GModelSpectralGauss.hpp
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/***************************************************************************
* GModelSpectralGauss.hpp - Spectral Gaussian model class *
* ----------------------------------------------------------------------- *
* copyright (C) 2014 by Christoph Deil & Ellis Owen *
* ----------------------------------------------------------------------- *
* *
* 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 GModelSpectralGauss.hpp
* @brief Gaussian spectral model class interface definition
* @author Christoph Deil & Ellis Owen
*/
#ifndef GMODELSPECTRALGAUSS_HPP
#define GMODELSPECTRALGAUSS_HPP
/* __ Includes ___________________________________________________________ */
#include <string>
#include "GModelPar.hpp"
#include "GModelSpectral.hpp"
#include "GEnergy.hpp"
#include "GXmlElement.hpp"
#include "GFunction.hpp"
/***********************************************************************//**
* @class GModelSpectralGauss
*
* @brief Gaussian spectral model class
*
* This class implements a Gaussian spectrum. The model is defined by
*
* \f[
* S_{\rm E}(E | t) =
* \frac{\tt m\_norm}{\sqrt{2 \pi} m\_sigma^2} \exp
* \left(\frac{-(E - m\_mean)^2}{2 m_\sigma^2} \right)
* \f]
*
* where
* - \f${\tt m\_norm}\f$ is the normalization,
* - \f${\tt m\_mean}\f$ is the mean energy,
* - \f${\tt m\_sigma}\f$ is the energy width.
***************************************************************************/
class GModelSpectralGauss : public GModelSpectral {
public:
// Constructors and destructors
GModelSpectralGauss(void);
explicit GModelSpectralGauss(const GXmlElement& xml);
GModelSpectralGauss(const double& norm,
const GEnergy& mean,
const GEnergy& sigma);
GModelSpectralGauss(const GModelSpectralGauss& model);
virtual ~GModelSpectralGauss(void);
// Operators
virtual GModelSpectralGauss& operator=(const GModelSpectralGauss& model);
// Implemented pure virtual base class methods
virtual void clear(void);
virtual GModelSpectralGauss* clone(void) const;
virtual std::string type(void) const;
virtual double eval(const GEnergy& srcEng,
const GTime& srcTime) const;
virtual double eval_gradients(const GEnergy& srcEng,
const GTime& srcTime);
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
double norm(void) const;
void norm(const double& norm);
GEnergy mean(void) const;
void mean(const GEnergy& mean);
GEnergy sigma(void) const;
void sigma(const GEnergy& sigma);
protected:
// Protected methods
void init_members(void);
void copy_members(const GModelSpectralGauss& model);
void free_members(void);
void update_eval_cache(const GEnergy& energy) const;
// Energy flux integration kernel
class eflux_kernel : public GFunction {
public:
eflux_kernel(const double& norm,
const double& mean,
const double& sigma) :
m_norm(norm),
m_mean(mean),
m_sigma(sigma) {}
double eval(const double& eng);
protected:
const double& m_norm; //!< Normalization
const double& m_mean; //!< Mean
const double& m_sigma; //!< Sigma
};
// Protected members
GModelPar m_norm; //!< Normalization factor
GModelPar m_mean; //!< Gaussian mean energy
GModelPar m_sigma; //!< Gaussian energy width
};
/***********************************************************************//**
* @brief Return model type
*
* @return "ConstantValue".
*
* Returns the type of the Gaussian spectral model.
***************************************************************************/
inline
std::string GModelSpectralGauss::type(void) const
{
return "Gaussian";
}
/***********************************************************************//**
* @brief Return normalization
*
* @return Normalization (ph/cm2/s).
***************************************************************************/
inline
double GModelSpectralGauss::norm(void) const
{
return (m_norm.value());
}
/***********************************************************************//**
* @brief Set normalization
*
* @param[in] norm Normalization (ph/cm2/s).
***************************************************************************/
inline
void GModelSpectralGauss::norm(const double& norm)
{
m_norm.value(norm);
return;
}
/***********************************************************************//**
* @brief Return mean energy
*
* @return Mean energy.
***************************************************************************/
inline
GEnergy GModelSpectralGauss::mean(void) const
{
GEnergy energy;
energy.MeV(m_mean.value());
return energy;
}
/***********************************************************************//**
* @brief Set mean energy
*
* @param[in] Mean energy.
***************************************************************************/
inline
void GModelSpectralGauss::mean(const GEnergy& mean)
{
m_mean.value(mean.MeV());
return;
}
/***********************************************************************//**
* @brief Return energy width
*
* @return Energy width
***************************************************************************/
inline
GEnergy GModelSpectralGauss::sigma(void) const
{
GEnergy energy;
energy.MeV(m_sigma.value());
return energy;
}
/***********************************************************************//**
* @brief Set energy width
*
* @param[in] Energy width
***************************************************************************/
inline
void GModelSpectralGauss::sigma(const GEnergy& sigma)
{
m_sigma.value(sigma.MeV());
return;
}
#endif /* GMODELSPECTRALGAUSS_HPP */