1 static char help[] = "Tests DMDA interpolation.\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 M1 = 3, M2, dof = 1, s = 1, ratio = 2, dim = 1;
9 DM da_c, da_f;
10 Vec v_c, v_f;
11 Mat Interp;
12 PetscScalar one = 1.0;
13 PetscBool pt;
14 DMBoundaryType bx = DM_BOUNDARY_NONE, by = DM_BOUNDARY_NONE, bz = DM_BOUNDARY_NONE;
15
16 PetscFunctionBeginUser;
17 PetscCall(PetscInitialize(&argc, &argv, NULL, help));
18 PetscCall(PetscOptionsGetInt(NULL, NULL, "-dim", &dim, NULL));
19 PetscCall(PetscOptionsGetInt(NULL, NULL, "-M", &M1, NULL));
20 PetscCall(PetscOptionsGetInt(NULL, NULL, "-stencil_width", &s, NULL));
21 PetscCall(PetscOptionsGetInt(NULL, NULL, "-ratio", &ratio, NULL));
22 PetscCall(PetscOptionsGetInt(NULL, NULL, "-dof", &dof, NULL));
23 PetscCall(PetscOptionsGetBool(NULL, NULL, "-periodic", (PetscBool *)&pt, NULL));
24
25 if (pt) {
26 if (dim > 0) bx = DM_BOUNDARY_PERIODIC;
27 if (dim > 1) by = DM_BOUNDARY_PERIODIC;
28 if (dim > 2) bz = DM_BOUNDARY_PERIODIC;
29 }
30 if (bx == DM_BOUNDARY_NONE) {
31 M2 = ratio * (M1 - 1) + 1;
32 } else {
33 M2 = ratio * M1;
34 }
35
36 /* Set up the array */
37 if (dim == 1) {
38 PetscCall(DMDACreate1d(PETSC_COMM_WORLD, bx, M1, dof, s, NULL, &da_c));
39 PetscCall(DMDACreate1d(PETSC_COMM_WORLD, bx, M2, dof, s, NULL, &da_f));
40 } else if (dim == 2) {
41 PetscCall(DMDACreate2d(PETSC_COMM_WORLD, bx, by, DMDA_STENCIL_BOX, M1, M1, PETSC_DECIDE, PETSC_DECIDE, dof, s, NULL, NULL, &da_c));
42 PetscCall(DMDACreate2d(PETSC_COMM_WORLD, bx, by, DMDA_STENCIL_BOX, M2, M2, PETSC_DECIDE, PETSC_DECIDE, dof, s, NULL, NULL, &da_f));
43 } else if (dim == 3) {
44 PetscCall(DMDACreate3d(PETSC_COMM_WORLD, bx, by, bz, DMDA_STENCIL_BOX, M1, M1, M1, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, dof, s, NULL, NULL, NULL, &da_c));
45 PetscCall(DMDACreate3d(PETSC_COMM_WORLD, bx, by, bz, DMDA_STENCIL_BOX, M2, M2, M2, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, dof, s, NULL, NULL, NULL, &da_f));
46 } else SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_SUP, "dim must be 1,2, or 3");
47 PetscCall(DMSetFromOptions(da_c));
48 PetscCall(DMSetUp(da_c));
49 PetscCall(DMSetFromOptions(da_f));
50 PetscCall(DMSetUp(da_f));
51
52 PetscCall(DMCreateGlobalVector(da_c, &v_c));
53 PetscCall(DMCreateGlobalVector(da_f, &v_f));
54
55 PetscCall(VecSet(v_c, one));
56 PetscCall(DMCreateInterpolation(da_c, da_f, &Interp, NULL));
57 PetscCall(MatMult(Interp, v_c, v_f));
58 PetscCall(VecView(v_f, PETSC_VIEWER_STDOUT_WORLD));
59 PetscCall(MatMultTranspose(Interp, v_f, v_c));
60 PetscCall(VecView(v_c, PETSC_VIEWER_STDOUT_WORLD));
61
62 PetscCall(MatDestroy(&Interp));
63 PetscCall(VecDestroy(&v_c));
64 PetscCall(DMDestroy(&da_c));
65 PetscCall(VecDestroy(&v_f));
66 PetscCall(DMDestroy(&da_f));
67 PetscCall(PetscFinalize());
68 return 0;
69 }
70