ope_point.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 "ope_eq.hpp"
#include "scalar.hpp"
#include "tensor_impl.hpp"
#include "system_of_eqs.hpp"
namespace Kadath {
Ope_point::Ope_point (const System_of_eqs* zesys, const Point &MM, Ope_eq* target) : 
        Ope_eq(zesys, target->get_dom(), 1),  num(MM){
 
    parts[0] = target ;
    num = zesys->get_space().get_domain(dom)->absol_to_num(MM) ;    
}
 
Ope_point::~Ope_point() {
}
 
Term_eq Ope_point::action() const {
    Term_eq target (parts[0]->action()) ;
    
    // Check it is a tensor
    if (target.type_data != TERM_T) {
        cerr << "Ope_point only defined with respect for a tensor" << endl ;
        abort() ;
    }
 
    if (target.val_t->get_n_comp() != 1) {
        cerr << "Ope_point only defined with respect to a scalar (yet)" << endl ;
        abort() ;
    }
 
    
    // The value
    Array<int> ind (target.val_t->indices(0)) ;
    Val_domain val ((*target.val_t)(ind)(dom)) ;
    
    double resval ;
    if (val.check_if_zero()) 
        resval= 0. ;
    else  {
        val.coef() ;
        resval = val.get_base().summation(num, val.get_coef()) ;
    }
    if (target.der_t!=0x0) {
        Array<int> indder (target.der_t->indices(0)) ;
        Val_domain valder ((*target.der_t)(ind)(dom)) ;
        
        double resder ;
        if (valder.check_if_zero()) 
            resder= 0. ;
        else {
            valder.coef() ;
            resder = valder.get_base().summation(num, valder.get_coef()) ;
        }
        Term_eq res (dom, resval, resder) ;
        return res ;
    }
    else {
        Term_eq res (dom, resval) ;
        return res ;
    }
}}