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/*@@
@file CartGrid3D.F
@date Thu Feb 18
@author Gabrielle Allen
@desc
Set up coordinates for a 3D Cartesian grid
@enddesc
@@*/
/*#define CARTGRID3D_DEBUG*/
#include "cctk.h"
#include "declare_arguments.h"
#include "declare_parameters.h"
subroutine CartGrid3D(CCTK_FARGUMENTS)
implicit none
DECLARE_CCTK_FARGUMENTS
DECLARE_PARAMETERS
integer :: CCTK_Equals
integer :: iflag, iconv, i, j, k
REAL :: x0,y0,z0,dx,dy,dz
iflag = 0
iconv = 2**convlevel
c --------------------------------------------------------------
c
c BYRANGE
c
c User gives: minimum and maximum values of coordinates and
c the number of gridpoints on the coarse grid
c
c --------------------------------------------------------------
if (CCTK_Equals(grid,'byrange') == 1) then
iflag = iflag +1
if (CCTK_Equals(symmetry,'octant') == 1) then
iflag = iflag +1
c Grid spacing on coarsest grid
coarse_dx = grid_xmax/(DBLE(global_sh(1))-1.5d0)
coarse_dy = grid_ymax/(DBLE(global_sh(2))-1.5d0)
coarse_dz = grid_zmax/(DBLE(global_sh(3))-1.5d0)
c Grid spacing on this grid
dx = -coarse_dx*0.5d0
dy = -coarse_dy*0.5d0
dz = -coarse_dz*0.5d0
c Minimum coordinate values on this grid
x0 = (0.5-dble(nghostzones))*dx
y0 = (0.5-dble(nghostzones))*dy
z0 = (0.5-dble(nghostzones))*dz
else if (CCTK_Equals(symmetry,'quadrant') == 1) then
iflag = iflag +1
print *,"FIXME"
else if (CCTK_Equals(symmetry,'bitant') == 1) then
iflag = iflag +1
print *,"FIXME"
else if (CCTK_Equals(symmetry,'full') == 1) then
iflag = iflag +1
c Set minimum values of coordinates
x0 = grid_xmin
y0 = grid_ymin
z0 = grid_zmin
c dx,dy,dz on the coarsest grid of each GH
coarse_dx = (grid_xmax-grid_xmin)/max(global_sh(1)-1,1)
coarse_dy = (grid_ymax-grid_ymin)/max(global_sh(2)-1,1)
coarse_dz = (grid_zmax-grid_zmin)/max(global_sh(3)-1,1)
end if
c dx,dy,dz on the grid we are on
dx = coarse_dx/levfac
dy = coarse_dy/levfac
dz = coarse_dz/levfac
write(*,'(1X,A,1X,3(A,G12.7,2X))')
& 'Grid by range: Setting ','dx=>',dx,'dy=>',dy,'dz=>',dz
c -----------------------------------------------------------
c
c BYSPACING
c
c User gives: grid spacing on the coarsest GH and
c the number of gridpoints on the coarsest GH
c
c -----------------------------------------------------------
else if (CCTK_Equals(grid,'byspacing') == 1) then
c dx, dy, dz on the grid we are on
dx = grid_dx*iconv/levfac
dy = grid_dy*iconv/levfac
dz = grid_dz*iconv/levfac
if (CCTK_Equals(symmetry,'bitant') == 1) then
iflag = iflag + 1
x0 = (0.5 - global_sh(1)/2)*dx
y0 = (0.5 - global_sh(2)/2)*dy
z0 = (-dble(nghostzones)+0.5d0)*dz
else if (CCTK_Equals(symmetry,'quadrant') == 1) then
iflag = iflag + 1
x0 = (-dble(nghostzones)+0.5d0)*dx
y0 = (-dble(nghostzones)+0.5d0)*dy
z0 = (0.5D0 - global_sh(3)/2)*dz
else if (CCTK_Equals(symmetry,'octant') == 1) then
iflag = iflag + 1
x0 = (-dble(nghostzones)+0.5d0)*dx
y0 = (-dble(nghostzones)+0.5d0)*dy
z0 = (-dble(nghostzones)+0.5d0)*dz
else if (CCTK_Equals(symmetry,'full')==1) then
iflag = iflag + 1
x0 = (0.5 - global_sh(1)/2)*dx
y0 = (0.5 - global_sh(2)/2)*dy
z0 = (0.5 - global_sh(3)/2)*dz
end if
c --------------------------------------------------------------
c
c BOX (-0.5 to 0.5)
c
c User gives: number of gridpoints on the coarse grid
c
c --------------------------------------------------------------
elseif (CCTK_Equals(grid,'box')==1) then
iflag = iflag + 1
c Coordinates are all -0.5 to 0.5
x0 = -0.5
y0 = -0.5
z0 = -0.5
c dx,dy,dz on the coarsest grid of each GH
coarse_dx = 1.d0/max(global_sh(1)-1,1)
coarse_dy = 1.d0/max(global_sh(1)-1,1)
coarse_dz = 1.d0/max(global_sh(1)-1,1)
c dx,dy,dz on the grid we are on
dx = coarse_dx/levfac
dy = coarse_dy/levfac
dz = coarse_dz/levfac
c Special cases
if (global_sh(1) == 1) x0 = 0.0D0
if (global_sh(2) == 1) y0 = 0.0D0
if (global_sh(3) == 1) z0 = 0.0D0
write(*,'(1X,A,1X,3(A,G12.7,2X))')
& 'Box grid: Setting ','dx=>',dx,'dy=>',dy,'dz=>',dz
end if
c No grid was set up
c ------------------
if (iflag.ne.1) then
call CCTK_Warn(0,"No grid set up in CartGrid3D")
call CCTK_Exit(GH)
end if
c Set spatial coordinates
c -----------------------
do i=1,sh(1)
do j=1,sh(2)
do k=1,sh(3)
x(i,j,k) = dx*(i+lb(1)-1) + x0
y(i,j,k) = dy*(j+lb(2)-1) + y0
z(i,j,k) = dz*(k+lb(3)-1) + z0
#ifdef CARTGRID3D_DEBUG
write(*,*) "Index: ",i,j,k
write(*,*) "Coord: ",x(i,j,k),y(i,j,k),z(i,j,k)
#endif
end do
end do
end do
r = sqrt(x**2 + y**2 + z**2)
delta_space(1) = dx
delta_space(2) = dy
delta_space(3) = dz
return
end subroutine CartGrid3D
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