Actual source code: dmcoordinates.c

  1: #include <petsc/private/dmimpl.h>

  3: #include <petscdmplex.h>
  4: #include <petscsf.h>

  6: PetscErrorCode DMRestrictHook_Coordinates(DM dm, DM dmc, void *ctx)
  7: {
  8:   DM  dm_coord, dmc_coord;
  9:   Vec coords, ccoords;
 10:   Mat inject;

 12:   PetscFunctionBegin;
 13:   PetscCall(DMGetCoordinateDM(dm, &dm_coord));
 14:   PetscCall(DMGetCoordinateDM(dmc, &dmc_coord));
 15:   PetscCall(DMGetCoordinates(dm, &coords));
 16:   PetscCall(DMGetCoordinates(dmc, &ccoords));
 17:   if (coords && !ccoords) {
 18:     PetscCall(DMCreateGlobalVector(dmc_coord, &ccoords));
 19:     PetscCall(PetscObjectSetName((PetscObject)ccoords, "coordinates"));
 20:     PetscCall(DMCreateInjection(dmc_coord, dm_coord, &inject));
 21:     PetscCall(MatRestrict(inject, coords, ccoords));
 22:     PetscCall(MatDestroy(&inject));
 23:     PetscCall(DMSetCoordinates(dmc, ccoords));
 24:     PetscCall(VecDestroy(&ccoords));
 25:   }
 26:   PetscFunctionReturn(PETSC_SUCCESS);
 27: }

 29: static PetscErrorCode DMSubDomainHook_Coordinates(DM dm, DM subdm, void *ctx)
 30: {
 31:   DM          dm_coord, subdm_coord;
 32:   Vec         coords, ccoords, clcoords;
 33:   VecScatter *scat_i, *scat_g;

 35:   PetscFunctionBegin;
 36:   PetscCall(DMGetCoordinateDM(dm, &dm_coord));
 37:   PetscCall(DMGetCoordinateDM(subdm, &subdm_coord));
 38:   PetscCall(DMGetCoordinates(dm, &coords));
 39:   PetscCall(DMGetCoordinates(subdm, &ccoords));
 40:   if (coords && !ccoords) {
 41:     PetscCall(DMCreateGlobalVector(subdm_coord, &ccoords));
 42:     PetscCall(PetscObjectSetName((PetscObject)ccoords, "coordinates"));
 43:     PetscCall(DMCreateLocalVector(subdm_coord, &clcoords));
 44:     PetscCall(PetscObjectSetName((PetscObject)clcoords, "coordinates"));
 45:     PetscCall(DMCreateDomainDecompositionScatters(dm_coord, 1, &subdm_coord, NULL, &scat_i, &scat_g));
 46:     PetscCall(VecScatterBegin(scat_i[0], coords, ccoords, INSERT_VALUES, SCATTER_FORWARD));
 47:     PetscCall(VecScatterEnd(scat_i[0], coords, ccoords, INSERT_VALUES, SCATTER_FORWARD));
 48:     PetscCall(VecScatterBegin(scat_g[0], coords, clcoords, INSERT_VALUES, SCATTER_FORWARD));
 49:     PetscCall(VecScatterEnd(scat_g[0], coords, clcoords, INSERT_VALUES, SCATTER_FORWARD));
 50:     PetscCall(DMSetCoordinates(subdm, ccoords));
 51:     PetscCall(DMSetCoordinatesLocal(subdm, clcoords));
 52:     PetscCall(VecScatterDestroy(&scat_i[0]));
 53:     PetscCall(VecScatterDestroy(&scat_g[0]));
 54:     PetscCall(VecDestroy(&ccoords));
 55:     PetscCall(VecDestroy(&clcoords));
 56:     PetscCall(PetscFree(scat_i));
 57:     PetscCall(PetscFree(scat_g));
 58:   }
 59:   PetscFunctionReturn(PETSC_SUCCESS);
 60: }

 62: /*@
 63:   DMGetCoordinateDM - Gets the `DM` that prescribes coordinate layout and scatters between global and local coordinates

 65:   Collective

 67:   Input Parameter:
 68: . dm - the `DM`

 70:   Output Parameter:
 71: . cdm - coordinate `DM`

 73:   Level: intermediate

 75: .seealso: `DM`, `DMSetCoordinateDM()`, `DMSetCoordinates()`, `DMSetCoordinatesLocal()`, `DMGetCoordinates()`, `DMGetCoordinatesLocal()`, `DMGSetCellCoordinateDM()`,

 77: @*/
 78: PetscErrorCode DMGetCoordinateDM(DM dm, DM *cdm)
 79: {
 80:   PetscFunctionBegin;
 82:   PetscAssertPointer(cdm, 2);
 83:   if (!dm->coordinates[0].dm) {
 84:     DM cdm;

 86:     PetscUseTypeMethod(dm, createcoordinatedm, &cdm);
 87:     PetscCall(PetscObjectSetName((PetscObject)cdm, "coordinateDM"));
 88:     /* Just in case the DM sets the coordinate DM when creating it (DMP4est can do this, because it may not setup
 89:      * until the call to CreateCoordinateDM) */
 90:     PetscCall(DMDestroy(&dm->coordinates[0].dm));
 91:     dm->coordinates[0].dm = cdm;
 92:   }
 93:   *cdm = dm->coordinates[0].dm;
 94:   PetscFunctionReturn(PETSC_SUCCESS);
 95: }

 97: /*@
 98:   DMSetCoordinateDM - Sets the `DM` that prescribes coordinate layout and scatters between global and local coordinates

100:   Logically Collective

102:   Input Parameters:
103: + dm  - the `DM`
104: - cdm - coordinate `DM`

106:   Level: intermediate

108: .seealso: `DM`, `DMGetCoordinateDM()`, `DMSetCoordinates()`, `DMGetCellCoordinateDM()`, `DMSetCoordinatesLocal()`, `DMGetCoordinates()`, `DMGetCoordinatesLocal()`,
109:           `DMGSetCellCoordinateDM()`
110: @*/
111: PetscErrorCode DMSetCoordinateDM(DM dm, DM cdm)
112: {
113:   PetscFunctionBegin;
116:   PetscCall(PetscObjectReference((PetscObject)cdm));
117:   PetscCall(DMDestroy(&dm->coordinates[0].dm));
118:   dm->coordinates[0].dm = cdm;
119:   PetscFunctionReturn(PETSC_SUCCESS);
120: }

122: /*@
123:   DMGetCellCoordinateDM - Gets the `DM` that prescribes cellwise coordinate layout and scatters between global and local cellwise coordinates

125:   Collective

127:   Input Parameter:
128: . dm - the `DM`

130:   Output Parameter:
131: . cdm - cellwise coordinate `DM`, or `NULL` if they are not defined

133:   Level: intermediate

135:   Note:
136:   Call `DMLocalizeCoordinates()` to automatically create cellwise coordinates for periodic geometries.

138: .seealso: `DM`, `DMSetCellCoordinateDM()`, `DMSetCellCoordinates()`, `DMSetCellCoordinatesLocal()`, `DMGetCellCoordinates()`, `DMGetCellCoordinatesLocal()`,
139:           `DMLocalizeCoordinates()`, `DMSetCoordinateDM()`, `DMGetCoordinateDM()`
140: @*/
141: PetscErrorCode DMGetCellCoordinateDM(DM dm, DM *cdm)
142: {
143:   PetscFunctionBegin;
145:   PetscAssertPointer(cdm, 2);
146:   *cdm = dm->coordinates[1].dm;
147:   PetscFunctionReturn(PETSC_SUCCESS);
148: }

150: /*@
151:   DMSetCellCoordinateDM - Sets the `DM` that prescribes cellwise coordinate layout and scatters between global and local cellwise coordinates

153:   Logically Collective

155:   Input Parameters:
156: + dm  - the `DM`
157: - cdm - cellwise coordinate `DM`

159:   Level: intermediate

161:   Note:
162:   As opposed to `DMSetCoordinateDM()` these coordinates are useful for discontinuous Galerkin methods since they support coordinate fields that are discontinuous at cell boundaries.

164: .seealso: `DMGetCellCoordinateDM()`, `DMSetCellCoordinates()`, `DMSetCellCoordinatesLocal()`, `DMGetCellCoordinates()`, `DMGetCellCoordinatesLocal()`,
165:           `DMSetCoordinateDM()`, `DMGetCoordinateDM()`
166: @*/
167: PetscErrorCode DMSetCellCoordinateDM(DM dm, DM cdm)
168: {
169:   PetscInt dim;

171:   PetscFunctionBegin;
173:   if (cdm) {
175:     PetscCall(DMGetCoordinateDim(dm, &dim));
176:     dm->coordinates[1].dim = dim;
177:   }
178:   PetscCall(PetscObjectReference((PetscObject)cdm));
179:   PetscCall(DMDestroy(&dm->coordinates[1].dm));
180:   dm->coordinates[1].dm = cdm;
181:   PetscFunctionReturn(PETSC_SUCCESS);
182: }

184: /*@
185:   DMGetCoordinateDim - Retrieve the dimension of the embedding space for coordinate values. For example a mesh on the surface of a sphere would have a 3 dimensional embedding space

187:   Not Collective

189:   Input Parameter:
190: . dm - The `DM` object

192:   Output Parameter:
193: . dim - The embedding dimension

195:   Level: intermediate

197: .seealso: `DM`, `DMSetCoordinateDim()`, `DMGetCoordinateSection()`, `DMGetCoordinateDM()`, `DMGetLocalSection()`, `DMSetLocalSection()`
198: @*/
199: PetscErrorCode DMGetCoordinateDim(DM dm, PetscInt *dim)
200: {
201:   PetscFunctionBegin;
203:   PetscAssertPointer(dim, 2);
204:   if (dm->coordinates[0].dim == PETSC_DEFAULT) dm->coordinates[0].dim = dm->dim;
205:   *dim = dm->coordinates[0].dim;
206:   PetscFunctionReturn(PETSC_SUCCESS);
207: }

209: /*@
210:   DMSetCoordinateDim - Set the dimension of the embedding space for coordinate values.

212:   Not Collective

214:   Input Parameters:
215: + dm  - The `DM` object
216: - dim - The embedding dimension

218:   Level: intermediate

220: .seealso: `DM`, `DMGetCoordinateDim()`, `DMSetCoordinateSection()`, `DMGetCoordinateSection()`, `DMGetLocalSection()`, `DMSetLocalSection()`
221: @*/
222: PetscErrorCode DMSetCoordinateDim(DM dm, PetscInt dim)
223: {
224:   PetscDS  ds;
225:   PetscInt Nds, n;

227:   PetscFunctionBegin;
229:   dm->coordinates[0].dim = dim;
230:   if (dm->dim >= 0) {
231:     PetscCall(DMGetNumDS(dm, &Nds));
232:     for (n = 0; n < Nds; ++n) {
233:       PetscCall(DMGetRegionNumDS(dm, n, NULL, NULL, &ds, NULL));
234:       PetscCall(PetscDSSetCoordinateDimension(ds, dim));
235:     }
236:   }
237:   PetscFunctionReturn(PETSC_SUCCESS);
238: }

240: /*@
241:   DMGetCoordinateSection - Retrieve the `PetscSection` of coordinate values over the mesh.

243:   Collective

245:   Input Parameter:
246: . dm - The `DM` object

248:   Output Parameter:
249: . section - The `PetscSection` object

251:   Level: intermediate

253:   Note:
254:   This just retrieves the local section from the coordinate `DM`. In other words,
255: .vb
256:   DMGetCoordinateDM(dm, &cdm);
257:   DMGetLocalSection(cdm, &section);
258: .ve

260: .seealso: `DM`, `DMGetCoordinateDM()`, `DMGetLocalSection()`, `DMSetLocalSection()`
261: @*/
262: PetscErrorCode DMGetCoordinateSection(DM dm, PetscSection *section)
263: {
264:   DM cdm;

266:   PetscFunctionBegin;
268:   PetscAssertPointer(section, 2);
269:   PetscCall(DMGetCoordinateDM(dm, &cdm));
270:   PetscCall(DMGetLocalSection(cdm, section));
271:   PetscFunctionReturn(PETSC_SUCCESS);
272: }

274: /*@
275:   DMSetCoordinateSection - Set the `PetscSection` of coordinate values over the mesh.

277:   Not Collective

279:   Input Parameters:
280: + dm      - The `DM` object
281: . dim     - The embedding dimension, or `PETSC_DETERMINE`
282: - section - The `PetscSection` object

284:   Level: intermediate

286: .seealso: `DM`, `DMGetCoordinateDim()`, `DMGetCoordinateSection()`, `DMGetLocalSection()`, `DMSetLocalSection()`
287: @*/
288: PetscErrorCode DMSetCoordinateSection(DM dm, PetscInt dim, PetscSection section)
289: {
290:   DM cdm;

292:   PetscFunctionBegin;
295:   PetscCall(DMGetCoordinateDM(dm, &cdm));
296:   PetscCall(DMSetLocalSection(cdm, section));
297:   if (dim == PETSC_DETERMINE) {
298:     PetscInt d = PETSC_DEFAULT;
299:     PetscInt pStart, pEnd, vStart, vEnd, v, dd;

301:     PetscCall(PetscSectionGetChart(section, &pStart, &pEnd));
302:     PetscCall(DMGetDimPoints(dm, 0, &vStart, &vEnd));
303:     pStart = PetscMax(vStart, pStart);
304:     pEnd   = PetscMin(vEnd, pEnd);
305:     for (v = pStart; v < pEnd; ++v) {
306:       PetscCall(PetscSectionGetDof(section, v, &dd));
307:       if (dd) {
308:         d = dd;
309:         break;
310:       }
311:     }
312:     if (d >= 0) PetscCall(DMSetCoordinateDim(dm, d));
313:   }
314:   PetscFunctionReturn(PETSC_SUCCESS);
315: }

317: /*@
318:   DMGetCellCoordinateSection - Retrieve the `PetscSection` of cellwise coordinate values over the mesh.

320:   Collective

322:   Input Parameter:
323: . dm - The `DM` object

325:   Output Parameter:
326: . section - The `PetscSection` object, or `NULL` if no cellwise coordinates are defined

328:   Level: intermediate

330:   Note:
331:   This just retrieves the local section from the cell coordinate `DM`. In other words,
332: .vb
333:   DMGetCellCoordinateDM(dm, &cdm);
334:   DMGetLocalSection(cdm, &section);
335: .ve

337: .seealso: `DM`, `DMGetCoordinateSection()`, `DMSetCellCoordinateSection()`, `DMGetCellCoordinateDM()`, `DMGetCoordinateDM()`, `DMGetLocalSection()`, `DMSetLocalSection()`
338: @*/
339: PetscErrorCode DMGetCellCoordinateSection(DM dm, PetscSection *section)
340: {
341:   DM cdm;

343:   PetscFunctionBegin;
345:   PetscAssertPointer(section, 2);
346:   *section = NULL;
347:   PetscCall(DMGetCellCoordinateDM(dm, &cdm));
348:   if (cdm) PetscCall(DMGetLocalSection(cdm, section));
349:   PetscFunctionReturn(PETSC_SUCCESS);
350: }

352: /*@
353:   DMSetCellCoordinateSection - Set the `PetscSection` of cellwise coordinate values over the mesh.

355:   Not Collective

357:   Input Parameters:
358: + dm      - The `DM` object
359: . dim     - The embedding dimension, or `PETSC_DETERMINE`
360: - section - The `PetscSection` object for a cellwise layout

362:   Level: intermediate

364: .seealso: `DM`, `DMGetCoordinateDim()`, `DMSetCoordinateSection()`, `DMGetCellCoordinateSection()`, `DMGetCoordinateSection()`, `DMGetCellCoordinateDM()`, `DMGetLocalSection()`, `DMSetLocalSection()`
365: @*/
366: PetscErrorCode DMSetCellCoordinateSection(DM dm, PetscInt dim, PetscSection section)
367: {
368:   DM cdm;

370:   PetscFunctionBegin;
373:   PetscCall(DMGetCellCoordinateDM(dm, &cdm));
374:   PetscCheck(cdm, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "No DM defined for cellwise coordinates");
375:   PetscCall(DMSetLocalSection(cdm, section));
376:   if (dim == PETSC_DETERMINE) {
377:     PetscInt d = PETSC_DEFAULT;
378:     PetscInt pStart, pEnd, vStart, vEnd, v, dd;

380:     PetscCall(PetscSectionGetChart(section, &pStart, &pEnd));
381:     PetscCall(DMGetDimPoints(dm, 0, &vStart, &vEnd));
382:     pStart = PetscMax(vStart, pStart);
383:     pEnd   = PetscMin(vEnd, pEnd);
384:     for (v = pStart; v < pEnd; ++v) {
385:       PetscCall(PetscSectionGetDof(section, v, &dd));
386:       if (dd) {
387:         d = dd;
388:         break;
389:       }
390:     }
391:     if (d >= 0) PetscCall(DMSetCoordinateDim(dm, d));
392:   }
393:   PetscFunctionReturn(PETSC_SUCCESS);
394: }

396: /*@
397:   DMGetCoordinates - Gets a global vector with the coordinates associated with the `DM`.

399:   Collective if the global vector with coordinates has not been set yet but the local vector with coordinates has been set

401:   Input Parameter:
402: . dm - the `DM`

404:   Output Parameter:
405: . c - global coordinate vector

407:   Level: intermediate

409:   Notes:
410:   This is a borrowed reference, so the user should NOT destroy this vector. When the `DM` is
411:   destroyed `c` will no longer be valid.

413:   Each process has only the locally-owned portion of the global coordinates (does NOT have the ghost coordinates), see `DMGetCoordinatesLocal()`.

415:   For `DMDA`, in two and three dimensions coordinates are interlaced (x_0,y_0,x_1,y_1,...)
416:   and (x_0,y_0,z_0,x_1,y_1,z_1...)

418:   Does not work for `DMSTAG`

420: .seealso: `DM`, `DMDA`, `DMSetCoordinates()`, `DMGetCoordinatesLocal()`, `DMGetCoordinateDM()`, `DMDASetUniformCoordinates()`
421: @*/
422: PetscErrorCode DMGetCoordinates(DM dm, Vec *c)
423: {
424:   PetscFunctionBegin;
426:   PetscAssertPointer(c, 2);
427:   if (!dm->coordinates[0].x && dm->coordinates[0].xl) {
428:     DM cdm = NULL;

430:     PetscCall(DMGetCoordinateDM(dm, &cdm));
431:     PetscCall(DMCreateGlobalVector(cdm, &dm->coordinates[0].x));
432:     PetscCall(PetscObjectSetName((PetscObject)dm->coordinates[0].x, "coordinates"));
433:     PetscCall(DMLocalToGlobalBegin(cdm, dm->coordinates[0].xl, INSERT_VALUES, dm->coordinates[0].x));
434:     PetscCall(DMLocalToGlobalEnd(cdm, dm->coordinates[0].xl, INSERT_VALUES, dm->coordinates[0].x));
435:   }
436:   *c = dm->coordinates[0].x;
437:   PetscFunctionReturn(PETSC_SUCCESS);
438: }

440: /*@
441:   DMSetCoordinates - Sets into the `DM` a global vector that holds the coordinates

443:   Logically Collective

445:   Input Parameters:
446: + dm - the `DM`
447: - c  - coordinate vector

449:   Level: intermediate

451:   Notes:
452:   The coordinates do not include those for ghost points, which are in the local vector.

454:   The vector `c` can be destroyed after the call

456: .seealso: `DM`, `DMSetCoordinatesLocal()`, `DMGetCoordinates()`, `DMGetCoordinatesLocal()`, `DMGetCoordinateDM()`, `DMDASetUniformCoordinates()`
457: @*/
458: PetscErrorCode DMSetCoordinates(DM dm, Vec c)
459: {
460:   PetscFunctionBegin;
463:   PetscCall(PetscObjectReference((PetscObject)c));
464:   PetscCall(VecDestroy(&dm->coordinates[0].x));
465:   dm->coordinates[0].x = c;
466:   PetscCall(VecDestroy(&dm->coordinates[0].xl));
467:   PetscCall(DMCoarsenHookAdd(dm, DMRestrictHook_Coordinates, NULL, NULL));
468:   PetscCall(DMSubDomainHookAdd(dm, DMSubDomainHook_Coordinates, NULL, NULL));
469:   PetscFunctionReturn(PETSC_SUCCESS);
470: }

472: /*@
473:   DMGetCellCoordinates - Gets a global vector with the cellwise coordinates associated with the `DM`.

475:   Collective

477:   Input Parameter:
478: . dm - the `DM`

480:   Output Parameter:
481: . c - global coordinate vector

483:   Level: intermediate

485:   Notes:
486:   This is a borrowed reference, so the user should NOT destroy this vector. When the `DM` is
487:   destroyed `c` will no longer be valid.

489:   Each process has only the locally-owned portion of the global coordinates (does NOT have the ghost coordinates).

491: .seealso: `DM`, `DMGetCoordinates()`, `DMSetCellCoordinates()`, `DMGetCellCoordinatesLocal()`, `DMGetCellCoordinateDM()`
492: @*/
493: PetscErrorCode DMGetCellCoordinates(DM dm, Vec *c)
494: {
495:   PetscFunctionBegin;
497:   PetscAssertPointer(c, 2);
498:   if (!dm->coordinates[1].x && dm->coordinates[1].xl) {
499:     DM cdm = NULL;

501:     PetscCall(DMGetCellCoordinateDM(dm, &cdm));
502:     PetscCall(DMCreateGlobalVector(cdm, &dm->coordinates[1].x));
503:     PetscCall(PetscObjectSetName((PetscObject)dm->coordinates[1].x, "DG coordinates"));
504:     PetscCall(DMLocalToGlobalBegin(cdm, dm->coordinates[1].xl, INSERT_VALUES, dm->coordinates[1].x));
505:     PetscCall(DMLocalToGlobalEnd(cdm, dm->coordinates[1].xl, INSERT_VALUES, dm->coordinates[1].x));
506:   }
507:   *c = dm->coordinates[1].x;
508:   PetscFunctionReturn(PETSC_SUCCESS);
509: }

511: /*@
512:   DMSetCellCoordinates - Sets into the `DM` a global vector that holds the cellwise coordinates

514:   Collective

516:   Input Parameters:
517: + dm - the `DM`
518: - c  - cellwise coordinate vector

520:   Level: intermediate

522:   Notes:
523:   The coordinates do not include those for ghost points, which are in the local vector.

525:   The vector `c` should be destroyed by the caller.

527: .seealso: `DM`, `DMGetCoordinates()`, `DMSetCellCoordinatesLocal()`, `DMGetCellCoordinates()`, `DMGetCellCoordinatesLocal()`, `DMGetCellCoordinateDM()`
528: @*/
529: PetscErrorCode DMSetCellCoordinates(DM dm, Vec c)
530: {
531:   PetscFunctionBegin;
534:   PetscCall(PetscObjectReference((PetscObject)c));
535:   PetscCall(VecDestroy(&dm->coordinates[1].x));
536:   dm->coordinates[1].x = c;
537:   PetscCall(VecDestroy(&dm->coordinates[1].xl));
538:   PetscFunctionReturn(PETSC_SUCCESS);
539: }

541: /*@
542:   DMGetCoordinatesLocalSetUp - Prepares a local vector of coordinates, so that `DMGetCoordinatesLocalNoncollective()` can be used as non-collective afterwards.

544:   Collective

546:   Input Parameter:
547: . dm - the `DM`

549:   Level: advanced

551: .seealso: `DM`, `DMSetCoordinates()`, `DMGetCoordinatesLocalNoncollective()`
552: @*/
553: PetscErrorCode DMGetCoordinatesLocalSetUp(DM dm)
554: {
555:   PetscFunctionBegin;
557:   if (!dm->coordinates[0].xl && dm->coordinates[0].x) {
558:     DM       cdm = NULL;
559:     PetscInt bs;

561:     PetscCall(DMGetCoordinateDM(dm, &cdm));
562:     PetscCall(DMCreateLocalVector(cdm, &dm->coordinates[0].xl));
563:     PetscCall(PetscObjectSetName((PetscObject)dm->coordinates[0].xl, "Local Coordinates"));
564:     // If the size of the vector is 0, it will not get the right block size
565:     PetscCall(VecGetBlockSize(dm->coordinates[0].x, &bs));
566:     PetscCall(VecSetBlockSize(dm->coordinates[0].xl, bs));
567:     PetscCall(PetscObjectSetName((PetscObject)dm->coordinates[0].xl, "coordinates"));
568:     PetscCall(DMGlobalToLocalBegin(cdm, dm->coordinates[0].x, INSERT_VALUES, dm->coordinates[0].xl));
569:     PetscCall(DMGlobalToLocalEnd(cdm, dm->coordinates[0].x, INSERT_VALUES, dm->coordinates[0].xl));
570:   }
571:   PetscFunctionReturn(PETSC_SUCCESS);
572: }

574: /*@
575:   DMGetCoordinatesLocal - Gets a local vector with the coordinates associated with the `DM`.

577:   Collective the first time it is called

579:   Input Parameter:
580: . dm - the `DM`

582:   Output Parameter:
583: . c - coordinate vector

585:   Level: intermediate

587:   Notes:
588:   This is a borrowed reference, so the user should NOT destroy `c`

590:   Each process has the local and ghost coordinates

592:   For `DMDA`, in two and three dimensions coordinates are interlaced (x_0,y_0,x_1,y_1,...)
593:   and (x_0,y_0,z_0,x_1,y_1,z_1...)

595: .seealso: `DM`, `DMSetCoordinatesLocal()`, `DMGetCoordinates()`, `DMSetCoordinates()`, `DMGetCoordinateDM()`, `DMGetCoordinatesLocalNoncollective()`
596: @*/
597: PetscErrorCode DMGetCoordinatesLocal(DM dm, Vec *c)
598: {
599:   PetscFunctionBegin;
601:   PetscAssertPointer(c, 2);
602:   PetscCall(DMGetCoordinatesLocalSetUp(dm));
603:   *c = dm->coordinates[0].xl;
604:   PetscFunctionReturn(PETSC_SUCCESS);
605: }

607: /*@
608:   DMGetCoordinatesLocalNoncollective - Non-collective version of `DMGetCoordinatesLocal()`. Fails if global coordinates have been set and `DMGetCoordinatesLocalSetUp()` not called.

610:   Not Collective

612:   Input Parameter:
613: . dm - the `DM`

615:   Output Parameter:
616: . c - coordinate vector

618:   Level: advanced

620:   Note:
621:   A previous call to  `DMGetCoordinatesLocal()` or `DMGetCoordinatesLocalSetUp()` ensures that a call to this function will not error.

623: .seealso: `DM`, `DMGetCoordinatesLocalSetUp()`, `DMGetCoordinatesLocal()`, `DMSetCoordinatesLocal()`, `DMGetCoordinates()`, `DMSetCoordinates()`, `DMGetCoordinateDM()`
624: @*/
625: PetscErrorCode DMGetCoordinatesLocalNoncollective(DM dm, Vec *c)
626: {
627:   PetscFunctionBegin;
629:   PetscAssertPointer(c, 2);
630:   PetscCheck(dm->coordinates[0].xl || !dm->coordinates[0].x, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "DMGetCoordinatesLocalSetUp() has not been called");
631:   *c = dm->coordinates[0].xl;
632:   PetscFunctionReturn(PETSC_SUCCESS);
633: }

635: /*@
636:   DMGetCoordinatesLocalTuple - Gets a local vector with the coordinates of specified points and the section describing its layout.

638:   Not Collective

640:   Input Parameters:
641: + dm - the `DM`
642: - p  - the `IS` of points whose coordinates will be returned

644:   Output Parameters:
645: + pCoordSection - the `PetscSection` describing the layout of pCoord, i.e. each point corresponds to one point in `p`, and DOFs correspond to coordinates
646: - pCoord        - the `Vec` with coordinates of points in `p`

648:   Level: advanced

650:   Notes:
651:   `DMGetCoordinatesLocalSetUp()` must be called first. This function employs `DMGetCoordinatesLocalNoncollective()` so it is not collective.

653:   This creates a new vector, so the user SHOULD destroy this vector

655:   Each process has the local and ghost coordinates

657:   For `DMDA`, in two and three dimensions coordinates are interlaced (x_0,y_0,x_1,y_1,...)
658:   and (x_0,y_0,z_0,x_1,y_1,z_1...)

660: .seealso: `DM`, `DMDA`, `DMSetCoordinatesLocal()`, `DMGetCoordinatesLocal()`, `DMGetCoordinatesLocalNoncollective()`, `DMGetCoordinatesLocalSetUp()`, `DMGetCoordinates()`, `DMSetCoordinates()`, `DMGetCoordinateDM()`
661: @*/
662: PetscErrorCode DMGetCoordinatesLocalTuple(DM dm, IS p, PetscSection *pCoordSection, Vec *pCoord)
663: {
664:   DM                 cdm;
665:   PetscSection       cs, newcs;
666:   Vec                coords;
667:   const PetscScalar *arr;
668:   PetscScalar       *newarr = NULL;
669:   PetscInt           n;

671:   PetscFunctionBegin;
674:   if (pCoordSection) PetscAssertPointer(pCoordSection, 3);
675:   if (pCoord) PetscAssertPointer(pCoord, 4);
676:   PetscCall(DMGetCoordinateDM(dm, &cdm));
677:   PetscCall(DMGetLocalSection(cdm, &cs));
678:   PetscCall(DMGetCoordinatesLocal(dm, &coords));
679:   PetscCheck(coords, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "DMGetCoordinatesLocalSetUp() has not been called or coordinates not set");
680:   PetscCheck(cdm && cs, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "DM not supported");
681:   PetscCall(VecGetArrayRead(coords, &arr));
682:   PetscCall(PetscSectionExtractDofsFromArray(cs, MPIU_SCALAR, arr, p, &newcs, pCoord ? ((void **)&newarr) : NULL));
683:   PetscCall(VecRestoreArrayRead(coords, &arr));
684:   if (pCoord) {
685:     PetscCall(PetscSectionGetStorageSize(newcs, &n));
686:     /* set array in two steps to mimic PETSC_OWN_POINTER */
687:     PetscCall(VecCreateSeqWithArray(PetscObjectComm((PetscObject)p), 1, n, NULL, pCoord));
688:     PetscCall(VecReplaceArray(*pCoord, newarr));
689:   } else {
690:     PetscCall(PetscFree(newarr));
691:   }
692:   if (pCoordSection) {
693:     *pCoordSection = newcs;
694:   } else PetscCall(PetscSectionDestroy(&newcs));
695:   PetscFunctionReturn(PETSC_SUCCESS);
696: }

698: /*@
699:   DMSetCoordinatesLocal - Sets into the `DM` a local vector, including ghost points, that holds the coordinates

701:   Not Collective

703:   Input Parameters:
704: + dm - the `DM`
705: - c  - coordinate vector

707:   Level: intermediate

709:   Notes:
710:   The coordinates of ghost points can be set using `DMSetCoordinates()`
711:   followed by `DMGetCoordinatesLocal()`. This is intended to enable the
712:   setting of ghost coordinates outside of the domain.

714:   The vector `c` should be destroyed by the caller.

716: .seealso: `DM`, `DMGetCoordinatesLocal()`, `DMSetCoordinates()`, `DMGetCoordinates()`, `DMGetCoordinateDM()`
717: @*/
718: PetscErrorCode DMSetCoordinatesLocal(DM dm, Vec c)
719: {
720:   PetscFunctionBegin;
723:   PetscCall(PetscObjectReference((PetscObject)c));
724:   PetscCall(VecDestroy(&dm->coordinates[0].xl));
725:   dm->coordinates[0].xl = c;
726:   PetscCall(VecDestroy(&dm->coordinates[0].x));
727:   PetscFunctionReturn(PETSC_SUCCESS);
728: }

730: /*@
731:   DMGetCellCoordinatesLocalSetUp - Prepares a local vector of cellwise coordinates, so that `DMGetCellCoordinatesLocalNoncollective()` can be used as non-collective afterwards.

733:   Collective

735:   Input Parameter:
736: . dm - the `DM`

738:   Level: advanced

740: .seealso: `DM`, `DMGetCellCoordinatesLocalNoncollective()`
741: @*/
742: PetscErrorCode DMGetCellCoordinatesLocalSetUp(DM dm)
743: {
744:   PetscFunctionBegin;
746:   if (!dm->coordinates[1].xl && dm->coordinates[1].x) {
747:     DM cdm = NULL;

749:     PetscCall(DMGetCellCoordinateDM(dm, &cdm));
750:     PetscCall(DMCreateLocalVector(cdm, &dm->coordinates[1].xl));
751:     PetscCall(PetscObjectSetName((PetscObject)dm->coordinates[1].xl, "DG coordinates"));
752:     PetscCall(DMGlobalToLocalBegin(cdm, dm->coordinates[1].x, INSERT_VALUES, dm->coordinates[1].xl));
753:     PetscCall(DMGlobalToLocalEnd(cdm, dm->coordinates[1].x, INSERT_VALUES, dm->coordinates[1].xl));
754:   }
755:   PetscFunctionReturn(PETSC_SUCCESS);
756: }

758: /*@
759:   DMGetCellCoordinatesLocal - Gets a local vector with the cellwise coordinates associated with the `DM`.

761:   Collective

763:   Input Parameter:
764: . dm - the `DM`

766:   Output Parameter:
767: . c - coordinate vector

769:   Level: intermediate

771:   Notes:
772:   This is a borrowed reference, so the user should NOT destroy this vector

774:   Each process has the local and ghost coordinates

776: .seealso: `DM`, `DMSetCellCoordinatesLocal()`, `DMGetCellCoordinates()`, `DMSetCellCoordinates()`, `DMGetCellCoordinateDM()`, `DMGetCellCoordinatesLocalNoncollective()`
777: @*/
778: PetscErrorCode DMGetCellCoordinatesLocal(DM dm, Vec *c)
779: {
780:   PetscFunctionBegin;
782:   PetscAssertPointer(c, 2);
783:   PetscCall(DMGetCellCoordinatesLocalSetUp(dm));
784:   *c = dm->coordinates[1].xl;
785:   PetscFunctionReturn(PETSC_SUCCESS);
786: }

788: /*@
789:   DMGetCellCoordinatesLocalNoncollective - Non-collective version of `DMGetCellCoordinatesLocal()`. Fails if global cellwise coordinates have been set and `DMGetCellCoordinatesLocalSetUp()` not called.

791:   Not Collective

793:   Input Parameter:
794: . dm - the `DM`

796:   Output Parameter:
797: . c - cellwise coordinate vector

799:   Level: advanced

801: .seealso: `DM`, `DMGetCellCoordinatesLocalSetUp()`, `DMGetCellCoordinatesLocal()`, `DMSetCellCoordinatesLocal()`, `DMGetCellCoordinates()`, `DMSetCellCoordinates()`, `DMGetCellCoordinateDM()`
802: @*/
803: PetscErrorCode DMGetCellCoordinatesLocalNoncollective(DM dm, Vec *c)
804: {
805:   PetscFunctionBegin;
807:   PetscAssertPointer(c, 2);
808:   PetscCheck(dm->coordinates[1].xl || !dm->coordinates[1].x, PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONGSTATE, "DMGetCellCoordinatesLocalSetUp() has not been called");
809:   *c = dm->coordinates[1].xl;
810:   PetscFunctionReturn(PETSC_SUCCESS);
811: }

813: /*@
814:   DMSetCellCoordinatesLocal - Sets into the `DM` a local vector including ghost points that holds the cellwise coordinates

816:   Not Collective

818:   Input Parameters:
819: + dm - the `DM`
820: - c  - cellwise coordinate vector

822:   Level: intermediate

824:   Notes:
825:   The coordinates of ghost points can be set using `DMSetCoordinates()`
826:   followed by `DMGetCoordinatesLocal()`. This is intended to enable the
827:   setting of ghost coordinates outside of the domain.

829:   The vector `c` should be destroyed by the caller.

831: .seealso: `DM`, `DMGetCellCoordinatesLocal()`, `DMSetCellCoordinates()`, `DMGetCellCoordinates()`, `DMGetCellCoordinateDM()`
832: @*/
833: PetscErrorCode DMSetCellCoordinatesLocal(DM dm, Vec c)
834: {
835:   PetscFunctionBegin;
838:   PetscCall(PetscObjectReference((PetscObject)c));
839:   PetscCall(VecDestroy(&dm->coordinates[1].xl));
840:   dm->coordinates[1].xl = c;
841:   PetscCall(VecDestroy(&dm->coordinates[1].x));
842:   PetscFunctionReturn(PETSC_SUCCESS);
843: }

845: PetscErrorCode DMGetCoordinateField(DM dm, DMField *field)
846: {
847:   PetscFunctionBegin;
849:   PetscAssertPointer(field, 2);
850:   if (!dm->coordinates[0].field) PetscTryTypeMethod(dm, createcoordinatefield, &dm->coordinates[0].field);
851:   *field = dm->coordinates[0].field;
852:   PetscFunctionReturn(PETSC_SUCCESS);
853: }

855: PetscErrorCode DMSetCoordinateField(DM dm, DMField field)
856: {
857:   PetscFunctionBegin;
860:   PetscCall(PetscObjectReference((PetscObject)field));
861:   PetscCall(DMFieldDestroy(&dm->coordinates[0].field));
862:   dm->coordinates[0].field = field;
863:   PetscFunctionReturn(PETSC_SUCCESS);
864: }

866: PetscErrorCode DMGetLocalBoundingBox_Coordinates(DM dm, PetscReal lmin[], PetscReal lmax[], PetscInt cs[], PetscInt ce[])
867: {
868:   Vec         coords = NULL;
869:   PetscReal   min[3] = {PETSC_MAX_REAL, PETSC_MAX_REAL, PETSC_MAX_REAL};
870:   PetscReal   max[3] = {PETSC_MIN_REAL, PETSC_MIN_REAL, PETSC_MIN_REAL};
871:   PetscInt    cdim, i, j;
872:   PetscMPIInt size;

874:   PetscFunctionBegin;
875:   PetscCallMPI(MPI_Comm_size(PetscObjectComm((PetscObject)dm), &size));
876:   PetscCall(DMGetCoordinateDim(dm, &cdim));
877:   if (size == 1) {
878:     const PetscReal *L, *Lstart;

880:     PetscCall(DMGetPeriodicity(dm, NULL, &Lstart, &L));
881:     if (L) {
882:       for (PetscInt d = 0; d < cdim; ++d)
883:         if (L[d] > 0.0) {
884:           min[d] = Lstart[d];
885:           max[d] = Lstart[d] + L[d];
886:         }
887:     }
888:   }
889:   PetscCall(DMGetCoordinatesLocal(dm, &coords));
890:   if (coords) {
891:     const PetscScalar *local_coords;
892:     PetscInt           N, Ni;

894:     for (j = cdim; j < 3; ++j) {
895:       min[j] = 0;
896:       max[j] = 0;
897:     }
898:     PetscCall(VecGetArrayRead(coords, &local_coords));
899:     PetscCall(VecGetLocalSize(coords, &N));
900:     Ni = N / cdim;
901:     for (i = 0; i < Ni; ++i) {
902:       for (j = 0; j < cdim; ++j) {
903:         min[j] = PetscMin(min[j], PetscRealPart(local_coords[i * cdim + j]));
904:         max[j] = PetscMax(max[j], PetscRealPart(local_coords[i * cdim + j]));
905:       }
906:     }
907:     PetscCall(VecRestoreArrayRead(coords, &local_coords));
908:     PetscCall(DMGetCellCoordinatesLocal(dm, &coords));
909:     if (coords) {
910:       PetscCall(VecGetArrayRead(coords, &local_coords));
911:       PetscCall(VecGetLocalSize(coords, &N));
912:       Ni = N / cdim;
913:       for (i = 0; i < Ni; ++i) {
914:         for (j = 0; j < cdim; ++j) {
915:           min[j] = PetscMin(min[j], PetscRealPart(local_coords[i * cdim + j]));
916:           max[j] = PetscMax(max[j], PetscRealPart(local_coords[i * cdim + j]));
917:         }
918:       }
919:       PetscCall(VecRestoreArrayRead(coords, &local_coords));
920:     }
921:     if (lmin) PetscCall(PetscArraycpy(lmin, min, cdim));
922:     if (lmax) PetscCall(PetscArraycpy(lmax, max, cdim));
923:   }
924:   PetscFunctionReturn(PETSC_SUCCESS);
925: }

927: /*@
928:   DMGetLocalBoundingBox - Returns the bounding box for the piece of the `DM` on this process.

930:   Not Collective

932:   Input Parameter:
933: . dm - the `DM`

935:   Output Parameters:
936: + lmin - local minimum coordinates (length coord dim, optional)
937: - lmax - local maximum coordinates (length coord dim, optional)

939:   Level: beginner

941:   Note:
942:   If the `DM` is a `DMDA` and has no coordinates, the index bounds are returned instead.

944: .seealso: `DM`, `DMGetCoordinates()`, `DMGetCoordinatesLocal()`, `DMGetBoundingBox()`
945: @*/
946: PetscErrorCode DMGetLocalBoundingBox(DM dm, PetscReal lmin[], PetscReal lmax[])
947: {
948:   PetscFunctionBegin;
950:   PetscUseTypeMethod(dm, getlocalboundingbox, lmin, lmax, NULL, NULL);
951:   PetscFunctionReturn(PETSC_SUCCESS);
952: }

954: /*@
955:   DMGetBoundingBox - Returns the global bounding box for the `DM`.

957:   Collective

959:   Input Parameter:
960: . dm - the `DM`

962:   Output Parameters:
963: + gmin - global minimum coordinates (length coord dim, optional)
964: - gmax - global maximum coordinates (length coord dim, optional)

966:   Level: beginner

968: .seealso: `DM`, `DMGetLocalBoundingBox()`, `DMGetCoordinates()`, `DMGetCoordinatesLocal()`
969: @*/
970: PetscErrorCode DMGetBoundingBox(DM dm, PetscReal gmin[], PetscReal gmax[])
971: {
972:   PetscReal        lmin[3], lmax[3];
973:   const PetscReal *L, *Lstart;
974:   PetscInt         cdim;

976:   PetscFunctionBegin;
978:   PetscCall(DMGetCoordinateDim(dm, &cdim));
979:   PetscCall(DMGetLocalBoundingBox(dm, lmin, lmax));
980:   if (gmin) PetscCallMPI(MPIU_Allreduce(lmin, gmin, cdim, MPIU_REAL, MPIU_MIN, PetscObjectComm((PetscObject)dm)));
981:   if (gmax) PetscCallMPI(MPIU_Allreduce(lmax, gmax, cdim, MPIU_REAL, MPIU_MAX, PetscObjectComm((PetscObject)dm)));
982:   PetscCall(DMGetPeriodicity(dm, NULL, &Lstart, &L));
983:   if (L) {
984:     for (PetscInt d = 0; d < cdim; ++d)
985:       if (L[d] > 0.0) {
986:         gmin[d] = Lstart[d];
987:         gmax[d] = Lstart[d] + L[d];
988:       }
989:   }
990:   PetscFunctionReturn(PETSC_SUCCESS);
991: }

993: static PetscErrorCode DMCreateAffineCoordinates_Internal(DM dm)
994: {
995:   DM             cdm;
996:   PetscFE        feLinear;
997:   DMPolytopeType ct;
998:   PetscInt       dim, dE, height, cStart, cEnd, gct;

1000:   PetscFunctionBegin;
1001:   PetscCall(DMGetCoordinateDM(dm, &cdm));
1002:   PetscCall(DMGetDimension(dm, &dim));
1003:   PetscCall(DMGetCoordinateDim(dm, &dE));
1004:   PetscCall(DMPlexGetVTKCellHeight(dm, &height));
1005:   PetscCall(DMPlexGetHeightStratum(dm, height, &cStart, &cEnd));
1006:   if (cEnd > cStart) PetscCall(DMPlexGetCellType(dm, cStart, &ct));
1007:   else ct = DM_POLYTOPE_UNKNOWN;
1008:   gct = (PetscInt)ct;
1009:   PetscCallMPI(MPIU_Allreduce(MPI_IN_PLACE, &gct, 1, MPIU_INT, MPI_MIN, PetscObjectComm((PetscObject)dm)));
1010:   ct = (DMPolytopeType)gct;
1011:   // Work around current bug in PetscDualSpaceSetUp_Lagrange()
1012:   //   Can be seen in plex_tutorials-ex10_1
1013:   if (ct != DM_POLYTOPE_SEG_PRISM_TENSOR && ct != DM_POLYTOPE_TRI_PRISM_TENSOR && ct != DM_POLYTOPE_QUAD_PRISM_TENSOR) {
1014:     PetscCall(PetscFECreateLagrangeByCell(PETSC_COMM_SELF, dim, dE, ct, 1, -1, &feLinear));
1015:     PetscCall(DMSetField(cdm, 0, NULL, (PetscObject)feLinear));
1016:     PetscCall(PetscFEDestroy(&feLinear));
1017:     PetscCall(DMCreateDS(cdm));
1018:   }
1019:   PetscFunctionReturn(PETSC_SUCCESS);
1020: }

1022: PetscErrorCode DMGetCoordinateDegree_Internal(DM dm, PetscInt *degree)
1023: {
1024:   DM           cdm;
1025:   PetscFE      fe;
1026:   PetscSpace   sp;
1027:   PetscClassId id;

1029:   PetscFunctionBegin;
1030:   *degree = 1;
1031:   PetscCall(DMGetCoordinateDM(dm, &cdm));
1032:   PetscCall(DMGetField(cdm, 0, NULL, (PetscObject *)&fe));
1033:   PetscCall(PetscObjectGetClassId((PetscObject)fe, &id));
1034:   if (id != PETSCFE_CLASSID) PetscFunctionReturn(PETSC_SUCCESS);
1035:   PetscCall(PetscFEGetBasisSpace(fe, &sp));
1036:   PetscCall(PetscSpaceGetDegree(sp, degree, NULL));
1037:   PetscFunctionReturn(PETSC_SUCCESS);
1038: }

1040: static void evaluate_coordinates(PetscInt dim, PetscInt Nf, PetscInt NfAux, const PetscInt uOff[], const PetscInt uOff_x[], const PetscScalar u[], const PetscScalar u_t[], const PetscScalar u_x[], const PetscInt aOff[], const PetscInt aOff_x[], const PetscScalar a[], const PetscScalar a_t[], const PetscScalar a_x[], PetscReal t, const PetscReal x[], PetscInt numConstants, const PetscScalar constants[], PetscScalar xnew[])
1041: {
1042:   for (PetscInt i = 0; i < dim; i++) xnew[i] = x[i];
1043: }

1045: /*@
1046:   DMSetCoordinateDisc - Set a coordinate space

1048:   Input Parameters:
1049: + dm      - The `DM` object
1050: . disc    - The new coordinate discretization or `NULL` to ensure a coordinate discretization exists
1051: - project - Project coordinates to new discretization

1053:   Level: intermediate

1055:   Notes:
1056:   A `PetscFE` defines an approximation space using a `PetscSpace`, which represents the basis functions, and a `PetscDualSpace`, which defines the interpolation operation in the space.

1058:   This function takes the current mesh coordinates, which are discretized using some `PetscFE` space, and projects this function into a new `PetscFE` space.
1059:   The coordinate projection is done on the continuous coordinates, but the discontinuous coordinates are not updated.

1061:   Developer Note:
1062:   With more effort, we could directly project the discontinuous coordinates also.

1064: .seealso: `DM`, `PetscFE`, `DMGetCoordinateField()`
1065: @*/
1066: PetscErrorCode DMSetCoordinateDisc(DM dm, PetscFE disc, PetscBool project)
1067: {
1068:   DM           cdmOld, cdmNew;
1069:   PetscFE      discOld;
1070:   PetscClassId classid;
1071:   PetscBool    same_space = PETSC_TRUE;
1072:   const char  *prefix;

1074:   PetscFunctionBegin;

1078:   PetscCall(DMGetCoordinateDM(dm, &cdmOld));
1079:   /* Check current discretization is compatible */
1080:   PetscCall(DMGetField(cdmOld, 0, NULL, (PetscObject *)&discOld));
1081:   PetscCall(PetscObjectGetClassId((PetscObject)discOld, &classid));
1082:   if (classid != PETSCFE_CLASSID) {
1083:     if (classid == PETSC_CONTAINER_CLASSID) {
1084:       PetscCall(DMCreateAffineCoordinates_Internal(dm));
1085:       PetscCall(DMGetField(cdmOld, 0, NULL, (PetscObject *)&discOld));
1086:     } else {
1087:       const char *discname;

1089:       PetscCall(PetscObjectGetType((PetscObject)discOld, &discname));
1090:       SETERRQ(PetscObjectComm((PetscObject)discOld), PETSC_ERR_SUP, "Discretization type %s not supported", discname);
1091:     }
1092:   }
1093:   // Linear space has been created by now
1094:   if (!disc) PetscFunctionReturn(PETSC_SUCCESS);
1095:   // Check if the new space is the same as the old modulo quadrature
1096:   {
1097:     PetscDualSpace dsOld, ds;
1098:     PetscCall(PetscFEGetDualSpace(discOld, &dsOld));
1099:     PetscCall(PetscFEGetDualSpace(disc, &ds));
1100:     PetscCall(PetscDualSpaceEqual(dsOld, ds, &same_space));
1101:   }
1102:   // Make a fresh clone of the coordinate DM
1103:   PetscCall(DMClone(cdmOld, &cdmNew));
1104:   cdmNew->cloneOpts = PETSC_TRUE;
1105:   PetscCall(PetscObjectGetOptionsPrefix((PetscObject)cdmOld, &prefix));
1106:   PetscCall(PetscObjectSetOptionsPrefix((PetscObject)cdmNew, prefix));
1107:   PetscCall(DMSetField(cdmNew, 0, NULL, (PetscObject)disc));
1108:   PetscCall(DMCreateDS(cdmNew));
1109:   {
1110:     PetscDS ds, nds;

1112:     PetscCall(DMGetDS(cdmOld, &ds));
1113:     PetscCall(DMGetDS(cdmNew, &nds));
1114:     PetscCall(PetscDSCopyConstants(ds, nds));
1115:   }
1116:   if (cdmOld->periodic.setup) {
1117:     PetscSF dummy;
1118:     // Force IsoperiodicPointSF to be built, required for periodic coordinate setup
1119:     PetscCall(DMGetIsoperiodicPointSF_Internal(dm, &dummy));
1120:     cdmNew->periodic.setup = cdmOld->periodic.setup;
1121:     PetscCall(cdmNew->periodic.setup(cdmNew));
1122:   }
1123:   if (dm->setfromoptionscalled) PetscCall(DMSetFromOptions(cdmNew));
1124:   if (project) {
1125:     Vec      coordsOld, coordsNew;
1126:     PetscInt num_face_sfs = 0;

1128:     PetscCall(DMPlexGetIsoperiodicFaceSF(dm, &num_face_sfs, NULL));
1129:     if (num_face_sfs) { // Isoperiodicity requires projecting the local coordinates
1130:       PetscCall(DMGetCoordinatesLocal(dm, &coordsOld));
1131:       PetscCall(DMCreateLocalVector(cdmNew, &coordsNew));
1132:       PetscCall(PetscObjectSetName((PetscObject)coordsNew, "coordinates"));
1133:       if (same_space) {
1134:         // Need to copy so that the new vector has the right dm
1135:         PetscCall(VecCopy(coordsOld, coordsNew));
1136:       } else {
1137:         void (*funcs[])(PetscInt, PetscInt, PetscInt, const PetscInt[], const PetscInt[], const PetscScalar[], const PetscScalar[], const PetscScalar[], const PetscInt[], const PetscInt[], const PetscScalar[], const PetscScalar[], const PetscScalar[], PetscReal, const PetscReal[], PetscInt, const PetscScalar[], PetscScalar[]) = {evaluate_coordinates};

1139:         // We can't call DMProjectField directly because it depends on KSP for DMGlobalToLocalSolve(), but we can use the core strategy
1140:         PetscCall(DMSetCoordinateDM(cdmNew, cdmOld));
1141:         // See DMPlexRemapGeometry() for a similar pattern handling the coordinate field
1142:         DMField cf;
1143:         PetscCall(DMGetCoordinateField(dm, &cf));
1144:         cdmNew->coordinates[0].field = cf;
1145:         PetscCall(DMProjectFieldLocal(cdmNew, 0.0, NULL, funcs, INSERT_VALUES, coordsNew));
1146:         cdmNew->coordinates[0].field = NULL;
1147:         PetscCall(DMSetCoordinateDM(cdmNew, NULL));
1148:       }
1149:       PetscCall(DMSetCoordinatesLocal(dm, coordsNew));
1150:       PetscCall(VecDestroy(&coordsNew));
1151:     } else {
1152:       PetscCall(DMGetCoordinates(dm, &coordsOld));
1153:       PetscCall(DMCreateGlobalVector(cdmNew, &coordsNew));
1154:       if (same_space) {
1155:         // Need to copy so that the new vector has the right dm
1156:         PetscCall(VecCopy(coordsOld, coordsNew));
1157:       } else {
1158:         Mat In;

1160:         PetscCall(DMCreateInterpolation(cdmOld, cdmNew, &In, NULL));
1161:         PetscCall(MatMult(In, coordsOld, coordsNew));
1162:         PetscCall(MatDestroy(&In));
1163:       }
1164:       PetscCall(DMSetCoordinates(dm, coordsNew));
1165:       PetscCall(VecDestroy(&coordsNew));
1166:     }
1167:   }
1168:   /* Set new coordinate structures */
1169:   PetscCall(DMSetCoordinateField(dm, NULL));
1170:   PetscCall(DMSetCoordinateDM(dm, cdmNew));
1171:   PetscCall(DMDestroy(&cdmNew));
1172:   PetscFunctionReturn(PETSC_SUCCESS);
1173: }

1175: /*@
1176:   DMLocatePoints - Locate the points in `v` in the mesh and return a `PetscSF` of the containing cells

1178:   Collective

1180:   Input Parameters:
1181: + dm    - The `DM`
1182: - ltype - The type of point location, e.g. `DM_POINTLOCATION_NONE` or `DM_POINTLOCATION_NEAREST`

1184:   Input/Output Parameters:
1185: + v      - The `Vec` of points, on output contains the nearest mesh points to the given points if `DM_POINTLOCATION_NEAREST` is used
1186: - cellSF - Points to either `NULL`, or a `PetscSF` with guesses for which cells contain each point;
1187:            on output, the `PetscSF` containing the MPI ranks and local indices of the containing points

1189:   Level: developer

1191:   Notes:
1192:   To do a search of the local cells of the mesh, `v` should have `PETSC_COMM_SELF` as its communicator.
1193:   To do a search of all the cells in the distributed mesh, `v` should have the same MPI communicator as `dm`.

1195:   Points will only be located in owned cells, not overlap cells arising from `DMPlexDistribute()` or other overlapping distributions.

1197:   If *cellSF is `NULL` on input, a `PetscSF` will be created.
1198:   If *cellSF is not `NULL` on input, it should point to an existing `PetscSF`, whose graph will be used as initial guesses.

1200:   An array that maps each point to its containing cell can be obtained with
1201: .vb
1202:     const PetscSFNode *cells;
1203:     PetscInt           nFound;
1204:     const PetscInt    *found;

1206:     PetscSFGetGraph(cellSF,NULL,&nFound,&found,&cells);
1207: .ve

1209:   Where cells[i].rank is the MPI rank of the process owning the cell containing point found[i] (or i if found == NULL), and cells[i].index is
1210:   the index of the cell in its MPI process' local numbering. This rank is in the communicator for `v`, so if `v` is on `PETSC_COMM_SELF` then the rank will always be 0.

1212: .seealso: `DM`, `DMSetCoordinates()`, `DMSetCoordinatesLocal()`, `DMGetCoordinates()`, `DMGetCoordinatesLocal()`, `DMPointLocationType`
1213: @*/
1214: PetscErrorCode DMLocatePoints(DM dm, Vec v, DMPointLocationType ltype, PetscSF *cellSF)
1215: {
1216:   PetscFunctionBegin;
1219:   PetscAssertPointer(cellSF, 4);
1220:   if (*cellSF) {
1221:     PetscMPIInt result;

1224:     PetscCallMPI(MPI_Comm_compare(PetscObjectComm((PetscObject)v), PetscObjectComm((PetscObject)*cellSF), &result));
1225:     PetscCheck(result == MPI_IDENT || result == MPI_CONGRUENT, PETSC_COMM_SELF, PETSC_ERR_ARG_INCOMP, "cellSF must have a communicator congruent to v's");
1226:   } else {
1227:     PetscCall(PetscSFCreate(PetscObjectComm((PetscObject)v), cellSF));
1228:   }
1229:   PetscCall(PetscLogEventBegin(DM_LocatePoints, dm, 0, 0, 0));
1230:   PetscUseTypeMethod(dm, locatepoints, v, ltype, *cellSF);
1231:   PetscCall(PetscLogEventEnd(DM_LocatePoints, dm, 0, 0, 0));
1232:   PetscFunctionReturn(PETSC_SUCCESS);
1233: }