Imported healpix tree

external/healpix/Healpix_cxx/alm2map_cxx_module.cc

@@ -0,0 +1,125 @@
+/*
+ *  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 "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 alm2map_cxx (paramfile &params)
+  {
+  int nlmax = params.template find<int>("nlmax");
+  int nmmax = params.template find<int>("nmmax",nlmax);
+  planck_assert(nmmax<=nlmax,"nmmax must not be larger than nlmax");
+  string infile = params.template find<string>("infile");
+  string outfile = params.template find<string>("outfile");
+  int nside = params.template find<int>("nside");
+  double fwhm = arcmin2rad*params.template find<double>("fwhm_arcmin",0);
+
+  arr<double> temp, pol;
+  get_pixwin (params,nlmax,nside,temp,pol);
+
+  bool deriv = params.template find<bool>("derivatives",false);
+  if (deriv)
+    {
+    Alm<xcomplex<T> > alm;
+    read_Alm_from_fits(infile,alm,nlmax,nmmax,2);
+    if (fwhm>0) smoothWithGauss (alm, fwhm);
+    Healpix_Map<T> map(nside,RING,SET_NSIDE),
+                   mapdth(nside,RING,SET_NSIDE),
+                   mapdph(nside,RING,SET_NSIDE);
+    alm.ScaleL(temp);
+
+    double offset = alm(0,0).real()/sqrt(fourpi);
+    alm(0,0) = 0;
+    alm2map_der1(alm,map,mapdth,mapdph);
+    map.Add(T(offset));
+    write_Healpix_map_to_fits (outfile,map,mapdth,mapdph,planckType<T>());
+    return;
+    }
+
+  bool polarisation = params.template find<bool>("polarisation");
+  if (!polarisation)
+    {
+    Alm<xcomplex<T> > alm;
+    read_Alm_from_fits(infile,alm,nlmax,nmmax,2);
+    if (fwhm>0) smoothWithGauss (alm, fwhm);
+    Healpix_Map<T> map(nside,RING,SET_NSIDE);
+    alm.ScaleL(temp);
+
+    double offset = alm(0,0).real()/sqrt(fourpi);
+    alm(0,0) = 0;
+    alm2map(alm,map);
+    map.Add(T(offset));
+    write_Healpix_map_to_fits (outfile,map,planckType<T>());
+    }
+  else
+    {
+    Alm<xcomplex<T> > almT, almG, almC;
+    read_Alm_from_fits(infile,almT,almG,almC,nlmax,nmmax,2);
+    if (fwhm>0) smoothWithGauss (almT, almG, almC, fwhm);
+    Healpix_Map<T> mapT(nside,RING,SET_NSIDE), mapQ(nside,RING,SET_NSIDE),
+                   mapU(nside,RING,SET_NSIDE);
+    almT.ScaleL(temp);
+    almG.ScaleL(pol); almC.ScaleL(pol);
+
+    double offset = almT(0,0).real()/sqrt(fourpi);
+    almT(0,0) = 0;
+    alm2map_pol(almT,almG,almC,mapT,mapQ,mapU);
+    mapT.Add(T(offset));
+    write_Healpix_map_to_fits (outfile,mapT,mapQ,mapU,planckType<T>());
+    }
+  }
+
+} // unnamed namespace
+
+int alm2map_cxx_module (int argc, const char **argv)
+  {
+  module_startup ("alm2map_cxx", argc, argv, 2, "<parameter file>");
+  paramfile params (argv[1]);
+
+  bool dp = params.find<bool> ("double_precision",false);
+  dp ? alm2map_cxx<double>(params) : alm2map_cxx<float>(params);
+  return 0;
+  }