domain_compact_systems.cpp

/*
    Copyright 2017 Philippe Grandclement
 
    This file is part of Kadath.
 
    Kadath 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 3 of the License, or
    (at your option) any later version.
 
    Kadath 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 Kadath.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "headcpp.hpp"
 
#include "spheric.hpp"
#include "point.hpp"
#include "val_domain.hpp"
namespace Kadath {
void Domain_compact::find_other_dom (int dom, int bound, int& other_dom, int& other_bound) const {
 
    switch (bound) {
        case INNER_BC:
            other_dom = dom -1 ;
            other_bound = OUTER_BC ;
            break ;
        default:
            cerr << "Unknown boundary case in Domain_compact::find_other_dom" << endl ;
            abort() ;
        }
}
 
double Domain_compact::val_boundary (int bound, const Val_domain& so, const Index& pos_cf) const {
 
    if (so.check_if_zero())
        return 0. ;
    else {
    so.coef() ;
    double res = 0 ;
    Index copie_pos (pos_cf) ;
    switch (bound) {
        case INNER_BC :
            for (int i=0 ; i<nbr_coefs(0) ; i++) {
                copie_pos.set(0) = i ;
                if (i%2==0)
                    res += so.get_coef(copie_pos) ;
                else
                    res -= so.get_coef(copie_pos) ;
            }
            break ;
        case OUTER_BC :
            for (int i=0 ; i<nbr_coefs(0) ; i++) {
                copie_pos.set(0) = i ;
                res += so.get_coef(copie_pos) ;
                }
            break ;
        default :
            cerr << "Unknown boundary type in Domain_compact::val_boundary" << endl ;
            abort() ;
    }
    return res ;
    }
}
 
int Domain_compact::nbr_points_boundary (int bound, const Base_spectral& bb) const {
 
    if ((bound!=INNER_BC) && (bound!=OUTER_BC)) {
      cerr << "Unknown boundary in Domain_compac::nbr_points_boundary" << endl ;
      abort() ;
    }
    //Look at the symetrie :
    int first_base_theta = (*bb.bases_1d[1]) (0) ;
    int nbrj = ((first_base_theta==COS_EVEN) || (first_base_theta==SIN_ODD)) ? nbr_points(1)-1 : nbr_points(1)-2 ;
 
    return (nbrj*nbr_points(2)+1) ;
}
 
void Domain_compact::do_which_points_boundary (int bound, const Base_spectral& bb, Index** which_coef, int start) const {
 
    int pos_which = start ;
    Index pos (nbr_points) ;
    switch (bound) {
        case INNER_BC :
            pos.set(0) = 0 ;
            break ;
        case OUTER_BC :
            pos.set(0) = nbr_points(0)-1 ;
            break ;
        default :
            cerr << "Unknown boundary in Domain_compact::do_which_points_inside" << endl ;
            abort() ;
    }
    //Look at the symetrie :
    int first_base_theta = (*bb.bases_1d[1]) (0) ;
    int maxj = ((first_base_theta==COS_EVEN) || (first_base_theta==SIN_ODD)) ? nbr_points(1) : nbr_points(1)-1 ;
 
    for (int k=0 ; k<nbr_points(2) ; k++) {
        pos.set(2) = k ;
        for (int j=0 ; j<maxj ; j++) {
            pos.set(1) = j ;
            if ((k==0) || (j!=0)) {
                which_coef[pos_which] = new Index(pos) ;
                pos_which ++ ;
            }
        }
    }
}
 
}