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/*
* Recursive computation of (arbitrary degree) spherical harmonics,
* according to Gumerov and Duraiswami,
* "The Fast Multipole Methods for the Helmholtz Equation in Three Dimensions",
* Elsevier, 2005.
*
* Implementation by Franz Zotter, Institute of Electronic Music and Acoustics
* (IEM), University of Music and Dramatic Arts (KUG), Graz, Austria
* http://iem.at/Members/zotter, 2007.
*
* This code is published under the Gnu General Public License, see
* "LICENSE.txt"
*/
#ifndef _sh_h__
#define _sh_h__
#include <stdlib.h>
#include "legendre_a.h"
#include "chebyshev12.h"
#include "sharmonics_normalization.h"
typedef struct _SHWorkSpace_
{
size_t nmax;
size_t l;
double *y;
SHNorml *wn;
Cheby12WorkSpace *wc;
LegendreWorkSpace *wl;
} SHWorkSpace;
SHWorkSpace *sharmonics_alloc(size_t nmax, size_t l);
void sharmonics_free(SHWorkSpace *sh);
void sharmonics(double *phi, double *theta, SHWorkSpace *ws);
#endif
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