includes ___________________________________________________________ */
#include <string>
#include <vector>
#include "GModelSpectral.hpp"
#include "GEnergy.hpp"
#include "GModelSpectralNodes.hpp"
#include "GFunction.hpp"
/* __ Forward declarations _______________________________________________ */
class GRan;
class GTime;
class GXmlElement;
/***********************************************************************//**
* @class GModelSpectralExponential
*
* @brief Exponential spectral model class
*
* This class implements a spectral model that is the exponential of a
* spectral model component. The spectral model component can be defined in
* an XML file, or using the exponent() method.
***************************************************************************/
class GModelSpectralExponential : public GModelSpectral {
public:
// Constructors and destructors
GModelSpectralExponential(void);
explicit GModelSpectralExponential(const GXmlElement& xml);
explicit GModelSpectralExponential(const GModelSpectral* spec);
GModelSpectralExponential(const GModelSpectralExponential& model);
virtual ~GModelSpectralExponential(void);
// Operators
virtual GModelSpectralExponential& operator=(const GModelSpectralExponential& model);
// Implemented pure virtual methods
virtual void clear(void);
virtual GModelSpectralExponential* clone(void) const;
virtual std::string classname(void) const;
virtual std::string type(void) const;
virtual double eval(const GEnergy& srcEng,
const GTime& srcTime = GTime(),
const bool& gradients = false) const;
virtual double flux(const GEnergy& emin,
const GEnergy& emax) const;
virtual double eflux(const GEnergy& emin,
const GEnergy& emax) const;
virtual GEnergy mc(const GEnergy& emin,
const GEnergy& emax,
const GTime& time,
GRan& ran) const;
virtual void read(const GXmlElement& xml);
virtual void write(GXmlElement& xml) const;
virtual std::string print(const GChatter& chatter = NORMAL) const;
// Other methods
void exponent(const GModelSpectral* spec);
const GModelSpectral* exponent(void) const;
protected:
// Protected methods
void init_members(void);
void copy_members(const GModelSpectralExponential& model);
void free_members(void);
void update_mc_cache(const GEnergy& emin, const GEnergy& emax) const;
// Class to determine the integral photon flux
class flux_kern : public GFunction {
public:
// Constructor
flux_kern(const GModelSpectral* spec) : m_exp(spec) {}
// Method
double eval(const double& x) {
GEnergy energy(x, "MeV");
double value = m_exp->eval(energy);
value = exp(value);
return value;
}
protected:
const GModelSpectral* m_exp;
};
// Class to determine the integral energy flux, derived from flux_kern
class eflux_kern : public flux_kern {
public:
// Constructor
eflux_kern(const GModelSpectral* spec) : flux_kern(spec) {}
// Method
double eval(const double& x) {
return x * flux_kern::eval(x);
}
};
// Protected members
std::string m_type; //!< Model type
GModelSpectral* m_exponent; //!< Exponent model component
// MC cache
mutable GModelSpectralNodes m_mc_spectrum; //!< MC spectrum cache
mutable GEnergy m_mc_emin; //!< Last minimum energy
mutable GEnergy m_mc_emax; //!< Last maximum energy
mutable std::vector<double> m_mc_values; //!< Parameter values
};
/***********************************************************************//**
* @brief Return class name
*
* @return String containing the class name ("GModelSpectralExponential").
***************************************************************************/
inline
std::string GModelSpectralExponential::classname(void) const
{
return ("GModelSpectralExponential");
}
/***********************************************************************//**
* @brief Return model type
*
* @return Model type.
*
* Returns the type of the spectral Multiplicative model.
***************************************************************************/
inline
std::string GModelSpectralExponential::type(void) const
{
return (m_type);
}
#endif /* GMODELSPECTRALEXPONENTIAL_HPP */