Actual source code: plexsubmesh.c

petsc-master 2020-07-04
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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:     DMPlexGetSubpointIS(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) return(0);
1742:   ISGetLocalSize(dimIS, &numPoints);
1743:   ISGetIndices(dimIS, &points);
1744:   for (p = 0; p < numPoints; ++p) { /* Loop over fault faces */
1745:     const PetscInt *support;
1746:     PetscInt        supportSize, s;

1748:     DMPlexGetSupportSize(dm, points[p], &supportSize);
1749: #if 0
1750:     if (supportSize != 2) {
1751:       const PetscInt *lp;
1752:       PetscInt        Nlp, pind;

1754:       /* Check that for a cell with a single support face, that face is in the SF */
1755:       /*   THis check only works for the remote side. We would need root side information */
1756:       PetscSFGetGraph(dm->sf, NULL, &Nlp, &lp, NULL);
1757:       PetscFindInt(points[p], Nlp, lp, &pind);
1758:       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);
1759:     }
1760: #endif
1761:     DMPlexGetSupport(dm, points[p], &support);
1762:     for (s = 0; s < supportSize; ++s) {
1763:       const PetscInt *cone;
1764:       PetscInt        coneSize, c;
1765:       PetscBool       pos;

1767:       GetSurfaceSide_Static(dm, subdm, numSubpoints, subpoints, support[s], points[p], &pos);
1768:       if (pos) {DMLabelSetValue(label, support[s],  rev*(shift+dim));}
1769:       else     {DMLabelSetValue(label, support[s], -rev*(shift+dim));}
1770:       if (rev < 0) pos = !pos ? PETSC_TRUE : PETSC_FALSE;
1771:       /* Put faces touching the fault in the label */
1772:       DMPlexGetConeSize(dm, support[s], &coneSize);
1773:       DMPlexGetCone(dm, support[s], &cone);
1774:       for (c = 0; c < coneSize; ++c) {
1775:         const PetscInt point = cone[c];

1777:         DMLabelGetValue(label, point, &val);
1778:         if (val == -1) {
1779:           PetscInt *closure = NULL;
1780:           PetscInt  closureSize, cl;

1782:           DMPlexGetTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
1783:           for (cl = 0; cl < closureSize*2; cl += 2) {
1784:             const PetscInt clp  = closure[cl];
1785:             PetscInt       bval = -1;

1787:             DMLabelGetValue(label, clp, &val);
1788:             if (blabel) {DMLabelGetValue(blabel, clp, &bval);}
1789:             if ((val >= 0) && (val < dim-1) && (bval < 0)) {
1790:               DMLabelSetValue(label, point, pos == PETSC_TRUE ? shift+dim-1 : -(shift+dim-1));
1791:               break;
1792:             }
1793:           }
1794:           DMPlexRestoreTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
1795:         }
1796:       }
1797:     }
1798:   }
1799:   ISRestoreIndices(dimIS, &points);
1800:   ISDestroy(&dimIS);
1801:   if (subpointIS) {ISRestoreIndices(subpointIS, &subpoints);}
1802:   /* Mark boundary points as unsplit */
1803:   if (blabel) {
1804:     DMLabelGetStratumIS(blabel, 1, &dimIS);
1805:     ISGetLocalSize(dimIS, &numPoints);
1806:     ISGetIndices(dimIS, &points);
1807:     for (p = 0; p < numPoints; ++p) {
1808:       const PetscInt point = points[p];
1809:       PetscInt       val, bval;

1811:       DMLabelGetValue(blabel, point, &bval);
1812:       if (bval >= 0) {
1813:         DMLabelGetValue(label, point, &val);
1814:         if ((val < 0) || (val > dim)) {
1815:           /* This could be a point added from splitting a vertex on an adjacent fault, otherwise its just wrong */
1816:           DMLabelClearValue(blabel, point, bval);
1817:         }
1818:       }
1819:     }
1820:     for (p = 0; p < numPoints; ++p) {
1821:       const PetscInt point = points[p];
1822:       PetscInt       val, bval;

1824:       DMLabelGetValue(blabel, point, &bval);
1825:       if (bval >= 0) {
1826:         const PetscInt *cone,    *support;
1827:         PetscInt        coneSize, supportSize, s, valA, valB, valE;

1829:         /* Mark as unsplit */
1830:         DMLabelGetValue(label, point, &val);
1831:         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);
1832:         DMLabelClearValue(label, point, val);
1833:         DMLabelSetValue(label, point, shift2+val);
1834:         /* Check for cross-edge
1835:              A cross-edge has endpoints which are both on the boundary of the surface, but the edge itself is not. */
1836:         if (val != 0) continue;
1837:         DMPlexGetSupport(dm, point, &support);
1838:         DMPlexGetSupportSize(dm, point, &supportSize);
1839:         for (s = 0; s < supportSize; ++s) {
1840:           DMPlexGetCone(dm, support[s], &cone);
1841:           DMPlexGetConeSize(dm, support[s], &coneSize);
1842:           if (coneSize != 2) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Edge %D has %D vertices != 2", support[s], coneSize);
1843:           DMLabelGetValue(blabel, cone[0], &valA);
1844:           DMLabelGetValue(blabel, cone[1], &valB);
1845:           DMLabelGetValue(blabel, support[s], &valE);
1846:           if ((valE < 0) && (valA >= 0) && (valB >= 0) && (cone[0] != cone[1])) {DMLabelSetValue(blabel, support[s], 2);}
1847:         }
1848:       }
1849:     }
1850:     ISRestoreIndices(dimIS, &points);
1851:     ISDestroy(&dimIS);
1852:   }
1853:   /* Search for other cells/faces/edges connected to the fault by a vertex */
1854:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
1855:   DMPlexGetSimplexOrBoxCells(dm, 0, &cStart, &cEnd);
1856:   DMLabelGetStratumIS(label, 0, &dimIS);
1857:   if (blabel) {DMLabelGetStratumIS(blabel, 2, &crossEdgeIS);}
1858:   if (dimIS && crossEdgeIS) {
1859:     IS vertIS = dimIS;

1861:     ISExpand(vertIS, crossEdgeIS, &dimIS);
1862:     ISDestroy(&crossEdgeIS);
1863:     ISDestroy(&vertIS);
1864:   }
1865:   if (!dimIS) {
1866:     return(0);
1867:   }
1868:   ISGetLocalSize(dimIS, &numPoints);
1869:   ISGetIndices(dimIS, &points);
1870:   for (p = 0; p < numPoints; ++p) { /* Loop over fault vertices */
1871:     PetscInt *star = NULL;
1872:     PetscInt  starSize, s;
1873:     PetscInt  again = 1;  /* 0: Finished 1: Keep iterating after a change 2: No change */

1875:     /* All points connected to the fault are inside a cell, so at the top level we will only check cells */
1876:     DMPlexGetTransitiveClosure(dm, points[p], PETSC_FALSE, &starSize, &star);
1877:     while (again) {
1878:       if (again > 1) SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Could not classify all cells connected to the fault");
1879:       again = 0;
1880:       for (s = 0; s < starSize*2; s += 2) {
1881:         const PetscInt  point = star[s];
1882:         const PetscInt *cone;
1883:         PetscInt        coneSize, c;

1885:         if ((point < cStart) || (point >= cEnd)) continue;
1886:         DMLabelGetValue(label, point, &val);
1887:         if (val != -1) continue;
1888:         again = again == 1 ? 1 : 2;
1889:         DMPlexGetConeSize(dm, point, &coneSize);
1890:         DMPlexGetCone(dm, point, &cone);
1891:         for (c = 0; c < coneSize; ++c) {
1892:           DMLabelGetValue(label, cone[c], &val);
1893:           if (val != -1) {
1894:             const PetscInt *ccone;
1895:             PetscInt        cconeSize, cc, side;

1897:             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);
1898:             if (val > 0) side =  1;
1899:             else         side = -1;
1900:             DMLabelSetValue(label, point, side*(shift+dim));
1901:             /* Mark cell faces which touch the fault */
1902:             DMPlexGetConeSize(dm, point, &cconeSize);
1903:             DMPlexGetCone(dm, point, &ccone);
1904:             for (cc = 0; cc < cconeSize; ++cc) {
1905:               PetscInt *closure = NULL;
1906:               PetscInt  closureSize, cl;

1908:               DMLabelGetValue(label, ccone[cc], &val);
1909:               if (val != -1) continue;
1910:               DMPlexGetTransitiveClosure(dm, ccone[cc], PETSC_TRUE, &closureSize, &closure);
1911:               for (cl = 0; cl < closureSize*2; cl += 2) {
1912:                 const PetscInt clp = closure[cl];

1914:                 DMLabelGetValue(label, clp, &val);
1915:                 if (val == -1) continue;
1916:                 DMLabelSetValue(label, ccone[cc], side*(shift+dim-1));
1917:                 break;
1918:               }
1919:               DMPlexRestoreTransitiveClosure(dm, ccone[cc], PETSC_TRUE, &closureSize, &closure);
1920:             }
1921:             again = 1;
1922:             break;
1923:           }
1924:         }
1925:       }
1926:     }
1927:     /* Classify the rest by cell membership */
1928:     for (s = 0; s < starSize*2; s += 2) {
1929:       const PetscInt point = star[s];

1931:       DMLabelGetValue(label, point, &val);
1932:       if (val == -1) {
1933:         PetscInt      *sstar = NULL;
1934:         PetscInt       sstarSize, ss;
1935:         PetscBool      marked = PETSC_FALSE, isHybrid;

1937:         DMPlexGetTransitiveClosure(dm, point, PETSC_FALSE, &sstarSize, &sstar);
1938:         for (ss = 0; ss < sstarSize*2; ss += 2) {
1939:           const PetscInt spoint = sstar[ss];

1941:           if ((spoint < cStart) || (spoint >= cEnd)) continue;
1942:           DMLabelGetValue(label, spoint, &val);
1943:           if (val == -1) SETERRQ2(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Cell %d in star of %d does not have a valid label", spoint, point);
1944:           DMLabelGetValue(depthLabel, point, &dep);
1945:           if (val > 0) {
1946:             DMLabelSetValue(label, point,   shift+dep);
1947:           } else {
1948:             DMLabelSetValue(label, point, -(shift+dep));
1949:           }
1950:           marked = PETSC_TRUE;
1951:           break;
1952:         }
1953:         DMPlexRestoreTransitiveClosure(dm, point, PETSC_FALSE, &sstarSize, &sstar);
1954:         DMPlexCellIsHybrid_Internal(dm, point, &isHybrid);
1955:         if (!isHybrid && !marked) SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Point %d could not be classified", point);
1956:       }
1957:     }
1958:     DMPlexRestoreTransitiveClosure(dm, points[p], PETSC_FALSE, &starSize, &star);
1959:   }
1960:   ISRestoreIndices(dimIS, &points);
1961:   ISDestroy(&dimIS);
1962:   /* If any faces touching the fault divide cells on either side, split them */
1963:   DMLabelGetStratumIS(label,   shift+dim-1,  &facePosIS);
1964:   DMLabelGetStratumIS(label, -(shift+dim-1), &faceNegIS);
1965:   ISExpand(facePosIS, faceNegIS, &dimIS);
1966:   ISDestroy(&facePosIS);
1967:   ISDestroy(&faceNegIS);
1968:   ISGetLocalSize(dimIS, &numPoints);
1969:   ISGetIndices(dimIS, &points);
1970:   for (p = 0; p < numPoints; ++p) {
1971:     const PetscInt  point = points[p];
1972:     const PetscInt *support;
1973:     PetscInt        supportSize, valA, valB;

1975:     DMPlexGetSupportSize(dm, point, &supportSize);
1976:     if (supportSize != 2) continue;
1977:     DMPlexGetSupport(dm, point, &support);
1978:     DMLabelGetValue(label, support[0], &valA);
1979:     DMLabelGetValue(label, support[1], &valB);
1980:     if ((valA == -1) || (valB == -1)) continue;
1981:     if (valA*valB > 0) continue;
1982:     /* Split the face */
1983:     DMLabelGetValue(label, point, &valA);
1984:     DMLabelClearValue(label, point, valA);
1985:     DMLabelSetValue(label, point, dim-1);
1986:     /* Label its closure:
1987:       unmarked: label as unsplit
1988:       incident: relabel as split
1989:       split:    do nothing
1990:     */
1991:     {
1992:       PetscInt *closure = NULL;
1993:       PetscInt  closureSize, cl;

1995:       DMPlexGetTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
1996:       for (cl = 0; cl < closureSize*2; cl += 2) {
1997:         DMLabelGetValue(label, closure[cl], &valA);
1998:         if (valA == -1) { /* Mark as unsplit */
1999:           DMLabelGetValue(depthLabel, closure[cl], &dep);
2000:           DMLabelSetValue(label, closure[cl], shift2+dep);
2001:         } else if (((valA >= shift) && (valA < shift2)) || ((valA <= -shift) && (valA > -shift2))) {
2002:           DMLabelGetValue(depthLabel, closure[cl], &dep);
2003:           DMLabelClearValue(label, closure[cl], valA);
2004:           DMLabelSetValue(label, closure[cl], dep);
2005:         }
2006:       }
2007:       DMPlexRestoreTransitiveClosure(dm, point, PETSC_TRUE, &closureSize, &closure);
2008:     }
2009:   }
2010:   ISRestoreIndices(dimIS, &points);
2011:   ISDestroy(&dimIS);
2012:   return(0);
2013: }

2015: /* Check that no cell have all vertices on the fault */
2016: PetscErrorCode DMPlexCheckValidSubmesh_Private(DM dm, DMLabel label, DM subdm)
2017: {
2018:   IS              subpointIS;
2019:   const PetscInt *dmpoints;
2020:   PetscInt        defaultValue, cStart, cEnd, c, vStart, vEnd;
2021:   PetscErrorCode  ierr;

2024:   if (!label) return(0);
2025:   DMLabelGetDefaultValue(label, &defaultValue);
2026:   DMPlexGetSubpointIS(subdm, &subpointIS);
2027:   if (!subpointIS) return(0);
2028:   DMPlexGetHeightStratum(subdm, 0, &cStart, &cEnd);
2029:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
2030:   ISGetIndices(subpointIS, &dmpoints);
2031:   for (c = cStart; c < cEnd; ++c) {
2032:     PetscBool invalidCell = PETSC_TRUE;
2033:     PetscInt *closure     = NULL;
2034:     PetscInt  closureSize, cl;

2036:     DMPlexGetTransitiveClosure(dm, dmpoints[c], PETSC_TRUE, &closureSize, &closure);
2037:     for (cl = 0; cl < closureSize*2; cl += 2) {
2038:       PetscInt value = 0;

2040:       if ((closure[cl] < vStart) || (closure[cl] >= vEnd)) continue;
2041:       DMLabelGetValue(label, closure[cl], &value);
2042:       if (value == defaultValue) {invalidCell = PETSC_FALSE; break;}
2043:     }
2044:     DMPlexRestoreTransitiveClosure(dm, dmpoints[c], PETSC_TRUE, &closureSize, &closure);
2045:     if (invalidCell) {
2046:       ISRestoreIndices(subpointIS, &dmpoints);
2047:       ISDestroy(&subpointIS);
2048:       DMDestroy(&subdm);
2049:       SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Ambiguous submesh. Cell %D has all of its vertices on the submesh.", dmpoints[c]);
2050:     }
2051:   }
2052:   ISRestoreIndices(subpointIS, &dmpoints);
2053:   return(0);
2054: }


2057: /*@
2058:   DMPlexCreateHybridMesh - Create a mesh with hybrid cells along an internal interface

2060:   Collective on dm

2062:   Input Parameters:
2063: + dm - The original DM
2064: . label - The label specifying the interface vertices
2065: - bdlabel - The optional label specifying the interface boundary vertices

2067:   Output Parameters:
2068: + hybridLabel - The label fully marking the interface, or NULL if no output is desired
2069: . splitLabel - The label containing the split points, or NULL if no output is desired
2070: . dmInterface - The new interface DM, or NULL
2071: - dmHybrid - The new DM with cohesive cells

2073:   Note: The hybridLabel indicates what parts of the original mesh impinged on the on division surface. For points
2074:   directly on the division surface, they are labeled with their dimension, so an edge 7 on the division surface would be
2075:   7 (1) in hybridLabel. For points that impinge from the positive side, they are labeled with 100+dim, so an edge 6 with
2076:   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
2077:   surface also hits vertex 3, it would be 9 (-101) in hybridLabel.

2079:   The splitLabel indicates what points in the new hybrid mesh were the result of splitting points in the original
2080:   mesh. The label value is +=100+dim for each point. For example, if two edges 10 and 14 in the hybrid resulting from
2081:   splitting an edge in the original mesh, you would have 10 (101) and 14 (-101) in the splitLabel.

2083:   The dmInterface is a DM built from the original division surface. It has a label which can be retrieved using
2084:   DMPlexGetSubpointMap() which maps each point back to the point in the surface of the original mesh.

2086:   Level: developer

2088: .seealso: DMPlexConstructCohesiveCells(), DMPlexLabelCohesiveComplete(), DMPlexGetSubpointMap(), DMCreate()
2089: @*/
2090: PetscErrorCode DMPlexCreateHybridMesh(DM dm, DMLabel label, DMLabel bdlabel, DMLabel *hybridLabel, DMLabel *splitLabel, DM *dmInterface, DM *dmHybrid)
2091: {
2092:   DM             idm;
2093:   DMLabel        subpointMap, hlabel, slabel = NULL;
2094:   PetscInt       dim;

2104:   DMGetDimension(dm, &dim);
2105:   DMPlexCreateSubmesh(dm, label, 1, PETSC_FALSE, &idm);
2106:   DMPlexCheckValidSubmesh_Private(dm, label, idm);
2107:   DMPlexOrient(idm);
2108:   DMPlexGetSubpointMap(idm, &subpointMap);
2109:   DMLabelDuplicate(subpointMap, &hlabel);
2110:   DMLabelClearStratum(hlabel, dim);
2111:   if (splitLabel) {
2112:     const char *name;
2113:     char        sname[PETSC_MAX_PATH_LEN];

2115:     PetscObjectGetName((PetscObject) hlabel, &name);
2116:     PetscStrncpy(sname, name, PETSC_MAX_PATH_LEN);
2117:     PetscStrcat(sname, " split");
2118:     DMLabelCreate(PETSC_COMM_SELF, sname, &slabel);
2119:   }
2120:   DMPlexLabelCohesiveComplete(dm, hlabel, bdlabel, PETSC_FALSE, idm);
2121:   if (dmInterface) {*dmInterface = idm;}
2122:   else             {DMDestroy(&idm);}
2123:   DMPlexConstructCohesiveCells(dm, hlabel, slabel, dmHybrid);
2124:   if (hybridLabel) *hybridLabel = hlabel;
2125:   else             {DMLabelDestroy(&hlabel);}
2126:   if (splitLabel)  *splitLabel  = slabel;
2127:   return(0);
2128: }

2130: /* Here we need the explicit assumption that:

2132:      For any marked cell, the marked vertices constitute a single face
2133: */
2134: static PetscErrorCode DMPlexMarkSubmesh_Uninterpolated(DM dm, DMLabel vertexLabel, PetscInt value, DMLabel subpointMap, PetscInt *numFaces, PetscInt *nFV, DM subdm)
2135: {
2136:   IS               subvertexIS = NULL;
2137:   const PetscInt  *subvertices;
2138:   PetscInt        *pStart, *pEnd, pSize;
2139:   PetscInt         depth, dim, d, numSubVerticesInitial = 0, v;
2140:   PetscErrorCode   ierr;

2143:   *numFaces = 0;
2144:   *nFV      = 0;
2145:   DMPlexGetDepth(dm, &depth);
2146:   DMGetDimension(dm, &dim);
2147:   pSize = PetscMax(depth, dim) + 1;
2148:   PetscMalloc2(pSize, &pStart, pSize, &pEnd);
2149:   for (d = 0; d <= depth; ++d) {
2150:     DMPlexGetSimplexOrBoxCells(dm, depth-d, &pStart[d], &pEnd[d]);
2151:   }
2152:   /* Loop over initial vertices and mark all faces in the collective star() */
2153:   if (vertexLabel) {DMLabelGetStratumIS(vertexLabel, value, &subvertexIS);}
2154:   if (subvertexIS) {
2155:     ISGetSize(subvertexIS, &numSubVerticesInitial);
2156:     ISGetIndices(subvertexIS, &subvertices);
2157:   }
2158:   for (v = 0; v < numSubVerticesInitial; ++v) {
2159:     const PetscInt vertex = subvertices[v];
2160:     PetscInt      *star   = NULL;
2161:     PetscInt       starSize, s, numCells = 0, c;

2163:     DMPlexGetTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2164:     for (s = 0; s < starSize*2; s += 2) {
2165:       const PetscInt point = star[s];
2166:       if ((point >= pStart[depth]) && (point < pEnd[depth])) star[numCells++] = point;
2167:     }
2168:     for (c = 0; c < numCells; ++c) {
2169:       const PetscInt cell    = star[c];
2170:       PetscInt      *closure = NULL;
2171:       PetscInt       closureSize, cl;
2172:       PetscInt       cellLoc, numCorners = 0, faceSize = 0;

2174:       DMLabelGetValue(subpointMap, cell, &cellLoc);
2175:       if (cellLoc == 2) continue;
2176:       if (cellLoc >= 0) SETERRQ2(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Cell %d has dimension %d in the surface label", cell, cellLoc);
2177:       DMPlexGetTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2178:       for (cl = 0; cl < closureSize*2; cl += 2) {
2179:         const PetscInt point = closure[cl];
2180:         PetscInt       vertexLoc;

2182:         if ((point >= pStart[0]) && (point < pEnd[0])) {
2183:           ++numCorners;
2184:           DMLabelGetValue(vertexLabel, point, &vertexLoc);
2185:           if (vertexLoc == value) closure[faceSize++] = point;
2186:         }
2187:       }
2188:       if (!(*nFV)) {DMPlexGetNumFaceVertices(dm, dim, numCorners, nFV);}
2189:       if (faceSize > *nFV) SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Invalid submesh: Too many vertices %d of an element on the surface", faceSize);
2190:       if (faceSize == *nFV) {
2191:         const PetscInt *cells = NULL;
2192:         PetscInt        numCells, nc;

2194:         ++(*numFaces);
2195:         for (cl = 0; cl < faceSize; ++cl) {
2196:           DMLabelSetValue(subpointMap, closure[cl], 0);
2197:         }
2198:         DMPlexGetJoin(dm, faceSize, closure, &numCells, &cells);
2199:         for (nc = 0; nc < numCells; ++nc) {
2200:           DMLabelSetValue(subpointMap, cells[nc], 2);
2201:         }
2202:         DMPlexRestoreJoin(dm, faceSize, closure, &numCells, &cells);
2203:       }
2204:       DMPlexRestoreTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2205:     }
2206:     DMPlexRestoreTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2207:   }
2208:   if (subvertexIS) {
2209:     ISRestoreIndices(subvertexIS, &subvertices);
2210:   }
2211:   ISDestroy(&subvertexIS);
2212:   PetscFree2(pStart, pEnd);
2213:   return(0);
2214: }

2216: static PetscErrorCode DMPlexMarkSubmesh_Interpolated(DM dm, DMLabel vertexLabel, PetscInt value, PetscBool markedFaces, DMLabel subpointMap, DM subdm)
2217: {
2218:   IS               subvertexIS = NULL;
2219:   const PetscInt  *subvertices;
2220:   PetscInt        *pStart, *pEnd;
2221:   PetscInt         dim, d, numSubVerticesInitial = 0, v;
2222:   PetscErrorCode   ierr;

2225:   DMGetDimension(dm, &dim);
2226:   PetscMalloc2(dim+1, &pStart, dim+1, &pEnd);
2227:   for (d = 0; d <= dim; ++d) {
2228:     DMPlexGetSimplexOrBoxCells(dm, dim-d, &pStart[d], &pEnd[d]);
2229:   }
2230:   /* Loop over initial vertices and mark all faces in the collective star() */
2231:   if (vertexLabel) {
2232:     DMLabelGetStratumIS(vertexLabel, value, &subvertexIS);
2233:     if (subvertexIS) {
2234:       ISGetSize(subvertexIS, &numSubVerticesInitial);
2235:       ISGetIndices(subvertexIS, &subvertices);
2236:     }
2237:   }
2238:   for (v = 0; v < numSubVerticesInitial; ++v) {
2239:     const PetscInt vertex = subvertices[v];
2240:     PetscInt      *star   = NULL;
2241:     PetscInt       starSize, s, numFaces = 0, f;

2243:     DMPlexGetTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2244:     for (s = 0; s < starSize*2; s += 2) {
2245:       const PetscInt point = star[s];
2246:       PetscInt       faceLoc;

2248:       if ((point >= pStart[dim-1]) && (point < pEnd[dim-1])) {
2249:         if (markedFaces) {
2250:           DMLabelGetValue(vertexLabel, point, &faceLoc);
2251:           if (faceLoc < 0) continue;
2252:         }
2253:         star[numFaces++] = point;
2254:       }
2255:     }
2256:     for (f = 0; f < numFaces; ++f) {
2257:       const PetscInt face    = star[f];
2258:       PetscInt      *closure = NULL;
2259:       PetscInt       closureSize, c;
2260:       PetscInt       faceLoc;

2262:       DMLabelGetValue(subpointMap, face, &faceLoc);
2263:       if (faceLoc == dim-1) continue;
2264:       if (faceLoc >= 0) SETERRQ2(PetscObjectComm((PetscObject)dm), PETSC_ERR_PLIB, "Face %d has dimension %d in the surface label", face, faceLoc);
2265:       DMPlexGetTransitiveClosure(dm, face, PETSC_TRUE, &closureSize, &closure);
2266:       for (c = 0; c < closureSize*2; c += 2) {
2267:         const PetscInt point = closure[c];
2268:         PetscInt       vertexLoc;

2270:         if ((point >= pStart[0]) && (point < pEnd[0])) {
2271:           DMLabelGetValue(vertexLabel, point, &vertexLoc);
2272:           if (vertexLoc != value) break;
2273:         }
2274:       }
2275:       if (c == closureSize*2) {
2276:         const PetscInt *support;
2277:         PetscInt        supportSize, s;

2279:         for (c = 0; c < closureSize*2; c += 2) {
2280:           const PetscInt point = closure[c];

2282:           for (d = 0; d < dim; ++d) {
2283:             if ((point >= pStart[d]) && (point < pEnd[d])) {
2284:               DMLabelSetValue(subpointMap, point, d);
2285:               break;
2286:             }
2287:           }
2288:         }
2289:         DMPlexGetSupportSize(dm, face, &supportSize);
2290:         DMPlexGetSupport(dm, face, &support);
2291:         for (s = 0; s < supportSize; ++s) {
2292:           DMLabelSetValue(subpointMap, support[s], dim);
2293:         }
2294:       }
2295:       DMPlexRestoreTransitiveClosure(dm, face, PETSC_TRUE, &closureSize, &closure);
2296:     }
2297:     DMPlexRestoreTransitiveClosure(dm, vertex, PETSC_FALSE, &starSize, &star);
2298:   }
2299:   if (subvertexIS) {ISRestoreIndices(subvertexIS, &subvertices);}
2300:   ISDestroy(&subvertexIS);
2301:   PetscFree2(pStart, pEnd);
2302:   return(0);
2303: }

2305: static PetscErrorCode DMPlexMarkCohesiveSubmesh_Uninterpolated(DM dm, PetscBool hasLagrange, const char labelname[], PetscInt value, DMLabel subpointMap, PetscInt *numFaces, PetscInt *nFV, PetscInt *subCells[], DM subdm)
2306: {
2307:   DMLabel         label = NULL;
2308:   const PetscInt *cone;
2309:   PetscInt        dim, cMax, cEnd, c, subc = 0, p, coneSize = -1;
2310:   PetscErrorCode  ierr;

2313:   *numFaces = 0;
2314:   *nFV = 0;
2315:   if (labelname) {DMGetLabel(dm, labelname, &label);}
2316:   *subCells = NULL;
2317:   DMGetDimension(dm, &dim);
2318:   DMPlexGetTensorPrismBounds_Internal(dm, dim, &cMax, &cEnd);
2319:   if (cMax < 0) return(0);
2320:   if (label) {
2321:     for (c = cMax; c < cEnd; ++c) {
2322:       PetscInt val;

2324:       DMLabelGetValue(label, c, &val);
2325:       if (val == value) {
2326:         ++(*numFaces);
2327:         DMPlexGetConeSize(dm, c, &coneSize);
2328:       }
2329:     }
2330:   } else {
2331:     *numFaces = cEnd - cMax;
2332:     DMPlexGetConeSize(dm, cMax, &coneSize);
2333:   }
2334:   PetscMalloc1(*numFaces *2, subCells);
2335:   if (!(*numFaces)) return(0);
2336:   *nFV = hasLagrange ? coneSize/3 : coneSize/2;
2337:   for (c = cMax; c < cEnd; ++c) {
2338:     const PetscInt *cells;
2339:     PetscInt        numCells;

2341:     if (label) {
2342:       PetscInt val;

2344:       DMLabelGetValue(label, c, &val);
2345:       if (val != value) continue;
2346:     }
2347:     DMPlexGetCone(dm, c, &cone);
2348:     for (p = 0; p < *nFV; ++p) {
2349:       DMLabelSetValue(subpointMap, cone[p], 0);
2350:     }
2351:     /* Negative face */
2352:     DMPlexGetJoin(dm, *nFV, cone, &numCells, &cells);
2353:     /* Not true in parallel
2354:     if (numCells != 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive cells should separate two cells"); */
2355:     for (p = 0; p < numCells; ++p) {
2356:       DMLabelSetValue(subpointMap, cells[p], 2);
2357:       (*subCells)[subc++] = cells[p];
2358:     }
2359:     DMPlexRestoreJoin(dm, *nFV, cone, &numCells, &cells);
2360:     /* Positive face is not included */
2361:   }
2362:   return(0);
2363: }

2365: static PetscErrorCode DMPlexMarkCohesiveSubmesh_Interpolated(DM dm, DMLabel label, PetscInt value, DMLabel subpointMap, DM subdm)
2366: {
2367:   PetscInt      *pStart, *pEnd;
2368:   PetscInt       dim, cMax, cEnd, c, d;

2372:   DMGetDimension(dm, &dim);
2373:   DMPlexGetTensorPrismBounds_Internal(dm, dim, &cMax, &cEnd);
2374:   if (cMax < 0) return(0);
2375:   PetscMalloc2(dim+1,&pStart,dim+1,&pEnd);
2376:   for (d = 0; d <= dim; ++d) {DMPlexGetDepthStratum(dm, d, &pStart[d], &pEnd[d]);}
2377:   for (c = cMax; c < cEnd; ++c) {
2378:     const PetscInt *cone;
2379:     PetscInt       *closure = NULL;
2380:     PetscInt        fconeSize, coneSize, closureSize, cl, val;

2382:     if (label) {
2383:       DMLabelGetValue(label, c, &val);
2384:       if (val != value) continue;
2385:     }
2386:     DMPlexGetConeSize(dm, c, &coneSize);
2387:     DMPlexGetCone(dm, c, &cone);
2388:     DMPlexGetConeSize(dm, cone[0], &fconeSize);
2389:     if (coneSize != (fconeSize ? fconeSize : 1) + 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive cells should separate two cells");
2390:     /* Negative face */
2391:     DMPlexGetTransitiveClosure(dm, cone[0], PETSC_TRUE, &closureSize, &closure);
2392:     for (cl = 0; cl < closureSize*2; cl += 2) {
2393:       const PetscInt point = closure[cl];

2395:       for (d = 0; d <= dim; ++d) {
2396:         if ((point >= pStart[d]) && (point < pEnd[d])) {
2397:           DMLabelSetValue(subpointMap, point, d);
2398:           break;
2399:         }
2400:       }
2401:     }
2402:     DMPlexRestoreTransitiveClosure(dm, cone[0], PETSC_TRUE, &closureSize, &closure);
2403:     /* Cells -- positive face is not included */
2404:     for (cl = 0; cl < 1; ++cl) {
2405:       const PetscInt *support;
2406:       PetscInt        supportSize, s;

2408:       DMPlexGetSupportSize(dm, cone[cl], &supportSize);
2409:       /* if (supportSize != 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive faces should separate two cells"); */
2410:       DMPlexGetSupport(dm, cone[cl], &support);
2411:       for (s = 0; s < supportSize; ++s) {
2412:         DMLabelSetValue(subpointMap, support[s], dim);
2413:       }
2414:     }
2415:   }
2416:   PetscFree2(pStart, pEnd);
2417:   return(0);
2418: }

2420: static PetscErrorCode DMPlexGetFaceOrientation(DM dm, PetscInt cell, PetscInt numCorners, PetscInt indices[], PetscInt oppositeVertex, PetscInt origVertices[], PetscInt faceVertices[], PetscBool *posOriented)
2421: {
2422:   MPI_Comm       comm;
2423:   PetscBool      posOrient = PETSC_FALSE;
2424:   const PetscInt debug     = 0;
2425:   PetscInt       cellDim, faceSize, f;

2429:   PetscObjectGetComm((PetscObject)dm,&comm);
2430:   DMGetDimension(dm, &cellDim);
2431:   if (debug) {PetscPrintf(comm, "cellDim: %d numCorners: %d\n", cellDim, numCorners);}

2433:   if (cellDim == 1 && numCorners == 2) {
2434:     /* Triangle */
2435:     faceSize  = numCorners-1;
2436:     posOrient = !(oppositeVertex%2) ? PETSC_TRUE : PETSC_FALSE;
2437:   } else if (cellDim == 2 && numCorners == 3) {
2438:     /* Triangle */
2439:     faceSize  = numCorners-1;
2440:     posOrient = !(oppositeVertex%2) ? PETSC_TRUE : PETSC_FALSE;
2441:   } else if (cellDim == 3 && numCorners == 4) {
2442:     /* Tetrahedron */
2443:     faceSize  = numCorners-1;
2444:     posOrient = (oppositeVertex%2) ? PETSC_TRUE : PETSC_FALSE;
2445:   } else if (cellDim == 1 && numCorners == 3) {
2446:     /* Quadratic line */
2447:     faceSize  = 1;
2448:     posOrient = PETSC_TRUE;
2449:   } else if (cellDim == 2 && numCorners == 4) {
2450:     /* Quads */
2451:     faceSize = 2;
2452:     if ((indices[1] > indices[0]) && (indices[1] - indices[0] == 1)) {
2453:       posOrient = PETSC_TRUE;
2454:     } else if ((indices[0] == 3) && (indices[1] == 0)) {
2455:       posOrient = PETSC_TRUE;
2456:     } else {
2457:       if (((indices[0] > indices[1]) && (indices[0] - indices[1] == 1)) || ((indices[0] == 0) && (indices[1] == 3))) {
2458:         posOrient = PETSC_FALSE;
2459:       } else SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid quad crossedge");
2460:     }
2461:   } else if (cellDim == 2 && numCorners == 6) {
2462:     /* Quadratic triangle (I hate this) */
2463:     /* Edges are determined by the first 2 vertices (corners of edges) */
2464:     const PetscInt faceSizeTri = 3;
2465:     PetscInt       sortedIndices[3], i, iFace;
2466:     PetscBool      found                    = PETSC_FALSE;
2467:     PetscInt       faceVerticesTriSorted[9] = {
2468:       0, 3,  4, /* bottom */
2469:       1, 4,  5, /* right */
2470:       2, 3,  5, /* left */
2471:     };
2472:     PetscInt       faceVerticesTri[9] = {
2473:       0, 3,  4, /* bottom */
2474:       1, 4,  5, /* right */
2475:       2, 5,  3, /* left */
2476:     };

2478:     for (i = 0; i < faceSizeTri; ++i) sortedIndices[i] = indices[i];
2479:     PetscSortInt(faceSizeTri, sortedIndices);
2480:     for (iFace = 0; iFace < 3; ++iFace) {
2481:       const PetscInt ii = iFace*faceSizeTri;
2482:       PetscInt       fVertex, cVertex;

2484:       if ((sortedIndices[0] == faceVerticesTriSorted[ii+0]) &&
2485:           (sortedIndices[1] == faceVerticesTriSorted[ii+1])) {
2486:         for (fVertex = 0; fVertex < faceSizeTri; ++fVertex) {
2487:           for (cVertex = 0; cVertex < faceSizeTri; ++cVertex) {
2488:             if (indices[cVertex] == faceVerticesTri[ii+fVertex]) {
2489:               faceVertices[fVertex] = origVertices[cVertex];
2490:               break;
2491:             }
2492:           }
2493:         }
2494:         found = PETSC_TRUE;
2495:         break;
2496:       }
2497:     }
2498:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid tri crossface");
2499:     if (posOriented) *posOriented = PETSC_TRUE;
2500:     return(0);
2501:   } else if (cellDim == 2 && numCorners == 9) {
2502:     /* Quadratic quad (I hate this) */
2503:     /* Edges are determined by the first 2 vertices (corners of edges) */
2504:     const PetscInt faceSizeQuad = 3;
2505:     PetscInt       sortedIndices[3], i, iFace;
2506:     PetscBool      found                      = PETSC_FALSE;
2507:     PetscInt       faceVerticesQuadSorted[12] = {
2508:       0, 1,  4, /* bottom */
2509:       1, 2,  5, /* right */
2510:       2, 3,  6, /* top */
2511:       0, 3,  7, /* left */
2512:     };
2513:     PetscInt       faceVerticesQuad[12] = {
2514:       0, 1,  4, /* bottom */
2515:       1, 2,  5, /* right */
2516:       2, 3,  6, /* top */
2517:       3, 0,  7, /* left */
2518:     };

2520:     for (i = 0; i < faceSizeQuad; ++i) sortedIndices[i] = indices[i];
2521:     PetscSortInt(faceSizeQuad, sortedIndices);
2522:     for (iFace = 0; iFace < 4; ++iFace) {
2523:       const PetscInt ii = iFace*faceSizeQuad;
2524:       PetscInt       fVertex, cVertex;

2526:       if ((sortedIndices[0] == faceVerticesQuadSorted[ii+0]) &&
2527:           (sortedIndices[1] == faceVerticesQuadSorted[ii+1])) {
2528:         for (fVertex = 0; fVertex < faceSizeQuad; ++fVertex) {
2529:           for (cVertex = 0; cVertex < faceSizeQuad; ++cVertex) {
2530:             if (indices[cVertex] == faceVerticesQuad[ii+fVertex]) {
2531:               faceVertices[fVertex] = origVertices[cVertex];
2532:               break;
2533:             }
2534:           }
2535:         }
2536:         found = PETSC_TRUE;
2537:         break;
2538:       }
2539:     }
2540:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid quad crossface");
2541:     if (posOriented) *posOriented = PETSC_TRUE;
2542:     return(0);
2543:   } else if (cellDim == 3 && numCorners == 8) {
2544:     /* Hexes
2545:        A hex is two oriented quads with the normal of the first
2546:        pointing up at the second.

2548:           7---6
2549:          /|  /|
2550:         4---5 |
2551:         | 1-|-2
2552:         |/  |/
2553:         0---3

2555:         Faces are determined by the first 4 vertices (corners of faces) */
2556:     const PetscInt faceSizeHex = 4;
2557:     PetscInt       sortedIndices[4], i, iFace;
2558:     PetscBool      found                     = PETSC_FALSE;
2559:     PetscInt       faceVerticesHexSorted[24] = {
2560:       0, 1, 2, 3,  /* bottom */
2561:       4, 5, 6, 7,  /* top */
2562:       0, 3, 4, 5,  /* front */
2563:       2, 3, 5, 6,  /* right */
2564:       1, 2, 6, 7,  /* back */
2565:       0, 1, 4, 7,  /* left */
2566:     };
2567:     PetscInt       faceVerticesHex[24] = {
2568:       1, 2, 3, 0,  /* bottom */
2569:       4, 5, 6, 7,  /* top */
2570:       0, 3, 5, 4,  /* front */
2571:       3, 2, 6, 5,  /* right */
2572:       2, 1, 7, 6,  /* back */
2573:       1, 0, 4, 7,  /* left */
2574:     };

2576:     for (i = 0; i < faceSizeHex; ++i) sortedIndices[i] = indices[i];
2577:     PetscSortInt(faceSizeHex, sortedIndices);
2578:     for (iFace = 0; iFace < 6; ++iFace) {
2579:       const PetscInt ii = iFace*faceSizeHex;
2580:       PetscInt       fVertex, cVertex;

2582:       if ((sortedIndices[0] == faceVerticesHexSorted[ii+0]) &&
2583:           (sortedIndices[1] == faceVerticesHexSorted[ii+1]) &&
2584:           (sortedIndices[2] == faceVerticesHexSorted[ii+2]) &&
2585:           (sortedIndices[3] == faceVerticesHexSorted[ii+3])) {
2586:         for (fVertex = 0; fVertex < faceSizeHex; ++fVertex) {
2587:           for (cVertex = 0; cVertex < faceSizeHex; ++cVertex) {
2588:             if (indices[cVertex] == faceVerticesHex[ii+fVertex]) {
2589:               faceVertices[fVertex] = origVertices[cVertex];
2590:               break;
2591:             }
2592:           }
2593:         }
2594:         found = PETSC_TRUE;
2595:         break;
2596:       }
2597:     }
2598:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid hex crossface");
2599:     if (posOriented) *posOriented = PETSC_TRUE;
2600:     return(0);
2601:   } else if (cellDim == 3 && numCorners == 10) {
2602:     /* Quadratic tet */
2603:     /* Faces are determined by the first 3 vertices (corners of faces) */
2604:     const PetscInt faceSizeTet = 6;
2605:     PetscInt       sortedIndices[6], i, iFace;
2606:     PetscBool      found                     = PETSC_FALSE;
2607:     PetscInt       faceVerticesTetSorted[24] = {
2608:       0, 1, 2,  6, 7, 8, /* bottom */
2609:       0, 3, 4,  6, 7, 9,  /* front */
2610:       1, 4, 5,  7, 8, 9,  /* right */
2611:       2, 3, 5,  6, 8, 9,  /* left */
2612:     };
2613:     PetscInt       faceVerticesTet[24] = {
2614:       0, 1, 2,  6, 7, 8, /* bottom */
2615:       0, 4, 3,  6, 7, 9,  /* front */
2616:       1, 5, 4,  7, 8, 9,  /* right */
2617:       2, 3, 5,  8, 6, 9,  /* left */
2618:     };

2620:     for (i = 0; i < faceSizeTet; ++i) sortedIndices[i] = indices[i];
2621:     PetscSortInt(faceSizeTet, sortedIndices);
2622:     for (iFace=0; iFace < 4; ++iFace) {
2623:       const PetscInt ii = iFace*faceSizeTet;
2624:       PetscInt       fVertex, cVertex;

2626:       if ((sortedIndices[0] == faceVerticesTetSorted[ii+0]) &&
2627:           (sortedIndices[1] == faceVerticesTetSorted[ii+1]) &&
2628:           (sortedIndices[2] == faceVerticesTetSorted[ii+2]) &&
2629:           (sortedIndices[3] == faceVerticesTetSorted[ii+3])) {
2630:         for (fVertex = 0; fVertex < faceSizeTet; ++fVertex) {
2631:           for (cVertex = 0; cVertex < faceSizeTet; ++cVertex) {
2632:             if (indices[cVertex] == faceVerticesTet[ii+fVertex]) {
2633:               faceVertices[fVertex] = origVertices[cVertex];
2634:               break;
2635:             }
2636:           }
2637:         }
2638:         found = PETSC_TRUE;
2639:         break;
2640:       }
2641:     }
2642:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid tet crossface");
2643:     if (posOriented) *posOriented = PETSC_TRUE;
2644:     return(0);
2645:   } else if (cellDim == 3 && numCorners == 27) {
2646:     /* Quadratic hexes (I hate this)
2647:        A hex is two oriented quads with the normal of the first
2648:        pointing up at the second.

2650:          7---6
2651:         /|  /|
2652:        4---5 |
2653:        | 3-|-2
2654:        |/  |/
2655:        0---1

2657:        Faces are determined by the first 4 vertices (corners of faces) */
2658:     const PetscInt faceSizeQuadHex = 9;
2659:     PetscInt       sortedIndices[9], i, iFace;
2660:     PetscBool      found                         = PETSC_FALSE;
2661:     PetscInt       faceVerticesQuadHexSorted[54] = {
2662:       0, 1, 2, 3,  8, 9, 10, 11,  24, /* bottom */
2663:       4, 5, 6, 7,  12, 13, 14, 15,  25, /* top */
2664:       0, 1, 4, 5,  8, 12, 16, 17,  22, /* front */
2665:       1, 2, 5, 6,  9, 13, 17, 18,  21, /* right */
2666:       2, 3, 6, 7,  10, 14, 18, 19,  23, /* back */
2667:       0, 3, 4, 7,  11, 15, 16, 19,  20, /* left */
2668:     };
2669:     PetscInt       faceVerticesQuadHex[54] = {
2670:       3, 2, 1, 0,  10, 9, 8, 11,  24, /* bottom */
2671:       4, 5, 6, 7,  12, 13, 14, 15,  25, /* top */
2672:       0, 1, 5, 4,  8, 17, 12, 16,  22, /* front */
2673:       1, 2, 6, 5,  9, 18, 13, 17,  21, /* right */
2674:       2, 3, 7, 6,  10, 19, 14, 18,  23, /* back */
2675:       3, 0, 4, 7,  11, 16, 15, 19,  20 /* left */
2676:     };

2678:     for (i = 0; i < faceSizeQuadHex; ++i) sortedIndices[i] = indices[i];
2679:     PetscSortInt(faceSizeQuadHex, sortedIndices);
2680:     for (iFace = 0; iFace < 6; ++iFace) {
2681:       const PetscInt ii = iFace*faceSizeQuadHex;
2682:       PetscInt       fVertex, cVertex;

2684:       if ((sortedIndices[0] == faceVerticesQuadHexSorted[ii+0]) &&
2685:           (sortedIndices[1] == faceVerticesQuadHexSorted[ii+1]) &&
2686:           (sortedIndices[2] == faceVerticesQuadHexSorted[ii+2]) &&
2687:           (sortedIndices[3] == faceVerticesQuadHexSorted[ii+3])) {
2688:         for (fVertex = 0; fVertex < faceSizeQuadHex; ++fVertex) {
2689:           for (cVertex = 0; cVertex < faceSizeQuadHex; ++cVertex) {
2690:             if (indices[cVertex] == faceVerticesQuadHex[ii+fVertex]) {
2691:               faceVertices[fVertex] = origVertices[cVertex];
2692:               break;
2693:             }
2694:           }
2695:         }
2696:         found = PETSC_TRUE;
2697:         break;
2698:       }
2699:     }
2700:     if (!found) SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Invalid hex crossface");
2701:     if (posOriented) *posOriented = PETSC_TRUE;
2702:     return(0);
2703:   } else SETERRQ(comm, PETSC_ERR_ARG_WRONG, "Unknown cell type for faceOrientation().");
2704:   if (!posOrient) {
2705:     if (debug) {PetscPrintf(comm, "  Reversing initial face orientation\n");}
2706:     for (f = 0; f < faceSize; ++f) faceVertices[f] = origVertices[faceSize-1 - f];
2707:   } else {
2708:     if (debug) {PetscPrintf(comm, "  Keeping initial face orientation\n");}
2709:     for (f = 0; f < faceSize; ++f) faceVertices[f] = origVertices[f];
2710:   }
2711:   if (posOriented) *posOriented = posOrient;
2712:   return(0);
2713: }

2715: /*@
2716:   DMPlexGetOrientedFace - Given a cell and a face, as a set of vertices, return the oriented face, as a set of vertices,
2717:   in faceVertices. The orientation is such that the face normal points out of the cell

2719:   Not collective

2721:   Input Parameters:
2722: + dm           - The original mesh
2723: . cell         - The cell mesh point
2724: . faceSize     - The number of vertices on the face
2725: . face         - The face vertices
2726: . numCorners   - The number of vertices on the cell
2727: . indices      - Local numbering of face vertices in cell cone
2728: - origVertices - Original face vertices

2730:   Output Parameter:
2731: + faceVertices - The face vertices properly oriented
2732: - posOriented  - PETSC_TRUE if the face was oriented with outward normal

2734:   Level: developer

2736: .seealso: DMPlexGetCone()
2737: @*/
2738: PetscErrorCode DMPlexGetOrientedFace(DM dm, PetscInt cell, PetscInt faceSize, const PetscInt face[], PetscInt numCorners, PetscInt indices[], PetscInt origVertices[], PetscInt faceVertices[], PetscBool *posOriented)
2739: {
2740:   const PetscInt *cone = NULL;
2741:   PetscInt        coneSize, v, f, v2;
2742:   PetscInt        oppositeVertex = -1;
2743:   PetscErrorCode  ierr;

2746:   DMPlexGetConeSize(dm, cell, &coneSize);
2747:   DMPlexGetCone(dm, cell, &cone);
2748:   for (v = 0, v2 = 0; v < coneSize; ++v) {
2749:     PetscBool found = PETSC_FALSE;

2751:     for (f = 0; f < faceSize; ++f) {
2752:       if (face[f] == cone[v]) {
2753:         found = PETSC_TRUE; break;
2754:       }
2755:     }
2756:     if (found) {
2757:       indices[v2]      = v;
2758:       origVertices[v2] = cone[v];
2759:       ++v2;
2760:     } else {
2761:       oppositeVertex = v;
2762:     }
2763:   }
2764:   DMPlexGetFaceOrientation(dm, cell, numCorners, indices, oppositeVertex, origVertices, faceVertices, posOriented);
2765:   return(0);
2766: }

2768: /*
2769:   DMPlexInsertFace_Internal - Puts a face into the mesh

2771:   Not collective

2773:   Input Parameters:
2774:   + dm              - The DMPlex
2775:   . numFaceVertex   - The number of vertices in the face
2776:   . faceVertices    - The vertices in the face for dm
2777:   . subfaceVertices - The vertices in the face for subdm
2778:   . numCorners      - The number of vertices in the cell
2779:   . cell            - A cell in dm containing the face
2780:   . subcell         - A cell in subdm containing the face
2781:   . firstFace       - First face in the mesh
2782:   - newFacePoint    - Next face in the mesh

2784:   Output Parameters:
2785:   . newFacePoint - Contains next face point number on input, updated on output

2787:   Level: developer
2788: */
2789: 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)
2790: {
2791:   MPI_Comm        comm;
2792:   DM_Plex        *submesh = (DM_Plex*) subdm->data;
2793:   const PetscInt *faces;
2794:   PetscInt        numFaces, coneSize;
2795:   PetscErrorCode  ierr;

2798:   PetscObjectGetComm((PetscObject)dm,&comm);
2799:   DMPlexGetConeSize(subdm, subcell, &coneSize);
2800:   if (coneSize != 1) SETERRQ2(comm, PETSC_ERR_ARG_OUTOFRANGE, "Cone size of cell %d is %d != 1", cell, coneSize);
2801: #if 0
2802:   /* Cannot use this because support() has not been constructed yet */
2803:   DMPlexGetJoin(subdm, numFaceVertices, subfaceVertices, &numFaces, &faces);
2804: #else
2805:   {
2806:     PetscInt f;

2808:     numFaces = 0;
2809:     DMGetWorkArray(subdm, 1, MPIU_INT, (void **) &faces);
2810:     for (f = firstFace; f < *newFacePoint; ++f) {
2811:       PetscInt dof, off, d;

2813:       PetscSectionGetDof(submesh->coneSection, f, &dof);
2814:       PetscSectionGetOffset(submesh->coneSection, f, &off);
2815:       /* Yes, I know this is quadratic, but I expect the sizes to be <5 */
2816:       for (d = 0; d < dof; ++d) {
2817:         const PetscInt p = submesh->cones[off+d];
2818:         PetscInt       v;

2820:         for (v = 0; v < numFaceVertices; ++v) {
2821:           if (subfaceVertices[v] == p) break;
2822:         }
2823:         if (v == numFaceVertices) break;
2824:       }
2825:       if (d == dof) {
2826:         numFaces               = 1;
2827:         ((PetscInt*) faces)[0] = f;
2828:       }
2829:     }
2830:   }
2831: #endif
2832:   if (numFaces > 1) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Vertex set had %d faces, not one", numFaces);
2833:   else if (numFaces == 1) {
2834:     /* Add the other cell neighbor for this face */
2835:     DMPlexSetCone(subdm, subcell, faces);
2836:   } else {
2837:     PetscInt *indices, *origVertices, *orientedVertices, *orientedSubVertices, v, ov;
2838:     PetscBool posOriented;

2840:     DMGetWorkArray(subdm, 4*numFaceVertices * sizeof(PetscInt), MPIU_INT, &orientedVertices);
2841:     origVertices        = &orientedVertices[numFaceVertices];
2842:     indices             = &orientedVertices[numFaceVertices*2];
2843:     orientedSubVertices = &orientedVertices[numFaceVertices*3];
2844:     DMPlexGetOrientedFace(dm, cell, numFaceVertices, faceVertices, numCorners, indices, origVertices, orientedVertices, &posOriented);
2845:     /* TODO: I know that routine should return a permutation, not the indices */
2846:     for (v = 0; v < numFaceVertices; ++v) {
2847:       const PetscInt vertex = faceVertices[v], subvertex = subfaceVertices[v];
2848:       for (ov = 0; ov < numFaceVertices; ++ov) {
2849:         if (orientedVertices[ov] == vertex) {
2850:           orientedSubVertices[ov] = subvertex;
2851:           break;
2852:         }
2853:       }
2854:       if (ov == numFaceVertices) SETERRQ1(comm, PETSC_ERR_PLIB, "Could not find face vertex %d in orientated set", vertex);
2855:     }
2856:     DMPlexSetCone(subdm, *newFacePoint, orientedSubVertices);
2857:     DMPlexSetCone(subdm, subcell, newFacePoint);
2858:     DMRestoreWorkArray(subdm, 4*numFaceVertices * sizeof(PetscInt), MPIU_INT, &orientedVertices);
2859:     ++(*newFacePoint);
2860:   }
2861: #if 0
2862:   DMPlexRestoreJoin(subdm, numFaceVertices, subfaceVertices, &numFaces, &faces);
2863: #else
2864:   DMRestoreWorkArray(subdm, 1, MPIU_INT, (void **) &faces);
2865: #endif
2866:   return(0);
2867: }

2869: static PetscErrorCode DMPlexCreateSubmesh_Uninterpolated(DM dm, DMLabel vertexLabel, PetscInt value, DM subdm)
2870: {
2871:   MPI_Comm        comm;
2872:   DMLabel         subpointMap;
2873:   IS              subvertexIS,  subcellIS;
2874:   const PetscInt *subVertices, *subCells;
2875:   PetscInt        numSubVertices, firstSubVertex, numSubCells;
2876:   PetscInt       *subface, maxConeSize, numSubFaces = 0, firstSubFace, newFacePoint, nFV = 0;
2877:   PetscInt        vStart, vEnd, c, f;
2878:   PetscErrorCode  ierr;

2881:   PetscObjectGetComm((PetscObject)dm,&comm);
2882:   /* Create subpointMap which marks the submesh */
2883:   DMLabelCreate(PETSC_COMM_SELF, "subpoint_map", &subpointMap);
2884:   DMPlexSetSubpointMap(subdm, subpointMap);
2885:   DMLabelDestroy(&subpointMap);
2886:   if (vertexLabel) {DMPlexMarkSubmesh_Uninterpolated(dm, vertexLabel, value, subpointMap, &numSubFaces, &nFV, subdm);}
2887:   /* Setup chart */
2888:   DMLabelGetStratumSize(subpointMap, 0, &numSubVertices);
2889:   DMLabelGetStratumSize(subpointMap, 2, &numSubCells);
2890:   DMPlexSetChart(subdm, 0, numSubCells+numSubFaces+numSubVertices);
2891:   DMPlexSetVTKCellHeight(subdm, 1);
2892:   /* Set cone sizes */
2893:   firstSubVertex = numSubCells;
2894:   firstSubFace   = numSubCells+numSubVertices;
2895:   newFacePoint   = firstSubFace;
2896:   DMLabelGetStratumIS(subpointMap, 0, &subvertexIS);
2897:   if (subvertexIS) {ISGetIndices(subvertexIS, &subVertices);}
2898:   DMLabelGetStratumIS(subpointMap, 2, &subcellIS);
2899:   if (subcellIS) {ISGetIndices(subcellIS, &subCells);}
2900:   for (c = 0; c < numSubCells; ++c) {
2901:     DMPlexSetConeSize(subdm, c, 1);
2902:   }
2903:   for (f = firstSubFace; f < firstSubFace+numSubFaces; ++f) {
2904:     DMPlexSetConeSize(subdm, f, nFV);
2905:   }
2906:   DMSetUp(subdm);
2907:   /* Create face cones */
2908:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
2909:   DMPlexGetMaxSizes(dm, &maxConeSize, NULL);
2910:   DMGetWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
2911:   for (c = 0; c < numSubCells; ++c) {
2912:     const PetscInt cell    = subCells[c];
2913:     const PetscInt subcell = c;
2914:     PetscInt      *closure = NULL;
2915:     PetscInt       closureSize, cl, numCorners = 0, faceSize = 0;

2917:     DMPlexGetTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2918:     for (cl = 0; cl < closureSize*2; cl += 2) {
2919:       const PetscInt point = closure[cl];
2920:       PetscInt       subVertex;

2922:       if ((point >= vStart) && (point < vEnd)) {
2923:         ++numCorners;
2924:         PetscFindInt(point, numSubVertices, subVertices, &subVertex);
2925:         if (subVertex >= 0) {
2926:           closure[faceSize] = point;
2927:           subface[faceSize] = firstSubVertex+subVertex;
2928:           ++faceSize;
2929:         }
2930:       }
2931:     }
2932:     if (faceSize > nFV) SETERRQ1(comm, PETSC_ERR_ARG_WRONG, "Invalid submesh: Too many vertices %d of an element on the surface", faceSize);
2933:     if (faceSize == nFV) {
2934:       DMPlexInsertFace_Internal(dm, subdm, faceSize, closure, subface, numCorners, cell, subcell, firstSubFace, &newFacePoint);
2935:     }
2936:     DMPlexRestoreTransitiveClosure(dm, cell, PETSC_TRUE, &closureSize, &closure);
2937:   }
2938:   DMRestoreWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
2939:   DMPlexSymmetrize(subdm);
2940:   DMPlexStratify(subdm);
2941:   /* Build coordinates */
2942:   {
2943:     PetscSection coordSection, subCoordSection;
2944:     Vec          coordinates, subCoordinates;
2945:     PetscScalar *coords, *subCoords;
2946:     PetscInt     numComp, coordSize, v;
2947:     const char  *name;

2949:     DMGetCoordinateSection(dm, &coordSection);
2950:     DMGetCoordinatesLocal(dm, &coordinates);
2951:     DMGetCoordinateSection(subdm, &subCoordSection);
2952:     PetscSectionSetNumFields(subCoordSection, 1);
2953:     PetscSectionGetFieldComponents(coordSection, 0, &numComp);
2954:     PetscSectionSetFieldComponents(subCoordSection, 0, numComp);
2955:     PetscSectionSetChart(subCoordSection, firstSubVertex, firstSubVertex+numSubVertices);
2956:     for (v = 0; v < numSubVertices; ++v) {
2957:       const PetscInt vertex    = subVertices[v];
2958:       const PetscInt subvertex = firstSubVertex+v;
2959:       PetscInt       dof;

2961:       PetscSectionGetDof(coordSection, vertex, &dof);
2962:       PetscSectionSetDof(subCoordSection, subvertex, dof);
2963:       PetscSectionSetFieldDof(subCoordSection, subvertex, 0, dof);
2964:     }
2965:     PetscSectionSetUp(subCoordSection);
2966:     PetscSectionGetStorageSize(subCoordSection, &coordSize);
2967:     VecCreate(PETSC_COMM_SELF, &subCoordinates);
2968:     PetscObjectGetName((PetscObject)coordinates,&name);
2969:     PetscObjectSetName((PetscObject)subCoordinates,name);
2970:     VecSetSizes(subCoordinates, coordSize, PETSC_DETERMINE);
2971:     VecSetType(subCoordinates,VECSTANDARD);
2972:     if (coordSize) {
2973:       VecGetArray(coordinates,    &coords);
2974:       VecGetArray(subCoordinates, &subCoords);
2975:       for (v = 0; v < numSubVertices; ++v) {
2976:         const PetscInt vertex    = subVertices[v];
2977:         const PetscInt subvertex = firstSubVertex+v;
2978:         PetscInt       dof, off, sdof, soff, d;

2980:         PetscSectionGetDof(coordSection, vertex, &dof);
2981:         PetscSectionGetOffset(coordSection, vertex, &off);
2982:         PetscSectionGetDof(subCoordSection, subvertex, &sdof);
2983:         PetscSectionGetOffset(subCoordSection, subvertex, &soff);
2984:         if (dof != sdof) SETERRQ4(comm, PETSC_ERR_PLIB, "Coordinate dimension %d on subvertex %d, vertex %d should be %d", sdof, subvertex, vertex, dof);
2985:         for (d = 0; d < dof; ++d) subCoords[soff+d] = coords[off+d];
2986:       }
2987:       VecRestoreArray(coordinates,    &coords);
2988:       VecRestoreArray(subCoordinates, &subCoords);
2989:     }
2990:     DMSetCoordinatesLocal(subdm, subCoordinates);
2991:     VecDestroy(&subCoordinates);
2992:   }
2993:   /* Cleanup */
2994:   if (subvertexIS) {ISRestoreIndices(subvertexIS, &subVertices);}
2995:   ISDestroy(&subvertexIS);
2996:   if (subcellIS) {ISRestoreIndices(subcellIS, &subCells);}
2997:   ISDestroy(&subcellIS);
2998:   return(0);
2999: }

3001: PETSC_STATIC_INLINE PetscInt DMPlexFilterPoint_Internal(PetscInt point, PetscInt firstSubPoint, PetscInt numSubPoints, const PetscInt subPoints[])
3002: {
3003:   PetscInt       subPoint;

3006:   PetscFindInt(point, numSubPoints, subPoints, &subPoint); if (ierr < 0) return ierr;
3007:   return subPoint < 0 ? subPoint : firstSubPoint+subPoint;
3008: }

3010: static PetscErrorCode DMPlexCreateSubmeshGeneric_Interpolated(DM dm, DMLabel label, PetscInt value, PetscBool markedFaces, PetscBool isCohesive, PetscInt cellHeight, DM subdm)
3011: {
3012:   MPI_Comm         comm;
3013:   DMLabel          subpointMap;
3014:   IS              *subpointIS;
3015:   const PetscInt **subpoints;
3016:   PetscInt        *numSubPoints, *firstSubPoint, *coneNew, *orntNew;
3017:   PetscInt         totSubPoints = 0, maxConeSize, dim, p, d, v;
3018:   PetscMPIInt      rank;
3019:   PetscErrorCode   ierr;

3022:   PetscObjectGetComm((PetscObject)dm,&comm);
3023:   MPI_Comm_rank(comm, &rank);
3024:   /* Create subpointMap which marks the submesh */
3025:   DMLabelCreate(PETSC_COMM_SELF, "subpoint_map", &subpointMap);
3026:   DMPlexSetSubpointMap(subdm, subpointMap);
3027:   if (cellHeight) {
3028:     if (isCohesive) {DMPlexMarkCohesiveSubmesh_Interpolated(dm, label, value, subpointMap, subdm);}
3029:     else            {DMPlexMarkSubmesh_Interpolated(dm, label, value, markedFaces, subpointMap, subdm);}
3030:   } else {
3031:     DMLabel         depth;
3032:     IS              pointIS;
3033:     const PetscInt *points;
3034:     PetscInt        numPoints;

3036:     DMPlexGetDepthLabel(dm, &depth);
3037:     DMLabelGetStratumSize(label, value, &numPoints);
3038:     DMLabelGetStratumIS(label, value, &pointIS);
3039:     ISGetIndices(pointIS, &points);
3040:     for (p = 0; p < numPoints; ++p) {
3041:       PetscInt *closure = NULL;
3042:       PetscInt  closureSize, c, pdim;

3044:       DMPlexGetTransitiveClosure(dm, points[p], PETSC_TRUE, &closureSize, &closure);
3045:       for (c = 0; c < closureSize*2; c += 2) {
3046:         DMLabelGetValue(depth, closure[c], &pdim);
3047:         DMLabelSetValue(subpointMap, closure[c], pdim);
3048:       }
3049:       DMPlexRestoreTransitiveClosure(dm, points[p], PETSC_TRUE, &closureSize, &closure);
3050:     }
3051:     ISRestoreIndices(pointIS, &points);
3052:     ISDestroy(&pointIS);
3053:   }
3054:   /* Setup chart */
3055:   DMGetDimension(dm, &dim);
3056:   PetscMalloc4(dim+1,&numSubPoints,dim+1,&firstSubPoint,dim+1,&subpointIS,dim+1,&subpoints);
3057:   for (d = 0; d <= dim; ++d) {
3058:     DMLabelGetStratumSize(subpointMap, d, &numSubPoints[d]);
3059:     totSubPoints += numSubPoints[d];
3060:   }
3061:   DMPlexSetChart(subdm, 0, totSubPoints);
3062:   DMPlexSetVTKCellHeight(subdm, cellHeight);
3063:   /* Set cone sizes */
3064:   firstSubPoint[dim] = 0;
3065:   firstSubPoint[0]   = firstSubPoint[dim] + numSubPoints[dim];
3066:   if (dim > 1) {firstSubPoint[dim-1] = firstSubPoint[0]     + numSubPoints[0];}
3067:   if (dim > 2) {firstSubPoint[dim-2] = firstSubPoint[dim-1] + numSubPoints[dim-1];}
3068:   for (d = 0; d <= dim; ++d) {
3069:     DMLabelGetStratumIS(subpointMap, d, &subpointIS[d]);
3070:     if (subpointIS[d]) {ISGetIndices(subpointIS[d], &subpoints[d]);}
3071:   }
3072:   /* We do not want this label automatically computed, instead we compute it here */
3073:   DMCreateLabel(subdm, "celltype");
3074:   for (d = 0; d <= dim; ++d) {
3075:     for (p = 0; p < numSubPoints[d]; ++p) {
3076:       const PetscInt  point    = subpoints[d][p];
3077:       const PetscInt  subpoint = firstSubPoint[d] + p;
3078:       const PetscInt *cone;
3079:       PetscInt        coneSize, coneSizeNew, c, val;
3080:       DMPolytopeType  ct;

3082:       DMPlexGetConeSize(dm, point, &coneSize);
3083:       DMPlexSetConeSize(subdm, subpoint, coneSize);
3084:       DMPlexGetCellType(dm, point, &ct);
3085:       DMPlexSetCellType(subdm, subpoint, ct);
3086:       if (cellHeight && (d == dim)) {
3087:         DMPlexGetCone(dm, point, &cone);
3088:         for (c = 0, coneSizeNew = 0; c < coneSize; ++c) {
3089:           DMLabelGetValue(subpointMap, cone[c], &val);
3090:           if (val >= 0) coneSizeNew++;
3091:         }
3092:         DMPlexSetConeSize(subdm, subpoint, coneSizeNew);
3093:         DMPlexSetCellType(subdm, subpoint, DM_POLYTOPE_FV_GHOST);
3094:       }
3095:     }
3096:   }
3097:   DMLabelDestroy(&subpointMap);
3098:   DMSetUp(subdm);
3099:   /* Set cones */
3100:   DMPlexGetMaxSizes(dm, &maxConeSize, NULL);
3101:   PetscMalloc2(maxConeSize,&coneNew,maxConeSize,&orntNew);
3102:   for (d = 0; d <= dim; ++d) {
3103:     for (p = 0; p < numSubPoints[d]; ++p) {
3104:       const PetscInt  point    = subpoints[d][p];
3105:       const PetscInt  subpoint = firstSubPoint[d] + p;
3106:       const PetscInt *cone, *ornt;
3107:       PetscInt        coneSize, subconeSize, coneSizeNew, c, subc, fornt = 0;

3109:       if (d == dim-1) {
3110:         const PetscInt *support, *cone, *ornt;
3111:         PetscInt        supportSize, coneSize, s, subc;

3113:         DMPlexGetSupport(dm, point, &support);
3114:         DMPlexGetSupportSize(dm, point, &supportSize);
3115:         for (s = 0; s < supportSize; ++s) {
3116:           PetscBool isHybrid;

3118:           DMPlexCellIsHybrid_Internal(dm, support[s], &isHybrid);
3119:           if (!isHybrid) continue;
3120:           PetscFindInt(support[s], numSubPoints[d+1], subpoints[d+1], &subc);
3121:           if (subc >= 0) {
3122:             const PetscInt ccell = subpoints[d+1][subc];

3124:             DMPlexGetCone(dm, ccell, &cone);
3125:             DMPlexGetConeSize(dm, ccell, &coneSize);
3126:             DMPlexGetConeOrientation(dm, ccell, &ornt);
3127:             for (c = 0; c < coneSize; ++c) {
3128:               if (cone[c] == point) {
3129:                 fornt = ornt[c];
3130:                 break;
3131:               }
3132:             }
3133:             break;
3134:           }
3135:         }
3136:       }
3137:       DMPlexGetConeSize(dm, point, &coneSize);
3138:       DMPlexGetConeSize(subdm, subpoint, &subconeSize);
3139:       DMPlexGetCone(dm, point, &cone);
3140:       DMPlexGetConeOrientation(dm, point, &ornt);
3141:       for (c = 0, coneSizeNew = 0; c < coneSize; ++c) {
3142:         PetscFindInt(cone[c], numSubPoints[d-1], subpoints[d-1], &subc);
3143:         if (subc >= 0) {
3144:           coneNew[coneSizeNew] = firstSubPoint[d-1] + subc;
3145:           orntNew[coneSizeNew] = ornt[c];
3146:           ++coneSizeNew;
3147:         }
3148:       }
3149:       if (coneSizeNew != subconeSize) SETERRQ2(comm, PETSC_ERR_PLIB, "Number of cone points located %d does not match subcone size %d", coneSizeNew, subconeSize);
3150:       if (fornt < 0) {
3151:         /* This should be replaced by a call to DMPlexReverseCell() */
3152: #if 0
3153:         DMPlexReverseCell(subdm, subpoint);
3154: #else
3155:         for (c = 0; c < coneSizeNew/2 + coneSizeNew%2; ++c) {
3156:           PetscInt faceSize, tmp;

3158:           tmp        = coneNew[c];
3159:           coneNew[c] = coneNew[coneSizeNew-1-c];
3160:           coneNew[coneSizeNew-1-c] = tmp;
3161:           DMPlexGetConeSize(dm, cone[c], &faceSize);
3162:           tmp        = orntNew[c] >= 0 ? -(faceSize-orntNew[c]) : faceSize+orntNew[c];
3163:           orntNew[c] = orntNew[coneSizeNew-1-c] >= 0 ? -(faceSize-orntNew[coneSizeNew-1-c]) : faceSize+orntNew[coneSizeNew-1-c];
3164:           orntNew[coneSizeNew-1-c] = tmp;
3165:         }
3166:       }
3167:       DMPlexSetCone(subdm, subpoint, coneNew);
3168:       DMPlexSetConeOrientation(subdm, subpoint, orntNew);
3169: #endif
3170:     }
3171:   }
3172:   PetscFree2(coneNew,orntNew);
3173:   DMPlexSymmetrize(subdm);
3174:   DMPlexStratify(subdm);
3175:   /* Build coordinates */
3176:   {
3177:     PetscSection coordSection, subCoordSection;
3178:     Vec          coordinates, subCoordinates;
3179:     PetscScalar *coords, *subCoords;
3180:     PetscInt     cdim, numComp, coordSize;
3181:     const char  *name;

3183:     DMGetCoordinateDim(dm, &cdim);
3184:     DMGetCoordinateSection(dm, &coordSection);
3185:     DMGetCoordinatesLocal(dm, &coordinates);
3186:     DMGetCoordinateSection(subdm, &subCoordSection);
3187:     PetscSectionSetNumFields(subCoordSection, 1);
3188:     PetscSectionGetFieldComponents(coordSection, 0, &numComp);
3189:     PetscSectionSetFieldComponents(subCoordSection, 0, numComp);
3190:     PetscSectionSetChart(subCoordSection, firstSubPoint[0], firstSubPoint[0]+numSubPoints[0]);
3191:     for (v = 0; v < numSubPoints[0]; ++v) {
3192:       const PetscInt vertex    = subpoints[0][v];
3193:       const PetscInt subvertex = firstSubPoint[0]+v;
3194:       PetscInt       dof;

3196:       PetscSectionGetDof(coordSection, vertex, &dof);
3197:       PetscSectionSetDof(subCoordSection, subvertex, dof);
3198:       PetscSectionSetFieldDof(subCoordSection, subvertex, 0, dof);
3199:     }
3200:     PetscSectionSetUp(subCoordSection);
3201:     PetscSectionGetStorageSize(subCoordSection, &coordSize);
3202:     VecCreate(PETSC_COMM_SELF, &subCoordinates);
3203:     PetscObjectGetName((PetscObject)coordinates,&name);
3204:     PetscObjectSetName((PetscObject)subCoordinates,name);
3205:     VecSetSizes(subCoordinates, coordSize, PETSC_DETERMINE);
3206:     VecSetBlockSize(subCoordinates, cdim);
3207:     VecSetType(subCoordinates,VECSTANDARD);
3208:     VecGetArray(coordinates,    &coords);
3209:     VecGetArray(subCoordinates, &subCoords);
3210:     for (v = 0; v < numSubPoints[0]; ++v) {
3211:       const PetscInt vertex    = subpoints[0][v];
3212:       const PetscInt subvertex = firstSubPoint[0]+v;
3213:       PetscInt dof, off, sdof, soff, d;

3215:       PetscSectionGetDof(coordSection, vertex, &dof);
3216:       PetscSectionGetOffset(coordSection, vertex, &off);
3217:       PetscSectionGetDof(subCoordSection, subvertex, &sdof);
3218:       PetscSectionGetOffset(subCoordSection, subvertex, &soff);
3219:       if (dof != sdof) SETERRQ4(comm, PETSC_ERR_PLIB, "Coordinate dimension %d on subvertex %d, vertex %d should be %d", sdof, subvertex, vertex, dof);
3220:       for (d = 0; d < dof; ++d) subCoords[soff+d] = coords[off+d];
3221:     }
3222:     VecRestoreArray(coordinates,    &coords);
3223:     VecRestoreArray(subCoordinates, &subCoords);
3224:     DMSetCoordinatesLocal(subdm, subCoordinates);
3225:     VecDestroy(&subCoordinates);
3226:   }
3227:   /* Build SF: We need this complexity because subpoints might not be selected on the owning process */
3228:   {
3229:     PetscSF            sfPoint, sfPointSub;
3230:     IS                 subpIS;
3231:     const PetscSFNode *remotePoints;
3232:     PetscSFNode       *sremotePoints, *newLocalPoints, *newOwners;
3233:     const PetscInt    *localPoints, *subpoints;
3234:     PetscInt          *slocalPoints;
3235:     PetscInt           numRoots, numLeaves, numSubpoints = 0, numSubroots, numSubleaves = 0, l, sl, ll, pStart, pEnd, p;
3236:     PetscMPIInt        rank;

3238:     MPI_Comm_rank(PetscObjectComm((PetscObject) dm), &rank);
3239:     DMGetPointSF(dm, &sfPoint);
3240:     DMGetPointSF(subdm, &sfPointSub);
3241:     DMPlexGetChart(dm, &pStart, &pEnd);
3242:     DMPlexGetChart(subdm, NULL, &numSubroots);
3243:     DMPlexGetSubpointIS(subdm, &subpIS);
3244:     if (subpIS) {
3245:       ISGetIndices(subpIS, &subpoints);
3246:       ISGetLocalSize(subpIS, &numSubpoints);
3247:     }
3248:     PetscSFGetGraph(sfPoint, &numRoots, &numLeaves, &localPoints, &remotePoints);
3249:     if (numRoots >= 0) {
3250:       PetscMalloc2(pEnd-pStart,&newLocalPoints,numRoots,&newOwners);
3251:       for (p = 0; p < pEnd-pStart; ++p) {
3252:         newLocalPoints[p].rank  = -2;
3253:         newLocalPoints[p].index = -2;
3254:       }
3255:       /* Set subleaves */
3256:       for (l = 0; l < numLeaves; ++l) {
3257:         const PetscInt point    = localPoints[l];
3258:         const PetscInt subpoint = DMPlexFilterPoint_Internal(point, 0, numSubpoints, subpoints);

3260:         if (subpoint < 0) continue;
3261:         newLocalPoints[point-pStart].rank  = rank;
3262:         newLocalPoints[point-pStart].index = subpoint;
3263:         ++numSubleaves;
3264:       }
3265:       /* Must put in owned subpoints */
3266:       for (p = pStart; p < pEnd; ++p) {
3267:         const PetscInt subpoint = DMPlexFilterPoint_Internal(p, 0, numSubpoints, subpoints);

3269:         if (subpoint < 0) {
3270:           newOwners[p-pStart].rank  = -3;
3271:           newOwners[p-pStart].index = -3;
3272:         } else {
3273:           newOwners[p-pStart].rank  = rank;
3274:           newOwners[p-pStart].index = subpoint;
3275:         }
3276:       }
3277:       PetscSFReduceBegin(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3278:       PetscSFReduceEnd(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3279:       PetscSFBcastBegin(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3280:       PetscSFBcastEnd(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3281:       PetscMalloc1(numSubleaves, &slocalPoints);
3282:       PetscMalloc1(numSubleaves, &sremotePoints);
3283:       for (l = 0, sl = 0, ll = 0; l < numLeaves; ++l) {
3284:         const PetscInt point    = localPoints[l];
3285:         const PetscInt subpoint = DMPlexFilterPoint_Internal(point, 0, numSubpoints, subpoints);

3287:         if (subpoint < 0) continue;
3288:         if (newLocalPoints[point].rank == rank) {++ll; continue;}
3289:         slocalPoints[sl]        = subpoint;
3290:         sremotePoints[sl].rank  = newLocalPoints[point].rank;
3291:         sremotePoints[sl].index = newLocalPoints[point].index;
3292:         if (sremotePoints[sl].rank  < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote rank for local point %d", point);
3293:         if (sremotePoints[sl].index < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote subpoint for local point %d", point);
3294:         ++sl;
3295:       }
3296:       if (sl + ll != numSubleaves) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Mismatch in number of subleaves %d + %d != %d", sl, ll, numSubleaves);
3297:       PetscFree2(newLocalPoints,newOwners);
3298:       PetscSFSetGraph(sfPointSub, numSubroots, sl, slocalPoints, PETSC_OWN_POINTER, sremotePoints, PETSC_OWN_POINTER);
3299:     }
3300:     if (subpIS) {
3301:       ISRestoreIndices(subpIS, &subpoints);
3302:     }
3303:   }
3304:   /* Cleanup */
3305:   for (d = 0; d <= dim; ++d) {
3306:     if (subpointIS[d]) {ISRestoreIndices(subpointIS[d], &subpoints[d]);}
3307:     ISDestroy(&subpointIS[d]);
3308:   }
3309:   PetscFree4(numSubPoints,firstSubPoint,subpointIS,subpoints);
3310:   return(0);
3311: }

3313: static PetscErrorCode DMPlexCreateSubmesh_Interpolated(DM dm, DMLabel vertexLabel, PetscInt value, PetscBool markedFaces, DM subdm)
3314: {

3318:   DMPlexCreateSubmeshGeneric_Interpolated(dm, vertexLabel, value, markedFaces, PETSC_FALSE, 1, subdm);
3319:   return(0);
3320: }

3322: /*@
3323:   DMPlexCreateSubmesh - Extract a hypersurface from the mesh using vertices defined by a label

3325:   Input Parameters:
3326: + dm           - The original mesh
3327: . vertexLabel  - The DMLabel marking points contained in the surface
3328: . value        - The label value to use
3329: - markedFaces  - PETSC_TRUE if surface faces are marked in addition to vertices, PETSC_FALSE if only vertices are marked

3331:   Output Parameter:
3332: . subdm - The surface mesh

3334:   Note: This function produces a DMLabel mapping original points in the submesh to their depth. This can be obtained using DMPlexGetSubpointMap().

3336:   Level: developer

3338: .seealso: DMPlexGetSubpointMap(), DMGetLabel(), DMLabelSetValue()
3339: @*/
3340: PetscErrorCode DMPlexCreateSubmesh(DM dm, DMLabel vertexLabel, PetscInt value, PetscBool markedFaces, DM *subdm)
3341: {
3342:   DMPlexInterpolatedFlag interpolated;
3343:   PetscInt       dim, cdim;

3349:   DMGetDimension(dm, &dim);
3350:   DMCreate(PetscObjectComm((PetscObject)dm), subdm);
3351:   DMSetType(*subdm, DMPLEX);
3352:   DMSetDimension(*subdm, dim-1);
3353:   DMGetCoordinateDim(dm, &cdim);
3354:   DMSetCoordinateDim(*subdm, cdim);
3355:   DMPlexIsInterpolated(dm, &interpolated);
3356:   if (interpolated == DMPLEX_INTERPOLATED_PARTIAL) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Not for partially interpolated meshes");
3357:   if (interpolated) {
3358:     DMPlexCreateSubmesh_Interpolated(dm, vertexLabel, value, markedFaces, *subdm);
3359:   } else {
3360:     DMPlexCreateSubmesh_Uninterpolated(dm, vertexLabel, value, *subdm);
3361:   }
3362:   return(0);
3363: }

3365: static PetscErrorCode DMPlexCreateCohesiveSubmesh_Uninterpolated(DM dm, PetscBool hasLagrange, const char label[], PetscInt value, DM subdm)
3366: {
3367:   MPI_Comm        comm;
3368:   DMLabel         subpointMap;
3369:   IS              subvertexIS;
3370:   const PetscInt *subVertices;
3371:   PetscInt        numSubVertices, firstSubVertex, numSubCells, *subCells = NULL;
3372:   PetscInt       *subface, maxConeSize, numSubFaces, firstSubFace, newFacePoint, nFV;
3373:   PetscInt        c, f;
3374:   PetscErrorCode  ierr;

3377:   PetscObjectGetComm((PetscObject)dm, &comm);
3378:   /* Create subpointMap which marks the submesh */
3379:   DMLabelCreate(PETSC_COMM_SELF, "subpoint_map", &subpointMap);
3380:   DMPlexSetSubpointMap(subdm, subpointMap);
3381:   DMLabelDestroy(&subpointMap);
3382:   DMPlexMarkCohesiveSubmesh_Uninterpolated(dm, hasLagrange, label, value, subpointMap, &numSubFaces, &nFV, &subCells, subdm);
3383:   /* Setup chart */
3384:   DMLabelGetStratumSize(subpointMap, 0, &numSubVertices);
3385:   DMLabelGetStratumSize(subpointMap, 2, &numSubCells);
3386:   DMPlexSetChart(subdm, 0, numSubCells+numSubFaces+numSubVertices);
3387:   DMPlexSetVTKCellHeight(subdm, 1);
3388:   /* Set cone sizes */
3389:   firstSubVertex = numSubCells;
3390:   firstSubFace   = numSubCells+numSubVertices;
3391:   newFacePoint   = firstSubFace;
3392:   DMLabelGetStratumIS(subpointMap, 0, &subvertexIS);
3393:   if (subvertexIS) {ISGetIndices(subvertexIS, &subVertices);}
3394:   for (c = 0; c < numSubCells; ++c) {
3395:     DMPlexSetConeSize(subdm, c, 1);
3396:   }
3397:   for (f = firstSubFace; f < firstSubFace+numSubFaces; ++f) {
3398:     DMPlexSetConeSize(subdm, f, nFV);
3399:   }
3400:   DMSetUp(subdm);
3401:   /* Create face cones */
3402:   DMPlexGetMaxSizes(dm, &maxConeSize, NULL);
3403:   DMGetWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
3404:   for (c = 0; c < numSubCells; ++c) {
3405:     const PetscInt  cell    = subCells[c];
3406:     const PetscInt  subcell = c;
3407:     const PetscInt *cone, *cells;
3408:     PetscBool       isHybrid;
3409:     PetscInt        numCells, subVertex, p, v;

3411:     DMPlexCellIsHybrid_Internal(dm, cell, &isHybrid);
3412:     if (!isHybrid) continue;
3413:     DMPlexGetCone(dm, cell, &cone);
3414:     for (v = 0; v < nFV; ++v) {
3415:       PetscFindInt(cone[v], numSubVertices, subVertices, &subVertex);
3416:       subface[v] = firstSubVertex+subVertex;
3417:     }
3418:     DMPlexSetCone(subdm, newFacePoint, subface);
3419:     DMPlexSetCone(subdm, subcell, &newFacePoint);
3420:     DMPlexGetJoin(dm, nFV, cone, &numCells, &cells);
3421:     /* Not true in parallel
3422:     if (numCells != 2) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cohesive cells should separate two cells"); */
3423:     for (p = 0; p < numCells; ++p) {
3424:       PetscInt  negsubcell;
3425:       PetscBool isHybrid;

3427:       DMPlexCellIsHybrid_Internal(dm, cells[p], &isHybrid);
3428:       if (isHybrid) continue;
3429:       /* I know this is a crap search */
3430:       for (negsubcell = 0; negsubcell < numSubCells; ++negsubcell) {
3431:         if (subCells[negsubcell] == cells[p]) break;
3432:       }
3433:       if (negsubcell == numSubCells) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Could not find negative face neighbor for cohesive cell %d", cell);
3434:       DMPlexSetCone(subdm, negsubcell, &newFacePoint);
3435:     }
3436:     DMPlexRestoreJoin(dm, nFV, cone, &numCells, &cells);
3437:     ++newFacePoint;
3438:   }
3439:   DMRestoreWorkArray(subdm, maxConeSize, MPIU_INT, (void**) &subface);
3440:   DMPlexSymmetrize(subdm);
3441:   DMPlexStratify(subdm);
3442:   /* Build coordinates */
3443:   {
3444:     PetscSection coordSection, subCoordSection;
3445:     Vec          coordinates, subCoordinates;
3446:     PetscScalar *coords, *subCoords;
3447:     PetscInt     cdim, numComp, coordSize, v;
3448:     const char  *name;

3450:     DMGetCoordinateDim(dm, &cdim);
3451:     DMGetCoordinateSection(dm, &coordSection);
3452:     DMGetCoordinatesLocal(dm, &coordinates);
3453:     DMGetCoordinateSection(subdm, &subCoordSection);
3454:     PetscSectionSetNumFields(subCoordSection, 1);
3455:     PetscSectionGetFieldComponents(coordSection, 0, &numComp);
3456:     PetscSectionSetFieldComponents(subCoordSection, 0, numComp);
3457:     PetscSectionSetChart(subCoordSection, firstSubVertex, firstSubVertex+numSubVertices);
3458:     for (v = 0; v < numSubVertices; ++v) {
3459:       const PetscInt vertex    = subVertices[v];
3460:       const PetscInt subvertex = firstSubVertex+v;
3461:       PetscInt       dof;

3463:       PetscSectionGetDof(coordSection, vertex, &dof);
3464:       PetscSectionSetDof(subCoordSection, subvertex, dof);
3465:       PetscSectionSetFieldDof(subCoordSection, subvertex, 0, dof);
3466:     }
3467:     PetscSectionSetUp(subCoordSection);
3468:     PetscSectionGetStorageSize(subCoordSection, &coordSize);
3469:     VecCreate(PETSC_COMM_SELF, &subCoordinates);
3470:     PetscObjectGetName((PetscObject)coordinates,&name);
3471:     PetscObjectSetName((PetscObject)subCoordinates,name);
3472:     VecSetSizes(subCoordinates, coordSize, PETSC_DETERMINE);
3473:     VecSetBlockSize(subCoordinates, cdim);
3474:     VecSetType(subCoordinates,VECSTANDARD);
3475:     VecGetArray(coordinates,    &coords);
3476:     VecGetArray(subCoordinates, &subCoords);
3477:     for (v = 0; v < numSubVertices; ++v) {
3478:       const PetscInt vertex    = subVertices[v];
3479:       const PetscInt subvertex = firstSubVertex+v;
3480:       PetscInt       dof, off, sdof, soff, d;

3482:       PetscSectionGetDof(coordSection, vertex, &dof);
3483:       PetscSectionGetOffset(coordSection, vertex, &off);
3484:       PetscSectionGetDof(subCoordSection, subvertex, &sdof);
3485:       PetscSectionGetOffset(subCoordSection, subvertex, &soff);
3486:       if (dof != sdof) SETERRQ4(comm, PETSC_ERR_PLIB, "Coordinate dimension %d on subvertex %d, vertex %d should be %d", sdof, subvertex, vertex, dof);
3487:       for (d = 0; d < dof; ++d) subCoords[soff+d] = coords[off+d];
3488:     }
3489:     VecRestoreArray(coordinates,    &coords);
3490:     VecRestoreArray(subCoordinates, &subCoords);
3491:     DMSetCoordinatesLocal(subdm, subCoordinates);
3492:     VecDestroy(&subCoordinates);
3493:   }
3494:   /* Build SF */
3495:   CHKMEMQ;
3496:   {
3497:     PetscSF            sfPoint, sfPointSub;
3498:     const PetscSFNode *remotePoints;
3499:     PetscSFNode       *sremotePoints, *newLocalPoints, *newOwners;
3500:     const PetscInt    *localPoints;
3501:     PetscInt          *slocalPoints;
3502:     PetscInt           numRoots, numLeaves, numSubRoots = numSubCells+numSubFaces+numSubVertices, numSubLeaves = 0, l, sl, ll, pStart, pEnd, p, vStart, vEnd;
3503:     PetscMPIInt        rank;

3505:     MPI_Comm_rank(PetscObjectComm((PetscObject) dm), &rank);
3506:     DMGetPointSF(dm, &sfPoint);
3507:     DMGetPointSF(subdm, &sfPointSub);
3508:     DMPlexGetChart(dm, &pStart, &pEnd);
3509:     DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
3510:     PetscSFGetGraph(sfPoint, &numRoots, &numLeaves, &localPoints, &remotePoints);
3511:     if (numRoots >= 0) {
3512:       /* Only vertices should be shared */
3513:       PetscMalloc2(pEnd-pStart,&newLocalPoints,numRoots,&newOwners);
3514:       for (p = 0; p < pEnd-pStart; ++p) {
3515:         newLocalPoints[p].rank  = -2;
3516:         newLocalPoints[p].index = -2;
3517:       }
3518:       /* Set subleaves */
3519:       for (l = 0; l < numLeaves; ++l) {
3520:         const PetscInt point    = localPoints[l];
3521:         const PetscInt subPoint = DMPlexFilterPoint_Internal(point, firstSubVertex, numSubVertices, subVertices);

3523:         if ((point < vStart) && (point >= vEnd)) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Should not be mapping anything but vertices, %d", point);
3524:         if (subPoint < 0) continue;
3525:         newLocalPoints[point-pStart].rank  = rank;
3526:         newLocalPoints[point-pStart].index = subPoint;
3527:         ++numSubLeaves;
3528:       }
3529:       /* Must put in owned subpoints */
3530:       for (p = pStart; p < pEnd; ++p) {
3531:         const PetscInt subPoint = DMPlexFilterPoint_Internal(p, firstSubVertex, numSubVertices, subVertices);

3533:         if (subPoint < 0) {
3534:           newOwners[p-pStart].rank  = -3;
3535:           newOwners[p-pStart].index = -3;
3536:         } else {
3537:           newOwners[p-pStart].rank  = rank;
3538:           newOwners[p-pStart].index = subPoint;
3539:         }
3540:       }
3541:       PetscSFReduceBegin(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3542:       PetscSFReduceEnd(sfPoint, MPIU_2INT, newLocalPoints, newOwners, MPI_MAXLOC);
3543:       PetscSFBcastBegin(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3544:       PetscSFBcastEnd(sfPoint, MPIU_2INT, newOwners, newLocalPoints);
3545:       PetscMalloc1(numSubLeaves,    &slocalPoints);
3546:       PetscMalloc1(numSubLeaves, &sremotePoints);
3547:       for (l = 0, sl = 0, ll = 0; l < numLeaves; ++l) {
3548:         const PetscInt point    = localPoints[l];
3549:         const PetscInt subPoint = DMPlexFilterPoint_Internal(point, firstSubVertex, numSubVertices, subVertices);

3551:         if (subPoint < 0) continue;
3552:         if (newLocalPoints[point].rank == rank) {++ll; continue;}
3553:         slocalPoints[sl]        = subPoint;
3554:         sremotePoints[sl].rank  = newLocalPoints[point].rank;
3555:         sremotePoints[sl].index = newLocalPoints[point].index;
3556:         if (sremotePoints[sl].rank  < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote rank for local point %d", point);
3557:         if (sremotePoints[sl].index < 0) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid remote subpoint for local point %d", point);
3558:         ++sl;
3559:       }
3560:       PetscFree2(newLocalPoints,newOwners);
3561:       if (sl + ll != numSubLeaves) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Mismatch in number of subleaves %d + %d != %d", sl, ll, numSubLeaves);
3562:       PetscSFSetGraph(sfPointSub, numSubRoots, sl, slocalPoints, PETSC_OWN_POINTER, sremotePoints, PETSC_OWN_POINTER);
3563:     }
3564:   }
3565:   CHKMEMQ;
3566:   /* Cleanup */
3567:   if (subvertexIS) {ISRestoreIndices(subvertexIS, &subVertices);}
3568:   ISDestroy(&subvertexIS);
3569:   PetscFree(subCells);
3570:   return(0);
3571: }

3573: static PetscErrorCode DMPlexCreateCohesiveSubmesh_Interpolated(DM dm, const char labelname[], PetscInt value, DM subdm)
3574: {
3575:   DMLabel        label = NULL;

3579:   if (labelname) {DMGetLabel(dm, labelname, &label);}
3580:   DMPlexCreateSubmeshGeneric_Interpolated(dm, label, value, PETSC_FALSE, PETSC_TRUE, 1, subdm);
3581:   return(0);
3582: }

3584: /*@C
3585:   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.

3587:   Input Parameters:
3588: + dm          - The original mesh
3589: . hasLagrange - The mesh has Lagrange unknowns in the cohesive cells
3590: . label       - A label name, or NULL
3591: - value  - A label value

3593:   Output Parameter:
3594: . subdm - The surface mesh

3596:   Note: This function produces a DMLabel mapping original points in the submesh to their depth. This can be obtained using DMPlexGetSubpointMap().

3598:   Level: developer

3600: .seealso: DMPlexGetSubpointMap(), DMPlexCreateSubmesh()
3601: @*/
3602: PetscErrorCode DMPlexCreateCohesiveSubmesh(DM dm, PetscBool hasLagrange, const char label[], PetscInt value, DM *subdm)
3603: {
3604:   PetscInt       dim, cdim, depth;

3610:   DMGetDimension(dm, &dim);
3611:   DMPlexGetDepth(dm, &depth);
3612:   DMCreate(PetscObjectComm((PetscObject)dm), subdm);
3613:   DMSetType(*subdm, DMPLEX);
3614:   DMSetDimension(*subdm, dim-1);
3615:   DMGetCoordinateDim(dm, &cdim);
3616:   DMSetCoordinateDim(*subdm, cdim);
3617:   if (depth == dim) {
3618:     DMPlexCreateCohesiveSubmesh_Interpolated(dm, label, value, *subdm);
3619:   } else {
3620:     DMPlexCreateCohesiveSubmesh_Uninterpolated(dm, hasLagrange, label, value, *subdm);
3621:   }
3622:   return(0);
3623: }

3625: /*@
3626:   DMPlexFilter - Extract a subset of mesh cells defined by a label as a separate mesh

3628:   Input Parameters:
3629: + dm        - The original mesh
3630: . cellLabel - The DMLabel marking cells contained in the new mesh
3631: - value     - The label value to use

3633:   Output Parameter:
3634: . subdm - The new mesh

3636:   Note: This function produces a DMLabel mapping original points in the submesh to their depth. This can be obtained using DMPlexGetSubpointMap().

3638:   Level: developer

3640: .seealso: DMPlexGetSubpointMap(), DMGetLabel(), DMLabelSetValue()
3641: @*/
3642: PetscErrorCode DMPlexFilter(DM dm, DMLabel cellLabel, PetscInt value, DM *subdm)
3643: {
3644:   PetscInt       dim;

3650:   DMGetDimension(dm, &dim);
3651:   DMCreate(PetscObjectComm((PetscObject) dm), subdm);
3652:   DMSetType(*subdm, DMPLEX);
3653:   DMSetDimension(*subdm, dim);
3654:   /* Extract submesh in place, could be empty on some procs, could have inconsistency if procs do not both extract a shared cell */
3655:   DMPlexCreateSubmeshGeneric_Interpolated(dm, cellLabel, value, PETSC_FALSE, PETSC_FALSE, 0, *subdm);
3656:   return(0);
3657: }

3659: /*@
3660:   DMPlexGetSubpointMap - Returns a DMLabel with point dimension as values

3662:   Input Parameter:
3663: . dm - The submesh DM

3665:   Output Parameter:
3666: . subpointMap - The DMLabel of all the points from the original mesh in this submesh, or NULL if this is not a submesh

3668:   Level: developer

3670: .seealso: DMPlexCreateSubmesh(), DMPlexGetSubpointIS()
3671: @*/
3672: PetscErrorCode DMPlexGetSubpointMap(DM dm, DMLabel *subpointMap)
3673: {
3677:   *subpointMap = ((DM_Plex*) dm->data)->subpointMap;
3678:   return(0);
3679: }

3681: /*@
3682:   DMPlexSetSubpointMap - Sets the DMLabel with point dimension as values

3684:   Input Parameters:
3685: + dm - The submesh DM
3686: - subpointMap - The DMLabel of all the points from the original mesh in this submesh

3688:   Note: Should normally not be called by the user, since it is set in DMPlexCreateSubmesh()

3690:   Level: developer

3692: .seealso: DMPlexCreateSubmesh(), DMPlexGetSubpointIS()
3693: @*/
3694: PetscErrorCode DMPlexSetSubpointMap(DM dm, DMLabel subpointMap)
3695: {
3696:   DM_Plex       *mesh = (DM_Plex *) dm->data;
3697:   DMLabel        tmp;

3702:   tmp  = mesh->subpointMap;
3703:   mesh->subpointMap = subpointMap;
3704:   PetscObjectReference((PetscObject) mesh->subpointMap);
3705:   DMLabelDestroy(&tmp);
3706:   return(0);
3707: }

3709: static PetscErrorCode DMPlexCreateSubpointIS_Internal(DM dm, IS *subpointIS)
3710: {
3711:   DMLabel        spmap;
3712:   PetscInt       depth, d;

3716:   DMPlexGetSubpointMap(dm, &spmap);
3717:   DMPlexGetDepth(dm, &depth);
3718:   if (spmap && depth >= 0) {
3719:     DM_Plex  *mesh = (DM_Plex *) dm->data;
3720:     PetscInt *points, *depths;
3721:     PetscInt  pStart, pEnd, p, off;

3723:     DMPlexGetChart(dm, &pStart, &pEnd);
3724:     if (pStart) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Submeshes must start the point numbering at 0, not %d", pStart);
3725:     PetscMalloc1(pEnd, &points);
3726:     DMGetWorkArray(dm, depth+1, MPIU_INT, &depths);
3727:     depths[0] = depth;
3728:     depths[1] = 0;
3729:     for(d = 2; d <= depth; ++d) {depths[d] = depth+1 - d;}
3730:     for(d = 0, off = 0; d <= depth; ++d) {
3731:       const PetscInt dep = depths[d];
3732:       PetscInt       depStart, depEnd, n;

3734:       DMPlexGetDepthStratum(dm, dep, &depStart, &depEnd);
3735:       DMLabelGetStratumSize(spmap, dep, &n);
3736:       if (((d < 2) && (depth > 1)) || (d == 1)) { /* Only check vertices and cells for now since the map is broken for others */
3737:         if (n != depEnd-depStart) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "The number of mapped submesh points %d at depth %d should be %d", n, dep, depEnd-depStart);
3738:       } else {
3739:         if (!n) {
3740:           if (d == 0) {
3741:             /* Missing cells */
3742:             for(p = 0; p < depEnd-depStart; ++p, ++off) points[off] = -1;
3743:           } else {
3744:             /* Missing faces */
3745:             for(p = 0; p < depEnd-depStart; ++p, ++off) points[off] = PETSC_MAX_INT;
3746:           }
3747:         }
3748:       }
3749:       if (n) {
3750:         IS              is;
3751:         const PetscInt *opoints;

3753:         DMLabelGetStratumIS(spmap, dep, &is);
3754:         ISGetIndices(is, &opoints);
3755:         for(p = 0; p < n; ++p, ++off) points[off] = opoints[p];
3756:         ISRestoreIndices(is, &opoints);
3757:         ISDestroy(&is);
3758:       }
3759:     }
3760:     DMRestoreWorkArray(dm, depth+1, MPIU_INT, &depths);
3761:     if (off != pEnd) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "The number of mapped submesh points %d should be %d", off, pEnd);
3762:     ISCreateGeneral(PETSC_COMM_SELF, pEnd, points, PETSC_OWN_POINTER, subpointIS);
3763:     PetscObjectStateGet((PetscObject) spmap, &mesh->subpointState);
3764:   }
3765:   return(0);
3766: }

3768: /*@
3769:   DMPlexGetSubpointIS - Returns an IS covering the entire subdm chart with the original points as data

3771:   Input Parameter:
3772: . dm - The submesh DM

3774:   Output Parameter:
3775: . subpointIS - The IS of all the points from the original mesh in this submesh, or NULL if this is not a submesh

3777:   Note: This IS is guaranteed to be sorted by the construction of the submesh

3779:   Level: developer

3781: .seealso: DMPlexCreateSubmesh(), DMPlexGetSubpointMap()
3782: @*/
3783: PetscErrorCode DMPlexGetSubpointIS(DM dm, IS *subpointIS)
3784: {
3785:   DM_Plex         *mesh = (DM_Plex *) dm->data;
3786:   DMLabel          spmap;
3787:   PetscObjectState state;
3788:   PetscErrorCode   ierr;

3793:   DMPlexGetSubpointMap(dm, &spmap);
3794:   PetscObjectStateGet((PetscObject) spmap, &state);
3795:   if (state != mesh->subpointState || !mesh->subpointIS) {DMPlexCreateSubpointIS_Internal(dm, &mesh->subpointIS);}
3796:   *subpointIS = mesh->subpointIS;
3797:   return(0);
3798: }

3800: /*@
3801:   DMGetEnclosureRelation - Get the relationship between dmA and dmB

3803:   Input Parameters:
3804: + dmA - The first DM
3805: - dmB - The second DM

3807:   Output Parameter:
3808: . rel - The relation of dmA to dmB

3810:   Level: intermediate

3812: .seealso: DMPlexGetEnclosurePoint()
3813: @*/
3814: PetscErrorCode DMGetEnclosureRelation(DM dmA, DM dmB, DMEnclosureType *rel)
3815: {
3816:   DM             plexA, plexB, sdm;
3817:   DMLabel        spmap;
3818:   PetscInt       pStartA, pEndA, pStartB, pEndB, NpA, NpB;

3823:   *rel = DM_ENC_NONE;
3824:   if (!dmA || !dmB) return(0);
3827:   if (dmA == dmB) {*rel = DM_ENC_EQUALITY; return(0);}
3828:   DMConvert(dmA, DMPLEX, &plexA);
3829:   DMConvert(dmB, DMPLEX, &plexB);
3830:   DMPlexGetChart(plexA, &pStartA, &pEndA);
3831:   DMPlexGetChart(plexB, &pStartB, &pEndB);
3832:   /* Assumption 1: subDMs have smaller charts than the DMs that they originate from
3833:     - The degenerate case of a subdomain which includes all of the domain on some process can be treated as equality */
3834:   if ((pStartA == pStartB) && (pEndA == pEndB)) {
3835:     *rel = DM_ENC_EQUALITY;
3836:     goto end;
3837:   }
3838:   NpA = pEndA - pStartA;
3839:   NpB = pEndB - pStartB;
3840:   if (NpA == NpB) goto end;
3841:   sdm = NpA > NpB ? plexB : plexA; /* The other is the original, enclosing dm */
3842:   DMPlexGetSubpointMap(sdm, &spmap);
3843:   if (!spmap) goto end;
3844:   /* TODO Check the space mapped to by subpointMap is same size as dm */
3845:   if (NpA > NpB) {
3846:     *rel = DM_ENC_SUPERMESH;
3847:   } else {
3848:     *rel = DM_ENC_SUBMESH;
3849:   }
3850:   end:
3851:   DMDestroy(&plexA);
3852:   DMDestroy(&plexB);
3853:   return(0);
3854: }

3856: /*@
3857:   DMGetEnclosurePoint - Get the point pA in dmA which corresponds to the point pB in dmB

3859:   Input Parameters:
3860: + dmA   - The first DM
3861: . dmB   - The second DM
3862: . etype - The type of enclosure relation that dmA has to dmB
3863: - pB    - A point of dmB

3865:   Output Parameter:
3866: . pA    - The corresponding point of dmA

3868:   Level: intermediate

3870: .seealso: DMGetEnclosureRelation()
3871: @*/
3872: PetscErrorCode DMGetEnclosurePoint(DM dmA, DM dmB, DMEnclosureType etype, PetscInt pB, PetscInt *pA)
3873: {
3874:   DM              sdm;
3875:   IS              subpointIS;
3876:   const PetscInt *subpoints;
3877:   PetscInt        numSubpoints;
3878:   PetscErrorCode  ierr;

3881:   /* TODO Cache the IS, making it look like an index */
3882:   switch (etype) {
3883:     case DM_ENC_SUPERMESH:
3884:     sdm  = dmB;
3885:     DMPlexGetSubpointIS(sdm, &subpointIS);
3886:     ISGetIndices(subpointIS, &subpoints);
3887:     *pA  = subpoints[pB];
3888:     ISRestoreIndices(subpointIS, &subpoints);
3889:     break;
3890:     case DM_ENC_SUBMESH:
3891:     sdm  = dmA;
3892:     DMPlexGetSubpointIS(sdm, &subpointIS);
3893:     ISGetLocalSize(subpointIS, &numSubpoints);
3894:     ISGetIndices(subpointIS, &subpoints);
3895:     PetscFindInt(pB, numSubpoints, subpoints, pA);
3896:     if (*pA < 0) {
3897:       DMViewFromOptions(dmA, NULL, "-dm_enc_A_view");
3898:       DMViewFromOptions(dmB, NULL, "-dm_enc_B_view");
3899:       SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Point %d not found in submesh", pB);
3900:     }
3901:     ISRestoreIndices(subpointIS, &subpoints);
3902:     break;
3903:     case DM_ENC_EQUALITY:
3904:     case DM_ENC_NONE:
3905:     *pA = pB;break;
3906:     case DM_ENC_UNKNOWN:
3907:     {
3908:       DMEnclosureType enc;

3910:       DMGetEnclosureRelation(dmA, dmB, &enc);
3911:       DMGetEnclosurePoint(dmA, dmB, enc, pB, pA);
3912:     }
3913:     break;
3914:     default: SETERRQ1(PetscObjectComm((PetscObject) dmA), PETSC_ERR_ARG_OUTOFRANGE, "Invalid enclosure type %d", (int) etype);
3915:   }
3916:   return(0);
3917: }