mirror of
https://github.com/glatterf42/music-panphasia.git
synced 2024-09-19 16:13:46 +02:00
350 lines
9.5 KiB
C++
350 lines
9.5 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
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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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class transfer_LINGERpp_plugin : public transfer_function_plugin
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{
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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, m_tab_Tvk_tot, m_tab_Tvk_cdm, m_tab_Tvk_baryon, m_tab_Tk_tot0;
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gsl_interp_accel *acc_dtot, *acc_dcdm, *acc_dbaryon, *acc_vtot, *acc_vcdm, *acc_vbaryon, *acc_dtot0;
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gsl_spline *spline_dtot, *spline_dcdm, *spline_dbaryon, *spline_vtot, *spline_vcdm, *spline_vbaryon, *spline_dtot0;
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bool m_bnovrel;
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bool m_bz0norm;
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void read_table( void ){
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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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std::cerr
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<< " - reading tabulated transfer function data from file \n"
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<< " \'" << m_filename_Tk << "\'\n";
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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 \'"+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();
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m_tab_Tvk_baryon.clear();
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m_tab_Tk_tot0.clear();
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const double zero = 1e-10;
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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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std::stringstream ss(line);
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double k, Tkc, Tkb, Tktot, Tkvc, Tkvb, Tkvtot, Tktot0;
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ss >> k;
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ss >> Tktot;
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ss >> Tkc;
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ss >> Tkb;
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ss >> Tkvc;
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ss >> Tkvb;
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ss >> Tkvtot;
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ss >> Tktot0;
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if( m_bnovrel )
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{
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std::cerr << " - transfer_linger++ : disabling baryon-DM relative velocity\n";
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Tkvb = Tkvc;
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}
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Tktot = std::max(zero,Tktot);
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Tkc = std::max(zero,Tkc);
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Tkb = std::max(zero,Tkb);
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Tkvtot= std::max(zero,Tkvtot);
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Tkvc = std::max(zero,Tkvc);
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Tkvb = std::max(zero,Tkvb);
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Tktot0= std::max(zero,Tktot0);
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m_tab_k.push_back( log10(k) );
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m_tab_Tk_tot.push_back( log10(Tktot) );
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m_tab_Tk_baryon.push_back( log10(Tkb) );
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m_tab_Tk_cdm.push_back( log10(Tkc) );
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m_tab_Tvk_tot.push_back( log10(Tkvtot) );
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m_tab_Tvk_cdm.push_back( log10(Tkvc) );
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m_tab_Tvk_baryon.push_back( log10(Tkvb) );
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m_tab_Tk_tot0.push_back( log10(Tktot0) );
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}
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ifs.close();
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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);
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m_tab_Tvk_baryon.assign(n,0);
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m_tab_Tk_tot0.assign(n,0);
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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, 0 );
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MPI::COMM_WORLD.Bcast( &m_tab_Tvk_baryon[0], n, MPI_DOUBLE, 0 );
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MPI::COMM_WORLD.Bcast( &m_tab_Tk_tot0[0], n, MPI_DOUBLE, 0 );
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#endif
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}
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public:
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transfer_LINGERpp_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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//.. disable the baryon-CDM relative velocity (both follow the total matter potential)
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m_bnovrel = pcf_->getValueSafe<bool>("cosmology","no_vrel",false);
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//.. normalize at z=0 rather than using the linearly scaled zini spectrum
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//.. this can be different due to radiation still being non-negligible at
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//.. high redshifts
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m_bz0norm = pcf_->getValueSafe<bool>("cosmology","z0norm",true);
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tf_distinct_ = true;
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tf_withvel_ = true;
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tf_velunits_ = true;
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//.. normalize with z=0 spectrum rather than zini spectrum?
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if( m_bz0norm )
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tf_withtotal0_ = true;
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else
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tf_withtotal0_ = false;
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read_table( );
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acc_dtot = gsl_interp_accel_alloc();
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acc_dcdm = gsl_interp_accel_alloc();
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acc_dbaryon = gsl_interp_accel_alloc();
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acc_vtot = gsl_interp_accel_alloc();
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acc_vcdm = gsl_interp_accel_alloc();
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acc_vbaryon = gsl_interp_accel_alloc();
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acc_dtot0 = gsl_interp_accel_alloc();
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spline_dtot = gsl_spline_alloc( gsl_interp_cspline, m_tab_k.size() );
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spline_dcdm = gsl_spline_alloc( gsl_interp_cspline, m_tab_k.size() );
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spline_dbaryon = 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 = gsl_spline_alloc( gsl_interp_cspline, m_tab_k.size() );
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spline_vbaryon = gsl_spline_alloc( gsl_interp_cspline, m_tab_k.size() );
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spline_dtot0 = gsl_spline_alloc( gsl_interp_cspline, m_tab_k.size() );
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gsl_spline_init (spline_dtot, &m_tab_k[0], &m_tab_Tk_tot[0], m_tab_k.size() );
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gsl_spline_init (spline_dcdm, &m_tab_k[0], &m_tab_Tk_cdm[0], m_tab_k.size() );
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gsl_spline_init (spline_dbaryon, &m_tab_k[0], &m_tab_Tk_baryon[0], m_tab_k.size() );
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gsl_spline_init (spline_vtot, &m_tab_k[0], &m_tab_Tvk_tot[0], m_tab_k.size() );
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gsl_spline_init (spline_vcdm, &m_tab_k[0], &m_tab_Tvk_cdm[0], m_tab_k.size() );
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gsl_spline_init (spline_vbaryon, &m_tab_k[0], &m_tab_Tvk_baryon[0], m_tab_k.size() );
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if( tf_withtotal0_ )
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gsl_spline_init (spline_dtot0, &m_tab_k[0], &m_tab_Tk_tot0[0], m_tab_k.size() );
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else
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gsl_spline_init (spline_dtot0, &m_tab_k[0], &m_tab_Tk_tot[0], m_tab_k.size() );
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}
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~transfer_LINGERpp_plugin()
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{
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gsl_spline_free (spline_dtot);
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gsl_spline_free (spline_dcdm);
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gsl_spline_free (spline_dbaryon);
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gsl_spline_free (spline_vtot);
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gsl_spline_free (spline_vcdm);
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gsl_spline_free (spline_vbaryon);
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gsl_spline_free (spline_dtot0);
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gsl_interp_accel_free (acc_dtot);
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gsl_interp_accel_free (acc_dcdm);
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gsl_interp_accel_free (acc_dbaryon);
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gsl_interp_accel_free (acc_vtot);
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gsl_interp_accel_free (acc_vcdm);
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gsl_interp_accel_free (acc_vbaryon);
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gsl_interp_accel_free (acc_dtot0);
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}
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inline double extrap_left( double k, const tf_type& type )
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{
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if( k<1e-8 )
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return 1.0;
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double v1(1.0), v2(1.0);
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switch( type )
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{
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case cdm:
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v1 = m_tab_Tk_cdm[0];
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v2 = m_tab_Tk_cdm[1];
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break;
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case baryon:
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v1 = m_tab_Tk_baryon[0];
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v2 = m_tab_Tk_baryon[1];
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break;
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case vtotal:
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v1 = m_tab_Tvk_tot[0];
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v2 = m_tab_Tvk_tot[1];
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break;
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case vcdm:
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v1 = m_tab_Tvk_cdm[0];
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v2 = m_tab_Tvk_cdm[1];
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break;
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case vbaryon:
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v1 = m_tab_Tvk_baryon[0];
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v2 = m_tab_Tvk_baryon[1];
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break;
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case total:
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v1 = m_tab_Tk_tot[0];
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v2 = m_tab_Tk_tot[1];
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break;
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case total0:
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v1 = m_tab_Tk_tot0[0];
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v2 = m_tab_Tk_tot0[1];
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break;
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default:
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throw std::runtime_error("Invalid type requested in transfer function evaluation");
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}
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double lk = log10(k);
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double dk = m_tab_k[1]-m_tab_k[0];
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double delk = lk-m_tab_k[0];
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//double xi = (v2-v1)/dk;
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return pow(10.0,(v2-v1)/dk*(delk)+v1);
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}
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inline double extrap_right( double k, const tf_type& type )
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{
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double v1(1.0), v2(1.0);
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int n=m_tab_k.size()-1, n1=n-1;
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switch( type )
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{
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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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break;
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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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break;
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case vtotal:
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v1 = m_tab_Tvk_tot[n1];
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v2 = m_tab_Tvk_tot[n];
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break;
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case vcdm:
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v1 = m_tab_Tvk_cdm[n1];
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v2 = m_tab_Tvk_cdm[n];
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break;
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case vbaryon:
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v1 = m_tab_Tvk_baryon[n1];
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v2 = m_tab_Tvk_baryon[n];
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break;
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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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break;
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case total0:
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v1 = m_tab_Tk_tot0[n1];
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v2 = m_tab_Tk_tot0[n];
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break;
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default:
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throw std::runtime_error("Invalid type requested in transfer function evaluation");
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}
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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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//double xi = (v2-v1)/dk;
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return pow(10.0,(v2-v1)/dk*(delk)+v2);
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}
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inline double compute( double k, tf_type type ){
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double lk = log10(k);
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//if( lk<m_tab_k[1])
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// return 1.0;
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//if( lk>m_tab_k[m_tab_k.size()-2] );
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// return m_tab_Tk_cdm[m_tab_k.size()-2]/k/k;
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if( k<get_kmin() )
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return extrap_left(k, type );
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if( k>get_kmax() )
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return extrap_right(k,type );
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switch( type )
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{
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case cdm:
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return pow(10.0, gsl_spline_eval (spline_dcdm, lk, acc_dcdm) );
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case baryon:
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return pow(10.0, gsl_spline_eval (spline_dbaryon, lk, acc_dbaryon) );
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case vtotal:
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return pow(10.0, gsl_spline_eval (spline_vtot, lk, acc_vtot) );
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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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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_dtot, lk, acc_dtot) );
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case total0:
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return pow(10.0, gsl_spline_eval (spline_dtot0, lk, acc_dtot0) );
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default:
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throw std::runtime_error("Invalid type requested in transfer function evaluation");
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}
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return 1.0;
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}
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inline double get_kmin( void ){
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return pow(10.0,m_tab_k[0]);
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}
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inline double get_kmax( void ){
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return pow(10.0,m_tab_k[m_tab_k.size()-1]);
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}
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};
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namespace{
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transfer_function_plugin_creator_concrete< transfer_LINGERpp_plugin > creator("linger++");
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}
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