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c $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDScalarWaveExpl/src/initialdata.F77,v 1.2 2003/11/05 16:18:40 schnetter Exp $
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Functions.h"
#include "cctk_Parameters.h"
subroutine IDScalarWaveExpl_InitialData (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
CCTK_REAL pi
parameter (pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117068d0)
CCTK_REAL omega
integer i, j, k
omega = sqrt(wave_number(1)**2 + wave_number(2)**2 + wave_number(3)**2)
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
phi(i,j,k) = amplitude * cos (2*pi *
$ ( wave_number(1)*(x(i,j,k)-phase_offset(1))
$ + wave_number(2)*(y(i,j,k)-phase_offset(2))
$ + wave_number(3)*(z(i,j,k)-phase_offset(3))
$ + omega*(cctk_time-time_offset)))
psi(i,j,k) = - amplitude * 2*pi * omega * sin (2*pi *
$ ( wave_number(1)*(x(i,j,k)-phase_offset(1))
$ + wave_number(2)*(y(i,j,k)-phase_offset(2))
$ + wave_number(3)*(z(i,j,k)-phase_offset(3))
$ + omega*(cctk_time-time_offset)))
end do
end do
end do
end
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