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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_ARGUMENTS;
DECLARE_CCTK_PARAMETERS;
CCTK_REAL min_spacing;
int d;
/* Calculate the minimum grid spacing */
min_spacing = cctk_delta_space[0];
for (d=1; d<cctk_dim; ++d)
{
min_spacing = (min_spacing<cctk_delta_space[d]
? min_spacing : cctk_delta_space[d]);
}
/* Calculate the timestep */
cctkGH->cctk_delta_time = dtfac*min_spacing;
if (verbose)
{
CCTK_VInfo(CCTK_THORNSTRING,
"Using a simple Courant condition to set then timestep");
CCTK_VInfo(CCTK_THORNSTRING,
" ... using a dtfac of %g", (double)dtfac);
CCTK_VInfo(CCTK_THORNSTRING,
" ... using a minimum spacing of %g", (double)min_spacing);
}
CCTK_VInfo(CCTK_THORNSTRING,
"Timestep set to %g (courant_static)",
(double)(cctkGH->cctk_delta_time/cctkGH->cctk_timefac));
}
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