23char citcosi_C[] =
"$Header: /cvsroot/Lorene/C++/Source/Non_class_members/Coef/FFTW3/citcosi.C,v 1.3 2014/10/13 08:53:20 j_novak Exp $" ;
132fftw_plan back_fft(
int, Tbl*&) ;
133double* cheb_ini(
const int) ;
134double* chebimp_ini(
const int ) ;
137void citcosi(
const int* deg,
const int* dimc,
double* cf,
const int* dimf,
156 cout <<
"citcosi: nt > n2f : nt = " << nt <<
" , n2f = "
161 cout <<
"citcosi: nt > n2c : nt = " << nt <<
" , n2c = "
165 if ( (n1f > 1) && (n1c > n1f) ) {
166 cout <<
"citcosi: n1c > n1f : n1c = " << n1c <<
" , n1f = "
171 cout <<
"citcosi: n3c > n3f : n3c = " << n3c <<
" , n3f = "
182 fftw_plan p = back_fft(nm1, pg) ;
184 double* t1 =
new double[nt] ;
187 double* sinp = cheb_ini(nt) ;
190 double* x = chebimp_ini(nt) ;
194 int n2n3f = n2f * n3f ;
195 int n2n3c = n2c * n3c ;
203 int borne_phi = n1c-1 ;
204 if (n1f == 1) borne_phi = 1 ;
206 for (j=0; j< borne_phi; j++) {
210 for (k=0; k<n3c; k++) {
212 int i0 = n2n3c * j + k ;
213 double* cf0 = cf + i0 ;
216 double* ff0 = ff + i0 ;
221 t1[0] = .5 * cf0[0] ;
222 for (i=1; i<nm1; i++) t1[i] = .5 * ( cf0[n3c*i] + cf0[n3c*(i-1)] ) ;
223 t1[nm1] = .5 * cf0[n3c*(nt-2)] ;
241 for ( i = 3; i < nt; i += 2 ) {
242 ff0[ n3f*i ] = t1[i] - c1 ;
243 som += ff0[ n3f*i ] ;
247 double fmoins0 = nm1s2 * c1 + som ;
252 for ( i = 3; i < nt; i += 2 ) {
253 g.set(nm1-i/2) = 0.25 * ( ff0[ n3f*i ] - ff0[ n3f*(i-2) ] ) ;
265 for (i=1; i<nm1s2; i++ ) g.set(i) = 0.5 * t1[2*i] ;
266 g.set(nm1s2) = t1[nm1] ;
277 for ( i = 1; i < nm1s2 ; i++ ) {
281 double fp = 0.5 * ( g(i) + g(isym) ) ;
282 double fm = 0.5 * ( g(i) - g(isym) ) / sinp[i] ;
283 ff0[ n3f*i ] = ( fp + fm ) / x[isym] ;
284 ff0[ n3f*isym ] = ( fp - fm ) / x[i] ;
288 ff0[0] = g(0) + fmoins0 ;
290 ff0[ n3f*nm1s2 ] = g(nm1s2) / x[nm1s2] ;