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/*@@
@file Simple.c
@date September 4 1999
@author Gabrielle Allen
@desc
Standard specification of timestep
@enddesc
@@*/
#include <stdlib.h>
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Parameters.h"
static const char *rcsid = "$Header$";
CCTK_FILEVERSION(CactusBase_Time_Simple_c)
void Time_Simple(CCTK_ARGUMENTS);
void Time_Simple(CCTK_ARGUMENTS)
{
DECLARE_CCTK_PARAMETERS
DECLARE_CCTK_ARGUMENTS
CCTK_REAL min_spacing=0;
/* Calculate the minimum grid spacing */
if (cctk_dim>=1)
{
min_spacing = cctk_delta_space[0];
}
if (cctk_dim>=2)
{
min_spacing = (min_spacing<cctk_delta_space[1] ?
min_spacing : cctk_delta_space[1]);
}
if (cctk_dim>=3)
{
min_spacing = (min_spacing<cctk_delta_space[2] ?
min_spacing : cctk_delta_space[2]);
}
if (cctk_dim>=4)
{
CCTK_WARN(0,"Time Step not defined for greater than 4 dimensions");
}
/* Calculate the timestep */
cctkGH->cctk_delta_time = dtfac*min_spacing;
if (verbose)
{
CCTK_VInfo(CCTK_THORNSTRING,
"Using simple courant condition to set timestep");
CCTK_VInfo(CCTK_THORNSTRING,
" ... using dtfac of %f",dtfac);
CCTK_VInfo(CCTK_THORNSTRING,
" ... using minimum spacing of %f",min_spacing);
}
CCTK_VInfo(CCTK_THORNSTRING,
"Timestep set to %f (Simple Courant)",cctkGH->cctk_delta_time);
}
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