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/*
* Test code for LORENE class Valeur and PGPLOT
*/
/*
* Copyright (c) 2001 Eric Gourgoulhon
*
* This file is part of LORENE.
*
* LORENE is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* LORENE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LORENE; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*
* $Id: test_fft.C,v 1.6 2014/10/13 08:54:08 j_novak Exp $
* $Log: test_fft.C,v $
* Revision 1.6 2014/10/13 08:54:08 j_novak
* Lorene classes and functions now belong to the namespace Lorene.
*
* Revision 1.5 2010/01/31 16:37:29 e_gourgoulhon
* The number of points is no longer asked to the user but set to 16.
*
* Revision 1.4 2005/11/02 13:04:28 p_grandclement
* small change in test_fft.C
*
* Revision 1.3 2003/09/09 08:24:43 j_novak
* *** empty log message ***
*
* Revision 1.2 2002/10/16 14:37:19 j_novak
* Reorganization of #include instructions of standard C++, in order to
* use experimental version 3 of gcc.
*
* Revision 1.1.1.1 2001/11/20 15:19:31 e_gourgoulhon
* LORENE
*
*
* $Header: /cvsroot/Lorene/Test/test_fft.C,v 1.6 2014/10/13 08:54:08 j_novak Exp $
*
*/
// Lorene headers
#include "valeur.h"
#include "map.h"
#include "graphique.h"
using namespace Lorene ;
int main(){
// Nombre de points
// ----------------
int np ;
// cout << "Nombre de points ? " ;
// cin >> np ;
// cout << endl ;
//while ( cin.get()!='\n' ) ;
np = 16 ;
// Construction de la grille
// -------------------------
int nz = 1 ;
int nbr[] = {1} ;
int type_r[] = {RARE} ;
int nbt[] = {1} ;
int type_t = SYM ;
int nbp[] = {np} ;
int type_p = NONSYM ;
Mg3d mg(nz, nbr, type_r, nbt, type_t, nbp, type_p) ;
// Construction du mapping associe
// -------------------------------
double r_limits[] = {0,1} ;
Map_af mp(mg, r_limits) ;
// Phi
// ---
const Coord& phi = mp.phi ;
// Valeur de la fonction
// ---------------------
Valeur ff(mg) ;
ff = pow(cos(phi),5) ;
cout << "f : " << endl ;
cout << ff << endl ;
// Transformation de Fourier
// -------------------------
ff.std_base_scal() ; // definit la base spectrale a utiliser (Fourier)
ff.coef() ; // effectue la transformation de Fourier
cout << "Coefficients of the Fourier transform of f : " << endl ;
ff.affiche_seuil(cout) ;
// Dessin des coefficients de Fourier
// ----------------------------------
des_coef_phi(ff, 0, 0, 0, 1.e-14, "log|C_k|","Fourier coefficients") ;
// Fin du programme
// ----------------
return EXIT_SUCCESS ;
}
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