anafast_cxx_module.cc

00001 /*
00002  *  This file is part of Healpix_cxx.
00003  *
00004  *  Healpix_cxx is free software; you can redistribute it and/or modify
00005  *  it under the terms of the GNU General Public License as published by
00006  *  the Free Software Foundation; either version 2 of the License, or
00007  *  (at your option) any later version.
00008  *
00009  *  Healpix_cxx is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *  GNU General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU General Public License
00015  *  along with Healpix_cxx; if not, write to the Free Software
00016  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00017  *
00018  *  For more information about HEALPix, see http://healpix.sourceforge.net
00019  */
00020 
00021 /*
00022  *  Healpix_cxx is being developed at the Max-Planck-Institut fuer Astrophysik
00023  *  and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
00024  *  (DLR).
00025  */
00026 
00027 /*
00028  *  Copyright (C) 2003-2010 Max-Planck-Society
00029  *  Author: Martin Reinecke
00030  */
00031 
00032 #include "xcomplex.h"
00033 #include "paramfile.h"
00034 #include "healpix_data_io.h"
00035 #include "alm.h"
00036 #include "alm_fitsio.h"
00037 #include "healpix_map.h"
00038 #include "healpix_map_fitsio.h"
00039 #include "powspec.h"
00040 #include "powspec_fitsio.h"
00041 #include "alm_healpix_tools.h"
00042 #include "alm_powspec_tools.h"
00043 #include "fitshandle.h"
00044 #include "levels_facilities.h"
00045 #include "lsconstants.h"
00046 #include "announce.h"
00047 
00048 using namespace std;
00049 
00050 namespace {
00051 
00052 template<typename T> void anafast_cxx (paramfile &params)
00053   {
00054   int nlmax = params.template find<int>("nlmax");
00055   int nmmax = params.template find<int>("nmmax",nlmax);
00056   string infile = params.template find<string>("infile");
00057   string outfile = params.template find<string>("outfile","");
00058   string outfile_alms = params.template find<string>("outfile_alms","");
00059   planck_assert ((outfile!="") || (outfile_alms!=""),
00060     "no output specified, nothing done");
00061   bool polarisation = params.template find<bool>("polarisation");
00062   int num_iter = params.template find<int>("iter_order",0);
00063 
00064   if (!polarisation)
00065     {
00066     Healpix_Map<T> map;
00067     read_Healpix_map_from_fits(infile,map,1,2);
00068     tsize nmod = map.replaceUndefWith0();
00069     if (nmod!=0)
00070       cout << "WARNING: replaced " << nmod <<
00071               " undefined map pixels with a value of 0" << endl;
00072 
00073     arr<double> weight;
00074     get_ring_weights (params,map.Nside(),weight);
00075 
00076     Alm<xcomplex<T> > alm(nlmax,nmmax);
00077     double avg=map.average();
00078     map.Add(T(-avg));
00079     if (map.Scheme()==NEST) map.swap_scheme();
00080     map2alm_iter(map,alm,num_iter,weight);
00081 
00082     alm(0,0) += T(avg*sqrt(fourpi));
00083 
00084     if (outfile!="")
00085       {
00086       PowSpec powspec;
00087       extract_powspec (alm,powspec);
00088       write_powspec_to_fits (outfile,powspec,1);
00089       }
00090     if (outfile_alms!="")
00091       write_Alm_to_fits(outfile_alms,alm,nlmax,nmmax,planckType<T>());
00092     }
00093   else
00094     {
00095     Healpix_Map<T> mapT, mapQ, mapU;
00096     read_Healpix_map_from_fits(infile,mapT,mapQ,mapU,2);
00097     tsize nmod = mapT.replaceUndefWith0()+mapT.replaceUndefWith0()
00098                 +mapU.replaceUndefWith0();
00099     if (nmod!=0)
00100       cout << "WARNING: replaced " << nmod <<
00101               " undefined map pixels with a value of 0" << endl;
00102 
00103     arr<double> weight;
00104     get_ring_weights (params,mapT.Nside(),weight);
00105 
00106     Alm<xcomplex<T> > almT(nlmax,nmmax), almG(nlmax,nmmax), almC(nlmax,nmmax);
00107     double avg=mapT.average();
00108     mapT.Add(T(-avg));
00109     if (mapT.Scheme()==NEST) mapT.swap_scheme();
00110     if (mapQ.Scheme()==NEST) mapQ.swap_scheme();
00111     if (mapU.Scheme()==NEST) mapU.swap_scheme();
00112     map2alm_pol_iter
00113       (mapT,mapQ,mapU,almT,almG,almC,num_iter,weight);
00114 
00115     almT(0,0) += T(avg*sqrt(fourpi));
00116 
00117     if (outfile!="")
00118       {
00119       PowSpec powspec;
00120       extract_powspec (almT,almG,almC,powspec);
00121       params.template find<bool>("full_powerspectrum",false) ?
00122         write_powspec_to_fits (outfile,powspec,6) :
00123         write_powspec_to_fits (outfile,powspec,4);
00124       }
00125     if (outfile_alms!="")
00126       write_Alm_to_fits (outfile_alms,almT,almG,almC,nlmax,nmmax,planckType<T>());
00127     }
00128   }
00129 
00130 } // unamed namespace
00131 
00132 int anafast_cxx_module (int argc, const char **argv)
00133   {
00134   module_startup ("anafast_cxx", argc, argv);
00135   paramfile params (getParamsFromCmdline(argc,argv));
00136 
00137   bool dp = params.find<bool> ("double_precision",false);
00138   dp ? anafast_cxx<double>(params) : anafast_cxx<float>(params);
00139   return 0;
00140   }

Generated on Wed Apr 24 11:31:18 2013 for Healpix C++