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#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Functions.h"
#include "cctk_Parameters.h"
subroutine WaveToyMoL_CalcRHS (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
CCTK_INT bndwidth
parameter (bndwidth = 1)
integer imin(3), imax(3)
CCTK_REAL dx(3)
integer i, j, k
integer d
do d=1,3
imin(d) = 1+bndwidth
imax(d) = cctk_lsh(d)-bndwidth
end do
do d=1,3
dx(d) = CCTK_DELTA_SPACE(3)
end do
do k=imin(3),imax(3)
do j=imin(2),imax(2)
do i=imin(1),imax(1)
phidot(i,j,k) = psi(i,j,k)
psidot(i,j,k) =
$ ( (phi(i-1,j,k) - 2*phi(i,j,k) + phi(i+1,j,k)) / dx(1)**2
$ + (phi(i,j-1,k) - 2*phi(i,j,k) + phi(i,j+1,k)) / dx(2)**2
$ + (phi(i,j,k-1) - 2*phi(i,j,k) + phi(i,j,k+1)) / dx(3)**2)
end do
end do
end do
end
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