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/*@@
@file ConfPhys.c
@date September 3rd 1999
@author Gabrielle Allen
@desc
Conversions between physical and conformal metrics.
Be very careful using these functions, note that
conformal_state is not changed, this is up to the
calling routine
@enddesc
@version $Header$
@@*/
#include "cctk.h"
static const char *rcsid = "$Header$";
CCTK_FILEVERSION(CactusEinstein_StaticConformal_ConfPhys_c)
/********************************************************************
********************* Local Data Types ***********************
********************************************************************/
/********************************************************************
********************* Local Routine Prototypes *********************
********************************************************************/
/********************************************************************
***************** Scheduled Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Other Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Local Data *****************************
********************************************************************/
/********************************************************************
********************* External Routines **********************
********************************************************************/
/*@@
@routine StaticConf_ConfToPhysInPlace
@date September 3rd 1999
@author Gabrielle Allen
@desc
Convert the conformal metric to the physical in place.
@enddesc
@calls
@calledby
@history
@endhistory
@var nx
@vdesc number of points in the x direction
@vtype int
@vio in
@var ny
@vdesc number of points in the y direction
@vtype int
@vio in
@var nz
@vdesc number of points in the z direction
@vtype int
@vio in
@var psi
@vdesc conformal factor
@vtype const CCTK_REAL *
@vio in
@var gxx
@vdesc xx componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gxy
@vdesc xy componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gxz
@vdesc xz componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gyy
@vdesc yy componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gyz
@vdesc yz componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gzz
@vdesc zz componenent of metric
@vtype CCTK_REAL *
@vio inout
@@*/
void StaticConf_ConfToPhysInPlace (CCTK_INT const nx,
CCTK_INT const ny,
CCTK_INT const nz,
const CCTK_REAL * restrict const psi,
CCTK_REAL * restrict const gxx,
CCTK_REAL * restrict const gxy,
CCTK_REAL * restrict const gxz,
CCTK_REAL * restrict const gyy,
CCTK_REAL * restrict const gyz,
CCTK_REAL * restrict const gzz)
{
CCTK_REAL psi4;
int index;
CCTK_WARN (4, "Converting metric: conformal -> physical");
index = nx * ny * nz;
while (--index >= 0)
{
/* this should be faster than psi4 = pow (psi[index], 4) */
psi4 = psi[index] * psi[index];
psi4 = psi4 * psi4;
gxx[index] *= psi4;
gxy[index] *= psi4;
gxz[index] *= psi4;
gyy[index] *= psi4;
gyz[index] *= psi4;
gzz[index] *= psi4;
}
}
/*@@
@routine StaticConf_PhysToConfInPlace
@date September 3rd 1999
@author Gabrielle Allen
@desc
Convert the physical metric to the conformal in place.
@enddesc
@calls
@calledby
@history
@endhistory
@var nx
@vdesc number of points in the x direction
@vtype int
@vio in
@var ny
@vdesc number of points in the y direction
@vtype int
@vio in
@var nz
@vdesc number of points in the z direction
@vtype int
@vio in
@var psi
@vdesc conformal factor
@vtype const CCTK_REAL *
@vio in
@var gxx
@vdesc xx componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gxy
@vdesc xy componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gxz
@vdesc xz componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gyy
@vdesc yy componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gyz
@vdesc yz componenent of metric
@vtype CCTK_REAL *
@vio inout
@var gzz
@vdesc zz componenent of metric
@vtype CCTK_REAL *
@vio inout
@@*/
void StaticConf_PhysToConfInPlace (CCTK_INT const nx,
CCTK_INT const ny,
CCTK_INT const nz,
const CCTK_REAL * restrict const psi,
CCTK_REAL * restrict const gxx,
CCTK_REAL * restrict const gxy,
CCTK_REAL * restrict const gxz,
CCTK_REAL * restrict const gyy,
CCTK_REAL * restrict const gyz,
CCTK_REAL * restrict const gzz)
{
int index;
CCTK_REAL psi4;
CCTK_WARN (4, "Converting metric: physical -> conformal");
index = nx * ny * nz;
while (--index >= 0)
{
/* this should be faster than psi4 = pow (psi[index], 4) */
psi4 = psi[index] * psi[index];
psi4 = psi4 * psi4;
/* get the reciprocal for turning divisions into multiplications */
psi4 = 1.0 / psi4;
gxx[index] *= psi4;
gxy[index] *= psi4;
gxz[index] *= psi4;
gyy[index] *= psi4;
gyz[index] *= psi4;
gzz[index] *= psi4;
}
}
/********************************************************************
********************* Local Routines *************************
********************************************************************/
|
