Actual source code: ex32.c
1: static char help[] = "Test DMStagRestrictSimple()\n\n";
3: #include <petscdmstag.h>
5: int main(int argc, char **argv)
6: {
7: DM dm, dm_coarse;
8: Vec vec, vec_coarse, vec_local, vec_local_coarse;
9: PetscInt dim, size_coarse;
10: PetscReal norm;
13: PetscInitialize(&argc, &argv, (char *)0, help);
14: dim = 2;
15: PetscOptionsGetInt(NULL, NULL, "-dim", &dim, NULL);
16: switch (dim) {
17: case 1:
18: DMStagCreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, 8, 2, 3, DMSTAG_STENCIL_BOX, 1, NULL, &dm);
19: break;
20: case 2:
21: DMStagCreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, 8, 16, PETSC_DECIDE, PETSC_DECIDE, 2, 3, 4, DMSTAG_STENCIL_BOX, 1, NULL, NULL, &dm);
22: break;
23: case 3:
24: DMStagCreate3d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, 4, 8, 12, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, 2, 3, 4, 3, DMSTAG_STENCIL_BOX, 1, NULL, NULL, NULL, &dm);
25: break;
26: default:
27: SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_SUP, "Not Implemented!");
28: }
29: DMSetFromOptions(dm);
30: DMSetUp(dm);
31: DMCoarsen(dm, MPI_COMM_NULL, &dm_coarse);
33: DMCreateGlobalVector(dm, &vec);
34: VecSet(vec, 1.0);
35: DMCreateLocalVector(dm, &vec_local);
36: DMGlobalToLocal(dm, vec, INSERT_VALUES, vec_local);
38: DMCreateGlobalVector(dm_coarse, &vec_coarse);
39: DMCreateLocalVector(dm_coarse, &vec_local_coarse);
41: DMStagRestrictSimple(dm, vec_local, dm_coarse, vec_local_coarse);
43: DMLocalToGlobal(dm_coarse, vec_local_coarse, INSERT_VALUES, vec_coarse);
45: VecGetSize(vec_coarse, &size_coarse);
46: VecNorm(vec_coarse, NORM_1, &norm);
48: VecDestroy(&vec_coarse);
49: VecDestroy(&vec);
50: VecDestroy(&vec_local_coarse);
51: VecDestroy(&vec_local);
52: DMDestroy(&dm_coarse);
53: DMDestroy(&dm);
54: PetscFinalize();
55: return 0;
56: }
58: /*TEST
60: test:
61: suffix: 1d
62: nsize: 1
63: args: -dim 1
65: test:
66: suffix: 1d_par
67: nsize: 4
68: args: -dim 1
70: test:
71: suffix: 2d
72: nsize: 1
73: args: -dim 2
75: test:
76: suffix: 2d_par
77: nsize: 2
78: args: -dim 2
80: test:
81: suffix: 2d_par_2
82: nsize: 8
83: args: -dim 2
84: test:
85: suffix: 3d
86: nsize: 1
87: args: -dim 3
89: test:
90: suffix: 3d_par
91: nsize: 2
92: args: -dim 3
93: TEST*/