create 2D Voronoi convex tiling of input points More...

#include <vtkVoronoi2D.h>

Inheritance diagram for vtkVoronoi2D:

Collaboration diagram for vtkVoronoi2D:

Public Types
enum	GenerateScalarsStrategy { NONE =0, POINT_IDS =1, THREAD_IDS =2 }

enum	ProjectionPlaneStrategy { XY_PLANE =0, SPECIFIED_TRANSFORM_PLANE =1, BEST_FITTING_PLANE =2 }

Public Types inherited from vtkPolyDataAlgorithm
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
int	GetNumberOfThreadsUsed ()
	Return the number of threads actually used during execution. More...

vtkMTimeType	GetMTime () override
	Get the MTime of this object also considering the locator. More...


virtual void	SetPadding (double)
	Specify a padding for the bounding box of the points. More...

virtual double	GetPadding ()
	Specify a padding for the bounding box of the points. More...


virtual void	SetGenerateScalars (int)
	Indicate whether to create a scalar array as part of the output. More...

virtual int	GetGenerateScalars ()
	Indicate whether to create a scalar array as part of the output. More...

void	SetGenerateScalarsToNone ()
	Indicate whether to create a scalar array as part of the output. More...

void	SetGenerateScalarsToPointIds ()
	Indicate whether to create a scalar array as part of the output. More...

void	SetGenerateScalarsToThreadIds ()
	Indicate whether to create a scalar array as part of the output. More...


virtual void	SetTransform (vtkAbstractTransform *)
	Set / get the transform which is applied to points to generate a 2D problem. More...

virtual vtkAbstractTransform *	GetTransform ()
	Set / get the transform which is applied to points to generate a 2D problem. More...


virtual void	SetProjectionPlaneMode (int)
	Define the method to project the input 3D points into a 2D plane for tessellation. More...

virtual int	GetProjectionPlaneMode ()
	Define the method to project the input 3D points into a 2D plane for tessellation. More...

void	SetProjectionPlaneModeToXYPlane ()
	Define the method to project the input 3D points into a 2D plane for tessellation. More...

void	SetProjectionPlaneModeToSpecifiedTransformPlane ()
	Define the method to project the input 3D points into a 2D plane for tessellation. More...

void	SetProjectionPlaneModeToBestFittingPlane ()
	Define the method to project the input 3D points into a 2D plane for tessellation. More...


virtual void	SetPointOfInterest (vtkIdType)
	These methods are for debugging or instructional purposes. More...

virtual vtkIdType	GetPointOfInterest ()
	These methods are for debugging or instructional purposes. More...

virtual void	SetMaximumNumberOfTileClips (vtkIdType)
	These methods are for debugging or instructional purposes. More...

virtual vtkIdType	GetMaximumNumberOfTileClips ()
	These methods are for debugging or instructional purposes. More...


vtkStaticPointLocator2D *	GetLocator ()
	Retrieve the internal locator to manually configure it, for example specifying the number of points per bucket. More...


virtual void	SetGenerateVoronoiFlower (vtkTypeBool)
	These methods are for debugging or instructional purposes. More...

virtual vtkTypeBool	GetGenerateVoronoiFlower ()
	These methods are for debugging or instructional purposes. More...

virtual void	GenerateVoronoiFlowerOn ()
	These methods are for debugging or instructional purposes. More...

virtual void	GenerateVoronoiFlowerOff ()
	These methods are for debugging or instructional purposes. More...


virtual vtkSpheres *	GetSpheres ()
	Return the Voronoi flower (a collection of spheres) for the point of interest in the form of a vtkSpheres implicit function. More...

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

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

vtkDataObject *	GetInput ()

vtkDataObject *	GetInput (int port)

vtkPolyData *	GetPolyDataInput (int port)

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

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

virtual void	SetOutput (vtkDataObject *d)
	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	AddInputData (vtkDataObject *)
	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...

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...

Protected Member Functions
	vtkVoronoi2D ()

	~vtkVoronoi2D () override

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

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

Protected Member Functions inherited from vtkPolyDataAlgorithm
	vtkPolyDataAlgorithm ()

	~vtkPolyDataAlgorithm () override

virtual int	RequestInformation (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)

virtual int	RequestUpdateExtent (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...

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 &)

Protected Attributes
int	GenerateScalars

double	Padding

double	Tolerance

int	ProjectionPlaneMode

vtkStaticPointLocator2D *	Locator

vtkAbstractTransform *	Transform

vtkIdType	PointOfInterest

vtkIdType	MaximumNumberOfTileClips

vtkTypeBool	GenerateVoronoiFlower

int	NumberOfThreadsUsed

vtkSpheres *	Spheres

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

typedef vtkPolyDataAlgorithm	Superclass
	Standard methods for instantiation, type information, and printing. More...

static vtkVoronoi2D *	New ()
	Standard methods for instantiation, type information, and printing. More...

static vtkTypeBool	IsTypeOf (const char *type)
	Standard methods for instantiation, type information, and printing. More...

static vtkVoronoi2D *	SafeDownCast (vtkObjectBase *o)
	Standard methods for instantiation, type information, and printing. More...

virtual vtkTypeBool	IsA (const char *type)
	Standard methods for instantiation, type information, and printing. More...

vtkVoronoi2D *	NewInstance () const
	Standard methods for instantiation, type information, and printing. More...

void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard methods for instantiation, type information, and printing. More...

virtual vtkObjectBase *	NewInstanceInternal () const
	Standard methods for instantiation, type information, and printing. More...

Additional Inherited Members
Static Public Member Functions inherited from vtkPolyDataAlgorithm
static vtkPolyDataAlgorithm *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkPolyDataAlgorithm *	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...

Public Attributes inherited from vtkAlgorithm
vtkTypeBool	AbortExecute

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

Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

create 2D Voronoi convex tiling of input points

vtkVoronoi2D is a filter that constructs a 2D Voronoi tessellation of a list of input points. The points are assumed to lie in a plane. These points may be represented by any dataset of type vtkPointSet and subclasses. The output of the filter is a polygonal dataset. Each output cell is a convex polygon.

The 2D Voronoi tessellation is a tiling of space, where each Voronoi tile represents the region nearest to one of the input points. Voronoi tessellations are important in computational geometry (and many other fields), and are the dual of Delaunay triangulations.

The input to this filter is a list of points specified in 3D, even though the triangulation is 2D. Thus the triangulation is constructed in the x-y plane, and the z coordinate is ignored (although carried through to the output). If you desire to triangulate in a different plane, you can use the vtkTransformFilter to transform the points into and out of the x-y plane or you can specify a transform to vtkVoronoi2D directly. In the latter case, the input points are transformed, the transformed points are triangulated, and the output will use the triangulated topology for the original (non-transformed) points. This avoids transforming the data back as would be required when using the vtkTransformFilter method. Specifying a transform directly also allows any transform to be used: rigid, non-rigid, non-invertible, etc.

This filter is a reference implementation written with simplicity in mind. Additional methods are available for debugging / instructional purposes. This includes producing a single tile under various stages of creation, as well as the Voronoi flower, related to the error metric for point insertion / half-space clipping.

Publications are in preparation to describe the algorithm. A brief summary is as follows. In parallel, each (generating) input point is associated with an initial Voronoi tile, which is simply the bounding box of the point set. A locator is then used to identify nearby points: each neighbor in turn generates a clipping line positioned halfway between the generating point and the neigboring point, and orthogonal to the line connecting them. Clips are readily performed by evaluationg the vertices of the convex Voronoi tile as being on either side (inside,outside) of the clip line. If two intersections of the Voronoi tile are found, the portion of the tile "outside" the clip line is discarded, resulting in a new convex, Voronoi tile. As each clip occurs, the Voronoi "Flower" error metric (the union of error spheres) is compared to the extent of the region containing the neighboring clip points. The clip region (along with the points contained in it) is grown by careful expansion (e.g., outward spiraling iterator over all candidate clip points). When the Voronoi Flower is contained within the clip region, the algorithm terminates and the Voronoi tile is output. Once complete, it is possible to construct the Delaunay triangulation from the Voronoi tessellation. Note that topological and geometric information is used to generate a valid triangulation (e.g., merging points and validating topology).

Warning: Coincident input points will result in overlapping tiles. This is because the Voronoi tessellation requires unique input points.; This is a novel approach which implements an embarrasingly parallel algorithm. At the core of the algorithm a locator is used to determine points close to a specified position. A vtkStaticPointLocator2D is used because it is both threaded (when constructed) and supports thread-safe queries. While other locators could be used in principal, they must support thread-safe operations.; This class has been threaded with vtkSMPTools. Using TBB or other non-sequential type (set in the CMake variable VTK_SMP_IMPLEMENTATION_TYPE) may improve performance significantly.

See also: vtkDelaunay2D vtkTransformFilter vtkStaticPointLocator2D

Tests:: vtkVoronoi2D (Tests)

Definition at line 105 of file vtkVoronoi2D.h.

Member Typedef Documentation

typedef vtkPolyDataAlgorithm vtkVoronoi2D::Superclass

Standard methods for instantiation, type information, and printing.

Definition at line 113 of file vtkVoronoi2D.h.

Member Enumeration Documentation

enum vtkVoronoi2D::GenerateScalarsStrategy

Enumerator
NONE
POINT_IDS
THREAD_IDS

Definition at line 128 of file vtkVoronoi2D.h.

enum vtkVoronoi2D::ProjectionPlaneStrategy

Enumerator
XY_PLANE
SPECIFIED_TRANSFORM_PLANE
BEST_FITTING_PLANE

Definition at line 165 of file vtkVoronoi2D.h.

Constructor & Destructor Documentation

vtkVoronoi2D::vtkVoronoi2D ( )

protected

vtkVoronoi2D::~vtkVoronoi2D ( )

overrideprotected

Member Function Documentation

static vtkVoronoi2D* vtkVoronoi2D::New ( )

static

Standard methods for instantiation, type information, and printing.

static vtkTypeBool vtkVoronoi2D::IsTypeOf ( const char * type )

static

Standard methods for instantiation, type information, and printing.

virtual vtkTypeBool vtkVoronoi2D::IsA ( const char * type )

virtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkPolyDataAlgorithm.

static vtkVoronoi2D* vtkVoronoi2D::SafeDownCast ( vtkObjectBase * o )

static

Standard methods for instantiation, type information, and printing.

virtual vtkObjectBase* vtkVoronoi2D::NewInstanceInternal ( ) const

protectedvirtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkPolyDataAlgorithm.

vtkVoronoi2D* vtkVoronoi2D::NewInstance ( ) const

Standard methods for instantiation, type information, and printing.

void vtkVoronoi2D::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkPolyDataAlgorithm.

virtual void vtkVoronoi2D::SetPadding ( double )

virtual

Specify a padding for the bounding box of the points.

A >0 padding is necessary in order to create valid Voronoi tiles on the boundary of the tessellation. The padding is specified as a fraction of the diagonal length of the bounding box of the points.

virtual double vtkVoronoi2D::GetPadding ( )

virtual

Specify a padding for the bounding box of the points.

A >0 padding is necessary in order to create valid Voronoi tiles on the boundary of the tessellation. The padding is specified as a fraction of the diagonal length of the bounding box of the points.

virtual void vtkVoronoi2D::SetGenerateScalars ( int )

virtual

Indicate whether to create a scalar array as part of the output.

No scalars; point ids, or execution thread ids may be output. By default no scalars are generated.

virtual int vtkVoronoi2D::GetGenerateScalars ( )

virtual

Indicate whether to create a scalar array as part of the output.

No scalars; point ids, or execution thread ids may be output. By default no scalars are generated.

void vtkVoronoi2D::SetGenerateScalarsToNone ( )

inline

Indicate whether to create a scalar array as part of the output.

No scalars; point ids, or execution thread ids may be output. By default no scalars are generated.

Definition at line 143 of file vtkVoronoi2D.h.

void vtkVoronoi2D::SetGenerateScalarsToPointIds ( )

inline

Indicate whether to create a scalar array as part of the output.

No scalars; point ids, or execution thread ids may be output. By default no scalars are generated.

Definition at line 145 of file vtkVoronoi2D.h.

void vtkVoronoi2D::SetGenerateScalarsToThreadIds ( )

inline

Indicate whether to create a scalar array as part of the output.

No scalars; point ids, or execution thread ids may be output. By default no scalars are generated.

Definition at line 147 of file vtkVoronoi2D.h.

virtual void vtkVoronoi2D::SetTransform ( vtkAbstractTransform * )

virtual

Set / get the transform which is applied to points to generate a 2D problem.

This maps a 3D dataset into a 2D dataset where triangulation can be done on the XY plane. The points are then tessellated and the topology of tessellation are used as the output topology. The output points are the original (untransformed) points. The transform can be any subclass of vtkAbstractTransform (thus it does not need to be a linear or invertible transform).

virtual vtkAbstractTransform* vtkVoronoi2D::GetTransform ( )

virtual

Set / get the transform which is applied to points to generate a 2D problem.

This maps a 3D dataset into a 2D dataset where triangulation can be done on the XY plane. The points are then tessellated and the topology of tessellation are used as the output topology. The output points are the original (untransformed) points. The transform can be any subclass of vtkAbstractTransform (thus it does not need to be a linear or invertible transform).

virtual void vtkVoronoi2D::SetProjectionPlaneMode ( int )

virtual

Define the method to project the input 3D points into a 2D plane for tessellation.

When the VTK_XY_PLANE is set, the z-coordinate is simply ignored. When VTK_SET_TRANSFORM_PLANE is set, then a transform must be supplied and the points are transformed using it. Finally, if VTK_BEST_FITTING_PLANE is set, then the filter computes a best fitting plane and projects the points onto it.

virtual int vtkVoronoi2D::GetProjectionPlaneMode ( )

virtual

Define the method to project the input 3D points into a 2D plane for tessellation.

When the VTK_XY_PLANE is set, the z-coordinate is simply ignored. When VTK_SET_TRANSFORM_PLANE is set, then a transform must be supplied and the points are transformed using it. Finally, if VTK_BEST_FITTING_PLANE is set, then the filter computes a best fitting plane and projects the points onto it.

void vtkVoronoi2D::SetProjectionPlaneModeToXYPlane ( )

inline

Define the method to project the input 3D points into a 2D plane for tessellation.

When the VTK_XY_PLANE is set, the z-coordinate is simply ignored. When VTK_SET_TRANSFORM_PLANE is set, then a transform must be supplied and the points are transformed using it. Finally, if VTK_BEST_FITTING_PLANE is set, then the filter computes a best fitting plane and projects the points onto it.

Definition at line 183 of file vtkVoronoi2D.h.

void vtkVoronoi2D::SetProjectionPlaneModeToSpecifiedTransformPlane ( )

inline

Define the method to project the input 3D points into a 2D plane for tessellation.

When the VTK_XY_PLANE is set, the z-coordinate is simply ignored. When VTK_SET_TRANSFORM_PLANE is set, then a transform must be supplied and the points are transformed using it. Finally, if VTK_BEST_FITTING_PLANE is set, then the filter computes a best fitting plane and projects the points onto it.

Definition at line 185 of file vtkVoronoi2D.h.

void vtkVoronoi2D::SetProjectionPlaneModeToBestFittingPlane ( )

inline

Define the method to project the input 3D points into a 2D plane for tessellation.

When the VTK_XY_PLANE is set, the z-coordinate is simply ignored. When VTK_SET_TRANSFORM_PLANE is set, then a transform must be supplied and the points are transformed using it. Finally, if VTK_BEST_FITTING_PLANE is set, then the filter computes a best fitting plane and projects the points onto it.

Definition at line 187 of file vtkVoronoi2D.h.

virtual void vtkVoronoi2D::SetPointOfInterest ( vtkIdType )

virtual

These methods are for debugging or instructional purposes.

When the point of interest is specified (i.e., to a non-negative number) then the algorithm will only process this single point (whose id is the PointOfInterest). The maximum number of clips (the MaximumNumberOfTileClips) can be specified. If MaximumNumberOfTileClips=0, then the initial tile (single point within the bounding box) is produced; if =1 then the split with the closest point is produced; and so on. By default the PointOfInterest is set to (-1), and the number of clips is unlimited (i.e., MaximumNumberOfTileClips=VTK_ID_MAX and therefore automatically limited by the algorithm).

virtual vtkIdType vtkVoronoi2D::GetPointOfInterest ( )

virtual

These methods are for debugging or instructional purposes.

When the point of interest is specified (i.e., to a non-negative number) then the algorithm will only process this single point (whose id is the PointOfInterest). The maximum number of clips (the MaximumNumberOfTileClips) can be specified. If MaximumNumberOfTileClips=0, then the initial tile (single point within the bounding box) is produced; if =1 then the split with the closest point is produced; and so on. By default the PointOfInterest is set to (-1), and the number of clips is unlimited (i.e., MaximumNumberOfTileClips=VTK_ID_MAX and therefore automatically limited by the algorithm).

virtual void vtkVoronoi2D::SetMaximumNumberOfTileClips ( vtkIdType )

virtual

These methods are for debugging or instructional purposes.

When the point of interest is specified (i.e., to a non-negative number) then the algorithm will only process this single point (whose id is the PointOfInterest). The maximum number of clips (the MaximumNumberOfTileClips) can be specified. If MaximumNumberOfTileClips=0, then the initial tile (single point within the bounding box) is produced; if =1 then the split with the closest point is produced; and so on. By default the PointOfInterest is set to (-1), and the number of clips is unlimited (i.e., MaximumNumberOfTileClips=VTK_ID_MAX and therefore automatically limited by the algorithm).

virtual vtkIdType vtkVoronoi2D::GetMaximumNumberOfTileClips ( )

virtual

These methods are for debugging or instructional purposes.

When the point of interest is specified (i.e., to a non-negative number) then the algorithm will only process this single point (whose id is the PointOfInterest). The maximum number of clips (the MaximumNumberOfTileClips) can be specified. If MaximumNumberOfTileClips=0, then the initial tile (single point within the bounding box) is produced; if =1 then the split with the closest point is produced; and so on. By default the PointOfInterest is set to (-1), and the number of clips is unlimited (i.e., MaximumNumberOfTileClips=VTK_ID_MAX and therefore automatically limited by the algorithm).

vtkStaticPointLocator2D* vtkVoronoi2D::GetLocator ( )

inline

Retrieve the internal locator to manually configure it, for example specifying the number of points per bucket.

This method is generally used for debugging or testing purposes.

Definition at line 217 of file vtkVoronoi2D.h.

virtual void vtkVoronoi2D::SetGenerateVoronoiFlower ( vtkTypeBool )

virtual

These methods are for debugging or instructional purposes.

If GenerateVoronoiFlower is on, and the PointOfIntersect is specified, then second and third (optional) outputs are populated which contains a representation of the Voronoi flower error metric (second output) and the single Voronoi tile (corresponding to PointOfInterest) with point scalar values indicating the radii of the Voronoi Flower petals (i.e., circles contributing to the error metric).

virtual vtkTypeBool vtkVoronoi2D::GetGenerateVoronoiFlower ( )

virtual

These methods are for debugging or instructional purposes.

If GenerateVoronoiFlower is on, and the PointOfIntersect is specified, then second and third (optional) outputs are populated which contains a representation of the Voronoi flower error metric (second output) and the single Voronoi tile (corresponding to PointOfInterest) with point scalar values indicating the radii of the Voronoi Flower petals (i.e., circles contributing to the error metric).

virtual void vtkVoronoi2D::GenerateVoronoiFlowerOn ( )

virtual

These methods are for debugging or instructional purposes.

If GenerateVoronoiFlower is on, and the PointOfIntersect is specified, then second and third (optional) outputs are populated which contains a representation of the Voronoi flower error metric (second output) and the single Voronoi tile (corresponding to PointOfInterest) with point scalar values indicating the radii of the Voronoi Flower petals (i.e., circles contributing to the error metric).

virtual void vtkVoronoi2D::GenerateVoronoiFlowerOff ( )

virtual

These methods are for debugging or instructional purposes.

If GenerateVoronoiFlower is on, and the PointOfIntersect is specified, then second and third (optional) outputs are populated which contains a representation of the Voronoi flower error metric (second output) and the single Voronoi tile (corresponding to PointOfInterest) with point scalar values indicating the radii of the Voronoi Flower petals (i.e., circles contributing to the error metric).

virtual vtkSpheres* vtkVoronoi2D::GetSpheres ( )

virtual

Return the Voronoi flower (a collection of spheres) for the point of interest in the form of a vtkSpheres implicit function.

This is valid only if GenerateVoronoiFlower and the PointOfInterest are set, and after the filter executes. Typically this is used for debugging or educational purposes.

int vtkVoronoi2D::GetNumberOfThreadsUsed ( )

inline

Return the number of threads actually used during execution.

This is valid only after algorithm execution.

Definition at line 251 of file vtkVoronoi2D.h.

vtkMTimeType vtkVoronoi2D::GetMTime ( )

overridevirtual

Get the MTime of this object also considering the locator.

Reimplemented from vtkObject.

int vtkVoronoi2D::RequestData	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)

overrideprotectedvirtual

This is called by the superclass.

This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

int vtkVoronoi2D::FillInputPortInformation	(	int	port,
		vtkInformation *	info
	)

overrideprotectedvirtual

Fill the input port information objects for this algorithm.

This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle.

Reimplemented from vtkPolyDataAlgorithm.

Member Data Documentation

int vtkVoronoi2D::GenerateScalars

protected

Definition at line 263 of file vtkVoronoi2D.h.

double vtkVoronoi2D::Padding

protected

Definition at line 264 of file vtkVoronoi2D.h.

double vtkVoronoi2D::Tolerance

protected

Definition at line 265 of file vtkVoronoi2D.h.

int vtkVoronoi2D::ProjectionPlaneMode

protected

Definition at line 266 of file vtkVoronoi2D.h.

vtkStaticPointLocator2D* vtkVoronoi2D::Locator

protected

Definition at line 267 of file vtkVoronoi2D.h.

vtkAbstractTransform* vtkVoronoi2D::Transform

protected

Definition at line 268 of file vtkVoronoi2D.h.

vtkIdType vtkVoronoi2D::PointOfInterest

protected

Definition at line 269 of file vtkVoronoi2D.h.

vtkIdType vtkVoronoi2D::MaximumNumberOfTileClips

protected

Definition at line 270 of file vtkVoronoi2D.h.

vtkTypeBool vtkVoronoi2D::GenerateVoronoiFlower

protected

Definition at line 271 of file vtkVoronoi2D.h.

int vtkVoronoi2D::NumberOfThreadsUsed

protected

Definition at line 272 of file vtkVoronoi2D.h.

vtkSpheres* vtkVoronoi2D::Spheres

protected

Definition at line 273 of file vtkVoronoi2D.h.

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

/home/demarle/Source/VTK/release/8.2/build/Utilities/Doxygen/dox/Filters/Core/vtkVoronoi2D.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation