Champ_Fonc_t.cpp

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#include <Champ_Fonc_t.h>
#include <algorithm>
 
Implemente_instanciable(Champ_Fonc_t,"Champ_Fonc_t",Champ_Uniforme_inst);
// XD champ_fonc_t champ_don_base champ_fonc_t NO_BRACE Field that is constant in space and is a function of time.
// XD attr val listchaine val REQ Values of field components (time dependant functions).
 
 
/*! @brief NE FAIT RIEN
 *
 * @param (Sortie& os) un flot de sortie
 * @return (Sortie&) le flot de sortie
 */
Sortie& Champ_Fonc_t::printOn(Sortie& os) const
{
  return os;
}
 
/*! @brief Lecture des parametres dans le fichier data.
 *
 * On attend
 *     nb_composantes expression_composante1(t) expression_composante2(t) ...
 *   Exemple:
 *     3 SIN(t) t*t 1.+t
 *
 */
Entree& Champ_Fonc_t::readOn(Entree& is)
{
  int nb_compo;
  nb_compo=lire_dimension(is,que_suis_je());
  if (nb_compo <= 0)
    {
      Cerr << "Error in Champ_Fonc_t::readOn : nb_compo <= 0" << finl;
      assert(0);
      exit();
    }
  dimensionner(1, nb_compo);
  ft.dimensionner(nb_compo);
  for (int i_parser = 0; i_parser < nb_compo; i_parser++)
    {
      Nom expression;
      is >> expression;
      const char* s = expression.getChar();
      std::string ss(s);
      std::transform(ss.begin(), ss.end(), ss.begin(), ::toupper);
      ft[i_parser].setNbVar(1);
      ft[i_parser].setString(ss);
      ft[i_parser].addVar("t");
      ft[i_parser].parseString();
    }
 
  me_calculer(0.);
 
  return is;
}
 
/*! @brief Calcul du tableau "valeurs()" au temps t a partir des fonctions analytiques lues dans le readOn
 *
 */
void Champ_Fonc_t::me_calculer(double t)
{
  int i = 0;
  DoubleTab& val = valeurs();
  for (i = 0; i < ft.size(); i++)
    {
      //Parser & p = parser_array_[i];
      //p.setVar(0, t);
      //const double v = p.eval();
      ft[i].setVar(0, t);
      const double v = ft[i].eval();
      val(0, i) = v;
    }
}