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/*@@
@file InitialData.cc
@date
@author Werner Benger
@desc
Initial data for the 3D Wave Equation
Derived from Tom Goodale
@enddesc
@@*/
#include "cctk.h"
#include "cctk_Flesh.h"
#include "cctk_parameters.h"
#include "cctk_Groups.h"
#include "cctk_arguments.h"
#include "cctk_Comm.h"
#include "CactusBase/CartGrid3D/src/Symmetry.h"
#include <math.h>
inline double sqr(double val)
{
return val*val;
}
/*@@
@routine IDScalarWave_InitialData
@date
@author Tom Goodale
@desc
Set up initial data for the wave equation
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
extern "C" void IDScalarWaveCXX_InitialData(CCTK_CARGUMENTS)
{
DECLARE_CCTK_CARGUMENTS
DECLARE_CCTK_PARAMETERS
for(int k=0; k<cctk_lsh[2]; k++)
for(int j=0; j<cctk_lsh[1]; j++)
for(int i=0; i<cctk_lsh[0]; i++)
{
int index = CCTK_GFINDEX3D(cctkGH,i,j,k);
double X = x[index], Y = y[index], Z = z[index];
double R = sqrt(X*X + Y*Y + Z*Z);
phi_old[index] = phi[index] =
amplitude*exp( - sqr( (R - radius) / sigma ) );
}
//
// Apply symmetry boundary conditions
//
ApplySymmetry(cctkGH,"wavetoy::scalarevolve");
//
// Synchronise
//
CCTK_SyncGroup(cctkGH,"wavetoy::scalarevolve");
return;
}
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