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 16 ", comp %" PetscInt_FMT ", dof %" PetscInt_FMT "\n",name, num_elem, elem_size, num_comp, num_dof)); 17 if (X) PetscCall(VecGetArrayRead(X, &x)); 18 for (PetscInt c=0; c<num_elem; c++) { 19 PetscCall(PetscIntView(elem_size, &elem_restr_offsets[c*elem_size], PETSC_VIEWER_STDOUT_SELF)); 20 if (x) { 21 for (PetscInt i=0; i<elem_size; i++) { 22 PetscCall(PetscScalarView(num_comp, &x[elem_restr_offsets[c*elem_size+i]], PETSC_VIEWER_STDERR_SELF)); 23 } 24 } 25 } 26 if (X) PetscCall(VecRestoreArrayRead(X, &x)); 27 PetscCall(PetscFree(elem_restr_offsets)); 28 PetscFunctionReturn(0); 29 } 30 31 int main(int argc, char **argv) 32 { 33 DM dm; 34 PetscSection section; 35 PetscFE fe; 36 PetscInt dim,c,cStart,cEnd; 37 PetscBool view_coord = PETSC_FALSE, tensor = PETSC_TRUE; 38 39 PetscCall(PetscInitialize(&argc,&argv,NULL,help)); 40 PetscOptionsBegin(PETSC_COMM_WORLD, NULL, "Tensor closure restrictions", "DMPLEX"); 41 PetscCall(PetscOptionsBool("-closure_tensor", "Apply DMPlexSetClosurePermutationTensor", "ex8.c", tensor, &tensor, NULL)); 42 PetscCall(PetscOptionsBool("-view_coord", "View coordinates of element closures", "ex8.c", view_coord, &view_coord, NULL)); 43 PetscOptionsEnd(); 44 45 PetscCall(DMCreate(PETSC_COMM_WORLD, &dm)); 46 PetscCall(DMSetType(dm, DMPLEX)); 47 PetscCall(DMSetFromOptions(dm)); 48 PetscCall(DMViewFromOptions(dm, NULL, "-dm_view")); 49 PetscCall(DMGetDimension(dm, &dim)); 50 51 PetscCall(PetscFECreateDefault(PETSC_COMM_SELF,dim,1,PETSC_FALSE,NULL,PETSC_DETERMINE,&fe)); 52 PetscCall(DMAddField(dm,NULL,(PetscObject)fe)); 53 PetscCall(DMCreateDS(dm)); 54 if (tensor) PetscCall(DMPlexSetClosurePermutationTensor(dm,PETSC_DETERMINE,NULL)); 55 PetscCall(DMGetLocalSection(dm,§ion)); 56 PetscCall(DMPlexGetHeightStratum(dm,0,&cStart,&cEnd)); 57 for (c=cStart; c<cEnd; c++) { 58 PetscInt numindices,*indices; 59 PetscCall(DMPlexGetClosureIndices(dm,section,section,c,PETSC_TRUE,&numindices,&indices,NULL,NULL)); 60 PetscCall(PetscPrintf(PETSC_COMM_SELF,"Element #%" PetscInt_FMT "\n",c-cStart)); 61 PetscCall(PetscIntView(numindices,indices,PETSC_VIEWER_STDOUT_SELF)); 62 PetscCall(DMPlexRestoreClosureIndices(dm,section,section,c,PETSC_TRUE,&numindices,&indices,NULL,NULL)); 63 } 64 if (view_coord) { 65 DM cdm; 66 Vec X; 67 PetscInt cdim; 68 PetscCall(DMGetCoordinateDM(dm,&cdm)); 69 PetscCall(PetscObjectSetName((PetscObject)cdm, "coords")); 70 if (tensor) PetscCall(DMPlexSetClosurePermutationTensor(cdm,PETSC_DETERMINE,NULL)); 71 PetscCall(DMGetCoordinatesLocal(dm, &X)); 72 PetscCall(DMGetCoordinateDim(dm, &cdim)); 73 for (c=cStart; c<cEnd; c++) { 74 PetscScalar *x = NULL; 75 PetscInt ndof; 76 PetscCall(DMPlexVecGetClosure(cdm, NULL, X, c, &ndof, &x)); 77 PetscCheck(ndof % cdim == 0, PETSC_COMM_SELF, PETSC_ERR_ARG_INCOMP, "ndof not divisible by cdim"); 78 PetscCall(PetscPrintf(PETSC_COMM_SELF,"Element #%" PetscInt_FMT " coordinates\n",c-cStart)); 79 for (PetscInt i=0; i<ndof; i+= cdim) { 80 PetscCall(PetscScalarView(cdim, &x[i], PETSC_VIEWER_STDOUT_SELF)); 81 } 82 PetscCall(DMPlexVecRestoreClosure(cdm, NULL, X, c, &ndof, &x)); 83 } 84 PetscCall(ViewOffsets(dm, NULL)); 85 PetscCall(ViewOffsets(cdm, X)); 86 } 87 PetscCall(PetscFEDestroy(&fe)); 88 PetscCall(DMDestroy(&dm)); 89 PetscCall(PetscFinalize()); 90 return 0; 91 } 92 93 /*TEST 94 95 test: 96 suffix: 1d_q2 97 args: -dm_plex_dim 1 -petscspace_degree 2 -dm_plex_simplex 0 -dm_plex_box_faces 2 98 test: 99 suffix: 2d_q1 100 args: -dm_plex_dim 2 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 2,2 101 test: 102 suffix: 2d_q2 103 args: -dm_plex_dim 2 -petscspace_degree 2 -dm_plex_simplex 0 -dm_plex_box_faces 2,2 104 test: 105 suffix: 2d_q3 106 args: -dm_plex_dim 2 -petscspace_degree 3 -dm_plex_simplex 0 -dm_plex_box_faces 1,1 107 test: 108 suffix: 3d_q1 109 args: -dm_plex_dim 3 -petscspace_degree 1 -dm_plex_simplex 0 -dm_plex_box_faces 1,1,1 110 test: 111 suffix: 1d_q1_periodic 112 requires: !complex 113 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 114 test: 115 suffix: 2d_q1_periodic 116 requires: !complex 117 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 118 test: 119 suffix: 3d_q1_periodic 120 requires: !complex 121 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 122 test: 123 suffix: 3d_q2_periodic # not actually periodic because only 2 cells 124 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 125 126 TEST*/ 127