Actual source code: ex24.c
2: static char help[] = "Tests DMLocalToGlobal() for dof > 1\n\n";
4: #include <petscdm.h>
5: #include <petscdmda.h>
7: int main(int argc, char **argv)
8: {
9: PetscInt M = 6, N = 5, m = PETSC_DECIDE, n = PETSC_DECIDE, i, j, is, js, in, jen;
10: DM da;
11: Vec local, global;
12: PetscScalar ***l;
14: PetscFunctionBeginUser;
15: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help));
16: /* Create distributed array and get vectors */
17: PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_BOX, M, N, m, n, 3, 1, NULL, NULL, &da));
18: PetscCall(DMSetFromOptions(da));
19: PetscCall(DMSetUp(da));
20: PetscCall(DMCreateGlobalVector(da, &global));
21: PetscCall(DMCreateLocalVector(da, &local));
23: PetscCall(DMDAGetCorners(da, &is, &js, 0, &in, &jen, 0));
24: PetscCall(DMDAVecGetArrayDOF(da, local, &l));
25: for (i = is; i < is + in; i++) {
26: for (j = js; j < js + jen; j++) {
27: l[j][i][0] = 3 * (i + j * M);
28: l[j][i][1] = 3 * (i + j * M) + 1;
29: l[j][i][2] = 3 * (i + j * M) + 2;
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/ex24_1.out
52: test:
53: suffix: 2
54: nsize: 2
55: filter: grep -v -i Process
56: output_file: output/ex24_2.out
58: test:
59: suffix: 3
60: nsize: 3
61: filter: grep -v -i Process
62: output_file: output/ex24_2.out
64: test:
65: suffix: 4
66: nsize: 4
67: filter: grep -v -i Process
68: output_file: output/ex24_2.out
70: test:
71: suffix: 5
72: nsize: 5
73: filter: grep -v -i Process
74: output_file: output/ex24_2.out
76: test:
77: suffix: 6
78: nsize: 6
79: filter: grep -v -i Process
80: output_file: output/ex24_2.out
82: TEST*/