1 2 static char help[] = "DMSwarm-PIC demonstator of inserting points into a cell DM \n\ 3 Options: \n\ 4 -mode {0,1} : 0 ==> DMDA, 1 ==> DMPLEX cell DM \n\ 5 -dim {2,3} : spatial dimension\n"; 6 7 #include <petsc.h> 8 #include <petscdm.h> 9 #include <petscdmda.h> 10 #include <petscdmplex.h> 11 #include <petscdmswarm.h> 12 13 PetscErrorCode pic_insert_DMDA(PetscInt dim) { 14 DM celldm = NULL, swarm; 15 PetscInt dof, stencil_width; 16 PetscReal min[3], max[3]; 17 PetscInt ndir[3]; 18 19 PetscFunctionBegin; 20 /* Create the background cell DM */ 21 dof = 1; 22 stencil_width = 1; 23 if (dim == 2) { PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_BOX, 25, 13, PETSC_DECIDE, PETSC_DECIDE, dof, stencil_width, NULL, NULL, &celldm)); } 24 if (dim == 3) { PetscCall(DMDACreate3d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_BOX, 25, 13, 19, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, dof, stencil_width, NULL, NULL, NULL, &celldm)); } 25 26 PetscCall(DMDASetElementType(celldm, DMDA_ELEMENT_Q1)); 27 PetscCall(DMSetFromOptions(celldm)); 28 PetscCall(DMSetUp(celldm)); 29 30 PetscCall(DMDASetUniformCoordinates(celldm, 0.0, 2.0, 0.0, 1.0, 0.0, 1.5)); 31 32 /* Create the DMSwarm */ 33 PetscCall(DMCreate(PETSC_COMM_WORLD, &swarm)); 34 PetscCall(PetscObjectSetName((PetscObject)swarm, "Swarm")); 35 PetscCall(DMSetType(swarm, DMSWARM)); 36 PetscCall(DMSetDimension(swarm, dim)); 37 38 /* Configure swarm to be of type PIC */ 39 PetscCall(DMSwarmSetType(swarm, DMSWARM_PIC)); 40 PetscCall(DMSwarmSetCellDM(swarm, celldm)); 41 42 /* Register two scalar fields within the DMSwarm */ 43 PetscCall(DMSwarmRegisterPetscDatatypeField(swarm, "viscosity", 1, PETSC_DOUBLE)); 44 PetscCall(DMSwarmRegisterPetscDatatypeField(swarm, "density", 1, PETSC_DOUBLE)); 45 PetscCall(DMSwarmFinalizeFieldRegister(swarm)); 46 47 /* Set initial local sizes of the DMSwarm with a buffer length of zero */ 48 PetscCall(DMSwarmSetLocalSizes(swarm, 4, 0)); 49 50 /* Insert swarm coordinates cell-wise */ 51 PetscCall(DMSwarmInsertPointsUsingCellDM(swarm, DMSWARMPIC_LAYOUT_REGULAR, 3)); 52 min[0] = 0.5; 53 max[0] = 0.7; 54 min[1] = 0.5; 55 max[1] = 0.8; 56 min[2] = 0.5; 57 max[2] = 0.9; 58 ndir[0] = ndir[1] = ndir[2] = 30; 59 PetscCall(DMSwarmSetPointsUniformCoordinates(swarm, min, max, ndir, ADD_VALUES)); 60 61 /* This should be dispatched from a regular DMView() */ 62 PetscCall(DMSwarmViewXDMF(swarm, "ex20.xmf")); 63 PetscCall(DMView(celldm, PETSC_VIEWER_STDOUT_WORLD)); 64 PetscCall(DMView(swarm, PETSC_VIEWER_STDOUT_WORLD)); 65 66 { 67 PetscInt npoints, *list; 68 PetscMPIInt rank; 69 70 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 71 PetscCall(DMSwarmSortGetAccess(swarm)); 72 PetscCall(DMSwarmSortGetNumberOfPointsPerCell(swarm, 0, &npoints)); 73 PetscCall(DMSwarmSortGetPointsPerCell(swarm, rank, &npoints, &list)); 74 PetscCall(PetscFree(list)); 75 PetscCall(DMSwarmSortRestoreAccess(swarm)); 76 } 77 PetscCall(DMSwarmMigrate(swarm, PETSC_FALSE)); 78 PetscCall(DMDestroy(&celldm)); 79 PetscCall(DMDestroy(&swarm)); 80 PetscFunctionReturn(0); 81 } 82 83 PetscErrorCode pic_insert_DMPLEX_with_cell_list(PetscInt dim) { 84 DM celldm = NULL, swarm, distributedMesh = NULL; 85 const char *fieldnames[] = {"viscosity"}; 86 87 PetscFunctionBegin; 88 /* Create the background cell DM */ 89 if (dim == 2) { 90 PetscInt cells_per_dim[2], nx[2]; 91 PetscInt n_tricells; 92 PetscInt n_trivert; 93 PetscInt *tricells; 94 PetscReal *trivert, dx, dy; 95 PetscInt ii, jj, cnt; 96 97 cells_per_dim[0] = 4; 98 cells_per_dim[1] = 4; 99 n_tricells = cells_per_dim[0] * cells_per_dim[1] * 2; 100 nx[0] = cells_per_dim[0] + 1; 101 nx[1] = cells_per_dim[1] + 1; 102 n_trivert = nx[0] * nx[1]; 103 104 PetscCall(PetscMalloc1(n_tricells * 3, &tricells)); 105 PetscCall(PetscMalloc1(nx[0] * nx[1] * 2, &trivert)); 106 107 /* verts */ 108 cnt = 0; 109 dx = 2.0 / ((PetscReal)cells_per_dim[0]); 110 dy = 1.0 / ((PetscReal)cells_per_dim[1]); 111 for (jj = 0; jj < nx[1]; jj++) { 112 for (ii = 0; ii < nx[0]; ii++) { 113 trivert[2 * cnt + 0] = 0.0 + ii * dx; 114 trivert[2 * cnt + 1] = 0.0 + jj * dy; 115 cnt++; 116 } 117 } 118 119 /* connectivity */ 120 cnt = 0; 121 for (jj = 0; jj < cells_per_dim[1]; jj++) { 122 for (ii = 0; ii < cells_per_dim[0]; ii++) { 123 PetscInt idx, idx0, idx1, idx2, idx3; 124 125 idx = (ii) + (jj)*nx[0]; 126 idx0 = idx; 127 idx1 = idx0 + 1; 128 idx2 = idx1 + nx[0]; 129 idx3 = idx0 + nx[0]; 130 131 tricells[3 * cnt + 0] = idx0; 132 tricells[3 * cnt + 1] = idx1; 133 tricells[3 * cnt + 2] = idx2; 134 cnt++; 135 136 tricells[3 * cnt + 0] = idx0; 137 tricells[3 * cnt + 1] = idx2; 138 tricells[3 * cnt + 2] = idx3; 139 cnt++; 140 } 141 } 142 PetscCall(DMPlexCreateFromCellListPetsc(PETSC_COMM_WORLD, dim, n_tricells, n_trivert, 3, PETSC_TRUE, tricells, dim, trivert, &celldm)); 143 PetscCall(PetscFree(trivert)); 144 PetscCall(PetscFree(tricells)); 145 } 146 PetscCheck(dim != 3, PETSC_COMM_WORLD, PETSC_ERR_SUP, "Only 2D PLEX example supported"); 147 148 /* Distribute mesh over processes */ 149 PetscCall(DMPlexDistribute(celldm, 0, NULL, &distributedMesh)); 150 if (distributedMesh) { 151 PetscCall(DMDestroy(&celldm)); 152 celldm = distributedMesh; 153 } 154 PetscCall(PetscObjectSetName((PetscObject)celldm, "Cells")); 155 PetscCall(DMSetFromOptions(celldm)); 156 { 157 PetscInt numComp[] = {1}; 158 PetscInt numDof[] = {1, 0, 0}; /* vert, edge, cell */ 159 PetscInt numBC = 0; 160 PetscSection section; 161 162 PetscCall(DMPlexCreateSection(celldm, NULL, numComp, numDof, numBC, NULL, NULL, NULL, NULL, §ion)); 163 PetscCall(DMSetLocalSection(celldm, section)); 164 PetscCall(PetscSectionDestroy(§ion)); 165 } 166 PetscCall(DMSetUp(celldm)); 167 { 168 PetscViewer viewer; 169 170 PetscCall(PetscViewerCreate(PETSC_COMM_WORLD, &viewer)); 171 PetscCall(PetscViewerSetType(viewer, PETSCVIEWERVTK)); 172 PetscCall(PetscViewerFileSetMode(viewer, FILE_MODE_WRITE)); 173 PetscCall(PetscViewerFileSetName(viewer, "ex20plex.vtk")); 174 PetscCall(DMView(celldm, viewer)); 175 PetscCall(PetscViewerDestroy(&viewer)); 176 } 177 178 /* Create the DMSwarm */ 179 PetscCall(DMCreate(PETSC_COMM_WORLD, &swarm)); 180 PetscCall(PetscObjectSetName((PetscObject)swarm, "Swarm")); 181 PetscCall(DMSetType(swarm, DMSWARM)); 182 PetscCall(DMSetDimension(swarm, dim)); 183 184 PetscCall(DMSwarmSetType(swarm, DMSWARM_PIC)); 185 PetscCall(DMSwarmSetCellDM(swarm, celldm)); 186 187 /* Register two scalar fields within the DMSwarm */ 188 PetscCall(DMSwarmRegisterPetscDatatypeField(swarm, "viscosity", 1, PETSC_DOUBLE)); 189 PetscCall(DMSwarmRegisterPetscDatatypeField(swarm, "density", 1, PETSC_DOUBLE)); 190 PetscCall(DMSwarmFinalizeFieldRegister(swarm)); 191 192 /* Set initial local sizes of the DMSwarm with a buffer length of zero */ 193 PetscCall(DMSwarmSetLocalSizes(swarm, 4, 0)); 194 195 /* Insert swarm coordinates cell-wise */ 196 PetscCall(DMSwarmInsertPointsUsingCellDM(swarm, DMSWARMPIC_LAYOUT_SUBDIVISION, 2)); 197 PetscCall(DMSwarmViewFieldsXDMF(swarm, "ex20.xmf", 1, fieldnames)); 198 PetscCall(DMView(celldm, PETSC_VIEWER_STDOUT_WORLD)); 199 PetscCall(DMView(swarm, PETSC_VIEWER_STDOUT_WORLD)); 200 PetscCall(DMDestroy(&celldm)); 201 PetscCall(DMDestroy(&swarm)); 202 PetscFunctionReturn(0); 203 } 204 205 PetscErrorCode pic_insert_DMPLEX(PetscBool is_simplex, PetscInt dim) { 206 DM celldm, swarm, distributedMesh = NULL; 207 const char *fieldnames[] = {"viscosity", "DMSwarm_rank"}; 208 209 PetscFunctionBegin; 210 211 /* Create the background cell DM */ 212 { 213 PetscInt faces[3] = {4, 2, 4}; 214 PetscCall(DMPlexCreateBoxMesh(PETSC_COMM_WORLD, dim, is_simplex, faces, NULL, NULL, NULL, PETSC_TRUE, &celldm)); 215 } 216 217 /* Distribute mesh over processes */ 218 PetscCall(DMPlexDistribute(celldm, 0, NULL, &distributedMesh)); 219 if (distributedMesh) { 220 PetscCall(DMDestroy(&celldm)); 221 celldm = distributedMesh; 222 } 223 PetscCall(PetscObjectSetName((PetscObject)celldm, "Cells")); 224 PetscCall(DMSetFromOptions(celldm)); 225 { 226 PetscInt numComp[] = {1}; 227 PetscInt numDof[] = {1, 0, 0}; /* vert, edge, cell */ 228 PetscInt numBC = 0; 229 PetscSection section; 230 231 PetscCall(DMPlexCreateSection(celldm, NULL, numComp, numDof, numBC, NULL, NULL, NULL, NULL, §ion)); 232 PetscCall(DMSetLocalSection(celldm, section)); 233 PetscCall(PetscSectionDestroy(§ion)); 234 } 235 PetscCall(DMSetUp(celldm)); 236 { 237 PetscViewer viewer; 238 239 PetscCall(PetscViewerCreate(PETSC_COMM_WORLD, &viewer)); 240 PetscCall(PetscViewerSetType(viewer, PETSCVIEWERVTK)); 241 PetscCall(PetscViewerFileSetMode(viewer, FILE_MODE_WRITE)); 242 PetscCall(PetscViewerFileSetName(viewer, "ex20plex.vtk")); 243 PetscCall(DMView(celldm, viewer)); 244 PetscCall(PetscViewerDestroy(&viewer)); 245 } 246 247 PetscCall(DMCreate(PETSC_COMM_WORLD, &swarm)); 248 PetscCall(PetscObjectSetName((PetscObject)swarm, "Swarm")); 249 PetscCall(DMSetType(swarm, DMSWARM)); 250 PetscCall(DMSetDimension(swarm, dim)); 251 252 PetscCall(DMSwarmSetType(swarm, DMSWARM_PIC)); 253 PetscCall(DMSwarmSetCellDM(swarm, celldm)); 254 255 /* Register two scalar fields within the DMSwarm */ 256 PetscCall(DMSwarmRegisterPetscDatatypeField(swarm, "viscosity", 1, PETSC_DOUBLE)); 257 PetscCall(DMSwarmRegisterPetscDatatypeField(swarm, "density", 1, PETSC_DOUBLE)); 258 PetscCall(DMSwarmFinalizeFieldRegister(swarm)); 259 260 /* Set initial local sizes of the DMSwarm with a buffer length of zero */ 261 PetscCall(DMSwarmSetLocalSizes(swarm, 4, 0)); 262 263 /* Insert swarm coordinates cell-wise */ 264 PetscCall(DMSwarmInsertPointsUsingCellDM(swarm, DMSWARMPIC_LAYOUT_GAUSS, 3)); 265 PetscCall(DMSwarmViewFieldsXDMF(swarm, "ex20.xmf", 2, fieldnames)); 266 PetscCall(DMView(celldm, PETSC_VIEWER_STDOUT_WORLD)); 267 PetscCall(DMView(swarm, PETSC_VIEWER_STDOUT_WORLD)); 268 PetscCall(DMDestroy(&celldm)); 269 PetscCall(DMDestroy(&swarm)); 270 PetscFunctionReturn(0); 271 } 272 273 int main(int argc, char **args) { 274 PetscInt mode = 0; 275 PetscInt dim = 2; 276 277 PetscFunctionBeginUser; 278 PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 279 PetscCall(PetscOptionsGetInt(NULL, NULL, "-mode", &mode, NULL)); 280 PetscCall(PetscOptionsGetInt(NULL, NULL, "-dim", &dim, NULL)); 281 switch (mode) { 282 case 0: PetscCall(pic_insert_DMDA(dim)); break; 283 case 1: 284 /* tri / tet */ 285 PetscCall(pic_insert_DMPLEX(PETSC_TRUE, dim)); 286 break; 287 case 2: 288 /* quad / hex */ 289 PetscCall(pic_insert_DMPLEX(PETSC_FALSE, dim)); 290 break; 291 default: PetscCall(pic_insert_DMDA(dim)); break; 292 } 293 PetscCall(PetscFinalize()); 294 return 0; 295 } 296 297 /*TEST 298 299 test: 300 args: 301 requires: !complex double 302 filter: grep -v atomic 303 filter_output: grep -v atomic 304 305 test: 306 suffix: 2 307 requires: triangle double !complex 308 args: -mode 1 309 filter: grep -v atomic 310 filter_output: grep -v atomic 311 312 TEST*/ 313