#if !defined(_PETSCDMTYPES_H)
#define _PETSCDMTYPES_H
/*S
DM - Abstract PETSc object that manages an abstract grid object and its interactions with the algebraic solvers
Level: intermediate
Concepts: grids, grid refinement
Notes:
The DMDACreate() based object and the DMCompositeCreate() based object are examples of DMs
.seealso: DMCompositeCreate(), DMDACreate(), DMSetType(), DMType
S*/
typedef struct _p_DM* DM;
/*E
DMBoundaryType - Describes the choice for fill of ghost cells on physical domain boundaries.
Level: beginner
A boundary may be of type DM_BOUNDARY_NONE (no ghost nodes), DM_BOUNDARY_GHOSTED (ghost vertices/cells
exist but aren't filled; you can put values into them and then apply a stencil that uses those ghost locations),
DM_BOUNDARY_MIRROR (the ghost value is the same as the value 1 grid point in; that is, the 0th grid point in the real mesh acts like a mirror to define the ghost point value;
not yet implemented for 3d), DM_BOUNDARY_PERIODIC (ghost vertices/cells filled by the opposite
edge of the domain), or DM_BOUNDARY_TWIST (like periodic, only glued backwards like a Mobius strip).
Notes:
This is information for the boundary of the __PHYSICAL__ domain. It has nothing to do with boundaries between
processes. That width is always determined by the stencil width; see DMDASetStencilWidth().
If the physical grid points have values 0 1 2 3 with DM_BOUNDARY_MIRROR then the local vector with ghost points has the values 1 0 1 2 3 2 .
Developer Notes:
Should DM_BOUNDARY_MIRROR have the same meaning with DMDA_Q0, that is a staggered grid? In that case should the ghost point have the same value
as the 0th grid point where the physical boundary serves as the mirror?
References:
http://scicomp.stackexchange.com/questions/5355/writing-the-poisson-equation-finite-difference-matrix-with-neumann-boundary-cond
.seealso: DMDASetBoundaryType(), DMDACreate1d(), DMDACreate2d(), DMDACreate3d(), DMDACreate()
E*/
typedef enum {DM_BOUNDARY_NONE, DM_BOUNDARY_GHOSTED, DM_BOUNDARY_MIRROR, DM_BOUNDARY_PERIODIC, DM_BOUNDARY_TWIST} DMBoundaryType;
/*E
DMBoundaryConditionType - indicates what type of boundary condition is to be imposed
Note: This flag indicates the type of function which will define the condition:
$ DM_BC_ESSENTIAL - A Dirichlet condition using a function of the coordinates
$ DM_BC_ESSENTIAL_FIELD - A Dirichlet condition using a function of the coordinates and auxiliary field data
$ DM_BC_NATURAL - A Neumann condition using a function of the coordinates
$ DM_BC_NATURAL_FIELD - A Dirichlet condition using a function of the coordinates and auxiliary field data
$ DM_BC_NATURAL_RIEMANN - A flux condition which determines the state in ghost cells
The user can check whether a boundary condition is essential using (type & DM_BC_ESSENTIAL), and similarly for
natural conditions (type & DM_BC_NATURAL)
Level: beginner
.seealso: DMAddBoundary(), DMGetBoundary()
E*/
typedef enum {DM_BC_ESSENTIAL = 1, DM_BC_ESSENTIAL_FIELD = 5, DM_BC_NATURAL = 2, DM_BC_NATURAL_FIELD = 6, DM_BC_NATURAL_RIEMANN = 10} DMBoundaryConditionType;
/*E
DMPointLocationType - Describes the method to handle point location failure
Level: beginner
If a search using DM_POINTLOCATION_NONE fails, the failure is signaled with a negative cell number. On the
other hand, if DM_POINTLOCATION_NEAREST is used, on failure, the (approximate) nearest point in the mesh is
used, replacing the given point in the input vector. DM_POINTLOCATION_REMOVE returns values only for points
which were located.
.seealso: DMLocatePoints()
E*/
typedef enum {DM_POINTLOCATION_NONE, DM_POINTLOCATION_NEAREST, DM_POINTLOCATION_REMOVE} DMPointLocationType;
/*E
DMAdaptationStrategy - Describes the strategy used for adaptive solves
Level: beginner
DM_ADAPTATION_INITIAL will refine a mesh based on an initial guess. DM_ADAPTATION_SEQUENTIAL will refine the
mesh based on a sequence of solves, much like grid sequencing. DM_ADAPTATION_MULTILEVEL will use the sequence
of constructed meshes in a multilevel solve, much like the Systematic Upscaling of Brandt.
.seealso: DMAdaptorSolve()
E*/
typedef enum {DM_ADAPTATION_INITIAL, DM_ADAPTATION_SEQUENTIAL, DM_ADAPTATION_MULTILEVEL} DMAdaptationStrategy;
/*E
DMAdaptationCriterion - Describes the test used to decide whether to coarsen or refine parts of the mesh
Level: beginner
DM_ADAPTATION_REFINE will uniformly refine a mesh, much like grid sequencing. DM_ADAPTATION_LABEL will adapt
the mesh based upon a label of the cells filled with DMAdaptFlag markers. DM_ADAPTATION_METRIC will try to
mesh the manifold described by the input metric tensor uniformly. PETSc can also construct such a metric based
upon an input primal or a gradient field.
.seealso: DMAdaptorSolve()
E*/
typedef enum {DM_ADAPTATION_NONE, DM_ADAPTATION_REFINE, DM_ADAPTATION_LABEL, DM_ADAPTATION_METRIC} DMAdaptationCriterion;
/*E
DMAdaptFlag - Marker in the label prescribing adaptation
Level: beginner
.seealso: DMAdaptLabel()
E*/
typedef enum {DM_ADAPT_DETERMINE = PETSC_DETERMINE, DM_ADAPT_KEEP = 0, DM_ADAPT_REFINE, DM_ADAPT_COARSEN, DM_ADAPT_COARSEN_LAST, DM_ADAPT_RESERVED_COUNT} DMAdaptFlag;
/*S
PetscPartitioner - PETSc object that manages a graph partitioner
Level: intermediate
Concepts: partition, mesh
.seealso: PetscPartitionerCreate(), PetscPartitionerSetType(), PetscPartitionerType
S*/
typedef struct _p_PetscPartitioner *PetscPartitioner;
/*E
PetscUnit - The seven fundamental SI units
Level: beginner
.seealso: DMPlexGetScale(), DMPlexSetScale()
E*/
typedef enum {PETSC_UNIT_LENGTH, PETSC_UNIT_MASS, PETSC_UNIT_TIME, PETSC_UNIT_CURRENT, PETSC_UNIT_TEMPERATURE, PETSC_UNIT_AMOUNT, PETSC_UNIT_LUMINOSITY, NUM_PETSC_UNITS} PetscUnit;
/*S
DMField - PETSc object for defining a field on a mesh topology
Level: intermediate
S*/
typedef struct _p_DMField* DMField;
#endif