1 static char help[] = "Tests mirror boundary conditions in 2-d.\n\n";
2
3 #include <petscdm.h>
4 #include <petscdmda.h>
5
main(int argc,char ** argv)6 int main(int argc, char **argv)
7 {
8 PetscInt M = 8, N = 8, stencil_width = 1, dof = 1, m, n, xstart, ystart, i, j, c;
9 DM da;
10 Vec global, local;
11 PetscScalar ***vglobal;
12 PetscViewer sview;
13
14 PetscFunctionBeginUser;
15 PetscCall(PetscInitialize(&argc, &argv, NULL, help));
16 PetscCall(PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0));
17 PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0));
18
19 PetscCall(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));
20 PetscCall(DMSetFromOptions(da));
21 PetscCall(DMSetUp(da));
22 PetscCall(DMDAGetCorners(da, &xstart, &ystart, 0, &m, &n, 0));
23
24 PetscCall(DMCreateGlobalVector(da, &global));
25 PetscCall(DMDAVecGetArrayDOF(da, global, &vglobal));
26 for (j = ystart; j < ystart + n; j++) {
27 for (i = xstart; i < xstart + m; i++) {
28 for (c = 0; c < dof; c++) vglobal[j][i][c] = 100 * j + 10 * (i + 1) + c;
29 }
30 }
31 PetscCall(DMDAVecRestoreArrayDOF(da, global, &vglobal));
32
33 PetscCall(DMCreateLocalVector(da, &local));
34 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local));
35 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local));
36
37 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview));
38 PetscCall(VecView(local, sview));
39 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview));
40 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD));
41
42 PetscCall(DMDestroy(&da));
43 PetscCall(VecDestroy(&local));
44 PetscCall(VecDestroy(&global));
45
46 PetscCall(PetscFinalize());
47 return 0;
48 }
49
50 /*TEST
51
52 test:
53
54 test:
55 suffix: 2
56 nsize: 4
57 filter: grep -v "Vec Object"
58
59 TEST*/
60