MPI_Cart_shift

Returns the shifted source and destination ranks, given a shift direction and amount

Synopsis

#include "mpi.h"
int MPI_Cart_shift ( comm, direction, displ, source, dest )
MPI_Comm  comm;
int       direction;
int       displ;
int      *source;
int      *dest;

Input Parameters

	comm	communicator with cartesian structure (handle)
	direction	coordinate dimension of shift (integer)
	disp	displacement (> 0: upwards shift, < 0: downwards shift) (integer)

Output Parameters

	rank_source	rank of source process (integer)
	rank_dest	rank of destination process (integer)

Notes

The direction argument is in the range [0,n-1] for an n- dimensionalCartesian mesh.