Actual source code: ex25.c
1: static char help[] = "Tests DMLocalToGlobal() for dof > 1\n\n";
3: #include <petscdm.h>
4: #include <petscdmda.h>
6: int main(int argc, char **argv)
7: {
8: PetscInt M = 6, N = 5, P = 4, m = PETSC_DECIDE, n = PETSC_DECIDE, p = PETSC_DECIDE, i, j, k, is, js, ks, in, jen, kn;
9: DM da;
10: Vec local, global;
11: PetscScalar ****l;
13: PetscFunctionBeginUser;
14: PetscCall(PetscInitialize(&argc, &argv, NULL, help));
15: /* Create distributed array and get vectors */
16: PetscCall(DMDACreate3d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_BOX, M, N, P, m, n, p, 2, 1, NULL, NULL, NULL, &da));
17: PetscCall(DMSetFromOptions(da));
18: PetscCall(DMSetUp(da));
19: PetscCall(DMCreateGlobalVector(da, &global));
20: PetscCall(DMCreateLocalVector(da, &local));
22: PetscCall(DMDAGetCorners(da, &is, &js, &ks, &in, &jen, &kn));
23: PetscCall(DMDAVecGetArrayDOF(da, local, &l));
24: for (i = is; i < is + in; i++) {
25: for (j = js; j < js + jen; j++) {
26: for (k = ks; k < ks + kn; k++) {
27: l[k][j][i][0] = 2 * (i + j * M + k * M * N);
28: l[k][j][i][1] = 2 * (i + j * M + k * M * N) + 1;
29: }
30: }
31: }
32: PetscCall(DMDAVecRestoreArrayDOF(da, local, &l));
33: PetscCall(DMLocalToGlobalBegin(da, local, ADD_VALUES, global));
34: PetscCall(DMLocalToGlobalEnd(da, local, ADD_VALUES, global));
36: PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD));
38: /* Free memory */
39: PetscCall(VecDestroy(&local));
40: PetscCall(VecDestroy(&global));
41: PetscCall(DMDestroy(&da));
42: PetscCall(PetscFinalize());
43: return 0;
44: }
46: /*TEST
48: test:
49: filter: grep -v -i Process
50: output_file: output/ex25_1.out
52: test:
53: suffix: 2
54: nsize: 2
55: filter: grep -v -i Process
56: output_file: output/ex25_2.out
58: test:
59: suffix: 3
60: nsize: 3
61: filter: grep -v -i Process
62: output_file: output/ex25_2.out
64: test:
65: suffix: 4
66: nsize: 4
67: filter: grep -v -i Process
68: output_file: output/ex25_2.out
70: test:
71: suffix: 5
72: nsize: 5
73: filter: grep -v -i Process
74: output_file: output/ex25_2.out
76: test:
77: suffix: 6
78: nsize: 6
79: filter: grep -v -i Process
80: output_file: output/ex25_2.out
82: TEST*/