Evenly spaced streamline generator for 2D. More...

#include <vtkEvenlySpacedStreamlines2D.h>

Inheritance diagram for vtkEvenlySpacedStreamlines2D:

Collaboration diagram for vtkEvenlySpacedStreamlines2D:

Public Types
typedef vtkPolyDataAlgorithm	Superclass

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

vtkEvenlySpacedStreamlines2D *	NewInstance () const

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

void	SetInterpolatorTypeToDataSetPointLocator ()
	Set the velocity field interpolator type to the one involving a dataset point locator.

void	SetInterpolatorTypeToCellLocator ()
	Set the velocity field interpolator type to the one involving a cell locator.

void	SetIntegrationStepUnit (int unit)
	Specify a uniform integration step unit for InitialIntegrationStep, and SeparatingDistance.

int	GetIntegrationStepUnit ()

void	SetInterpolatorPrototype (vtkAbstractInterpolatedVelocityField *ivf)
	The object used to interpolate the velocity field during integration is of the same class as this prototype.

void	SetInterpolatorType (int interpType)
	Set the type of the velocity field interpolator to determine whether INTERPOLATOR_WITH_DATASET_POINT_LOCATOR or INTERPOLATOR_WITH_CELL_LOCATOR is employed for locating cells during streamline integration.


virtual void	SetStartPosition (double, double, double)
	Specify the starting point (seed) of the first streamline in the global coordinate system.

virtual void	SetStartPosition (double[3])
	Specify the starting point (seed) of the first streamline in the global coordinate system.

virtual double *	GetStartPosition ()
	Specify the starting point (seed) of the first streamline in the global coordinate system.

virtual void	GetStartPosition (double &, double &, double &)
	Specify the starting point (seed) of the first streamline in the global coordinate system.

virtual void	GetStartPosition (double[3])
	Specify the starting point (seed) of the first streamline in the global coordinate system.


void	SetIntegrator (vtkInitialValueProblemSolver *)
	Set/get the integrator type to be used for streamline generation.

virtual vtkInitialValueProblemSolver *	GetIntegrator ()
	Set/get the integrator type to be used for streamline generation.

void	SetIntegratorType (int type)
	Set/get the integrator type to be used for streamline generation.

int	GetIntegratorType ()
	Set/get the integrator type to be used for streamline generation.

void	SetIntegratorTypeToRungeKutta2 ()
	Set/get the integrator type to be used for streamline generation.

void	SetIntegratorTypeToRungeKutta4 ()
	Set/get the integrator type to be used for streamline generation.


virtual void	SetMaximumNumberOfSteps (vtkIdType)
	Specify the maximum number of steps for integrating a streamline.

virtual vtkIdType	GetMaximumNumberOfSteps ()
	Specify the maximum number of steps for integrating a streamline.


virtual void	SetMinimumNumberOfLoopPoints (vtkIdType)
	We don't try to eliminate loops with fewer points than this.

virtual vtkIdType	GetMinimumNumberOfLoopPoints ()
	We don't try to eliminate loops with fewer points than this.


virtual void	SetInitialIntegrationStep (double)
	Specify the Initial step size used for line integration, expressed in IntegrationStepUnit.

virtual double	GetInitialIntegrationStep ()
	Specify the Initial step size used for line integration, expressed in IntegrationStepUnit.


virtual void	SetSeparatingDistance (double)
	Specify the separation distance between streamlines expressed in IntegrationStepUnit.

virtual double	GetSeparatingDistance ()
	Specify the separation distance between streamlines expressed in IntegrationStepUnit.


virtual void	SetSeparatingDistanceRatio (double)
	Streamline integration is stopped if streamlines are closer than SeparatingDistance*SeparatingDistanceRatio to other streamlines.

virtual double	GetSeparatingDistanceRatio ()
	Streamline integration is stopped if streamlines are closer than SeparatingDistance*SeparatingDistanceRatio to other streamlines.


virtual void	SetClosedLoopMaximumDistance (double)
	Loops are considered closed if the have two points at distance less than this.

virtual double	GetClosedLoopMaximumDistance ()
	Loops are considered closed if the have two points at distance less than this.


virtual void	SetLoopAngle (double)
	The angle (in radians) between the vector created by p0p1 and the velocity in the point closing the loop.

virtual double	GetLoopAngle ()
	The angle (in radians) between the vector created by p0p1 and the velocity in the point closing the loop.


virtual void	SetTerminalSpeed (double)
	Specify the terminal speed value, below which integration is terminated.

virtual double	GetTerminalSpeed ()
	Specify the terminal speed value, below which integration is terminated.


virtual void	SetComputeVorticity (bool)
	Turn on/off vorticity computation at streamline points (necessary for generating proper stream-ribbons using the vtkRibbonFilter.

virtual bool	GetComputeVorticity ()
	Turn on/off vorticity computation at streamline points (necessary for generating proper stream-ribbons using the vtkRibbonFilter.

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

vtkPolyDataAlgorithm *	NewInstance () const

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

vtkTypeBool	ProcessRequest (vtkInformation , vtkInformationVector , vtkInformationVector ) override
	see vtkAlgorithm for details

vtkDataObject *	GetInput ()

vtkDataObject *	GetInput (int port)

vtkPolyData *	GetPolyDataInput (int port)

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

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

virtual void	SetOutput (vtkDataObject *d)
	Get the output data object for a port on this algorithm.

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

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

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

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

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

vtkAlgorithm *	NewInstance () const

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

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

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

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

virtual vtkTypeBool	ProcessRequest (vtkInformation request, vtkInformationVector inInfo, vtkInformationVector outInfo)
	Upstream/Downstream requests form the generalized interface through which executives invoke a algorithm's functionality.

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

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.

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.

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

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

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

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

void	SetAbortExecuteAndUpdateTime ()
	Set AbortExecute Flag and update LastAbortTime.

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

bool	CheckAbort ()
	Checks to see if this filter should abort.

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

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

void	RemoveAllInputs ()
	Remove all the input data.

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

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

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

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

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

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

virtual void	SetInputDataObject (vtkDataObject *data)

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

virtual void	AddInputDataObject (vtkDataObject *data)

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

vtkAlgorithmOutput *	GetOutputPort ()

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

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

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

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.

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

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

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

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

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

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

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

virtual vtkTypeBool	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).

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

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.

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

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.

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

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

virtual void	PropagateUpdateExtent ()
	Propagate meta-data upstream.

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

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

void	RemoveNoPriorTemporalAccessInformationKey ()
	Removes any information key `vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS()` to all output ports of this `vtkAlgorithm`.

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

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

bool	UsesGarbageCollector () const override
	Participate in garbage collection.

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

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

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

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

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

void	SetContainerAlgorithm (vtkAlgorithm *containerAlg)
	Set/get a Container algorithm for this algorithm.

vtkAlgorithm *	GetContainerAlgorithm ()
	Set/get a Container algorithm for this algorithm.

virtual void	SetAbortOutput (bool)
	Set/Get an internal variable used to communicate between the algorithm and executive.

virtual bool	GetAbortOutput ()
	Set/Get an internal variable used to communicate between the algorithm and executive.

void	SetProgressShiftScale (double shift, double scale)
	Specify the shift and scale values to use to apply to the progress amount when `UpdateProgress` is called.

virtual double	GetProgressShift ()
	Specify the shift and scale values to use to apply to the progress amount when `UpdateProgress` is called.

virtual double	GetProgressScale ()
	Specify the shift and scale values to use to apply to the progress amount when `UpdateProgress` is called.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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.

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

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

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.

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.

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

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

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

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

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

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

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

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

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

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

void	SetNoPriorTemporalAccessInformationKey (int key)
	Set to all output ports of this algorithm the information key `vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS()`.

void	SetNoPriorTemporalAccessInformationKey ()
	Set to all output ports of this algorithm the information key `vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS()`.

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

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

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

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

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

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

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

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)

vtkTypeBool	InvokeEvent (unsigned long event)

vtkTypeBool	InvokeEvent (const char *event)

std::string	GetObjectDescription () const override
	The object description printed in messages and PrintSelf output.

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

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

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

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

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

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

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

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

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.

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.

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.

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

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

virtual void	SetObjectName (const std::string &objectName)
	Set/get the name of this object for reporting purposes.

virtual std::string	GetObjectName () const
	Set/get the name of this object for reporting purposes.

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

virtual std::string	GetObjectDescription () const
	The object description printed in messages and PrintSelf output.

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

virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

virtual void	Delete ()
	Delete a VTK object.

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

void	InitializeObjectBase ()

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

void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).

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

void	SetReferenceCount (int)
	Sets the reference count.

bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.

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

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

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

static vtkEvenlySpacedStreamlines2D *	SafeDownCast (vtkObjectBase *o)

static vtkEvenlySpacedStreamlines2D *	New ()
	Construct object to start from position (0,0,0), with forward integration, terminal speed 1.0E-12, vorticity computation on, integration step size 0.5 (in cell length unit), maximum number of steps 2000, using Runge-Kutta2, and maximum propagation 1.0 (in arc length unit).

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.

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.

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

static vtkInformationIntegerKey *	ABORTED ()

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

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.

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

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

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

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

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

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.

static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

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

static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.

static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Types
enum	DistanceType { DISTANCE , DISTANCE_RATIO }
	Do we test for separating distance or a ratio of the separating distance. More...

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkEvenlySpacedStreamlines2D ()

	~vtkEvenlySpacedStreamlines2D () override

void	AddInput (vtkDataObject *)

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

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

int	SetupOutput (vtkInformation inInfo, vtkInformation outInfo)

int	CheckInputs (vtkAbstractInterpolatedVelocityField &func, int maxCellSize)

double	ConvertToLength (double interval, int unit, double cellLength)

void	InitializeSuperposedGrid (double *bounds)

void	AddToAllPoints (vtkPolyData *streamline)

void	AddToCurrentPoints (vtkIdType pointId)

template<typename T >
void	InitializePoints (T &points)

void	InitializeMinPointIds ()

template<typename CellCheckerType >
bool	ForEachCell (double point, CellCheckerType checker, vtkPoints points=nullptr, vtkDataArray *velocity=nullptr, int direction=1)

template<int distanceType>
bool	IsTooClose (double point, vtkIdType cellId, vtkPoints points, vtkDataArray *velocity, int direction)

bool	IsLooping (double point, vtkIdType cellId, vtkPoints points, vtkDataArray *velocity, int direction)

const char *	GetInputArrayToProcessName ()

int	ComputeCellLength (double *cellLength)

Protected Member Functions inherited from vtkPolyDataAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkPolyDataAlgorithm ()

	~vtkPolyDataAlgorithm () override

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

virtual int	RequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)
	This is called by the superclass.

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

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

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

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

Protected Member Functions inherited from vtkAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkAlgorithm ()

	~vtkAlgorithm () override

bool	CheckUpstreamAbort ()
	Checks to see if an upstream filter has been aborted.

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

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

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

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

int	InputPortIndexInRange (int index, const char *action)

int	OutputPortIndexInRange (int index, const char *action)

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

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

virtual vtkExecutive *	CreateDefaultExecutive ()
	Create a default executive.

void	ReportReferences (vtkGarbageCollector *) override

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

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

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

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.

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

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.

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.

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

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

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

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

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.

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.

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

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

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

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

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

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.

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

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	ReportReferences (vtkGarbageCollector *)

virtual void	ObjectFinalize ()

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Static Protected Member Functions
static void	GetBounds (vtkCompositeDataSet *cds, double bounds[6])

static bool	IsStreamlineLooping (void clientdata, vtkPoints points, vtkDataArray *velocity, int direction)

static bool	IsStreamlineTooCloseToOthers (void clientdata, vtkPoints points, vtkDataArray *velocity, int direction)

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

Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Protected Attributes
double	StartPosition [3]

double	TerminalSpeed

double	InitialIntegrationStep

double	SeparatingDistance

double	SeparatingDistanceArcLength

double	SeparatingDistanceRatio

double	ClosedLoopMaximumDistance

double	ClosedLoopMaximumDistanceArcLength

double	LoopAngle

int	IntegrationStepUnit

vtkIdType	MaximumNumberOfSteps

vtkIdType	MinimumNumberOfStreamlinePoints

vtkIdType	MinimumNumberOfLoopPoints

vtkInitialValueProblemSolver *	Integrator

bool	ComputeVorticity

vtkAbstractInterpolatedVelocityField *	InterpolatorPrototype

vtkCompositeDataSet *	InputData

vtkImageData *	SuperposedGrid

std::vector< std::vector< std::array< double, 3 > > >	AllPoints

std::vector< std::vector< vtkIdType > >	CurrentPoints

std::vector< vtkIdType >	MinPointIds

vtkIdType	DirectionStart

int	PreviousDirection

vtkPolyDataCollection *	Streamlines

Protected Attributes inherited from vtkAlgorithm
vtkTimeStamp	LastAbortCheckTime

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.

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

std::string	ObjectName

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Public Attributes inherited from vtkAlgorithm
std::atomic< vtkTypeBool >	AbortExecute

Static Protected Attributes inherited from vtkAlgorithm
static vtkTimeStamp	LastAbortTime

static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

Evenly spaced streamline generator for 2D.

vtkEvenlySpacedStreamlines2D is a filter that integrates a 2D vector field to generate evenly-spaced streamlines.

We implement the algorithm described in: Jobard, Bruno, and Wilfrid Lefer. "Creating evenly-spaced streamlines of arbitrary density." Visualization in Scientific Computing '97. Springer Vienna, 1997. 43-55. The loop detection is described in: Liu, Zhanping, Robert Moorhead, and Joe Groner. "An advanced evenly-spaced streamline placement algorithm." IEEE Transactions on Visualization and Computer Graphics 12.5 (2006): 965-972.

The integration is performed using a specified integrator, by default Runge-Kutta2.

vtkEvenlySpacedStreamlines2D produces polylines as the output, with each cell (i.e., polyline) representing a streamline. The attribute values associated with each streamline are stored in the cell data, whereas those associated with streamline-points are stored in the point data.

vtkEvenlySpacedStreamlines2D integrates streamlines both forward and backward. The integration for a streamline terminates upon exiting the flow field domain, or if the particle speed is reduced to a value less than a specified terminal speed, if the current streamline gets too close to other streamlines (vtkStreamTracer::FIXED_REASONS_FOR_TERMINATION_COUNT + 1) or if the streamline forms a loop (vtkStreamTracer::FIXED_REASONS_FOR_TERMINATION_COUNT). The specific reason for the termination is stored in a cell array named ReasonForTermination.

Note that normalized vectors are adopted in streamline integration, which achieves high numerical accuracy/smoothness of flow lines that is particularly guaranteed for Runge-Kutta45 with adaptive step size and error control). In support of this feature, the underlying step size is ALWAYS in arc length unit (LENGTH_UNIT) while the 'real' time interval (virtual for steady flows) that a particle actually takes to trave in a single step is obtained by dividing the arc length by the LOCAL speed. The overall elapsed time (i.e., the life span) of the particle is the sum of those individual step-wise time intervals.

The quality of streamline integration can be controlled by setting the initial integration step (InitialIntegrationStep), particularly for Runge-Kutta2 and Runge-Kutta4 (with a fixed step size). We do not support Runge-Kutta45 (with an adaptive step size and error control) because a requirement of the algorithm is that sample points along a streamline be evenly spaced. These steps are in either LENGTH_UNIT or CELL_LENGTH_UNIT.

The integration time, vorticity, rotation and angular velocity are stored in point data arrays named "IntegrationTime", "Vorticity", "Rotation" and "AngularVelocity", respectively (vorticity, rotation and angular velocity are computed only when ComputeVorticity is on). All point data attributes in the source dataset are interpolated on the new streamline points.

vtkEvenlySpacedStreamlines2D supports integration through any type of 2D dataset.

The starting point, or the so-called 'seed', of the first streamline is set by setting StartPosition

See also: vtkStreamTracer vtkRibbonFilter vtkRuledSurfaceFilter vtkInitialValueProblemSolver vtkRungeKutta2 vtkRungeKutta4 vtkRungeKutta45 vtkParticleTracerBase vtkParticleTracer vtkParticlePathFilter vtkStreaklineFilter vtkAbstractInterpolatedVelocityField vtkCompositeInterpolatedVelocityField vtkAMRInterpolatedVelocityField

Tests:: vtkEvenlySpacedStreamlines2D (Tests)

Definition at line 104 of file vtkEvenlySpacedStreamlines2D.h.

Member Typedef Documentation

◆ Superclass

typedef vtkPolyDataAlgorithm vtkEvenlySpacedStreamlines2D::Superclass

Definition at line 107 of file vtkEvenlySpacedStreamlines2D.h.

Member Enumeration Documentation

◆ DistanceType

enum vtkEvenlySpacedStreamlines2D::DistanceType

protected

Do we test for separating distance or a ratio of the separating distance.

Enumerator
DISTANCE
DISTANCE_RATIO

Definition at line 276 of file vtkEvenlySpacedStreamlines2D.h.

Constructor & Destructor Documentation

◆ vtkEvenlySpacedStreamlines2D()

vtkEvenlySpacedStreamlines2D::vtkEvenlySpacedStreamlines2D ( )

protected

◆ ~vtkEvenlySpacedStreamlines2D()

vtkEvenlySpacedStreamlines2D::~vtkEvenlySpacedStreamlines2D ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkEvenlySpacedStreamlines2D::IsTypeOf ( const char * type )

static

◆ IsA()

virtual vtkTypeBool vtkEvenlySpacedStreamlines2D::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 vtkPolyDataAlgorithm.

◆ SafeDownCast()

static vtkEvenlySpacedStreamlines2D * vtkEvenlySpacedStreamlines2D::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkEvenlySpacedStreamlines2D::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkPolyDataAlgorithm.

◆ NewInstance()

vtkEvenlySpacedStreamlines2D * vtkEvenlySpacedStreamlines2D::NewInstance ( ) const

◆ PrintSelf()

void vtkEvenlySpacedStreamlines2D::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 vtkAlgorithm.

◆ New()

static vtkEvenlySpacedStreamlines2D * vtkEvenlySpacedStreamlines2D::New ( )

static

Construct object to start from position (0,0,0), with forward integration, terminal speed 1.0E-12, vorticity computation on, integration step size 0.5 (in cell length unit), maximum number of steps 2000, using Runge-Kutta2, and maximum propagation 1.0 (in arc length unit).

◆ SetStartPosition() [1/2]

virtual void vtkEvenlySpacedStreamlines2D::SetStartPosition	(	double	,
		double	,
		double
	)

virtual

Specify the starting point (seed) of the first streamline in the global coordinate system.

Search must be performed to find the initial cell from which to start integration. If the seed is not specified a random position in the input data is chosen.

◆ SetStartPosition() [2/2]

virtual void vtkEvenlySpacedStreamlines2D::SetStartPosition ( double [3] )

virtual

Specify the starting point (seed) of the first streamline in the global coordinate system.

Search must be performed to find the initial cell from which to start integration. If the seed is not specified a random position in the input data is chosen.

◆ GetStartPosition() [1/3]

virtual double * vtkEvenlySpacedStreamlines2D::GetStartPosition ( )

virtual

Specify the starting point (seed) of the first streamline in the global coordinate system.

Search must be performed to find the initial cell from which to start integration. If the seed is not specified a random position in the input data is chosen.

◆ GetStartPosition() [2/3]

virtual void vtkEvenlySpacedStreamlines2D::GetStartPosition	(	double &	,
		double &	,
		double &
	)

virtual

Specify the starting point (seed) of the first streamline in the global coordinate system.

Search must be performed to find the initial cell from which to start integration. If the seed is not specified a random position in the input data is chosen.

◆ GetStartPosition() [3/3]

virtual void vtkEvenlySpacedStreamlines2D::GetStartPosition ( double [3] )

virtual

Specify the starting point (seed) of the first streamline in the global coordinate system.

Search must be performed to find the initial cell from which to start integration. If the seed is not specified a random position in the input data is chosen.