1 static char help[] = "Element closure restrictions in tensor/lexicographic/spectral-element ordering using DMPlex\n\n"; 2 3 #include <petscdmplex.h> 4 5 static PetscErrorCode ViewOffsets(DM dm, Vec X) 6 { 7 PetscInt num_elem, elem_size, num_comp, num_dof; 8 PetscInt *elem_restr_offsets; 9 const PetscScalar *x = NULL; 10 const char *name; 11 12 PetscFunctionBegin; 13 PetscCall(PetscObjectGetName((PetscObject)dm, &name)); 14 PetscCall(DMPlexGetLocalOffsets(dm, NULL, 0, 0, 0, &num_elem, &elem_size, &num_comp, &num_dof, &elem_restr_offsets)); 15 PetscCall(PetscPrintf(PETSC_COMM_SELF, "DM %s offsets: num_elem %" PetscInt_FMT ", size %" PetscInt_FMT ", comp %" PetscInt_FMT ", dof %" PetscInt_FMT "\n", name, num_elem, elem_size, num_comp, num_dof)); 16 if (X) PetscCall(VecGetArrayRead(X, &x)); 17 for (PetscInt c = 0; c < num_elem; c++) { 18 PetscCall(PetscIntView(elem_size, &elem_restr_offsets[c * elem_size], PETSC_VIEWER_STDOUT_SELF)); 19 if (x) { 20 for (PetscInt i = 0; i < elem_size; i++) PetscCall(PetscScalarView(num_comp, &x[elem_restr_offsets[c * elem_size + i]], PETSC_VIEWER_STDERR_SELF)); 21 } 22 } 23 if (X) PetscCall(VecRestoreArrayRead(X, &x)); 24 PetscCall(PetscFree(elem_restr_offsets)); 25 PetscFunctionReturn(0); 26 } 27 28 int main(int argc, char **argv) 29 { 30 DM dm; 31 PetscSection section; 32 PetscFE fe; 33 PetscInt dim, c, cStart, cEnd; 34 PetscBool view_coord = PETSC_FALSE, tensor = PETSC_TRUE, project = PETSC_FALSE; 35 36 PetscFunctionBeginUser; 37 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 38 PetscOptionsBegin(PETSC_COMM_WORLD, NULL, "Tensor closure restrictions", "DMPLEX"); 39 PetscCall(PetscOptionsBool("-closure_tensor", "Apply DMPlexSetClosurePermutationTensor", "ex8.c", tensor, &tensor, NULL)); 40 PetscCall(PetscOptionsBool("-project_coordinates", "Call DMProjectCoordinates explicitly", "ex8.c", project, &project, NULL)); 41 PetscCall(PetscOptionsBool("-view_coord", "View coordinates of element closures", "ex8.c", view_coord, &view_coord, NULL)); 42 PetscOptionsEnd(); 43 44 PetscCall(DMCreate(PETSC_COMM_WORLD, &dm)); 45 PetscCall(DMSetType(dm, DMPLEX)); 46 PetscCall(DMSetFromOptions(dm)); 47 if (project) { 48 PetscFE fe_coords; 49 PetscInt cdim; 50 PetscCall(DMGetCoordinateDim(dm, &cdim)); 51 PetscCall(PetscFECreateLagrange(PETSC_COMM_SELF, cdim, cdim, PETSC_FALSE, 1, 1, &fe_coords)); 52 PetscCall(DMProjectCoordinates(dm, fe_coords)); 53 PetscCall(PetscFEDestroy(&fe_coords)); 54 } 55 PetscCall(DMViewFromOptions(dm, NULL, "-dm_view")); 56 PetscCall(DMGetDimension(dm, &dim)); 57 58 PetscCall(PetscFECreateDefault(PETSC_COMM_SELF, dim, 1, PETSC_FALSE, NULL, PETSC_DETERMINE, &fe)); 59 PetscCall(DMAddField(dm, NULL, (PetscObject)fe)); 60 PetscCall(DMCreateDS(dm)); 61 if (tensor) PetscCall(DMPlexSetClosurePermutationTensor(dm, PETSC_DETERMINE, NULL)); 62 PetscCall(DMGetLocalSection(dm, §ion)); 63 PetscCall(DMPlexGetHeightStratum(dm, 0, &cStart, &cEnd)); 64 for (c = cStart; c < cEnd; c++) { 65 PetscInt numindices, *indices; 66 PetscCall(DMPlexGetClosureIndices(dm, section, section, c, PETSC_TRUE, &numindices, &indices, NULL, NULL)); 67 PetscCall(PetscPrintf(PETSC_COMM_SELF, "Element #%" PetscInt_FMT "\n", c - cStart)); 68 PetscCall(PetscIntView(numindices, indices, PETSC_VIEWER_STDOUT_SELF)); 69 PetscCall(DMPlexRestoreClosureIndices(dm, section, section, c, PETSC_TRUE, &numindices, &indices, NULL, NULL)); 70 } 71 if (view_coord) { 72 DM cdm; 73 Vec X; 74 PetscInt cdim; 75 76 PetscCall(DMGetCoordinateDim(dm, &cdim)); 77 PetscCall(DMGetCoordinateDM(dm, &cdm)); 78 PetscCall(PetscObjectSetName((PetscObject)cdm, "coords")); 79 if (tensor) PetscCall(DMPlexSetClosurePermutationTensor(cdm, PETSC_DETERMINE, NULL)); 80 for (c = cStart; c < cEnd; ++c) { 81 const PetscScalar *array; 82 PetscScalar *x = NULL; 83 PetscInt ndof; 84 PetscBool isDG; 85 86 PetscCall(DMPlexGetCellCoordinates(dm, c, &isDG, &ndof, &array, &x)); 87 PetscCheck(ndof % cdim == 0, PETSC_COMM_SELF, PETSC_ERR_ARG_INCOMP, "ndof not divisible by cdim"); 88 PetscCall(PetscPrintf(PETSC_COMM_SELF, "Element #%" PetscInt_FMT " coordinates\n", c - cStart)); 89 for (PetscInt i = 0; i < ndof; i += cdim) PetscCall(PetscScalarView(cdim, &x[i], PETSC_VIEWER_STDOUT_SELF)); 90 PetscCall(DMPlexRestoreCellCoordinates(dm, c, &isDG, &ndof, &array, &x)); 91 } 92 PetscCall(ViewOffsets(dm, NULL)); 93 PetscCall(DMGetCoordinatesLocal(dm, &X)); 94 PetscCall(ViewOffsets(cdm, X)); 95 } 96 PetscCall(PetscFEDestroy(&fe)); 97 PetscCall(DMDestroy(&dm)); 98 PetscCall(PetscFinalize()); 99 return 0; 100 } 101 102 /*TEST 103 104 test: 105 suffix: 1d_q2 106 args: -dm_plex_dim 1 -petscspace_degree 2 -dm_plex_simplex 0 -dm_plex_box_faces 2 107 test: 108 suffix: 2d_q1 109 args: -dm_plex_dim 2 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 2,2 110 test: 111 suffix: 2d_q2 112 args: -dm_plex_dim 2 -petscspace_degree 2 -dm_plex_simplex 0 -dm_plex_box_faces 2,2 113 test: 114 suffix: 2d_q3 115 args: -dm_plex_dim 2 -petscspace_degree 3 -dm_plex_simplex 0 -dm_plex_box_faces 1,1 116 test: 117 suffix: 3d_q1 118 args: -dm_plex_dim 3 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 1,1,1 119 test: 120 suffix: 1d_q1_periodic 121 requires: !complex 122 args: -dm_plex_dim 1 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 3 -dm_plex_box_bd periodic -dm_view -view_coord 123 test: 124 suffix: 2d_q1_periodic 125 requires: !complex 126 args: -dm_plex_dim 2 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 3,2 -dm_plex_box_bd periodic,none -dm_view -view_coord 127 test: 128 suffix: 3d_q1_periodic 129 requires: !complex 130 args: -dm_plex_dim 3 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 3,2,1 -dm_plex_box_bd periodic,none,none -dm_view -view_coord 131 test: 132 suffix: 3d_q1_periodic_project 133 requires: !complex 134 args: -dm_plex_dim 3 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 1,1,3 -dm_plex_box_bd none,none,periodic -dm_view -view_coord -project_coordinates 135 136 test: 137 suffix: 3d_q2_periodic # not actually periodic because only 2 cells 138 args: -dm_plex_dim 3 -petscspace_degree 2 -dm_plex_simplex 0 -dm_plex_box_faces 2,2,2 -dm_plex_box_bd periodic,none,periodic -dm_view 139 140 TEST*/ 141