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#define THORN_IS_grid
#include "cctk.h"
#include "declare_arguments.h"
#include "declare_parameters.h"
subroutine CartGrid3D(CCTK_FARGUMENTS)
implicit none
DECLARE_CCTK_FARGUMENTS
DECLARE_PARAMETERS
integer :: iflag, iconv, i, j, k
REAL :: x0,y0,z0, dx, dy, dz
integer :: CCTK_Equals
iflag = 0
iconv = 2**convlevel
print *,"grid_xmin = ",grid_xmin
c Defining all the parameters
c ---------------------------
grid_xmin = -1.0
grid_xmax = 1.0
grid_ymin = -1.0
grid_ymax = 1.0
grid_zmin = -1.0
grid_zmax = 1.0
c First, grids that ignore dx,dy,dz
c ---------------------------------
c if (CCTK_Equals(grid,'minmax')) 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)
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))')
& 'Minmax grid: ','dx=>',dx,'dy=>',dy,'dz=>',dz
c elseif (CCTK_Equals(grid,'box')) then
c iflag = iflag + 1
c x0 = -0.5
c y0 = -0.5
c z0 = -0.5
c dx = 1.d0/max(global_nx-1,1)
c dy = 1.d0/max(global_ny-1,1)
c dz = 1.d0/max(global_nz-1,1)
c if (global_nx == 1) x0 = 0.0D0
c if (global_ny == 1) y0 = 0.0D0
c if (global_nz == 1) z0 = 0.0D0
c write(*,'(1X,A,1X,3(A,G12.7,2X))')
c & 'Box grid: Resetting ','dx=>',dx,'dy=>',dy,'dz=>',dz
c Now, grids that use dx,dy,dz
c ----------------------------
c else
c dx = grid_dx*iconv
c dy = grid_dy*iconv
c dz = grid_dz*iconv
c if (CCTK_Equals(grid,'bitant')) then
c iflag = iflag + 1
c x0 = (0.5 - global_nx/2)*dx
c y0 = (0.5 - global_ny/2)*dy
c if(nghostzones == 2) then
c z0 = -1.5*dz
c else
c z0 = -0.5*dz
c end if
c end if
c if (CCTK_Equals(grid,'quadrant')) then
c iflag = iflag + 1
c if(nghostzones == 2) then
c x0 = -1.5D0*dx
c y0 = -1.5D0*dy
c else
c x0 = -0.5D0*dx
c y0 = -0.5D0*dy
c end if
c z0 = (0.5D0 - global_nz/2)*dz
c end if
c if (CCTK_Equals(grid,'octant')) then
c if(nghostzones == 2) then
c iflag = iflag + 1
c x0 = -1.5*dx
c y0 = -1.5*dy
c z0 = -1.5*dz
c else
c iflag = iflag + 1
c x0 = -0.5*dx
c y0 = -0.5*dy
c z0 = -0.5*dz
c end if
c end if
c if (CCTK_Equals(grid,'full')) then
c iflag = iflag + 1
c x0 = (0.5 - global_nx/2)*dx
c y0 = (0.5 - global_ny/2)*dy
c z0 = (0.5 - global_nz/2)*dz
c end if
c end if
c No grid was set up
c ------------------
c if (iflag.ne.1) then
c write(*,*) 'setbasegrid error: check your grid keyword'
c STOP
c endif
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
end do
end do
end do
r = sqrt(x**2 + y**2 + z**2)
return
end subroutine CartGrid3D
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