Aquila-Consortium/libsharp2
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first try; broken

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This commit is contained in:
Martin Reinecke 2018-12-18 13:45:25 +01:00
parent d257e92e54
commit 202507ecaa
3 changed files with 78 additions and 4 deletions
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26
libsharp/sharp_ylmgen_c.c
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@ -74,13 +74,17 @@ void sharp_Ylmgen_init (sharp_Ylmgen_C *gen, int l_max, int m_max, int spin)
gen->mfac[0] = inv_sqrt4pi;
for (int m=1; m<=gen->mmax; ++m)
gen->mfac[m] = gen->mfac[m-1]*sqrt((2*m+1.)/(2*m));
gen->root = RALLOC(double,2*gen->lmax+5);
gen->iroot = RALLOC(double,2*gen->lmax+5);
for (int m=0; m<2*gen->lmax+5; ++m)
gen->root = RALLOC(double,2*gen->lmax+6);
gen->iroot = RALLOC(double,2*gen->lmax+6);
for (int m=0; m<2*gen->lmax+6; ++m)
{
gen->root[m] = sqrt(m);
gen->iroot[m] = (m==0) ? 0. : 1./gen->root[m];
}
gen->eps=RALLOC(double, gen->lmax+10);
gen->alpha=RALLOC(double, gen->lmax/2+10);
gen->a=RALLOC(double, gen->lmax/2+10);
gen->b=RALLOC(double, gen->lmax/2+10);
}
else
{
@ -137,6 +141,10 @@ void sharp_Ylmgen_destroy (sharp_Ylmgen_C *gen)
DEALLOC(gen->mfac);
DEALLOC(gen->root);
DEALLOC(gen->iroot);
DEALLOC(gen->eps);
DEALLOC(gen->alpha);
DEALLOC(gen->a);
DEALLOC(gen->b);
}
else
{
@ -165,6 +173,18 @@ void sharp_Ylmgen_prepare (sharp_Ylmgen_C *gen, int m)
gen->rf[l].f[0] = tmp*gen->root[2*l+1];
gen->rf[l].f[1] = tmp*gen->root[l+m]*gen->root[l-m]*gen->iroot[2*l-1];
}
for (int l=m; l<gen->lmax+10; ++l)
gen->eps[l] = sqrt((l*l-m*m)/(4.*l*l-1));
gen->alpha[0] = 1./gen->eps[m+1];
gen->alpha[1] = gen->eps[m+1]/(gen->eps[m+2]*gen->eps[m+3]);
for (int il=1, l=m+2; l<gen->lmax+5; ++il, l+=2)
gen->alpha[il+1]= ((il&1) ? -1 : 1)/(gen->eps[l+2]*gen->eps[l+3]*gen->alpha[il]);
for (int il=0, l=m; l<gen->lmax+5; ++il, l+=2)
{
gen->a[il] = ((il&1) ? -1 : 1)*gen->alpha[il]*gen->alpha[il];
double t1 = gen->eps[l+2], t2 = gen->eps[l+1];
gen->b[il] = -gen->a[il]*(t1*t1+t2*t2);
}
}
else
{