Actual source code: ex40.c


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

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

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

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

 20:   DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_MIRROR, DM_BOUNDARY_MIRROR, DMDA_STENCIL_STAR, M, N, PETSC_DECIDE, PETSC_DECIDE, dof, stencil_width, NULL, NULL, &da);
 21:   DMSetFromOptions(da);
 22:   DMSetUp(da);
 23:   DMDAGetCorners(da, &xstart, &ystart, 0, &m, &n, 0);

 25:   DMCreateGlobalVector(da, &global);
 26:   DMDAVecGetArrayDOF(da, global, &vglobal);
 27:   for (j = ystart; j < ystart + n; j++) {
 28:     for (i = xstart; i < xstart + m; i++) {
 29:       for (c = 0; c < dof; c++) vglobal[j][i][c] = 100 * j + 10 * (i + 1) + c;
 30:     }
 31:   }
 32:   DMDAVecRestoreArrayDOF(da, global, &vglobal);

 34:   DMCreateLocalVector(da, &local);
 35:   DMGlobalToLocalBegin(da, global, INSERT_VALUES, local);
 36:   DMGlobalToLocalEnd(da, global, INSERT_VALUES, local);

 38:   PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview);
 39:   VecView(local, sview);
 40:   PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview);
 41:   PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);
 42:   VecView(global, PETSC_VIEWER_STDOUT_WORLD);

 44:   DMDestroy(&da);
 45:   VecDestroy(&local);
 46:   VecDestroy(&global);

 48:   PetscFinalize();
 49:   return 0;
 50: }

 52: /*TEST

 54:    test:

 56:    test:
 57:       suffix: 2
 58:       nsize: 4
 59:       filter: grep -v "Vec Object"

 61: TEST*/