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#include "cctk.h"
#include "cctk_Parameters.h"
#include "cctk_Arguments.h"
#include "cctk_Functions.h"
/*@@
@routine Hydro_Analysis_FindSeparation
@date Thu May 20 12:35:20 2004
@author Ian Hawke
@desc
Finds the separation (in coordinate and proper distance)
between the NS. Equal mass symmetry is assumed so it is
actually the distance between the origin and the location
of maximum density. This is along a straight line, not a
geodesic, so still not perfect.
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
subroutine Hydro_Analysis_FindSeparation(CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_PARAMETERS
DECLARE_CCTK_FUNCTIONS
CCTK_REAL :: separation_dx, separation_dy, separation_dz
CCTK_REAL, dimension(:), allocatable :: separation_x, separation_y, &
separation_z
CCTK_REAL, dimension(:), allocatable :: s_gxx, s_gxy, s_gxz, &
s_gyy, s_gyz, s_gzz
CCTK_INT :: ierr, i
CCTK_INT :: param_table_handle, interp_handle, coord_system_handle
CCTK_INT :: vindex
CCTK_POINTER, dimension(3) :: interp_coords
CCTK_INT, dimension(6) :: in_array_indices
CCTK_POINTER, dimension(6) :: out_arrays
CCTK_INT, dimension(6) :: out_array_type_codes
!!$ Proper separation requires interpolation
allocate(separation_x(Hydro_Analysis_rho_max_origin_distance_npoints), &
separation_y(Hydro_Analysis_rho_max_origin_distance_npoints), &
separation_z(Hydro_Analysis_rho_max_origin_distance_npoints), STAT=ierr)
if (ierr .ne. 0) then
call CCTK_WARN(0, "Failed to allocate separation coordinate arrays")
end if
separation_dx = Hydro_Analysis_rho_max_loc(1) / dble(Hydro_Analysis_rho_max_origin_distance_npoints)
separation_dy = Hydro_Analysis_rho_max_loc(2) / dble(Hydro_Analysis_rho_max_origin_distance_npoints)
separation_dz = Hydro_Analysis_rho_max_loc(3) / dble(Hydro_Analysis_rho_max_origin_distance_npoints)
do i = 1, Hydro_Analysis_rho_max_origin_distance_npoints
separation_x(i) = i * separation_dx
separation_y(i) = i * separation_dy
separation_z(i) = i * separation_dz
end do
allocate(s_gxx(Hydro_Analysis_rho_max_origin_distance_npoints), &
s_gxy(Hydro_Analysis_rho_max_origin_distance_npoints), &
s_gxz(Hydro_Analysis_rho_max_origin_distance_npoints), &
s_gyy(Hydro_Analysis_rho_max_origin_distance_npoints), &
s_gyz(Hydro_Analysis_rho_max_origin_distance_npoints), &
s_gzz(Hydro_Analysis_rho_max_origin_distance_npoints), &
STAT=ierr)
if (ierr .ne. 0) then
call CCTK_WARN(0, "Failed to allocate separation metric arrays")
end if
param_table_handle = -1
interp_handle = -1
coord_system_handle = -1
call Util_TableCreateFromString (param_table_handle, "order = 2")
if (param_table_handle .lt. 0) then
call CCTK_WARN(0,"Cannot create parameter table for interpolator")
endif
call CCTK_InterpHandle (interp_handle, "uniform cartesian")
if (interp_handle.lt.0) then
call CCTK_WARN(0,"Cannot get handle for interpolation ! Forgot to activate an implementation providing interpolation operators (e.g. LocalInterp)?")
endif
call CCTK_CoordSystemHandle (coord_system_handle, "cart3d")
if (coord_system_handle .lt. 0) then
call CCTK_WARN(0,"Cannot get handle for cart3d coordinate system ! Forgot to activate an implementation providing coordinates (e.g. LocalInterp)?")
endif
! fill in the input/output arrays for the interpolator
interp_coords(1) = CCTK_PointerTo(separation_x)
interp_coords(2) = CCTK_PointerTo(separation_y)
interp_coords(3) = CCTK_PointerTo(separation_z)
call CCTK_VarIndex (vindex, "admbase::gxx")
in_array_indices(1) = vindex
call CCTK_VarIndex (vindex, "admbase::gyy")
in_array_indices(2) = vindex
call CCTK_VarIndex (vindex, "admbase::gzz")
in_array_indices(3) = vindex
call CCTK_VarIndex (vindex, "admbase::gxy")
in_array_indices(4) = vindex
call CCTK_VarIndex (vindex, "admbase::gxz")
in_array_indices(5) = vindex
call CCTK_VarIndex (vindex, "admbase::gyz")
in_array_indices(6) = vindex
out_arrays(1) = CCTK_PointerTo(s_gxx)
out_arrays(2) = CCTK_PointerTo(s_gyy)
out_arrays(3) = CCTK_PointerTo(s_gzz)
out_arrays(4) = CCTK_PointerTo(s_gxy)
out_arrays(5) = CCTK_PointerTo(s_gxz)
out_arrays(6) = CCTK_PointerTo(s_gyz)
out_array_type_codes = CCTK_VARIABLE_REAL
! Interpolation.
call CCTK_InterpGridArrays (ierr, cctkGH, 3, interp_handle,&
param_table_handle, coord_system_handle,&
Hydro_Analysis_rho_max_origin_distance_npoints, CCTK_VARIABLE_REAL, interp_coords,&
6, in_array_indices,&
6, out_array_type_codes, out_arrays)
if (ierr < 0) then
call CCTK_WARN (1, "interpolator call returned an error code");
endif
! release parameter table
call Util_TableDestroy (ierr, param_table_handle)
! Integrate using trapezoidal rule.
Hydro_Analysis_rho_max_origin_distance = 0.d0
do i=2, Hydro_Analysis_rho_max_origin_distance_npoints
Hydro_Analysis_rho_max_origin_distance = Hydro_Analysis_rho_max_origin_distance + 0.5d0 &
*(sqrt(s_gxx(i-1)*separation_dx**2 + &
s_gyy(i-1)*separation_dy**2 + &
s_gzz(i-1)*separation_dz**2 &
+ 2.d0*(s_gxy(i-1)*separation_dx*separation_dy + &
s_gxz(i-1)*separation_dx*separation_dz + &
s_gyz(i-1)*separation_dy*separation_dz)) &
+ sqrt(s_gxx(i )*separation_dx**2 + &
s_gyy(i )*separation_dy**2 + &
s_gzz(i )*separation_dz**2 &
+ 2.d0*(s_gxy(i )*separation_dx*separation_dy + &
s_gxz(i )*separation_dx*separation_dz + &
s_gyz(i )*separation_dy*separation_dz)))
end do
end subroutine Hydro_Analysis_FindSeparation
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