Actual source code: plexvtk.c
petsc-3.15.0 2021-03-30
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      1: #define PETSCDM_DLL
      2: #include <petsc/private/dmpleximpl.h>
      3: #include <../src/sys/classes/viewer/impls/vtk/vtkvimpl.h>

      5: PetscErrorCode DMPlexVTKGetCellType_Internal(DM dm, PetscInt dim, PetscInt corners, PetscInt *cellType)
      6: {
      8:   *cellType = -1;
      9:   switch (dim) {
     10:   case 0:
     11:     switch (corners) {
     12:     case 1:
     13:       *cellType = 1; /* VTK_VERTEX */
     14:       break;
     15:     default:
     16:       break;
     17:     }
     18:     break;
     19:   case 1:
     20:     switch (corners) {
     21:     case 2:
     22:       *cellType = 3; /* VTK_LINE */
     23:       break;
     24:     case 3:
     25:       *cellType = 21; /* VTK_QUADRATIC_EDGE */
     26:       break;
     27:     default:
     28:       break;
     29:     }
     30:     break;
     31:   case 2:
     32:     switch (corners) {
     33:     case 3:
     34:       *cellType = 5; /* VTK_TRIANGLE */
     35:       break;
     36:     case 4:
     37:       *cellType = 9; /* VTK_QUAD */
     38:       break;
     39:     case 6:
     40:       *cellType = 22; /* VTK_QUADRATIC_TRIANGLE */
     41:       break;
     42:     case 9:
     43:       *cellType = 23; /* VTK_QUADRATIC_QUAD */
     44:       break;
     45:     default:
     46:       break;
     47:     }
     48:     break;
     49:   case 3:
     50:     switch (corners) {
     51:     case 4:
     52:       *cellType = 10; /* VTK_TETRA */
     53:       break;
     54:     case 6:
     55:       *cellType = 13; /* VTK_WEDGE */
     56:       break;
     57:     case 8:
     58:       *cellType = 12; /* VTK_HEXAHEDRON */
     59:       break;
     60:     case 10:
     61:       *cellType = 24; /* VTK_QUADRATIC_TETRA */
     62:       break;
     63:     case 27:
     64:       *cellType = 29; /* VTK_QUADRATIC_HEXAHEDRON */
     65:       break;
     66:     default:
     67:       break;
     68:     }
     69:   }
     70:   return(0);
     71: }

     73: static PetscErrorCode DMPlexVTKWriteCells_ASCII(DM dm, FILE *fp, PetscInt *totalCells)
     74: {
     75:   MPI_Comm       comm;
     76:   DMLabel        label;
     77:   IS             globalVertexNumbers = NULL;
     78:   const PetscInt *gvertex;
     79:   PetscInt       dim;
     80:   PetscInt       numCorners = 0, totCorners = 0, maxCorners, *corners;
     81:   PetscInt       numCells   = 0, totCells   = 0, maxCells, cellHeight;
     82:   PetscInt       numLabelCells, maxLabelCells, cStart, cEnd, c, vStart, vEnd, v;
     83:   PetscMPIInt    size, rank, proc, tag;

     87:   PetscObjectGetComm((PetscObject)dm,&comm);
     88:   PetscCommGetNewTag(comm, &tag);
     89:   MPI_Comm_size(comm, &size);
     90:   MPI_Comm_rank(comm, &rank);
     91:   DMGetDimension(dm, &dim);
     92:   DMPlexGetVTKCellHeight(dm, &cellHeight);
     93:   DMPlexGetHeightStratum(dm, cellHeight, &cStart, &cEnd);
     94:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
     95:   DMGetLabel(dm, "vtk", &label);
     96:   DMGetStratumSize(dm, "vtk", 1, &numLabelCells);
     97:   MPIU_Allreduce(&numLabelCells, &maxLabelCells, 1, MPIU_INT, MPI_MAX, comm);
     98:   if (!maxLabelCells) label = NULL;
     99:   for (c = cStart; c < cEnd; ++c) {
    100:     PetscInt *closure = NULL;
    101:     PetscInt closureSize, value;

    103:     if (label) {
    104:       DMLabelGetValue(label, c, &value);
    105:       if (value != 1) continue;
    106:     }
    107:     DMPlexGetTransitiveClosure(dm, c, PETSC_TRUE, &closureSize, &closure);
    108:     for (v = 0; v < closureSize*2; v += 2) {
    109:       if ((closure[v] >= vStart) && (closure[v] < vEnd)) ++numCorners;
    110:     }
    111:     DMPlexRestoreTransitiveClosure(dm, c, PETSC_TRUE, &closureSize, &closure);
    112:     ++numCells;
    113:   }
    114:   maxCells = numCells;
    115:   MPI_Reduce(&numCells, &totCells, 1, MPIU_INT, MPI_SUM, 0, comm);
    116:   MPI_Reduce(&numCells, &maxCells, 1, MPIU_INT, MPI_MAX, 0, comm);
    117:   MPI_Reduce(&numCorners, &totCorners, 1, MPIU_INT, MPI_SUM, 0, comm);
    118:   MPI_Reduce(&numCorners, &maxCorners, 1, MPIU_INT, MPI_MAX, 0, comm);
    119:   DMPlexGetVertexNumbering(dm, &globalVertexNumbers);
    120:   ISGetIndices(globalVertexNumbers, &gvertex);
    121:   PetscMalloc1(maxCells, &corners);
    122:   PetscFPrintf(comm, fp, "CELLS %D %D\n", totCells, totCorners+totCells);
    123:   if (!rank) {
    124:     PetscInt *remoteVertices, *vertices;

    126:     PetscMalloc1(maxCorners, &vertices);
    127:     for (c = cStart, numCells = 0; c < cEnd; ++c) {
    128:       PetscInt *closure = NULL;
    129:       PetscInt closureSize, value, nC = 0;

    131:       if (label) {
    132:         DMLabelGetValue(label, c, &value);
    133:         if (value != 1) continue;
    134:       }
    135:       DMPlexGetTransitiveClosure(dm, c, PETSC_TRUE, &closureSize, &closure);
    136:       for (v = 0; v < closureSize*2; v += 2) {
    137:         if ((closure[v] >= vStart) && (closure[v] < vEnd)) {
    138:           const PetscInt gv = gvertex[closure[v] - vStart];
    139:           vertices[nC++] = gv < 0 ? -(gv+1) : gv;
    140:         }
    141:       }
    142:       DMPlexRestoreTransitiveClosure(dm, c, PETSC_TRUE, &closureSize, &closure);
    143:       DMPlexReorderCell(dm, c, vertices);
    144:       corners[numCells++] = nC;
    145:       PetscFPrintf(comm, fp, "%D ", nC);
    146:       for (v = 0; v < nC; ++v) {
    147:         PetscFPrintf(comm, fp, " %D", vertices[v]);
    148:       }
    149:       PetscFPrintf(comm, fp, "\n");
    150:     }
    151:     if (size > 1) {PetscMalloc1(maxCorners+maxCells, &remoteVertices);}
    152:     for (proc = 1; proc < size; ++proc) {
    153:       MPI_Status status;

    155:       MPI_Recv(&numCorners, 1, MPIU_INT, proc, tag, comm, &status);
    156:       MPI_Recv(remoteVertices, numCorners, MPIU_INT, proc, tag, comm, &status);
    157:       for (c = 0; c < numCorners;) {
    158:         PetscInt nC = remoteVertices[c++];

    160:         for (v = 0; v < nC; ++v, ++c) {
    161:           vertices[v] = remoteVertices[c];
    162:         }
    163:         PetscFPrintf(comm, fp, "%D ", nC);
    164:         for (v = 0; v < nC; ++v) {
    165:           PetscFPrintf(comm, fp, " %D", vertices[v]);
    166:         }
    167:         PetscFPrintf(comm, fp, "\n");
    168:       }
    169:     }
    170:     if (size > 1) {PetscFree(remoteVertices);}
    171:     PetscFree(vertices);
    172:   } else {
    173:     PetscInt *localVertices, numSend = numCells+numCorners, k = 0;

    175:     PetscMalloc1(numSend, &localVertices);
    176:     for (c = cStart, numCells = 0; c < cEnd; ++c) {
    177:       PetscInt *closure = NULL;
    178:       PetscInt closureSize, value, nC = 0;

    180:       if (label) {
    181:         DMLabelGetValue(label, c, &value);
    182:         if (value != 1) continue;
    183:       }
    184:       DMPlexGetTransitiveClosure(dm, c, PETSC_TRUE, &closureSize, &closure);
    185:       for (v = 0; v < closureSize*2; v += 2) {
    186:         if ((closure[v] >= vStart) && (closure[v] < vEnd)) {
    187:           const PetscInt gv = gvertex[closure[v] - vStart];
    188:           closure[nC++] = gv < 0 ? -(gv+1) : gv;
    189:         }
    190:       }
    191:       corners[numCells++] = nC;
    192:       localVertices[k++]  = nC;
    193:       for (v = 0; v < nC; ++v, ++k) {
    194:         localVertices[k] = closure[v];
    195:       }
    196:       DMPlexRestoreTransitiveClosure(dm, c, PETSC_TRUE, &closureSize, &closure);
    197:       DMPlexReorderCell(dm, c, localVertices+k-nC);
    198:     }
    199:     if (k != numSend) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_PLIB, "Invalid number of vertices to send %D should be %D", k, numSend);
    200:     MPI_Send(&numSend, 1, MPIU_INT, 0, tag, comm);
    201:     MPI_Send(localVertices, numSend, MPIU_INT, 0, tag, comm);
    202:     PetscFree(localVertices);
    203:   }
    204:   ISRestoreIndices(globalVertexNumbers, &gvertex);
    205:   PetscFPrintf(comm, fp, "CELL_TYPES %D\n", totCells);
    206:   if (!rank) {
    207:     PetscInt cellType;

    209:     for (c = 0; c < numCells; ++c) {
    210:       DMPlexVTKGetCellType_Internal(dm, dim, corners[c], &cellType);
    211:       PetscFPrintf(comm, fp, "%D\n", cellType);
    212:     }
    213:     for (proc = 1; proc < size; ++proc) {
    214:       MPI_Status status;

    216:       MPI_Recv(&numCells, 1, MPIU_INT, proc, tag, comm, &status);
    217:       MPI_Recv(corners, numCells, MPIU_INT, proc, tag, comm, &status);
    218:       for (c = 0; c < numCells; ++c) {
    219:         DMPlexVTKGetCellType_Internal(dm, dim, corners[c], &cellType);
    220:         PetscFPrintf(comm, fp, "%D\n", cellType);
    221:       }
    222:     }
    223:   } else {
    224:     MPI_Send(&numCells, 1, MPIU_INT, 0, tag, comm);
    225:     MPI_Send(corners, numCells, MPIU_INT, 0, tag, comm);
    226:   }
    227:   PetscFree(corners);
    228:   *totalCells = totCells;
    229:   return(0);
    230: }

    232: static PetscErrorCode DMPlexVTKWritePartition_ASCII(DM dm, FILE *fp)
    233: {
    234:   MPI_Comm       comm;
    235:   PetscInt       numCells = 0, cellHeight;
    236:   PetscInt       numLabelCells, cStart, cEnd, c;
    237:   PetscMPIInt    size, rank, proc, tag;
    238:   PetscBool      hasLabel;

    242:   PetscObjectGetComm((PetscObject)dm,&comm);
    243:   PetscCommGetNewTag(comm, &tag);
    244:   MPI_Comm_size(comm, &size);
    245:   MPI_Comm_rank(comm, &rank);
    246:   DMPlexGetVTKCellHeight(dm, &cellHeight);
    247:   DMPlexGetHeightStratum(dm, cellHeight, &cStart, &cEnd);
    248:   DMGetStratumSize(dm, "vtk", 1, &numLabelCells);
    249:   hasLabel = numLabelCells > 0 ? PETSC_TRUE : PETSC_FALSE;
    250:   for (c = cStart; c < cEnd; ++c) {
    251:     if (hasLabel) {
    252:       PetscInt value;

    254:       DMGetLabelValue(dm, "vtk", c, &value);
    255:       if (value != 1) continue;
    256:     }
    257:     ++numCells;
    258:   }
    259:   if (!rank) {
    260:     for (c = 0; c < numCells; ++c) {PetscFPrintf(comm, fp, "%d\n", rank);}
    261:     for (proc = 1; proc < size; ++proc) {
    262:       MPI_Status status;

    264:       MPI_Recv(&numCells, 1, MPIU_INT, proc, tag, comm, &status);
    265:       for (c = 0; c < numCells; ++c) {PetscFPrintf(comm, fp, "%d\n", proc);}
    266:     }
    267:   } else {
    268:     MPI_Send(&numCells, 1, MPIU_INT, 0, tag, comm);
    269:   }
    270:   return(0);
    271: }

    273: #if defined(PETSC_USE_REAL_DOUBLE) || defined(PETSC_USE_REAL___FLOAT128)
    274: typedef double PetscVTKReal;
    275: #elif defined(PETSC_USE_REAL_SINGLE) || defined(PETSC_USE_REAL___FP16)
    276: typedef float PetscVTKReal;
    277: #else
    278: typedef PetscReal PetscVTKReal;
    279: #endif

    281: static PetscErrorCode DMPlexVTKWriteSection_ASCII(DM dm, PetscSection section, PetscSection globalSection, Vec v, FILE *fp, PetscInt enforceDof, PetscInt precision, PetscReal scale, PetscInt imag)
    282: {
    283:   MPI_Comm           comm;
    284:   const MPI_Datatype mpiType = MPIU_SCALAR;
    285:   PetscScalar        *array;
    286:   PetscInt           numDof = 0, maxDof;
    287:   PetscInt           numLabelCells, cellHeight, cStart, cEnd, numLabelVertices, vStart, vEnd, pStart, pEnd, p;
    288:   PetscMPIInt        size, rank, proc, tag;
    289:   PetscBool          hasLabel;
    290:   PetscErrorCode     ierr;

    293:   PetscObjectGetComm((PetscObject)dm,&comm);
    296:   if (precision < 0) precision = 6;
    297:   PetscCommGetNewTag(comm, &tag);
    298:   MPI_Comm_size(comm, &size);
    299:   MPI_Comm_rank(comm, &rank);
    300:   PetscSectionGetChart(section, &pStart, &pEnd);
    301:   /* VTK only wants the values at cells or vertices */
    302:   DMPlexGetVTKCellHeight(dm, &cellHeight);
    303:   DMPlexGetHeightStratum(dm, cellHeight, &cStart, &cEnd);
    304:   DMPlexGetDepthStratum(dm, 0, &vStart, &vEnd);
    305:   pStart   = PetscMax(PetscMin(cStart, vStart), pStart);
    306:   pEnd     = PetscMin(PetscMax(cEnd,   vEnd),   pEnd);
    307:   DMGetStratumSize(dm, "vtk", 1, &numLabelCells);
    308:   DMGetStratumSize(dm, "vtk", 2, &numLabelVertices);
    309:   hasLabel = numLabelCells > 0 || numLabelVertices > 0 ? PETSC_TRUE : PETSC_FALSE;
    310:   for (p = pStart; p < pEnd; ++p) {
    311:     /* Reject points not either cells or vertices */
    312:     if (((p < cStart) || (p >= cEnd)) && ((p < vStart) || (p >= vEnd))) continue;
    313:     if (hasLabel) {
    314:       PetscInt value;

    316:       if (((p >= cStart) && (p < cEnd) && numLabelCells) ||
    317:           ((p >= vStart) && (p < vEnd) && numLabelVertices)) {
    318:         DMGetLabelValue(dm, "vtk", p, &value);
    319:         if (value != 1) continue;
    320:       }
    321:     }
    322:     PetscSectionGetDof(section, p, &numDof);
    323:     if (numDof) break;
    324:   }
    325:   MPIU_Allreduce(&numDof, &maxDof, 1, MPIU_INT, MPI_MAX, comm);
    326:   enforceDof = PetscMax(enforceDof, maxDof);
    327:   VecGetArray(v, &array);
    328:   if (!rank) {
    329:     PetscVTKReal dval;
    330:     PetscScalar  val;
    331:     char formatString[8];

    333:     PetscSNPrintf(formatString, 8, "%%.%de", precision);
    334:     for (p = pStart; p < pEnd; ++p) {
    335:       /* Here we lose a way to filter points by keeping them out of the Numbering */
    336:       PetscInt dof, off, goff, d;

    338:       /* Reject points not either cells or vertices */
    339:       if (((p < cStart) || (p >= cEnd)) && ((p < vStart) || (p >= vEnd))) continue;
    340:       if (hasLabel) {
    341:         PetscInt value;

    343:         if (((p >= cStart) && (p < cEnd) && numLabelCells) ||
    344:             ((p >= vStart) && (p < vEnd) && numLabelVertices)) {
    345:           DMGetLabelValue(dm, "vtk", p, &value);
    346:           if (value != 1) continue;
    347:         }
    348:       }
    349:       PetscSectionGetDof(section, p, &dof);
    350:       PetscSectionGetOffset(section, p, &off);
    351:       PetscSectionGetOffset(globalSection, p, &goff);
    352:       if (dof && goff >= 0) {
    353:         for (d = 0; d < dof; d++) {
    354:           if (d > 0) {
    355:             PetscFPrintf(comm, fp, " ");
    356:           }
    357:           val = array[off+d];
    358:           dval = (PetscVTKReal) ((imag ? PetscImaginaryPart(val) : PetscRealPart(val)) * scale);
    359:           PetscFPrintf(comm, fp, formatString, dval);
    360:         }
    361:         for (d = dof; d < enforceDof; d++) {
    362:           PetscFPrintf(comm, fp, " 0.0");
    363:         }
    364:         PetscFPrintf(comm, fp, "\n");
    365:       }
    366:     }
    367:     for (proc = 1; proc < size; ++proc) {
    368:       PetscScalar *remoteValues;
    369:       PetscInt    size = 0, d;
    370:       MPI_Status  status;

    372:       MPI_Recv(&size, 1, MPIU_INT, proc, tag, comm, &status);
    373:       PetscMalloc1(size, &remoteValues);
    374:       MPI_Recv(remoteValues, size, mpiType, proc, tag, comm, &status);
    375:       for (p = 0; p < size/maxDof; ++p) {
    376:         for (d = 0; d < maxDof; ++d) {
    377:           if (d > 0) {
    378:             PetscFPrintf(comm, fp, " ");
    379:           }
    380:           val = remoteValues[p*maxDof+d];
    381:           dval = (PetscVTKReal) ((imag ? PetscImaginaryPart(val) : PetscRealPart(val)) * scale);
    382:           PetscFPrintf(comm, fp, formatString, dval);
    383:         }
    384:         for (d = maxDof; d < enforceDof; ++d) {
    385:           PetscFPrintf(comm, fp, " 0.0");
    386:         }
    387:         PetscFPrintf(comm, fp, "\n");
    388:       }
    389:       PetscFree(remoteValues);
    390:     }
    391:   } else {
    392:     PetscScalar *localValues;
    393:     PetscInt    size, k = 0;

    395:     PetscSectionGetStorageSize(section, &size);
    396:     PetscMalloc1(size, &localValues);
    397:     for (p = pStart; p < pEnd; ++p) {
    398:       PetscInt dof, off, goff, d;

    400:       /* Reject points not either cells or vertices */
    401:       if (((p < cStart) || (p >= cEnd)) && ((p < vStart) || (p >= vEnd))) continue;
    402:       if (hasLabel) {
    403:         PetscInt value;

    405:         if (((p >= cStart) && (p < cEnd) && numLabelCells) ||
    406:             ((p >= vStart) && (p < vEnd) && numLabelVertices)) {
    407:           DMGetLabelValue(dm, "vtk", p, &value);
    408:           if (value != 1) continue;
    409:         }
    410:       }
    411:       PetscSectionGetDof(section, p, &dof);
    412:       PetscSectionGetOffset(section, p, &off);
    413:       PetscSectionGetOffset(globalSection, p, &goff);
    414:       if (goff >= 0) {
    415:         for (d = 0; d < dof; ++d) {
    416:           localValues[k++] = array[off+d];
    417:         }
    418:       }
    419:     }
    420:     MPI_Send(&k, 1, MPIU_INT, 0, tag, comm);
    421:     MPI_Send(localValues, k, mpiType, 0, tag, comm);
    422:     PetscFree(localValues);
    423:   }
    424:   VecRestoreArray(v, &array);
    425:   return(0);
    426: }

    428: static PetscErrorCode DMPlexVTKWriteField_ASCII(DM dm, PetscSection section, PetscSection globalSection, Vec field, const char name[], FILE *fp, PetscInt enforceDof, PetscInt precision, PetscReal scale, PetscBool nameComplex, PetscInt imag)
    429: {
    430:   MPI_Comm       comm;
    431:   PetscInt       numDof = 0, maxDof;
    432:   PetscInt       pStart, pEnd, p;

    436:   PetscObjectGetComm((PetscObject)dm,&comm);
    437:   PetscSectionGetChart(section, &pStart, &pEnd);
    438:   for (p = pStart; p < pEnd; ++p) {
    439:     PetscSectionGetDof(section, p, &numDof);
    440:     if (numDof) break;
    441:   }
    442:   numDof = PetscMax(numDof, enforceDof);
    443:   MPIU_Allreduce(&numDof, &maxDof, 1, MPIU_INT, MPI_MAX, PetscObjectComm((PetscObject)dm));
    444:   if (!name) name = "Unknown";
    445:   if (maxDof == 3) {
    446:     if (nameComplex) {
    447:       PetscFPrintf(comm, fp, "VECTORS %s.%s double\n", name, imag ? "Im" : "Re");
    448:     } else {
    449:       PetscFPrintf(comm, fp, "VECTORS %s double\n", name);
    450:     }
    451:   } else {
    452:     if (nameComplex) {
    453:       PetscFPrintf(comm, fp, "SCALARS %s.%s double %D\n", name, imag ? "Im" : "Re", maxDof);
    454:     } else {
    455:       PetscFPrintf(comm, fp, "SCALARS %s double %D\n", name, maxDof);
    456:     }
    457:     PetscFPrintf(comm, fp, "LOOKUP_TABLE default\n");
    458:   }
    459:   DMPlexVTKWriteSection_ASCII(dm, section, globalSection, field, fp, enforceDof, precision, scale, imag);
    460:   return(0);
    461: }

    463: static PetscErrorCode DMPlexVTKWriteAll_ASCII(DM dm, PetscViewer viewer)
    464: {
    465:   MPI_Comm                 comm;
    466:   PetscViewer_VTK          *vtk = (PetscViewer_VTK*) viewer->data;
    467:   FILE                     *fp;
    468:   PetscViewerVTKObjectLink link;
    469:   PetscSection             coordSection, globalCoordSection;
    470:   PetscLayout              vLayout;
    471:   Vec                      coordinates;
    472:   PetscReal                lengthScale;
    473:   PetscInt                 totVertices, totCells = 0, loops_per_scalar, l;
    474:   PetscBool                hasPoint = PETSC_FALSE, hasCell = PETSC_FALSE, writePartition = PETSC_FALSE, localized, writeComplex;
    475:   PetscErrorCode           ierr;

    478: #if defined(PETSC_USE_COMPLEX)
    479:   loops_per_scalar = 2;
    480:   writeComplex = PETSC_TRUE;
    481: #else
    482:   loops_per_scalar = 1;
    483:   writeComplex = PETSC_FALSE;
    484: #endif
    485:   DMGetCoordinatesLocalized(dm,&localized);
    486:   if (localized) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"VTK output with localized coordinates not yet supported");
    487:   PetscObjectGetComm((PetscObject)dm,&comm);
    488:   PetscFOpen(comm, vtk->filename, "wb", &fp);
    489:   PetscFPrintf(comm, fp, "# vtk DataFile Version 2.0\n");
    490:   PetscFPrintf(comm, fp, "Simplicial Mesh Example\n");
    491:   PetscFPrintf(comm, fp, "ASCII\n");
    492:   PetscFPrintf(comm, fp, "DATASET UNSTRUCTURED_GRID\n");
    493:   /* Vertices */
    494:   DMPlexGetScale(dm, PETSC_UNIT_LENGTH, &lengthScale);
    495:   DMGetCoordinateSection(dm, &coordSection);
    496:   PetscSectionCreateGlobalSection(coordSection, dm->sf, PETSC_FALSE, PETSC_FALSE, &globalCoordSection);
    497:   DMGetCoordinatesLocal(dm, &coordinates);
    498:   PetscSectionGetPointLayout(PetscObjectComm((PetscObject)dm), globalCoordSection, &vLayout);
    499:   PetscLayoutGetSize(vLayout, &totVertices);
    500:   PetscFPrintf(comm, fp, "POINTS %D double\n", totVertices);
    501:   DMPlexVTKWriteSection_ASCII(dm, coordSection, globalCoordSection, coordinates, fp, 3, PETSC_DETERMINE, lengthScale, 0);
    502:   /* Cells */
    503:   DMPlexVTKWriteCells_ASCII(dm, fp, &totCells);
    504:   /* Vertex fields */
    505:   for (link = vtk->link; link; link = link->next) {
    506:     if ((link->ft == PETSC_VTK_POINT_FIELD) || (link->ft == PETSC_VTK_POINT_VECTOR_FIELD)) hasPoint = PETSC_TRUE;
    507:     if ((link->ft == PETSC_VTK_CELL_FIELD)  || (link->ft == PETSC_VTK_CELL_VECTOR_FIELD))  hasCell  = PETSC_TRUE;
    508:   }
    509:   if (hasPoint) {
    510:     PetscFPrintf(comm, fp, "POINT_DATA %D\n", totVertices);
    511:     for (link = vtk->link; link; link = link->next) {
    512:       Vec          X = (Vec) link->vec;
    513:       PetscSection section = NULL, globalSection, newSection = NULL;
    514:       char         namebuf[256];
    515:       const char   *name;
    516:       PetscInt     enforceDof = PETSC_DETERMINE;

    518:       if ((link->ft != PETSC_VTK_POINT_FIELD) && (link->ft != PETSC_VTK_POINT_VECTOR_FIELD)) continue;
    519:       if (link->ft == PETSC_VTK_POINT_VECTOR_FIELD) enforceDof = 3;
    520:       PetscObjectGetName(link->vec, &name);
    521:       PetscObjectQuery(link->vec, "section", (PetscObject*) &section);
    522:       if (!section) {
    523:         DM           dmX;

    525:         VecGetDM(X, &dmX);
    526:         if (dmX) {
    527:           DMLabel  subpointMap, subpointMapX;
    528:           PetscInt dim, dimX, pStart, pEnd, qStart, qEnd;

    530:           DMGetLocalSection(dmX, &section);
    531:           /* Here is where we check whether dmX is a submesh of dm */
    532:           DMGetDimension(dm,  &dim);
    533:           DMGetDimension(dmX, &dimX);
    534:           DMPlexGetChart(dm,  &pStart, &pEnd);
    535:           DMPlexGetChart(dmX, &qStart, &qEnd);
    536:           DMPlexGetSubpointMap(dm,  &subpointMap);
    537:           DMPlexGetSubpointMap(dmX, &subpointMapX);
    538:           if (((dim != dimX) || ((pEnd-pStart) < (qEnd-qStart))) && subpointMap && !subpointMapX) {
    539:             const PetscInt *ind = NULL;
    540:             IS              subpointIS;
    541:             PetscInt        n = 0, q;

    543:             PetscSectionGetChart(section, &qStart, &qEnd);
    544:             DMPlexGetSubpointIS(dm, &subpointIS);
    545:             if (subpointIS) {
    546:               ISGetLocalSize(subpointIS, &n);
    547:               ISGetIndices(subpointIS, &ind);
    548:             }
    549:             PetscSectionCreate(comm, &newSection);
    550:             PetscSectionSetChart(newSection, pStart, pEnd);
    551:             for (q = qStart; q < qEnd; ++q) {
    552:               PetscInt dof, off, p;

    554:               PetscSectionGetDof(section, q, &dof);
    555:               if (dof) {
    556:                 PetscFindInt(q, n, ind, &p);
    557:                 if (p >= pStart) {
    558:                   PetscSectionSetDof(newSection, p, dof);
    559:                   PetscSectionGetOffset(section, q, &off);
    560:                   PetscSectionSetOffset(newSection, p, off);
    561:                 }
    562:               }
    563:             }
    564:             if (subpointIS) {
    565:               ISRestoreIndices(subpointIS, &ind);
    566:             }
    567:             /* No need to setup section */
    568:             section = newSection;
    569:           }
    570:         }
    571:       }
    572:       if (!section) SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Vector %s had no PetscSection composed with it and could not create one from VecGetDM()", name);
    573:       if (link->field >= 0) {
    574:         const char *fieldname;

    576:         PetscSectionGetFieldName(section, link->field, &fieldname);
    577:         PetscSectionGetField(section, link->field, &section);
    578:         if (fieldname) {
    579:           PetscSNPrintf(namebuf, sizeof(namebuf), "%s%s", name, fieldname);
    580:         } else {
    581:           PetscSNPrintf(namebuf, sizeof(namebuf), "%s%D", name, link->field);
    582:         }
    583:       } else {
    584:         PetscSNPrintf(namebuf, sizeof(namebuf), "%s", name);
    585:       }
    586:       PetscViewerVTKSanitizeName_Internal(namebuf, sizeof(namebuf));
    587:       PetscSectionCreateGlobalSection(section, dm->sf, PETSC_FALSE, PETSC_FALSE, &globalSection);
    588:       for (l = 0; l < loops_per_scalar; l++) {
    589:         DMPlexVTKWriteField_ASCII(dm, section, globalSection, X, namebuf, fp, enforceDof, PETSC_DETERMINE, 1.0, writeComplex, l);
    590:       }
    591:       PetscSectionDestroy(&globalSection);
    592:       if (newSection) {PetscSectionDestroy(&newSection);}
    593:     }
    594:   }
    595:   /* Cell Fields */
    596:   PetscOptionsGetBool(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-dm_view_partition", &writePartition, NULL);
    597:   if (hasCell || writePartition) {
    598:     PetscFPrintf(comm, fp, "CELL_DATA %D\n", totCells);
    599:     for (link = vtk->link; link; link = link->next) {
    600:       Vec          X = (Vec) link->vec;
    601:       PetscSection section = NULL, globalSection;
    602:       const char   *name = "";
    603:       char         namebuf[256];
    604:       PetscInt     enforceDof = PETSC_DETERMINE;

    606:       if ((link->ft != PETSC_VTK_CELL_FIELD) && (link->ft != PETSC_VTK_CELL_VECTOR_FIELD)) continue;
    607:       if (link->ft == PETSC_VTK_CELL_VECTOR_FIELD) enforceDof = 3;
    608:       PetscObjectGetName(link->vec, &name);
    609:       PetscObjectQuery(link->vec, "section", (PetscObject*) &section);
    610:       if (!section) {
    611:         DM           dmX;

    613:         VecGetDM(X, &dmX);
    614:         if (dmX) {
    615:           DMGetLocalSection(dmX, &section);
    616:         }
    617:       }
    618:       if (!section) SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Vector %s had no PetscSection composed with it and could not create one from VecGetDM()", name);
    619:       if (link->field >= 0) {
    620:         const char *fieldname;

    622:         PetscSectionGetFieldName(section, link->field, &fieldname);
    623:         PetscSectionGetField(section, link->field, &section);
    624:         if (fieldname) {
    625:           PetscSNPrintf(namebuf, sizeof(namebuf), "%s%s", name, fieldname);
    626:         } else {
    627:           PetscSNPrintf(namebuf, sizeof(namebuf), "%s%D", name, link->field);
    628:         }
    629:       } else {
    630:         PetscSNPrintf(namebuf, sizeof(namebuf), "%s", name);
    631:       }
    632:       PetscViewerVTKSanitizeName_Internal(namebuf, sizeof(namebuf));
    633:       PetscSectionCreateGlobalSection(section, dm->sf, PETSC_FALSE, PETSC_FALSE, &globalSection);
    634:       for (l = 0; l < loops_per_scalar; l++) {
    635:         DMPlexVTKWriteField_ASCII(dm, section, globalSection, X, namebuf, fp, enforceDof, PETSC_DETERMINE, 1.0, writeComplex, l);
    636:       }
    637:       PetscSectionDestroy(&globalSection);
    638:     }
    639:     if (writePartition) {
    640:       PetscFPrintf(comm, fp, "SCALARS partition int 1\n");
    641:       PetscFPrintf(comm, fp, "LOOKUP_TABLE default\n");
    642:       DMPlexVTKWritePartition_ASCII(dm, fp);
    643:     }
    644:   }
    645:   /* Cleanup */
    646:   PetscSectionDestroy(&globalCoordSection);
    647:   PetscLayoutDestroy(&vLayout);
    648:   PetscFClose(comm, fp);
    649:   return(0);
    650: }

    652: /*@C
    653:   DMPlexVTKWriteAll - Write a file containing all the fields that have been provided to the viewer

    655:   Collective

    657:   Input Arguments:
    658: + odm - The DMPlex specifying the mesh, passed as a PetscObject
    659: - viewer - viewer of type VTK

    661:   Level: developer

    663:   Note:
    664:   This function is a callback used by the VTK viewer to actually write the file.
    665:   The reason for this odd model is that the VTK file format does not provide any way to write one field at a time.
    666:   Instead, metadata for the entire file needs to be available up-front before you can start writing the file.

    668: .seealso: PETSCVIEWERVTK
    669: @*/
    670: PetscErrorCode DMPlexVTKWriteAll(PetscObject odm, PetscViewer viewer)
    671: {
    672:   DM             dm = (DM) odm;
    673:   PetscBool      isvtk;

    679:   PetscObjectTypeCompare((PetscObject) viewer, PETSCVIEWERVTK, &isvtk);
    680:   if (!isvtk) SETERRQ1(PetscObjectComm((PetscObject)viewer), PETSC_ERR_ARG_INCOMP, "Cannot use viewer type %s", ((PetscObject)viewer)->type_name);
    681:   switch (viewer->format) {
    682:   case PETSC_VIEWER_ASCII_VTK_DEPRECATED:
    683:     DMPlexVTKWriteAll_ASCII(dm, viewer);
    684:     break;
    685:   case PETSC_VIEWER_VTK_VTU:
    686:     DMPlexVTKWriteAll_VTU(dm, viewer);
    687:     break;
    688:   default: SETERRQ1(PetscObjectComm((PetscObject)dm), PETSC_ERR_SUP, "No support for format '%s'", PetscViewerFormats[viewer->format]);
    689:   }
    690:   return(0);
    691: }