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Diffstat (limited to 'CarpetExtra/WaveToyExpl/src/intstep.F77')
| -rw-r--r-- | CarpetExtra/WaveToyExpl/src/intstep.F77 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/CarpetExtra/WaveToyExpl/src/intstep.F77 b/CarpetExtra/WaveToyExpl/src/intstep.F77 new file mode 100644 index 000000000..909842c2a --- /dev/null +++ b/CarpetExtra/WaveToyExpl/src/intstep.F77 @@ -0,0 +1,33 @@ +c $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/WaveToyExpl/src/intstep.F77,v 1.2 2003/10/27 15:31:40 schnetter Exp $ + +#include "cctk.h" +#include "cctk_Arguments.h" +#include "cctk_Functions.h" +#include "cctk_Parameters.h" + + subroutine WaveToyExpl_IntStep (CCTK_ARGUMENTS) + implicit none + DECLARE_CCTK_ARGUMENTS + DECLARE_CCTK_FUNCTIONS + DECLARE_CCTK_PARAMETERS + CCTK_REAL dx(3), dt + integer i, j, k + integer d + do d=1,3 + dx(d) = CCTK_DELTA_SPACE(d) + end do + dt = CCTK_DELTA_TIME + do k=1+cctk_nghostzones(3),cctk_lsh(3)-cctk_nghostzones(3) + do j=1+cctk_nghostzones(2),cctk_lsh(2)-cctk_nghostzones(2) + do i=1+cctk_nghostzones(1),cctk_lsh(1)-cctk_nghostzones(1) +c d/dt phi = psi + phiint(i,j,k) = phi_p(i,j,k) + dt * psi_p(i,j,k) +c d/dt psi = d^2/dx^2 phi + psiint(i,j,k) = psi_p(i,j,k) + dt * + $ ( (phi_p(i-1,j,k) - 2*phi_p(i,j,k) + phi_p(i+1,j,k)) / dx(1)**2 + $ + (phi_p(i,j-1,k) - 2*phi_p(i,j,k) + phi_p(i,j+1,k)) / dx(2)**2 + $ + (phi_p(i,j,k-1) - 2*phi_p(i,j,k) + phi_p(i,j,k+1)) / dx(3)**2) + end do + end do + end do + end |