Domain_Graph.h

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#ifndef Domain_Graph_included
#define Domain_Graph_included
 
#include <metis.h>   // to have idx_t, the entity index of METIS (32 or 64b depending on how METIS/PETSc was compiled)
 
#ifndef MPI_
 
#ifdef idx_t
#error Type idx_t is alreay defined without MPI, and hence without PETSc - this Should not happen
#endif
 
#define idx_t trustIdType
#endif
 
/*! @brief Build the graph of the domain that the METIS/PARMETIS/PTSCOTCH libraries need.
 *
 */
class Domain_Graph
{
public:
 
  using ArrOfIdx_ = TRUSTArray<idx_t, idx_t>;
 
  template <typename _SIZE_>
  void construire_graph_from_segment(const Domaine_32_64<_SIZE_>& dom,
                                     bool use_weights );
 
  template <typename _SIZE_>
  void construire_graph_elem_elem(const Domaine_32_64<_SIZE_>& dom,
                                  bool use_weights,
                                  Static_Int_Lists_32_64<_SIZE_>& graph_elements_perio);
 
  //
  // All members are public to facilitate access from Partitionneur_* classes (rather than friend-ing everything):
  //
 
  idx_t nvtxs;                /* The number of vertices */
  idx_t nedges;               /* The total number of edges */
  idx_t weightflag;
  ArrOfIdx_ xadj;             /* CRS storage scheme */
  ArrOfIdx_ adjncy;
  ArrOfIdx_ vwgts;
  ArrOfIdx_ ewgts;
  ArrOfIdx_ vtxdist;          // for parmetis: distribution of the initial graph on the procs
  ArrOfIdx_ edgegsttab;       // for ptscotch: local numbering of vertices
};
 
#endif