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/*@@
@header Symmetry.h
@date Sun 7th Mar 1999
@author Gerd Lanfermann
@desc
The extensions to the GH structure for 3D grid symmetry Treatment
We'll have six int array for every GF, which holds a flag for which symmetry or
(physical) bnd-condition to apply at the grid faces.
* These tables are set by SetSymmetry(GF,int,int,int)
during initialization.
* Default values ?
* The information is used during evolution by Einstein_DoBound(GF),
Einstein_DoSym(GF)
@enddesc
@history
@endhistory
@version $Header$
@@*/
#ifndef _SYMMETRY_H_
#define _SYMMETRY_H_
#define GFSYM_UNSET -42
#define GFSYM_NOSYM -41
typedef struct Symmetry
{
/* Symmetry[0..GF-1][0..dim-1] */
/* in each direction [0,..dim-1], this will hold the symmetry
operation across that plane, iff the grid layout requires this.
this compares to the {sx,sy,sz} of Cactus3.2 */
int **GFSym;
} SymmetryGHex;
#ifdef __cplusplus
extern "C"
{
#endif
int SetCartSymVI(cGH *GH, int *sym, int vi);
int SetCartSymGI(cGH *GH, int *sym, int vi);
int SetCartSymVN(cGH *GH, int *sym, const char *vn);
int SetCartSymGN(cGH *GH, int *sym, const char *vn);
int CartSymVI(cGH *GH, int vi);
int CartSymGI(cGH *GH, int gi);
int CartSymVN(cGH *GH, const char *vn);
int CartSymGN(cGH *GH, const char *gn);
#ifdef __cplusplus
}
#endif
#endif /* _SYMMETRY_H_ */
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