Actual source code: ex15.c
2: static char help[] = "Tests DMDA interpolation.\n\n";
4: #include <petscdm.h>
5: #include <petscdmda.h>
7: int main(int argc, char **argv)
8: {
9: PetscInt M1 = 3, M2, dof = 1, s = 1, ratio = 2, dim = 1;
10: DM da_c, da_f;
11: Vec v_c, v_f;
12: Mat Interp;
13: PetscScalar one = 1.0;
14: PetscBool pt;
15: DMBoundaryType bx = DM_BOUNDARY_NONE, by = DM_BOUNDARY_NONE, bz = DM_BOUNDARY_NONE;
18: PetscInitialize(&argc, &argv, (char *)0, help);
19: PetscOptionsGetInt(NULL, NULL, "-dim", &dim, NULL);
20: PetscOptionsGetInt(NULL, NULL, "-M", &M1, NULL);
21: PetscOptionsGetInt(NULL, NULL, "-stencil_width", &s, NULL);
22: PetscOptionsGetInt(NULL, NULL, "-ratio", &ratio, NULL);
23: PetscOptionsGetInt(NULL, NULL, "-dof", &dof, NULL);
24: PetscOptionsGetBool(NULL, NULL, "-periodic", (PetscBool *)&pt, NULL);
26: if (pt) {
27: if (dim > 0) bx = DM_BOUNDARY_PERIODIC;
28: if (dim > 1) by = DM_BOUNDARY_PERIODIC;
29: if (dim > 2) bz = DM_BOUNDARY_PERIODIC;
30: }
31: if (bx == DM_BOUNDARY_NONE) {
32: M2 = ratio * (M1 - 1) + 1;
33: } else {
34: M2 = ratio * M1;
35: }
37: /* Set up the array */
38: if (dim == 1) {
39: DMDACreate1d(PETSC_COMM_WORLD, bx, M1, dof, s, NULL, &da_c);
40: DMDACreate1d(PETSC_COMM_WORLD, bx, M2, dof, s, NULL, &da_f);
41: } else if (dim == 2) {
42: DMDACreate2d(PETSC_COMM_WORLD, bx, by, DMDA_STENCIL_BOX, M1, M1, PETSC_DECIDE, PETSC_DECIDE, dof, s, NULL, NULL, &da_c);
43: DMDACreate2d(PETSC_COMM_WORLD, bx, by, DMDA_STENCIL_BOX, M2, M2, PETSC_DECIDE, PETSC_DECIDE, dof, s, NULL, NULL, &da_f);
44: } else if (dim == 3) {
45: 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);
46: 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);
47: } else SETERRQ(PETSC_COMM_WORLD, PETSC_ERR_SUP, "dim must be 1,2, or 3");
48: DMSetFromOptions(da_c);
49: DMSetUp(da_c);
50: DMSetFromOptions(da_f);
51: DMSetUp(da_f);
53: DMCreateGlobalVector(da_c, &v_c);
54: DMCreateGlobalVector(da_f, &v_f);
56: VecSet(v_c, one);
57: DMCreateInterpolation(da_c, da_f, &Interp, NULL);
58: MatMult(Interp, v_c, v_f);
59: VecView(v_f, PETSC_VIEWER_STDOUT_WORLD);
60: MatMultTranspose(Interp, v_f, v_c);
61: VecView(v_c, PETSC_VIEWER_STDOUT_WORLD);
63: MatDestroy(&Interp);
64: VecDestroy(&v_c);
65: DMDestroy(&da_c);
66: VecDestroy(&v_f);
67: DMDestroy(&da_f);
68: PetscFinalize();
69: return 0;
70: }