Integrer_champ_med.cpp

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#include <Integrer_champ_med.h>
#include <Param.h>
#include <Champ_Fonc_MED.h>
#include <SFichier.h>
 
Implemente_instanciable(Integrer_champ_med,"Integrer_champ_med",Interprete);
// XD integrer_champ_med interprete integrer_champ_med BRACE his keyword is used to calculate a flow rate from a
// XD_CONT velocity MED field read before. The method is either debit_total to calculate the flow rate on the whole
// XD_CONT surface, either integrale_en_z to calculate flow rates between z=zmin and z=zmax on nb_tranche surfaces. The
// XD_CONT output file indicates first the flow rate for the whole surface and then lists for each tranche : the height
// XD_CONT z, the surface average value, the surface area and the flow rate. For the debit_total method, only one
// XD_CONT tranche is considered.NL2 file :z Sum(u.dS)/Sum(dS) Sum(dS) Sum(u.dS)
 
/*! @brief Simple appel a: Interprete::printOn(Sortie&)
 *
 * @param (Sortie& os) un flot de sortie
 * @return (Sortie&) le flot de sortie modifie
 */
Sortie& Integrer_champ_med::printOn(Sortie& os) const
{
  return Interprete::printOn(os);
}
 
/*! @brief Simple appel a: Interprete::readOn(Entree&)
 *
 * @param (Entree& is) un flot d'entree
 * @return (Entree&) le flot d'entree modifie
 */
Entree& Integrer_champ_med::readOn(Entree& is)
{
  return Interprete::readOn(is);
}
 
void calcul_normal_norme(const ArrOfDouble& org,const ArrOfDouble& point1, const ArrOfDouble& point2,ArrOfDouble& normal);
double calcul_surface_triangle(const ArrOfDouble& origine,const ArrOfDouble& point1, const ArrOfDouble& point2)
{
  double normal0=(point1[1]-origine[1])*(point2[2]-origine[2])-((point2[1]-origine[1])*(point1[2]-origine[2]));
 
  double normal1=(point1[2]-origine[2])*(point2[0]-origine[0])-((point2[2]-origine[2])*(point1[0]-origine[0]));
  double normal2=(point1[0]-origine[0])*(point2[1]-origine[1])-((point2[0]-origine[0])*(point1[1]-origine[1]));
  double res=normal0*normal0+ normal1*normal1 + normal2*normal2 ;
 
  return sqrt(res)/2.;
}
 
double  portion_surface_elem(const ArrOfDouble& pointA,const ArrOfDouble& pointB, const ArrOfDouble& pointC,const double z)
{
  if (z<=pointA[2]) return 0;
  if (z>pointC[2]) return calcul_surface_triangle(pointA,pointB,pointC);
  ArrOfDouble pointD(3);
  // le point D est sur AC a hauteur de B.
  pointD[2]=pointB[2];
  double lambda=(pointB[2]-pointA[2])/(pointC[2]-pointA[2]);
  for (int i=0; i<2; i++)
    pointD[i]=pointA[i]+lambda*(pointC[i]-pointA[i]);
  if (z<=pointB[2])
    {
      // on calcul la surface du triangle inferieur
      // et on prend la proportion...
      double surf_inf=calcul_surface_triangle(pointA,pointB,pointD);
      double rap=1;
      if (pointB[2]!=pointA[2])
        rap=(z-pointA[2])/(pointB[2]-pointA[2]);
      return surf_inf*rap*rap;
    }
  else
    {
      // on calcul la surface du triangle inferieur
      // et on prend la proportion...
      // et on retire a la surface totale
      double surf_sup=calcul_surface_triangle(pointB,pointD,pointC);
      double rap=(z-pointC[2])/(pointB[2]-pointC[2]);
      double surf_tot=calcul_surface_triangle(pointA,pointB,pointC);
      return surf_tot-surf_sup*rap*rap;
    }
 
}
 
double portion_surface(const ArrOfDouble& point0,const ArrOfDouble& point1, const ArrOfDouble& point2,const double zmin,const double zmax)
{
  return portion_surface_elem(point0,point1,point2,zmax)- portion_surface_elem(point0,point1,point2,zmin);
}
 
/*! @brief Fonction principale de l'interprete.
 *
 * @param (Entree& is) un flot d'entree
 * @return (Entree&) le flot d'entree
 */
Entree& Integrer_champ_med::interpreter(Entree& is)
{
  Motcle nom_methode;
  Nom nom_fichier("integrale");
  Nom nom_champ_fonc_med;
 
  double zmin=0,zmax=0;
  int nb_tranche=1;
  Param param(que_suis_je());
 
  param.ajouter("champ_med",&nom_champ_fonc_med,Param::REQUIRED);    // XD attr champ_med ref_champ_fonc_med champ_med REQ not_set
  param.ajouter("methode",&nom_methode,Param::REQUIRED); // XD attr methode chaine(into=["integrale_en_z","debit_total"]) methode REQ to choose between the integral following z or over the entire height (debit_total corresponds to zmin=-DMAXFLOAT, ZMax=DMAXFLOAT, nb_tranche=1)
  param.ajouter("zmin",&zmin);                   // XD attr zmin floattant zmin OPT not_set
  param.ajouter("zmax",&zmax);                   // XD attr zmax floattant zmax OPT not_set
  param.ajouter("nb_tranche",&nb_tranche);       // XD attr nb_tranche entier nb_tranche OPT not_set
  param.ajouter("fichier_sortie",&nom_fichier);  // XD attr fichier_sortie chaine fichier_sortie OPT name of the output
  // XD_CONT file, by default: integrale.
  param.lire_avec_accolades_depuis(is);
  if ((nom_methode!="integrale_en_z")&&(nom_methode!="debit_total"))
    {
      Cerr<<"method "<<nom_methode <<" not coded yet "<<finl;
    }
  // on recupere le domaine
  if(! sub_type(Champ_Fonc_MED, objet(nom_champ_fonc_med)))
    {
      Cerr << nom_champ_fonc_med << " type is " << objet(nom_champ_fonc_med).que_suis_je() << finl;
      Cerr << "only the objects of type Champ_Fonc_MED can be meshed" << finl;
      exit();
    }
  Champ_Fonc_MED& champ=ref_cast(Champ_Fonc_MED, objet(nom_champ_fonc_med));
  const Domaine& domaine=champ.domaine_dis_base().domaine();
  const DoubleTab& coord=domaine.les_sommets();
  // on fait une coie pour les modifier
  IntTab les_elems_mod=domaine.les_elems();
  const IntTab&  les_elems=domaine.les_elems();
 
  ArrOfDouble normal(3);
 
 
  const DoubleTab& valeurs= champ.valeurs();
  assert(valeurs.dimension(0)==domaine.nb_elem());
  assert(valeurs.dimension(1)==3);
  double dz=(zmax-zmin)/nb_tranche;
  ArrOfDouble res(nb_tranche),pos(nb_tranche),surface(nb_tranche);
  int nb_elem=les_elems.dimension(0);
  Cerr<<" Field integration using the method "<<nom_methode<<" on the domain "<<domaine.le_nom() <<finl;
  if (nom_methode=="debit_total")
    {
      nb_tranche=1;
      zmax=DMAXFLOAT/2.;
      zmin=-zmax;
      dz=(zmax-zmin);
      pos[0]=0;
 
    }
  //if (nom_methode=="integrale_en_z")
  {
    // Etape 1 on reordonne les triangles pour classeren z les sommets
 
    for (int elem=0; elem<nb_elem; elem++)
      {
        ArrOfInt zz(3);
        for (int i=0; i<3; i++)
          zz[i] = les_elems(elem,i);
        std::sort(zz.begin(), zz.end(), [&](int a, int b)
        {
          return (coord(a,2)<coord(b,2));
        });
        for (int i=0; i<3; i++)
          {
            int ss=zz[i];
            les_elems_mod(elem,i)=ss;
          }
      }
 
    ArrOfDouble point0(3),point1(3),point2(3);
    for (int elem=0; elem<nb_elem; elem++)
      {
 
        for (int i=0; i<3; i++)
          {
            point0[i]=coord(les_elems(elem,0),i);
            point1[i]=coord(les_elems(elem,1),i);
            point2[i]=coord(les_elems(elem,2),i);
          }
        calcul_normal_norme(point0,point1,  point2, normal);
        for (int i=0; i<3; i++)
          {
            point0[i]=coord(les_elems_mod(elem,0),i);
            point1[i]=coord(les_elems_mod(elem,1),i);
            point2[i]=coord(les_elems_mod(elem,2),i);
          }
        for (int tranche=0; tranche<nb_tranche; tranche++)
          {
 
            double zminl=(zmin)+(zmax-zmin)/nb_tranche*tranche;
            double zmaxl=zminl+dz;
            pos[tranche]=(zminl+zmaxl)/2.;
            double z0=coord(les_elems_mod(elem,0),2);
            if (z0<=zmaxl)
              {
 
                double z2=coord(les_elems_mod(elem,2),2);
                if (z2>=zminl)
                  {
 
 
                    double portion=portion_surface(point0,point1,point2,zminl,zmaxl);
                    double prod_scal=0;
 
                    for (int i=0; i<3; i++)
                      prod_scal+=valeurs(elem,i)*normal[i];
                    res[tranche]+=portion*prod_scal;
                    surface[tranche]+=portion;
                  }
              }
 
          }
      }
  }
 
  double trace=0;
  SFichier so(nom_fichier);
  for (int nb=0; nb<nb_tranche; nb++)
    {
      trace+=res[nb];
      if (surface[nb]!=0)
        res[nb]/=surface[nb];
      else assert(res[nb]==0);
    }
  Cout<<"# overall balance "<<trace<<finl;
  so<<"# bilan global "<<trace<<finl;
  so<<"# position, valeur moyenne, surface, flux"<<finl;
  for (int nb=0; nb<nb_tranche; nb++)
    so << pos[nb]<<" "<<res[nb]<<" "<<surface[nb]<<" "<<res[nb]*surface[nb]<<finl;
 
  return is;
 
}