mirror of
https://github.com/glatterf42/music-panphasia.git
synced 2024-09-19 16:13:46 +02:00
332 lines
11 KiB
C++
332 lines
11 KiB
C++
/*
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transfer_camb.cc - This file is part of MUSIC -
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a code to generate multi-scale initial conditions for cosmological simulations
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Copyright (C) 2010 Oliver Hahn
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*/
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#include "transfer_function.hh"
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const double tiny = 1e-30;
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class transfer_CAMB_plugin : public transfer_function_plugin {
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private:
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std::string m_filename_Pk, m_filename_Tk;
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std::vector<double> m_tab_k, m_tab_Tk_tot, m_tab_Tk_cdm, m_tab_Tk_baryon;
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std::vector<double> m_tab_Tvk_tot, m_tab_Tvk_cdm, m_tab_Tvk_baryon;
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gsl_interp_accel *acc_tot, *acc_cdm, *acc_baryon;
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gsl_interp_accel *acc_vtot, *acc_vcdm, *acc_vbaryon;
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gsl_spline *spline_tot, *spline_cdm, *spline_baryon;
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gsl_spline *spline_vtot, *spline_vcdm, *spline_vbaryon;
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double m_kmin, m_kmax, m_Omega_b, m_Omega_m, m_zstart;
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unsigned m_nlines;
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bool m_linbaryoninterp;
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void read_table(void) {
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m_nlines = 0;
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m_linbaryoninterp = false;
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#ifdef WITH_MPI
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if (MPI::COMM_WORLD.Get_rank() == 0) {
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#endif
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LOGINFO("Reading tabulated transfer function data from file \n \'%s\'",
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m_filename_Tk.c_str());
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LOGINFO("CAUTION: make sure that this transfer function \n\t has been output for z=%f!",m_zstart);
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std::string line;
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std::ifstream ifs(m_filename_Tk.c_str());
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if (!ifs.good())
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throw std::runtime_error("Could not find transfer function file \'" +
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m_filename_Tk + "\'");
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m_tab_k.clear();
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m_tab_Tk_tot.clear();
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m_tab_Tk_cdm.clear();
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m_tab_Tk_baryon.clear();
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m_tab_Tvk_tot.clear();
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m_tab_Tvk_cdm.clear(); //>[150609SH: add]
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m_tab_Tvk_baryon.clear(); //>[150609SH: add]
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m_kmin = 1e30;
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m_kmax = -1e30;
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std::ofstream ofs("dump_transfer.txt");
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while (!ifs.eof()) {
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getline(ifs, line);
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if (ifs.eof()) break;
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// OH: ignore line if it has a comment:
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if (line.find("#") != std::string::npos) continue;
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std::stringstream ss(line);
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double k, Tkc, Tkb, Tktot, Tkvtot, Tkvc, Tkvb, dummy;
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ss >> k;
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ss >> Tkc; // cdm
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ss >> Tkb; // baryon
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ss >> dummy; // photon
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ss >> dummy; // nu
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ss >> dummy; // mass_nu
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ss >> Tktot; // total
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ss >> dummy; // no_nu
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ss >> dummy; // total_de
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ss >> dummy; // Weyl
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ss >> Tkvc; //>[150609SH: add] // v_cdm
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ss >> Tkvb; //>[150609SH: add] // v_b
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ss >> dummy; // v_b-v_cdm
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if( ss.bad() || ss.fail() ){
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LOGERR("Error reading the transfer function file (corrupt or not in expected format)!");
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throw std::runtime_error("Error reading transfer function file \'" +
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m_filename_Tk + "\'");
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}
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if( m_Omega_b < 1e-6 ) Tkvtot = Tktot;
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else Tkvtot=((m_Omega_m-m_Omega_b)*Tkvc+m_Omega_b*Tkvb)/m_Omega_m; //MvD
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m_linbaryoninterp |= Tkb < 0.0 || Tkvb < 0.0;
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m_tab_k.push_back(log10(k));
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m_tab_Tk_tot.push_back(Tktot);
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m_tab_Tk_baryon.push_back(Tkb);
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m_tab_Tk_cdm.push_back(Tkc);
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m_tab_Tvk_tot.push_back(Tkvtot);
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m_tab_Tvk_baryon.push_back(Tkvb);
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m_tab_Tvk_cdm.push_back(Tkvc);
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++m_nlines;
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if (k < m_kmin)
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m_kmin = k;
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if (k > m_kmax)
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m_kmax = k;
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}
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for (size_t i = 0; i < m_tab_k.size(); ++i) {
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m_tab_Tk_tot[i] = log10(m_tab_Tk_tot[i]);
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m_tab_Tk_cdm[i] = log10(m_tab_Tk_cdm[i]);
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m_tab_Tvk_cdm[i] = log10(m_tab_Tvk_cdm[i]);
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m_tab_Tvk_tot[i] = log10(m_tab_Tvk_tot[i]);
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if (!m_linbaryoninterp) {
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m_tab_Tk_baryon[i] = log10(m_tab_Tk_baryon[i]);
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m_tab_Tvk_baryon[i] = log10(m_tab_Tvk_baryon[i]);
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}
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}
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ifs.close();
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LOGINFO("Read CAMB transfer function table with %d rows", m_nlines);
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if (m_linbaryoninterp)
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LOGINFO("Using log-lin interpolation for baryons\n (TF is not "
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"positive definite)");
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#ifdef WITH_MPI
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}
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unsigned n = m_tab_k.size();
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MPI::COMM_WORLD.Bcast(&n, 1, MPI_UNSIGNED, 0);
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if (MPI::COMM_WORLD.Get_rank() > 0) {
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m_tab_k.assign(n, 0);
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m_tab_Tk_tot.assign(n, 0);
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m_tab_Tk_cdm.assign(n, 0);
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m_tab_Tk_baryon.assign(n, 0);
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m_tab_Tvk_tot.assign(n, 0);
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m_tab_Tvk_cdm.assign(n, 0); //>[150609SH: add]
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m_tab_Tvk_baryon.assign(n, 0); //>[150609SH: add]
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}
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MPI::COMM_WORLD.Bcast(&m_tab_k[0], n, MPI_DOUBLE, 0);
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MPI::COMM_WORLD.Bcast(&m_tab_Tk_tot[0], n, MPI_DOUBLE, 0);
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MPI::COMM_WORLD.Bcast(&m_tab_Tk_cdm[0], n, MPI_DOUBLE, 0);
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MPI::COMM_WORLD.Bcast(&m_tab_Tk_baryon[0], n, MPI_DOUBLE, 0);
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MPI::COMM_WORLD.Bcast(&m_tab_Tvk_tot[0], n, MPI_DOUBLE, 0);
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MPI::COMM_WORLD.Bcast(&m_tab_Tvk_cdm[0], n, MPI_DOUBLE,
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0); //>[150609SH: add]
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MPI::COMM_WORLD.Bcast(&m_tab_Tvk_baryon[0], n, MPI_DOUBLE,
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0); //>[150609SH: add]
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#endif
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}
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public:
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transfer_CAMB_plugin(config_file &cf)
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: transfer_function_plugin(cf)
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{
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m_filename_Tk = pcf_->getValue<std::string>("cosmology", "transfer_file");
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m_Omega_m=cf.getValue<double>("cosmology","Omega_m"); //MvD
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m_Omega_b=cf.getValue<double>("cosmology","Omega_b"); //MvD
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m_zstart =cf.getValue<double>("setup","zstart"); //MvD
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read_table();
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acc_tot = gsl_interp_accel_alloc();
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acc_cdm = gsl_interp_accel_alloc();
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acc_baryon = gsl_interp_accel_alloc();
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acc_vtot = gsl_interp_accel_alloc(); //>[150609SH: add]
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acc_vcdm = gsl_interp_accel_alloc(); //>[150609SH: add]
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acc_vbaryon = gsl_interp_accel_alloc(); //>[150609SH: add]
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spline_tot = gsl_spline_alloc(gsl_interp_cspline, m_tab_k.size());
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spline_cdm = gsl_spline_alloc(gsl_interp_cspline, m_tab_k.size());
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spline_baryon = gsl_spline_alloc(gsl_interp_cspline, m_tab_k.size());
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spline_vtot = gsl_spline_alloc(gsl_interp_cspline, m_tab_k.size());
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spline_vcdm =
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gsl_spline_alloc(gsl_interp_cspline, m_tab_k.size()); //>[150609SH: add]
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spline_vbaryon =
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gsl_spline_alloc(gsl_interp_cspline, m_tab_k.size()); //>[150609SH: add]
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gsl_spline_init(spline_tot, &m_tab_k[0], &m_tab_Tk_tot[0], m_tab_k.size());
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gsl_spline_init(spline_cdm, &m_tab_k[0], &m_tab_Tk_cdm[0], m_tab_k.size());
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gsl_spline_init(spline_baryon, &m_tab_k[0], &m_tab_Tk_baryon[0],
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m_tab_k.size());
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gsl_spline_init(spline_vtot, &m_tab_k[0], &m_tab_Tvk_tot[0],
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m_tab_k.size()); //>[150609SH: add]
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gsl_spline_init(spline_vcdm, &m_tab_k[0], &m_tab_Tvk_cdm[0],
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m_tab_k.size()); //>[150609SH: add]
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gsl_spline_init(spline_vbaryon, &m_tab_k[0], &m_tab_Tvk_baryon[0],
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m_tab_k.size()); //>[150609SH: add]
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tf_distinct_ = true; // [150612SH: different density between CDM v.s. Baryon]
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tf_withvel_ = true; // [150612SH: using velocity transfer function]
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}
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~transfer_CAMB_plugin() {
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gsl_spline_free(spline_tot);
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gsl_spline_free(spline_cdm);
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gsl_spline_free(spline_baryon);
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gsl_spline_free(spline_vtot);
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gsl_spline_free(spline_vcdm); //>[150609SH: add]
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gsl_spline_free(spline_vbaryon); //>[150609SH: add]
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gsl_interp_accel_free(acc_tot);
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gsl_interp_accel_free(acc_cdm);
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gsl_interp_accel_free(acc_baryon);
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gsl_interp_accel_free(acc_vtot);
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gsl_interp_accel_free(acc_vcdm); //>[150609SH: add]
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gsl_interp_accel_free(acc_vbaryon); //>[150609SH: add]
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}
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// linear interpolation in log-log
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inline double extrap_right(double k, const tf_type &type) {
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int n = m_tab_k.size() - 1, n1 = n - 1;
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double v1(1.0), v2(1.0);
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double lk = log10(k);
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double dk = m_tab_k[n] - m_tab_k[n1];
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double delk = lk - m_tab_k[n];
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switch (type) {
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case cdm:
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v1 = m_tab_Tk_cdm[n1];
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v2 = m_tab_Tk_cdm[n];
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return pow(10.0, (v2 - v1) / dk * (delk) + v2);
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case baryon:
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v1 = m_tab_Tk_baryon[n1];
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v2 = m_tab_Tk_baryon[n];
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if (m_linbaryoninterp)
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return std::max((v2 - v1) / dk * (delk) + v2, tiny);
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return pow(10.0, (v2 - v1) / dk * (delk) + v2);
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case vtotal: //>[150609SH: add]
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v1 = m_tab_Tvk_tot[n1];
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v2 = m_tab_Tvk_tot[n];
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return pow(10.0, (v2 - v1) / dk * (delk) + v2);
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case vcdm: //>[150609SH: add]
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v1 = m_tab_Tvk_cdm[n1];
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v2 = m_tab_Tvk_cdm[n];
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return pow(10.0, (v2 - v1) / dk * (delk) + v2);
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case vbaryon: //>[150609SH: add]
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v1 = m_tab_Tvk_baryon[n1];
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v2 = m_tab_Tvk_baryon[n];
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if (m_linbaryoninterp)
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return std::max((v2 - v1) / dk * (delk) + v2, tiny);
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return pow(10.0, (v2 - v1) / dk * (delk) + v2);
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case total:
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v1 = m_tab_Tk_tot[n1];
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v2 = m_tab_Tk_tot[n];
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return pow(10.0, (v2 - v1) / dk * (delk) + v2);
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default:
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throw std::runtime_error(
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"Invalid type requested in transfer function evaluation");
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}
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return 0.0;
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}
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inline double compute(double k, tf_type type) {
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// use constant interpolation on the left side of the tabulated values
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if (k < m_kmin) {
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switch (type) {
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case cdm:
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return pow(10.0, m_tab_Tk_cdm[0]);
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case baryon:
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if (m_linbaryoninterp)
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return m_tab_Tk_baryon[0];
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return pow(10.0, m_tab_Tk_baryon[0]);
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case vtotal:
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return pow(10.0, m_tab_Tvk_tot[0]);
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case vcdm:
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return pow(10.0, m_tab_Tvk_cdm[0]);
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case vbaryon:
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if (m_linbaryoninterp)
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return m_tab_Tvk_baryon[0];
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return pow(10.0, m_tab_Tvk_baryon[0]);
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case total:
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return pow(10.0, m_tab_Tk_tot[0]);
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default:
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throw std::runtime_error(
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"Invalid type requested in transfer function evaluation");
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}
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}
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// use linear interpolation on the right side of the tabulated values
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else if (k > m_kmax)
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return extrap_right(k, type);
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double lk = log10(k);
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switch (type) {
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case cdm:
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return pow(10.0, gsl_spline_eval(spline_cdm, lk, acc_cdm));
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case baryon:
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if (m_linbaryoninterp)
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return gsl_spline_eval(spline_baryon, lk, acc_baryon);
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return pow(10.0, gsl_spline_eval(spline_baryon, lk, acc_baryon));
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case vtotal:
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return pow(10.0, gsl_spline_eval(spline_vtot, lk, acc_vtot)); //MvD
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case vcdm:
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return pow(10.0, gsl_spline_eval(spline_vcdm, lk, acc_vcdm));
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case vbaryon:
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if (m_linbaryoninterp)
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return gsl_spline_eval(spline_vbaryon, lk, acc_vbaryon);
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return pow(10.0, gsl_spline_eval(spline_vbaryon, lk, acc_vbaryon));
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case total:
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return pow(10.0, gsl_spline_eval(spline_tot, lk, acc_tot));
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default:
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throw std::runtime_error(
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"Invalid type requested in transfer function evaluation");
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}
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}
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inline double get_kmin(void) { return pow(10.0, m_tab_k[1]); }
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inline double get_kmax(void) {
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return pow(10.0, m_tab_k[m_tab_k.size() - 2]);
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}
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};
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namespace {
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transfer_function_plugin_creator_concrete<transfer_CAMB_plugin>
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creator("camb_file");
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}
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