69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
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* This file is part of libsharp.
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*
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* libsharp is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* libsharp is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libsharp; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* libsharp is being developed at the Max-Planck-Institut fuer Astrophysik
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* and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
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* (DLR).
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*/
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/*! \file sharp_almhelpers.c
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* Spherical transform library
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*
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* Copyright (C) 2008-2011 Max-Planck-Society
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* \author Martin Reinecke
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*/
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#include "sharp_almhelpers.h"
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#include "c_utils.h"
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void sharp_make_triangular_alm_info (int lmax, int mmax, int stride,
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sharp_alm_info **alm_info)
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{
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sharp_alm_info *info = RALLOC(sharp_alm_info,1);
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info->lmax = lmax;
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info->nm = mmax+1;
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info->mval = RALLOC(int,mmax+1);
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info->mvstart = RALLOC(ptrdiff_t,mmax+1);
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info->stride = stride;
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int tval = 2*lmax+1;
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for (ptrdiff_t m=0; m<=mmax; ++m)
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{
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info->mval[m] = m;
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info->mvstart[m] = stride*((m*(tval-m))>>1);
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}
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*alm_info = info;
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}
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void sharp_make_rectangular_alm_info (int lmax, int mmax, int stride,
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sharp_alm_info **alm_info)
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{
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sharp_alm_info *info = RALLOC(sharp_alm_info,1);
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info->lmax = lmax;
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info->nm = mmax+1;
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info->mval = RALLOC(int,mmax+1);
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info->mvstart = RALLOC(ptrdiff_t,mmax+1);
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info->stride = stride;
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for (ptrdiff_t m=0; m<=mmax; ++m)
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{
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info->mval[m] = m;
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info->mvstart[m] = stride*m*(lmax+1);
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}
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*alm_info = info;
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}
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