23char circhebp_C[] =
"$Header: /cvsroot/Lorene/C++/Source/Non_class_members/Coef/FFTW3/circhebp.C,v 1.3 2014/10/13 08:53:20 j_novak Exp $" ;
131fftw_plan back_fft(
int, Tbl*&) ;
132double* cheb_ini(
const int) ;
135void circhebp(
const int* deg,
const int* dimc,
double* cf,
136 const int* dimf,
double* ff)
154 cout <<
"circhebp: nr > n3c : nr = " << nr <<
" , n3c = "
160 cout <<
"circhebp: nr > n3f : nr = " << nr <<
" , n3f = "
166 cout <<
"circhebp: n1c > n1f : n1c = " << n1c <<
" , n1f = "
172 cout <<
"circhebp: n2c > n2f : n2c = " << n2c <<
" , n2f = "
184 fftw_plan p = back_fft(nm1, pg) ;
188 double* sinp = cheb_ini(nr);
192 int n2n3f = n2f * n3f ;
193 int n2n3c = n2c * n3c ;
201 int borne_phi = ( n1c > 1 ) ? n1c-1 : 1 ;
203 for (j=0; j< borne_phi; j++) {
207 for (k=0; k<n2c; k++) {
209 int i0 = n2n3c * j + n3c * k ;
210 double* cf0 = cf + i0 ;
212 i0 = n2n3f * j + n3f * k ;
213 double* ff0 = ff + i0 ;
231 for ( i = 3; i < nr; i += 2 ) {
232 ff0[i] = cf0[i] - c1 ;
237 double fmoins0 = nm1s2 * c1 + som ;
242 for ( i = 3; i < nr; i += 2 ) {
243 g.set(nm1-i/2) = 0.25 * ( ff0[i] - ff0[i-2] ) ;
255 for (i=1; i<nm1s2; i++) g.set(i) = 0.5 * cf0[2*i] ;
256 g.set(nm1s2) = cf0[nm1] ;
267 for ( i = 1; i < nm1s2 ; i++ ) {
273 int ixsym = nm1 - isym ;
275 double fp = .5 * ( g(i) + g(isym) ) ;
276 double fm = .5 * ( g(i) - g(isym) ) / sinp[i] ;
279 ff0[ixsym] = fp - fm ;
283 ff0[0] = g(0) - fmoins0 ;
284 ff0[nm1] = g(0) + fmoins0 ;
285 ff0[nm1s2] = g(nm1s2) ;