Parallel version of vtkConnectivityFilter. More...

#include <vtkPConnectivityFilter.h>

Inheritance diagram for vtkPConnectivityFilter:

Collaboration diagram for vtkPConnectivityFilter:

Public Types
typedef vtkConnectivityFilter	Superclass

Public Types inherited from vtkConnectivityFilter
enum	RegionIdAssignment { UNSPECIFIED, CELL_COUNT_DESCENDING, CELL_COUNT_ASCENDING }
	Enumeration of the various ways to assign RegionIds when the ColorRegions option is on. More...

typedef vtkPointSetAlgorithm	Superclass

Public Types inherited from vtkPointSetAlgorithm
typedef vtkAlgorithm	Superclass

Public Types inherited from vtkAlgorithm
enum	DesiredOutputPrecision { SINGLE_PRECISION, DOUBLE_PRECISION, DEFAULT_PRECISION }
	Values used for setting the desired output precision for various algorithms. More...

typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class. More...

vtkPConnectivityFilter *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses. More...

Public Member Functions inherited from vtkConnectivityFilter
vtkConnectivityFilter *	NewInstance () const

void	InitializeSeedList ()
	Initialize list of point ids/cell ids used to seed regions. More...

void	AddSeed (vtkIdType id)
	Add a seed id (point or cell id). More...

void	DeleteSeed (vtkIdType id)
	Delete a seed id (point or cell id). More...

void	InitializeSpecifiedRegionList ()
	Initialize list of region ids to extract. More...

void	AddSpecifiedRegion (int id)
	Add a region id to extract. More...

void	DeleteSpecifiedRegion (int id)
	Delete a region id to extract. More...

int	GetNumberOfExtractedRegions ()
	Obtain the number of connected regions. More...

virtual void	SetRegionIdAssignmentMode (int)
	Set/get mode controlling how RegionIds are assigned. More...

virtual int	GetRegionIdAssignmentMode ()

int	ProcessRequest (vtkInformation , vtkInformationVector , vtkInformationVector ) override
	see vtkAlgorithm for details More...

virtual void	SetScalarConnectivity (vtkTypeBool)
	Turn on/off connectivity based on scalar value. More...

virtual vtkTypeBool	GetScalarConnectivity ()
	Turn on/off connectivity based on scalar value. More...

virtual void	ScalarConnectivityOn ()
	Turn on/off connectivity based on scalar value. More...

virtual void	ScalarConnectivityOff ()
	Turn on/off connectivity based on scalar value. More...

virtual void	SetScalarRange (double, double)
	Set the scalar range to use to extract cells based on scalar connectivity. More...

void	SetScalarRange (double[2])
	Set the scalar range to use to extract cells based on scalar connectivity. More...

virtual double *	GetScalarRange ()
	Set the scalar range to use to extract cells based on scalar connectivity. More...

virtual void	GetScalarRange (double &, double &)
	Set the scalar range to use to extract cells based on scalar connectivity. More...

virtual void	GetScalarRange (double[2])
	Set the scalar range to use to extract cells based on scalar connectivity. More...

virtual void	SetExtractionMode (int)
	Control the extraction of connected surfaces. More...

virtual int	GetExtractionMode ()
	Control the extraction of connected surfaces. More...

void	SetExtractionModeToPointSeededRegions ()
	Control the extraction of connected surfaces. More...

void	SetExtractionModeToCellSeededRegions ()
	Control the extraction of connected surfaces. More...

void	SetExtractionModeToLargestRegion ()
	Control the extraction of connected surfaces. More...

void	SetExtractionModeToSpecifiedRegions ()
	Control the extraction of connected surfaces. More...

void	SetExtractionModeToClosestPointRegion ()
	Control the extraction of connected surfaces. More...

void	SetExtractionModeToAllRegions ()
	Control the extraction of connected surfaces. More...

const char *	GetExtractionModeAsString ()
	Return the method of extraction as a string. More...

virtual void	SetClosestPoint (double, double, double)
	Use to specify x-y-z point coordinates when extracting the region closest to a specified point. More...

virtual void	SetClosestPoint (double[3])
	Use to specify x-y-z point coordinates when extracting the region closest to a specified point. More...

virtual double *	GetClosestPoint ()
	Use to specify x-y-z point coordinates when extracting the region closest to a specified point. More...

virtual void	GetClosestPoint (double data[3])
	Use to specify x-y-z point coordinates when extracting the region closest to a specified point. More...

virtual void	SetColorRegions (vtkTypeBool)
	Turn on/off the coloring of connected regions. More...

virtual vtkTypeBool	GetColorRegions ()
	Turn on/off the coloring of connected regions. More...

virtual void	ColorRegionsOn ()
	Turn on/off the coloring of connected regions. More...

virtual void	ColorRegionsOff ()
	Turn on/off the coloring of connected regions. More...

virtual void	SetOutputPointsPrecision (int)
	Set/get the desired precision for the output types. More...

virtual int	GetOutputPointsPrecision ()
	Set/get the desired precision for the output types. More...

Public Member Functions inherited from vtkPointSetAlgorithm
vtkPointSetAlgorithm *	NewInstance () const

vtkPolyData *	GetPolyDataOutput ()
	Get the output as vtkPolyData. More...

vtkStructuredGrid *	GetStructuredGridOutput ()
	Get the output as vtkStructuredGrid. More...

vtkUnstructuredGrid *	GetUnstructuredGridOutput ()
	Get the output as vtkUnstructuredGrid. More...

vtkDataObject *	GetInput ()

vtkPointSet *	GetOutput ()
	Get the output data object for a port on this algorithm. More...

vtkPointSet *	GetOutput (int)
	Get the output data object for a port on this algorithm. More...

void	SetInputData (vtkDataObject *)
	Assign a data object as input. More...

void	SetInputData (int, vtkDataObject *)
	Assign a data object as input. More...

void	SetInputData (vtkPointSet *)
	Assign a data object as input. More...

void	SetInputData (int, vtkPointSet *)
	Assign a data object as input. More...

void	AddInputData (vtkDataObject *)
	Assign a data object as input. More...

void	AddInputData (vtkPointSet *)
	Assign a data object as input. More...

void	AddInputData (int, vtkPointSet *)
	Assign a data object as input. More...

void	AddInputData (int, vtkDataObject *)
	Assign a data object as input. More...

Public Member Functions inherited from vtkAlgorithm
vtkAlgorithm *	NewInstance () const

int	HasExecutive ()
	Check whether this algorithm has an assigned executive. More...

vtkExecutive *	GetExecutive ()
	Get this algorithm's executive. More...

virtual void	SetExecutive (vtkExecutive *executive)
	Set this algorithm's executive. More...

int	ProcessRequest (vtkInformation request, vtkCollection inInfo, vtkInformationVector *outInfo)
	Version of ProcessRequest() that is wrapped. More...

virtual int	ComputePipelineMTime (vtkInformation request, vtkInformationVector inInfoVec, vtkInformationVector outInfoVec, int requestFromOutputPort, vtkMTimeType *mtime)
	A special version of ProcessRequest meant specifically for the pipeline modified time request. More...

virtual int	ModifyRequest (vtkInformation *request, int when)
	This method gives the algorithm a chance to modify the contents of a request before or after (specified in the when argument) it is forwarded. More...

vtkInformation *	GetInputPortInformation (int port)
	Get the information object associated with an input port. More...

vtkInformation *	GetOutputPortInformation (int port)
	Get the information object associated with an output port. More...

int	GetNumberOfInputPorts ()
	Get the number of input ports used by the algorithm. More...

int	GetNumberOfOutputPorts ()
	Get the number of output ports provided by the algorithm. More...

void	UpdateProgress (double amount)
	Update the progress of the process object. More...

virtual void	SetInputArrayToProcess (int idx, int port, int connection, const char fieldAssociation, const char attributeTypeorName)
	String based versions of SetInputArrayToProcess(). More...

vtkInformation *	GetInputArrayInformation (int idx)
	Get the info object for the specified input array to this algorithm. More...

void	RemoveAllInputs ()
	Remove all the input data. More...

vtkDataObject *	GetOutputDataObject (int port)
	Get the data object that will contain the algorithm output for the given port. More...

vtkDataObject *	GetInputDataObject (int port, int connection)
	Get the data object that will contain the algorithm input for the given port and given connection. More...

virtual void	RemoveInputConnection (int port, vtkAlgorithmOutput *input)
	Remove a connection from the given input port index. More...

virtual void	RemoveInputConnection (int port, int idx)
	Remove a connection given by index idx. More...

virtual void	RemoveAllInputConnections (int port)
	Removes all input connections. More...

virtual void	SetInputDataObject (int port, vtkDataObject *data)
	Sets the data-object as an input on the given port index. More...

virtual void	SetInputDataObject (vtkDataObject *data)

virtual void	AddInputDataObject (int port, vtkDataObject *data)
	Add the data-object as an input to this given port. More...

virtual void	AddInputDataObject (vtkDataObject *data)

vtkAlgorithmOutput *	GetOutputPort (int index)
	Get a proxy object corresponding to the given output port of this algorithm. More...

vtkAlgorithmOutput *	GetOutputPort ()

int	GetNumberOfInputConnections (int port)
	Get the number of inputs currently connected to a port. More...

int	GetTotalNumberOfInputConnections ()
	Get the total number of inputs for this algorithm. More...

vtkAlgorithmOutput *	GetInputConnection (int port, int index)
	Get the algorithm output port connected to an input port. More...

vtkAlgorithm *	GetInputAlgorithm (int port, int index, int &algPort)
	Returns the algorithm and the output port index of that algorithm connected to a port-index pair. More...

vtkAlgorithm *	GetInputAlgorithm (int port, int index)
	Returns the algorithm connected to a port-index pair. More...

vtkAlgorithm *	GetInputAlgorithm ()
	Equivalent to GetInputAlgorithm(0, 0). More...

vtkExecutive *	GetInputExecutive (int port, int index)
	Returns the executive associated with a particular input connection. More...

vtkExecutive *	GetInputExecutive ()
	Equivalent to GetInputExecutive(0, 0) More...

vtkInformation *	GetInputInformation (int port, int index)
	Return the information object that is associated with a particular input connection. More...

vtkInformation *	GetInputInformation ()
	Equivalent to GetInputInformation(0, 0) More...

vtkInformation *	GetOutputInformation (int port)
	Return the information object that is associated with a particular output port. More...

virtual int	Update (int port, vtkInformationVector *requests)
	This method enables the passing of data requests to the algorithm to be used during execution (in addition to bringing a particular port up-to-date). More...

virtual int	Update (vtkInformation *requests)
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual int	UpdatePiece (int piece, int numPieces, int ghostLevels, const int extents[6]=nullptr)
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual int	UpdateExtent (const int extents[6])
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual int	UpdateTimeStep (double time, int piece=-1, int numPieces=1, int ghostLevels=0, const int extents[6]=nullptr)
	Convenience method to update an algorithm after passing requests to its first output port. More...

virtual void	UpdateInformation ()
	Bring the algorithm's information up-to-date. More...

virtual void	UpdateDataObject ()
	Create output object(s). More...

virtual void	PropagateUpdateExtent ()
	Propagate meta-data upstream. More...

virtual void	UpdateWholeExtent ()
	Bring this algorithm's outputs up-to-date. More...

void	ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
	Convenience routine to convert from a linear ordering of input connections to a port/connection pair. More...

virtual vtkInformation *	GetInformation ()
	Set/Get the information object associated with this algorithm. More...

virtual void	SetInformation (vtkInformation *)
	Set/Get the information object associated with this algorithm. More...

void	Register (vtkObjectBase *o) override
	Participate in garbage collection. More...

void	UnRegister (vtkObjectBase *o) override
	Participate in garbage collection. More...

virtual void	SetAbortExecute (vtkTypeBool)
	Set/Get the AbortExecute flag for the process object. More...

virtual vtkTypeBool	GetAbortExecute ()
	Set/Get the AbortExecute flag for the process object. More...

virtual void	AbortExecuteOn ()
	Set/Get the AbortExecute flag for the process object. More...

virtual void	AbortExecuteOff ()
	Set/Get the AbortExecute flag for the process object. More...

virtual void	SetProgress (double)
	Set/Get the execution progress of a process object. More...

virtual double	GetProgress ()
	Set/Get the execution progress of a process object. More...

void	SetProgressText (const char *ptext)
	Set the current text message associated with the progress state. More...

virtual char *	GetProgressText ()
	Set the current text message associated with the progress state. More...

virtual unsigned long	GetErrorCode ()
	The error code contains a possible error that occurred while reading or writing the file. More...

virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
	Set the input data arrays that this algorithm will process. More...

virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)
	Set the input data arrays that this algorithm will process. More...

virtual void	SetInputArrayToProcess (int idx, vtkInformation *info)
	Set the input data arrays that this algorithm will process. More...

virtual void	SetInputConnection (int port, vtkAlgorithmOutput *input)
	Set the connection for the given input port index. More...

virtual void	SetInputConnection (vtkAlgorithmOutput *input)
	Set the connection for the given input port index. More...

virtual void	AddInputConnection (int port, vtkAlgorithmOutput *input)
	Add a connection to the given input port index. More...

virtual void	AddInputConnection (vtkAlgorithmOutput *input)
	Add a connection to the given input port index. More...

virtual void	Update (int port)
	Bring this algorithm's outputs up-to-date. More...

virtual void	Update ()
	Bring this algorithm's outputs up-to-date. More...

virtual void	SetReleaseDataFlag (int)
	Turn release data flag on or off for all output ports. More...

virtual int	GetReleaseDataFlag ()
	Turn release data flag on or off for all output ports. More...

void	ReleaseDataFlagOn ()
	Turn release data flag on or off for all output ports. More...

void	ReleaseDataFlagOff ()
	Turn release data flag on or off for all output ports. More...

int	UpdateExtentIsEmpty (vtkInformation pinfo, vtkDataObject output)
	This detects when the UpdateExtent will generate no data This condition is satisfied when the UpdateExtent has zero volume (0,-1,...) or the UpdateNumberOfPieces is 0. More...

int	UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)
	This detects when the UpdateExtent will generate no data This condition is satisfied when the UpdateExtent has zero volume (0,-1,...) or the UpdateNumberOfPieces is 0. More...

int *	GetUpdateExtent ()
	These functions return the update extent for output ports that use 3D extents. More...

int *	GetUpdateExtent (int port)
	These functions return the update extent for output ports that use 3D extents. More...

void	GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
	These functions return the update extent for output ports that use 3D extents. More...

void	GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
	These functions return the update extent for output ports that use 3D extents. More...

void	GetUpdateExtent (int extent[6])
	These functions return the update extent for output ports that use 3D extents. More...

void	GetUpdateExtent (int port, int extent[6])
	These functions return the update extent for output ports that use 3D extents. More...

int	GetUpdatePiece ()
	These functions return the update extent for output ports that use piece extents. More...

int	GetUpdatePiece (int port)
	These functions return the update extent for output ports that use piece extents. More...

int	GetUpdateNumberOfPieces ()
	These functions return the update extent for output ports that use piece extents. More...

int	GetUpdateNumberOfPieces (int port)
	These functions return the update extent for output ports that use piece extents. More...

int	GetUpdateGhostLevel ()
	These functions return the update extent for output ports that use piece extents. More...

int	GetUpdateGhostLevel (int port)
	These functions return the update extent for output ports that use piece extents. More...

void	SetProgressObserver (vtkProgressObserver *)
	If an ProgressObserver is set, the algorithm will report progress through it rather than directly. More...

virtual vtkProgressObserver *	GetProgressObserver ()
	If an ProgressObserver is set, the algorithm will report progress through it rather than directly. More...

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on. More...

virtual void	DebugOff ()
	Turn debugging output off. More...

bool	GetDebug ()
	Get the value of the debug flag. More...

void	SetDebug (bool debugFlag)
	Set the value of the debug flag. More...

virtual void	Modified ()
	Update the modification time for this object. More...

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time. More...

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method. More...

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...

int	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not. More...

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string. More...

virtual void	Delete ()
	Delete a VTK object. More...

virtual void	FastDelete ()
	Delete a reference to this object. More...

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream. More...

int	GetReferenceCount ()
	Return the current reference count of this object. More...

void	SetReferenceCount (int)
	Sets the reference count. More...

void	PrintRevisions (ostream &)
	Legacy. More...

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses. More...

Static Public Member Functions
static vtkTypeBool	IsTypeOf (const char *type)

static vtkPConnectivityFilter *	SafeDownCast (vtkObjectBase *o)

static vtkPConnectivityFilter *	New ()

Static Public Member Functions inherited from vtkConnectivityFilter
static vtkTypeBool	IsTypeOf (const char *type)

static vtkConnectivityFilter *	SafeDownCast (vtkObjectBase *o)

static vtkConnectivityFilter *	New ()
	Construct with default extraction mode to extract largest regions. More...

Static Public Member Functions inherited from vtkPointSetAlgorithm
static vtkPointSetAlgorithm *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkPointSetAlgorithm *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkAlgorithm
static vtkAlgorithm *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkAlgorithm *	SafeDownCast (vtkObjectBase *o)

static vtkInformationIntegerKey *	INPUT_IS_OPTIONAL ()
	Keys used to specify input port requirements. More...

static vtkInformationIntegerKey *	INPUT_IS_REPEATABLE ()

static vtkInformationInformationVectorKey *	INPUT_REQUIRED_FIELDS ()

static vtkInformationStringVectorKey *	INPUT_REQUIRED_DATA_TYPE ()

static vtkInformationInformationVectorKey *	INPUT_ARRAYS_TO_PROCESS ()

static vtkInformationIntegerKey *	INPUT_PORT ()

static vtkInformationIntegerKey *	INPUT_CONNECTION ()

static vtkInformationIntegerKey *	CAN_PRODUCE_SUB_EXTENT ()
	This key tells the executive that a particular output port is capable of producing an arbitrary subextent of the whole extent. More...

static vtkInformationIntegerKey *	CAN_HANDLE_PIECE_REQUEST ()
	Key that tells the pipeline that a particular algorithm can or cannot handle piece request. More...

static void	SetDefaultExecutivePrototype (vtkExecutive *proto)
	If the DefaultExecutivePrototype is set, a copy of it is created in CreateDefaultExecutive() using NewInstance(). More...

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes. More...

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class. More...

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkPConnectivityFilter ()

	~vtkPConnectivityFilter () override

int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector ) override
	This is called by the superclass. More...

Protected Member Functions inherited from vtkConnectivityFilter
	vtkConnectivityFilter ()

	~vtkConnectivityFilter () override

int	RequestDataObject (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector) override
	This is called by the superclass. More...

int	FillInputPortInformation (int port, vtkInformation *info) override
	Fill the input port information objects for this algorithm. More...

int	FillOutputPortInformation (int vtkNotUsed(port), vtkInformation *info) override

void	TraverseAndMark (vtkDataSet *input)

void	OrderRegionIds (vtkIdTypeArray pointRegionIds, vtkIdTypeArray cellRegionIds)

Protected Member Functions inherited from vtkPointSetAlgorithm
	vtkPointSetAlgorithm ()

	~vtkPointSetAlgorithm () override

virtual int	ExecuteInformation (vtkInformation , vtkInformationVector , vtkInformationVector )
	This is called by the superclass. More...

int	FillOutputPortInformation (int port, vtkInformation *info) override
	Fill the output port information objects for this algorithm. More...

virtual int	ComputeInputUpdateExtent (vtkInformation , vtkInformationVector , vtkInformationVector )
	This is called by the superclass. More...

Protected Member Functions inherited from vtkAlgorithm
	vtkAlgorithm ()

	~vtkAlgorithm () override

virtual void	SetNumberOfInputPorts (int n)
	Set the number of input ports used by the algorithm. More...

virtual void	SetNumberOfOutputPorts (int n)
	Set the number of output ports provided by the algorithm. More...

int	InputPortIndexInRange (int index, const char *action)

int	OutputPortIndexInRange (int index, const char *action)

int	GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
	Get the assocition of the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

vtkInformation *	GetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
	This method takes in an index (as specified in SetInputArrayToProcess) and a pipeline information vector. More...

virtual vtkExecutive *	CreateDefaultExecutive ()
	Create a default executive. More...

void	ReportReferences (vtkGarbageCollector *) override

virtual void	SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
	Replace the Nth connection on the given input port. More...

virtual void	SetNumberOfInputConnections (int port, int n)
	Set the number of input connections on the given input port. More...

void	SetInputDataInternal (int port, vtkDataObject *input)
	These methods are used by subclasses to implement methods to set data objects directly as input. More...

void	AddInputDataInternal (int port, vtkDataObject *input)

int	GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature. More...

int	GetInputArrayAssociation (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature. More...

vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature. More...

vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
	Filters that have multiple connections on one port can use this signature. More...

vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature. More...

vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input, int &association)
	Filters that have multiple connections on one port can use this signature. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
	Filters that have multiple connections on one port can use this signature. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature. More...

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)
	Filters that have multiple connections on one port can use this signature. More...

virtual void	SetErrorCode (unsigned long)
	The error code contains a possible error that occurred while reading or writing the file. More...

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events. More...

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events. More...

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Additional Inherited Members
Public Attributes inherited from vtkAlgorithm
vtkTypeBool	AbortExecute

Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKey *	PORT_REQUIREMENTS_FILLED ()

Protected Attributes inherited from vtkConnectivityFilter
vtkTypeBool	ColorRegions

int	ExtractionMode

int	OutputPointsPrecision

vtkIdList *	Seeds

vtkIdList *	SpecifiedRegionIds

vtkIdTypeArray *	RegionSizes

double	ClosestPoint [3]

vtkTypeBool	ScalarConnectivity

double	ScalarRange [2]

int	RegionIdAssignmentMode

Protected Attributes inherited from vtkAlgorithm
vtkInformation *	Information

double	Progress

char *	ProgressText

vtkProgressObserver *	ProgressObserver

unsigned long	ErrorCode
	The error code contains a possible error that occurred while reading or writing the file. More...

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

Parallel version of vtkConnectivityFilter.

This class computes connectivity of a distributed data set in parallel.

Problem

Datasets are distributed among ranks in a distributed process (Figure 1). vtkConnectivityFilter already runs in parallel on each piece in a typical VTK application run with MPI, but it does not produce correct results. As Figure 2 shows, distributed pieces of each connected component may end up with different labels.

Figure 1: Pieces in a distributed data set colored by processor rank.

Figure 2: Left). Incorrect parallel labeling. Right). Correct labeling.

The part missing from a fully parallel connectivity filter implementation is the identification of which pieces on different ranks are actually connected. This parallel filter provides that missing piece.

Approach

Run vtkConnectivityFilter on each rank’s piece and resolve the connected pieces afterwards. The implementation uses vtkMPIProcessController to communicate among processes.

Steps in the vtkPConnectivityFilter

High-level steps

Run local connectivity algorithm.
Identify region connections across ranks and create a graph of these links.
Run a connected components algorithm on the graph created in the previous step to unify the regions across ranks.
Relabel cells and points with their “global” RegionIds.

Low-level steps

In GenerateData(), invoke the superclass’s GenerateData() method. Make temporary changes to extract all connected regions - we’ll handle the different extraction modes at the end. Example results on 3 ranks are shown in Figure 3 where color indicates RegionId computed by vtkConnectivityFilter.
Check for errors in superclass GenerateData() on any rank and exit the algorithm if any encountered an error-indicating return code.

Figure 3: Results after vtkConnectivityFilter superclass is called on each piece.

AllGatherv the number of connected RegionIds from each rank and AllGatherv the RegionIds themselves.
Gather all axis-aligned bounding boxes from all other ranks. This is used to compute potential neighbors with which each rank should exchange points and RegionIds.

Figure 4: Point and associated RegionId exchange.

Each rank gathers up points potentially coincident with points on neighboring ranks and sends them to their neighbors as well as the RegionId assigned to each point.
Each rank runs through the received points and determines which points it owns using a locator object. If a point is found on the local rank, add the RegionId from the remote point to a set associated with the local RegionId. This signifies that the local RegionId is connected to the remote RegionId associated with the point.
Each rank gathers the local-RegionId-to-remote-RegionId links from all other ranks.
From these links, each rank generates a graph structure of the global links. The graph structure is identical on all ranks. (Optimization opportunity: To reduce communication, this link exchange could be avoided and the graph could be made distributed. This is just more complicated to program, however).

Figure 5: Connected region graph depicted by black line segments.

Run a connected components algorithm that relabels the RegionIds, yielding the full connectivity graph across ranks. Figure 6 shows an example result.
Relabel the remaining RegionIds by a contiguous set of RegionIds (e.g., go from [0, 5, 8, 9] to [0, 1, 2, 3]).

Figure 6: Connected components of graph linking RegionIds across ranks.

From the RegionId graph, relabel points and cells in the output. The result is shown in Figure 7.

Figure 7: Dataset relabeled with global connected RegionIds.

Handle ScalarConnectivy option and ExtractionMode after full region connectivity is determined by identifying the correct RegionId and extracting it by thresholding.

Caveats

This parallel implementation does not support a number of features that the vtkConnectivityFilter class supports, including:

ScalarConnectivity
VTK_EXTRACT_POINT_SEEDED_REGIONS extraction mode
VTK_EXTRACT_CELL_SEEDED_REGIONS extraction mode
VTK_EXTRACT_SPECIFIED_REGIONS extraction mode

Definition at line 136 of file vtkPConnectivityFilter.h.

Member Typedef Documentation

typedef vtkConnectivityFilter vtkPConnectivityFilter::Superclass

Definition at line 139 of file vtkPConnectivityFilter.h.

Constructor & Destructor Documentation

vtkPConnectivityFilter::vtkPConnectivityFilter ( )

protected

vtkPConnectivityFilter::~vtkPConnectivityFilter ( )

overrideprotected

Member Function Documentation

static vtkTypeBool vtkPConnectivityFilter::IsTypeOf ( const char * type )

static

virtual vtkTypeBool vtkPConnectivityFilter::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkConnectivityFilter.

static vtkPConnectivityFilter* vtkPConnectivityFilter::SafeDownCast ( vtkObjectBase * o )

static

virtual vtkObjectBase* vtkPConnectivityFilter::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkConnectivityFilter.

vtkPConnectivityFilter* vtkPConnectivityFilter::NewInstance ( ) const

void vtkPConnectivityFilter::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkConnectivityFilter.

static vtkPConnectivityFilter* vtkPConnectivityFilter::New ( )

static

int vtkPConnectivityFilter::RequestData	(	vtkInformation *	,
		vtkInformationVector **	,
		vtkInformationVector *
	)

overrideprotectedvirtual

This is called by the superclass.

This is the method you should override.

Reimplemented from vtkConnectivityFilter.

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

/home/demarle/Source/VTK/release/8.2/build/Utilities/Doxygen/dox/Filters/ParallelGeometry/vtkPConnectivityFilter.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Problem

Approach

Steps in the vtkPConnectivityFilter

High-level steps

Low-level steps

Caveats

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation