Actual source code: plexsubmesh.c

petsc-3.13.2 2020-06-02
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  1:  #include <petsc/private/dmpleximpl.h>
  2:  #include <petsc/private/dmlabelimpl.h>
  3:  #include <petscsf.h>

  5: static PetscErrorCode DMPlexCellIsHybrid_Internal(DM dm, PetscInt p, PetscBool *isHybrid)
  6: {
  7:   DMPolytopeType ct;

 11:   DMPlexGetCellType(dm, p, &ct);
 12:   switch (ct) {
 13:     case DM_POLYTOPE_POINT_PRISM_TENSOR:
 14:     case DM_POLYTOPE_SEG_PRISM_TENSOR:
 15:     case DM_POLYTOPE_TRI_PRISM_TENSOR:
 16:     case DM_POLYTOPE_QUAD_PRISM_TENSOR:
 17:       *isHybrid = PETSC_TRUE;
 18:     default: *isHybrid = PETSC_FALSE;
 19:   }
 20:   return(0);
 21: }

 23: static PetscErrorCode DMPlexGetTensorPrismBounds_Internal(DM dm, PetscInt dim, PetscInt *cStart, PetscInt *cEnd)
 24: {
 25:   DMLabel        ctLabel;

 29:   if (cStart) *cStart = -1;
 30:   if (cEnd)   *cEnd   = -1;
 31:   DMPlexGetCellTypeLabel(dm, &ctLabel);
 32:   switch (dim) {
 33:     case 1: DMLabelGetStratumBounds(ctLabel, DM_POLYTOPE_POINT_PRISM_TENSOR, cStart, cEnd);break;
 34:     case 2: DMLabelGetStratumBounds(ctLabel, DM_POLYTOPE_SEG_PRISM_TENSOR, cStart, cEnd);break;
 35:     case 3:
 36:       DMLabelGetStratumBounds(ctLabel, DM_POLYTOPE_TRI_PRISM_TENSOR, cStart, cEnd);
 37:       if (*cStart < 0) {DMLabelGetStratumBounds(ctLabel, DM_POLYTOPE_QUAD_PRISM_TENSOR, cStart, cEnd);}
 38:       break;
 39:     default: return(0);
 40:   }
 41:   return(0);
 42: }

 44: static PetscErrorCode DMPlexMarkBoundaryFaces_Internal(DM dm, PetscInt val, PetscInt cellHeight, DMLabel label)
 45: {
 46:   PetscInt       fStart, fEnd, f;

 50:   DMPlexGetHeightStratum(dm, cellHeight+1, &fStart, &fEnd);
 51:   for (f = fStart; f < fEnd; ++f) {
 52:     PetscInt supportSize;

 54:     DMPlexGetSupportSize(dm, f, &supportSize);
 55:     if (supportSize == 1) {
 56:       if (val < 0) {
 57:         PetscInt *closure = NULL;
 58:         PetscInt  clSize, cl, cval;

 60:         DMPlexGetTransitiveClosure(dm, f, PETSC_TRUE, &clSize, &closure);
 61:         for (cl = 0; cl < clSize*2; cl += 2) {
 62:           DMLabelGetValue(label, closure[cl], &cval);
 63:           if (cval < 0) continue;
 64:           DMLabelSetValue(label, f, cval);
 65:           break;
 66:         }
 67:         if (cl == clSize*2) {DMLabelSetValue(label, f, 1);}
 68:         DMPlexRestoreTransitiveClosure(dm, f, PETSC_TRUE, &clSize, &closure);
 69:       } else {
 70:         DMLabelSetValue(label, f, val);
 71:       }
 72:     }
 73:   }
 74:   return(0);
 75: }

 77: /*@
 78:   DMPlexMarkBoundaryFaces - Mark all faces on the boundary

 80:   Not Collective

 82:   Input Parameter:
 83: + dm - The original DM
 84: - val - The marker value, or PETSC_DETERMINE to use some value in the closure (or 1 if none are found)

 86:   Output Parameter:
 87: . label - The DMLabel marking boundary faces with the given value

 89:   Level: developer

 91: .seealso: DMLabelCreate(), DMCreateLabel()
 92: @*/
 93: PetscErrorCode DMPlexMarkBoundaryFaces(DM dm, PetscInt val, DMLabel label)
 94: {
 95:   DMPlexInterpolatedFlag  flg;
 96:   PetscErrorCode          ierr;

100:   DMPlexIsInterpolated(dm, &flg);
101:   if (flg != DMPLEX_INTERPOLATED_FULL) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "DM is not fully interpolated on this rank");
102:   DMPlexMarkBoundaryFaces_Internal(dm, val, 0, label);
103:   return(0);
104: }

106: static PetscErrorCode DMPlexLabelComplete_Internal(DM dm, DMLabel label, PetscBool completeCells)
107: {
108:   IS              valueIS;
109:   PetscSF         sfPoint;
110:   const PetscInt *values;
111:   PetscInt        numValues, v, cStart, cEnd, nroots;
112:   PetscErrorCode  ierr;

115:   DMLabelGetNumValues(label, &numValues);
116:   DMLabelGetValueIS(label, &valueIS);
117:   DMPlexGetHeightStratum(dm,0,&cStart,&cEnd);
118:   ISGetIndices(valueIS, &values);
119:   for (v = 0; v < numValues; ++v) {
120:     IS              pointIS;
121:     const PetscInt *points;
122:     PetscInt        numPoints, p;

124:     DMLabelGetStratumSize(label, values[v], &numPoints);
125:     DMLabelGetStratumIS(label, values[v], &pointIS);
126:     ISGetIndices(pointIS, &points);
127:     for (p = 0; p < numPoints; ++p) {
128:       PetscInt  q = points[p];
129:       PetscInt *closure = NULL;
130:       PetscInt  closureSize, c;

132:       if (cStart <= q && q < cEnd && !completeCells) { /* skip cells */
133:         continue;
134:       }
135:       DMPlexGetTransitiveClosure(dm, q, PETSC_TRUE, &closureSize, &closure);
136:       for (c = 0; c < closureSize*2; c += 2) {
137:         DMLabelSetValue(label, closure[c], values[v]);
138:       }
139:       DMPlexRestoreTransitiveClosure(dm, q, PETSC_TRUE, &closureSize, &closure);
140:     }
141:     ISRestoreIndices(pointIS, &points);
142:     ISDestroy(&pointIS);
143:   }
144:   ISRestoreIndices(valueIS, &values);
145:   ISDestroy(&valueIS);
146:   DMGetPointSF(dm, &sfPoint);
147:   PetscSFGetGraph(sfPoint, &nroots, NULL, NULL, NULL);
148:   if (nroots >= 0) {
149:     DMLabel         lblRoots, lblLeaves;
150:     IS              valueIS, pointIS;
151:     const PetscInt *values;
152:     PetscInt        numValues, v;
153:     PetscErrorCode  ierr;

155:     /* Pull point contributions from remote leaves into local roots */
156:     DMLabelGather(label, sfPoint, &lblLeaves);
157:     DMLabelGetValueIS(lblLeaves, &valueIS);
158:     ISGetLocalSize(valueIS, &numValues);
159:     ISGetIndices(valueIS, &values);
160:     for (v = 0; v < numValues; ++v) {
161:       const PetscInt value = values[v];

163:       DMLabelGetStratumIS(lblLeaves, value, &pointIS);
164:       DMLabelInsertIS(label, pointIS, value);
165:       ISDestroy(&pointIS);
166:     }
167:     ISRestoreIndices(valueIS, &values);
168:     ISDestroy(&valueIS);
169:     DMLabelDestroy(&lblLeaves);
170:     /* Push point contributions from roots into remote leaves */
171:     DMLabelDistribute(label, sfPoint, &lblRoots);
172:     DMLabelGetValueIS(lblRoots, &valueIS);
173:     ISGetLocalSize(valueIS, &numValues);
174:     ISGetIndices(valueIS, &values);
175:     for (v = 0; v < numValues; ++v) {
176:       const PetscInt value = values[v];

178:       DMLabelGetStratumIS(lblRoots, value, &pointIS);
179:       DMLabelInsertIS(label, pointIS, value);
180:       ISDestroy(&pointIS);
181:     }
182:     ISRestoreIndices(valueIS, &values);
183:     ISDestroy(&valueIS);
184:     DMLabelDestroy(&lblRoots);
185:   }
186:   return(0);
187: }

189: /*@
190:   DMPlexLabelComplete - Starting with a label marking points on a surface, we add the transitive closure to the surface

192:   Input Parameters:
193: + dm - The DM
194: - label - A DMLabel marking the surface points

196:   Output Parameter:
197: . label - A DMLabel marking all surface points in the transitive closure

199:   Level: developer

201: .seealso: DMPlexLabelCohesiveComplete()
202: @*/
203: PetscErrorCode DMPlexLabelComplete(DM dm, DMLabel label)
204: {

208:   DMPlexLabelComplete_Internal(dm, label, PETSC_TRUE);
209:   return(0);
210: }

212: /*@
213:   DMPlexLabelAddCells - Starting with a label marking points on a surface, we add a cell for each point

215:   Input Parameters:
216: + dm - The DM
217: - label - A DMLabel marking the surface points

219:   Output Parameter:
220: . label - A DMLabel incorporating cells

222:   Level: developer

224:   Note: The cells allow FEM boundary conditions to be applied using the cell geometry

226: .seealso: DMPlexLabelAddFaceCells(), DMPlexLabelComplete(), DMPlexLabelCohesiveComplete()
227: @*/
228: PetscErrorCode DMPlexLabelAddCells(DM dm, DMLabel label)
229: {
230:   IS              valueIS;
231:   const PetscInt *values;
232:   PetscInt        numValues, v, cStart, cEnd;
233:   PetscErrorCode  ierr;

236:   DMPlexGetSimplexOrBoxCells(dm, 0, &cStart, &cEnd);
237:   DMLabelGetNumValues(label, &numValues);
238:   DMLabelGetValueIS(label, &valueIS);
239:   ISGetIndices(valueIS, &values);
240:   for (v = 0; v < numValues; ++v) {
241:     IS              pointIS;
242:     const PetscInt *points;
243:     PetscInt        numPoints, p;

245:     DMLabelGetStratumSize(label, values[v], &numPoints);
246:     DMLabelGetStratumIS(label, values[v], &pointIS);
247:     ISGetIndices(pointIS, &points);
248:     for (p = 0; p < numPoints; ++p) {
249:       PetscInt *closure = NULL;
250:       PetscInt  closureSize, cl;

252:       DMPlexGetTransitiveClosure(dm, points[p], PETSC_FALSE, &closureSize, &closure);
253:       for (cl = closureSize-1; cl > 0; --cl) {
254:         const PetscInt cell = closure[cl*2];
255:         if ((cell >= cStart) && (cell < cEnd)) {DMLabelSetValue(label, cell, values[v]); break;}
256:       }
257:       DMPlexRestoreTransitiveClosure(dm, points[p], PETSC_FALSE, &closureSize, &closure);
258:     }
259:     ISRestoreIndices(pointIS, &points);
260:     ISDestroy(&pointIS);
261:   }
262:   ISRestoreIndices(valueIS, &values);
263:   ISDestroy(&valueIS);
264:   return(0);
265: }

267: /*@
268:   DMPlexLabelAddFaceCells - Starting with a label marking faces on a surface, we add a cell for each face

270:   Input Parameters:
271: + dm - The DM
272: - label - A DMLabel marking the surface points

274:   Output Parameter:
275: . label - A DMLabel incorporating cells

277:   Level: developer

279:   Note: The cells allow FEM boundary conditions to be applied using the cell geometry

281: .seealso: DMPlexLabelAddCells(), DMPlexLabelComplete(), DMPlexLabelCohesiveComplete()
282: @*/
283: PetscErrorCode DMPlexLabelAddFaceCells(DM dm, DMLabel label)
284: {
285:   IS              valueIS;
286:   const PetscInt *values;
287:   PetscInt        numValues, v, cStart, cEnd, fStart, fEnd;
288:   PetscErrorCode  ierr;

291:   DMPlexGetSimplexOrBoxCells(dm, 0, &cStart, &cEnd);
292:   DMPlexGetHeightStratum(dm, 1, &fStart, &fEnd);
293:   DMLabelGetNumValues(label, &numValues);
294:   DMLabelGetValueIS(label, &valueIS);
295:   ISGetIndices(valueIS, &values);
296:   for (v = 0; v < numValues; ++v) {
297:     IS              pointIS;
298:     const PetscInt *points;
299:     PetscInt        numPoints, p;

301:     DMLabelGetStratumSize(label, values[v], &numPoints);
302:     DMLabelGetStratumIS(label, values[v], &pointIS);
303:     ISGetIndices(pointIS, &points);
304:     for (p = 0; p < numPoints; ++p) {
305:       const PetscInt face = points[p];
306:       PetscInt      *closure = NULL;
307:       PetscInt       closureSize, cl;

309:       if ((face < fStart) || (face >= fEnd)) continue;
310:       DMPlexGetTransitiveClosure(dm, face, PETSC_FALSE, &closureSize, &closure);
311:       for (cl = closureSize-1; cl > 0; --cl) {
312:         const PetscInt cell = closure[cl*2];
313:         if ((cell >= cStart) && (cell < cEnd)) {DMLabelSetValue(label, cell, values[v]); break;}
314:       }
315:       DMPlexRestoreTransitiveClosure(dm, face, PETSC_FALSE, &closureSize, &closure);
316:     }
317:     ISRestoreIndices(pointIS, &points);
318:     ISDestroy(&pointIS);
319:   }
320:   ISRestoreIndices(valueIS, &values);
321:   ISDestroy(&valueIS);
322:   return(0);
323: }

325: /*@
326:   DMPlexLabelClearCells - Remove cells from a label

328:   Input Parameters:
329: + dm - The DM
330: - label - A DMLabel marking surface points and their adjacent cells

332:   Output Parameter:
333: . label - A DMLabel without cells

335:   Level: developer

337:   Note: This undoes DMPlexLabelAddCells() or DMPlexLabelAddFaceCells()

339: .seealso: DMPlexLabelComplete(), DMPlexLabelCohesiveComplete(), DMPlexLabelAddCells()
340: @*/
341: PetscErrorCode DMPlexLabelClearCells(DM dm, DMLabel label)
342: {
343:   IS              valueIS;
344:   const PetscInt *values;
345:   PetscInt        numValues, v, cStart, cEnd;
346:   PetscErrorCode  ierr;

349:   DMPlexGetSimplexOrBoxCells(dm, 0, &cStart, &cEnd);
350:   DMLabelGetNumValues(label, &numValues);
351:   DMLabelGetValueIS(label, &valueIS);
352:   ISGetIndices(valueIS, &values);
353:   for (v = 0; v < numValues; ++v) {
354:     IS              pointIS;
355:     const PetscInt *points;
356:     PetscInt        numPoints, p;

358:     DMLabelGetStratumSize(label, values[v], &numPoints);
359:     DMLabelGetStratumIS(label, values[v], &pointIS);
360:     ISGetIndices(pointIS, &points);
361:     for (p = 0; p < numPoints; ++p) {
362:       PetscInt point = points[p];

364:       if (point >= cStart && point < cEnd) {
365:         DMLabelClearValue(label,point,values[v]);
366:       }
367:     }
368:     ISRestoreIndices(pointIS, &points);
369:     ISDestroy(&pointIS);
370:   }
371:   ISRestoreIndices(valueIS, &values);
372:   ISDestroy(&valueIS);
373:   return(0);
374: }

376: /* take (oldEnd, added) pairs, ordered by height and convert them to (oldstart, newstart) pairs, ordered by ascending
377:  * index (skipping first, which is (0,0)) */
378: PETSC_STATIC_INLINE PetscErrorCode DMPlexShiftPointSetUp_Internal(PetscInt depth, PetscInt depthShift[])
379: {
380:   PetscInt d, off = 0;

383:   /* sort by (oldend): yes this is an O(n^2) sort, we expect depth <= 3 */
384:   for (d = 0; d < depth; d++) {
385:     PetscInt firstd = d;
386:     PetscInt firstStart = depthShift[2*d];
387:     PetscInt e;

389:     for (e = d+1; e <= depth; e++) {
390:       if (depthShift[2*e] < firstStart) {
391:         firstd = e;
392:         firstStart = depthShift[2*d];
393:       }
394:     }
395:     if (firstd != d) {
396:       PetscInt swap[2];

398:       e = firstd;
399:       swap[0] = depthShift[2*d];
400:       swap[1] = depthShift[2*d+1];
401:       depthShift[2*d]   = depthShift[2*e];
402:       depthShift[2*d+1] = depthShift[2*e+1];
403:       depthShift[2*e]   = swap[0];
404:       depthShift[2*e+1] = swap[1];
405:     }
406:   }
407:   /* convert (oldstart, added) to (oldstart, newstart) */
408:   for (d = 0; d <= depth; d++) {
409:     off += depthShift[2*d+1];
410:     depthShift[2*d+1] = depthShift[2*d] + off;
411:   }
412:   return(0);
413: }

415: /* depthShift is a list of (old, new) pairs */
416: PETSC_STATIC_INLINE PetscInt DMPlexShiftPoint_Internal(PetscInt p, PetscInt depth, PetscInt depthShift[])
417: {
418:   PetscInt d;
419:   PetscInt newOff = 0;

421:   for (d = 0; d <= depth; d++) {
422:     if (p < depthShift[2*d]) return p + newOff;
423:     else newOff = depthShift[2*d+1] - depthShift[2*d];
424:   }
425:   return p + newOff;
426: }

428: /* depthShift is a list of (old, new) pairs */
429: PETSC_STATIC_INLINE PetscInt DMPlexShiftPointInverse_Internal(PetscInt p, PetscInt depth, PetscInt depthShift[])
430: {
431:   PetscInt d;
432:   PetscInt newOff = 0;

434:   for (d = 0; d <= depth; d++) {
435:     if (p < depthShift[2*d+1]) return p + newOff;
436:     else newOff = depthShift[2*d] - depthShift[2*d+1];
437:   }
438:   return p + newOff;
439: }

441: static PetscErrorCode DMPlexShiftSizes_Internal(DM dm, PetscInt depthShift[], DM dmNew)
442: {
443:   PetscInt       depth = 0, d, pStart, pEnd, p;
444:   DMLabel        depthLabel;

448:   DMPlexGetDepth(dm, &depth);
449:   if (depth < 0) return(0);
450:   /* Step 1: Expand chart */
451:   DMPlexGetChart(dm, &pStart, &pEnd);
452:   pEnd = DMPlexShiftPoint_Internal(pEnd,depth,depthShift);
453:   DMPlexSetChart(dmNew, pStart, pEnd);
454:   DMCreateLabel(dmNew,"depth");
455:   DMPlexGetDepthLabel(dmNew,&depthLabel);
456:   DMCreateLabel(dmNew, "celltype");
457:   /* Step 2: Set cone and support sizes */
458:   for (d = 0; d <= depth; ++d) {
459:     PetscInt pStartNew, pEndNew;
460:     IS pIS;

462:     DMPlexGetDepthStratum(dm, d, &pStart, &pEnd);
463:     pStartNew = DMPlexShiftPoint_Internal(pStart, depth, depthShift);
464:     pEndNew = DMPlexShiftPoint_Internal(pEnd, depth, depthShift);
465:     ISCreateStride(PETSC_COMM_SELF, pEndNew - pStartNew, pStartNew, 1, &pIS);
466:     DMLabelSetStratumIS(depthLabel, d, pIS);
467:     ISDestroy(&pIS);
468:     for (p = pStart; p < pEnd; ++p) {
469:       PetscInt       newp = DMPlexShiftPoint_Internal(p, depth, depthShift);
470:       PetscInt       size;
471:       DMPolytopeType ct;

473:       DMPlexGetConeSize(dm, p, &size);
474:       DMPlexSetConeSize(dmNew, newp, size);
475:       DMPlexGetSupportSize(dm, p, &size);
476:       DMPlexSetSupportSize(dmNew, newp, size);
477:       DMPlexGetCellType(dm, p, &ct);
478:       DMPlexSetCellType(dmNew, newp, ct);
479:     }
480:   }
481:   return(0);
482: }

484: static PetscErrorCode DMPlexShiftPoints_Internal(DM dm, PetscInt depthShift[], DM dmNew)
485: {
486:   PetscInt      *newpoints;
487:   PetscInt       depth = 0, maxConeSize, maxSupportSize, maxConeSizeNew, maxSupportSizeNew, pStart, pEnd, p;

491:   DMPlexGetDepth(dm, &depth);
492:   if (depth < 0) return(0);
493:   DMPlexGetMaxSizes(dm, &maxConeSize, &maxSupportSize);
494:   DMPlexGetMaxSizes(dmNew, &maxConeSizeNew, &maxSupportSizeNew);
495:   PetscMalloc1(PetscMax(PetscMax(maxConeSize, maxSupportSize), PetscMax(maxConeSizeNew, maxSupportSizeNew)),&newpoints);
496:   /* Step 5: Set cones and supports */
497:   DMPlexGetChart(dm, &pStart, &pEnd);
498:   for (p = pStart; p < pEnd; ++p) {
499:     const PetscInt *points = NULL, *orientations = NULL;
500:     PetscInt        size,sizeNew, i, newp = DMPlexShiftPoint_Internal(p, depth, depthShift);

502:     DMPlexGetConeSize(dm, p, &size);
503:     DMPlexGetCone(dm, p, &points);
504:     DMPlexGetConeOrientation(dm, p, &orientations);
505:     for (i = 0; i < size; ++i) {
506:       newpoints[i] = DMPlexShiftPoint_Internal(points[i], depth, depthShift);
507:     }
508:     DMPlexSetCone(dmNew, newp, newpoints);
509:     DMPlexSetConeOrientation(dmNew, newp, orientations);
510:     DMPlexGetSupportSize(dm, p, &size);
511:     DMPlexGetSupportSize(dmNew, newp, &sizeNew);
512:     DMPlexGetSupport(dm, p, &points);
513:     for (i = 0; i < size; ++i) {
514:       newpoints[i] = DMPlexShiftPoint_Internal(points[i], depth, depthShift);
515:     }
516:     for (i = size; i < sizeNew; ++i) newpoints[i] = 0;
517:     DMPlexSetSupport(dmNew, newp, newpoints);
518:   }
519:   PetscFree(newpoints);
520:   return(0);
521: }

523: static PetscErrorCode DMPlexShiftCoordinates_Internal(DM dm, PetscInt depthShift[], DM dmNew)
524: {
525:   PetscSection   coordSection, newCoordSection;
526:   Vec            coordinates, newCoordinates;
527:   PetscScalar   *coords, *newCoords;
528:   PetscInt       coordSize, sStart, sEnd;
529:   PetscInt       dim, depth = 0, cStart, cEnd, cStartNew, cEndNew, c, vStart, vEnd, vStartNew, vEndNew, v;
530:   PetscBool      hasCells;

534:   DMGetCoordinateDim(dm, &dim);
535:   DMSetCoordinateDim(dmNew, dim);
536:   DMPlexGetDepth(dm, &depth);
537:   /* Step 8: Convert coordinates */
538:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
539:   DMPlexGetHeightStratum(dm, 0, &cStart, &cEnd);
540:   DMPlexGetDepthStratum(dmNew, 0, &vStartNew, &vEndNew);
541:   DMPlexGetHeightStratum(dmNew, 0, &cStartNew, &cEndNew);
542:   DMGetCoordinateSection(dm, &coordSection);
543:   PetscSectionCreate(PetscObjectComm((PetscObject)dm), &newCoordSection);
544:   PetscSectionSetNumFields(newCoordSection, 1);
545:   PetscSectionSetFieldComponents(newCoordSection, 0, dim);
546:   PetscSectionGetChart(coordSection, &sStart, &sEnd);
547:   hasCells = sStart == cStart ? PETSC_TRUE : PETSC_FALSE;
548:   PetscSectionSetChart(newCoordSection, hasCells ? cStartNew : vStartNew, vEndNew);
549:   if (hasCells) {
550:     for (c = cStart; c < cEnd; ++c) {
551:       PetscInt cNew = DMPlexShiftPoint_Internal(c, depth, depthShift), dof;

553:       PetscSectionGetDof(coordSection, c, &dof);
554:       PetscSectionSetDof(newCoordSection, cNew, dof);
555:       PetscSectionSetFieldDof(newCoordSection, cNew, 0, dof);
556:     }
557:   }
558:   for (v = vStartNew; v < vEndNew; ++v) {
559:     PetscSectionSetDof(newCoordSection, v, dim);
560:     PetscSectionSetFieldDof(newCoordSection, v, 0, dim);
561:   }
562:   PetscSectionSetUp(newCoordSection);
563:   DMSetCoordinateSection(dmNew, PETSC_DETERMINE, newCoordSection);
564:   PetscSectionGetStorageSize(newCoordSection, &coordSize);
565:   VecCreate(PETSC_COMM_SELF, &newCoordinates);
566:   PetscObjectSetName((PetscObject) newCoordinates, "coordinates");
567:   VecSetSizes(newCoordinates, coordSize, PETSC_DETERMINE);
568:   VecSetBlockSize(newCoordinates, dim);
569:   VecSetType(newCoordinates,VECSTANDARD);
570:   DMSetCoordinatesLocal(dmNew, newCoordinates);
571:   DMGetCoordinatesLocal(dm, &coordinates);
572:   VecGetArray(coordinates, &coords);
573:   VecGetArray(newCoordinates, &newCoords);
574:   if (hasCells) {
575:     for (c = cStart; c < cEnd; ++c) {
576:       PetscInt cNew = DMPlexShiftPoint_Internal(c, depth, depthShift), dof, off, noff, d;

578:       PetscSectionGetDof(coordSection, c, &dof);
579:       PetscSectionGetOffset(coordSection, c, &off);
580:       PetscSectionGetOffset(newCoordSection, cNew, &noff);
581:       for (d = 0; d < dof; ++d) newCoords[noff+d] = coords[off+d];
582:     }
583:   }
584:   for (v = vStart; v < vEnd; ++v) {
585:     PetscInt dof, off, noff, d;

587:     PetscSectionGetDof(coordSection, v, &dof);
588:     PetscSectionGetOffset(coordSection, v, &off);
589:     PetscSectionGetOffset(newCoordSection, DMPlexShiftPoint_Internal(v, depth, depthShift), &noff);
590:     for (d = 0; d < dof; ++d) newCoords[noff+d] = coords[off+d];
591:   }
592:   VecRestoreArray(coordinates, &coords);
593:   VecRestoreArray(newCoordinates, &newCoords);
594:   VecDestroy(&newCoordinates);
595:   PetscSectionDestroy(&newCoordSection);
596:   return(0);
597: }

599: static PetscErrorCode DMPlexShiftSF_Internal(DM dm, PetscInt depthShift[], DM dmNew)
600: {
601:   PetscInt           depth = 0;
602:   PetscSF            sfPoint, sfPointNew;
603:   const PetscSFNode *remotePoints;
604:   PetscSFNode       *gremotePoints;
605:   const PetscInt    *localPoints;
606:   PetscInt          *glocalPoints, *newLocation, *newRemoteLocation;
607:   PetscInt           numRoots, numLeaves, l, pStart, pEnd, totShift = 0;
608:   PetscErrorCode     ierr;

611:   DMPlexGetDepth(dm, &depth);
612:   /* Step 9: Convert pointSF */
613:   DMGetPointSF(dm, &sfPoint);
614:   DMGetPointSF(dmNew, &sfPointNew);
615:   DMPlexGetChart(dm, &pStart, &pEnd);
616:   PetscSFGetGraph(sfPoint, &numRoots, &numLeaves, &localPoints, &remotePoints);
617:   totShift = DMPlexShiftPoint_Internal(pEnd,depth,depthShift) - pEnd;
618:   if (numRoots >= 0) {
619:     PetscMalloc2(numRoots,&newLocation,pEnd-pStart,&newRemoteLocation);
620:     for (l=0; l<numRoots; l++) newLocation[l] = DMPlexShiftPoint_Internal(l, depth, depthShift);
621:     PetscSFBcastBegin(sfPoint, MPIU_INT, newLocation, newRemoteLocation);
622:     PetscSFBcastEnd(sfPoint, MPIU_INT, newLocation, newRemoteLocation);
623:     PetscMalloc1(numLeaves,    &glocalPoints);
624:     PetscMalloc1(numLeaves, &gremotePoints);
625:     for (l = 0; l < numLeaves; ++l) {
626:       glocalPoints[l]        = DMPlexShiftPoint_Internal(localPoints[l], depth, depthShift);
627:       gremotePoints[l].rank  = remotePoints[l].rank;
628:       gremotePoints[l].index = newRemoteLocation[localPoints[l]];
629:     }
630:     PetscFree2(newLocation,newRemoteLocation);
631:     PetscSFSetGraph(sfPointNew, numRoots + totShift, numLeaves, glocalPoints, PETSC_OWN_POINTER, gremotePoints, PETSC_OWN_POINTER);
632:   }
633:   return(0);
634: }

636: static PetscErrorCode DMPlexShiftLabels_Internal(DM dm, PetscInt depthShift[], DM dmNew)
637: {
638:   PetscSF            sfPoint;
639:   DMLabel            vtkLabel, ghostLabel;
640:   const PetscSFNode *leafRemote;
641:   const PetscInt    *leafLocal;
642:   PetscInt           depth = 0, numLeaves, numLabels, l, cStart, cEnd, c, fStart, fEnd, f;
643:   PetscMPIInt        rank;
644:   PetscErrorCode     ierr;

647:   DMPlexGetDepth(dm, &depth);
648:   /* Step 10: Convert labels */
649:   DMGetNumLabels(dm, &numLabels);
650:   for (l = 0; l < numLabels; ++l) {
651:     DMLabel         label, newlabel;
652:     const char     *lname;
653:     PetscBool       isDepth, isDim;
654:     IS              valueIS;
655:     const PetscInt *values;
656:     PetscInt        numValues, val;

658:     DMGetLabelName(dm, l, &lname);
659:     PetscStrcmp(lname, "depth", &isDepth);
660:     if (isDepth) continue;
661:     PetscStrcmp(lname, "dim", &isDim);
662:     if (isDim) continue;
663:     DMCreateLabel(dmNew, lname);
664:     DMGetLabel(dm, lname, &label);
665:     DMGetLabel(dmNew, lname, &newlabel);
666:     DMLabelGetDefaultValue(label,&val);
667:     DMLabelSetDefaultValue(newlabel,val);
668:     DMLabelGetValueIS(label, &valueIS);
669:     ISGetLocalSize(valueIS, &numValues);
670:     ISGetIndices(valueIS, &values);
671:     for (val = 0; val < numValues; ++val) {
672:       IS              pointIS;
673:       const PetscInt *points;
674:       PetscInt        numPoints, p;

676:       DMLabelGetStratumIS(label, values[val], &pointIS);
677:       ISGetLocalSize(pointIS, &numPoints);
678:       ISGetIndices(pointIS, &points);
679:       for (p = 0; p < numPoints; ++p) {
680:         const PetscInt newpoint = DMPlexShiftPoint_Internal(points[p], depth, depthShift);

682:         DMLabelSetValue(newlabel, newpoint, values[val]);
683:       }
684:       ISRestoreIndices(pointIS, &points);
685:       ISDestroy(&pointIS);
686:     }
687:     ISRestoreIndices(valueIS, &values);
688:     ISDestroy(&valueIS);
689:   }
690:   /* Step 11: Make label for output (vtk) and to mark ghost points (ghost) */
691:   MPI_Comm_rank(PetscObjectComm((PetscObject)dm), &rank);
692:   DMGetPointSF(dm, &sfPoint);
693:   DMPlexGetHeightStratum(dm, 0, &cStart, &cEnd);
694:   PetscSFGetGraph(sfPoint, NULL, &numLeaves, &leafLocal, &leafRemote);
695:   DMCreateLabel(dmNew, "vtk");
696:   DMCreateLabel(dmNew, "ghost");
697:   DMGetLabel(dmNew, "vtk", &vtkLabel);
698:   DMGetLabel(dmNew, "ghost", &ghostLabel);
699:   for (l = 0, c = cStart; l < numLeaves && c < cEnd; ++l, ++c) {
700:     for (; c < leafLocal[l] && c < cEnd; ++c) {
701:       DMLabelSetValue(vtkLabel, c, 1);
702:     }
703:     if (leafLocal[l] >= cEnd) break;
704:     if (leafRemote[l].rank == rank) {
705:       DMLabelSetValue(vtkLabel, c, 1);
706:     } else {
707:       DMLabelSetValue(ghostLabel, c, 2);
708:     }
709:   }
710:   for (; c < cEnd; ++c) {
711:     DMLabelSetValue(vtkLabel, c, 1);
712:   }
713:   DMPlexGetHeightStratum(dmNew, 1, &fStart, &fEnd);
714:   for (f = fStart; f < fEnd; ++f) {
715:     PetscInt numCells;

717:     DMPlexGetSupportSize(dmNew, f, &numCells);
718:     if (numCells < 2) {
719:       DMLabelSetValue(ghostLabel, f, 1);
720:     } else {
721:       const PetscInt *cells = NULL;
722:       PetscInt        vA, vB;

724:       DMPlexGetSupport(dmNew, f, &cells);
725:       DMLabelGetValue(vtkLabel, cells[0], &vA);
726:       DMLabelGetValue(vtkLabel, cells[1], &vB);
727:       if (vA != 1 && vB != 1) {DMLabelSetValue(ghostLabel, f, 1);}
728:     }
729:   }
730:   return(0);
731: }

733: static PetscErrorCode DMPlexShiftTree_Internal(DM dm, PetscInt depthShift[], DM dmNew)
734: {
735:   DM             refTree;
736:   PetscSection   pSec;
737:   PetscInt       *parents, *childIDs;

741:   DMPlexGetReferenceTree(dm,&refTree);
742:   DMPlexSetReferenceTree(dmNew,refTree);
743:   DMPlexGetTree(dm,&pSec,&parents,&childIDs,NULL,NULL);
744:   if (pSec) {
745:     PetscInt p, pStart, pEnd, *parentsShifted, pStartShifted, pEndShifted, depth;
746:     PetscInt *childIDsShifted;
747:     PetscSection pSecShifted;

749:     PetscSectionGetChart(pSec,&pStart,&pEnd);
750:     DMPlexGetDepth(dm,&depth);
751:     pStartShifted = DMPlexShiftPoint_Internal(pStart,depth,depthShift);
752:     pEndShifted   = DMPlexShiftPoint_Internal(pEnd,depth,depthShift);
753:     PetscMalloc2(pEndShifted - pStartShifted,&parentsShifted,pEndShifted-pStartShifted,&childIDsShifted);
754:     PetscSectionCreate(PetscObjectComm((PetscObject)dmNew),&pSecShifted);
755:     PetscSectionSetChart(pSecShifted,pStartShifted,pEndShifted);
756:     for (p = pStartShifted; p < pEndShifted; p++) {
757:       /* start off assuming no children */
758:       PetscSectionSetDof(pSecShifted,p,0);
759:     }
760:     for (p = pStart; p < pEnd; p++) {
761:       PetscInt dof;
762:       PetscInt pNew = DMPlexShiftPoint_Internal(p,depth,depthShift);

764:       PetscSectionGetDof(pSec,p,&dof);
765:       PetscSectionSetDof(pSecShifted,pNew,dof);
766:     }
767:     PetscSectionSetUp(pSecShifted);
768:     for (p = pStart; p < pEnd; p++) {
769:       PetscInt dof;
770:       PetscInt pNew = DMPlexShiftPoint_Internal(p,depth,depthShift);

772:       PetscSectionGetDof(pSec,p,&dof);
773:       if (dof) {
774:         PetscInt off, offNew;

776:         PetscSectionGetOffset(pSec,p,&off);
777:         PetscSectionGetOffset(pSecShifted,pNew,&offNew);
778:         parentsShifted[offNew] = DMPlexShiftPoint_Internal(parents[off],depth,depthShift);
779:         childIDsShifted[offNew] = childIDs[off];
780:       }
781:     }
782:     DMPlexSetTree(dmNew,pSecShifted,parentsShifted,childIDsShifted);
783:     PetscFree2(parentsShifted,childIDsShifted);
784:     PetscSectionDestroy(&pSecShifted);
785:   }
786:   return(0);
787: }

789: static PetscErrorCode DMPlexConstructGhostCells_Internal(DM dm, DMLabel label, PetscInt *numGhostCells, DM gdm)
790: {
791:   PetscSF               sf;
792:   IS                    valueIS;
793:   const PetscInt       *values, *leaves;
794:   PetscInt             *depthShift;
795:   PetscInt              d, depth = 0, nleaves, loc, Ng, numFS, fs, fStart, fEnd, ghostCell, cEnd, c;
796:   PetscBool             isper;
797:   const PetscReal      *maxCell, *L;
798:   const DMBoundaryType *bd;
799:   PetscErrorCode        ierr;

802:   DMGetPointSF(dm, &sf);
803:   PetscSFGetGraph(sf, NULL, &nleaves, &leaves, NULL);
804:   nleaves = PetscMax(0, nleaves);
805:   DMPlexGetHeightStratum(dm, 1, &fStart, &fEnd);
806:   /* Count ghost cells */
807:   DMLabelGetValueIS(label, &valueIS);
808:   ISGetLocalSize(valueIS, &numFS);
809:   ISGetIndices(valueIS, &values);
810:   Ng   = 0;
811:   for (fs = 0; fs < numFS; ++fs) {
812:     IS              faceIS;
813:     const PetscInt *faces;
814:     PetscInt        numFaces, f, numBdFaces = 0;

816:     DMLabelGetStratumIS(label, values[fs], &faceIS);
817:     ISGetLocalSize(faceIS, &numFaces);
818:     ISGetIndices(faceIS, &faces);
819:     for (f = 0; f < numFaces; ++f) {
820:       PetscInt numChildren;

822:       PetscFindInt(faces[f], nleaves, leaves, &loc);
823:       DMPlexGetTreeChildren(dm,faces[f],&numChildren,NULL);
824:       /* non-local and ancestors points don't get to register ghosts */
825:       if (loc >= 0 || numChildren) continue;
826:       if ((faces[f] >= fStart) && (faces[f] < fEnd)) ++numBdFaces;
827:     }
828:     Ng += numBdFaces;
829:     ISRestoreIndices(faceIS, &faces);
830:     ISDestroy(&faceIS);
831:   }
832:   DMPlexGetDepth(dm, &depth);
833:   PetscMalloc1(2*(depth+1), &depthShift);
834:   for (d = 0; d <= depth; d++) {
835:     PetscInt dEnd;

837:     DMPlexGetDepthStratum(dm,d,NULL,&dEnd);
838:     depthShift[2*d]   = dEnd;
839:     depthShift[2*d+1] = 0;
840:   }
841:   if (depth >= 0) depthShift[2*depth+1] = Ng;
842:   DMPlexShiftPointSetUp_Internal(depth,depthShift);
843:   DMPlexShiftSizes_Internal(dm, depthShift, gdm);
844:   /* Step 3: Set cone/support sizes for new points */
845:   DMPlexGetHeightStratum(dm, 0, NULL, &cEnd);
846:   for (c = cEnd; c < cEnd + Ng; ++c) {
847:     DMPlexSetConeSize(gdm, c, 1);
848:   }
849:   for (fs = 0; fs < numFS; ++fs) {
850:     IS              faceIS;
851:     const PetscInt *faces;
852:     PetscInt        numFaces, f;

854:     DMLabelGetStratumIS(label, values[fs], &faceIS);
855:     ISGetLocalSize(faceIS, &numFaces);
856:     ISGetIndices(faceIS, &faces);
857:     for (f = 0; f < numFaces; ++f) {
858:       PetscInt size, numChildren;

860:       PetscFindInt(faces[f], nleaves, leaves, &loc);
861:       DMPlexGetTreeChildren(dm,faces[f],&numChildren,NULL);
862:       if (loc >= 0 || numChildren) continue;
863:       if ((faces[f] < fStart) || (faces[f] >= fEnd)) continue;
864:       DMPlexGetSupportSize(dm, faces[f], &size);
865:       if (size != 1) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "DM has boundary face %d with %d support cells", faces[f], size);
866:       DMPlexSetSupportSize(gdm, faces[f] + Ng, 2);
867:     }
868:     ISRestoreIndices(faceIS, &faces);
869:     ISDestroy(&faceIS);
870:   }
871:   /* Step 4: Setup ghosted DM */
872:   DMSetUp(gdm);
873:   DMPlexShiftPoints_Internal(dm, depthShift, gdm);
874:   /* Step 6: Set cones and supports for new points */
875:   ghostCell = cEnd;
876:   for (fs = 0; fs < numFS; ++fs) {
877:     IS              faceIS;
878:     const PetscInt *faces;
879:     PetscInt        numFaces, f;

881:     DMLabelGetStratumIS(label, values[fs], &faceIS);
882:     ISGetLocalSize(faceIS, &numFaces);
883:     ISGetIndices(faceIS, &faces);
884:     for (f = 0; f < numFaces; ++f) {
885:       PetscInt newFace = faces[f] + Ng, numChildren;

887:       PetscFindInt(faces[f], nleaves, leaves, &loc);
888:       DMPlexGetTreeChildren(dm,faces[f],&numChildren,NULL);
889:       if (loc >= 0 || numChildren) continue;
890:       if ((faces[f] < fStart) || (faces[f] >= fEnd)) continue;
891:       DMPlexSetCone(gdm, ghostCell, &newFace);
892:       DMPlexInsertSupport(gdm, newFace, 1, ghostCell);
893:       ++ghostCell;
894:     }
895:     ISRestoreIndices(faceIS, &faces);
896:     ISDestroy(&faceIS);
897:   }
898:   ISRestoreIndices(valueIS, &values);
899:   ISDestroy(&valueIS);
900:   DMPlexShiftCoordinates_Internal(dm, depthShift, gdm);
901:   DMPlexShiftSF_Internal(dm, depthShift, gdm);
902:   DMPlexShiftLabels_Internal(dm, depthShift, gdm);
903:   DMPlexShiftTree_Internal(dm, depthShift, gdm);
904:   PetscFree(depthShift);
905:   for (c = cEnd; c < cEnd + Ng; ++c) {
906:     DMPlexSetCellType(gdm, c, DM_POLYTOPE_FV_GHOST);
907:   }
908:   /* Step 7: Periodicity */
909:   DMGetPeriodicity(dm, &isper, &maxCell, &L, &bd);
910:   DMSetPeriodicity(gdm, isper, maxCell,  L,  bd);
911:   if (numGhostCells) *numGhostCells = Ng;
912:   return(0);
913: }

915: /*@C
916:   DMPlexConstructGhostCells - Construct ghost cells which connect to every boundary face

918:   Collective on dm

920:   Input Parameters:
921: + dm - The original DM
922: - labelName - The label specifying the boundary faces, or "Face Sets" if this is NULL

924:   Output Parameters:
925: + numGhostCells - The number of ghost cells added to the DM
926: - dmGhosted - The new DM

928:   Note: If no label exists of that name, one will be created marking all boundary faces

930:   Level: developer

932: .seealso: DMCreate()
933: @*/
934: PetscErrorCode DMPlexConstructGhostCells(DM dm, const char labelName[], PetscInt *numGhostCells, DM *dmGhosted)
935: {
936:   DM             gdm;
937:   DMLabel        label;
938:   const char    *name = labelName ? labelName : "Face Sets";
939:   PetscInt       dim, Ng = 0;
940:   PetscBool      useCone, useClosure;

947:   DMCreate(PetscObjectComm((PetscObject)dm), &gdm);
948:   DMSetType(gdm, DMPLEX);
949:   DMGetDimension(dm, &dim);
950:   DMSetDimension(gdm, dim);
951:   DMGetBasicAdjacency(dm, &useCone, &useClosure);
952:   DMSetBasicAdjacency(gdm, useCone,  useClosure);
953:   DMGetLabel(dm, name, &label);
954:   if (!label) {
955:     /* Get label for boundary faces */
956:     DMCreateLabel(dm, name);
957:     DMGetLabel(dm, name, &label);
958:     DMPlexMarkBoundaryFaces(dm, 1, label);
959:   }
960:   DMPlexConstructGhostCells_Internal(dm, label, &Ng, gdm);
961:   DMCopyBoundary(dm, gdm);
962:   DMCopyDisc(dm, gdm);
963:   gdm->setfromoptionscalled = dm->setfromoptionscalled;
964:   if (numGhostCells) *numGhostCells = Ng;
965:   *dmGhosted = gdm;
966:   return(0);
967: }

969: /*
970:   We are adding three kinds of points here:
971:     Replicated:     Copies of points which exist in the mesh, such as vertices identified across a fault
972:     Non-replicated: Points which exist on the fault, but are not replicated
973:     Hybrid:         Entirely new points, such as cohesive cells

975:   When creating subsequent cohesive cells, we shift the old hybrid cells to the end of the numbering at
976:   each depth so that the new split/hybrid points can be inserted as a block.
977: */
978: static PetscErrorCode DMPlexConstructCohesiveCells_Internal(DM dm, DMLabel label, DMLabel splitLabel, DM sdm)
979: {
980:   MPI_Comm         comm;
981:   IS               valueIS;
982:   PetscInt         numSP = 0;       /* The number of depths for which we have replicated points */
983:   const PetscInt  *values;          /* List of depths for which we have replicated points */
984:   IS              *splitIS;
985:   IS              *unsplitIS;
986:   PetscInt        *numSplitPoints;     /* The number of replicated points at each depth */
987:   PetscInt        *numUnsplitPoints;   /* The number of non-replicated points at each depth which still give rise to hybrid points */
988:   PetscInt        *numHybridPoints;    /* The number of new hybrid points at each depth */
989:   PetscInt        *numHybridPointsOld; /* The number of existing hybrid points at each depth */
990:   const PetscInt **splitPoints;        /* Replicated points for each depth */
991:   const PetscInt **unsplitPoints;      /* Non-replicated points for each depth */
992:   PetscSection     coordSection;
993:   Vec              coordinates;
994:   PetscScalar     *coords;
995:   PetscInt        *depthMax;           /* The first hybrid point at each depth in the original mesh */
996:   PetscInt        *depthEnd;           /* The point limit at each depth in the original mesh */
997:   PetscInt        *depthShift;         /* Number of replicated+hybrid points at each depth */
998:   PetscInt        *pMaxNew;            /* The first replicated point at each depth in the new mesh, hybrids come after this */
999:   PetscInt        *coneNew, *coneONew, *supportNew;
1000:   PetscInt         shift = 100, shift2 = 200, depth = 0, dep, dim, d, sp, maxConeSize, maxSupportSize, maxConeSizeNew, maxSupportSizeNew, numLabels, vStart, vEnd, pEnd, p, v;
1001:   PetscErrorCode   ierr;

1004:   PetscObjectGetComm((PetscObject)dm,&comm);
1005:   DMGetDimension(dm, &dim);
1006:   DMPlexGetDepth(dm, &depth);
1007:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
1008:   /* We do not want this label automatically computed, instead we compute it here */
1009:   DMCreateLabel(sdm, "celltype");
1010:   /* Count split points and add cohesive cells */
1011:   DMPlexGetMaxSizes(dm, &maxConeSize, &maxSupportSize);
1012:   PetscMalloc5(depth+1,&depthMax,depth+1,&depthEnd,2*(depth+1),&depthShift,depth+1,&pMaxNew,depth+1,&numHybridPointsOld);
1013:   PetscMalloc7(depth+1,&splitIS,depth+1,&unsplitIS,depth+1,&numSplitPoints,depth+1,&numUnsplitPoints,depth+1,&numHybridPoints,depth+1,&splitPoints,depth+1,&unsplitPoints);
1014:   for (d = 0; d <= depth; ++d) {
1015:     DMPlexGetDepthStratum(dm, d, NULL, &pMaxNew[d]);
1016:     DMPlexGetTensorPrismBounds_Internal(dm, d, &depthMax[d], NULL);
1017:     depthEnd[d]           = pMaxNew[d];
1018:     depthMax[d]           = depthMax[d] < 0 ? depthEnd[d] : depthMax[d];
1019:     numSplitPoints[d]     = 0;
1020:     numUnsplitPoints[d]   = 0;
1021:     numHybridPoints[d]    = 0;
1022:     numHybridPointsOld[d] = depthMax[d] < 0 ? 0 : depthEnd[d] - depthMax[d];
1023:     splitPoints[d]        = NULL;
1024:     unsplitPoints[d]      = NULL;
1025:     splitIS[d]            = NULL;
1026:     unsplitIS[d]          = NULL;
1027:     /* we are shifting the existing hybrid points with the stratum behind them, so
1028:      * the split comes at the end of the normal points, i.e., at depthMax[d] */
1029:     depthShift[2*d]       = depthMax[d];
1030:     depthShift[2*d+1]     = 0;
1031:   }
1032:   if (label) {
1033:     DMLabelGetValueIS(label, &valueIS);
1034:     ISGetLocalSize(valueIS, &numSP);
1035:     ISGetIndices(valueIS, &values);
1036:   }
1037:   for (sp = 0; sp < numSP; ++sp) {
1038:     const PetscInt dep = values[sp];

1040:     if ((dep < 0) || (dep > depth)) continue;
1041:     DMLabelGetStratumIS(label, dep, &splitIS[dep]);
1042:     if (splitIS[dep]) {
1043:       ISGetLocalSize(splitIS[dep], &numSplitPoints[dep]);
1044:       ISGetIndices(splitIS[dep], &splitPoints[dep]);
1045:     }
1046:     DMLabelGetStratumIS(label, shift2+dep, &unsplitIS[dep]);
1047:     if (unsplitIS[dep]) {
1048:       ISGetLocalSize(unsplitIS[dep], &numUnsplitPoints[dep]);
1049:       ISGetIndices(unsplitIS[dep], &unsplitPoints[dep]);
1050:     }
1051:   }
1052:   /* Calculate number of hybrid points */
1053:   for (d = 1; d <= depth; ++d) numHybridPoints[d]     = numSplitPoints[d-1] + numUnsplitPoints[d-1]; /* There is a hybrid cell/face/edge for every split face/edge/vertex   */
1054:   for (d = 0; d <= depth; ++d) depthShift[2*d+1]      = numSplitPoints[d] + numHybridPoints[d];
1055:   DMPlexShiftPointSetUp_Internal(depth,depthShift);
1056:   /* the end of the points in this stratum that come before the new points:
1057:    * shifting pMaxNew[d] gets the new start of the next stratum, then count back the old hybrid points and the newly
1058:    * added points */
1059:   for (d = 0; d <= depth; ++d) pMaxNew[d]             = DMPlexShiftPoint_Internal(pMaxNew[d],depth,depthShift) - (numHybridPointsOld[d] + numSplitPoints[d] + numHybridPoints[d]);
1060:   DMPlexShiftSizes_Internal(dm, depthShift, sdm);
1061:   /* Step 3: Set cone/support sizes for new points */
1062:   for (dep = 0; dep <= depth; ++dep) {
1063:     for (p = 0; p < numSplitPoints[dep]; ++p) {
1064:       const PetscInt  oldp   = splitPoints[dep][p];
1065:       const PetscInt  newp   = DMPlexShiftPoint_Internal(oldp, depth, depthShift) /*oldp + depthOffset[dep]*/;
1066:       const PetscInt  splitp = p    + pMaxNew[dep];
1067:       const PetscInt *support;
1068:       PetscInt        coneSize, supportSize, qf, qn, qp, e;

1070:       DMPlexGetConeSize(dm, oldp, &coneSize);
1071:       DMPlexSetConeSize(sdm, splitp, coneSize);
1072:       DMPlexGetSupportSize(dm, oldp, &supportSize);
1073:       DMPlexSetSupportSize(sdm, splitp, supportSize);
1074:       if (dep == depth-1) {
1075:         const PetscInt hybcell = p + pMaxNew[dep+1] + numSplitPoints[dep+1];

1077:         /* Add cohesive cells, they are prisms */
1078:         DMPlexSetConeSize(sdm, hybcell, 2 + coneSize);
1079:         switch (coneSize) {
1080:           case 2: DMPlexSetCellType(sdm, hybcell, DM_POLYTOPE_SEG_PRISM_TENSOR);break;
1081:           case 3: DMPlexSetCellType(sdm, hybcell, DM_POLYTOPE_TRI_PRISM_TENSOR);break;
1082:           case 4: DMPlexSetCellType(sdm, hybcell, DM_POLYTOPE_QUAD_PRISM_TENSOR);break;
1083:         }
1084:       } else if (dep == 0) {
1085:         const PetscInt hybedge = p + pMaxNew[dep+1] + numSplitPoints[dep+1];

1087:         DMPlexGetSupport(dm, oldp, &support);
1088:         for (e = 0, qn = 0, qp = 0, qf = 0; e < supportSize; ++e) {
1089:           PetscInt val;

1091:           DMLabelGetValue(label, support[e], &val);
1092:           if (val == 1) ++qf;
1093:           if ((val == 1) || (val ==  (shift + 1))) ++qn;
1094:           if ((val == 1) || (val == -(shift + 1))) ++qp;
1095:         }
1096:         /* Split old vertex: Edges into original vertex and new cohesive edge */
1097:         DMPlexSetSupportSize(sdm, newp, qn+1);
1098:         /* Split new vertex: Edges into split vertex and new cohesive edge */
1099:         DMPlexSetSupportSize(sdm, splitp, qp+1);
1100:         /* Add hybrid edge */
1101:         DMPlexSetConeSize(sdm, hybedge, 2);
1102:         DMPlexSetSupportSize(sdm, hybedge, qf);
1103:         DMPlexSetCellType(sdm, hybedge, DM_POLYTOPE_POINT_PRISM_TENSOR);
1104:       } else if (dep == dim-2) {
1105:         const PetscInt hybface = p + pMaxNew[dep+1] + numSplitPoints[dep+1];

1107:         DMPlexGetSupport(dm, oldp, &support);
1108:         for (e = 0, qn = 0, qp = 0, qf = 0; e < supportSize; ++e) {
1109:           PetscInt val;

1111:           DMLabelGetValue(label, support[e], &val);
1112:           if (val == dim-1) ++qf;
1113:           if ((val == dim-1) || (val ==  (shift + dim-1))) ++qn;
1114:           if ((val == dim-1) || (val == -(shift + dim-1))) ++qp;
1115:         }
1116:         /* Split old edge: Faces into original edge and cohesive face (positive side?) */
1117:         DMPlexSetSupportSize(sdm, newp, qn+1);
1118:         /* Split new edge: Faces into split edge and cohesive face (negative side?) */
1119:         DMPlexSetSupportSize(sdm, splitp, qp+1);
1120:         /* Add hybrid face */
1121:         DMPlexSetConeSize(sdm, hybface, 4);
1122:         DMPlexSetSupportSize(sdm, hybface, qf);
1123:         DMPlexSetCellType(sdm, hybface, DM_POLYTOPE_SEG_PRISM_TENSOR);
1124:       }
1125:     }
1126:   }
1127:   for (dep = 0; dep <= depth; ++dep) {
1128:     for (p = 0; p < numUnsplitPoints[dep]; ++p) {
1129:       const PetscInt  oldp   = unsplitPoints[dep][p];
1130:       const PetscInt  newp   = DMPlexShiftPoint_Internal(oldp, depth, depthShift) /*oldp + depthOffset[dep]*/;
1131:       const PetscInt *support;
1132:       PetscInt        coneSize, supportSize, qf, e, s;

1134:       DMPlexGetConeSize(dm, oldp, &coneSize);
1135:       DMPlexGetSupportSize(dm, oldp, &supportSize);
1136:       DMPlexGetSupport(dm, oldp, &support);
1137:       if (dep == 0) {
1138:         const PetscInt hybedge = p + pMaxNew[dep+1] + numSplitPoints[dep+1] + numSplitPoints[dep];

1140:         /* Unsplit vertex: Edges into original vertex, split edges, and new cohesive edge twice */
1141:         for (s = 0, qf = 0; s < supportSize; ++s, ++qf) {
1142:           PetscFindInt(support[s], numSplitPoints[dep+1], splitPoints[dep+1], &e);
1143:           if (e >= 0) ++qf;
1144:         }
1145:         DMPlexSetSupportSize(sdm, newp, qf+2);
1146:         /* Add hybrid edge */
1147:         DMPlexSetConeSize(sdm, hybedge, 2);
1148:         for (e = 0, qf = 0; e < supportSize; ++e) {
1149:           PetscInt val;

1151:           DMLabelGetValue(label, support[e], &val);
1152:           /* Split and unsplit edges produce hybrid faces */
1153:           if (val == 1) ++qf;
1154:           if (val == (shift2 + 1)) ++qf;
1155:         }
1156:         DMPlexSetSupportSize(sdm, hybedge, qf);
1157:         DMPlexSetCellType(sdm, hybedge, DM_POLYTOPE_POINT_PRISM_TENSOR);
1158:       } else if (dep == dim-2) {
1159:         const PetscInt hybface = p + pMaxNew[dep+1] + numSplitPoints[dep+1] + numSplitPoints[dep];
1160:         PetscInt       val;

1162:         for (e = 0, qf = 0; e < supportSize; ++e) {
1163:           DMLabelGetValue(label, support[e], &val);
1164:           if (val == dim-1) qf += 2;
1165:           else              ++qf;
1166:         }
1167:         /* Unsplit edge: Faces into original edge, split face, and cohesive face twice */
1168:         DMPlexSetSupportSize(sdm, newp, qf+2);
1169:         /* Add hybrid face */
1170:         for (e = 0, qf = 0; e < supportSize; ++e) {
1171:           DMLabelGetValue(label, support[e], &val);
1172:           if (val == dim-1) ++qf;
1173:         }
1174:         DMPlexSetConeSize(sdm, hybface, 4);
1175:         DMPlexSetSupportSize(sdm, hybface, qf);
1176:         DMPlexSetCellType(sdm, hybface, DM_POLYTOPE_SEG_PRISM_TENSOR);
1177:       }
1178:     }
1179:   }
1180:   /* Step 4: Setup split DM */
1181:   DMSetUp(sdm);
1182:   DMPlexShiftPoints_Internal(dm, depthShift, sdm);
1183:   DMPlexGetMaxSizes(sdm, &maxConeSizeNew, &maxSupportSizeNew);
1184:   PetscMalloc3(PetscMax(maxConeSize, maxConeSizeNew)*3,&coneNew,PetscMax(maxConeSize, maxConeSizeNew)*3,&coneONew,PetscMax(maxSupportSize, maxSupportSizeNew),&supportNew);
1185:   /* Step 6: Set cones and supports for new points */
1186:   for (dep = 0; dep <= depth; ++dep) {
1187:     for (p = 0; p < numSplitPoints[dep]; ++p) {
1188:       const PetscInt  oldp   = splitPoints[dep][p];
1189:       const PetscInt  newp   = DMPlexShiftPoint_Internal(oldp, depth, depthShift) /*oldp + depthOffset[dep]*/;
1190:       const PetscInt  splitp = p    + pMaxNew[dep];
1191:       const PetscInt *cone, *support, *ornt;
1192:       PetscInt        coneSize, supportSize, q, qf, qn, qp, v, e, s;

1194:       DMPlexGetConeSize(dm, oldp, &coneSize);
1195:       DMPlexGetCone(dm, oldp, &cone);
1196:       DMPlexGetConeOrientation(dm, oldp, &ornt);
1197:       DMPlexGetSupportSize(dm, oldp, &supportSize);
1198:       DMPlexGetSupport(dm, oldp, &support);
1199:       if (dep == depth-1) {
1200:         PetscBool       hasUnsplit = PETSC_FALSE;
1201:         const PetscInt  hybcell    = p + pMaxNew[dep+1] + numSplitPoints[dep+1];
1202:         const PetscInt *supportF;

1204:         /* Split face:       copy in old face to new face to start */
1205:         DMPlexGetSupport(sdm, newp,  &supportF);
1206:         DMPlexSetSupport(sdm, splitp, supportF);
1207:         /* Split old face:   old vertices/edges in cone so no change */
1208:         /* Split new face:   new vertices/edges in cone */
1209:         for (q = 0; q < coneSize; ++q) {
1210:           PetscFindInt(cone[q], numSplitPoints[dep-1], splitPoints[dep-1], &v);
1211:           if (v < 0) {
1212:             PetscFindInt(cone[q], numUnsplitPoints[dep-1], unsplitPoints[dep-1], &v);
1213:             if (v < 0) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not locate point %d in split or unsplit points of depth %d", cone[q], dep-1);
1214:             coneNew[2+q] = DMPlexShiftPoint_Internal(cone[q], depth, depthShift) /*cone[q] + depthOffset[dep-1]*/;
1215:             hasUnsplit   = PETSC_TRUE;
1216:           } else {
1217:             coneNew[2+q] = v + pMaxNew[dep-1];
1218:             if (dep > 1) {
1219:               const PetscInt *econe;
1220:               PetscInt        econeSize, r, vs, vu;

1222:               DMPlexGetConeSize(dm, cone[q], &econeSize);
1223:               DMPlexGetCone(dm, cone[q], &econe);
1224:               for (r = 0; r < econeSize; ++r) {
1225:                 PetscFindInt(econe[r], numSplitPoints[dep-2],   splitPoints[dep-2],   &vs);
1226:                 PetscFindInt(econe[r], numUnsplitPoints[dep-2], unsplitPoints[dep-2], &vu);
1227:                 if (vs >= 0) continue;
1228:                 if (vu < 0) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not locate point %d in split or unsplit points of depth %d", econe[r], dep-2);
1229:                 hasUnsplit   = PETSC_TRUE;
1230:               }
1231:             }
1232:           }
1233:         }
1234:         DMPlexSetCone(sdm, splitp, &coneNew[2]);
1235:         DMPlexSetConeOrientation(sdm, splitp, ornt);
1236:         /* Face support */
1237:         for (s = 0; s < supportSize; ++s) {
1238:           PetscInt val;

1240:           DMLabelGetValue(label, support[s], &val);
1241:           if (val < 0) {
1242:             /* Split old face:   Replace negative side cell with cohesive cell */
1243:              DMPlexInsertSupport(sdm, newp, s, hybcell);
1244:           } else {
1245:             /* Split new face:   Replace positive side cell with cohesive cell */
1246:             DMPlexInsertSupport(sdm, splitp, s, hybcell);
1247:             /* Get orientation for cohesive face */
1248:             {
1249:               const PetscInt *ncone, *nconeO;
1250:               PetscInt        nconeSize, nc;

1252:               DMPlexGetConeSize(dm, support[s], &nconeSize);
1253:               DMPlexGetCone(dm, support[s], &ncone);
1254:               DMPlexGetConeOrientation(dm, support[s], &nconeO);
1255:               for (nc = 0; nc < nconeSize; ++nc) {
1256:                 if (ncone[nc] == oldp) {
1257:                   coneONew[0] = nconeO[nc];
1258:                   break;
1259:                 }
1260:               }
1261:               if (nc >= nconeSize) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not locate face %d in neighboring cell %d", oldp, support[s]);
1262:             }
1263:           }
1264:         }
1265:         /* Cohesive cell:    Old and new split face, then new cohesive faces */
1266:         coneNew[0]  = newp;   /* Extracted negative side orientation above */
1267:         coneNew[1]  = splitp;
1268:         coneONew[1] = coneONew[0];
1269:         for (q = 0; q < coneSize; ++q) {
1270:           /* Hybrid faces must follow order from oriented end face */
1271:           const PetscInt o  = coneONew[0];
1272:           const PetscInt qo = o < 0 ? (-(o+1)+coneSize-q)%coneSize : (q+o)%coneSize;

1274:           PetscFindInt(cone[qo], numSplitPoints[dep-1], splitPoints[dep-1], &v);
1275:           if (v < 0) {
1276:             PetscFindInt(cone[qo], numUnsplitPoints[dep-1], unsplitPoints[dep-1], &v);
1277:             coneNew[2+q]  = v + pMaxNew[dep] + numSplitPoints[dep] + numSplitPoints[dep-1];
1278:           } else {
1279:             coneNew[2+q]  = v + pMaxNew[dep] + numSplitPoints[dep];
1280:           }
1281:           coneONew[2+q] = ((o < 0) + (ornt[qo] < 0))%2 ? -1 : 0;
1282:         }
1283:         DMPlexSetCone(sdm, hybcell, coneNew);
1284:         DMPlexSetConeOrientation(sdm, hybcell, coneONew);
1285:         /* Label the hybrid cells on the boundary of the split */
1286:         if (hasUnsplit) {DMLabelSetValue(label, -hybcell, dim);}
1287:       } else if (dep == 0) {
1288:         const PetscInt hybedge = p + pMaxNew[dep+1] + numSplitPoints[dep+1];

1290:         /* Split old vertex: Edges in old split faces and new cohesive edge */
1291:         for (e = 0, qn = 0; e < supportSize; ++e) {
1292:           PetscInt val;

1294:           DMLabelGetValue(label, support[e], &val);
1295:           if ((val == 1) || (val == (shift + 1))) {
1296:             supportNew[qn++] = DMPlexShiftPoint_Internal(support[e], depth, depthShift) /*support[e] + depthOffset[dep+1]*/;
1297:           }
1298:         }
1299:         supportNew[qn] = hybedge;
1300:         DMPlexSetSupport(sdm, newp, supportNew);
1301:         /* Split new vertex: Edges in new split faces and new cohesive edge */
1302:         for (e = 0, qp = 0; e < supportSize; ++e) {
1303:           PetscInt val, edge;

1305:           DMLabelGetValue(label, support[e], &val);
1306:           if (val == 1) {
1307:             PetscFindInt(support[e], numSplitPoints[dep+1], splitPoints[dep+1], &edge);
1308:             if (edge < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Edge %d is not a split edge", support[e]);
1309:             supportNew[qp++] = edge + pMaxNew[dep+1];
1310:           } else if (val == -(shift + 1)) {
1311:             supportNew[qp++] = DMPlexShiftPoint_Internal(support[e], depth, depthShift) /*support[e] + depthOffset[dep+1]*/;
1312:           }
1313:         }
1314:         supportNew[qp] = hybedge;
1315:         DMPlexSetSupport(sdm, splitp, supportNew);
1316:         /* Hybrid edge:    Old and new split vertex */
1317:         coneNew[0] = newp;
1318:         coneNew[1] = splitp;
1319:         DMPlexSetCone(sdm, hybedge, coneNew);
1320:         for (e = 0, qf = 0; e < supportSize; ++e) {
1321:           PetscInt val, edge;

1323:           DMLabelGetValue(label, support[e], &val);
1324:           if (val == 1) {
1325:             PetscFindInt(support[e], numSplitPoints[dep+1], splitPoints[dep+1], &edge);
1326:             if (edge < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Edge %d is not a split edge", support[e]);
1327:             supportNew[qf++] = edge + pMaxNew[dep+2] + numSplitPoints[dep+2];
1328:           }
1329:         }
1330:         DMPlexSetSupport(sdm, hybedge, supportNew);
1331:       } else if (dep == dim-2) {
1332:         const PetscInt hybface = p + pMaxNew[dep+1] + numSplitPoints[dep+1];

1334:         /* Split old edge:   old vertices in cone so no change */
1335:         /* Split new edge:   new vertices in cone */
1336:         for (q = 0; q < coneSize; ++q) {
1337:           PetscFindInt(cone[q], numSplitPoints[dep-1], splitPoints[dep-1], &v);
1338:           if (v < 0) {
1339:             PetscFindInt(cone[q], numUnsplitPoints[dep-1], unsplitPoints[dep-1], &v);
1340:             if (v < 0) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not locate point %d in split or unsplit points of depth %d", cone[q], dep-1);
1341:             coneNew[q] = DMPlexShiftPoint_Internal(cone[q], depth, depthShift) /*cone[q] + depthOffset[dep-1]*/;
1342:           } else {
1343:             coneNew[q] = v + pMaxNew[dep-1];
1344:           }
1345:         }
1346:         DMPlexSetCone(sdm, splitp, coneNew);
1347:         /* Split old edge: Faces in positive side cells and old split faces */
1348:         for (e = 0, q = 0; e < supportSize; ++e) {
1349:           PetscInt val;

1351:           DMLabelGetValue(label, support[e], &val);
1352:           if (val == dim-1) {
1353:             supportNew[q++] = DMPlexShiftPoint_Internal(support[e], depth, depthShift) /*support[e] + depthOffset[dep+1]*/;
1354:           } else if (val == (shift + dim-1)) {
1355:             supportNew[q++] = DMPlexShiftPoint_Internal(support[e], depth, depthShift) /*support[e] + depthOffset[dep+1]*/;
1356:           }
1357:         }
1358:         supportNew[q++] = p + pMaxNew[dep+1] + numSplitPoints[dep+1];
1359:         DMPlexSetSupport(sdm, newp, supportNew);
1360:         /* Split new edge: Faces in negative side cells and new split faces */
1361:         for (e = 0, q = 0; e < supportSize; ++e) {
1362:           PetscInt val, face;

1364:           DMLabelGetValue(label, support[e], &val);
1365:           if (val == dim-1) {
1366:             PetscFindInt(support[e], numSplitPoints[dep+1], splitPoints[dep+1], &face);
1367:             if (face < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Face %d is not a split face", support[e]);
1368:             supportNew[q++] = face + pMaxNew[dep+1];
1369:           } else if (val == -(shift + dim-1)) {
1370:             supportNew[q++] = DMPlexShiftPoint_Internal(support[e], depth, depthShift) /*support[e] + depthOffset[dep+1]*/;
1371:           }
1372:         }
1373:         supportNew[q++] = p + pMaxNew[dep+1] + numSplitPoints[dep+1];
1374:         DMPlexSetSupport(sdm, splitp, supportNew);
1375:         /* Hybrid face */
1376:         coneNew[0] = newp;
1377:         coneNew[1] = splitp;
1378:         for (v = 0; v < coneSize; ++v) {
1379:           PetscInt vertex;
1380:           PetscFindInt(cone[v], numSplitPoints[dep-1], splitPoints[dep-1], &vertex);
1381:           if (vertex < 0) {
1382:             PetscFindInt(cone[v], numUnsplitPoints[dep-1], unsplitPoints[dep-1], &vertex);
1383:             if (vertex < 0) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not locate point %d in split or unsplit points of depth %d", cone[v], dep-1);
1384:             coneNew[2+v] = vertex + pMaxNew[dep] + numSplitPoints[dep] + numSplitPoints[dep-1];
1385:           } else {
1386:             coneNew[2+v] = vertex + pMaxNew[dep] + numSplitPoints[dep];
1387:           }
1388:         }
1389:         DMPlexSetCone(sdm, hybface, coneNew);
1390:         for (e = 0, qf = 0; e < supportSize; ++e) {
1391:           PetscInt val, face;

1393:           DMLabelGetValue(label, support[e], &val);
1394:           if (val == dim-1) {
1395:             PetscFindInt(support[e], numSplitPoints[dep+1], splitPoints[dep+1], &face);
1396:             if (face < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Face %d is not a split face", support[e]);
1397:             supportNew[qf++] = face + pMaxNew[dep+2] + numSplitPoints[dep+2];
1398:           }
1399:         }
1400:         DMPlexSetSupport(sdm, hybface, supportNew);
1401:       }
1402:     }
1403:   }
1404:   for (dep = 0; dep <= depth; ++dep) {
1405:     for (p = 0; p < numUnsplitPoints[dep]; ++p) {
1406:       const PetscInt  oldp   = unsplitPoints[dep][p];
1407:       const PetscInt  newp   = DMPlexShiftPoint_Internal(oldp, depth, depthShift) /*oldp + depthOffset[dep]*/;
1408:       const PetscInt *cone, *support, *ornt;
1409:       PetscInt        coneSize, supportSize, supportSizeNew, q, qf, e, f, s;

1411:       DMPlexGetConeSize(dm, oldp, &coneSize);
1412:       DMPlexGetCone(dm, oldp, &cone);
1413:       DMPlexGetConeOrientation(dm, oldp, &ornt);
1414:       DMPlexGetSupportSize(dm, oldp, &supportSize);
1415:       DMPlexGetSupport(dm, oldp, &support);
1416:       if (dep == 0) {
1417:         const PetscInt hybedge = p + pMaxNew[dep+1] + numSplitPoints[dep+1] + numSplitPoints[dep];

1419:         /* Unsplit vertex */
1420:         DMPlexGetSupportSize(sdm, newp, &supportSizeNew);
1421:         for (s = 0, q = 0; s < supportSize; ++s) {
1422:           supportNew[q++] = DMPlexShiftPoint_Internal(support[s], depth, depthShift) /*support[s] + depthOffset[dep+1]*/;
1423:           PetscFindInt(support[s], numSplitPoints[dep+1], splitPoints[dep+1], &e);
1424:           if (e >= 0) {
1425:             supportNew[q++] = e + pMaxNew[dep+1];
1426:           }
1427:         }
1428:         supportNew[q++] = hybedge;
1429:         supportNew[q++] = hybedge;
1430:         if (q != supportSizeNew) SETERRQ3(comm, PETSC_ERR_ARG_WRONG, "Support size %d != %d for vertex %d", q, supportSizeNew, newp);
1431:         DMPlexSetSupport(sdm, newp, supportNew);
1432:         /* Hybrid edge */
1433:         coneNew[0] = newp;
1434:         coneNew[1] = newp;
1435:         DMPlexSetCone(sdm, hybedge, coneNew);
1436:         for (e = 0, qf = 0; e < supportSize; ++e) {
1437:           PetscInt val, edge;

1439:           DMLabelGetValue(label, support[e], &val);
1440:           if (val == 1) {
1441:             PetscFindInt(support[e], numSplitPoints[dep+1], splitPoints[dep+1], &edge);
1442:             if (edge < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Edge %d is not a split edge", support[e]);
1443:             supportNew[qf++] = edge + pMaxNew[dep+2] + numSplitPoints[dep+2];
1444:           } else if  (val ==  (shift2 + 1)) {
1445:             PetscFindInt(support[e], numUnsplitPoints[dep+1], unsplitPoints[dep+1], &edge);
1446:             if (edge < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Edge %d is not a unsplit edge", support[e]);
1447:             supportNew[qf++] = edge + pMaxNew[dep+2] + numSplitPoints[dep+2] + numSplitPoints[dep+1];
1448:           }
1449:         }
1450:         DMPlexSetSupport(sdm, hybedge, supportNew);
1451:       } else if (dep == dim-2) {
1452:         const PetscInt hybface = p + pMaxNew[dep+1] + numSplitPoints[dep+1] + numSplitPoints[dep];

1454:         /* Unsplit edge: Faces into original edge, split face, and hybrid face twice */
1455:         for (f = 0, qf = 0; f < supportSize; ++f) {
1456:           PetscInt val, face;

1458:           DMLabelGetValue(label, support[f], &val);
1459:           if (val == dim-1) {
1460:             PetscFindInt(support[f], numSplitPoints[dep+1], splitPoints[dep+1], &face);
1461:             if (face < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Face %d is not a split face", support[f]);
1462:             supportNew[qf++] = DMPlexShiftPoint_Internal(support[f], depth, depthShift) /*support[f] + depthOffset[dep+1]*/;
1463:             supportNew[qf++] = face + pMaxNew[dep+1];
1464:           } else {
1465:             supportNew[qf++] = DMPlexShiftPoint_Internal(support[f], depth, depthShift) /*support[f] + depthOffset[dep+1]*/;
1466:           }
1467:         }
1468:         supportNew[qf++] = hybface;
1469:         supportNew[qf++] = hybface;
1470:         DMPlexGetSupportSize(sdm, newp, &supportSizeNew);
1471:         if (qf != supportSizeNew) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Support size for unsplit edge %d is %d != %d\n", newp, qf, supportSizeNew);
1472:         DMPlexSetSupport(sdm, newp, supportNew);
1473:         /* Add hybrid face */
1474:         coneNew[0] = newp;
1475:         coneNew[1] = newp;
1476:         PetscFindInt(cone[0], numUnsplitPoints[dep-1], unsplitPoints[dep-1], &v);
1477:         if (v < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Vertex %d is not an unsplit vertex", cone[0]);
1478:         coneNew[2] = v + pMaxNew[dep] + numSplitPoints[dep] + numSplitPoints[dep-1];
1479:         PetscFindInt(cone[1], numUnsplitPoints[dep-1], unsplitPoints[dep-1], &v);
1480:         if (v < 0) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Vertex %d is not an unsplit vertex", cone[1]);
1481:         coneNew[3] = v + pMaxNew[dep] + numSplitPoints[dep] + numSplitPoints[dep-1];
1482:         DMPlexSetCone(sdm, hybface, coneNew);
1483:         for (f = 0, qf = 0; f < supportSize; ++f) {
1484:           PetscInt val, face;

1486:           DMLabelGetValue(label, support[f], &val);
1487:           if (val == dim-1) {
1488:             PetscFindInt(support[f], numSplitPoints[dep+1], splitPoints[dep+1], &face);
1489:             supportNew[qf++] = face + pMaxNew[dep+2] + numSplitPoints[dep+2];
1490:           }
1491:         }
1492:         DMPlexGetSupportSize(sdm, hybface, &supportSizeNew);
1493:         if (qf != supportSizeNew) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Support size for hybrid face %d is %d != %d\n", hybface, qf, supportSizeNew);
1494:         DMPlexSetSupport(sdm, hybface, supportNew);
1495:       }
1496:     }
1497:   }
1498:   /* Step 6b: Replace split points in negative side cones */
1499:   for (sp = 0; sp < numSP; ++sp) {
1500:     PetscInt        dep = values[sp];
1501:     IS              pIS;
1502:     PetscInt        numPoints;
1503:     const PetscInt *points;

1505:     if (dep >= 0) continue;
1506:     DMLabelGetStratumIS(label, dep, &pIS);
1507:     if (!pIS) continue;
1508:     dep  = -dep - shift;
1509:     ISGetLocalSize(pIS, &numPoints);
1510:     ISGetIndices(pIS, &points);
1511:     for (p = 0; p < numPoints; ++p) {
1512:       const PetscInt  oldp = points[p];
1513:       const PetscInt  newp = DMPlexShiftPoint_Internal(oldp, depth, depthShift) /*depthOffset[dep] + oldp*/;
1514:       const PetscInt *cone;
1515:       PetscInt        coneSize, c;
1516:       /* PetscBool       replaced = PETSC_FALSE; */

1518:       /* Negative edge: replace split vertex */
1519:       /* Negative cell: replace split face */
1520:       DMPlexGetConeSize(sdm, newp, &coneSize);
1521:       DMPlexGetCone(sdm, newp, &cone);
1522:       for (c = 0; c < coneSize; ++c) {
1523:         const PetscInt coldp = DMPlexShiftPointInverse_Internal(cone[c],depth,depthShift);
1524:         PetscInt       csplitp, cp, val;

1526:         DMLabelGetValue(label, coldp, &val);
1527:         if (val == dep-1) {
1528:           PetscFindInt(coldp, numSplitPoints[dep-1], splitPoints[dep-1], &cp);
1529:           if (cp < 0) SETERRQ2(comm, PETSC_ERR_ARG_WRONG, "Point %d is not a split point of dimension %d", oldp, dep-1);
1530:           csplitp  = pMaxNew[dep-1] + cp;
1531:           DMPlexInsertCone(sdm, newp, c, csplitp);
1532:           /* replaced = PETSC_TRUE; */
1533:         }
1534:       }
1535:       /* Cells with only a vertex or edge on the submesh have no replacement */
1536:       /* if (!replaced) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "The cone of point %d does not contain split points", oldp); */
1537:     }
1538:     ISRestoreIndices(pIS, &points);
1539:     ISDestroy(&pIS);
1540:   }
1541:   /* Step 7: Coordinates */
1542:   DMPlexShiftCoordinates_Internal(dm, depthShift, sdm);
1543:   DMGetCoordinateSection(sdm, &coordSection);
1544:   DMGetCoordinatesLocal(sdm, &coordinates);
1545:   VecGetArray(coordinates, &coords);
1546:   for (v = 0; v < (numSplitPoints ? numSplitPoints[0] : 0); ++v) {
1547:     const PetscInt newp   = DMPlexShiftPoint_Internal(splitPoints[0][v], depth, depthShift) /*depthOffset[0] + splitPoints[0][v]*/;
1548:     const PetscInt splitp = pMaxNew[0] + v;
1549:     PetscInt       dof, off, soff, d;

1551:     PetscSectionGetDof(coordSection, newp, &dof);
1552:     PetscSectionGetOffset(coordSection, newp, &off);
1553:     PetscSectionGetOffset(coordSection, splitp, &soff);
1554:     for (d = 0; d < dof; ++d) coords[soff+d] = coords[off+d];
1555:   }
1556:   VecRestoreArray(coordinates, &coords);
1557:   /* Step 8: SF, if I can figure this out we can split the mesh in parallel */
1558:   DMPlexShiftSF_Internal(dm, depthShift, sdm);
1559:   /* Step 9: Labels */
1560:   DMPlexShiftLabels_Internal(dm, depthShift, sdm);
1561:   DMGetNumLabels(sdm, &numLabels);
1562:   for (dep = 0; dep <= depth; ++dep) {
1563:     for (p = 0; p < numSplitPoints[dep]; ++p) {
1564:       const PetscInt newp   = DMPlexShiftPoint_Internal(splitPoints[dep][p], depth, depthShift) /*depthOffset[dep] + splitPoints[dep][p]*/;
1565:       const PetscInt splitp = pMaxNew[dep] + p;
1566:       PetscInt       l;

1568:       if (splitLabel) {
1569:         const PetscInt val = 100 + dep;

1571:         DMLabelSetValue(splitLabel, newp,    val);
1572:         DMLabelSetValue(splitLabel, splitp, -val);
1573:       }
1574:       for (l = 0; l < numLabels; ++l) {
1575:         DMLabel     mlabel;
1576:         const char *lname;
1577:         PetscInt    val;
1578:         PetscBool   isDepth;

1580:         DMGetLabelName(sdm, l, &lname);
1581:         PetscStrcmp(lname, "depth", &isDepth);
1582:         if (isDepth) continue;
1583:         DMGetLabel(sdm, lname, &mlabel);
1584:         DMLabelGetValue(mlabel, newp, &val);
1585:         if (val >= 0) {
1586:           DMLabelSetValue(mlabel, splitp, val);
1587:         }
1588:       }
1589:     }
1590:   }
1591:   for (sp = 0; sp < numSP; ++sp) {
1592:     const PetscInt dep = values[sp];

1594:     if ((dep < 0) || (dep > depth)) continue;
1595:     if (splitIS[dep]) {ISRestoreIndices(splitIS[dep], &splitPoints[dep]);}
1596:     ISDestroy(&splitIS[dep]);
1597:     if (unsplitIS[dep]) {ISRestoreIndices(unsplitIS[dep], &unsplitPoints[dep]);}
1598:     ISDestroy(&unsplitIS[dep]);
1599:   }
1600:   if (label) {
1601:     ISRestoreIndices(valueIS, &values);
1602:     ISDestroy(&valueIS);
1603:   }
1604:   for (d = 0; d <= depth; ++d) {
1605:     DMPlexGetDepthStratum(sdm, d, NULL, &pEnd);
1606:     pMaxNew[d] = pEnd - numHybridPoints[d] - numHybridPointsOld[d];
1607:   }
1608:   PetscFree3(coneNew, coneONew, supportNew);
1609:   PetscFree5(depthMax, depthEnd, depthShift, pMaxNew, numHybridPointsOld);
1610:   PetscFree7(splitIS, unsplitIS, numSplitPoints, numUnsplitPoints, numHybridPoints, splitPoints, unsplitPoints);
1611:   return(0);
1612: }

1614: /*@C
1615:   DMPlexConstructCohesiveCells - Construct cohesive cells which split the face along an internal interface

1617:   Collective on dm

1619:   Input Parameters:
1620: + dm - The original DM
1621: - label - The label specifying the boundary faces (this could be auto-generated)

1623:   Output Parameters:
1624: + splitLabel - The label containing the split points, or NULL if no output is desired
1625: - dmSplit - The new DM

1627:   Level: developer

1629: .seealso: DMCreate(), DMPlexLabelCohesiveComplete()
1630: @*/
1631: PetscErrorCode DMPlexConstructCohesiveCells(DM dm, DMLabel label, DMLabel splitLabel, DM *dmSplit)
1632: {
1633:   DM             sdm;
1634:   PetscInt       dim;

1640:   DMCreate(PetscObjectComm((PetscObject)dm), &sdm);
1641:   DMSetType(sdm, DMPLEX);
1642:   DMGetDimension(dm, &dim);
1643:   DMSetDimension(sdm, dim);
1644:   switch (dim) {
1645:   case 2:
1646:   case 3:
1647:     DMPlexConstructCohesiveCells_Internal(dm, label, splitLabel, sdm);
1648:     break;
1649:   default:
1650:     SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_OUTOFRANGE, "Cannot construct cohesive cells for dimension %d", dim);
1651:   }
1652:   *dmSplit = sdm;
1653:   return(0);
1654: }

1656: /* Returns the side of the surface for a given cell with a face on the surface */
1657: static PetscErrorCode GetSurfaceSide_Static(DM dm, DM subdm, PetscInt numSubpoints, const PetscInt *subpoints, PetscInt cell, PetscInt face, PetscBool *pos)
1658: {
1659:   const PetscInt *cone, *ornt;
1660:   PetscInt        dim, coneSize, c;
1661:   PetscErrorCode  ierr;

1664:   *pos = PETSC_TRUE;
1665:   DMGetDimension(dm, &dim);
1666:   DMPlexGetConeSize(dm, cell, &coneSize);
1667:   DMPlexGetCone(dm, cell, &cone);
1668:   DMPlexGetConeOrientation(dm, cell, &ornt);
1669:   for (c = 0; c < coneSize; ++c) {
1670:     if (cone[c] == face) {
1671:       PetscInt o = ornt[c];

1673:       if (subdm) {
1674:         const PetscInt *subcone, *subornt;
1675:         PetscInt        subpoint, subface, subconeSize, sc;

1677:         PetscFindInt(cell, numSubpoints, subpoints, &subpoint);
1678:         PetscFindInt(face, numSubpoints, subpoints, &subface);
1679:         DMPlexGetConeSize(subdm, subpoint, &subconeSize);
1680:         DMPlexGetCone(subdm, subpoint, &subcone);
1681:         DMPlexGetConeOrientation(subdm, subpoint, &subornt);
1682:         for (sc = 0; sc < subconeSize; ++sc) {
1683:           if (subcone[sc] == subface) {
1684:             o = subornt[0];
1685:             break;
1686:           }
1687:         }
1688:         if (sc >= subconeSize) SETERRQ4(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not find subpoint %d (%d) in cone for subpoint %d (%d)", subface, face, subpoint, cell);
1689:       }
1690:       if (o >= 0) *pos = PETSC_TRUE;
1691:       else        *pos = PETSC_FALSE;
1692:       break;
1693:     }
1694:   }
1695:   if (c == coneSize) SETERRQ2(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Cell %d in split face %d support does not have it in the cone", cell, face);
1696:   return(0);
1697: }

1699: /*@
1700:   DMPlexLabelCohesiveComplete - Starting with a label marking points on an internal surface, we add all other mesh pieces
1701:   to complete the surface

1703:   Input Parameters:
1704: + dm     - The DM
1705: . label  - A DMLabel marking the surface
1706: . blabel - A DMLabel marking the vertices on the boundary which will not be duplicated, or NULL to find them automatically
1707: . flip   - Flag to flip the submesh normal and replace points on the other side
1708: - subdm  - The subDM associated with the label, or NULL

1710:   Output Parameter:
1711: . label - A DMLabel marking all surface points

1713:   Note: The vertices in blabel are called "unsplit" in the terminology from hybrid cell creation.

1715:   Level: developer

1717: .seealso: DMPlexConstructCohesiveCells(), DMPlexLabelComplete()
1718: @*/
1719: PetscErrorCode DMPlexLabelCohesiveComplete(DM dm, DMLabel label, DMLabel blabel, PetscBool flip, DM subdm)
1720: {
1721:   DMLabel         depthLabel;
1722:   IS              dimIS, subpointIS = NULL, facePosIS, faceNegIS, crossEdgeIS = NULL;
1723:   const PetscInt *points, *subpoints;
1724:   const PetscInt  rev   = flip ? -1 : 1;
1725:   PetscInt        shift = 100, shift2 = 200, dim, depth, dep, cStart, cEnd, vStart, vEnd, numPoints, numSubpoints, p, val;
1726:   PetscErrorCode  ierr;

1729:   DMPlexGetDepth(dm, &depth);
1730:   DMGetDimension(dm, &dim);
1731:   DMPlexGetDepthLabel(dm, &depthLabel);
1732:   if (subdm) {
1733:     DMPlexCreateSubpointIS(subdm, &subpointIS);
1734:     if (subpointIS) {
1735:       ISGetLocalSize(subpointIS, &numSubpoints);
1736:       ISGetIndices(subpointIS, &subpoints);
1737:     }
1738:   }
1739:   /* Mark cell on the fault, and its faces which touch the fault: cell orientation for face gives the side of the fault */
1740:   DMLabelGetStratumIS(label, dim-1, &dimIS);
1741:   if (!dimIS) {
1742:     ISDestroy(&subpointIS);
1743:     return(0);
1744:   }
1745:   ISGetLocalSize(dimIS, &numPoints);
1746:   ISGetIndices(dimIS, &points);
1747:   for (p = 0; p < numPoints; ++p) { /* Loop over fault faces */
1748:     const PetscInt *support;
1749:     PetscInt        supportSize, s;

1751:     DMPlexGetSupportSize(dm, points[p], &supportSize);
1752: #if 0
1753:     if (supportSize != 2) {
1754:       const PetscInt *lp;
1755:       PetscInt        Nlp, pind;

1757:       /* Check that for a cell with a single support face, that face is in the SF */
1758:       /*   THis check only works for the remote side. We would need root side information */
1759:       PetscSFGetGraph(dm->sf, NULL, &Nlp, &lp, NULL);
1760:       PetscFindInt(points[p], Nlp, lp, &pind);
1761:       if (pind < 0) SETERRQ2(PetscObjectComm((PetscObject) dm), PETSC_ERR_ARG_WRONG, "Split face %d has %d != 2 supports, and the face is not shared with another process", points[p], supportSize);
1762:     }
1763: #endif
1764:     DMPlexGetSupport(dm, points[p], &support);
1765:     for (s = 0; s < supportSize; ++s) {
1766:       const PetscInt *cone;
1767:       PetscInt        coneSize, c;
1768:       PetscBool       pos;

1770:       GetSurfaceSide_Static(dm, subdm, numSubpoints, subpoints, support[s], points[p], &pos);
1771:       if (pos) {DMLabelSetValue(label, support[s],  rev*(shift+dim));}
1772:       else     {DMLabelSetValue(label, support[s], -rev*(shift+dim));}
1773:       if (rev < 0) pos = !pos ? PETSC_TRUE : PETSC_FALSE;
1774:       /* Put faces touching the fault in the label */
1775:       DMPlexGetConeSize(dm, support[s], &coneSize);
1776:       DMPlexGetCone(dm, support[s], &cone);
1777:       for (c = 0; c < coneSize; ++c) {
1778:         const PetscInt point = cone[c];

1780:         DMLabelGetValue(label, point, &val);
1781:         if (val == -1) {
1782:           PetscInt *closure = NULL;
1783:           PetscInt  closureSize, cl;

1785:           DMPlexGetTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
1786:           for (cl = 0; cl < closureSize*2; cl += 2) {
1787:             const PetscInt clp  = closure[cl];
1788:             PetscInt       bval = -1;

1790:             DMLabelGetValue(label, clp, &val);
1791:             if (blabel) {DMLabelGetValue(blabel, clp, &bval);}
1792:             if ((val >= 0) && (val < dim-1) && (bval < 0)) {
1793:               DMLabelSetValue(label, point, pos == PETSC_TRUE ? shift+dim-1 : -(shift+dim-1));
1794:               break;
1795:             }
1796:           }
1797:           DMPlexRestoreTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
1798:         }
1799:       }
1800:     }
1801:   }
1802:   ISRestoreIndices(dimIS, &points);
1803:   ISDestroy(&dimIS);
1804:   if (subpointIS) {ISRestoreIndices(subpointIS, &subpoints);}
1805:   ISDestroy(&subpointIS);
1806:   /* Mark boundary points as unsplit */
1807:   if (blabel) {
1808:     DMLabelGetStratumIS(blabel, 1, &dimIS);
1809:     ISGetLocalSize(dimIS, &numPoints);
1810:     ISGetIndices(dimIS, &points);
1811:     for (p = 0; p < numPoints; ++p) {
1812:       const PetscInt point = points[p];
1813:       PetscInt       val, bval;

1815:       DMLabelGetValue(blabel, point, &bval);
1816:       if (bval >= 0) {
1817:         DMLabelGetValue(label, point, &val);
1818:         if ((val < 0) || (val > dim)) {
1819:           /* This could be a point added from splitting a vertex on an adjacent fault, otherwise its just wrong */
1820:           DMLabelClearValue(blabel, point, bval);
1821:         }
1822:       }
1823:     }
1824:     for (p = 0; p < numPoints; ++p) {
1825:       const PetscInt point = points[p];
1826:       PetscInt       val, bval;

1828:       DMLabelGetValue(blabel, point, &bval);
1829:       if (bval >= 0) {
1830:         const PetscInt *cone,    *support;
1831:         PetscInt        coneSize, supportSize, s, valA, valB, valE;

1833:         /* Mark as unsplit */
1834:         DMLabelGetValue(label, point, &val);
1835:         if ((val < 0) || (val > dim)) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Point %d has label value %d, should be part of the fault", point, val);
1836:         DMLabelClearValue(label, point, val);
1837:         DMLabelSetValue(label, point, shift2+val);
1838:         /* Check for cross-edge
1839:              A cross-edge has endpoints which are both on the boundary of the surface, but the edge itself is not. */
1840:         if (val != 0) continue;
1841:         DMPlexGetSupport(dm, point, &support);
1842:         DMPlexGetSupportSize(dm, point, &supportSize);
1843:         for (s = 0; s < supportSize; ++s) {
1844:           DMPlexGetCone(dm, support[s], &cone);
1845:           DMPlexGetConeSize(dm, support[s], &coneSize);
1846:           if (coneSize != 2) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Edge %D has %D vertices != 2", support[s], coneSize);
1847:           DMLabelGetValue(blabel, cone[0], &valA);
1848:           DMLabelGetValue(blabel, cone[1], &valB);
1849:           DMLabelGetValue(blabel, support[s], &valE);
1850:           if ((valE < 0) && (valA >= 0) && (valB >= 0) && (cone[0] != cone[1])) {DMLabelSetValue(blabel, support[s], 2);}
1851:         }
1852:       }
1853:     }
1854:     ISRestoreIndices(dimIS, &points);
1855:     ISDestroy(&dimIS);
1856:   }
1857:   /* Search for other cells/faces/edges connected to the fault by a vertex */
1858:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
1859:   DMPlexGetSimplexOrBoxCells(dm, 0, &cStart, &cEnd);
1860:   DMLabelGetStratumIS(label, 0, &dimIS);
1861:   if (blabel) {DMLabelGetStratumIS(blabel, 2, &crossEdgeIS);}
1862:   if (dimIS && crossEdgeIS) {
1863:     IS vertIS = dimIS;

1865:     ISExpand(vertIS, crossEdgeIS, &dimIS);
1866:     ISDestroy(&crossEdgeIS);
1867:     ISDestroy(&vertIS);
1868:   }
1869:   if (!dimIS) {
1870:     return(0);
1871:   }
1872:   ISGetLocalSize(dimIS, &numPoints);
1873:   ISGetIndices(dimIS, &points);
1874:   for (p = 0; p < numPoints; ++p) { /* Loop over fault vertices */
1875:     PetscInt *star = NULL;
1876:     PetscInt  starSize, s;
1877:     PetscInt  again = 1;  /* 0: Finished 1: Keep iterating after a change 2: No change */

1879:     /* All points connected to the fault are inside a cell, so at the top level we will only check cells */
1880:     DMPlexGetTransitiveClosure(dm, points[p], PETSC_FALSE, &starSize, &star);
1881:     while (again) {
1882:       if (again > 1) SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Could not classify all cells connected to the fault");
1883:       again = 0;
1884:       for (s = 0; s < starSize*2; s += 2) {
1885:         const PetscInt  point = star[s];
1886:         const PetscInt *cone;
1887:         PetscInt        coneSize, c;

1889:         if ((point < cStart) || (point >= cEnd)) continue;
1890:         DMLabelGetValue(label, point, &val);
1891:         if (val != -1) continue;
1892:         again = again == 1 ? 1 : 2;
1893:         DMPlexGetConeSize(dm, point, &coneSize);
1894:         DMPlexGetCone(dm, point, &cone);
1895:         for (c = 0; c < coneSize; ++c) {
1896:           DMLabelGetValue(label, cone[c], &val);
1897:           if (val != -1) {
1898:             const PetscInt *ccone;
1899:             PetscInt        cconeSize, cc, side;

1901:             if (PetscAbs(val) < shift) SETERRQ3(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Face %d on cell %d has an invalid label %d", cone[c], point, val);
1902:             if (val > 0) side =  1;
1903:             else         side = -1;
1904:             DMLabelSetValue(label, point, side*(shift+dim));
1905:             /* Mark cell faces which touch the fault */
1906:             DMPlexGetConeSize(dm, point, &cconeSize);
1907:             DMPlexGetCone(dm, point, &ccone);
1908:             for (cc = 0; cc < cconeSize; ++cc) {
1909:               PetscInt *closure = NULL;
1910:               PetscInt  closureSize, cl;

1912:               DMLabelGetValue(label, ccone[cc], &val);
1913:               if (val != -1) continue;
1914:               DMPlexGetTransitiveClosure(dm, ccone[cc], PETSC_TRUE, &closureSize, &closure);
1915:               for (cl = 0; cl < closureSize*2; cl += 2) {
1916:                 const PetscInt clp = closure[cl];

1918:                 DMLabelGetValue(label, clp, &val);
1919:                 if (val == -1) continue;
1920:                 DMLabelSetValue(label, ccone[cc], side*(shift+dim-1));
1921:                 break;
1922:               }
1923:               DMPlexRestoreTransitiveClosure(dm, ccone[cc], PETSC_TRUE, &closureSize, &closure);
1924:             }
1925:             again = 1;
1926:             break;
1927:           }
1928:         }
1929:       }
1930:     }
1931:     /* Classify the rest by cell membership */
1932:     for (s = 0; s < starSize*2; s += 2) {
1933:       const PetscInt point = star[s];

1935:       DMLabelGetValue(label, point, &val);
1936:       if (val == -1) {
1937:         PetscInt      *sstar = NULL;
1938:         PetscInt       sstarSize, ss;
1939:         PetscBool      marked = PETSC_FALSE, isHybrid;

1941:         DMPlexGetTransitiveClosure(dm, point, PETSC_FALSE, &sstarSize, &sstar);
1942:         for (ss = 0; ss < sstarSize*2; ss += 2) {
1943:           const PetscInt spoint = sstar[ss];

1945:           if ((spoint < cStart) || (spoint >= cEnd)) continue;
1946:           DMLabelGetValue(label, spoint, &val);
1947:           if (val == -1) SETERRQ2(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Cell %d in star of %d does not have a valid label", spoint, point);
1948:           DMLabelGetValue(depthLabel, point, &dep);
1949:           if (val > 0) {
1950:             DMLabelSetValue(label, point,   shift+dep);
1951:           } else {
1952:             DMLabelSetValue(label, point, -(shift+dep));
1953:           }
1954:           marked = PETSC_TRUE;
1955:           break;
1956:         }
1957:         DMPlexRestoreTransitiveClosure(dm, point, PETSC_FALSE, &sstarSize, &sstar);
1958:         DMPlexCellIsHybrid_Internal(dm, point, &isHybrid);
1959:         if (!isHybrid && !marked) SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Point %d could not be classified", point);
1960:       }
1961:     }
1962:     DMPlexRestoreTransitiveClosure(dm, points[p], PETSC_FALSE, &starSize, &star);
1963:   }
1964:   ISRestoreIndices(dimIS, &points);
1965:   ISDestroy(&dimIS);
1966:   /* If any faces touching the fault divide cells on either side, split them */
1967:   DMLabelGetStratumIS(label,   shift+dim-1,  &facePosIS);
1968:   DMLabelGetStratumIS(label, -(shift+dim-1), &faceNegIS);
1969:   ISExpand(facePosIS, faceNegIS, &dimIS);
1970:   ISDestroy(&facePosIS);
1971:   ISDestroy(&faceNegIS);
1972:   ISGetLocalSize(dimIS, &numPoints);
1973:   ISGetIndices(dimIS, &points);
1974:   for (p = 0; p < numPoints; ++p) {
1975:     const PetscInt  point = points[p];
1976:     const PetscInt *support;
1977:     PetscInt        supportSize, valA, valB;

1979:     DMPlexGetSupportSize(dm, point, &supportSize);
1980:     if (supportSize != 2) continue;
1981:     DMPlexGetSupport(dm, point, &support);
1982:     DMLabelGetValue(label, support[0], &valA);
1983:     DMLabelGetValue(label, support[1], &valB);
1984:     if ((valA == -1) || (valB == -1)) continue;
1985:     if (valA*valB > 0) continue;
1986:     /* Split the face */
1987:     DMLabelGetValue(label, point, &valA);
1988:     DMLabelClearValue(label, point, valA);
1989:     DMLabelSetValue(label, point, dim-1);
1990:     /* Label its closure:
1991:       unmarked: label as unsplit
1992:       incident: relabel as split
1993:       split:    do nothing
1994:     */
1995:     {
1996:       PetscInt *closure = NULL;
1997:       PetscInt  closureSize, cl;

1999:       DMPlexGetTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
2000:       for (cl = 0; cl < closureSize*2; cl += 2) {
2001:         DMLabelGetValue(label, closure[cl], &valA);
2002:         if (valA == -1) { /* Mark as unsplit */
2003:           DMLabelGetValue(depthLabel, closure[cl], &dep);
2004:           DMLabelSetValue(label, closure[cl], shift2+dep);
2005:         } else if (((valA >= shift) && (valA < shift2)) || ((valA <= -shift) && (valA > -shift2))) {
2006:           DMLabelGetValue(depthLabel, closure[cl], &dep);
2007:           DMLabelClearValue(label, closure[cl], valA);
2008:           DMLabelSetValue(label, closure[cl], dep);
2009:         }
2010:       }
2011:       DMPlexRestoreTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
2012:     }
2013:   }
2014:   ISRestoreIndices(dimIS, &points);
2015:   ISDestroy(&dimIS);
2016:   return(0);
2017: }

2019: /* Check that no cell have all vertices on the fault */
2020: PetscErrorCode DMPlexCheckValidSubmesh_Private(DM dm, DMLabel label, DM subdm)
2021: {
2022:   IS              subpointIS;
2023:   const PetscInt *dmpoints;
2024:   PetscInt        defaultValue, cStart, cEnd, c, vStart, vEnd;
2025:   PetscErrorCode  ierr;

2028:   if (!label) return(0);
2029:   DMLabelGetDefaultValue(label, &defaultValue);
2030:   DMPlexCreateSubpointIS(subdm, &subpointIS);
2031:   if (!subpointIS) return(0);
2032:   DMPlexGetHeightStratum(subdm, 0, &cStart, &cEnd);
2033:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
2034:   ISGetIndices(subpointIS, &dmpoints);
2035:   for (c = cStart; c < cEnd; ++c) {
2036:     PetscBool invalidCell = PETSC_TRUE;
2037:     PetscInt *closure     = NULL;
2038:     PetscInt  closureSize, cl;

2040:     DMPlexGetTransitiveClosure(dm, dmpoints[c], PETSC_TRUE, &closureSize, &closure);
2041:     for (cl = 0; cl < closureSize*2; cl += 2) {
2042:       PetscInt value = 0;

2044:       if ((closure[cl] < vStart) || (closure[cl] >= vEnd)) continue;
2045:       DMLabelGetValue(label, closure[cl], &value);
2046:       if (value == defaultValue) {invalidCell = PETSC_FALSE; break;}
2047:     }
2048:     DMPlexRestoreTransitiveClosure(dm, dmpoints[c], PETSC_TRUE, &closureSize, &closure);
2049:     if (invalidCell) {
2050:       ISRestoreIndices(subpointIS, &dmpoints);
2051:       ISDestroy(&subpointIS);
2052:       DMDestroy(&subdm);
2053:       SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Ambiguous submesh. Cell %D has all of its vertices on the submesh.", dmpoints[c]);
2054:     }
2055:   }
2056:   ISRestoreIndices(subpointIS, &dmpoints);
2057:   ISDestroy(&subpointIS);
2058:   return(0);
2059: }


2062: /*@
2063:   DMPlexCreateHybridMesh - Create a mesh with hybrid cells along an internal interface

2065:   Collective on dm

2067:   Input Parameters:
2068: + dm - The original DM
2069: . label - The label specifying the interface vertices
2070: - bdlabel - The optional label specifying the interface boundary vertices

2072:   Output Parameters:
2073: + hybridLabel - The label fully marking the interface, or NULL if no output is desired
2074: . splitLabel - The label containing the split points, or NULL if no output is desired
2075: . dmInterface - The new interface DM, or NULL
2076: - dmHybrid - The new DM with cohesive cells

2078:   Note: The hybridLabel indicates what parts of the original mesh impinged on the on division surface. For points
2079:   directly on the division surface, they are labeled with their dimension, so an edge 7 on the division surface would be
2080:   7 (1) in hybridLabel. For points that impinge from the positive side, they are labeled with 100+dim, so an edge 6 with
2081:   one vertex 3 on the surface would be 6 (101) and 3 (0) in hybridLabel. If an edge 9 from the negative side of the
2082:   surface also hits vertex 3, it would be 9 (-101) in hybridLabel.

2084:   The splitLabel indicates what points in the new hybrid mesh were the result of splitting points in the original
2085:   mesh. The label value is +=100+dim for each point. For example, if two edges 10 and 14 in the hybrid resulting from
2086:   splitting an edge in the original mesh, you would have 10 (101) and 14 (-101) in the splitLabel.

2088:   The dmInterface is a DM built from the original division surface. It has a label which can be retrieved using
2089:   DMPlexGetSubpointMap() which maps each point back to the point in the surface of the original mesh.

2091:   Level: developer

2093: .seealso: DMPlexConstructCohesiveCells(), DMPlexLabelCohesiveComplete(), DMPlexGetSubpointMap(), DMCreate()
2094: @*/
2095: PetscErrorCode DMPlexCreateHybridMesh(DM dm, DMLabel label, DMLabel bdlabel, DMLabel *hybridLabel, DMLabel *splitLabel, DM *dmInterface, DM *dmHybrid)
2096: {
2097:   DM             idm;
2098:   DMLabel        subpointMap, hlabel, slabel = NULL;
2099:   PetscInt       dim;

2109:   DMGetDimension(dm, &dim);
2110:   DMPlexCreateSubmesh(dm, label, 1, PETSC_FALSE, &idm);
2111:   DMPlexCheckValidSubmesh_Private(dm, label, idm);
2112:   DMPlexOrient(idm);
2113:   DMPlexGetSubpointMap(idm, &subpointMap);
2114:   DMLabelDuplicate(subpointMap, &hlabel);
2115:   DMLabelClearStratum(hlabel, dim);
2116:   if (splitLabel) {
2117:     const char *name;
2118:     char        sname[PETSC_MAX_PATH_LEN];

2120:     PetscObjectGetName((PetscObject) hlabel, &name);
2121:     PetscStrncpy(sname, name, PETSC_MAX_PATH_LEN);
2122:     PetscStrcat(sname, " split");
2123:     DMLabelCreate(PETSC_COMM_SELF, sname, &slabel);
2124:   }
2125:   DMPlexLabelCohesiveComplete(dm, hlabel, bdlabel, PETSC_FALSE, idm);
2126:   if (dmInterface) {*dmInterface = idm;}
2127:   else             {DMDestroy(&idm);}
2128:   DMPlexConstructCohesiveCells(dm, hlabel, slabel, dmHybrid);
2129:   if (hybridLabel) *hybridLabel = hlabel;
2130:   else             {DMLabelDestroy(&hlabel);}
2131:   if (splitLabel)  *splitLabel  = slabel;
2132:   return(0);
2133: }

2135: /* Here we need the explicit assumption that:

2137:      For any marked cell, the marked vertices constitute a single face
2138: */
2139: static PetscErrorCode DMPlexMarkSubmesh_Uninterpolated(DM dm, DMLabel vertexLabel, PetscInt value, DMLabel subpointMap, PetscInt *numFaces, PetscInt *nFV, DM subdm)
2140: {
2141:   IS               subvertexIS = NULL;
2142:   const PetscInt  *subvertices;
2143:   PetscInt        *pStart, *pEnd, pSize;
2144:   PetscInt         depth, dim, d, numSubVerticesInitial = 0, v;
2145:   PetscErrorCode   ierr;

2148:   *numFaces = 0;
2149:   *nFV      = 0;
2150:   DMPlexGetDepth(dm, &depth);
2151:   DMGetDimension(dm, &dim);
2152:   pSize = PetscMax(depth, dim) + 1;
2153:   PetscMalloc2(pSize, &pStart, pSize, &pEnd);
2154:   for (d = 0; d <= depth; ++d) {
2155:     DMPlexGetSimplexOrBoxCells(dm, depth-d, &pStart[d], &pEnd[d]);
2156:   }
2157:   /* Loop over initial vertices and mark all faces in the collective star() */
2158:   if (vertexLabel) {DMLabelGetStratumIS(vertexLabel, value, &subvertexIS);}
2159:   if (subvertexIS) {
2160:     ISGetSize(subvertexIS, &numSubVerticesInitial);
2161:     ISGetIndices(subvertexIS, &subvertices);
2162:   }
2163:   for (v = 0; v < numSubVerticesInitial; ++v) {
2164:     const PetscInt vertex = subvertices[v];
2165:     PetscInt      *star   = NULL;
2166:     PetscInt       starSize, s, numCells = 0, c;

2168:     DMPlexGetTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2169:     for (s = 0; s < starSize*2; s += 2) {
2170:       const PetscInt point = star[s];
2171:       if ((point >= pStart[depth]) && (point < pEnd[depth])) star[numCells++] = point;
2172:     }
2173:     for (c = 0; c < numCells; ++c) {
2174:       const PetscInt cell    = star[c];
2175:       PetscInt      *closure = NULL;
2176:       PetscInt       closureSize, cl;
2177:       PetscInt       cellLoc, numCorners = 0, faceSize = 0;

2179:       DMLabelGetValue(subpointMap, cell, &cellLoc);
2180:       if (cellLoc == 2) continue;
2181:       if (cellLoc >= 0) SETERRQ2(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Cell %d has dimension %d in the surface label", cell, cellLoc);
2182:       DMPlexGetTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2183:       for (cl = 0; cl < closureSize*2; cl += 2) {
2184:         const PetscInt point = closure[cl];
2185:         PetscInt       vertexLoc;

2187:         if ((point >= pStart[0]) && (point < pEnd[0])) {
2188:           ++numCorners;
2189:           DMLabelGetValue(vertexLabel, point, &vertexLoc);
2190:           if (vertexLoc == value) closure[faceSize++] = point;
2191:         }
2192:       }
2193:       if (!(*nFV)) {DMPlexGetNumFaceVertices(dm, dim, numCorners, nFV);}
2194:       if (faceSize > *nFV) SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Invalid submesh: Too many vertices %d of an element on the surface", faceSize);
2195:       if (faceSize == *nFV) {
2196:         const PetscInt *cells = NULL;
2197:         PetscInt        numCells, nc;

2199:         ++(*numFaces);
2200:         for (cl = 0; cl < faceSize; ++cl) {
2201:           DMLabelSetValue(subpointMap, closure[cl], 0);
2202:         }
2203:         DMPlexGetJoin(dm, faceSize, closure, &numCells, &cells);
2204:         for (nc = 0; nc < numCells; ++nc) {
2205:           DMLabelSetValue(subpointMap, cells[nc], 2);
2206:         }
2207:         DMPlexRestoreJoin(dm, faceSize, closure, &numCells, &cells);
2208:       }
2209:       DMPlexRestoreTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2210:     }
2211:     DMPlexRestoreTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2212:   }
2213:   if (subvertexIS) {
2214:     ISRestoreIndices(subvertexIS, &subvertices);
2215:   }
2216:   ISDestroy(&subvertexIS);
2217:   PetscFree2(pStart, pEnd);
2218:   return(0);
2219: }

2221: static PetscErrorCode DMPlexMarkSubmesh_Interpolated(DM dm, DMLabel vertexLabel, PetscInt value, PetscBool markedFaces, DMLabel subpointMap, DM subdm)
2222: {
2223:   IS               subvertexIS = NULL;
2224:   const PetscInt  *subvertices;
2225:   PetscInt        *pStart, *pEnd;
2226:   PetscInt         dim, d, numSubVerticesInitial = 0, v;
2227:   PetscErrorCode   ierr;

2230:   DMGetDimension(dm, &dim);
2231:   PetscMalloc2(dim+1, &pStart, dim+1, &pEnd);
2232:   for (d = 0; d <= dim; ++d) {
2233:     DMPlexGetSimplexOrBoxCells(dm, dim-d, &pStart[d], &pEnd[d]);
2234:   }
2235:   /* Loop over initial vertices and mark all faces in the collective star() */
2236:   if (vertexLabel) {
2237:     DMLabelGetStratumIS(vertexLabel, value, &subvertexIS);
2238:     if (subvertexIS) {
2239:       ISGetSize(subvertexIS, &numSubVerticesInitial);
2240:       ISGetIndices(subvertexIS, &subvertices);
2241:     }
2242:   }
2243:   for (v = 0; v < numSubVerticesInitial; ++v) {
2244:     const PetscInt vertex = subvertices[v];
2245:     PetscInt      *star   = NULL;
2246:     PetscInt       starSize, s, numFaces = 0, f;

2248:     DMPlexGetTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2249:     for (s = 0; s < starSize*2; s += 2) {
2250:       const PetscInt point = star[s];
2251:       PetscInt       faceLoc;

2253:       if ((point >= pStart[dim-1]) && (point < pEnd[dim-1])) {
2254:         if (markedFaces) {
2255:           DMLabelGetValue(vertexLabel, point, &faceLoc);
2256:           if (faceLoc < 0) continue;
2257:         }
2258:         star[numFaces++] = point;
2259:       }
2260:     }
2261:     for (f = 0; f < numFaces; ++f) {
2262:       const PetscInt face    = star[f];
2263:       PetscInt      *closure = NULL;
2264:       PetscInt       closureSize, c;
2265:       PetscInt       faceLoc;

2267:       DMLabelGetValue(subpointMap, face, &faceLoc);
2268:       if (faceLoc == dim-1) continue;
2269:       if (faceLoc >= 0) SETERRQ2(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Face %d has dimension %d in the surface label", face, faceLoc);
2270:       DMPlexGetTransitiveClosure(dm, face, PETSC_TRUE, &closureSize, &closure);
2271:       for (c = 0; c < closureSize*2; c += 2) {
2272:         const PetscInt point = closure[c];
2273:         PetscInt       vertexLoc;

2275:         if ((point >= pStart[0]) && (point < pEnd[0])) {
2276:           DMLabelGetValue(vertexLabel, point, &vertexLoc);
2277:           if (vertexLoc != value) break;
2278:         }
2279:       }
2280:       if (c == closureSize*2) {
2281:         const PetscInt *support;
2282:         PetscInt        supportSize, s;

2284:         for (c = 0; c < closureSize*2; c += 2) {
2285:           const PetscInt point = closure[c];

2287:           for (d = 0; d < dim; ++d) {
2288:             if ((point >= pStart[d]) && (point < pEnd[d])) {
2289:               DMLabelSetValue(subpointMap, point, d);
2290:               break;
2291:             }
2292:           }
2293:         }
2294:         DMPlexGetSupportSize(dm, face, &supportSize);
2295:         DMPlexGetSupport(dm, face, &support);
2296:         for (s = 0; s < supportSize; ++s) {
2297:           DMLabelSetValue(subpointMap, support[s], dim);
2298:         }
2299:       }
2300:       DMPlexRestoreTransitiveClosure(dm, face, PETSC_TRUE, &closureSize, &closure);
2301:     }
2302:     DMPlexRestoreTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2303:   }
2304:   if (subvertexIS) {ISRestoreIndices(subvertexIS, &subvertices);}
2305:   ISDestroy(&subvertexIS);
2306:   PetscFree2(pStart, pEnd);
2307:   return(0);
2308: }

2310: static PetscErrorCode DMPlexMarkCohesiveSubmesh_Uninterpolated(DM dm, PetscBool hasLagrange, const char labelname[], PetscInt value, DMLabel subpointMap, PetscInt *numFaces, PetscInt *nFV, PetscInt *subCells[], DM subdm)
2311: {
2312:   DMLabel         label = NULL;
2313:   const PetscInt *cone;
2314:   PetscInt        dim, cMax, cEnd, c, subc = 0, p, coneSize = -1;
2315:   PetscErrorCode  ierr;

2318:   *numFaces = 0;
2319:   *nFV = 0;
2320:   if (labelname) {DMGetLabel(dm, labelname, &label);}
2321:   *subCells = NULL;
2322:   DMGetDimension(dm, &dim);
2323:   DMPlexGetTensorPrismBounds_Internal(dm, dim, &cMax, &cEnd);
2324:   if (cMax < 0) return(0);
2325:   if (label) {
2326:     for (c = cMax; c < cEnd; ++c) {
2327:       PetscInt val;

2329:       DMLabelGetValue(label, c, &val);
2330:       if (val == value) {
2331:         ++(*numFaces);
2332:         DMPlexGetConeSize(dm, c, &coneSize);
2333:       }
2334:     }
2335:   } else {
2336:     *numFaces = cEnd - cMax;
2337:     DMPlexGetConeSize(dm, cMax, &coneSize);
2338:   }
2339:   PetscMalloc1(*numFaces *2, subCells);
2340:   if (!(*numFaces)) return(0);
2341:   *nFV = hasLagrange ? coneSize/3 : coneSize/2;
2342:   for (c = cMax; c < cEnd; ++c) {
2343:     const PetscInt *cells;
2344:     PetscInt        numCells;

2346:     if (label) {
2347:       PetscInt val;

2349:       DMLabelGetValue(label, c, &val);
2350:       if (val != value) continue;
2351:     }
2352:     DMPlexGetCone(dm, c, &cone);
2353:     for (p = 0; p < *nFV; ++p) {
2354:       DMLabelSetValue(subpointMap, cone[p], 0);
2355:     }
2356:     /* Negative face */
2357:     DMPlexGetJoin(dm, *nFV, cone, &numCells, &cells);
2358:     /* Not true in parallel
2359:     if (numCells != 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive cells should separate two cells"); */
2360:     for (p = 0; p < numCells; ++p) {
2361:       DMLabelSetValue(subpointMap, cells[p], 2);
2362:       (*subCells)[subc++] = cells[p];
2363:     }
2364:     DMPlexRestoreJoin(dm, *nFV, cone, &numCells, &cells);
2365:     /* Positive face is not included */
2366:   }
2367:   return(0);
2368: }

2370: static PetscErrorCode DMPlexMarkCohesiveSubmesh_Interpolated(DM dm, DMLabel label, PetscInt value, DMLabel subpointMap, DM subdm)
2371: {
2372:   PetscInt      *pStart, *pEnd;
2373:   PetscInt       dim, cMax, cEnd, c, d;

2377:   DMGetDimension(dm, &dim);
2378:   DMPlexGetTensorPrismBounds_Internal(dm, dim, &cMax, &cEnd);
2379:   if (cMax < 0) return(0);
2380:   PetscMalloc2(dim+1,&pStart,dim+1,&pEnd);
2381:   for (d = 0; d <= dim; ++d) {DMPlexGetDepthStratum(dm, d, &pStart[d], &pEnd[d]);}
2382:   for (c = cMax; c < cEnd; ++c) {
2383:     const PetscInt *cone;
2384:     PetscInt       *closure = NULL;
2385:     PetscInt        fconeSize, coneSize, closureSize, cl, val;

2387:     if (label) {
2388:       DMLabelGetValue(label, c, &val);
2389:       if (val != value) continue;
2390:     }
2391:     DMPlexGetConeSize(dm, c, &coneSize);
2392:     DMPlexGetCone(dm, c, &cone);
2393:     DMPlexGetConeSize(dm, cone[0], &fconeSize);
2394:     if (coneSize != (fconeSize ? fconeSize : 1) + 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive cells should separate two cells");
2395:     /* Negative face */
2396:     DMPlexGetTransitiveClosure(dm, cone[0], PETSC_TRUE, &closureSize, &closure);
2397:     for (cl = 0; cl < closureSize*2; cl += 2) {
2398:       const PetscInt point = closure[cl];

2400:       for (d = 0; d <= dim; ++d) {
2401:         if ((point >= pStart[d]) && (point < pEnd[d])) {
2402:           DMLabelSetValue(subpointMap, point, d);
2403:           break;
2404:         }
2405:       }
2406:     }
2407:     DMPlexRestoreTransitiveClosure(dm, cone[0], PETSC_TRUE, &closureSize, &closure);
2408:     /* Cells -- positive face is not included */
2409:     for (cl = 0; cl < 1; ++cl) {
2410:       const PetscInt *support;
2411:       PetscInt        supportSize, s;

2413:       DMPlexGetSupportSize(dm, cone[cl], &supportSize);
2414:       /* if (supportSize != 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive faces should separate two cells"); */
2415:       DMPlexGetSupport(dm, cone[cl], &support);
2416:       for (s = 0; s < supportSize; ++s) {
2417:         DMLabelSetValue(subpointMap, support[s], dim);
2418:       }
2419:     }
2420:   }
2421:   PetscFree2(pStart, pEnd);
2422:   return(0);
2423: }

2425: static PetscErrorCode DMPlexGetFaceOrientation(DM dm, PetscInt cell, PetscInt numCorners, PetscInt indices[], PetscInt oppositeVertex, PetscInt origVertices[], PetscInt faceVertices[], PetscBool *posOriented)
2426: {
2427:   MPI_Comm       comm;
2428:   PetscBool      posOrient = PETSC_FALSE;
2429:   const PetscInt debug     = 0;
2430:   PetscInt       cellDim, faceSize, f;

2434:   PetscObjectGetComm((PetscObject)dm,&comm);
2435:   DMGetDimension(dm, &cellDim);
2436:   if (debug) {PetscPrintf(comm, "cellDim: %d numCorners: %d\n", cellDim, numCorners);}

2438:   if (cellDim == 1 && numCorners == 2) {
2439:     /* Triangle */
2440:     faceSize  = numCorners-1;
2441:     posOrient = !(oppositeVertex%2) ? PETSC_TRUE : PETSC_FALSE;
2442:   } else if (cellDim == 2 && numCorners == 3) {
2443:     /* Triangle */
2444:     faceSize  = numCorners-1;
2445:     posOrient = !(oppositeVertex%2) ? PETSC_TRUE : PETSC_FALSE;
2446:   } else if (cellDim == 3 && numCorners == 4) {
2447:     /* Tetrahedron */
2448:     faceSize  = numCorners-1;
2449:     posOrient = (oppositeVertex%2) ? PETSC_TRUE : PETSC_FALSE;
2450:   } else if (cellDim == 1 && numCorners == 3) {
2451:     /* Quadratic line */
2452:     faceSize  = 1;
2453:     posOrient = PETSC_TRUE;
2454:   } else if (cellDim == 2 && numCorners == 4) {
2455:     /* Quads */
2456:     faceSize = 2;
2457:     if ((indices[1] > indices[0]) && (indices[1] - indices[0] == 1)) {
2458:       posOrient = PETSC_TRUE;
2459:     } else if ((indices[0] == 3) && (indices[1] == 0)) {
2460:       posOrient = PETSC_TRUE;
2461:     } else {
2462:       if (((indices[0] > indices[1]) && (indices[0] - indices[1] == 1)) || ((indices[0] == 0) && (indices[1] == 3))) {
2463:         posOrient = PETSC_FALSE;
2464:       } else SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid quad crossedge");
2465:     }
2466:   } else if (cellDim == 2 && numCorners == 6) {
2467:     /* Quadratic triangle (I hate this) */
2468:     /* Edges are determined by the first 2 vertices (corners of edges) */
2469:     const PetscInt faceSizeTri = 3;
2470:     PetscInt       sortedIndices[3], i, iFace;
2471:     PetscBool      found                    = PETSC_FALSE;
2472:     PetscInt       faceVerticesTriSorted[9] = {
2473:       0, 3,  4, /* bottom */
2474:       1, 4,  5, /* right */
2475:       2, 3,  5, /* left */
2476:     };
2477:     PetscInt       faceVerticesTri[9] = {
2478:       0, 3,  4, /* bottom */
2479:       1, 4,  5, /* right */
2480:       2, 5,  3, /* left */
2481:     };

2483:     for (i = 0; i < faceSizeTri; ++i) sortedIndices[i] = indices[i];
2484:     PetscSortInt(faceSizeTri, sortedIndices);
2485:     for (iFace = 0; iFace < 3; ++iFace) {
2486:       const PetscInt ii = iFace*faceSizeTri;
2487:       PetscInt       fVertex, cVertex;

2489:       if ((sortedIndices[0] == faceVerticesTriSorted[ii+0]) &&
2490:           (sortedIndices[1] == faceVerticesTriSorted[ii+1])) {
2491:         for (fVertex = 0; fVertex < faceSizeTri; ++fVertex) {
2492:           for (cVertex = 0; cVertex < faceSizeTri; ++cVertex) {
2493:             if (indices[cVertex] == faceVerticesTri[ii+fVertex]) {
2494:               faceVertices[fVertex] = origVertices[cVertex];
2495:               break;
2496:             }
2497:           }
2498:         }
2499:         found = PETSC_TRUE;
2500:         break;
2501:       }
2502:     }
2503:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid tri crossface");
2504:     if (posOriented) *posOriented = PETSC_TRUE;
2505:     return(0);
2506:   } else if (cellDim == 2 && numCorners == 9) {
2507:     /* Quadratic quad (I hate this) */
2508:     /* Edges are determined by the first 2 vertices (corners of edges) */
2509:     const PetscInt faceSizeQuad = 3;
2510:     PetscInt       sortedIndices[3], i, iFace;
2511:     PetscBool      found                      = PETSC_FALSE;
2512:     PetscInt       faceVerticesQuadSorted[12] = {
2513:       0, 1,  4, /* bottom */
2514:       1, 2,  5, /* right */
2515:       2, 3,  6, /* top */
2516:       0, 3,  7, /* left */
2517:     };
2518:     PetscInt       faceVerticesQuad[12] = {
2519:       0, 1,  4, /* bottom */
2520:       1, 2,  5, /* right */
2521:       2, 3,  6, /* top */
2522:       3, 0,  7, /* left */
2523:     };

2525:     for (i = 0; i < faceSizeQuad; ++i) sortedIndices[i] = indices[i];
2526:     PetscSortInt(faceSizeQuad, sortedIndices);
2527:     for (iFace = 0; iFace < 4; ++iFace) {
2528:       const PetscInt ii = iFace*faceSizeQuad;
2529:       PetscInt       fVertex, cVertex;

2531:       if ((sortedIndices[0] == faceVerticesQuadSorted[ii+0]) &&
2532:           (sortedIndices[1] == faceVerticesQuadSorted[ii+1])) {
2533:         for (fVertex = 0; fVertex < faceSizeQuad; ++fVertex) {
2534:           for (cVertex = 0; cVertex < faceSizeQuad; ++cVertex) {
2535:             if (indices[cVertex] == faceVerticesQuad[ii+fVertex]) {
2536:               faceVertices[fVertex] = origVertices[cVertex];
2537:               break;
2538:             }
2539:           }
2540:         }
2541:         found = PETSC_TRUE;
2542:         break;
2543:       }
2544:     }
2545:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid quad crossface");
2546:     if (posOriented) *posOriented = PETSC_TRUE;
2547:     return(0);
2548:   } else if (cellDim == 3 && numCorners == 8) {
2549:     /* Hexes
2550:        A hex is two oriented quads with the normal of the first
2551:        pointing up at the second.

2553:           7---6
2554:          /|  /|
2555:         4---5 |
2556:         | 1-|-2
2557:         |/  |/
2558:         0---3

2560:         Faces are determined by the first 4 vertices (corners of faces) */
2561:     const PetscInt faceSizeHex = 4;
2562:     PetscInt       sortedIndices[4], i, iFace;
2563:     PetscBool      found                     = PETSC_FALSE;
2564:     PetscInt       faceVerticesHexSorted[24] = {
2565:       0, 1, 2, 3,  /* bottom */
2566:       4, 5, 6, 7,  /* top */
2567:       0, 3, 4, 5,  /* front */
2568:       2, 3, 5, 6,  /* right */
2569:       1, 2, 6, 7,  /* back */
2570:       0, 1, 4, 7,  /* left */
2571:     };
2572:     PetscInt       faceVerticesHex[24] = {
2573:       1, 2, 3, 0,  /* bottom */
2574:       4, 5, 6, 7,  /* top */
2575:       0, 3, 5, 4,  /* front */
2576:       3, 2, 6, 5,  /* right */
2577:       2, 1, 7, 6,  /* back */
2578:       1, 0, 4, 7,  /* left */
2579:     };

2581:     for (i = 0; i < faceSizeHex; ++i) sortedIndices[i] = indices[i];
2582:     PetscSortInt(faceSizeHex, sortedIndices);
2583:     for (iFace = 0; iFace < 6; ++iFace) {
2584:       const PetscInt ii = iFace*faceSizeHex;
2585:       PetscInt       fVertex, cVertex;

2587:       if ((sortedIndices[0] == faceVerticesHexSorted[ii+0]) &&
2588:           (sortedIndices[1] == faceVerticesHexSorted[ii+1]) &&
2589:           (sortedIndices[2] == faceVerticesHexSorted[ii+2]) &&
2590:           (sortedIndices[3] == faceVerticesHexSorted[ii+3])) {
2591:         for (fVertex = 0; fVertex < faceSizeHex; ++fVertex) {
2592:           for (cVertex = 0; cVertex < faceSizeHex; ++cVertex) {
2593:             if (indices[cVertex] == faceVerticesHex[ii+fVertex]) {
2594:               faceVertices[fVertex] = origVertices[cVertex];
2595:               break;
2596:             }
2597:           }
2598:         }
2599:         found = PETSC_TRUE;
2600:         break;
2601:       }
2602:     }
2603:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid hex crossface");
2604:     if (posOriented) *posOriented = PETSC_TRUE;
2605:     return(0);
2606:   } else if (cellDim == 3 && numCorners == 10) {
2607:     /* Quadratic tet */
2608:     /* Faces are determined by the first 3 vertices (corners of faces) */
2609:     const PetscInt faceSizeTet = 6;
2610:     PetscInt       sortedIndices[6], i, iFace;
2611:     PetscBool      found                     = PETSC_FALSE;
2612:     PetscInt       faceVerticesTetSorted[24] = {
2613:       0, 1, 2,  6, 7, 8, /* bottom */
2614:       0, 3, 4,  6, 7, 9,  /* front */
2615:       1, 4, 5,  7, 8, 9,  /* right */
2616:       2, 3, 5,  6, 8, 9,  /* left */
2617:     };
2618:     PetscInt       faceVerticesTet[24] = {
2619:       0, 1, 2,  6, 7, 8, /* bottom */
2620:       0, 4, 3,  6, 7, 9,  /* front */
2621:       1, 5, 4,  7, 8, 9,  /* right */
2622:       2, 3, 5,  8, 6, 9,  /* left */
2623:     };

2625:     for (i = 0; i < faceSizeTet; ++i) sortedIndices[i] = indices[i];
2626:     PetscSortInt(faceSizeTet, sortedIndices);
2627:     for (iFace=0; iFace < 4; ++iFace) {
2628:       const PetscInt ii = iFace*faceSizeTet;
2629:       PetscInt       fVertex, cVertex;

2631:       if ((sortedIndices[0] == faceVerticesTetSorted[ii+0]) &&
2632:           (sortedIndices[1] == faceVerticesTetSorted[ii+1]) &&
2633:           (sortedIndices[2] == faceVerticesTetSorted[ii+2]) &&
2634:           (sortedIndices[3] == faceVerticesTetSorted[ii+3])) {
2635:         for (fVertex = 0; fVertex < faceSizeTet; ++fVertex) {
2636:           for (cVertex = 0; cVertex < faceSizeTet; ++cVertex) {
2637:             if (indices[cVertex] == faceVerticesTet[ii+fVertex]) {
2638:               faceVertices[fVertex] = origVertices[cVertex];
2639:               break;
2640:             }
2641:           }
2642:         }
2643:         found = PETSC_TRUE;
2644:         break;
2645:       }
2646:     }
2647:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid tet crossface");
2648:     if (posOriented) *posOriented = PETSC_TRUE;
2649:     return(0);
2650:   } else if (cellDim == 3 && numCorners == 27) {
2651:     /* Quadratic hexes (I hate this)
2652:        A hex is two oriented quads with the normal of the first
2653:        pointing up at the second.

2655:          7---6
2656:         /|  /|
2657:        4---5 |
2658:        | 3-|-2
2659:        |/  |/
2660:        0---1

2662:        Faces are determined by the first 4 vertices (corners of faces) */
2663:     const PetscInt faceSizeQuadHex = 9;
2664:     PetscInt       sortedIndices[9], i, iFace;
2665:     PetscBool      found                         = PETSC_FALSE;
2666:     PetscInt       faceVerticesQuadHexSorted[54] = {
2667:       0, 1, 2, 3,  8, 9, 10, 11,  24, /* bottom */
2668:       4, 5, 6, 7,  12, 13, 14, 15,  25, /* top */
2669:       0, 1, 4, 5,  8, 12, 16, 17,  22, /* front */
2670:       1, 2, 5, 6,  9, 13, 17, 18,  21, /* right */
2671:       2, 3, 6, 7,  10, 14, 18, 19,  23, /* back */
2672:       0, 3, 4, 7,  11, 15, 16, 19,  20, /* left */
2673:     };
2674:     PetscInt       faceVerticesQuadHex[54] = {
2675:       3, 2, 1, 0,  10, 9, 8, 11,  24, /* bottom */
2676:       4, 5, 6, 7,  12, 13, 14, 15,  25, /* top */
2677:       0, 1, 5, 4,  8, 17, 12, 16,  22, /* front */
2678:       1, 2, 6, 5,  9, 18, 13, 17,  21, /* right */
2679:       2, 3, 7, 6,  10, 19, 14, 18,  23, /* back */
2680:       3, 0, 4, 7,  11, 16, 15, 19,  20 /* left */
2681:     };

2683:     for (i = 0; i < faceSizeQuadHex; ++i) sortedIndices[i] = indices[i];
2684:     PetscSortInt(faceSizeQuadHex, sortedIndices);
2685:     for (iFace = 0; iFace < 6; ++iFace) {
2686:       const PetscInt ii = iFace*faceSizeQuadHex;
2687:       PetscInt       fVertex, cVertex;

2689:       if ((sortedIndices[0] == faceVerticesQuadHexSorted[ii+0]) &&
2690:           (sortedIndices[1] == faceVerticesQuadHexSorted[ii+1]) &&
2691:           (sortedIndices[2] == faceVerticesQuadHexSorted[ii+2]) &&
2692:           (sortedIndices[3] == faceVerticesQuadHexSorted[ii+3])) {
2693:         for (fVertex = 0; fVertex < faceSizeQuadHex; ++fVertex) {
2694:           for (cVertex = 0; cVertex < faceSizeQuadHex; ++cVertex) {
2695:             if (indices[cVertex] == faceVerticesQuadHex[ii+fVertex]) {
2696:               faceVertices[fVertex] = origVertices[cVertex];
2697:               break;
2698:             }
2699:           }
2700:         }
2701:         found = PETSC_TRUE;
2702:         break;
2703:       }
2704:     }
2705:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid hex crossface");
2706:     if (posOriented) *posOriented = PETSC_TRUE;
2707:     return(0);
2708:   } else SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Unknown cell type for faceOrientation().");
2709:   if (!posOrient) {
2710:     if (debug) {PetscPrintf(comm, "  Reversing initial face orientation\n");}
2711:     for (f = 0; f < faceSize; ++f) faceVertices[f] = origVertices[faceSize-1 - f];
2712:   } else {
2713:     if (debug) {PetscPrintf(comm, "  Keeping initial face orientation\n");}
2714:     for (f = 0; f < faceSize; ++f) faceVertices[f] = origVertices[f];
2715:   }
2716:   if (posOriented) *posOriented = posOrient;
2717:   return(0);
2718: }

2720: /*@
2721:   DMPlexGetOrientedFace - Given a cell and a face, as a set of vertices, return the oriented face, as a set of vertices,
2722:   in faceVertices. The orientation is such that the face normal points out of the cell

2724:   Not collective

2726:   Input Parameters:
2727: + dm           - The original mesh
2728: . cell         - The cell mesh point
2729: . faceSize     - The number of vertices on the face
2730: . face         - The face vertices
2731: . numCorners   - The number of vertices on the cell
2732: . indices      - Local numbering of face vertices in cell cone
2733: - origVertices - Original face vertices

2735:   Output Parameter:
2736: + faceVertices - The face vertices properly oriented
2737: - posOriented  - PETSC_TRUE if the face was oriented with outward normal

2739:   Level: developer

2741: .seealso: DMPlexGetCone()
2742: @*/
2743: PetscErrorCode DMPlexGetOrientedFace(DM dm, PetscInt cell, PetscInt faceSize, const PetscInt face[], PetscInt numCorners, PetscInt indices[], PetscInt origVertices[], PetscInt faceVertices[], PetscBool *posOriented)
2744: {
2745:   const PetscInt *cone = NULL;
2746:   PetscInt        coneSize, v, f, v2;
2747:   PetscInt        oppositeVertex = -1;
2748:   PetscErrorCode  ierr;

2751:   DMPlexGetConeSize(dm, cell, &coneSize);
2752:   DMPlexGetCone(dm, cell, &cone);
2753:   for (v = 0, v2 = 0; v < coneSize; ++v) {
2754:     PetscBool found = PETSC_FALSE;

2756:     for (f = 0; f < faceSize; ++f) {
2757:       if (face[f] == cone[v]) {
2758:         found = PETSC_TRUE; break;
2759:       }
2760:     }
2761:     if (found) {
2762:       indices[v2]      = v;
2763:       origVertices[v2] = cone[v];
2764:       ++v2;
2765:     } else {
2766:       oppositeVertex = v;
2767:     }
2768:   }
2769:   DMPlexGetFaceOrientation(dm, cell, numCorners, indices, oppositeVertex, origVertices, faceVertices, posOriented);
2770:   return(0);
2771: }

2773: /*
2774:   DMPlexInsertFace_Internal - Puts a face into the mesh

2776:   Not collective

2778:   Input Parameters:
2779:   + dm              - The DMPlex
2780:   . numFaceVertex   - The number of vertices in the face
2781:   . faceVertices    - The vertices in the face for dm
2782:   . subfaceVertices - The vertices in the face for subdm
2783:   . numCorners      - The number of vertices in the cell
2784:   . cell            - A cell in dm containing the face
2785:   . subcell         - A cell in subdm containing the face
2786:   . firstFace       - First face in the mesh
2787:   - newFacePoint    - Next face in the mesh

2789:   Output Parameters:
2790:   . newFacePoint - Contains next face point number on input, updated on output

2792:   Level: developer
2793: */
2794: static PetscErrorCode DMPlexInsertFace_Internal(DM dm, DM subdm, PetscInt numFaceVertices, const PetscInt faceVertices[], const PetscInt subfaceVertices[], PetscInt numCorners, PetscInt cell, PetscInt subcell, PetscInt firstFace, PetscInt *newFacePoint)
2795: {
2796:   MPI_Comm        comm;
2797:   DM_Plex        *submesh = (DM_Plex*) subdm->data;
2798:   const PetscInt *faces;
2799:   PetscInt        numFaces, coneSize;
2800:   PetscErrorCode  ierr;

2803:   PetscObjectGetComm((PetscObject)dm,&comm);
2804:   DMPlexGetConeSize(subdm, subcell, &coneSize);
2805:   if (coneSize != 1) SETERRQ2(comm, PETSC_ERR_ARG_OUTOFRANGE, "Cone size of cell %d is %d != 1", cell, coneSize);
2806: #if 0
2807:   /* Cannot use this because support() has not been constructed yet */
2808:   DMPlexGetJoin(subdm, numFaceVertices, subfaceVertices, &numFaces, &faces);
2809: #else
2810:   {
2811:     PetscInt f;

2813:     numFaces = 0;
2814:     DMGetWorkArray(subdm, 1, MPIU_INT, (void **) &faces);
2815:     for (f = firstFace; f < *newFacePoint; ++f) {
2816:       PetscInt dof, off, d;

2818:       PetscSectionGetDof(submesh->coneSection, f, &dof);
2819:       PetscSectionGetOffset(submesh->coneSection, f, &off);
2820:       /* Yes, I know this is quadratic, but I expect the sizes to be <5 */
2821:       for (d = 0; d < dof; ++d) {
2822:         const PetscInt p = submesh->cones[off+d];
2823:         PetscInt       v;

2825:         for (v = 0; v < numFaceVertices; ++v) {
2826:           if (subfaceVertices[v] == p) break;
2827:         }
2828:         if (v == numFaceVertices) break;
2829:       }
2830:       if (d == dof) {
2831:         numFaces               = 1;
2832:         ((PetscInt*) faces)[0] = f;
2833:       }
2834:     }
2835:   }
2836: #endif
2837:   if (numFaces > 1) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Vertex set had %d faces, not one", numFaces);
2838:   else if (numFaces == 1) {
2839:     /* Add the other cell neighbor for this face */
2840:     DMPlexSetCone(subdm, subcell, faces);
2841:   } else {
2842:     PetscInt *indices, *origVertices, *orientedVertices, *orientedSubVertices, v, ov;
2843:     PetscBool posOriented;

2845:     DMGetWorkArray(subdm, 4*numFaceVertices * sizeof(PetscInt), MPIU_INT, &orientedVertices);
2846:     origVertices        = &orientedVertices[numFaceVertices];
2847:     indices             = &orientedVertices[numFaceVertices*2];
2848:     orientedSubVertices = &orientedVertices[numFaceVertices*3];
2849:     DMPlexGetOrientedFace(dm, cell, numFaceVertices, faceVertices, numCorners, indices, origVertices, orientedVertices, &posOriented);
2850:     /* TODO: I know that routine should return a permutation, not the indices */
2851:     for (v = 0; v < numFaceVertices; ++v) {
2852:       const PetscInt vertex = faceVertices[v], subvertex = subfaceVertices[v];
2853:       for (ov = 0; ov < numFaceVertices; ++ov) {
2854:         if (orientedVertices[ov] == vertex) {
2855:           orientedSubVertices[ov] = subvertex;
2856:           break;
2857:         }
2858:       }
2859:       if (ov == numFaceVertices) SETERRQ1(comm, PETSC_ERR_PLIB, "Could not find face vertex %d in orientated set", vertex);
2860:     }
2861:     DMPlexSetCone(subdm, *newFacePoint, orientedSubVertices);
2862:     DMPlexSetCone(subdm, subcell, newFacePoint);
2863:     DMRestoreWorkArray(subdm, 4*numFaceVertices * sizeof(PetscInt), MPIU_INT, &orientedVertices);
2864:     ++(*newFacePoint);
2865:   }
2866: #if 0
2867:   DMPlexRestoreJoin(subdm, numFaceVertices, subfaceVertices, &numFaces, &faces);
2868: #else
2869:   DMRestoreWorkArray(subdm, 1, MPIU_INT, (void **) &faces);
2870: #endif
2871:   return(0);
2872: }

2874: static PetscErrorCode DMPlexCreateSubmesh_Uninterpolated(DM dm, DMLabel vertexLabel, PetscInt value, DM subdm)
2875: {
2876:   MPI_Comm        comm;
2877:   DMLabel         subpointMap;
2878:   IS              subvertexIS,  subcellIS;
2879:   const PetscInt *subVertices, *subCells;
2880:   PetscInt        numSubVertices, firstSubVertex, numSubCells;
2881:   PetscInt       *subface, maxConeSize, numSubFaces = 0, firstSubFace, newFacePoint, nFV = 0;
2882:   PetscInt        vStart, vEnd, c, f;
2883:   PetscErrorCode  ierr;

2886:   PetscObjectGetComm((PetscObject)dm,&comm);
2887:   /* Create subpointMap which marks the submesh */
2888:   DMLabelCreate(PETSC_COMM_SELF, "subpoint_map", &subpointMap);
2889:   DMPlexSetSubpointMap(subdm, subpointMap);
2890:   DMLabelDestroy(&subpointMap);
2891:   if (vertexLabel) {DMPlexMarkSubmesh_Uninterpolated(dm, vertexLabel, value, subpointMap, &numSubFaces, &nFV, subdm);}
2892:   /* Setup chart */
2893:   DMLabelGetStratumSize(subpointMap, 0, &numSubVertices);
2894:   DMLabelGetStratumSize(subpointMap, 2, &numSubCells);
2895:   DMPlexSetChart(subdm, 0, numSubCells+numSubFaces+numSubVertices);
2896:   DMPlexSetVTKCellHeight(subdm, 1);
2897:   /* Set cone sizes */
2898:   firstSubVertex = numSubCells;
2899:   firstSubFace   = numSubCells+numSubVertices;
2900:   newFacePoint   = firstSubFace;
2901:   DMLabelGetStratumIS(subpointMap, 0, &subvertexIS);
2902:   if (subvertexIS) {ISGetIndices(subvertexIS, &subVertices);}
2903:   DMLabelGetStratumIS(subpointMap, 2, &subcellIS);
2904:   if (subcellIS) {ISGetIndices(subcellIS, &subCells);}
2905:   for (c = 0; c < numSubCells; ++c) {
2906:     DMPlexSetConeSize(subdm, c, 1);
2907:   }
2908:   for (f = firstSubFace; f < firstSubFace+numSubFaces; ++f) {
2909:     DMPlexSetConeSize(subdm, f, nFV);
2910:   }
2911:   DMSetUp(subdm);
2912:   /* Create face cones */
2913:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
2914:   DMPlexGetMaxSizes(dm, &maxConeSize, NULL);
2915:   DMGetWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
2916:   for (c = 0; c < numSubCells; ++c) {
2917:     const PetscInt cell    = subCells[c];
2918:     const PetscInt subcell = c;
2919:     PetscInt      *closure = NULL;
2920:     PetscInt       closureSize, cl, numCorners = 0, faceSize = 0;

2922:     DMPlexGetTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2923:     for (cl = 0; cl < closureSize*2; cl += 2) {
2924:       const PetscInt point = closure[cl];
2925:       PetscInt       subVertex;

2927:       if ((point >= vStart) && (point < vEnd)) {
2928:         ++numCorners;
2929:         PetscFindInt(point, numSubVertices, subVertices, &subVertex);
2930:         if (subVertex >= 0) {
2931:           closure[faceSize] = point;
2932:           subface[faceSize] = firstSubVertex+subVertex;
2933:           ++faceSize;
2934:         }
2935:       }
2936:     }
2937:     if (faceSize > nFV) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Invalid submesh: Too many vertices %d of an element on the surface", faceSize);
2938:     if (faceSize == nFV) {
2939:       DMPlexInsertFace_Internal(dm, subdm, faceSize, closure, subface, numCorners, cell, subcell, firstSubFace, &newFacePoint);
2940:     }
2941:     DMPlexRestoreTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2942:   }
2943:   DMRestoreWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
2944:   DMPlexSymmetrize(subdm);
2945:   DMPlexStratify(subdm);
2946:   /* Build coordinates */
2947:   {
2948:     PetscSection coordSection, subCoordSection;
2949:     Vec          coordinates, subCoordinates;
2950:     PetscScalar *coords, *subCoords;
2951:     PetscInt     numComp, coordSize, v;
2952:     const char  *name;

2954:     DMGetCoordinateSection(dm, &coordSection);
2955:     DMGetCoordinatesLocal(dm, &coordinates);
2956:     DMGetCoordinateSection(subdm, &subCoordSection);
2957:     PetscSectionSetNumFields(subCoordSection, 1);
2958:     PetscSectionGetFieldComponents(coordSection, 0, &numComp);
2959:     PetscSectionSetFieldComponents(subCoordSection, 0, numComp);
2960:     PetscSectionSetChart(subCoordSection, firstSubVertex, firstSubVertex+numSubVertices);
2961:     for (v = 0; v < numSubVertices; ++v) {
2962:       const PetscInt vertex    = subVertices[v];
2963:       const PetscInt subvertex = firstSubVertex+v;
2964:       PetscInt       dof;

2966:       PetscSectionGetDof(coordSection, vertex, &dof);
2967:       PetscSectionSetDof(subCoordSection, subvertex, dof);
2968:       PetscSectionSetFieldDof(subCoordSection, subvertex, 0, dof);
2969:     }
2970:     PetscSectionSetUp(subCoordSection);
2971:     PetscSectionGetStorageSize(subCoordSection, &coordSize);
2972:     VecCreate(PETSC_COMM_SELF, &subCoordinates);
2973:     PetscObjectGetName((PetscObject)coordinates,&name);
2974:     PetscObjectSetName((PetscObject)subCoordinates,name);
2975:     VecSetSizes(subCoordinates, coordSize, PETSC_DETERMINE);
2976:     VecSetType(subCoordinates,VECSTANDARD);
2977:     if (coordSize) {
2978:       VecGetArray(coordinates,    &coords);
2979:       VecGetArray(subCoordinates, &subCoords);
2980:       for (v = 0; v < numSubVertices; ++v) {
2981:         const PetscInt vertex    = subVertices[v];
2982:         const PetscInt subvertex = firstSubVertex+v;
2983:         PetscInt       dof, off, sdof, soff, d;

2985:         PetscSectionGetDof(coordSection, vertex, &dof);
2986:         PetscSectionGetOffset(coordSection, vertex, &off);
2987:         PetscSectionGetDof(subCoordSection, subvertex, &sdof);
2988:         PetscSectionGetOffset(subCoordSection, subvertex, &soff);
2989:         if (dof != sdof) SETERRQ4(comm, PETSC_ERR_PLIB, "Coordinate dimension %d on subvertex %d, vertex %d should be %d", sdof, subvertex, vertex, dof);
2990:         for (d = 0; d < dof; ++d) subCoords[soff+d] = coords[off+d];
2991:       }
2992:       VecRestoreArray(coordinates,    &coords);
2993:       VecRestoreArray(subCoordinates, &subCoords);
2994:     }
2995:     DMSetCoordinatesLocal(subdm, subCoordinates);
2996:     VecDestroy(&subCoordinates);
2997:   }
2998:   /* Cleanup */
2999:   if (subvertexIS) {ISRestoreIndices(subvertexIS, &subVertices);}
3000:   ISDestroy(&subvertexIS);
3001:   if (subcellIS) {ISRestoreIndices(subcellIS, &subCells);}
3002:   ISDestroy(&subcellIS);
3003:   return(0);
3004: }

3006: PETSC_STATIC_INLINE PetscInt DMPlexFilterPoint_Internal(PetscInt point, PetscInt firstSubPoint, PetscInt numSubPoints, const PetscInt subPoints[])
3007: {
3008:   PetscInt       subPoint;

3011:   PetscFindInt(point, numSubPoints, subPoints, &subPoint); if (ierr < 0) return ierr;
3012:   return subPoint < 0 ? subPoint : firstSubPoint+subPoint;
3013: }

3015: static PetscErrorCode DMPlexCreateSubmeshGeneric_Interpolated(DM dm, DMLabel label, PetscInt value, PetscBool markedFaces, PetscBool isCohesive, PetscInt cellHeight, DM subdm)
3016: {
3017:   MPI_Comm         comm;
3018:   DMLabel          subpointMap;
3019:   IS              *subpointIS;
3020:   const PetscInt **subpoints;
3021:   PetscInt        *numSubPoints, *firstSubPoint, *coneNew, *orntNew;
3022:   PetscInt         totSubPoints = 0, maxConeSize, dim, p, d, v;
3023:   PetscMPIInt      rank;
3024:   PetscErrorCode   ierr;

3027:   PetscObjectGetComm((PetscObject)dm,&comm);
3028:   MPI_Comm_rank(comm, &rank);
3029:   /* Create subpointMap which marks the submesh */
3030:   DMLabelCreate(PETSC_COMM_SELF, "subpoint_map", &subpointMap);
3031:   DMPlexSetSubpointMap(subdm, subpointMap);
3032:   if (cellHeight) {
3033:     if (isCohesive) {DMPlexMarkCohesiveSubmesh_Interpolated(dm, label, value, subpointMap, subdm);}
3034:     else            {DMPlexMarkSubmesh_Interpolated(dm, label, value, markedFaces, subpointMap, subdm);}
3035:   } else {
3036:     DMLabel         depth;
3037:     IS              pointIS;
3038:     const PetscInt *points;
3039:     PetscInt        numPoints;

3041:     DMPlexGetDepthLabel(dm, &depth);
3042:     DMLabelGetStratumSize(label, value, &numPoints);
3043:     DMLabelGetStratumIS(label, value, &pointIS);
3044:     ISGetIndices(pointIS, &points);
3045:     for (p = 0; p < numPoints; ++p) {
3046:       PetscInt *closure = NULL;
3047:       PetscInt  closureSize, c, pdim;

3049:       DMPlexGetTransitiveClosure(dm, points[p], PETSC_TRUE, &closureSize, &closure);
3050:       for (c = 0; c < closureSize*2; c += 2) {
3051:         DMLabelGetValue(depth, closure[c], &pdim);
3052:         DMLabelSetValue(subpointMap, closure[c], pdim);
3053:       }
3054:       DMPlexRestoreTransitiveClosure(dm, points[p], PETSC_TRUE, &closureSize, &closure);
3055:     }
3056:     ISRestoreIndices(pointIS, &points);
3057:     ISDestroy(&pointIS);
3058:   }
3059:   /* Setup chart */
3060:   DMGetDimension(dm, &dim);
3061:   PetscMalloc4(dim+1,&numSubPoints,dim+1,&firstSubPoint,dim+1,&subpointIS,dim+1,&subpoints);
3062:   for (d = 0; d <= dim; ++d) {
3063:     DMLabelGetStratumSize(subpointMap, d, &numSubPoints[d]);
3064:     totSubPoints += numSubPoints[d];
3065:   }
3066:   DMPlexSetChart(subdm, 0, totSubPoints);
3067:   DMPlexSetVTKCellHeight(subdm, cellHeight);
3068:   /* Set cone sizes */
3069:   firstSubPoint[dim] = 0;
3070:   firstSubPoint[0]   = firstSubPoint[dim] + numSubPoints[dim];
3071:   if (dim > 1) {firstSubPoint[dim-1] = firstSubPoint[0]     + numSubPoints[0];}
3072:   if (dim > 2) {firstSubPoint[dim-2] = firstSubPoint[dim-1] + numSubPoints[dim-1];}
3073:   for (d = 0; d <= dim; ++d) {
3074:     DMLabelGetStratumIS(subpointMap, d, &subpointIS[d]);
3075:     if (subpointIS[d]) {ISGetIndices(subpointIS[d], &subpoints[d]);}
3076:   }
3077:   /* We do not want this label automatically computed, instead we compute it here */
3078:   DMCreateLabel(subdm, "celltype");
3079:   for (d = 0; d <= dim; ++d) {
3080:     for (p = 0; p < numSubPoints[d]; ++p) {
3081:       const PetscInt  point    = subpoints[d][p];
3082:       const PetscInt  subpoint = firstSubPoint[d] + p;
3083:       const PetscInt *cone;
3084:       PetscInt        coneSize, coneSizeNew, c, val;
3085:       DMPolytopeType  ct;

3087:       DMPlexGetConeSize(dm, point, &coneSize);
3088:       DMPlexSetConeSize(subdm, subpoint, coneSize);
3089:       DMPlexGetCellType(dm, point, &ct);
3090:       DMPlexSetCellType(subdm, subpoint, ct);
3091:       if (cellHeight && (d == dim)) {
3092:         DMPlexGetCone(dm, point, &cone);
3093:         for (c = 0, coneSizeNew = 0; c < coneSize; ++c) {
3094:           DMLabelGetValue(subpointMap, cone[c], &val);
3095:           if (val >= 0) coneSizeNew++;
3096:         }
3097:         DMPlexSetConeSize(subdm, subpoint, coneSizeNew);
3098:         DMPlexSetCellType(subdm, subpoint, DM_POLYTOPE_FV_GHOST);
3099:       }
3100:     }
3101:   }
3102:   DMLabelDestroy(&subpointMap);
3103:   DMSetUp(subdm);
3104:   /* Set cones */
3105:   DMPlexGetMaxSizes(dm, &maxConeSize, NULL);
3106:   PetscMalloc2(maxConeSize,&coneNew,maxConeSize,&orntNew);
3107:   for (d = 0; d <= dim; ++d) {
3108:     for (p = 0; p < numSubPoints[d]; ++p) {
3109:       const PetscInt  point    = subpoints[d][p];
3110:       const PetscInt  subpoint = firstSubPoint[d] + p;
3111:       const PetscInt *cone, *ornt;
3112:       PetscInt        coneSize, subconeSize, coneSizeNew, c, subc, fornt = 0;

3114:       if (d == dim-1) {
3115:         const PetscInt *support, *cone, *ornt;
3116:         PetscInt        supportSize, coneSize, s, subc;

3118:         DMPlexGetSupport(dm, point, &support);
3119:         DMPlexGetSupportSize(dm, point, &supportSize);
3120:         for (s = 0; s < supportSize; ++s) {
3121:           PetscBool isHybrid;

3123:           DMPlexCellIsHybrid_Internal(dm, support[s], &isHybrid);
3124:           if (!isHybrid) continue;
3125:           PetscFindInt(support[s], numSubPoints[d+1], subpoints[d+1], &subc);
3126:           if (subc >= 0) {
3127:             const PetscInt ccell = subpoints[d+1][subc];

3129:             DMPlexGetCone(dm, ccell, &cone);
3130:             DMPlexGetConeSize(dm, ccell, &coneSize);
3131:             DMPlexGetConeOrientation(dm, ccell, &ornt);
3132:             for (c = 0; c < coneSize; ++c) {
3133:               if (cone[c] == point) {
3134:                 fornt = ornt[c];
3135:                 break;
3136:               }
3137:             }
3138:             break;
3139:           }
3140:         }
3141:       }
3142:       DMPlexGetConeSize(dm, point, &coneSize);
3143:       DMPlexGetConeSize(subdm, subpoint, &subconeSize);
3144:       DMPlexGetCone(dm, point, &cone);
3145:       DMPlexGetConeOrientation(dm, point, &ornt);
3146:       for (c = 0, coneSizeNew = 0; c < coneSize; ++c) {
3147:         PetscFindInt(cone[c], numSubPoints[d-1], subpoints[d-1], &subc);
3148:         if (subc >= 0) {
3149:           coneNew[coneSizeNew] = firstSubPoint[d-1] + subc;
3150:           orntNew[coneSizeNew] = ornt[c];
3151:           ++coneSizeNew;
3152:         }
3153:       }
3154:       if (coneSizeNew != subconeSize) SETERRQ2(comm, PETSC_ERR_PLIB, "Number of cone points located %d does not match subcone size %d", coneSizeNew, subconeSize);
3155:       if (fornt < 0) {
3156:         /* This should be replaced by a call to DMPlexReverseCell() */
3157: #if 0
3158:         DMPlexReverseCell(subdm, subpoint);
3159: #else
3160:         for (c = 0; c < coneSizeNew/2 + coneSizeNew%2; ++c) {
3161:           PetscInt faceSize, tmp;

3163:           tmp        = coneNew[c];
3164:           coneNew[c] = coneNew[coneSizeNew-1-c];
3165:           coneNew[coneSizeNew-1-c] = tmp;
3166:           DMPlexGetConeSize(dm, cone[c], &faceSize);
3167:           tmp        = orntNew[c] >= 0 ? -(faceSize-orntNew[c]) : faceSize+orntNew[c];
3168:           orntNew[c] = orntNew[coneSizeNew-1-c] >= 0 ? -(faceSize-orntNew[coneSizeNew-1-c]) : faceSize+orntNew[coneSizeNew-1-c];
3169:           orntNew[coneSizeNew-1-c] = tmp;
3170:         }
3171:       }
3172:       DMPlexSetCone(subdm, subpoint, coneNew);
3173:       DMPlexSetConeOrientation(subdm, subpoint, orntNew);
3174: #endif
3175:     }
3176:   }
3177:   PetscFree2(coneNew,orntNew);
3178:   DMPlexSymmetrize(subdm);
3179:   DMPlexStratify(subdm);
3180:   /* Build coordinates */
3181:   {
3182:     PetscSection coordSection, subCoordSection;
3183:     Vec          coordinates, subCoordinates;
3184:     PetscScalar *coords, *subCoords;
3185:     PetscInt     cdim, numComp, coordSize;
3186:     const char  *name;

3188:     DMGetCoordinateDim(dm, &cdim);
3189:     DMGetCoordinateSection(dm, &coordSection);
3190:     DMGetCoordinatesLocal(dm, &coordinates);
3191:     DMGetCoordinateSection(subdm, &subCoordSection);
3192:     PetscSectionSetNumFields(subCoordSection, 1);
3193:     PetscSectionGetFieldComponents(coordSection, 0, &numComp);
3194:     PetscSectionSetFieldComponents(subCoordSection, 0, numComp);
3195:     PetscSectionSetChart(subCoordSection, firstSubPoint[0], firstSubPoint[0]+numSubPoints[0]);
3196:     for (v = 0; v < numSubPoints[0]; ++v) {
3197:       const PetscInt vertex    = subpoints[0][v];
3198:       const PetscInt subvertex = firstSubPoint[0]+v;
3199:       PetscInt       dof;

3201:       PetscSectionGetDof(coordSection, vertex, &dof);
3202:       PetscSectionSetDof(subCoordSection, subvertex, dof);
3203:       PetscSectionSetFieldDof(subCoordSection, subvertex, 0, dof);
3204:     }
3205:     PetscSectionSetUp(subCoordSection);
3206:     PetscSectionGetStorageSize(subCoordSection, &coordSize);
3207:     VecCreate(PETSC_COMM_SELF, &subCoordinates);
3208:     PetscObjectGetName((PetscObject)coordinates,&name);
3209:     PetscObjectSetName((PetscObject)subCoordinates,name);
3210:     VecSetSizes(subCoordinates, coordSize, PETSC_DETERMINE);
3211:     VecSetBlockSize(subCoordinates, cdim);
3212:     VecSetType(subCoordinates,VECSTANDARD);
3213:     VecGetArray(coordinates,    &coords);
3214:     VecGetArray(subCoordinates, &subCoords);
3215:     for (v = 0; v < numSubPoints[0]; ++v) {
3216:       const PetscInt vertex    = subpoints[0][v];
3217:       const PetscInt subvertex = firstSubPoint[0]+v;
3218:       PetscInt dof, off, sdof, soff, d;

3220:       PetscSectionGetDof(coordSection, vertex, &dof);
3221:       PetscSectionGetOffset(coordSection, vertex, &off);
3222:       PetscSectionGetDof(subCoordSection, subvertex, &sdof);
3223:       PetscSectionGetOffset(subCoordSection, subvertex, &soff);
3224:       if (dof != sdof) SETERRQ4(comm, PETSC_ERR_PLIB, "Coordinate dimension %d on subvertex %d, vertex %d should be %d", sdof, subvertex, vertex, dof);
3225:       for (d = 0; d < dof; ++d) subCoords[soff+d] = coords[off+d];
3226:     }
3227:     VecRestoreArray(coordinates,    &coords);
3228:     VecRestoreArray(subCoordinates, &subCoords);
3229:     DMSetCoordinatesLocal(subdm, subCoordinates);
3230:     VecDestroy(&subCoordinates);
3231:   }
3232:   /* Build SF: We need this complexity because subpoints might not be selected on the owning process */
3233:   {
3234:     PetscSF            sfPoint, sfPointSub;
3235:     IS                 subpIS;
3236:     const PetscSFNode *remotePoints;
3237:     PetscSFNode       *sremotePoints, *newLocalPoints, *newOwners;
3238:     const PetscInt    *localPoints, *subpoints;
3239:     PetscInt          *slocalPoints;
3240:     PetscInt           numRoots, numLeaves, numSubpoints = 0, numSubroots, numSubleaves = 0, l, sl, ll, pStart, pEnd, p;
3241:     PetscMPIInt        rank;

3243:     MPI_Comm_rank(PetscObjectComm((PetscObject) dm), &rank);
3244:     DMGetPointSF(dm, &sfPoint);
3245:     DMGetPointSF(subdm, &sfPointSub);
3246:     DMPlexGetChart(dm, &pStart, &pEnd);
3247:     DMPlexGetChart(subdm, NULL, &numSubroots);
3248:     DMPlexCreateSubpointIS(subdm, &subpIS);
3249:     if (subpIS) {
3250:       ISGetIndices(subpIS, &subpoints);
3251:       ISGetLocalSize(subpIS, &numSubpoints);
3252:     }
3253:     PetscSFGetGraph(sfPoint, &numRoots, &numLeaves, &localPoints, &remotePoints);
3254:     if (numRoots >= 0) {
3255:       PetscMalloc2(pEnd-pStart,&newLocalPoints,numRoots,&newOwners);
3256:       for (p = 0; p < pEnd-pStart; ++p) {
3257:         newLocalPoints[p].rank  = -2;
3258:         newLocalPoints[p].index = -2;
3259:       }
3260:       /* Set subleaves */
3261:       for (l = 0; l < numLeaves; ++l) {
3262:         const PetscInt point    = localPoints[l];
3263:         const PetscInt subpoint = DMPlexFilterPoint_Internal(point, 0, numSubpoints, subpoints);

3265:         if (subpoint < 0) continue;
3266:         newLocalPoints[point-pStart].rank  = rank;
3267:         newLocalPoints[point-pStart].index = subpoint;
3268:         ++numSubleaves;
3269:       }
3270:       /* Must put in owned subpoints */
3271:       for (p = pStart; p < pEnd; ++p) {
3272:         const PetscInt subpoint = DMPlexFilterPoint_Internal(p, 0, numSubpoints, subpoints);

3274:         if (subpoint < 0) {
3275:           newOwners[p-pStart].rank  = -3;
3276:           newOwners[p-pStart].index = -3;
3277:         } else {
3278:           newOwners[p-pStart].rank  = rank;
3279:           newOwners[p-pStart].index = subpoint;
3280:         }
3281:       }
3282:       PetscSFReduceBegin(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3283:       PetscSFReduceEnd(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3284:       PetscSFBcastBegin(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3285:       PetscSFBcastEnd(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3286:       PetscMalloc1(numSubleaves, &slocalPoints);
3287:       PetscMalloc1(numSubleaves, &sremotePoints);
3288:       for (l = 0, sl = 0, ll = 0; l < numLeaves; ++l) {
3289:         const PetscInt point    = localPoints[l];
3290:         const PetscInt subpoint = DMPlexFilterPoint_Internal(point, 0, numSubpoints, subpoints);

3292:         if (subpoint < 0) continue;
3293:         if (newLocalPoints[point].rank == rank) {++ll; continue;}
3294:         slocalPoints[sl]        = subpoint;
3295:         sremotePoints[sl].rank  = newLocalPoints[point].rank;
3296:         sremotePoints[sl].index = newLocalPoints[point].index;
3297:         if (sremotePoints[sl].rank  < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote rank for local point %d", point);
3298:         if (sremotePoints[sl].index < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote subpoint for local point %d", point);
3299:         ++sl;
3300:       }
3301:       if (sl + ll != numSubleaves) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Mismatch in number of subleaves %d + %d != %d", sl, ll, numSubleaves);
3302:       PetscFree2(newLocalPoints,newOwners);
3303:       PetscSFSetGraph(sfPointSub, numSubroots, sl, slocalPoints, PETSC_OWN_POINTER, sremotePoints, PETSC_OWN_POINTER);
3304:     }
3305:     if (subpIS) {
3306:       ISRestoreIndices(subpIS, &subpoints);
3307:       ISDestroy(&subpIS);
3308:     }
3309:   }
3310:   /* Cleanup */
3311:   for (d = 0; d <= dim; ++d) {
3312:     if (subpointIS[d]) {ISRestoreIndices(subpointIS[d], &subpoints[d]);}
3313:     ISDestroy(&subpointIS[d]);
3314:   }
3315:   PetscFree4(numSubPoints,firstSubPoint,subpointIS,subpoints);
3316:   return(0);
3317: }

3319: static PetscErrorCode DMPlexCreateSubmesh_Interpolated(DM dm, DMLabel vertexLabel, PetscInt value, PetscBool markedFaces, DM subdm)
3320: {

3324:   DMPlexCreateSubmeshGeneric_Interpolated(dm, vertexLabel, value, markedFaces, PETSC_FALSE, 1, subdm);
3325:   return(0);
3326: }

3328: /*@
3329:   DMPlexCreateSubmesh - Extract a hypersurface from the mesh using vertices defined by a label

3331:   Input Parameters:
3332: + dm           - The original mesh
3333: . vertexLabel  - The DMLabel marking points contained in the surface
3334: . value        - The label value to use
3335: - markedFaces  - PETSC_TRUE if surface faces are marked in addition to vertices, PETSC_FALSE if only vertices are marked

3337:   Output Parameter:
3338: . subdm - The surface mesh

3340:   Note: This function produces a DMLabel mapping original points in the submesh to their depth. This can be obtained using DMPlexGetSubpointMap().

3342:   Level: developer

3344: .seealso: DMPlexGetSubpointMap(), DMGetLabel(), DMLabelSetValue()
3345: @*/
3346: PetscErrorCode DMPlexCreateSubmesh(DM dm, DMLabel vertexLabel, PetscInt value, PetscBool markedFaces, DM *subdm)
3347: {
3348:   DMPlexInterpolatedFlag interpolated;
3349:   PetscInt       dim, cdim;

3355:   DMGetDimension(dm, &dim);
3356:   DMCreate(PetscObjectComm((PetscObject)dm), subdm);
3357:   DMSetType(*subdm, DMPLEX);
3358:   DMSetDimension(*subdm, dim-1);
3359:   DMGetCoordinateDim(dm, &cdim);
3360:   DMSetCoordinateDim(*subdm, cdim);
3361:   DMPlexIsInterpolated(dm, &interpolated);
3362:   if (interpolated == DMPLEX_INTERPOLATED_PARTIAL) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Not for partially interpolated meshes");
3363:   if (interpolated) {
3364:     DMPlexCreateSubmesh_Interpolated(dm, vertexLabel, value, markedFaces, *subdm);
3365:   } else {
3366:     DMPlexCreateSubmesh_Uninterpolated(dm, vertexLabel, value, *subdm);
3367:   }
3368:   return(0);
3369: }

3371: static PetscErrorCode DMPlexCreateCohesiveSubmesh_Uninterpolated(DM dm, PetscBool hasLagrange, const char label[], PetscInt value, DM subdm)
3372: {
3373:   MPI_Comm        comm;
3374:   DMLabel         subpointMap;
3375:   IS              subvertexIS;
3376:   const PetscInt *subVertices;
3377:   PetscInt        numSubVertices, firstSubVertex, numSubCells, *subCells = NULL;
3378:   PetscInt       *subface, maxConeSize, numSubFaces, firstSubFace, newFacePoint, nFV;
3379:   PetscInt        c, f;
3380:   PetscErrorCode  ierr;

3383:   PetscObjectGetComm((PetscObject)dm, &comm);
3384:   /* Create subpointMap which marks the submesh */
3385:   DMLabelCreate(PETSC_COMM_SELF, "subpoint_map", &subpointMap);
3386:   DMPlexSetSubpointMap(subdm, subpointMap);
3387:   DMLabelDestroy(&subpointMap);
3388:   DMPlexMarkCohesiveSubmesh_Uninterpolated(dm, hasLagrange, label, value, subpointMap, &numSubFaces, &nFV, &subCells, subdm);
3389:   /* Setup chart */
3390:   DMLabelGetStratumSize(subpointMap, 0, &numSubVertices);
3391:   DMLabelGetStratumSize(subpointMap, 2, &numSubCells);
3392:   DMPlexSetChart(subdm, 0, numSubCells+numSubFaces+numSubVertices);
3393:   DMPlexSetVTKCellHeight(subdm, 1);
3394:   /* Set cone sizes */
3395:   firstSubVertex = numSubCells;
3396:   firstSubFace   = numSubCells+numSubVertices;
3397:   newFacePoint   = firstSubFace;
3398:   DMLabelGetStratumIS(subpointMap, 0, &subvertexIS);
3399:   if (subvertexIS) {ISGetIndices(subvertexIS, &subVertices);}
3400:   for (c = 0; c < numSubCells; ++c) {
3401:     DMPlexSetConeSize(subdm, c, 1);
3402:   }
3403:   for (f = firstSubFace; f < firstSubFace+numSubFaces; ++f) {
3404:     DMPlexSetConeSize(subdm, f, nFV);
3405:   }
3406:   DMSetUp(subdm);
3407:   /* Create face cones */
3408:   DMPlexGetMaxSizes(dm, &maxConeSize, NULL);
3409:   DMGetWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
3410:   for (c = 0; c < numSubCells; ++c) {
3411:     const PetscInt  cell    = subCells[c];
3412:     const PetscInt  subcell = c;
3413:     const PetscInt *cone, *cells;
3414:     PetscBool       isHybrid;
3415:     PetscInt        numCells, subVertex, p, v;

3417:     DMPlexCellIsHybrid_Internal(dm, cell, &isHybrid);
3418:     if (!isHybrid) continue;
3419:     DMPlexGetCone(dm, cell, &cone);
3420:     for (v = 0; v < nFV; ++v) {
3421:       PetscFindInt(cone[v], numSubVertices, subVertices, &subVertex);
3422:       subface[v] = firstSubVertex+subVertex;
3423:     }
3424:     DMPlexSetCone(subdm, newFacePoint, subface);
3425:     DMPlexSetCone(subdm, subcell, &newFacePoint);
3426:     DMPlexGetJoin(dm, nFV, cone, &numCells, &cells);
3427:     /* Not true in parallel
3428:     if (numCells != 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive cells should separate two cells"); */
3429:     for (p = 0; p < numCells; ++p) {
3430:       PetscInt  negsubcell;
3431:       PetscBool isHybrid;

3433:       DMPlexCellIsHybrid_Internal(dm, cells[p], &isHybrid);
3434:       if (isHybrid) continue;
3435:       /* I know this is a crap search */
3436:       for (negsubcell = 0; negsubcell < numSubCells; ++negsubcell) {
3437:         if (subCells[negsubcell] == cells[p]) break;
3438:       }
3439:       if (negsubcell == numSubCells) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not find negative face neighbor for cohesive cell %d", cell);
3440:       DMPlexSetCone(subdm, negsubcell, &newFacePoint);
3441:     }
3442:     DMPlexRestoreJoin(dm, nFV, cone, &numCells, &cells);
3443:     ++newFacePoint;
3444:   }
3445:   DMRestoreWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
3446:   DMPlexSymmetrize(subdm);
3447:   DMPlexStratify(subdm);
3448:   /* Build coordinates */
3449:   {
3450:     PetscSection coordSection, subCoordSection;
3451:     Vec          coordinates, subCoordinates;
3452:     PetscScalar *coords, *subCoords;
3453:     PetscInt     cdim, numComp, coordSize, v;
3454:     const char  *name;

3456:     DMGetCoordinateDim(dm, &cdim);
3457:     DMGetCoordinateSection(dm, &coordSection);
3458:     DMGetCoordinatesLocal(dm, &coordinates);
3459:     DMGetCoordinateSection(subdm, &subCoordSection);
3460:     PetscSectionSetNumFields(subCoordSection, 1);
3461:     PetscSectionGetFieldComponents(coordSection, 0, &numComp);
3462:     PetscSectionSetFieldComponents(subCoordSection, 0, numComp);
3463:     PetscSectionSetChart(subCoordSection, firstSubVertex, firstSubVertex+numSubVertices);
3464:     for (v = 0; v < numSubVertices; ++v) {
3465:       const PetscInt vertex    = subVertices[v];
3466:       const PetscInt subvertex = firstSubVertex+v;
3467:       PetscInt       dof;

3469:       PetscSectionGetDof(coordSection, vertex, &dof);
3470:       PetscSectionSetDof(subCoordSection, subvertex, dof);
3471:       PetscSectionSetFieldDof(subCoordSection, subvertex, 0, dof);
3472:     }
3473:     PetscSectionSetUp(subCoordSection);
3474:     PetscSectionGetStorageSize(subCoordSection, &coordSize);
3475:     VecCreate(PETSC_COMM_SELF, &subCoordinates);
3476:     PetscObjectGetName((PetscObject)coordinates,&name);
3477:     PetscObjectSetName((PetscObject)subCoordinates,name);
3478:     VecSetSizes(subCoordinates, coordSize, PETSC_DETERMINE);
3479:     VecSetBlockSize(subCoordinates, cdim);
3480:     VecSetType(subCoordinates,VECSTANDARD);
3481:     VecGetArray(coordinates,    &coords);
3482:     VecGetArray(subCoordinates, &subCoords);
3483:     for (v = 0; v < numSubVertices; ++v) {
3484:       const PetscInt vertex    = subVertices[v];
3485:       const PetscInt subvertex = firstSubVertex+v;
3486:       PetscInt       dof, off, sdof, soff, d;

3488:       PetscSectionGetDof(coordSection, vertex, &dof);
3489:       PetscSectionGetOffset(coordSection, vertex, &off);
3490:       PetscSectionGetDof(subCoordSection, subvertex, &sdof);
3491:       PetscSectionGetOffset(subCoordSection, subvertex, &soff);
3492:       if (dof != sdof) SETERRQ4(comm, PETSC_ERR_PLIB, "Coordinate dimension %d on subvertex %d, vertex %d should be %d", sdof, subvertex, vertex, dof);
3493:       for (d = 0; d < dof; ++d) subCoords[soff+d] = coords[off+d];
3494:     }
3495:     VecRestoreArray(coordinates,    &coords);
3496:     VecRestoreArray(subCoordinates, &subCoords);
3497:     DMSetCoordinatesLocal(subdm, subCoordinates);
3498:     VecDestroy(&subCoordinates);
3499:   }
3500:   /* Build SF */
3501:   CHKMEMQ;
3502:   {
3503:     PetscSF            sfPoint, sfPointSub;
3504:     const PetscSFNode *remotePoints;
3505:     PetscSFNode       *sremotePoints, *newLocalPoints, *newOwners;
3506:     const PetscInt    *localPoints;
3507:     PetscInt          *slocalPoints;
3508:     PetscInt           numRoots, numLeaves, numSubRoots = numSubCells+numSubFaces+numSubVertices, numSubLeaves = 0, l, sl, ll, pStart, pEnd, p, vStart, vEnd;
3509:     PetscMPIInt        rank;

3511:     MPI_Comm_rank(PetscObjectComm((PetscObject) dm), &rank);
3512:     DMGetPointSF(dm, &sfPoint);
3513:     DMGetPointSF(subdm, &sfPointSub);
3514:     DMPlexGetChart(dm, &pStart, &pEnd);
3515:     DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
3516:     PetscSFGetGraph(sfPoint, &numRoots, &numLeaves, &localPoints, &remotePoints);
3517:     if (numRoots >= 0) {
3518:       /* Only vertices should be shared */
3519:       PetscMalloc2(pEnd-pStart,&newLocalPoints,numRoots,&newOwners);
3520:       for (p = 0; p < pEnd-pStart; ++p) {
3521:         newLocalPoints[p].rank  = -2;
3522:         newLocalPoints[p].index = -2;
3523:       }
3524:       /* Set subleaves */
3525:       for (l = 0; l < numLeaves; ++l) {
3526:         const PetscInt point    = localPoints[l];
3527:         const PetscInt subPoint = DMPlexFilterPoint_Internal(point, firstSubVertex, numSubVertices, subVertices);

3529:         if ((point < vStart) && (point >= vEnd)) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Should not be mapping anything but vertices, %d", point);
3530:         if (subPoint < 0) continue;
3531:         newLocalPoints[point-pStart].rank  = rank;
3532:         newLocalPoints[point-pStart].index = subPoint;
3533:         ++numSubLeaves;
3534:       }
3535:       /* Must put in owned subpoints */
3536:       for (p = pStart; p < pEnd; ++p) {
3537:         const PetscInt subPoint = DMPlexFilterPoint_Internal(p, firstSubVertex, numSubVertices, subVertices);

3539:         if (subPoint < 0) {
3540:           newOwners[p-pStart].rank  = -3;
3541:           newOwners[p-pStart].index = -3;
3542:         } else {
3543:           newOwners[p-pStart].rank  = rank;
3544:           newOwners[p-pStart].index = subPoint;
3545:         }
3546:       }
3547:       PetscSFReduceBegin(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3548:       PetscSFReduceEnd(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3549:       PetscSFBcastBegin(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3550:       PetscSFBcastEnd(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3551:       PetscMalloc1(numSubLeaves,    &slocalPoints);
3552:       PetscMalloc1(numSubLeaves, &sremotePoints);
3553:       for (l = 0, sl = 0, ll = 0; l < numLeaves; ++l) {
3554:         const PetscInt point    = localPoints[l];
3555:         const PetscInt subPoint = DMPlexFilterPoint_Internal(point, firstSubVertex, numSubVertices, subVertices);

3557:         if (subPoint < 0) continue;
3558:         if (newLocalPoints[point].rank == rank) {++ll; continue;}
3559:         slocalPoints[sl]        = subPoint;
3560:         sremotePoints[sl].rank  = newLocalPoints[point].rank;
3561:         sremotePoints[sl].index = newLocalPoints[point].index;
3562:         if (sremotePoints[sl].rank  < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote rank for local point %d", point);
3563:         if (sremotePoints[sl].index < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote subpoint for local point %d", point);
3564:         ++sl;
3565:       }
3566:       PetscFree2(newLocalPoints,newOwners);
3567:       if (sl + ll != numSubLeaves) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Mismatch in number of subleaves %d + %d != %d", sl, ll, numSubLeaves);
3568:       PetscSFSetGraph(sfPointSub, numSubRoots, sl, slocalPoints, PETSC_OWN_POINTER, sremotePoints, PETSC_OWN_POINTER);
3569:     }
3570:   }
3571:   CHKMEMQ;
3572:   /* Cleanup */
3573:   if (subvertexIS) {ISRestoreIndices(subvertexIS, &subVertices);}
3574:   ISDestroy(&subvertexIS);
3575:   PetscFree(subCells);
3576:   return(0);
3577: }

3579: static PetscErrorCode DMPlexCreateCohesiveSubmesh_Interpolated(DM dm, const char labelname[], PetscInt value, DM subdm)
3580: {
3581:   DMLabel        label = NULL;

3585:   if (labelname) {DMGetLabel(dm, labelname, &label);}
3586:   DMPlexCreateSubmeshGeneric_Interpolated(dm, label, value, PETSC_FALSE, PETSC_TRUE, 1, subdm);
3587:   return(0);
3588: }

3590: /*@C
3591:   DMPlexCreateCohesiveSubmesh - Extract from a mesh with cohesive cells the hypersurface defined by one face of the cells. Optionally, a Label an be given to restrict the cells.

3593:   Input Parameters:
3594: + dm          - The original mesh
3595: . hasLagrange - The mesh has Lagrange unknowns in the cohesive cells
3596: . label       - A label name, or NULL
3597: - value  - A label value

3599:   Output Parameter:
3600: . subdm - The surface mesh

3602:   Note: This function produces a DMLabel mapping original points in the submesh to their depth. This can be obtained using DMPlexGetSubpointMap().

3604:   Level: developer

3606: .seealso: DMPlexGetSubpointMap(), DMPlexCreateSubmesh()
3607: @*/
3608: PetscErrorCode DMPlexCreateCohesiveSubmesh(DM dm, PetscBool hasLagrange, const char label[], PetscInt value, DM *subdm)
3609: {
3610:   PetscInt       dim, cdim, depth;

3616:   DMGetDimension(dm, &dim);
3617:   DMPlexGetDepth(dm, &depth);
3618:   DMCreate(PetscObjectComm((PetscObject)dm), subdm);
3619:   DMSetType(*subdm, DMPLEX);
3620:   DMSetDimension(*subdm, dim-1);
3621:   DMGetCoordinateDim(dm, &cdim);
3622:   DMSetCoordinateDim(*subdm, cdim);
3623:   if (depth == dim) {
3624:     DMPlexCreateCohesiveSubmesh_Interpolated(dm, label, value, *subdm);
3625:   } else {
3626:     DMPlexCreateCohesiveSubmesh_Uninterpolated(dm, hasLagrange, label, value, *subdm);
3627:   }
3628:   return(0);
3629: }

3631: /*@
3632:   DMPlexFilter - Extract a subset of mesh cells defined by a label as a separate mesh

3634:   Input Parameters:
3635: + dm        - The original mesh
3636: . cellLabel - The DMLabel marking cells contained in the new mesh
3637: - value     - The label value to use

3639:   Output Parameter:
3640: . subdm - The new mesh

3642:   Note: This function produces a DMLabel mapping original points in the submesh to their depth. This can be obtained using DMPlexGetSubpointMap().

3644:   Level: developer

3646: .seealso: DMPlexGetSubpointMap(), DMGetLabel(), DMLabelSetValue()
3647: @*/
3648: PetscErrorCode DMPlexFilter(DM dm, DMLabel cellLabel, PetscInt value, DM *subdm)
3649: {
3650:   PetscInt       dim;

3656:   DMGetDimension(dm, &dim);
3657:   DMCreate(PetscObjectComm((PetscObject) dm), subdm);
3658:   DMSetType(*subdm, DMPLEX);
3659:   DMSetDimension(*subdm, dim);
3660:   /* Extract submesh in place, could be empty on some procs, could have inconsistency if procs do not both extract a shared cell */
3661:   DMPlexCreateSubmeshGeneric_Interpolated(dm, cellLabel, value, PETSC_FALSE, PETSC_FALSE, 0, *subdm);
3662:   return(0);
3663: }

3665: /*@
3666:   DMPlexGetSubpointMap - Returns a DMLabel with point dimension as values

3668:   Input Parameter:
3669: . dm - The submesh DM

3671:   Output Parameter:
3672: . subpointMap - The DMLabel of all the points from the original mesh in this submesh, or NULL if this is not a submesh

3674:   Level: developer

3676: .seealso: DMPlexCreateSubmesh(), DMPlexCreateSubpointIS()
3677: @*/
3678: PetscErrorCode DMPlexGetSubpointMap(DM dm, DMLabel *subpointMap)
3679: {
3683:   *subpointMap = ((DM_Plex*) dm->data)->subpointMap;
3684:   return(0);
3685: }

3687: /*@
3688:   DMPlexSetSubpointMap - Sets the DMLabel with point dimension as values

3690:   Input Parameters:
3691: + dm - The submesh DM
3692: - subpointMap - The DMLabel of all the points from the original mesh in this submesh

3694:   Note: Should normally not be called by the user, since it is set in DMPlexCreateSubmesh()

3696:   Level: developer

3698: .seealso: DMPlexCreateSubmesh(), DMPlexCreateSubpointIS()
3699: @*/
3700: PetscErrorCode DMPlexSetSubpointMap(DM dm, DMLabel subpointMap)
3701: {
3702:   DM_Plex       *mesh = (DM_Plex *) dm->data;
3703:   DMLabel        tmp;

3708:   tmp  = mesh->subpointMap;
3709:   mesh->subpointMap = subpointMap;
3710:   PetscObjectReference((PetscObject) mesh->subpointMap);
3711:   DMLabelDestroy(&tmp);
3712:   return(0);
3713: }

3715: /*@
3716:   DMPlexCreateSubpointIS - Creates an IS covering the entire subdm chart with the original points as data

3718:   Input Parameter:
3719: . dm - The submesh DM

3721:   Output Parameter:
3722: . subpointIS - The IS of all the points from the original mesh in this submesh, or NULL if this is not a submesh

3724:   Note: This IS is guaranteed to be sorted by the construction of the submesh

3726:   Level: developer

3728: .seealso: DMPlexCreateSubmesh(), DMPlexGetSubpointMap()
3729: @*/
3730: PetscErrorCode DMPlexCreateSubpointIS(DM dm, IS *subpointIS)
3731: {
3732:   MPI_Comm        comm;
3733:   DMLabel         subpointMap;
3734:   IS              is;
3735:   const PetscInt *opoints;
3736:   PetscInt       *points, *depths;
3737:   PetscInt        depth, depStart, depEnd, d, pStart, pEnd, p, n, off;
3738:   PetscErrorCode  ierr;

3743:   PetscObjectGetComm((PetscObject)dm,&comm);
3744:   *subpointIS = NULL;
3745:   DMPlexGetSubpointMap(dm, &subpointMap);
3746:   DMPlexGetDepth(dm, &depth);
3747:   if (subpointMap && depth >= 0) {
3748:     DMPlexGetChart(dm, &pStart, &pEnd);
3749:     if (pStart) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Submeshes must start the point numbering at 0, not %d", pStart);
3750:     DMGetWorkArray(dm, depth+1, MPIU_INT, &depths);
3751:     depths[0] = depth;
3752:     depths[1] = 0;
3753:     for(d = 2; d <= depth; ++d) {depths[d] = depth+1 - d;}
3754:     PetscMalloc1(pEnd, &points);
3755:     for(d = 0, off = 0; d <= depth; ++d) {
3756:       const PetscInt dep = depths[d];

3758:       DMPlexGetDepthStratum(dm, dep, &depStart, &depEnd);
3759:       DMLabelGetStratumSize(subpointMap, dep, &n);
3760:       if (((d < 2) && (depth > 1)) || (d == 1)) { /* Only check vertices and cells for now since the map is broken for others */
3761:         if (n != depEnd-depStart) SETERRQ3(comm, PETSC_ERR_ARG_WRONG, "The number of mapped submesh points %d at depth %d should be %d", n, dep, depEnd-depStart);
3762:       } else {
3763:         if (!n) {
3764:           if (d == 0) {
3765:             /* Missing cells */
3766:             for(p = 0; p < depEnd-depStart; ++p, ++off) points[off] = -1;
3767:           } else {
3768:             /* Missing faces */
3769:             for(p = 0; p < depEnd-depStart; ++p, ++off) points[off] = PETSC_MAX_INT;
3770:           }
3771:         }
3772:       }
3773:       if (n) {
3774:         DMLabelGetStratumIS(subpointMap, dep, &is);
3775:         ISGetIndices(is, &opoints);
3776:         for(p = 0; p < n; ++p, ++off) points[off] = opoints[p];
3777:         ISRestoreIndices(is, &opoints);
3778:         ISDestroy(&is);
3779:       }
3780:     }
3781:     DMRestoreWorkArray(dm, depth+1, MPIU_INT, &depths);
3782:     if (off != pEnd) SETERRQ2(comm, PETSC_ERR_ARG_WRONG, "The number of mapped submesh points %d should be %d", off, pEnd);
3783:     ISCreateGeneral(PETSC_COMM_SELF, pEnd, points, PETSC_OWN_POINTER, subpointIS);
3784:   }
3785:   return(0);
3786: }

3788: /*@
3789:   DMGetEnclosureRelation - Get the relationship between dmA and dmB

3791:   Input Parameters:
3792: + dmA - The first DM
3793: - dmB - The second DM

3795:   Output Parameter:
3796: . rel - The relation of dmA to dmB

3798:   Level: intermediate

3800: .seealso: DMPlexGetEnclosurePoint()
3801: @*/
3802: PetscErrorCode DMGetEnclosureRelation(DM dmA, DM dmB, DMEnclosureType *rel)
3803: {
3804:   DM             plexA, plexB, sdm;
3805:   DMLabel        spmap;
3806:   PetscInt       pStartA, pEndA, pStartB, pEndB, NpA, NpB;

3811:   *rel = DM_ENC_NONE;
3812:   if (!dmA || !dmB) return(0);
3815:   if (dmA == dmB) {*rel = DM_ENC_EQUALITY; return(0);}
3816:   DMConvert(dmA, DMPLEX, &plexA);
3817:   DMConvert(dmB, DMPLEX, &plexB);
3818:   DMPlexGetChart(plexA, &pStartA, &pEndA);
3819:   DMPlexGetChart(plexB, &pStartB, &pEndB);
3820:   /* Assumption 1: subDMs have smaller charts than the DMs that they originate from
3821:     - The degenerate case of a subdomain which includes all of the domain on some process can be treated as equality */
3822:   if ((pStartA == pStartB) && (pEndA == pEndB)) {
3823:     *rel = DM_ENC_EQUALITY;
3824:     goto end;
3825:   }
3826:   NpA = pEndA - pStartA;
3827:   NpB = pEndB - pStartB;
3828:   if (NpA == NpB) goto end;
3829:   sdm = NpA > NpB ? plexB : plexA; /* The other is the original, enclosing dm */
3830:   DMPlexGetSubpointMap(sdm, &spmap);
3831:   if (!spmap) goto end;
3832:   /* TODO Check the space mapped to by subpointMap is same size as dm */
3833:   if (NpA > NpB) {
3834:     *rel = DM_ENC_SUPERMESH;
3835:   } else {
3836:     *rel = DM_ENC_SUBMESH;
3837:   }
3838:   end:
3839:   DMDestroy(&plexA);
3840:   DMDestroy(&plexB);
3841:   return(0);
3842: }

3844: /*@
3845:   DMGetEnclosurePoint - Get the point pA in dmA which corresponds to the point pB in dmB

3847:   Input Parameters:
3848: + dmA   - The first DM
3849: . dmB   - The second DM
3850: . etype - The type of enclosure relation that dmA has to dmB
3851: - pB    - A point of dmB

3853:   Output Parameter:
3854: . pA    - The corresponding point of dmA

3856:   Level: intermediate

3858: .seealso: DMGetEnclosureRelation()
3859: @*/
3860: PetscErrorCode DMGetEnclosurePoint(DM dmA, DM dmB, DMEnclosureType etype, PetscInt pB, PetscInt *pA)
3861: {
3862:   DM              sdm;
3863:   DMLabel         spmap;
3864:   IS              subpointIS;
3865:   const PetscInt *subpoints;
3866:   PetscInt        numSubpoints;
3867:   PetscErrorCode  ierr;

3870:   /* TODO Cache the IS, making it look like an index */
3871:   switch (etype) {
3872:     case DM_ENC_SUPERMESH:
3873:     sdm  = dmB;
3874:     DMPlexGetSubpointMap(sdm, &spmap);
3875:     DMPlexCreateSubpointIS(sdm, &subpointIS);
3876:     ISGetIndices(subpointIS, &subpoints);
3877:     *pA  = subpoints[pB];
3878:     ISRestoreIndices(subpointIS, &subpoints);
3879:     ISDestroy(&subpointIS);
3880:     break;
3881:     case DM_ENC_SUBMESH:
3882:     sdm  = dmA;
3883:     DMPlexGetSubpointMap(sdm, &spmap);
3884:     DMPlexCreateSubpointIS(sdm, &subpointIS);
3885:     ISGetLocalSize(subpointIS, &numSubpoints);
3886:     ISGetIndices(subpointIS, &subpoints);
3887:     PetscFindInt(pB, numSubpoints, subpoints, pA);
3888:     if (*pA < 0) {
3889:       DMViewFromOptions(dmA, NULL, "-dm_enc_A_view");
3890:       DMViewFromOptions(dmB, NULL, "-dm_enc_B_view");
3891:       SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Point %d not found in submesh", pB);
3892:     }
3893:     ISRestoreIndices(subpointIS, &subpoints);
3894:     ISDestroy(&subpointIS);
3895:     break;
3896:     case DM_ENC_EQUALITY:
3897:     case DM_ENC_NONE:
3898:     *pA = pB;break;
3899:     case DM_ENC_UNKNOWN:
3900:     {
3901:       DMEnclosureType enc;

3903:       DMGetEnclosureRelation(dmA, dmB, &enc);
3904:       DMGetEnclosurePoint(dmA, dmB, enc, pB, pA);
3905:     }
3906:     break;
3907:     default: SETERRQ1(PetscObjectComm((PetscObject) dmA), PETSC_ERR_ARG_OUTOFRANGE, "Invalid enclosure type %d", (int) etype);
3908:   }
3909:   return(0);
3910: }