De-refinement operator using an error threshold. More...

#include <mesh_operators.hpp>

Inheritance diagram for mfem::ThresholdDerefiner:

Collaboration diagram for mfem::ThresholdDerefiner:

Public Member Functions
	ThresholdDerefiner (ErrorEstimator &est)
	Construct a ThresholdDerefiner using the given ErrorEstimator. More...

void	SetThreshold (double thresh)
	Set the de-refinement threshold. The default value is zero. More...

void	SetOp (int op)

void	SetNCLimit (int nc_limit)
	Set the maximum ratio of refinement levels of adjacent elements (0 = unlimited). More...

virtual void	Reset ()
	Reset the associated estimator. More...

Public Member Functions inherited from mfem::MeshOperator
bool	Apply (Mesh &mesh)
	Perform the mesh operation. More...

bool	Stop () const
	Check if STOP action is requested, e.g. stopping criterion is satisfied. More...

bool	Repeat () const
	Check if REPEAT action is requested, i.e. FiniteElementSpaces and GridFunctions need to be updated, and Apply() must be called again. More...

bool	Continue () const
	Check if CONTINUE action is requested, i.e. FiniteElementSpaces and GridFunctions need to be updated and computations should continue. More...

bool	Refined () const
	Check if the mesh was refined. More...

bool	Derefined () const
	Check if the mesh was de-refined. More...

bool	Rebalanced () const
	Check if the mesh was rebalanced. More...

int	GetActionInfo () const
	Get the full ActionInfo value generated by the last call to Apply(). More...

virtual	~MeshOperator ()
	The destructor is virtual. More...

Protected Member Functions
virtual int	ApplyImpl (Mesh &mesh)
	Apply the operator to the mesh. More...

Protected Member Functions inherited from mfem::MeshOperator
	MeshOperator ()
	Constructor to be used by derived classes. More...

Protected Attributes
ErrorEstimator &	estimator

double	threshold

int	nc_limit

int	op

Additional Inherited Members
Public Types inherited from mfem::MeshOperator
enum	Action { NONE = 0, CONTINUE = 1, STOP = 2, REPEAT = 3, MASK_UPDATE = 1, MASK_ACTION = 3 }
	Action and information constants and masks. More...

enum	Info { REFINED = 41, DEREFINED = 42, REBALANCED = 4*3, MASK_INFO = ~3 }

Detailed Description

De-refinement operator using an error threshold.

This de-refinement operator marks elements in the hierarchy whose children are leaves and their combined error is below a given threshold. The errors of the children are combined by one of the following operations:

op = 0: minimum of the errors
op = 1: sum of the errors (default)
op = 2: maximum of the errors.

Definition at line 269 of file mesh_operators.hpp.

Constructor & Destructor Documentation

mfem::ThresholdDerefiner::ThresholdDerefiner ( ErrorEstimator & est )

inline

Construct a ThresholdDerefiner using the given ErrorEstimator.

Definition at line 284 of file mesh_operators.hpp.

Member Function Documentation

int mfem::ThresholdDerefiner::ApplyImpl ( Mesh & mesh )

protectedvirtual

Apply the operator to the mesh.

Returns: DEREFINED + CONTINUE if some elements were de-refined; NONE otherwise.

Implements mfem::MeshOperator.

Definition at line 142 of file mesh_operators.cpp.

virtual void mfem::ThresholdDerefiner::Reset ( )

inlinevirtual

Reset the associated estimator.

Implements mfem::MeshOperator.

Definition at line 308 of file mesh_operators.hpp.

void mfem::ThresholdDerefiner::SetNCLimit ( int nc_limit )

inline

Set the maximum ratio of refinement levels of adjacent elements (0 = unlimited).

Definition at line 301 of file mesh_operators.hpp.

void mfem::ThresholdDerefiner::SetOp ( int op )

inline

Definition at line 297 of file mesh_operators.hpp.

void mfem::ThresholdDerefiner::SetThreshold ( double thresh )

inline

Set the de-refinement threshold. The default value is zero.

Definition at line 295 of file mesh_operators.hpp.

Member Data Documentation

ErrorEstimator& mfem::ThresholdDerefiner::estimator

protected

Definition at line 272 of file mesh_operators.hpp.

int mfem::ThresholdDerefiner::nc_limit

protected

Definition at line 275 of file mesh_operators.hpp.

int mfem::ThresholdDerefiner::op

protected

Definition at line 275 of file mesh_operators.hpp.

double mfem::ThresholdDerefiner::threshold

protected

Definition at line 274 of file mesh_operators.hpp.

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation