atmdat_gaunt.h

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/* This file is part of Cloudy and is copyright (C)1978-2023 by Gary J. Ferland and
 * others.  For conditions of distribution and use see copyright notice in license.txt */

#ifndef ATMDAT_GAUNT_H
#define ATMDAT_GAUNT_H

#include "container_classes.h"
#include "vectorize.h"

struct t_gff
{
        double Te_used;
        long nflux_used;
        vector_avx<realnum> gff;
        t_gff() : Te_used(-1.), nflux_used(0) {}
};

struct t_brems_sum
{
        double Te_used;
        long nlo;
        long nhi;
        double brems_sum;
        t_brems_sum() : Te_used(-1.), nlo(0), nhi(0), brems_sum(0.) {}
};

struct t_brems_vec
{
        double Te_used;
        long nhi;
        vector<double> brems_vec;
        t_brems_vec() : Te_used(-1.), nhi(0) {}
};

struct t_brems_den
{
        double den_Hm;
        double den_Hp;
        double den_Hep;
        double den_Hepp;
        // this will exclude hydrogen and helium
        double den_ion[LIMELM+1];
};

class t_gaunt : public Singleton<t_gaunt>
{
        friend class Singleton<t_gaunt>;

        size_t p_np_gam2;
        size_t p_np_u;

        double p_lg_gam2_min;
        double p_lg_gam2_max;
        double p_lg_u_min;
        double p_lg_u_max;
        double p_step;

        vector<double> p_lg_gam2;
        vector<double> p_lg_u;
        multi_arr<double,4> p_gff;
        vector_avx<realnum> p_vexp_arg;

        t_gff p_gff_ion[LIMELM+1];
        t_brems_sum p_cache[LIMELM+1];
        t_brems_sum p_hminus;
        t_brems_vec p_cache_vec[LIMELM+1];
        t_brems_vec p_hminus_vec;

        void p_read_table(const char* fnam, long nelem);
        void p_gauntff_vec_sub(long Z, double Te, const double anulog10[], long nmin, long nmax);
        void p_gauntff_vec(long Z, double Te, const double anulog10[], long nflux);
        void p_setup_brems(long ion, double Te);
protected:
        t_gaunt() {}
public:
        double gauntff(long Z, double Te, double anu);
        double brems_cool(long ion, double Te);
        void brems_rt(long ion, double Te, double abun, vector<double>& arr);
        void brems_opac(long ion, double Te, double abun, vector<double>& arr);
        void brems_sum_ions(t_brems_den& sum) const;
};

#endif