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/*
* Copyright (c) 1999-2001 Philippe Grandclement
*
* 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
*
*/
char multx2_1d_C[] = "$Header: /cvsroot/Lorene/C++/Source/Non_class_members/Operators/multx2_1d.C,v 1.5 2015/03/05 08:49:32 j_novak Exp $" ;
/*
* $Id: multx2_1d.C,v 1.5 2015/03/05 08:49:32 j_novak Exp $
* $Log: multx2_1d.C,v $
* Revision 1.5 2015/03/05 08:49:32 j_novak
* Implemented operators with Legendre bases.
*
* Revision 1.4 2014/10/13 08:53:24 j_novak
* Lorene classes and functions now belong to the namespace Lorene.
*
* Revision 1.3 2014/10/06 15:16:06 j_novak
* Modified #include directives to use c++ syntax.
*
* Revision 1.2 2002/10/16 14:36:58 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 15:19:29 e_gourgoulhon
* LORENE
*
* Revision 2.0 1999/10/11 09:53:08 phil
* *** empty log message ***
*
*
* $Header: /cvsroot/Lorene/C++/Source/Non_class_members/Operators/multx2_1d.C,v 1.5 2015/03/05 08:49:32 j_novak Exp $
*
*/
// Includes
#include <cstdlib>
#include <cassert>
#include "headcpp.h"
#include "type_parite.h"
#include "proto.h"
//-----------------------------------
// Routine pour les cas non prevus --
//-----------------------------------
namespace Lorene {
void _multx2_1d_pas_prevu(int nr, double* tb, double *res) {
cout << "multx2 pas prevu..." << tb << " " << res << endl ;
cout << "nr : " << nr << endl ;
abort() ;
exit(-1) ;
}
//---------------
// cas R_CHEBP --
//---------------
void _multx2_1d_r_chebp(int nr, double* tb, double *xo) {
assert (nr>2) ;
xo[0] = (2*tb[0]+tb[1])/4 ;
xo[1] = (2*tb[0]+2*tb[1]+tb[2])/4 ;
for (int i=2 ; i<nr-1 ; i++)
xo[i] = (tb[i-1]+2*tb[i]+tb[i+1])/4 ;
xo[nr-1] = (tb[nr-2]+2*tb[nr-1])/4 ;
}
//---------------
// cas R_CHEBI --
//---------------
void _multx2_1d_r_chebi(int nr, double* tb, double *xo){
assert(nr>2) ;
xo[0] = (3*tb[0]+tb[1])/4 ;
for (int i=1 ; i<nr-1 ; i++)
xo[i] = (tb[i-1]+2*tb[i]+tb[i+1])/4 ;
xo[nr-1] = 0. ;//(tb[nr-2]+2*tb[nr-1])/4 ;
}
//---------------
// cas R_CHEB --
//---------------
void _multx2_1d_r_cheb(int nr, double* tb, double *xo){
assert(nr>3) ;
xo[0] = (2*tb[0]+tb[2])/4 ;
xo[1] = (3*tb[1]+tb[3])/4 ;
xo[2] = (2*tb[0]+2*tb[2]+tb[4])/4 ;
for (int i=3 ; i<nr-2 ; i++)
xo[i] = (tb[i-2]+2*tb[i]+tb[i+2])/4 ;
for (int i=nr-2 ; i<nr ; i++)
xo[i] = (tb[i-2]+2*tb[i])/4 ;
}
//--------------
// cas R_LEGP --
//--------------
void _multx2_1d_r_legp(int nr, double* tb, double *xo) {
assert (nr>2) ;
xo[0] = tb[0]/3. + 2.*tb[1]/15. ;
for (int i=1 ; i<nr-1 ; i++)
xo[i] = double(2*i*(2*i-1))*tb[i-1]/double((4*i-1)*(4*i-3))
+ (double(4*i*i)/double((4*i-1)*(4*i+1))
+ double((2*i+1)*(2*i+1))/double((4*i+1)*(4*i+3)))*tb[i]
+ double((2*i+1)*(2*i+2))*tb[i+1]/double((4*i+3)*(4*i+5)) ;
xo[nr-1] = double((2*nr-2)*(2*nr-3))*tb[nr-2]/double((4*nr-5)*(4*nr-7))
+ (double(4*(nr-1)*(nr-1))/double((4*nr-5)*(4*nr-3))
+ double((2*nr-1)*(2*nr-1))/double((4*nr-3)*(4*nr-1)))*tb[nr-1] ;
}
//--------------
// cas R_LEGI --
//--------------
void _multx2_1d_r_legi(int nr, double* tb, double *xo){
assert(nr>2) ;
xo[0] = 0.6*tb[0] + 6.*tb[1]/35. ;
for (int i=1 ; i<nr-1 ; i++)
xo[i] = double(2*i*(2*i+1))*tb[i-1]/double((4*i+1)*(4*i-1))
+ (double((2*i+1)*(2*i+1))/double((4*i+1)*(4*i+3))
+ double((2*i+2)*(2*i+2))/double((4*i+3)*(4*i+5)) )*tb[i]
+ double((2*i+2)*(2*i+3))*tb[i+1]/double((4*i+7)*(4*i+5)) ;
xo[nr-1] = 0. ;
}
//-------------
// cas R_LEG --
//-------------
void _multx2_1d_r_leg(int nr, double* tb, double *xo){
assert(nr>3) ;
xo[0] = tb[0]/3. + 2.*tb[2]/15. ;
xo[1] = 0.6*tb[1] + 6.*tb[3]/35. ;
for (int i=2 ; i<nr-2 ; i++)
xo[i] = double(i*(i-1))*tb[i-2]/double((2*i-1)*(2*i-3))
+ (double(i*i)/double((2*i-1)*(2*i+1))
+ double((i+1)*(i+1))/double((2*i+1)*(2*i+3)))*tb[i]
+ double((i+1)*(i+2))*tb[i+2]/double((2*i+3)*(2*i+5)) ;
for (int i=nr-2 ; i<nr ; i++)
xo[i] = double(i*(i-1))*tb[i-2]/double((2*i-1)*(2*i-3))
+ (double(i*i)/double((2*i-1)*(2*i+1))
+ double((i+1)*(i+1))/double((2*i+1)*(2*i+3)))*tb[i] ;
}
//----------------------
// La routine a appeler
//----------------------
void multx2_1d(int nr, double **tb, int base_r) // Version appliquee a this
{
// Routines de derivation
static void (*multx2_1d[MAX_BASE])(int, double *, double*) ;
static int nap = 0 ;
// Premier appel
if (nap==0) {
nap = 1 ;
for (int i=0 ; i<MAX_BASE ; i++) {
multx2_1d[i] = _multx2_1d_pas_prevu ;
}
// Les routines existantes
multx2_1d[R_CHEB >> TRA_R] = _multx2_1d_r_cheb ;
multx2_1d[R_CHEBP >> TRA_R] = _multx2_1d_r_chebp ;
multx2_1d[R_CHEBI >> TRA_R] = _multx2_1d_r_chebi ;
multx2_1d[R_LEG >> TRA_R] = _multx2_1d_r_leg ;
multx2_1d[R_LEGP >> TRA_R] = _multx2_1d_r_legp ;
multx2_1d[R_LEGI >> TRA_R] = _multx2_1d_r_legi ;
}
double *result = new double[nr] ;
multx2_1d[base_r](nr, *tb, result) ;
delete [] (*tb) ;
(*tb) = result ;
}
}
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