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/*@@
@file ICN.c
@date Sun May 26 04:29:07 2002
@author Ian Hawke
@desc
This implements the more efficient Iterative Crank Nicholson integrator.
This follows the implementation of ICN in all AEI codes and is
equivalent to (but hopefully more efficient than) the generic ICN
integrator also implemented by MoL.
@enddesc
@version $Header$
@@*/
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Parameters.h"
#include "ExternalVariables.h"
static const char *rcsid = "$Header$";
CCTK_FILEVERSION(CactusBase_MoL_ICN_c);
/********************************************************************
********************* Local Data Types ***********************
********************************************************************/
/********************************************************************
********************* Local Routine Prototypes *********************
********************************************************************/
/********************************************************************
***************** Scheduled Routine Prototypes *********************
********************************************************************/
void MoL_ICNAdd(CCTK_ARGUMENTS);
void MoL_ICNAverage(CCTK_ARGUMENTS);
/********************************************************************
********************* Other Routine Prototypes *********************
********************************************************************/
/********************************************************************
********************* Local Data *****************************
********************************************************************/
/********************************************************************
********************* External Routines **********************
********************************************************************/
/*@@
@routine MoL_ICNAdd
@date Sun May 26 04:17:23 2002
@author Ian Hawke
@desc
Performs Iterative Crank Nicholson time integration. The number of
steps is arbitrary.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
void MoL_ICNAdd(CCTK_ARGUMENTS)
{
DECLARE_CCTK_ARGUMENTS;
DECLARE_CCTK_PARAMETERS;
cGroupDynamicData arraydata;
CCTK_INT groupindex, ierr;
CCTK_INT arraytotalsize, arraydim;
CCTK_INT index, var;
CCTK_INT totalsize;
CCTK_REAL *OldVar;
CCTK_REAL *UpdateVar;
CCTK_REAL *RHSVar;
/* FIXME */
#ifdef MOLDOESCOMPLEX
CCTK_COMPLEX *OldComplexVar;
CCTK_COMPLEX *UpdateComplexVar;
CCTK_COMPLEX *RHSComplexVar;
CCTK_COMPLEX Complex_Delta_Time = CCTK_Cmplx(CCTK_DELTA_TIME, 0);
#endif
#ifdef MOLDEBUG
printf("Inside ICN.\nProcessor %d.\nStep %d.\nRefinement %d.\n"
"Timestep %g.\nSpacestep %g.\nTime %g\n",
CCTK_MyProc(cctkGH),
MoL_Intermediate_Steps - *MoL_Intermediate_Step + 1,
*cctk_levfac,
CCTK_DELTA_TIME,
CCTK_DELTA_SPACE(0),
cctk_time);
#endif
totalsize = 1;
for (arraydim = 0; arraydim < cctk_dim; arraydim++)
{
totalsize *= cctk_lsh[arraydim];
}
#ifdef MOLDEBUG
printf("MoL: the ICN routine says dt = %f.\n", CCTK_DELTA_TIME);
#endif
for (var = 0; var < MoLNumEvolvedVariables; var++)
{
OldVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 1,
EvolvedVariableIndex[var]);
UpdateVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
EvolvedVariableIndex[var]);
RHSVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
RHSVariableIndex[var]);
for (index = 0; index < totalsize; index++)
{
UpdateVar[index] = OldVar[index] + CCTK_DELTA_TIME * RHSVar[index];
}
}
for (var = 0; var < MoLNumEvolvedArrayVariables; var++)
{
OldVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 1,
EvolvedArrayVariableIndex[var]);
UpdateVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
EvolvedArrayVariableIndex[var]);
RHSVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
RHSArrayVariableIndex[var]);
groupindex = CCTK_GroupIndexFromVarI(EvolvedArrayVariableIndex[var]);
ierr = CCTK_GroupDynamicData(cctkGH, groupindex,
&arraydata);
if (ierr)
{
CCTK_VWarn(0, __LINE__, __FILE__, CCTK_THORNSTRING,
"The driver does not return group information "
"for group '%s'.",
CCTK_GroupName(groupindex));
}
arraytotalsize = 1;
for (arraydim = 0; arraydim < arraydata.dim; arraydim++)
{
arraytotalsize *= arraydata.lsh[arraydim];
}
/* CCTK_VWarn(1, __LINE__, __FILE__, CCTK_THORNSTRING, */
/* "This proc array total size is %d.", */
/* arraytotalsize); */
for (index = 0; index < arraytotalsize; index++)
{
UpdateVar[index] = OldVar[index] + CCTK_DELTA_TIME * RHSVar[index];
}
}
/* FIXME */
#ifdef MOLDOESCOMPLEX
for (var = 0; var < MoLNumEvolvedComplexVariables; var++)
{
OldComplexVar = (CCTK_COMPLEX*)CCTK_VarDataPtrI(cctkGH, 1,
EvolvedComplexVariableIndex[var]);
UpdateComplexVar = (CCTK_COMPLEX*)CCTK_VarDataPtrI(cctkGH, 0,
EvolvedComplexVariableIndex[var]);
RHSComplexVar = (CCTK_COMPLEX*)CCTK_VarDataPtrI(cctkGH, 0,
RHSComplexVariableIndex[var]);
for (index = 0; index < totalsize; index++)
{
UpdateComplexVar[index] = CCTK_CmplxAdd(OldComplexVar[index],
CCTK_CmplxMul(Complex_Delta_Time,
RHSComplexVar[index]));
}
}
#endif
return;
}
/*@@
@routine MoL_ICNAverage
@date Fri Jul 18 14:02:00 2003
@author Ian Hawke, Erik Schnetter
@desc
Averages between the current and the previous time level.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
void MoL_ICNAverage(CCTK_ARGUMENTS)
{
DECLARE_CCTK_ARGUMENTS;
DECLARE_CCTK_PARAMETERS;
cGroupDynamicData arraydata;
CCTK_INT groupindex, ierr;
CCTK_INT arraytotalsize, arraydim;
CCTK_INT index, var;
CCTK_INT totalsize;
CCTK_REAL *OldVar;
CCTK_REAL *UpdateVar;
CCTK_REAL *RHSVar;
/* FIXME */
#ifdef MOLDOESCOMPLEX
CCTK_COMPLEX *OldComplexVar;
CCTK_COMPLEX *UpdateComplexVar;
CCTK_COMPLEX *RHSComplexVar;
CCTK_COMPLEX Complex_Half = CCTK_Cmplx(0.5, 0);
#endif
#ifdef MOLDEBUG
printf("Inside ICN.\nProcessor %d.\nStep %d.\nRefinement %d.\n"
"Timestep %g.\nSpacestep %g.\nTime %g\n",
CCTK_MyProc(cctkGH),
MoL_Intermediate_Steps - *MoL_Intermediate_Step + 1,
*cctk_levfac,
CCTK_DELTA_TIME,
CCTK_DELTA_SPACE(0),
cctk_time);
#endif
totalsize = 1;
for (arraydim = 0; arraydim < cctk_dim; arraydim++)
{
totalsize *= cctk_lsh[arraydim];
}
#ifdef MOLDEBUG
printf("MoL: the ICN routine says dt = %f.\n", CCTK_DELTA_TIME);
#endif
for (var = 0; var < MoLNumEvolvedVariables; var++)
{
OldVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 1,
EvolvedVariableIndex[var]);
UpdateVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
EvolvedVariableIndex[var]);
RHSVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
RHSVariableIndex[var]);
for (index = 0; index < totalsize; index++)
{
UpdateVar[index] = 0.5 * (UpdateVar[index] + OldVar[index]);
}
}
for (var = 0; var < MoLNumEvolvedArrayVariables; var++)
{
OldVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 1,
EvolvedArrayVariableIndex[var]);
UpdateVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
EvolvedArrayVariableIndex[var]);
RHSVar = (CCTK_REAL*)CCTK_VarDataPtrI(cctkGH, 0,
RHSArrayVariableIndex[var]);
groupindex = CCTK_GroupIndexFromVarI(EvolvedArrayVariableIndex[var]);
ierr = CCTK_GroupDynamicData(cctkGH, groupindex,
&arraydata);
if (ierr)
{
CCTK_VWarn(0, __LINE__, __FILE__, CCTK_THORNSTRING,
"The driver does not return group information "
"for group '%s'.",
CCTK_GroupName(groupindex));
}
arraytotalsize = 1;
for (arraydim = 0; arraydim < arraydata.dim; arraydim++)
{
arraytotalsize *= arraydata.lsh[arraydim];
}
for (index = 0; index < arraytotalsize; index++)
{
UpdateVar[index] = 0.5 * (UpdateVar[index] + OldVar[index]);
}
}
/* FIXME */
#ifdef MOLDOESCOMPLEX
for (var = 0; var < MoLNumEvolvedComplexVariables; var++)
{
OldComplexVar = (CCTK_COMPLEX*)CCTK_VarDataPtrI(cctkGH, 1,
EvolvedComplexVariableIndex[var]);
UpdateComplexVar = (CCTK_COMPLEX*)CCTK_VarDataPtrI(cctkGH, 0,
EvolvedComplexVariableIndex[var]);
RHSComplexVar = (CCTK_COMPLEX*)CCTK_VarDataPtrI(cctkGH, 0,
RHSComplexVariableIndex[var]);
for (index = 0; index < totalsize; index++)
{
UpdateComplexVar[index] = CCTK_CmplxMul(Complex_Half, CCTK_CmplxAdd(UpdateComplexVar[index], OldComplexVar[index]));
}
}
#endif
return;
}
/********************************************************************
********************* Local Routines *************************
********************************************************************/
|
