1 static char help[] = "Tests mirror boundary conditions in 3-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 = 4, N = 5, P = 6, stencil_width = 1, dof = 1, m, n, p, xstart, ystart, zstart, i, j, k, c;
9 DM da;
10 Vec global, local;
11 PetscScalar ****vglobal;
12 PetscViewer sview;
13 PetscScalar sum;
14
15 PetscFunctionBeginUser;
16 PetscCall(PetscInitialize(&argc, &argv, NULL, help));
17 PetscCall(PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0));
18 PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0));
19
20 PetscCall(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));
21 PetscCall(DMSetFromOptions(da));
22 PetscCall(DMSetUp(da));
23 PetscCall(DMDAGetCorners(da, &xstart, &ystart, &zstart, &m, &n, &p));
24
25 PetscCall(DMCreateGlobalVector(da, &global));
26 PetscCall(DMDAVecGetArrayDOF(da, global, &vglobal));
27 for (k = zstart; k < zstart + p; k++) {
28 for (j = ystart; j < ystart + n; j++) {
29 for (i = xstart; i < xstart + m; i++) {
30 for (c = 0; c < dof; c++) vglobal[k][j][i][c] = 1000 * k + 100 * j + 10 * i + c;
31 }
32 }
33 }
34 PetscCall(DMDAVecRestoreArrayDOF(da, global, &vglobal));
35
36 PetscCall(DMCreateLocalVector(da, &local));
37 PetscCall(DMGlobalToLocalBegin(da, global, ADD_VALUES, local));
38 PetscCall(DMGlobalToLocalEnd(da, global, ADD_VALUES, local));
39
40 PetscCall(VecSum(local, &sum));
41 PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "sum %g\n", (double)PetscRealPart(sum)));
42 PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, stdout));
43 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview));
44 PetscCall(VecView(local, sview));
45 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview));
46
47 PetscCall(DMDestroy(&da));
48 PetscCall(VecDestroy(&local));
49 PetscCall(VecDestroy(&global));
50
51 PetscCall(PetscFinalize());
52 return 0;
53 }
54
55 /*TEST
56
57 test:
58
59 test:
60 suffix: 2
61 nsize: 3
62
63 TEST*/
64