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/// \file
/// Parallel domain decomposition.
#ifndef _GEOMETRY_H_
#define _GEOMETRY_H_
#include "mytype.h"
/// Domain decomposition information.
typedef struct DomainSt
{
// process-layout data
int procGrid[3]; //!< number of processors in each dimension
int procCoord[3]; //!< i,j,k for this processor
// global bounds data
real3 globalMin; //!< minimum global coordinate (angstroms)
real3 globalMax; //!< maximum global coordinate (angstroms)
real3 globalExtent; //!< global size: globalMax - globalMin
// local bounds data
real3 localMin; //!< minimum coordinate on local processor
real3 localMax; //!< maximum coordinate on local processor
real3 localExtent; //!< localMax - localMin
} Domain;
struct DomainSt* initDecomposition(int xproc, int yproc, int zproc,
real3 globalExtent);
/// Find the MPI rank of a neighbor domain from a relative coordinate.
int processorNum(Domain* domain, int dix, int diy, int dik);
#endif
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