ope_val.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"
namespace Kadath {
Ope_val::Ope_val (const System_of_eqs* zesys, const Index &pp, Ope_eq* target) : 
        Ope_eq(zesys, target->get_dom(), 1),  pos (pp) {
    parts[0] = target ;
}
 
Ope_val::~Ope_val() {
}
 
Term_eq Ope_val::action() const {
    Term_eq target (parts[0]->action()) ;
    // Check it is a tensor
    if (target.type_data != TERM_T) {
        cerr << "Ope_int only defined with respect for a tensor" << endl ;
        abort() ;
    }
 
    if (target.val_t->get_n_comp() != 1) {
        cerr << "Ope_val 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)) ;
    val.coef_i() ;
    double resval ;
    if (val.check_if_zero()) 
        resval= 0. ;
    else 
        resval = val(pos) ;
 
    if (target.der_t!=0x0) {
        Val_domain val_der ((*target.der_t)(ind)(dom)) ;
        val_der.coef_i() ;
        double resder ;
        if (val_der.check_if_zero()) 
            resder = 0. ;
        else 
            resder = val_der(pos) ;
        Term_eq res (dom, resval, resder) ;
        return res ;
    }
    else {
        Term_eq res (dom, resval) ;
        return res ;
    }
}}