1 static char help[] = "Tests DMDA interpolation.\n\n"; 2 3 #include <petscdm.h> 4 #include <petscdmda.h> 5 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, (char *)0, 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