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c -*-Fortran-*-
c $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/IDSpaceTimeToy/src/InitialData.F77,v 1.2 2001/03/19 21:30:42 eschnett Exp $
#include "cctk.h"
#include "cctk_Parameters.h"
#include "cctk_Arguments.h"
subroutine IDSpaceTimeToy_InitialData (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_PARAMETERS
DECLARE_CCTK_FUNCTIONS
CCTK_REAL pi
CCTK_REAL omega
integer i,j,k
pi = 4*atan(1.d0)
omega = sqrt(kx**2+ky**2+kz**2)
if (CCTK_EQUALS(initial_data,"plane")) then
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
phi(i,j,k) = amplitude
$ * cos((kx*cart3d_x(i,j,k) + ky*cart3d_y(i,j,k)
$ + kz*cart3d_z(i,j,k) + omega*cctk_time) * pi)
psi(i,j,k) = - amplitude
$ * sin((kx*cart3d_x(i,j,k) + ky*cart3d_y(i,j,k)
$ + kz*cart3d_z(i,j,k) + omega*cctk_time) * pi)
$ * pi * omega
end do
end do
end do
else if (CCTK_EQUALS(initial_data,"gaussian")) then
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
phi(i,j,k) = amplitude / spher3d_r(i,j,k)
$ * exp(- (spher3d_r(i,j,k) - radius - cctk_time)**2 / sigma**2)
psi(i,j,k) = phi(i,j,k)
$ * 2 * (spher3d_r(i,j,k) - radius - cctk_time) / sigma**2
end do
end do
end do
else if (CCTK_EQUALS(initial_data, "box")) then
c Use kx,ky,kz as number of modes in each direction.
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
phi(i,j,k) = amplitude
$ * sin(kx * (cart3d_x(i,j,k) - 0.5d0) * pi)
$ * sin(ky * (cart3d_y(i,j,k) - 0.5d0) * pi)
$ * sin(kz * (cart3d_z(i,j,k) - 0.5d0) * pi)
$ * cos(omega * cctk_time * pi)
psi(i,j,k) = - amplitude
$ * sin(kx * (cart3d_x(i,j,k) - 0.5d0) * pi)
$ * sin(ky * (cart3d_y(i,j,k) - 0.5d0) * pi)
$ * sin(kz * (cart3d_z(i,j,k) - 0.5d0) * pi)
$ * sin(omega * cctk_time * pi)
$ * omega * pi
end do
end do
end do
else
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
phi(i,j,k) = 0
psi(i,j,k) = 0
end do
end do
end do
end if
end
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