Fix DMGetNeighbors_DMPlex when overlap == 0

Merge remote-tracking branch 'origin/maint'

Merge branch 'dalcinl/fix-dmplex-invcell/maint' into 'maint'

DMPlex: Fix DMPlexInvertCell_Internal()

See merge request petsc/petsc!2676

DMPlex: Fix DMPlexInvertCell_Internal()

* Handling of triangular prisms was wrong
* Reuse DMPlexInvertCell() to avoid duplicated logic

Merge branch 'knepley/feature-dm-boundary-function-projection' into 'master'

DM: Added DMProjectBdFieldLabelLocal()

See merge request petsc/petsc!2667

DM: Added DMProjectBdFieldLabelLocal()
- Called from DMPlexInsertBoundaryValuesEssentialBdFIeld()
- Added projectbdfieldlabelLocal() to DM
- Added Plex impl
- Added more documentation of the InsertBo

DM: Added DMProjectBdFieldLabelLocal()
- Called from DMPlexInsertBoundaryValuesEssentialBdFIeld()
- Added projectbdfieldlabelLocal() to DM
- Added Plex impl
- Added more documentation of the InsertBoundaryValues*() methods

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Merge branch 'maint'

Merge branch 'patch-1' into 'maint'

Input check for DMPlexCreateFromCellList()

See merge request petsc/petsc!2664

Update plexcreate.c

Merge branch 'knepley/feature-dm-remove-hybrid' into 'master'

Knepley/feature dm remove hybrid

See merge request petsc/petsc!2614

DMPlex: Fixed cell reordering and namespaced cell type names
- Namespaced DMPlexCellRefinerType enum items
- Added DMPlexReorderCell() and refactored DMPlexInvertCell()
- Update Gmsh reader to han

DMPlex: Fixed cell reordering and namespaced cell type names
- Namespaced DMPlexCellRefinerType enum items
- Added DMPlexReorderCell() and refactored DMPlexInvertCell()
- Update Gmsh reader to handle tet+tri-prism meshes

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DM+Plex: Removed the idea of hybrid and ghost cells, in favor of cell type
- Improved Plex tests to work for other cell types
- Plex creation, interpolation, submesh, and refinement routines now set

DM+Plex: Removed the idea of hybrid and ghost cells, in favor of cell type
- Improved Plex tests to work for other cell types
- Plex creation, interpolation, submesh, and refinement routines now set the cell type
- Distribution sorts strata by cell type
- Fixed orientation of prisms from input formats
- Added Plex ex40 to test regular refinement
- CellRefiner is a PetscObject
- dm_plex_cell_refiner chooses the refinement strategy
- Removed SimplexToTensor stuff in favor of ToHex refiner
- Most functions take DMPolytopeType instead of CellRefiner
- CellRefinerInCellTest_Internal()
- CellRefinerGetAffineTransforms_Internal()
- CellRefinerGetAffineFaceTransforms_Internal()
- DMForest now responds to DMPlexGetOverlap() and propagates its overlap to the underlying Plex
- Use DMPlexComputeCellType_Internal() to classify a cell based only on topology
- Added DMPlexGetSimplexOrBoxCells() to replace DMPlexGetInteriorCellStratum()
- Added DM_POLYTOPE_POINT_PRISM_TENSOR
- Added DMPolytopTypeGetDim() and DMPolyTopeTypeGetConeSize()
- Added DMLabelSetStratumBounds()
- Added DMPlexSetCellType()
- Added celltypes to DMView()
- Added DMPolytopeTypeGetNumVertices()
- Added DMPlexCreateReferenceCellByType()
- Added DMPolytopeTypeFromGmsh()
- Made DMPlexRefineUniform() public

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Merge remote-tracking branch 'origin/maint'

Merge branch 'knepley/feature-dm-cell-types' into 'master'

Knepley/feature dm cell types

See merge request petsc/petsc!2446

Merge branch 'jed/dmplexcreateboxmesh-docs/maint' into 'maint'

DMPlexCreateBoxMesh: document -dm_plex_box_faces

See merge request petsc/petsc!2455

DMPlexCreateBoxMesh: document -dm_plex_box_faces

Commit-type: documentation
Reported-by: James Wright <jrwrigh.iii@gmail.com>

DM+Plex: Now classify cells by polytope type
- Defined the polytope type of a cell. added names and special shortcut
pointer like depth - Fixed DMLabelMakeValid() to optimize for contiguous
runs of

DM+Plex: Now classify cells by polytope type
- Defined the polytope type of a cell. added names and special shortcut
pointer like depth - Fixed DMLabelMakeValid() to optimize for contiguous
runs of points - Added cell polytope type label to DM - This needs
special processing, like depth - Added DMPlexGetPointDepth(),
DMPlexGetCellType(), DMPlexGetCellTypeLabel() - DMPlexComputeCellTypes()
infers the cell type for all points using dim/depth/coneSize/ghostCells
- DMPlexGetRawFace(Hybrid)_Internal() now takes the cell type. This
means we can unify the functions later. - Replaced switch(dim/coneSize)
constructs with cell type

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Merge branch 'patch-1' into 'master'

Plex: Fix doc for DMPlexCreateCubeBoundary()

See merge request petsc/petsc!2439

Plex: Fix doc for DMPlexCreateCubeBoundary()
Contributed-by: Klaus Zimmermann <klaus.zimmermann@smhi.se>

Merge branch 'haplav/feature-dmload-events' into 'master'

register DMPLEX_Create* events in DMInitializePackage()

See merge request petsc/petsc!2397

register DMPLEX_Create* events in DMInitializePackage()

Merge branch 'haplav/feature-dmload-events' into 'master'

Add some new events related to DMPlexCreateFromFile.

See merge request petsc/petsc!2391

Add some new events related to DMPlexCreateFromFile.

* DMPlexCreateFromFile
* DMPlexCreateFromCellList
* DMLoad
* ISLoad

Merge branch 'knepley/feature-dm-monitor' into 'master'

Knepley/feature dm monitor

See merge request petsc/petsc!2369

DM: Added monitors - Added DMMonitorSet(), DMMonitorCancel(), DMMonitorSetFromOptions(), DMMonitor() - Added DMPlexMonitorThroughput() and -dm_plex_monitor_throughput - SNES calls DMMonitor()