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c Written 2002-05-22 by Erik Schnetter <schnetter@uni-tuebingen.de>
c $Header$
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Functions.h"
#include "cctk_Parameters.h"
subroutine IDLinearWaves_StandWaves (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
CCTK_REAL pi
parameter (pi = 3.14159265358979d0)
CCTK_REAL aa, kk
CCTK_REAL zz, tt
CCTK_REAL bb, bbdot
integer i,j,k
aa = amplitude
kk = 2*pi / wavelength
tt = cctk_time
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
zz = z(i,j,k)
bb = aa * sin(kk*zz) * cos(kk*tt)
bbdot = -kk*aa * sin(kk*zz) * sin(kk*tt)
gxx(i,j,k) = 1 + bb
gxy(i,j,k) = 0
gxz(i,j,k) = 0
gyy(i,j,k) = 1 - bb
gyz(i,j,k) = 0
gzz(i,j,k) = 1
kxx(i,j,k) = bbdot / (-2)
kxy(i,j,k) = 0
kxz(i,j,k) = 0
kyy(i,j,k) = - bbdot / (-2)
kyz(i,j,k) = 0
kzz(i,j,k) = 0
end do
end do
end do
c initialise the conformal factor
if (CCTK_EQUALS(metric_type, "static conformal")) then
conformal_state = 1
if (CCTK_EQUALS(conformal_storage,"factor+derivs")) then
conformal_state = 2
else if (CCTK_EQUALS(conformal_storage,"factor+derivs+2nd derivs")) then
conformal_state = 3
end if
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
psi(i,j,k) = 1
if (conformal_state .gt. 1) then
psix(i,j,k) = 0
psiy(i,j,k) = 0
psiz(i,j,k) = 0
end if
if (conformal_state .gt. 2) then
psixy(i,j,k) = 0
psixz(i,j,k) = 0
psiyz(i,j,k) = 0
psixx(i,j,k) = 0
psiyy(i,j,k) = 0
psizz(i,j,k) = 0
end if
end do
end do
end do
end if
end
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