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cosmotool/external/sharp/libsharp/sharp_acctest.c
Guilhem Lavaux bddd26a5ca Fixed error message. Imported libsharp
2012-11-10 09:01:12 -05:00

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/*
* This file is part of libsharp.
*
* libsharp 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.
*
* libsharp 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 libsharp; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* libsharp is being developed at the Max-Planck-Institut fuer Astrophysik
* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
* (DLR).
*/
/*! \file sharp_acctest.c
Systematic accuracy test for libsharp.
Copyright (C) 2006-2012 Max-Planck-Society
\author Martin Reinecke
*/
#include <stdio.h>
#include <string.h>
#ifdef USE_MPI
#include "mpi.h"
#endif
#include "sharp.h"
#include "sharp_geomhelpers.h"
#include "sharp_almhelpers.h"
#include "c_utils.h"
#include "sharp_announce.h"
#include "sharp_core.h"
typedef complex double dcmplx;
static double drand (double min, double max)
{ return min + (max-min)*rand()/(RAND_MAX+1.0); }
static void random_alm (dcmplx *alm, sharp_alm_info *helper, int spin)
{
for (int mi=0;mi<helper->nm; ++mi)
{
int m=helper->mval[mi];
for (int l=m;l<=helper->lmax; ++l)
{
if ((l<spin)&&(m<spin))
alm[sharp_alm_index(helper,l,mi)] = 0.;
else
{
double rv = drand(-1,1);
double iv = (m==0) ? 0 : drand(-1,1);
alm[sharp_alm_index(helper,l,mi)] = rv+_Complex_I*iv;
}
}
}
}
static void measure_errors (dcmplx **alm, dcmplx **alm2,
ptrdiff_t nalms, int ncomp)
{
for (int i=0; i<ncomp; ++i)
{
double sum=0, sum2=0, maxdiff=0;
for (ptrdiff_t m=0; m<nalms; ++m)
{
double x=creal(alm[i][m])-creal(alm2[i][m]),
y=cimag(alm[i][m])-cimag(alm2[i][m]);
sum+=x*x+y*y;
sum2+=creal(alm[i][m])*creal(alm[i][m])+cimag(alm[i][m])*cimag(alm[i][m]);
if (fabs(x)>maxdiff) maxdiff=fabs(x);
if (fabs(y)>maxdiff) maxdiff=fabs(y);
}
sum=sqrt(sum/nalms);
sum2=sqrt(sum2/nalms);
UTIL_ASSERT((maxdiff<1e-10)&&(sum/sum2<1e-10),"error");
}
}
static void check_sign_scale(void)
{
int lmax=50;
int mmax=lmax;
sharp_geom_info *tinfo;
int nrings=lmax+1;
int ppring=2*lmax+2;
ptrdiff_t npix=(ptrdiff_t)nrings*ppring;
sharp_make_gauss_geom_info (nrings, ppring, 1, ppring, &tinfo);
/* flip theta to emulate the "old" Gaussian grid geometry */
for (int i=0; i<tinfo->npairs; ++i)
{
const double pi=3.141592653589793238462643383279502884197;
tinfo->pair[i].r1.cth=-tinfo->pair[i].r1.cth;
tinfo->pair[i].r2.cth=-tinfo->pair[i].r2.cth;
tinfo->pair[i].r1.theta=pi-tinfo->pair[i].r1.theta;
tinfo->pair[i].r2.theta=pi-tinfo->pair[i].r2.theta;
}
sharp_alm_info *alms;
sharp_make_triangular_alm_info(lmax,mmax,1,&alms);
ptrdiff_t nalms = ((mmax+1)*(mmax+2))/2 + (mmax+1)*(lmax-mmax);
for (int ntrans=1; ntrans<10; ++ntrans)
{
double **map;
ALLOC2D(map,double,2*ntrans,npix);
dcmplx **alm;
ALLOC2D(alm,dcmplx,2*ntrans,nalms);
for (int i=0; i<2*ntrans; ++i)
for (int j=0; j<nalms; ++j)
alm[i][j]=1.+_Complex_I;
sharp_execute(SHARP_ALM2MAP,0,0,&alm[0],&map[0],tinfo,alms,ntrans,1,0,NULL,
NULL);
for (int it=0; it<ntrans; ++it)
{
UTIL_ASSERT(FAPPROX(map[it][0 ], 3.588246976618616912e+00,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[it][npix/2], 4.042209792157496651e+01,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[it][npix-1],-1.234675107554816442e+01,1e-12),
"error");
}
sharp_execute(SHARP_ALM2MAP,1,0,&alm[0],&map[0],tinfo,alms,ntrans,1,0,NULL,
NULL);
for (int it=0; it<ntrans; ++it)
{
UTIL_ASSERT(FAPPROX(map[2*it ][0 ], 2.750897760535633285e+00,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it ][npix/2], 3.137704477368562905e+01,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it ][npix-1],-8.405730859837063917e+01,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][0 ],-2.398026536095463346e+00,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][npix/2],-4.961140548331700728e+01,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][npix-1],-1.412765834230440021e+01,1e-12),
"error");
}
sharp_execute(SHARP_ALM2MAP,2,0,&alm[0],&map[0],tinfo,alms,ntrans,1,0,NULL,
NULL);
for (int it=0; it<ntrans; ++it)
{
UTIL_ASSERT(FAPPROX(map[2*it ][0 ],-1.398186224727334448e+00,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it ][npix/2],-2.456676000884031197e+01,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it ][npix-1],-1.516249174408820863e+02,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][0 ],-3.173406200299964119e+00,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][npix/2],-5.831327404513146462e+01,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][npix-1],-1.863257892248353897e+01,1e-12),
"error");
}
sharp_execute(SHARP_ALM2MAP_DERIV1,1,0,&alm[0],&map[0],tinfo,alms,ntrans,1,
0,NULL,NULL);
for (int it=0; it<ntrans; ++it)
{
UTIL_ASSERT(FAPPROX(map[2*it ][0 ],-6.859393905369091105e-01,1e-11),
"error");
UTIL_ASSERT(FAPPROX(map[2*it ][npix/2],-2.103947835973212364e+02,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it ][npix-1],-1.092463246472086439e+03,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][0 ],-1.411433220713928165e+02,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][npix/2],-1.146122859381925082e+03,1e-12),
"error");
UTIL_ASSERT(FAPPROX(map[2*it+1][npix-1], 7.821618677689795049e+02,1e-12),
"error");
}
DEALLOC2D(map);
DEALLOC2D(alm);
}
sharp_destroy_alm_info(alms);
sharp_destroy_geom_info(tinfo);
}
static void check_accuracy (sharp_geom_info *tinfo, ptrdiff_t lmax,
ptrdiff_t mmax, ptrdiff_t npix, int spin, int ntrans, int nv)
{
ptrdiff_t nalms = ((mmax+1)*(mmax+2))/2 + (mmax+1)*(lmax-mmax);
int ncomp = ntrans*((spin==0) ? 1 : 2);
double **map;
ALLOC2D(map,double,ncomp,npix);
sharp_alm_info *alms;
sharp_make_triangular_alm_info(lmax,mmax,1,&alms);
srand(4);
dcmplx **alm;
ALLOC2D(alm,dcmplx,ncomp,nalms);
for (int i=0; i<ncomp; ++i)
random_alm(alm[i],alms,spin);
dcmplx **alm2;
ALLOC2D(alm2,dcmplx,ncomp,nalms);
sharp_execute(SHARP_ALM2MAP,spin,0,&alm[0],&map[0],tinfo,alms,ntrans,1,nv,
NULL,NULL);
sharp_execute(SHARP_MAP2ALM,spin,0,&alm2[0],&map[0],tinfo,alms,ntrans,1,nv,
NULL,NULL);
measure_errors(alm,alm2,nalms,ncomp);
DEALLOC2D(map);
DEALLOC2D(alm);
DEALLOC2D(alm2);
sharp_destroy_alm_info(alms);
}
int main(void)
{
#ifdef USE_MPI
MPI_Init(NULL,NULL);
#endif
sharp_module_startup("sharp_acctest",1,1,"",1);
int lmax=127;
printf("Checking signs and scales.\n");
check_sign_scale();
printf("Passed.\n\n");
printf("Testing map analysis accuracy.\n");
sharp_geom_info *tinfo;
int nrings=lmax+1;
int ppring=2*lmax+2;
ptrdiff_t npix=(ptrdiff_t)nrings*ppring;
sharp_make_gauss_geom_info (nrings, ppring, 1, ppring, &tinfo);
for (int nv=1; nv<=6; ++nv)
for (int ntrans=1; ntrans<=6; ++ntrans)
{
check_accuracy(tinfo,lmax,lmax,npix,0,ntrans,nv);
check_accuracy(tinfo,lmax,lmax,npix,1,ntrans,nv);
check_accuracy(tinfo,lmax,lmax,npix,2,ntrans,nv);
check_accuracy(tinfo,lmax,lmax,npix,3,ntrans,nv);
check_accuracy(tinfo,lmax,lmax,npix,30,ntrans,nv);
}
sharp_destroy_geom_info(tinfo);
printf("Passed.\n\n");
#ifdef USE_MPI
MPI_Finalize();
#endif
return 0;
}
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