Actual source code: plexglvis.c
petsc-3.13.6 2020-09-29
Report Typos and Errors

      1:  #include <petsc/private/glvisviewerimpl.h>
      2:  #include <petsc/private/petscimpl.h>
      3:  #include <petsc/private/dmpleximpl.h>
      4:  #include <petscbt.h>
      5:  #include <petscdmplex.h>
      6:  #include <petscsf.h>
      7:  #include <petscds.h>

      9: typedef struct {
     10:   PetscInt   nf;
     11:   VecScatter *scctx;
     12: } GLVisViewerCtx;

     14: static PetscErrorCode DestroyGLVisViewerCtx_Private(void *vctx)
     15: {
     16:   GLVisViewerCtx *ctx = (GLVisViewerCtx*)vctx;
     17:   PetscInt       i;

     21:   for (i=0;i<ctx->nf;i++) {
     22:     VecScatterDestroy(&ctx->scctx[i]);
     23:   }
     24:   PetscFree(ctx->scctx);
     25:   PetscFree(vctx);
     26:   return(0);
     27: }

     29: static PetscErrorCode DMPlexSampleGLVisFields_Private(PetscObject oX, PetscInt nf, PetscObject oXfield[], void *vctx)
     30: {
     31:   GLVisViewerCtx *ctx = (GLVisViewerCtx*)vctx;
     32:   PetscInt       f;

     36:   for (f=0;f<nf;f++) {
     37:     VecScatterBegin(ctx->scctx[f],(Vec)oX,(Vec)oXfield[f],INSERT_VALUES,SCATTER_FORWARD);
     38:     VecScatterEnd(ctx->scctx[f],(Vec)oX,(Vec)oXfield[f],INSERT_VALUES,SCATTER_FORWARD);
     39:   }
     40:   return(0);
     41: }

     43: /* for FEM, it works for H1 fields only and extracts dofs at cell vertices, discarding any other dof */
     44: PetscErrorCode DMSetUpGLVisViewer_Plex(PetscObject odm, PetscViewer viewer)
     45: {
     46:   DM             dm = (DM)odm;
     47:   Vec            xlocal,xfield,*Ufield;
     48:   PetscDS        ds;
     49:   IS             globalNum,isfield;
     50:   PetscBT        vown;
     51:   char           **fieldname = NULL,**fec_type = NULL;
     52:   const PetscInt *gNum;
     53:   PetscInt       *nlocal,*bs,*idxs,*dims;
     54:   PetscInt       f,maxfields,nfields,c,totc,totdofs,Nv,cum,i;
     55:   PetscInt       dim,cStart,cEnd,vStart,vEnd;
     56:   GLVisViewerCtx *ctx;
     57:   PetscSection   s;

     61:   DMGetDimension(dm,&dim);
     62:   DMPlexGetDepthStratum(dm,0,&vStart,&vEnd);
     63:   DMPlexGetHeightStratum(dm,0,&cStart,&cEnd);
     64:   PetscObjectQuery((PetscObject)dm,"_glvis_plex_gnum",(PetscObject*)&globalNum);
     65:   if (!globalNum) {
     66:     DMPlexCreateCellNumbering_Internal(dm,PETSC_TRUE,&globalNum);
     67:     PetscObjectCompose((PetscObject)dm,"_glvis_plex_gnum",(PetscObject)globalNum);
     68:     PetscObjectDereference((PetscObject)globalNum);
     69:   }
     70:   ISGetIndices(globalNum,&gNum);
     71:   PetscBTCreate(vEnd-vStart,&vown);
     72:   for (c = cStart, totc = 0; c < cEnd; c++) {
     73:     if (gNum[c-cStart] >= 0) {
     74:       PetscInt i,numPoints,*points = NULL;

     76:       totc++;
     77:       DMPlexGetTransitiveClosure(dm,c,PETSC_TRUE,&numPoints,&points);
     78:       for (i=0;i<numPoints*2;i+= 2) {
     79:         if ((points[i] >= vStart) && (points[i] < vEnd)) {
     80:           PetscBTSet(vown,points[i]-vStart);
     81:         }
     82:       }
     83:       DMPlexRestoreTransitiveClosure(dm,c,PETSC_TRUE,&numPoints,&points);
     84:     }
     85:   }
     86:   for (f=0,Nv=0;f<vEnd-vStart;f++) if (PetscLikely(PetscBTLookup(vown,f))) Nv++;

     88:   DMCreateLocalVector(dm,&xlocal);
     89:   VecGetLocalSize(xlocal,&totdofs);
     90:   DMGetLocalSection(dm,&s);
     91:   PetscSectionGetNumFields(s,&nfields);
     92:   for (f=0,maxfields=0;f<nfields;f++) {
     93:     PetscInt bs;

     95:     PetscSectionGetFieldComponents(s,f,&bs);
     96:     maxfields += bs;
     97:   }
     98:   PetscCalloc7(maxfields,&fieldname,maxfields,&nlocal,maxfields,&bs,maxfields,&dims,maxfields,&fec_type,totdofs,&idxs,maxfields,&Ufield);
     99:   PetscNew(&ctx);
    100:   PetscCalloc1(maxfields,&ctx->scctx);
    101:   DMGetDS(dm,&ds);
    102:   if (ds) {
    103:     for (f=0;f<nfields;f++) {
    104:       const char* fname;
    105:       char        name[256];
    106:       PetscObject disc;
    107:       size_t      len;

    109:       PetscSectionGetFieldName(s,f,&fname);
    110:       PetscStrlen(fname,&len);
    111:       if (len) {
    112:         PetscStrcpy(name,fname);
    113:       } else {
    114:         PetscSNPrintf(name,256,"Field%D",f);
    115:       }
    116:       PetscDSGetDiscretization(ds,f,&disc);
    117:       if (disc) {
    118:         PetscClassId id;
    119:         PetscInt     Nc;
    120:         char         fec[64];

    122:         PetscObjectGetClassId(disc, &id);
    123:         if (id == PETSCFE_CLASSID) {
    124:           PetscFE            fem = (PetscFE)disc;
    125:           PetscDualSpace     sp;
    126:           PetscDualSpaceType spname;
    127:           PetscInt           order;
    128:           PetscBool          islag,continuous,H1 = PETSC_TRUE;

    130:           PetscFEGetNumComponents(fem,&Nc);
    131:           PetscFEGetDualSpace(fem,&sp);
    132:           PetscDualSpaceGetType(sp,&spname);
    133:           PetscStrcmp(spname,PETSCDUALSPACELAGRANGE,&islag);
    134:           if (!islag) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Unsupported dual space");
    135:           PetscDualSpaceLagrangeGetContinuity(sp,&continuous);
    136:           PetscDualSpaceGetOrder(sp,&order);
    137:           if (continuous && order > 0) { /* no support for high-order viz, still have to figure out the numbering */
    138:             PetscSNPrintf(fec,64,"FiniteElementCollection: H1_%DD_P1",dim);
    139:           } else {
    140:             if (!continuous && order) SETERRQ1(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Discontinuous space visualization currently unsupported for order %D",order);
    141:             H1   = PETSC_FALSE;
    142:             PetscSNPrintf(fec,64,"FiniteElementCollection: L2_%DD_P%D",dim,order);
    143:           }
    144:           PetscStrallocpy(name,&fieldname[ctx->nf]);
    145:           bs[ctx->nf]   = Nc;
    146:           dims[ctx->nf] = dim;
    147:           if (H1) {
    148:             nlocal[ctx->nf] = Nc * Nv;
    149:             PetscStrallocpy(fec,&fec_type[ctx->nf]);
    150:             VecCreateSeq(PETSC_COMM_SELF,Nv*Nc,&xfield);
    151:             for (i=0,cum=0;i<vEnd-vStart;i++) {
    152:               PetscInt j,off;

    154:               if (PetscUnlikely(!PetscBTLookup(vown,i))) continue;
    155:               PetscSectionGetFieldOffset(s,i+vStart,f,&off);
    156:               for (j=0;j<Nc;j++) idxs[cum++] = off + j;
    157:             }
    158:             ISCreateGeneral(PetscObjectComm((PetscObject)xlocal),Nv*Nc,idxs,PETSC_USE_POINTER,&isfield);
    159:           } else {
    160:             nlocal[ctx->nf] = Nc * totc;
    161:             PetscStrallocpy(fec,&fec_type[ctx->nf]);
    162:             VecCreateSeq(PETSC_COMM_SELF,Nc*totc,&xfield);
    163:             for (i=0,cum=0;i<cEnd-cStart;i++) {
    164:               PetscInt j,off;

    166:               if (PetscUnlikely(gNum[i] < 0)) continue;
    167:               PetscSectionGetFieldOffset(s,i+cStart,f,&off);
    168:               for (j=0;j<Nc;j++) idxs[cum++] = off + j;
    169:             }
    170:             ISCreateGeneral(PetscObjectComm((PetscObject)xlocal),totc*Nc,idxs,PETSC_USE_POINTER,&isfield);
    171:           }
    172:           VecScatterCreate(xlocal,isfield,xfield,NULL,&ctx->scctx[ctx->nf]);
    173:           VecDestroy(&xfield);
    174:           ISDestroy(&isfield);
    175:           ctx->nf++;
    176:         } else if (id == PETSCFV_CLASSID) {
    177:           PetscInt c;

    179:           PetscFVGetNumComponents((PetscFV)disc,&Nc);
    180:           PetscSNPrintf(fec,64,"FiniteElementCollection: L2_%DD_P0",dim);
    181:           for (c = 0; c < Nc; c++) {
    182:             char comp[256];
    183:             PetscSNPrintf(comp,256,"%s-Comp%D",name,c);
    184:             PetscStrallocpy(comp,&fieldname[ctx->nf]);
    185:             bs[ctx->nf] = 1; /* Does PetscFV support components with different block size? */
    186:             nlocal[ctx->nf] = totc;
    187:             dims[ctx->nf] = dim;
    188:             PetscStrallocpy(fec,&fec_type[ctx->nf]);
    189:             VecCreateSeq(PETSC_COMM_SELF,totc,&xfield);
    190:             for (i=0,cum=0;i<cEnd-cStart;i++) {
    191:               PetscInt off;

    193:               if (PetscUnlikely(gNum[i])<0) continue;
    194:               PetscSectionGetFieldOffset(s,i+cStart,f,&off);
    195:               idxs[cum++] = off + c;
    196:             }
    197:             ISCreateGeneral(PetscObjectComm((PetscObject)xlocal),totc,idxs,PETSC_USE_POINTER,&isfield);
    198:             VecScatterCreate(xlocal,isfield,xfield,NULL,&ctx->scctx[ctx->nf]);
    199:             VecDestroy(&xfield);
    200:             ISDestroy(&isfield);
    201:             ctx->nf++;
    202:           }
    203:         } else SETERRQ1(PetscObjectComm((PetscObject)dm),PETSC_ERR_ARG_WRONG,"Unknown discretization type for field %D",f);
    204:       } else SETERRQ1(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Missing discretization for field %D",f);
    205:     }
    206:   } else SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Needs a DS attached to the DM");
    207:   PetscBTDestroy(&vown);
    208:   VecDestroy(&xlocal);
    209:   ISRestoreIndices(globalNum,&gNum);

    211:   /* create work vectors */
    212:   for (f=0;f<ctx->nf;f++) {
    213:     VecCreateMPI(PetscObjectComm((PetscObject)dm),nlocal[f],PETSC_DECIDE,&Ufield[f]);
    214:     PetscObjectSetName((PetscObject)Ufield[f],fieldname[f]);
    215:     VecSetBlockSize(Ufield[f],bs[f]);
    216:     VecSetDM(Ufield[f],dm);
    217:   }

    219:   /* customize the viewer */
    220:   PetscViewerGLVisSetFields(viewer,ctx->nf,(const char**)fec_type,dims,DMPlexSampleGLVisFields_Private,(PetscObject*)Ufield,ctx,DestroyGLVisViewerCtx_Private);
    221:   for (f=0;f<ctx->nf;f++) {
    222:     PetscFree(fieldname[f]);
    223:     PetscFree(fec_type[f]);
    224:     VecDestroy(&Ufield[f]);
    225:   }
    226:   PetscFree7(fieldname,nlocal,bs,dims,fec_type,idxs,Ufield);
    227:   return(0);
    228: }

    230: typedef enum {MFEM_POINT=0,MFEM_SEGMENT,MFEM_TRIANGLE,MFEM_SQUARE,MFEM_TETRAHEDRON,MFEM_CUBE,MFEM_PRISM,MFEM_UNDEF} MFEM_cid;

    232: MFEM_cid mfem_table_cid[4][7]       = { {MFEM_POINT,MFEM_UNDEF,MFEM_UNDEF  ,MFEM_UNDEF   ,MFEM_UNDEF      ,MFEM_UNDEF,MFEM_UNDEF},
    233:                                         {MFEM_POINT,MFEM_UNDEF,MFEM_SEGMENT,MFEM_UNDEF   ,MFEM_UNDEF      ,MFEM_UNDEF,MFEM_UNDEF},
    234:                                         {MFEM_POINT,MFEM_UNDEF,MFEM_SEGMENT,MFEM_TRIANGLE,MFEM_SQUARE     ,MFEM_UNDEF,MFEM_UNDEF},
    235:                                         {MFEM_POINT,MFEM_UNDEF,MFEM_SEGMENT,MFEM_UNDEF   ,MFEM_TETRAHEDRON,MFEM_PRISM,MFEM_CUBE } };

    237: MFEM_cid mfem_table_cid_unint[4][9] = { {MFEM_POINT,MFEM_UNDEF,MFEM_UNDEF  ,MFEM_UNDEF   ,MFEM_UNDEF      ,MFEM_UNDEF,MFEM_PRISM,MFEM_UNDEF,MFEM_UNDEF},
    238:                                         {MFEM_POINT,MFEM_UNDEF,MFEM_SEGMENT,MFEM_UNDEF   ,MFEM_UNDEF      ,MFEM_UNDEF,MFEM_PRISM,MFEM_UNDEF,MFEM_UNDEF},
    239:                                         {MFEM_POINT,MFEM_UNDEF,MFEM_SEGMENT,MFEM_TRIANGLE,MFEM_SQUARE     ,MFEM_UNDEF,MFEM_PRISM,MFEM_UNDEF,MFEM_UNDEF},
    240:                                         {MFEM_POINT,MFEM_UNDEF,MFEM_SEGMENT,MFEM_UNDEF   ,MFEM_TETRAHEDRON,MFEM_UNDEF,MFEM_PRISM,MFEM_UNDEF,MFEM_CUBE } };

    242: static PetscErrorCode DMPlexGetPointMFEMCellID_Internal(DM dm, DMLabel label, PetscInt minl, PetscInt p, PetscInt *mid, PetscInt *cid)
    243: {
    244:   DMLabel        dlabel;
    245:   PetscInt       depth,csize,pdepth,dim;

    249:   DMPlexGetDepthLabel(dm,&dlabel);
    250:   DMLabelGetValue(dlabel,p,&pdepth);
    251:   DMPlexGetConeSize(dm,p,&csize);
    252:   DMPlexGetDepth(dm,&depth);
    253:   DMGetDimension(dm,&dim);
    254:   if (label) {
    255:     DMLabelGetValue(label,p,mid);
    256:     *mid = *mid - minl + 1; /* MFEM does not like negative markers */
    257:   } else *mid = 1;
    258:   if (depth >=0 && dim != depth) { /* not interpolated, it assumes cell-vertex mesh */
    259: #if defined PETSC_USE_DEBUG
    260:     if (dim < 0 || dim > 3) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Dimension %D",dim);
    261:     if (csize > 8) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"Found cone size %D for point %D",csize,p);
    262:     if (depth != 1) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"Found depth %D for point %D. You should interpolate the mesh first",depth,p);
    263: #endif
    264:     *cid = mfem_table_cid_unint[dim][csize];
    265:   } else {
    266: #if defined PETSC_USE_DEBUG
    267:     if (csize > 6) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"Cone size %D for point %D",csize,p);
    268:     if (pdepth < 0 || pdepth > 3) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"Depth %D for point %D",csize,p);
    269: #endif
    270:     *cid = mfem_table_cid[pdepth][csize];
    271:   }
    272:   return(0);
    273: }

    275: static PetscErrorCode DMPlexGetPointMFEMVertexIDs_Internal(DM dm, PetscInt p, PetscSection csec, PetscInt *nv, PetscInt vids[])
    276: {
    277:   PetscInt       dim,sdim,dof = 0,off = 0,i,q,vStart,vEnd,numPoints,*points = NULL;

    281:   DMPlexGetDepthStratum(dm,0,&vStart,&vEnd);
    282:   DMGetDimension(dm,&dim);
    283:   sdim = dim;
    284:   if (csec) {
    285:     PetscInt sStart,sEnd;

    287:     DMGetCoordinateDim(dm,&sdim);
    288:     PetscSectionGetChart(csec,&sStart,&sEnd);
    289:     PetscSectionGetOffset(csec,vStart,&off);
    290:     off  = off/sdim;
    291:     if (p >= sStart && p < sEnd) {
    292:       PetscSectionGetDof(csec,p,&dof);
    293:     }
    294:   }
    295:   if (!dof) {
    296:     DMPlexGetTransitiveClosure(dm,p,PETSC_TRUE,&numPoints,&points);
    297:     for (i=0,q=0;i<numPoints*2;i+= 2)
    298:       if ((points[i] >= vStart) && (points[i] < vEnd))
    299:         vids[q++] = points[i]-vStart+off;
    300:     DMPlexRestoreTransitiveClosure(dm,p,PETSC_TRUE,&numPoints,&points);
    301:   } else {
    302:     PetscSectionGetOffset(csec,p,&off);
    303:     PetscSectionGetDof(csec,p,&dof);
    304:     for (q=0;q<dof/sdim;q++) vids[q] = off/sdim + q;
    305:   }
    306:   *nv = q;
    307:   return(0);
    308: }

    310: /*
    311:    ASCII visualization/dump: full support for simplices and tensor product cells. It supports AMR
    312:    Higher order meshes are also supported
    313: */
    314: static PetscErrorCode DMPlexView_GLVis_ASCII(DM dm, PetscViewer viewer)
    315: {
    316:   DMLabel              label;
    317:   PetscSection         coordSection,parentSection;
    318:   Vec                  coordinates,hovec;
    319:   const PetscScalar    *array;
    320:   PetscInt             bf,p,sdim,dim,depth,novl,minl;
    321:   PetscInt             cStart,cEnd,vStart,vEnd,nvert;
    322:   PetscMPIInt          size;
    323:   PetscBool            localized,isascii;
    324:   PetscBool            enable_mfem,enable_boundary,enable_ncmesh,view_ovl = PETSC_FALSE;
    325:   PetscBT              pown,vown;
    326:   PetscErrorCode       ierr;
    327:   PetscContainer       glvis_container;
    328:   PetscBool            cellvertex = PETSC_FALSE, periodic, enabled = PETSC_TRUE;
    329:   PetscBool            enable_emark,enable_bmark;
    330:   const char           *fmt;
    331:   char                 emark[64] = "",bmark[64] = "";

    336:   PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&isascii);
    337:   if (!isascii) SETERRQ(PetscObjectComm((PetscObject)viewer),PETSC_ERR_SUP,"Viewer must be of type VIEWERASCII");
    338:   MPI_Comm_size(PetscObjectComm((PetscObject)viewer),&size);
    339:   if (size > 1) SETERRQ(PetscObjectComm((PetscObject)viewer),PETSC_ERR_SUP,"Use single sequential viewers for parallel visualization");
    340:   DMGetDimension(dm,&dim);

    342:   /* get container: determines if a process visualizes is portion of the data or not */
    343:   PetscObjectQuery((PetscObject)viewer,"_glvis_info_container",(PetscObject*)&glvis_container);
    344:   if (!glvis_container) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_PLIB,"Missing GLVis container");
    345:   {
    346:     PetscViewerGLVisInfo glvis_info;
    347:     PetscContainerGetPointer(glvis_container,(void**)&glvis_info);
    348:     enabled = glvis_info->enabled;
    349:     fmt     = glvis_info->fmt;
    350:   }

    352:   /* Users can attach a coordinate vector to the DM in case they have a higher-order mesh
    353:      DMPlex does not currently support HO meshes, so there's no API for this */
    354:   PetscObjectQuery((PetscObject)dm,"_glvis_mesh_coords",(PetscObject*)&hovec);

    356:   DMPlexGetHeightStratum(dm,0,&cStart,&cEnd);
    357:   DMPlexGetGhostCellStratum(dm,&p,NULL);
    358:   if (p >= 0) cEnd = p;
    359:   DMPlexGetDepthStratum(dm,0,&vStart,&vEnd);
    360:   DMGetPeriodicity(dm,&periodic,NULL,NULL,NULL);
    361:   DMGetCoordinatesLocalized(dm,&localized);
    362:   if (periodic && !localized && !hovec) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Coordinates need to be localized");
    363:   DMGetCoordinateSection(dm,&coordSection);
    364:   DMGetCoordinateDim(dm,&sdim);
    365:   DMGetCoordinatesLocal(dm,&coordinates);
    366:   if (!coordinates && !hovec) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Missing local coordinates vector");

    368:   /*
    369:      a couple of sections of the mesh specification are disabled
    370:        - boundary: the boundary is not needed for proper mesh visualization unless we want to visualize boundary attributes or we have high-order coordinates in 3D (topologically)
    371:        - vertex_parents: used for non-conforming meshes only when we want to use MFEM as a discretization package
    372:                          and be able to derefine the mesh (MFEM does not currently have to ability to read ncmeshes in parallel)
    373:   */
    374:   enable_boundary = PETSC_FALSE;
    375:   enable_ncmesh   = PETSC_FALSE;
    376:   enable_mfem     = PETSC_FALSE;
    377:   enable_emark    = PETSC_FALSE;
    378:   enable_bmark    = PETSC_FALSE;
    379:   /* I'm tired of problems with negative values in the markers, disable them */
    380:   PetscOptionsBegin(PetscObjectComm((PetscObject)dm),((PetscObject)dm)->prefix,"GLVis PetscViewer DMPlex Options","PetscViewer");
    381:   PetscOptionsBool("-viewer_glvis_dm_plex_enable_boundary","Enable boundary section in mesh representation",NULL,enable_boundary,&enable_boundary,NULL);
    382:   PetscOptionsBool("-viewer_glvis_dm_plex_enable_ncmesh","Enable vertex_parents section in mesh representation (allows derefinement)",NULL,enable_ncmesh,&enable_ncmesh,NULL);
    383:   PetscOptionsBool("-viewer_glvis_dm_plex_enable_mfem","Dump a mesh that can be used with MFEM's FiniteElementSpaces",NULL,enable_mfem,&enable_mfem,NULL);
    384:   PetscOptionsBool("-viewer_glvis_dm_plex_overlap","Include overlap region in local meshes",NULL,view_ovl,&view_ovl,NULL);
    385:   PetscOptionsString("-viewer_glvis_dm_plex_emarker","String for the material id label",NULL,emark,emark,sizeof(emark),&enable_emark);
    386:   PetscOptionsString("-viewer_glvis_dm_plex_bmarker","String for the boundary id label",NULL,bmark,bmark,sizeof(bmark),&enable_bmark);
    387:   PetscOptionsEnd();
    388:   if (enable_bmark) enable_boundary = PETSC_TRUE;

    390:   MPI_Comm_size(PetscObjectComm((PetscObject)dm),&size);
    391:   if (enable_ncmesh && size > 1) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Not supported in parallel");
    392:   DMPlexGetDepth(dm,&depth);
    393:   if (enable_boundary && depth >= 0 && dim != depth) SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Mesh must be interpolated. "
    394:                                                              "Alternatively, run with -viewer_glvis_dm_plex_enable_boundary 0");
    395:   if (enable_ncmesh && depth >= 0 && dim != depth) SETERRQ(PetscObjectComm((PetscObject)dm), PETSC_ERR_ARG_WRONG, "Mesh must be interpolated. "
    396:                                                            "Alternatively, run with -viewer_glvis_dm_plex_enable_ncmesh 0");
    397:   if (depth >=0 && dim != depth) { /* not interpolated, it assumes cell-vertex mesh */
    398:     if (depth != 1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unsupported depth %D. You should interpolate the mesh first",depth);
    399:     cellvertex = PETSC_TRUE;
    400:   }

    402:   /* Identify possible cells in the overlap */
    403:   novl = 0;
    404:   pown = NULL;
    405:   if (size > 1) {
    406:     IS             globalNum = NULL;
    407:     const PetscInt *gNum;
    408:     PetscBool      ovl  = PETSC_FALSE;

    410:     PetscObjectQuery((PetscObject)dm,"_glvis_plex_gnum",(PetscObject*)&globalNum);
    411:     if (!globalNum) {
    412:       if (view_ovl) {
    413:         ISCreateStride(PetscObjectComm((PetscObject)dm),cEnd-cStart,0,1,&globalNum);
    414:       } else {
    415:         DMPlexCreateCellNumbering_Internal(dm,PETSC_TRUE,&globalNum);
    416:       }
    417:       PetscObjectCompose((PetscObject)dm,"_glvis_plex_gnum",(PetscObject)globalNum);
    418:       PetscObjectDereference((PetscObject)globalNum);
    419:     }
    420:     ISGetIndices(globalNum,&gNum);
    421:     for (p=cStart; p<cEnd; p++) {
    422:       if (gNum[p-cStart] < 0) {
    423:         ovl = PETSC_TRUE;
    424:         novl++;
    425:       }
    426:     }
    427:     if (ovl) {
    428:       /* it may happen that pown get not destroyed, if the user closes the window while this function is running.
    429:          TODO: garbage collector? attach pown to dm?  */
    430:       PetscBTCreate(cEnd-cStart,&pown);
    431:       for (p=cStart; p<cEnd; p++) {
    432:         if (gNum[p-cStart] < 0) continue;
    433:         else {
    434:           PetscBTSet(pown,p-cStart);
    435:         }
    436:       }
    437:     }
    438:     ISRestoreIndices(globalNum,&gNum);
    439:   }

    441:   /* return if this process is disabled */
    442:   if (!enabled) {
    443:     PetscViewerASCIIPrintf(viewer,"MFEM mesh v1.1\n");
    444:     PetscViewerASCIIPrintf(viewer,"\ndimension\n");
    445:     PetscViewerASCIIPrintf(viewer,"%D\n",dim);
    446:     PetscViewerASCIIPrintf(viewer,"\nelements\n");
    447:     PetscViewerASCIIPrintf(viewer,"%D\n",0);
    448:     PetscViewerASCIIPrintf(viewer,"\nboundary\n");
    449:     PetscViewerASCIIPrintf(viewer,"%D\n",0);
    450:     PetscViewerASCIIPrintf(viewer,"\nvertices\n");
    451:     PetscViewerASCIIPrintf(viewer,"%D\n",0);
    452:     PetscViewerASCIIPrintf(viewer,"%D\n",sdim);
    453:     PetscBTDestroy(&pown);
    454:     return(0);
    455:   }

    457:   if (enable_mfem) {
    458:     if (periodic && !hovec) { /* we need to generate a vector of L2 coordinates, as this is how MFEM handles periodic meshes */
    459:       PetscInt    vpc = 0;
    460:       char        fec[64];
    461:       PetscInt    vids[8] = {0,1,2,3,4,5,6,7};
    462:       PetscInt    hexv[8] = {0,1,3,2,4,5,7,6}, tetv[4] = {0,1,2,3};
    463:       PetscInt    quadv[8] = {0,1,3,2}, triv[3] = {0,1,2};
    464:       PetscInt    *dof = NULL;
    465:       PetscScalar *array,*ptr;

    467:       PetscSNPrintf(fec,sizeof(fec),"FiniteElementCollection: L2_T1_%DD_P1",dim);
    468:       if (cEnd-cStart) {
    469:         PetscInt fpc;

    471:         DMPlexGetConeSize(dm,cStart,&fpc);
    472:         switch(dim) {
    473:           case 1:
    474:             vpc = 2;
    475:             dof = hexv;
    476:             break;
    477:           case 2:
    478:             switch (fpc) {
    479:               case 3:
    480:                 vpc = 3;
    481:                 dof = triv;
    482:                 break;
    483:               case 4:
    484:                 vpc = 4;
    485:                 dof = quadv;
    486:                 break;
    487:               default:
    488:                 SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unhandled case: faces per cell %D",fpc);
    489:                 break;
    490:             }
    491:             break;
    492:           case 3:
    493:             switch (fpc) {
    494:               case 4: /* TODO: still need to understand L2 ordering for tets */
    495:                 vpc = 4;
    496:                 dof = tetv;
    497:                 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unhandled tethraedral case");
    498:                 break;
    499:               case 6:
    500:                 if (cellvertex) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unhandled case: vertices per cell %D",fpc);
    501:                 vpc = 8;
    502:                 dof = hexv;
    503:                 break;
    504:               case 8:
    505:                 if (!cellvertex) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unhandled case: faces per cell %D",fpc);
    506:                 vpc = 8;
    507:                 dof = hexv;
    508:                 break;
    509:               default:
    510:                 SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unhandled case: faces per cell %D",fpc);
    511:                 break;
    512:             }
    513:             break;
    514:           default:
    515:             SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_SUP,"Unhandled dim");
    516:             break;
    517:         }
    518:         DMPlexReorderCell(dm,cStart,vids);
    519:       }
    520:       if (!dof) SETERRQ(PetscObjectComm((PetscObject)dm),PETSC_ERR_PLIB,"Missing dofs");
    521:       VecCreateSeq(PETSC_COMM_SELF,(cEnd-cStart-novl)*vpc*sdim,&hovec);
    522:       PetscObjectCompose((PetscObject)dm,"_glvis_mesh_coords",(PetscObject)hovec);
    523:       PetscObjectDereference((PetscObject)hovec);
    524:       PetscObjectSetName((PetscObject)hovec,fec);
    525:       VecGetArray(hovec,&array);
    526:       ptr  = array;
    527:       for (p=cStart;p<cEnd;p++) {
    528:         PetscInt    csize,v,d;
    529:         PetscScalar *vals = NULL;

    531:         if (PetscUnlikely(pown && !PetscBTLookup(pown,p-cStart))) continue;
    532:         DMPlexVecGetClosure(dm,coordSection,coordinates,p,&csize,&vals);
    533:         if (csize != vpc*sdim && csize != vpc*sdim*2) SETERRQ3(PETSC_COMM_SELF,PETSC_ERR_SUP,"Unsupported closure size %D (vpc %D, sdim %D)",csize,vpc,sdim);
    534:         for (v=0;v<vpc;v++) {
    535:           for (d=0;d<sdim;d++) {
    536:             ptr[sdim*dof[v]+d] = vals[sdim*vids[v]+d];
    537:           }
    538:         }
    539:         ptr += vpc*sdim;
    540:         DMPlexVecRestoreClosure(dm,coordSection,coordinates,p,&csize,&vals);
    541:       }
    542:       VecRestoreArray(hovec,&array);
    543:     }
    544:   }
    545:   /* if we have high-order coordinates in 3D, we need to specify the boundary */
    546:   if (hovec && dim == 3) enable_boundary = PETSC_TRUE;

    548:   /* header */
    549:   PetscViewerASCIIPrintf(viewer,"MFEM mesh v1.1\n");

    551:   /* topological dimension */
    552:   PetscViewerASCIIPrintf(viewer,"\ndimension\n");
    553:   PetscViewerASCIIPrintf(viewer,"%D\n",dim);

    555:   /* elements */
    556:   minl = 1;
    557:   label = NULL;
    558:   if (enable_emark) {
    559:     PetscInt lminl = PETSC_MAX_INT;

    561:     DMGetLabel(dm,emark,&label);
    562:     if (label) {
    563:       IS       vals;
    564:       PetscInt ldef;

    566:       DMLabelGetDefaultValue(label,&ldef);
    567:       DMLabelGetValueIS(label,&vals);
    568:       ISGetMinMax(vals,&lminl,NULL);
    569:       ISDestroy(&vals);
    570:       lminl = PetscMin(ldef,lminl);
    571:     }
    572:     MPIU_Allreduce(&lminl,&minl,1,MPIU_INT,MPI_MIN,PetscObjectComm((PetscObject)dm));
    573:     if (minl == PETSC_MAX_INT) minl = 1;
    574:   }
    575:   PetscViewerASCIIPrintf(viewer,"\nelements\n");
    576:   PetscViewerASCIIPrintf(viewer,"%D\n",cEnd-cStart-novl);
    577:   for (p=cStart;p<cEnd;p++) {
    578:     PetscInt       vids[8];
    579:     PetscInt       i,nv = 0,cid = -1,mid = 1;

    581:     if (PetscUnlikely(pown && !PetscBTLookup(pown,p-cStart))) continue;
    582:     DMPlexGetPointMFEMCellID_Internal(dm,label,minl,p,&mid,&cid);
    583:     DMPlexGetPointMFEMVertexIDs_Internal(dm,p,(localized && !hovec) ? coordSection : NULL,&nv,vids);
    584:     DMPlexReorderCell(dm,p,vids);
    585:     PetscViewerASCIIPrintf(viewer,"%D %D",mid,cid);
    586:     for (i=0;i<nv;i++) {
    587:       PetscViewerASCIIPrintf(viewer," %D",vids[i]);
    588:     }
    589:     PetscViewerASCIIPrintf(viewer,"\n");
    590:   }

    592:   /* boundary */
    593:   PetscViewerASCIIPrintf(viewer,"\nboundary\n");
    594:   if (!enable_boundary) {
    595:     PetscViewerASCIIPrintf(viewer,"%D\n",0);
    596:   } else {
    597:     DMLabel  perLabel;
    598:     PetscBT  bfaces;
    599:     PetscInt fStart,fEnd,*fcells;

    601:     DMPlexGetHeightStratum(dm,1,&fStart,&fEnd);
    602:     PetscBTCreate(fEnd-fStart,&bfaces);
    603:     DMPlexGetMaxSizes(dm,NULL,&p);
    604:     PetscMalloc1(p,&fcells);
    605:     DMGetLabel(dm,"glvis_periodic_cut",&perLabel);
    606:     if (!perLabel && localized) { /* this periodic cut can be moved up to DMPlex setup */
    607:       DMCreateLabel(dm,"glvis_periodic_cut");
    608:       DMGetLabel(dm,"glvis_periodic_cut",&perLabel);
    609:       DMLabelSetDefaultValue(perLabel,1);
    610:       for (p=cStart;p<cEnd;p++) {
    611:         DMPolytopeType cellType;
    612:         PetscInt       dof;

    614:         DMPlexGetCellType(dm,p,&cellType);
    615:         PetscSectionGetDof(coordSection,p,&dof);
    616:         if (dof) {
    617:           PetscInt    uvpc, v,csize,cellClosureSize,*cellClosure = NULL,*vidxs = NULL;
    618:           PetscScalar *vals = NULL;

    620:           uvpc = DMPolytopeTypeGetNumVertices(cellType);
    621:           if (dof%sdim) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_USER,"Incompatible number of cell dofs %D and space dimension %D",dof,sdim);
    622:           if (dof/sdim != uvpc) SETERRQ3(PETSC_COMM_SELF,PETSC_ERR_SUP,"Incompatible number of cell dofs %D, vertices %D and space dim %D",dof/sdim,uvpc,sdim);
    623:           DMPlexVecGetClosure(dm,coordSection,coordinates,p,&csize,&vals);
    624:           DMPlexGetTransitiveClosure(dm,p,PETSC_TRUE,&cellClosureSize,&cellClosure);
    625:           for (v=0;v<cellClosureSize;v++)
    626:             if (cellClosure[2*v] >= vStart && cellClosure[2*v] < vEnd) {
    627:               vidxs = cellClosure + 2*v;
    628:               break;
    629:             }
    630:           if (!vidxs) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Missing vertices");
    631:           for (v=0;v<uvpc;v++) {
    632:             PetscInt s;

    634:             for (s=0;s<sdim;s++) {
    635:               if (PetscAbsScalar(vals[v*sdim+s]-vals[v*sdim+s+uvpc*sdim])>PETSC_MACHINE_EPSILON) {
    636:                 DMLabelSetValue(perLabel,vidxs[2*v],2);
    637:               }
    638:             }
    639:           }
    640:           DMPlexRestoreTransitiveClosure(dm,p,PETSC_TRUE,&cellClosureSize,&cellClosure);
    641:           DMPlexVecRestoreClosure(dm,coordSection,coordinates,p,&csize,&vals);
    642:         }
    643:       }
    644:       if (dim > 1) {
    645:         PetscInt eEnd,eStart;

    647:         DMPlexGetDepthStratum(dm,1,&eStart,&eEnd);
    648:         for (p=eStart;p<eEnd;p++) {
    649:           const PetscInt *cone;
    650:           PetscInt       coneSize,i;
    651:           PetscBool      ispe = PETSC_TRUE;

    653:           DMPlexGetCone(dm,p,&cone);
    654:           DMPlexGetConeSize(dm,p,&coneSize);
    655:           for (i=0;i<coneSize;i++) {
    656:             PetscInt v;

    658:             DMLabelGetValue(perLabel,cone[i],&v);
    659:             ispe = (PetscBool)(ispe && (v==2));
    660:           }
    661:           if (ispe && coneSize) {
    662:             PetscInt       ch, numChildren;
    663:             const PetscInt *children;

    665:             DMLabelSetValue(perLabel,p,2);
    666:             DMPlexGetTreeChildren(dm,p,&numChildren,&children);
    667:             for (ch = 0; ch < numChildren; ch++) {
    668:               DMLabelSetValue(perLabel,children[ch],2);
    669:             }
    670:           }
    671:         }
    672:         if (dim > 2) {
    673:           for (p=fStart;p<fEnd;p++) {
    674:             const PetscInt *cone;
    675:             PetscInt       coneSize,i;
    676:             PetscBool      ispe = PETSC_TRUE;

    678:             DMPlexGetCone(dm,p,&cone);
    679:             DMPlexGetConeSize(dm,p,&coneSize);
    680:             for (i=0;i<coneSize;i++) {
    681:               PetscInt v;

    683:               DMLabelGetValue(perLabel,cone[i],&v);
    684:               ispe = (PetscBool)(ispe && (v==2));
    685:             }
    686:             if (ispe && coneSize) {
    687:               PetscInt       ch, numChildren;
    688:               const PetscInt *children;

    690:               DMLabelSetValue(perLabel,p,2);
    691:               DMPlexGetTreeChildren(dm,p,&numChildren,&children);
    692:               for (ch = 0; ch < numChildren; ch++) {
    693:                 DMLabelSetValue(perLabel,children[ch],2);
    694:               }
    695:             }
    696:           }
    697:         }
    698:       }
    699:     }
    700:     for (p=fStart;p<fEnd;p++) {
    701:       const PetscInt *support;
    702:       PetscInt       supportSize;
    703:       PetscBool      isbf = PETSC_FALSE;

    705:       DMPlexGetSupportSize(dm,p,&supportSize);
    706:       if (pown) {
    707:         PetscBool has_owned = PETSC_FALSE, has_ghost = PETSC_FALSE;
    708:         PetscInt  i;

    710:         DMPlexGetSupport(dm,p,&support);
    711:         for (i=0;i<supportSize;i++) {
    712:           if (PetscLikely(PetscBTLookup(pown,support[i]-cStart))) has_owned = PETSC_TRUE;
    713:           else has_ghost = PETSC_TRUE;
    714:         }
    715:         isbf = (PetscBool)((supportSize == 1 && has_owned) || (supportSize > 1 && has_owned && has_ghost));
    716:       } else {
    717:         isbf = (PetscBool)(supportSize == 1);
    718:       }
    719:       if (!isbf && perLabel) {
    720:         const PetscInt *cone;
    721:         PetscInt       coneSize,i;

    723:         DMPlexGetCone(dm,p,&cone);
    724:         DMPlexGetConeSize(dm,p,&coneSize);
    725:         isbf = PETSC_TRUE;
    726:         for (i=0;i<coneSize;i++) {
    727:           PetscInt v,d;

    729:           DMLabelGetValue(perLabel,cone[i],&v);
    730:           DMLabelGetDefaultValue(perLabel,&d);
    731:           isbf = (PetscBool)(isbf && v != d);
    732:         }
    733:       }
    734:       if (isbf) {
    735:         PetscBTSet(bfaces,p-fStart);
    736:       }
    737:     }
    738:     /* count boundary faces */
    739:     for (p=fStart,bf=0;p<fEnd;p++) {
    740:       if (PetscUnlikely(PetscBTLookup(bfaces,p-fStart))) {
    741:         const PetscInt *support;
    742:         PetscInt       supportSize,c;

    744:         DMPlexGetSupportSize(dm,p,&supportSize);
    745:         DMPlexGetSupport(dm,p,&support);
    746:         for (c=0;c<supportSize;c++) {
    747:           const    PetscInt *cone;
    748:           PetscInt cell,cl,coneSize;

    750:           cell = support[c];
    751:           if (pown && PetscUnlikely(!PetscBTLookup(pown,cell-cStart))) continue;
    752:           DMPlexGetCone(dm,cell,&cone);
    753:           DMPlexGetConeSize(dm,cell,&coneSize);
    754:           for (cl=0;cl<coneSize;cl++) {
    755:             if (cone[cl] == p) {
    756:               bf += 1;
    757:               break;
    758:             }
    759:           }
    760:         }
    761:       }
    762:     }
    763:     minl = 1;
    764:     label = NULL;
    765:     if (enable_bmark) {
    766:       PetscInt lminl = PETSC_MAX_INT;

    768:       DMGetLabel(dm,bmark,&label);
    769:       if (label) {
    770:         IS       vals;
    771:         PetscInt ldef;

    773:         DMLabelGetDefaultValue(label,&ldef);
    774:         DMLabelGetValueIS(label,&vals);
    775:         ISGetMinMax(vals,&lminl,NULL);
    776:         ISDestroy(&vals);
    777:         lminl = PetscMin(ldef,lminl);
    778:       }
    779:       MPIU_Allreduce(&lminl,&minl,1,MPIU_INT,MPI_MIN,PetscObjectComm((PetscObject)dm));
    780:       if (minl == PETSC_MAX_INT) minl = 1;
    781:     }
    782:     PetscViewerASCIIPrintf(viewer,"%D\n",bf);
    783:     for (p=fStart;p<fEnd;p++) {
    784:       if (PetscUnlikely(PetscBTLookup(bfaces,p-fStart))) {
    785:         const PetscInt *support;
    786:         PetscInt       supportSize,c,nc = 0;

    788:         DMPlexGetSupportSize(dm,p,&supportSize);
    789:         DMPlexGetSupport(dm,p,&support);
    790:         if (pown) {
    791:           for (c=0;c<supportSize;c++) {
    792:             if (PetscLikely(PetscBTLookup(pown,support[c]-cStart))) {
    793:               fcells[nc++] = support[c];
    794:             }
    795:           }
    796:         } else for (c=0;c<supportSize;c++) fcells[nc++] = support[c];
    797:         for (c=0;c<nc;c++) {
    798:           const DMPolytopeType *faceTypes;
    799:           DMPolytopeType       cellType;
    800:           const PetscInt       *faceSizes,*cone;
    801:           PetscInt             vids[8],*faces,st,i,coneSize,cell,cl,nv,cid = -1,mid = -1;

    803:           cell = fcells[c];
    804:           DMPlexGetCone(dm,cell,&cone);
    805:           DMPlexGetConeSize(dm,cell,&coneSize);
    806:           for (cl=0;cl<coneSize;cl++)
    807:             if (cone[cl] == p)
    808:               break;
    809:           if (cl == coneSize) continue;

    811:           /* face material id and type */
    812:           DMPlexGetPointMFEMCellID_Internal(dm,label,minl,p,&mid,&cid);
    813:           PetscViewerASCIIPrintf(viewer,"%D %D",mid,cid);
    814:           /* vertex ids */
    815:           DMPlexGetCellType(dm,cell,&cellType);
    816:           DMPlexGetPointMFEMVertexIDs_Internal(dm,cell,(localized && !hovec) ? coordSection : NULL,&nv,vids);
    817:           DMPlexGetRawFaces_Internal(dm,cellType,vids,NULL,&faceTypes,&faceSizes,(const PetscInt**)&faces);
    818:           st = 0;
    819:           for (i=0;i<cl;i++) st += faceSizes[i];
    820:           DMPlexInvertCell(faceTypes[cl],faces + st);
    821:           for (i=0;i<faceSizes[cl];i++) {
    822:             PetscViewerASCIIPrintf(viewer," %d",faces[st+i]);
    823:           }
    824:           PetscViewerASCIIPrintf(viewer,"\n");
    825:           DMPlexRestoreRawFaces_Internal(dm,cellType,vids,NULL,&faceTypes,&faceSizes,(const PetscInt**)&faces);
    826:           bf -= 1;
    827:         }
    828:       }
    829:     }
    830:     if (bf) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Remaining boundary faces %D",bf);
    831:     PetscBTDestroy(&bfaces);
    832:     PetscFree(fcells);
    833:   }

    835:   /* mark owned vertices */
    836:   vown = NULL;
    837:   if (pown) {
    838:     PetscBTCreate(vEnd-vStart,&vown);
    839:     for (p=cStart;p<cEnd;p++) {
    840:       PetscInt i,closureSize,*closure = NULL;

    842:       if (PetscUnlikely(!PetscBTLookup(pown,p-cStart))) continue;
    843:       DMPlexGetTransitiveClosure(dm,p,PETSC_TRUE,&closureSize,&closure);
    844:       for (i=0;i<closureSize;i++) {
    845:         const PetscInt pp = closure[2*i];

    847:         if (pp >= vStart && pp < vEnd) {
    848:           PetscBTSet(vown,pp-vStart);
    849:         }
    850:       }
    851:       DMPlexRestoreTransitiveClosure(dm,p,PETSC_TRUE,&closureSize,&closure);
    852:     }
    853:   }

    855:   /* vertex_parents (Non-conforming meshes) */
    856:   parentSection  = NULL;
    857:   if (enable_ncmesh) {
    858:     DMPlexGetTree(dm,&parentSection,NULL,NULL,NULL,NULL);
    859:   }
    860:   if (parentSection) {
    861:     PetscInt vp,gvp;

    863:     for (vp=0,p=vStart;p<vEnd;p++) {
    864:       DMLabel  dlabel;
    865:       PetscInt parent,depth;

    867:       if (PetscUnlikely(vown && !PetscBTLookup(vown,p-vStart))) continue;
    868:       DMPlexGetDepthLabel(dm,&dlabel);
    869:       DMLabelGetValue(dlabel,p,&depth);
    870:       DMPlexGetTreeParent(dm,p,&parent,NULL);
    871:       if (parent != p) vp++;
    872:     }
    873:     MPIU_Allreduce(&vp,&gvp,1,MPIU_INT,MPI_SUM,PetscObjectComm((PetscObject)dm));
    874:     if (gvp) {
    875:       PetscInt  maxsupp;
    876:       PetscBool *skip = NULL;

    878:       PetscViewerASCIIPrintf(viewer,"\nvertex_parents\n");
    879:       PetscViewerASCIIPrintf(viewer,"%D\n",vp);
    880:       DMPlexGetMaxSizes(dm,NULL,&maxsupp);
    881:       PetscMalloc1(maxsupp,&skip);
    882:       for (p=vStart;p<vEnd;p++) {
    883:         DMLabel  dlabel;
    884:         PetscInt parent;

    886:         if (PetscUnlikely(vown && !PetscBTLookup(vown,p-vStart))) continue;
    887:         DMPlexGetDepthLabel(dm,&dlabel);
    888:         DMPlexGetTreeParent(dm,p,&parent,NULL);
    889:         if (parent != p) {
    890:           PetscInt       vids[8] = { -1, -1, -1, -1, -1, -1, -1, -1 }; /* silent overzealous clang static analyzer */
    891:           PetscInt       i,nv,ssize,n,numChildren,depth = -1;
    892:           const PetscInt *children;

    894:           DMPlexGetConeSize(dm,parent,&ssize);
    895:           switch (ssize) {
    896:             case 2: /* edge */
    897:               nv   = 0;
    898:               DMPlexGetPointMFEMVertexIDs_Internal(dm,parent,localized ? coordSection : NULL,&nv,vids);
    899:               PetscViewerASCIIPrintf(viewer,"%D",p-vStart);
    900:               for (i=0;i<nv;i++) {
    901:                 PetscViewerASCIIPrintf(viewer," %D",vids[i]);
    902:               }
    903:               PetscViewerASCIIPrintf(viewer,"\n");
    904:               vp--;
    905:               break;
    906:             case 4: /* face */
    907:               DMPlexGetTreeChildren(dm,parent,&numChildren,&children);
    908:               for (n=0;n<numChildren;n++) {
    909:                 DMLabelGetValue(dlabel,children[n],&depth);
    910:                 if (!depth) {
    911:                   const PetscInt *hvsupp,*hesupp,*cone;
    912:                   PetscInt       hvsuppSize,hesuppSize,coneSize;
    913:                   PetscInt       hv = children[n],he = -1,f;

    915:                   PetscArrayzero(skip,maxsupp);
    916:                   DMPlexGetSupportSize(dm,hv,&hvsuppSize);
    917:                   DMPlexGetSupport(dm,hv,&hvsupp);
    918:                   for (i=0;i<hvsuppSize;i++) {
    919:                     PetscInt ep;
    920:                     DMPlexGetTreeParent(dm,hvsupp[i],&ep,NULL);
    921:                     if (ep != hvsupp[i]) {
    922:                       he = hvsupp[i];
    923:                     } else {
    924:                       skip[i] = PETSC_TRUE;
    925:                     }
    926:                   }
    927:                   if (he == -1) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_SUP,"Vertex %D support size %D: hanging edge not found",hv,hvsuppSize);
    928:                   DMPlexGetCone(dm,he,&cone);
    929:                   vids[0] = (cone[0] == hv) ? cone[1] : cone[0];
    930:                   DMPlexGetSupportSize(dm,he,&hesuppSize);
    931:                   DMPlexGetSupport(dm,he,&hesupp);
    932:                   for (f=0;f<hesuppSize;f++) {
    933:                     PetscInt j;

    935:                     DMPlexGetCone(dm,hesupp[f],&cone);
    936:                     DMPlexGetConeSize(dm,hesupp[f],&coneSize);
    937:                     for (j=0;j<coneSize;j++) {
    938:                       PetscInt k;
    939:                       for (k=0;k<hvsuppSize;k++) {
    940:                         if (hvsupp[k] == cone[j]) {
    941:                           skip[k] = PETSC_TRUE;
    942:                           break;
    943:                         }
    944:                       }
    945:                     }
    946:                   }
    947:                   for (i=0;i<hvsuppSize;i++) {
    948:                     if (!skip[i]) {
    949:                       DMPlexGetCone(dm,hvsupp[i],&cone);
    950:                       vids[1] = (cone[0] == hv) ? cone[1] : cone[0];
    951:                     }
    952:                   }
    953:                   PetscViewerASCIIPrintf(viewer,"%D",hv-vStart);
    954:                   for (i=0;i<2;i++) {
    955:                     PetscViewerASCIIPrintf(viewer," %D",vids[i]-vStart);
    956:                   }
    957:                   PetscViewerASCIIPrintf(viewer,"\n");
    958:                   vp--;
    959:                 }
    960:               }
    961:               break;
    962:             default:
    963:               SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP,"Don't know how to deal with support size %D",ssize);
    964:           }
    965:         }
    966:       }
    967:       PetscFree(skip);
    968:     }
    969:     if (vp) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Unexpected %D hanging vertices",vp);
    970:   }
    971:   PetscBTDestroy(&pown);
    972:   PetscBTDestroy(&vown);

    974:   /* vertices */
    975:   if (hovec) { /* higher-order meshes */
    976:     const char *fec;
    977:     PetscInt   i,n,s;

    979:     PetscViewerASCIIPrintf(viewer,"\nvertices\n");
    980:     PetscViewerASCIIPrintf(viewer,"%D\n",vEnd-vStart);
    981:     PetscViewerASCIIPrintf(viewer,"nodes\n");
    982:     PetscObjectGetName((PetscObject)hovec,&fec);
    983:     PetscViewerASCIIPrintf(viewer,"FiniteElementSpace\n");
    984:     PetscViewerASCIIPrintf(viewer,"%s\n",fec);
    985:     PetscViewerASCIIPrintf(viewer,"VDim: %D\n",sdim);
    986:     PetscViewerASCIIPrintf(viewer,"Ordering: 1\n\n"); /*Ordering::byVDIM*/
    987:     VecGetArrayRead(hovec,&array);
    988:     VecGetLocalSize(hovec,&n);
    989:     if (n%sdim) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_USER,"Size of local coordinate vector %D incompatible with space dimension %D",n,sdim);
    990:     for (i=0;i<n/sdim;i++) {
    991:       for (s=0;s<sdim;s++) {
    992:         PetscViewerASCIIPrintf(viewer,fmt,PetscRealPart(array[i*sdim+s]));
    993:       }
    994:       PetscViewerASCIIPrintf(viewer,"\n");
    995:     }
    996:     VecRestoreArrayRead(hovec,&array);
    997:   } else {
    998:     VecGetLocalSize(coordinates,&nvert);
    999:     PetscViewerASCIIPrintf(viewer,"\nvertices\n");
    1000:     PetscViewerASCIIPrintf(viewer,"%D\n",nvert/sdim);
    1001:     PetscViewerASCIIPrintf(viewer,"%D\n",sdim);
    1002:     VecGetArrayRead(coordinates,&array);
    1003:     for (p=0;p<nvert/sdim;p++) {
    1004:       PetscInt s;
    1005:       for (s=0;s<sdim;s++) {
    1006:         PetscReal v = PetscRealPart(array[p*sdim+s]);

    1008:         PetscViewerASCIIPrintf(viewer,fmt,PetscIsInfOrNanReal(v) ? 0.0 : v);
    1009:       }
    1010:       PetscViewerASCIIPrintf(viewer,"\n");
    1011:     }
    1012:     VecRestoreArrayRead(coordinates,&array);
    1013:   }
    1014:   return(0);
    1015: }

    1017: PetscErrorCode DMPlexView_GLVis(DM dm, PetscViewer viewer)
    1018: {
    1021:   DMView_GLVis(dm,viewer,DMPlexView_GLVis_ASCII);
    1022:   return(0);
    1023: }