Actual source code: ex41.c


  2: static char help[] = "Tests mirror boundary conditions in 3-d.\n\n";

  4: #include <petscdm.h>
  5: #include <petscdmda.h>

  7: int main(int argc, char **argv)
  8: {
  9:   PetscInt        M = 2, N = 3, P = 4, stencil_width = 1, dof = 1, m, n, p, xstart, ystart, zstart, i, j, k, c;
 10:   DM              da;
 11:   Vec             global, local;
 12:   PetscScalar ****vglobal;
 13:   PetscViewer     sview;
 14:   PetscScalar     sum;

 17:   PetscInitialize(&argc, &argv, (char *)0, help);
 18:   PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0);
 19:   PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0);

 21:   DMDACreate3d(PETSC_COMM_WORLD, DM_BOUNDARY_MIRROR, DM_BOUNDARY_MIRROR, DM_BOUNDARY_MIRROR, DMDA_STENCIL_STAR, M, N, P, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, dof, stencil_width, NULL, NULL, NULL, &da);
 22:   DMSetFromOptions(da);
 23:   DMSetUp(da);
 24:   DMDAGetCorners(da, &xstart, &ystart, &zstart, &m, &n, &p);

 26:   DMCreateGlobalVector(da, &global);
 27:   DMDAVecGetArrayDOF(da, global, &vglobal);
 28:   for (k = zstart; k < zstart + p; k++) {
 29:     for (j = ystart; j < ystart + n; j++) {
 30:       for (i = xstart; i < xstart + m; i++) {
 31:         for (c = 0; c < dof; c++) vglobal[k][j][i][c] = 1000 * k + 100 * j + 10 * i + c;
 32:       }
 33:     }
 34:   }
 35:   DMDAVecRestoreArrayDOF(da, global, &vglobal);

 37:   DMCreateLocalVector(da, &local);
 38:   DMGlobalToLocalBegin(da, global, ADD_VALUES, local);
 39:   DMGlobalToLocalEnd(da, global, ADD_VALUES, local);

 41:   VecSum(local, &sum);
 42:   PetscSynchronizedPrintf(PETSC_COMM_WORLD, "sum %g\n", (double)PetscRealPart(sum));
 43:   PetscSynchronizedFlush(PETSC_COMM_WORLD, stdout);
 44:   PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview);
 45:   VecView(local, sview);
 46:   PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview);
 47:   PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);

 49:   DMDestroy(&da);
 50:   VecDestroy(&local);
 51:   VecDestroy(&global);

 53:   PetscFinalize();
 54:   return 0;
 55: }

 57: /*TEST

 59:    test:

 61:    test:
 62:      suffix: 2
 63:      nsize: 3

 65: TEST*/