Partitionneur_Metis.h

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#ifndef Partitionneur_Metis_included
#define Partitionneur_Metis_included
 
#include <Partitionneur_base.h>
#include <TRUST_Ref.h>
 
#include <Domaine_forward.h>
 
 
/*! @brief Partition d'un domaine en nb_parties parties equilibrees en utilisant la librairie METIS.
 *
 * Voir construire_partition
 *
 */
template <typename _SIZE_>
class Partitionneur_Metis_32_64 : public Partitionneur_base_32_64<_SIZE_>
{
  Declare_instanciable_with_param_32_64(Partitionneur_Metis_32_64);
 
public:
  using int_t = _SIZE_;
  using ArrOfInt_t = ArrOfInt_T<_SIZE_>;
  using IntVect_t = IntVect_T<_SIZE_>;
  using IntTab_t = IntTab_T<_SIZE_>;
  using Domaine_t = Domaine_32_64<_SIZE_>;
 
  using BigIntVect_ = TRUSTVect<int, _SIZE_>;
 
  int lire_motcle_non_standard(const Motcle&, Entree&) override;
  void associer_domaine(const Domaine_t& domaine) override { ref_domaine_ = domaine; }
  void construire_partition(BigIntVect_& elem_part, int& nb_parts_tot) const override;
 
 
private:
 
  // Parametres du partitionneur
  OBS_PTR(Domaine_t) ref_domaine_;
  int nb_parties_ = -1;
 
  // Options de metis
  enum AlgoMetis { PMETIS, KMETIS };
  AlgoMetis algo_ = PMETIS;
  int nb_essais_ = -1;
 
  // Drapeau: utiliser ou pas la ponderation des edges dans metis.
  //  C'est mieux de l'utiliser s'il y a des bords periodiques, le
  //  graphe est mieux equilibre. En revanche, metis utilisera plus
  //  de memoire (peut poser probleme sur les gros maillages).
  //  Cette option n'est pas indispensable: le maillage genere est
  //  valide dans avec ou sans l'option car on verifie de toutes facons
  //  la partition generee par metis (voir (***))
  bool use_weights_ = false;
  bool use_segment_to_build_connectivite_elem_elem_ = false;
 
};
#ifndef NO_METIS
typedef struct
{
  const char * name;
  int option;
} Metis_String_Option;
 
#endif
#endif