diff options
Diffstat (limited to 'src/Derivatives2_2_1.F90')
| -rw-r--r-- | src/Derivatives2_2_1.F90 | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/Derivatives2_2_1.F90 b/src/Derivatives2_2_1.F90 new file mode 100644 index 0000000..a02f890 --- /dev/null +++ b/src/Derivatives2_2_1.F90 @@ -0,0 +1,119 @@ +#include "cctk.h" +#include "cctk_Functions.h" +#include "cctk_Parameters.h" + +subroutine deriv2_gf_2_1 ( var, ni, nj, nk, dir, bb, gsize, delta, dvar2 ) + + use All_Coeffs_mod + + implicit none + + DECLARE_CCTK_FUNCTIONS + DECLARE_CCTK_PARAMETERS + + CCTK_INT, intent(IN) :: ni, nj, nk + CCTK_REAL, dimension(ni,nj,nk), intent(IN) :: var + CCTK_INT, intent(IN) :: dir + CCTK_INT, intent(IN) :: bb(2) + CCTK_INT, intent(IN) :: gsize + CCTK_REAL, intent(IN) :: delta + CCTK_REAL, dimension(ni,nj,nk), intent(OUT) :: dvar2 + + CCTK_REAL, dimension(2), save :: a + CCTK_REAL, dimension(3,2), save :: q + CCTK_REAL :: idel2 + + CCTK_INT :: il, ir, jl, jr, kl, kr + + logical, save :: first = .true. + + if ( first ) then + call coeffs_2_2_1 ( a, q ) + first = .false. + end if + + idel2 = 1.0_wp / delta**2 + + direction: select case (dir) + case (0) direction + if ( bb(1) == 0 ) then + il = 1 + gsize + else + dvar2(1,:,:) = ( q(1,1) * var(1,:,:) + q(2,1) * var(2,:,:) + & + q(3,1) * var(3,:,:) ) * idel2 + dvar2(2,:,:) = ( q(1,2) * var(1,:,:) + q(2,2) * var(2,:,:) + & + q(3,2) * var(3,:,:) ) * idel2 + il = 3 + end if + if ( bb(2) == 0 ) then + ir = ni - gsize + else + dvar2(ni-1,:,:) = ( q(1,2) * var(ni,:,:) + & + q(2,2) * var(ni-1,:,:) + & + q(3,2) * var(ni-2,:,:) ) * idel2 + dvar2(ni,:,:) = ( q(1,1) * var(ni,:,:) + & + q(2,1) * var(ni-1,:,:) + & + q(3,1) * var(ni-2,:,:) ) * idel2 + ir = ni - 2 + end if + dvar2(il:ir,:,:) = ( a(2) * ( var(il+1:ir+1,:,:) + & + var(il-1:ir-1,:,:) ) + & + a(1) * var(il:ir,:,:) ) * idel2 + case (1) direction + if ( zero_derivs_y /= 0 ) then + dvar2 = zero + else + if ( bb(1) == 0 ) then + jl = 1 + gsize + else + dvar2(:,1,:) = ( q(1,1) * var(:,1,:) + q(2,1) * var(:,2,:) + & + q(3,1) * var(:,3,:) ) * idel2 + dvar2(:,2,:) = ( q(1,2) * var(:,1,:) + q(2,2) * var(:,2,:) + & + q(3,2) * var(:,3,:) ) * idel2 + jl = 3 + end if + if ( bb(2) == 0 ) then + jr = nj - gsize + else + dvar2(:,nj-1,:) = ( q(1,2) * var(:,nj,:) + & + q(2,2) * var(:,nj-1,:) + & + q(3,2) * var(:,nj-2,:) ) * idel2 + dvar2(:,nj,:) = ( q(1,1) * var(:,nj,:) + & + q(2,1) * var(:,nj-1,:) + & + q(3,1) * var(:,nj-2,:) ) * idel2 + jr = nj - 2 + end if + dvar2(:,jl:jr,:) = ( a(2) * ( var(:,jl+1:jr+1,:) + & + var(:,jl-1:jr-1,:) ) + & + a(1) * var(:,jl:jr,:) ) * idel2 + end if + case (2) direction + if ( zero_derivs_z /= 0 ) then + dvar2 = zero + else + if ( bb(1) == 0 ) then + kl = 1 + gsize + else + dvar2(:,:,1) = ( q(1,1) * var(:,:,1) + q(2,1) * var(:,:,2) + & + q(3,1) * var(:,:,3) ) * idel2 + dvar2(:,:,2) = ( q(1,2) * var(:,:,1) + q(2,2) * var(:,:,2) + & + q(3,2) * var(:,:,3) ) * idel2 + kl = 3 + end if + if ( bb(2) == 0 ) then + kr = nk - gsize + else + dvar2(:,:,nk-1) = ( q(1,2) * var(:,:,nk) + & + q(2,2) * var(:,:,nk-1) + & + q(3,2) * var(:,:,nk-2) ) * idel2 + dvar2(:,:,nk) = ( q(1,1) * var(:,:,nk) + & + q(2,1) * var(:,:,nk-1) + & + q(3,1) * var(:,:,nk-2) ) * idel2 + kr = nk - 2 + end if + dvar2(:,:,kl:kr) = ( a(2) * ( var(:,:,kl+1:kr+1) + & + var(:,:,kl-1:kr-1) ) + & + a(1) * var(:,:,kl:kr) ) * idel2 + end if + end select direction +end subroutine deriv2_gf_2_1 |