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More comments to bessels.h 

Former-commit-id: b0a922527c704ac1532db6042239bddab641915c
This commit is contained in:
Marek Nečada 2018-05-14 07:04:05 +03:00
parent c0f23fce55
commit 2da546f7c2
1 changed files with 9 additions and 3 deletions
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12
qpms/bessels.h
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@ -28,20 +28,26 @@ hankelcoeffs_get(complex double const * const hankelcoefftable, size_t n){
return trindex_cd(hankelcoefftable, n); return trindex_cd(hankelcoefftable, n);
} }
/* Compute the untransformed long- (optional) and short-range parts of spherical Hankel functions */
// general; target_longrange and target_shortrange are of size (maxn+1) // general; target_longrange and target_shortrange are of size (maxn+1)
// if target_longrange is NULL, only the short-range part is calculated // if target_longrange is NULL, only the short-range part is calculated
void hankelparts_fill(complex double *target_longrange, complex double *target_shortrange, void hankelparts_fill(complex double *target_longrange, /* Not needed for the actual calculations
(only for testing and error estimates)
as summed in the reciprocal space:
pass NULL to omit */
complex double *target_shortrange,
size_t maxn, size_t longrange_order_cutoff, /* terms e**(I x)/x**(k+1), size_t maxn, size_t longrange_order_cutoff, /* terms e**(I x)/x**(k+1),
k>= longrange_order_cutoff go k>= longrange_order_cutoff go
completely to short-range part */ completely to short-range part */
complex double const * const hankelcoefftable, complex double const * const hankelcoefftable,
unsigned kappa, double vc, double x); // x = k0 * r unsigned kappa, double c, /* regularisation "slope" */
double x); // x = k0 * r
/* Hankel transforms of the long-range parts of the spherical Hankel functions */ /* Hankel transforms of the long-range parts of the spherical Hankel functions */
// this declaration is general; however, the implementation // this declaration is general; however, the implementation
// is so far only for kappa == 5, maxp == 5 TODO // is so far only for kappa == 5, maxp <= 5, longrange_order_cutoff <= 1
void lrhankel_recpart_fill(complex double *target_longrange_kspace /*Must be of size maxn*(maxn+1)/2*/, void lrhankel_recpart_fill(complex double *target_longrange_kspace /*Must be of size maxn*(maxn+1)/2*/,
size_t maxp /* Max. degree of transformed spherical Hankel function, size_t maxp /* Max. degree of transformed spherical Hankel function,
also the max. order of the Hankel transform */, also the max. order of the Hankel transform */,