Imported healpix tree

2025-07-05 07:41:11 +00:00 · 2012-10-30 13:56:48 -04:00 · 2012-10-30 13:56:48 -04:00 · 4bfb62f177
commit 4bfb62f177
parent 4182c30485
136 changed files with 26534 additions and 0 deletions
--- a/external/healpix/Healpix_cxx/anafast_cxx_module.cc
+++ b/external/healpix/Healpix_cxx/anafast_cxx_module.cc
@ -0,0 +1,129 @@
+/*
+ *  This file is part of Healpix_cxx.
+ *
+ *  Healpix_cxx 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Healpix_cxx 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 Healpix_cxx; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  For more information about HEALPix, see http://healpix.jpl.nasa.gov
+ */
+
+/*
+ *  Healpix_cxx is being developed at the Max-Planck-Institut fuer Astrophysik
+ *  and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
+ *  (DLR).
+ */
+
+/*
+ *  Copyright (C) 2003-2010 Max-Planck-Society
+ *  Author: Martin Reinecke
+ */
+
+#include "xcomplex.h"
+#include "cxxutils.h"
+#include "paramfile.h"
+#include "healpix_data_io.h"
+#include "alm.h"
+#include "alm_fitsio.h"
+#include "healpix_map.h"
+#include "healpix_map_fitsio.h"
+#include "powspec.h"
+#include "powspec_fitsio.h"
+#include "alm_healpix_tools.h"
+#include "alm_powspec_tools.h"
+#include "fitshandle.h"
+#include "levels_facilities.h"
+#include "lsconstants.h"
+
+using namespace std;
+
+namespace {
+
+template<typename T> void anafast_cxx (paramfile &params)
+  {
+  int nlmax = params.template find<int>("nlmax");
+  int nmmax = params.template find<int>("nmmax",nlmax);
+  string infile = params.template find<string>("infile");
+  string outfile = params.template find<string>("outfile","");
+  string outfile_alms = params.template find<string>("outfile_alms","");
+  planck_assert ((outfile!="") || (outfile_alms!=""),
+    "no output specified, nothing done");
+  bool polarisation = params.template find<bool>("polarisation");
+  int num_iter = params.template find<int>("iter_order",0);
+
+  if (!polarisation)
+    {
+    Healpix_Map<T> map;
+    read_Healpix_map_from_fits(infile,map,1,2);
+    arr<double> weight;
+    get_ring_weights (params,map.Nside(),weight);
+
+    Alm<xcomplex<T> > alm(nlmax,nmmax);
+    double avg=map.average();
+    map.Add(T(-avg));
+    if (map.Scheme()==NEST) map.swap_scheme();
+    map2alm_iter(map,alm,num_iter,weight);
+
+    alm(0,0) += T(avg*sqrt(fourpi));
+
+    if (outfile!="")
+      {
+      PowSpec powspec;
+      extract_powspec (alm,powspec);
+      write_powspec_to_fits (outfile,powspec,1);
+      }
+    if (outfile_alms!="")
+      write_Alm_to_fits(outfile_alms,alm,nlmax,nmmax,planckType<T>());
+    }
+  else
+    {
+    Healpix_Map<T> mapT, mapQ, mapU;
+    read_Healpix_map_from_fits(infile,mapT,mapQ,mapU,2);
+    arr<double> weight;
+    get_ring_weights (params,mapT.Nside(),weight);
+
+    Alm<xcomplex<T> > almT(nlmax,nmmax), almG(nlmax,nmmax), almC(nlmax,nmmax);
+    double avg=mapT.average();
+    mapT.Add(T(-avg));
+    if (mapT.Scheme()==NEST) mapT.swap_scheme();
+    if (mapQ.Scheme()==NEST) mapQ.swap_scheme();
+    if (mapU.Scheme()==NEST) mapU.swap_scheme();
+    map2alm_pol_iter
+      (mapT,mapQ,mapU,almT,almG,almC,num_iter,weight);
+
+    almT(0,0) += T(avg*sqrt(fourpi));
+
+    if (outfile!="")
+      {
+      PowSpec powspec;
+      extract_powspec (almT,almG,almC,powspec);
+      params.template find<bool>("full_powerspectrum",false) ?
+        write_powspec_to_fits (outfile,powspec,6) :
+        write_powspec_to_fits (outfile,powspec,4);
+      }
+    if (outfile_alms!="")
+      write_Alm_to_fits (outfile_alms,almT,almG,almC,nlmax,nmmax,planckType<T>());
+    }
+  }
+
+} // unamed namespace
+
+int anafast_cxx_module (int argc, const char **argv)
+  {
+  module_startup ("anafast_cxx", argc, argv, 2, "<parameter file>");
+  paramfile params (argv[1]);
+
+  bool dp = params.find<bool> ("double_precision",false);
+  dp ? anafast_cxx<double>(params) : anafast_cxx<float>(params);
+  return 0;
+  }