1 static char help[] = "Tests DMLocalToGlobal() for dof > 1\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 = 6, N = 5, m = PETSC_DECIDE, n = PETSC_DECIDE, i, j, is, js, in, jen;
9 DM da;
10 Vec local, global;
11 PetscScalar ***l;
12
13 PetscFunctionBeginUser;
14 PetscCall(PetscInitialize(&argc, &argv, NULL, help));
15 /* Create distributed array and get vectors */
16 PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_BOX, M, N, m, n, 3, 1, NULL, NULL, &da));
17 PetscCall(DMSetFromOptions(da));
18 PetscCall(DMSetUp(da));
19 PetscCall(DMCreateGlobalVector(da, &global));
20 PetscCall(DMCreateLocalVector(da, &local));
21
22 PetscCall(DMDAGetCorners(da, &is, &js, 0, &in, &jen, 0));
23 PetscCall(DMDAVecGetArrayDOF(da, local, &l));
24 for (i = is; i < is + in; i++) {
25 for (j = js; j < js + jen; j++) {
26 l[j][i][0] = 3 * (i + j * M);
27 l[j][i][1] = 3 * (i + j * M) + 1;
28 l[j][i][2] = 3 * (i + j * M) + 2;
29 }
30 }
31 PetscCall(DMDAVecRestoreArrayDOF(da, local, &l));
32 PetscCall(DMLocalToGlobalBegin(da, local, ADD_VALUES, global));
33 PetscCall(DMLocalToGlobalEnd(da, local, ADD_VALUES, global));
34
35 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD));
36
37 /* Free memory */
38 PetscCall(VecDestroy(&local));
39 PetscCall(VecDestroy(&global));
40 PetscCall(DMDestroy(&da));
41 PetscCall(PetscFinalize());
42 return 0;
43 }
44
45 /*TEST
46
47 test:
48 filter: grep -v -i Process
49 output_file: output/ex24_1.out
50
51 test:
52 suffix: 2
53 nsize: 2
54 filter: grep -v -i Process
55 output_file: output/ex24_2.out
56
57 test:
58 suffix: 3
59 nsize: 3
60 filter: grep -v -i Process
61 output_file: output/ex24_2.out
62
63 test:
64 suffix: 4
65 nsize: 4
66 filter: grep -v -i Process
67 output_file: output/ex24_2.out
68
69 test:
70 suffix: 5
71 nsize: 5
72 filter: grep -v -i Process
73 output_file: output/ex24_2.out
74
75 test:
76 suffix: 6
77 nsize: 6
78 filter: grep -v -i Process
79 output_file: output/ex24_2.out
80
81 TEST*/
82