1 #include <petsc-private/dmpleximpl.h> /*I "petscdmplex.h" I*/ 2 #include <petsc-private/matorderimpl.h> /*I "petscmat.h" I*/ 3 4 #undef __FUNCT__ 5 #define __FUNCT__ "DMPlexCreateOrderingClosure_Static" 6 PetscErrorCode DMPlexCreateOrderingClosure_Static(DM dm, PetscInt numPoints, const PetscInt pperm[], PetscInt **clperm, PetscInt **invclperm) 7 { 8 PetscInt *perm, *iperm; 9 PetscInt depth, d, pStart, pEnd, fStart, fMax, fEnd, p; 10 PetscErrorCode ierr; 11 12 PetscFunctionBegin; 13 ierr = DMPlexGetDepth(dm, &depth);CHKERRQ(ierr); 14 ierr = DMPlexGetChart(dm, &pStart, &pEnd);CHKERRQ(ierr); 15 ierr = PetscMalloc((pEnd-pStart) * sizeof(PetscInt), &perm);CHKERRQ(ierr); 16 ierr = PetscMalloc((pEnd-pStart) * sizeof(PetscInt) ,&iperm);CHKERRQ(ierr); 17 for (p = pStart; p < pEnd; ++p) iperm[p] = -1; 18 for (d = depth; d > 0; --d) { 19 ierr = DMPlexGetDepthStratum(dm, d, &pStart, &pEnd);CHKERRQ(ierr); 20 ierr = DMPlexGetDepthStratum(dm, d-1, &fStart, &fEnd);CHKERRQ(ierr); 21 fMax = fStart; 22 for (p = pStart; p < pEnd; ++p) { 23 const PetscInt *cone; 24 PetscInt point, coneSize, c; 25 26 if (d == depth) { 27 perm[p] = pperm[p]; 28 iperm[pperm[p]] = p; 29 } 30 point = perm[p]; 31 ierr = DMPlexGetConeSize(dm, point, &coneSize);CHKERRQ(ierr); 32 ierr = DMPlexGetCone(dm, point, &cone);CHKERRQ(ierr); 33 for (c = 0; c < coneSize; ++c) { 34 const PetscInt oldc = cone[c]; 35 const PetscInt newc = iperm[oldc]; 36 37 if (newc < 0) { 38 perm[fMax] = oldc; 39 iperm[oldc] = fMax++; 40 } 41 } 42 } 43 if (fMax != fEnd) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Number of depth %d faces %d does not match permuted nubmer %d", d, fEnd-fStart, fMax-fStart); 44 } 45 *clperm = perm; 46 *invclperm = iperm; 47 PetscFunctionReturn(0); 48 } 49 50 #undef __FUNCT__ 51 #define __FUNCT__ "DMPlexGetOrdering" 52 /*@ 53 DMPlexGetOrdering - Calculate a reordering of the mesh 54 55 Collective on DM 56 57 Input Parameter: 58 + dm - The DMPlex object 59 - otype - type of reordering, one of the following: 60 $ MATORDERINGNATURAL - Natural 61 $ MATORDERINGND - Nested Dissection 62 $ MATORDERING1WD - One-way Dissection 63 $ MATORDERINGRCM - Reverse Cuthill-McKee 64 $ MATORDERINGQMD - Quotient Minimum Degree 65 66 67 Output Parameter: 68 . perm - The point permutation as an IS 69 70 Level: intermediate 71 72 .keywords: mesh 73 .seealso: MatGetOrdering() 74 @*/ 75 PetscErrorCode DMPlexGetOrdering(DM dm, MatOrderingType otype, IS *perm) 76 { 77 PetscInt numCells = 0; 78 PetscInt *start = NULL, *adjacency = NULL, *cperm, *clperm, *invclperm, *mask, *xls, pStart, pEnd, c, i; 79 PetscErrorCode ierr; 80 81 PetscFunctionBegin; 82 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 83 PetscValidPointer(perm, 3); 84 ierr = DMPlexCreateNeighborCSR(dm, 0, &numCells, &start, &adjacency);CHKERRQ(ierr); 85 ierr = PetscMalloc3(numCells,PetscInt,&cperm,numCells,PetscInt,&mask,numCells*2,PetscInt,&xls);CHKERRQ(ierr); 86 /* Shift for Fortran numbering */ 87 for (i = 0; i < start[numCells]; ++i) ++adjacency[i]; 88 for (i = 0; i <= numCells; ++i) ++start[i]; 89 ierr = SPARSEPACKgenrcm(&numCells, start, adjacency, cperm, mask, xls);CHKERRQ(ierr); 90 ierr = PetscFree(start);CHKERRQ(ierr); 91 ierr = PetscFree(adjacency);CHKERRQ(ierr); 92 /* Shift for Fortran numbering */ 93 for (c = 0; c < numCells; ++c) --cperm[c]; 94 /* Construct closure */ 95 ierr = DMPlexCreateOrderingClosure_Static(dm, numCells, cperm, &clperm, &invclperm); 96 ierr = PetscFree3(cperm,mask,xls);CHKERRQ(ierr); 97 ierr = PetscFree(clperm);CHKERRQ(ierr); 98 /* Invert permutation */ 99 ierr = DMPlexGetChart(dm, &pStart, &pEnd);CHKERRQ(ierr); 100 ierr = ISCreateGeneral(PetscObjectComm((PetscObject) dm), pEnd-pStart, invclperm, PETSC_OWN_POINTER, perm);CHKERRQ(ierr); 101 PetscFunctionReturn(0); 102 } 103 104 #undef __FUNCT__ 105 #define __FUNCT__ "DMPlexPermute" 106 /*@ 107 DMPlexPermute - Reorder the mesh according to the input permutation 108 109 Collective on DM 110 111 Input Parameter: 112 + dm - The DMPlex object 113 - perm - The point permutation 114 115 Output Parameter: 116 . pdm - The permuted DM 117 118 Level: intermediate 119 120 .keywords: mesh 121 .seealso: MatPermute() 122 @*/ 123 PetscErrorCode DMPlexPermute(DM dm, IS perm, DM *pdm) 124 { 125 DM_Plex *plex = (DM_Plex *) dm->data, *plexNew; 126 PetscSection section, sectionNew; 127 PetscInt dim; 128 PetscErrorCode ierr; 129 130 PetscFunctionBegin; 131 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 132 PetscValidHeaderSpecific(perm, IS_CLASSID, 2); 133 PetscValidPointer(pdm, 3); 134 ierr = DMCreate(PetscObjectComm((PetscObject) dm), pdm);CHKERRQ(ierr); 135 ierr = DMSetType(*pdm, DMPLEX);CHKERRQ(ierr); 136 ierr = DMPlexGetDimension(dm, &dim);CHKERRQ(ierr); 137 ierr = DMPlexSetDimension(*pdm, dim);CHKERRQ(ierr); 138 ierr = DMGetDefaultSection(dm, §ion);CHKERRQ(ierr); 139 if (section) { 140 ierr = PetscSectionPermute(section, perm, §ionNew);CHKERRQ(ierr); 141 ierr = DMSetDefaultSection(*pdm, sectionNew);CHKERRQ(ierr); 142 ierr = PetscSectionDestroy(§ionNew);CHKERRQ(ierr); 143 } 144 plexNew = (DM_Plex *) (*pdm)->data; 145 /* Ignore ltogmap, ltogmapb */ 146 /* Ignore sf, defaultSF */ 147 /* Ignore globalVertexNumbers, globalCellNumbers */ 148 /* Remap coordinates */ 149 { 150 DM cdm, cdmNew; 151 PetscSection csection, csectionNew; 152 Vec coordinates, coordinatesNew; 153 PetscScalar *coords, *coordsNew; 154 PetscInt pStart, pEnd, p; 155 156 ierr = DMGetCoordinateDM(dm, &cdm);CHKERRQ(ierr); 157 ierr = DMGetDefaultSection(cdm, &csection);CHKERRQ(ierr); 158 ierr = PetscSectionPermute(csection, perm, &csectionNew);CHKERRQ(ierr); 159 ierr = DMGetCoordinatesLocal(dm, &coordinates);CHKERRQ(ierr); 160 ierr = VecDuplicate(coordinates, &coordinatesNew);CHKERRQ(ierr); 161 ierr = VecGetArray(coordinates, &coords);CHKERRQ(ierr); 162 ierr = VecGetArray(coordinatesNew, &coordsNew);CHKERRQ(ierr); 163 ierr = PetscSectionGetChart(csectionNew, &pStart, &pEnd);CHKERRQ(ierr); 164 for (p = pStart; p < pEnd; ++p) { 165 PetscInt dof, off, offNew, d; 166 167 ierr = PetscSectionGetDof(csectionNew, p, &dof);CHKERRQ(ierr); 168 ierr = PetscSectionGetOffset(csection, p, &off);CHKERRQ(ierr); 169 ierr = PetscSectionGetOffset(csectionNew, p, &offNew);CHKERRQ(ierr); 170 for (d = 0; d < dof; ++d) coordsNew[offNew+d] = coords[off+d]; 171 } 172 ierr = VecRestoreArray(coordinates, &coords);CHKERRQ(ierr); 173 ierr = VecRestoreArray(coordinatesNew, &coordsNew);CHKERRQ(ierr); 174 ierr = DMGetCoordinateDM(*pdm, &cdmNew);CHKERRQ(ierr); 175 ierr = DMSetDefaultSection(cdmNew, csectionNew);CHKERRQ(ierr); 176 ierr = DMSetCoordinatesLocal(*pdm, coordinatesNew);CHKERRQ(ierr); 177 ierr = PetscSectionDestroy(&csectionNew);CHKERRQ(ierr); 178 ierr = VecDestroy(&coordinatesNew);CHKERRQ(ierr); 179 } 180 /* Reorder labels */ 181 { 182 DMLabel label = plex->labels, labelNew = NULL; 183 184 while (label) { 185 if (!plexNew->labels) { 186 ierr = DMLabelPermute(label, perm, &plexNew->labels);CHKERRQ(ierr); 187 labelNew = plexNew->labels; 188 } else { 189 ierr = DMLabelPermute(label, perm, &labelNew->next);CHKERRQ(ierr); 190 labelNew = labelNew->next; 191 } 192 label = label->next; 193 } 194 if (plex->subpointMap) {ierr = DMLabelPermute(plex->subpointMap, perm, &plexNew->subpointMap);CHKERRQ(ierr);} 195 } 196 /* Reorder topology */ 197 { 198 const PetscInt *pperm; 199 PetscInt maxConeSize, maxSupportSize, n, pStart, pEnd, p; 200 201 ierr = DMPlexGetMaxSizes(dm, &maxConeSize, &maxSupportSize);CHKERRQ(ierr); 202 plexNew->maxConeSize = maxConeSize; 203 plexNew->maxSupportSize = maxSupportSize; 204 ierr = PetscSectionDestroy(&plexNew->coneSection);CHKERRQ(ierr); 205 ierr = PetscSectionPermute(plex->coneSection, perm, &plexNew->coneSection);CHKERRQ(ierr); 206 ierr = PetscSectionGetStorageSize(plexNew->coneSection, &n);CHKERRQ(ierr); 207 ierr = PetscMalloc(n * sizeof(PetscInt), &plexNew->cones);CHKERRQ(ierr); 208 ierr = PetscMalloc(n * sizeof(PetscInt), &plexNew->coneOrientations);CHKERRQ(ierr); 209 ierr = ISGetIndices(perm, &pperm);CHKERRQ(ierr); 210 ierr = PetscSectionGetChart(plex->coneSection, &pStart, &pEnd);CHKERRQ(ierr); 211 for (p = pStart; p < pEnd; ++p) { 212 PetscInt dof, off, offNew, d; 213 214 ierr = PetscSectionGetDof(plexNew->coneSection, pperm[p], &dof);CHKERRQ(ierr); 215 ierr = PetscSectionGetOffset(plex->coneSection, p, &off);CHKERRQ(ierr); 216 ierr = PetscSectionGetOffset(plexNew->coneSection, pperm[p], &offNew);CHKERRQ(ierr); 217 for (d = 0; d < dof; ++d) { 218 plexNew->cones[offNew+d] = pperm[plex->cones[off+d]]; 219 plexNew->coneOrientations[offNew+d] = plex->coneOrientations[off+d]; 220 } 221 } 222 ierr = PetscSectionDestroy(&plexNew->supportSection);CHKERRQ(ierr); 223 ierr = PetscSectionPermute(plex->supportSection, perm, &plexNew->supportSection);CHKERRQ(ierr); 224 ierr = PetscSectionGetStorageSize(plexNew->supportSection, &n);CHKERRQ(ierr); 225 ierr = PetscMalloc(n * sizeof(PetscInt), &plexNew->supports);CHKERRQ(ierr); 226 ierr = PetscSectionGetChart(plex->supportSection, &pStart, &pEnd);CHKERRQ(ierr); 227 for (p = pStart; p < pEnd; ++p) { 228 PetscInt dof, off, offNew, d; 229 230 ierr = PetscSectionGetDof(plexNew->supportSection, pperm[p], &dof);CHKERRQ(ierr); 231 ierr = PetscSectionGetOffset(plex->supportSection, p, &off);CHKERRQ(ierr); 232 ierr = PetscSectionGetOffset(plexNew->supportSection, pperm[p], &offNew);CHKERRQ(ierr); 233 for (d = 0; d < dof; ++d) { 234 plexNew->supports[offNew+d] = pperm[plex->supports[off+d]]; 235 } 236 } 237 ierr = ISRestoreIndices(perm, &pperm);CHKERRQ(ierr); 238 } 239 PetscFunctionReturn(0); 240 } 241