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BRMeshRefine Class Reference

class which manages Berger-Rigoutsos grid generation More...

#include <BRMeshRefine.H>

Inheritance diagram for BRMeshRefine:

[legend]Collaboration diagram for BRMeshRefine:

Public Methods
	BRMeshRefine ()
	default constructor -- leaves object in an unusable state
	BRMeshRefine (const Box &a_baseDomain, const Vector< int > &a_refRatios, const Real a_fillRatio, const int a_blockFactor, const int a_bufferSize, const int a_maxSize)
	full constructor -- leaves object in usable state
	BRMeshRefine (const ProblemDomain &a_baseDomain, const Vector< int > &a_refRatios, const Real a_fillRatio, const int a_blockFactor, const int a_bufferSize, const int a_maxSize)
	full constructor -- leaves object in usable state
virtual	~BRMeshRefine ()
	destructor
void	define (const Box &a_baseDomain, const Vector< int > &a_refRatios, const Real a_fillRatio, const int a_blockFactor, const int a_bufferSize, const int a_maxSize)
	define function -- size of RefRatios will define maximum number of levels
void	define (const ProblemDomain &a_baseDomain, const Vector< int > &a_refRatios, const Real a_fillRatio, const int a_blockFactor, const int a_bufferSize, const int a_maxSize)
	define function -- size of RefRatios will define maximum number of levels
void	makeBoxes (Vector< Box > &a_mesh, const IntVectSet &a_tags, const IntVectSet &a_pnd, const ProblemDomain &a_domain, const int a_maxSize) const
	constructs a set of boxes which covers a set of tagged cells
Protected Methods
void	splitBox (Vector< Box > &a_boxes,const int a_boxindex, const int a_dimension,const int a_maxboxsize) const
Vector< int >	makeTrace (const IntVectSet &a_Ivs,int a_dir) const
int	findSplit (const Vector< int > &a_trace) const
int	findMaxInflectionPoint (const Vector< int > &a_trace,int &a_maxVal) const
void	splitTags (const IntVectSet &a_tags, const int a_split_dir,const int a_split_indx, IntVectSet &a_tags_lo,IntVectSet &a_tags_hi) const
void	breakBoxes (Vector< Box > &a_vboxin, const int &a_maxSize, const int &a_idir) const
int	maxloc (const int *a_V,const int a_Size) const

Detailed Description

class which manages Berger-Rigoutsos grid generation

This class manages grid generation from sets of tagged cells using the Berger-Rigoutsos algorithm in the context of the MeshRefine class from which it is derived

There are two ways grids can be defined based on tagged cells. one takes a single IntVectSet of tags defined on the BaseLevel mesh and uses that set of tags for every level to be refined; the other takes a Vector<IntVectSet> of tags defined on all the mesh levels to be refined and uses those. \ \

{\bf Long Description:} \

Create new meshes based on tagged cells on a range of levels of a mesh hierarchy. Each level of tagged cells is used to generate a new mesh at the next finer level. The finest level in the output mesh will be one level higher than the top of the range of levels given as input. As a special case, use the same tags (appropriately refined) for all levels.

Usage:

Call the regrid functions after computing error estimates and tagging cells. To add a new mesh level, set TopLevel to the index of the finest level in the existing mesh and define tags on the finest level. To keep the existing number of mesh levels, set TopLevel to one less than the index of the finest level and don't define any tags on the finest level. If a single IntVectSet of tags is passed (instead of a Vector<IntVectSet>) then the same tags (properly refined) will be used for all the new meshes up to level TopLevel+1. In any case, the meshes at levels BaseLevel and below are not modified. The output argument newmeshes will be reallocated to the necessary size before being used. When this function returns, the elements of the newmeshes vector corresponding to the unchanged levels will be filled in with copies of the levels from the old mesh vector. The variable tags is modified in an undefined way, so its contents should not be relied upon. The variable BlockFactor specifies the amount by which each box will be coarsenable. Every grid box will have an integral multiple of BlockFactor cells in each dimension and also lower index values that are integral multiples. As a side effect, the minimum box size will be BlockFactor.

Expensive validations are done only when debugging is enabled (i.e. the DEBUG make variable is "TRUE").

Usage Notes:

All the input vectors should be defined with max index >= TopLevel. They should have values for indices [BaseLevel:TopLevel]. (except for OldMeshes, which must be defined for all indices). The new mesh vector newmeshes will be redefined up to index TopLevel+1. RefRatios should be defined such that RefRatios[L] is the value to use to refine the level L mesh to produce the level L+1 mesh. The tags vector is modified in an undefined manner. The output variable newmeshes may not be completely defined if an exception occurs. The BlockFactor can be used to force a minimum box size.

Constructor & Destructor Documentation

BRMeshRefine::BRMeshRefine ( )

default constructor -- leaves object in an unusable state

BRMeshRefine::BRMeshRefine ( const Box & a_baseDomain,

const Vector< int > & a_refRatios,

const Real a_fillRatio,

const int a_blockFactor,

const int a_bufferSize,

const int a_maxSize

)

full constructor -- leaves object in usable state

Parameters:

a_baseDomain level 0 domain

a_refRatios refinement ratios -- refRatio[0] is btwn levels 0 and 1

a_fillRatio measure of how efficiently tagged cells will be covered

a_blockFactor amount by which grids are guaranteed to be coarsenable

a_bufferSize proper nesting buffer amount

a_maxSize maximum grid length in any direction -- 0 means no limit.

BRMeshRefine::BRMeshRefine ( const ProblemDomain & a_baseDomain,

const Vector< int > & a_refRatios,

const Real a_fillRatio,

const int a_blockFactor,

const int a_bufferSize,

const int a_maxSize

)

full constructor -- leaves object in usable state

Parameters:

a_baseDomain level 0 domain

a_refRatios refinement ratios -- refRatio[0] is btwn levels 0 and 1

a_fillRatio measure of how efficiently tagged cells will be covered

a_blockFactor amount by which grids are guaranteed to be coarsenable

a_bufferSize proper nesting buffer amount

a_maxSize maximum grid length in any direction -- 0 means no limit.

virtual BRMeshRefine::~BRMeshRefine ( ) [virtual]

destructor

Member Function Documentation

void BRMeshRefine::breakBoxes ( Vector< Box > & a_vboxin,

const int & a_maxSize,

const int & a_idir

) const [protected]

void BRMeshRefine::define ( const ProblemDomain & a_baseDomain,

const Vector< int > & a_refRatios,

const Real a_fillRatio,

const int a_blockFactor,

const int a_bufferSize,

const int a_maxSize

)

define function -- size of RefRatios will define maximum number of levels

Parameters:

a_baseDomain level 0 domain

a_refRatios refinement ratios -- refRatio[0] is btwn levels 0 and 1

a_fillRatio measure of how efficiently tagged cells will be covered

a_blockFactor amount by which grids are guaranteed to be coarsenable

a_bufferSize proper nesting buffer amount

a_maxSize maximum grid length in any direction -- 0 means no limit

Reimplemented from MeshRefine.

void BRMeshRefine::define ( const Box & a_baseDomain,

const Vector< int > & a_refRatios,

const Real a_fillRatio,

const int a_blockFactor,

const int a_bufferSize,

const int a_maxSize

)

define function -- size of RefRatios will define maximum number of levels

Parameters:

a_baseDomain level 0 domain

a_refRatios refinement ratios -- refRatio[0] is btwn levels 0 and 1

a_fillRatio measure of how efficiently tagged cells will be covered

a_blockFactor amount by which grids are guaranteed to be coarsenable

a_bufferSize proper nesting buffer amount

a_maxSize maximum grid length in any direction -- 0 means no limit

Reimplemented from MeshRefine.

int BRMeshRefine::findMaxInflectionPoint ( const Vector< int > & a_trace,

int & a_maxVal

) const [protected]

int BRMeshRefine::findSplit ( const Vector< int > & a_trace ) const [protected]

void BRMeshRefine::makeBoxes ( Vector< Box > & a_mesh,

const IntVectSet & a_tags,

const IntVectSet & a_pnd,

const ProblemDomain & a_domain,

const int a_maxSize

) const [virtual]

constructs a set of boxes which covers a set of tagged cells
constructs a set of boxes which covers a set of tagged cells by using the Berger-Rigoutsos algorithm. Everything should be on the same level, and blocking factor is not applied. Boxes will be on the same refinement level as the tags. This would normally be a protected function, but it can be useful to call it on it's own, so it has been left public.
Parameters:

a_mesh output: refined boxes at each new level

a_tags input: set of tagged cells to cover

a_pnd input: proper nesting domain in which mesh boxes must live

a_domain input: physical domain

a_maxSize input: largest number of cells in any dimension for any box

Implements MeshRefine.

Vector<int> BRMeshRefine::makeTrace ( const IntVectSet & a_Ivs,

int a_dir

) const [protected]

int BRMeshRefine::maxloc ( const int * a_V,

const int a_Size

) const [protected]

void BRMeshRefine::splitBox ( Vector< Box > & a_boxes,

const int a_boxindex,

const int a_dimension,

const int a_maxboxsize

) const [protected]

void BRMeshRefine::splitTags ( const IntVectSet & a_tags,

const int a_split_dir,

const int a_split_indx,

IntVectSet & a_tags_lo,

IntVectSet & a_tags_hi

) const [protected]

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

BRMeshRefine.H

Generated on Tue Jul 2 10:44:04 2002 for Chombo by

1.2.16

BRMeshRefine Class Reference

Public Methods

Protected Methods

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation