Interface for obtaining interpolated velocity values. More...

#include <vtkGenericInterpolatedVelocityField.h>

Inheritance diagram for vtkGenericInterpolatedVelocityField:

Collaboration diagram for vtkGenericInterpolatedVelocityField:

Public Types
typedef vtkFunctionSet	Superclass

Public Types inherited from vtkFunctionSet
typedef vtkObject	Superclass

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

vtkGenericInterpolatedVelocityField *	NewInstance () const

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

int	FunctionValues (double x, double f) override
	Evaluate the velocity field, f, at (x, y, z, t). More...

virtual void	AddDataSet (vtkGenericDataSet *dataset)
	Add a dataset used for the implicit function evaluation. More...

void	ClearLastCell ()
	Set the last cell id to -1 so that the next search does not start from the previous cell. More...

vtkGenericAdaptorCell *	GetLastCell ()
	Return the cell cached from last evaluation. More...

int	GetLastLocalCoordinates (double pcoords[3])
	Returns the interpolation weights cached from last evaluation if the cached cell is valid (returns 1). More...

virtual void	CopyParameters (vtkGenericInterpolatedVelocityField *from)
	Copy the user set parameters from source. More...


virtual vtkTypeBool	GetCaching ()
	Turn caching on/off. More...

virtual void	SetCaching (vtkTypeBool)
	Turn caching on/off. More...

virtual void	CachingOn ()
	Turn caching on/off. More...

virtual void	CachingOff ()
	Turn caching on/off. More...


virtual int	GetCacheHit ()
	Caching statistics. More...

virtual int	GetCacheMiss ()
	Caching statistics. More...


virtual char *	GetVectorsSelection ()
	If you want to work with an arbitrary vector array, then set its name here. More...

void	SelectVectors (const char *fieldName)
	If you want to work with an arbitrary vector array, then set its name here. More...


virtual vtkGenericDataSet *	GetLastDataSet ()
	Returns the last dataset that was visited. More...

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

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

virtual int	GetNumberOfFunctions ()
	Return the number of functions. More...

virtual int	GetNumberOfIndependentVariables ()
	Return the number of independent variables. More...

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

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

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

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

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

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

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

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

void	InitializeObjectBase ()

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

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

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

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

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

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

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

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

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

static vtkGenericInterpolatedVelocityField *	SafeDownCast (vtkObjectBase *o)

static vtkGenericInterpolatedVelocityField *	New ()
	Construct a vtkGenericInterpolatedVelocityField with no initial data set. More...

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

static vtkFunctionSet *	SafeDownCast (vtkObjectBase *o)

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

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

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

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

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

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

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

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

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkGenericInterpolatedVelocityField ()

	~vtkGenericInterpolatedVelocityField () override

virtual void	SetVectorsSelection (const char *)

int	FunctionValues (vtkGenericDataSet ds, double x, double *f)

Protected Member Functions inherited from vtkFunctionSet
	vtkFunctionSet ()

	~vtkFunctionSet () override

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 &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
vtkGenericCellIterator *	GenCell

double	LastPCoords [3]

int	CacheHit

int	CacheMiss

vtkTypeBool	Caching

vtkGenericDataSet *	LastDataSet

char *	VectorsSelection

vtkGenericInterpolatedVelocityFieldDataSetsType *	DataSets

Protected Attributes inherited from vtkFunctionSet
int	NumFuncs

int	NumIndepVars

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Static Protected Attributes
static const double	TOLERANCE_SCALE

Detailed Description

Interface for obtaining interpolated velocity values.

vtkGenericInterpolatedVelocityField acts as a continuous velocity field by performing cell interpolation on the underlying vtkDataSet. This is a concrete sub-class of vtkFunctionSet with NumberOfIndependentVariables = 4 (x,y,z,t) and NumberOfFunctions = 3 (u,v,w). Normally, every time an evaluation is performed, the cell which contains the point (x,y,z) has to be found by calling FindCell. This is a computationally expansive operation. In certain cases, the cell search can be avoided or shortened by providing a guess for the cell iterator. For example, in streamline integration, the next evaluation is usually in the same or a neighbour cell. For this reason, vtkGenericInterpolatedVelocityField stores the last cell iterator. If caching is turned on, it uses this iterator as the starting point.

Warning: vtkGenericInterpolatedVelocityField is not thread safe. A new instance should be created by each thread.

See also: vtkFunctionSet vtkGenericStreamTracer

Definition at line 54 of file vtkGenericInterpolatedVelocityField.h.

Member Typedef Documentation

typedef vtkFunctionSet vtkGenericInterpolatedVelocityField::Superclass

Definition at line 57 of file vtkGenericInterpolatedVelocityField.h.

Constructor & Destructor Documentation

vtkGenericInterpolatedVelocityField::vtkGenericInterpolatedVelocityField ( )

protected

vtkGenericInterpolatedVelocityField::~vtkGenericInterpolatedVelocityField ( )

overrideprotected

Member Function Documentation

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

static

virtual vtkTypeBool vtkGenericInterpolatedVelocityField::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 vtkFunctionSet.

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

static

virtual vtkObjectBase* vtkGenericInterpolatedVelocityField::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkFunctionSet.

vtkGenericInterpolatedVelocityField* vtkGenericInterpolatedVelocityField::NewInstance ( ) const

void vtkGenericInterpolatedVelocityField::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 vtkObject.

static vtkGenericInterpolatedVelocityField* vtkGenericInterpolatedVelocityField::New ( )

static

Construct a vtkGenericInterpolatedVelocityField with no initial data set.

Caching is on. LastCellId is set to -1.

int vtkGenericInterpolatedVelocityField::FunctionValues	(	double *	x,
		double *	f
	)

overridevirtual

Evaluate the velocity field, f, at (x, y, z, t).

For now, t is ignored.

Implements vtkFunctionSet.

virtual void vtkGenericInterpolatedVelocityField::AddDataSet ( vtkGenericDataSet * dataset )

virtual

Add a dataset used for the implicit function evaluation.

If more than one dataset is added, the evaluation point is searched in all until a match is found. THIS FUNCTION DOES NOT CHANGE THE REFERENCE COUNT OF dataset FOR THREAD SAFETY REASONS.

void vtkGenericInterpolatedVelocityField::ClearLastCell ( )

Set the last cell id to -1 so that the next search does not start from the previous cell.

vtkGenericAdaptorCell* vtkGenericInterpolatedVelocityField::GetLastCell ( )

Return the cell cached from last evaluation.

int vtkGenericInterpolatedVelocityField::GetLastLocalCoordinates ( double pcoords[3] )

Returns the interpolation weights cached from last evaluation if the cached cell is valid (returns 1).

Otherwise, it does not change w and returns 0.

virtual vtkTypeBool vtkGenericInterpolatedVelocityField::GetCaching ( )

virtual

Turn caching on/off.

virtual void vtkGenericInterpolatedVelocityField::SetCaching ( vtkTypeBool )

virtual

Turn caching on/off.

virtual void vtkGenericInterpolatedVelocityField::CachingOn ( )

virtual

Turn caching on/off.

virtual void vtkGenericInterpolatedVelocityField::CachingOff ( )

virtual

Turn caching on/off.

virtual int vtkGenericInterpolatedVelocityField::GetCacheHit ( )

virtual

Caching statistics.

virtual int vtkGenericInterpolatedVelocityField::GetCacheMiss ( )

virtual

Caching statistics.

virtual char* vtkGenericInterpolatedVelocityField::GetVectorsSelection ( )

virtual

If you want to work with an arbitrary vector array, then set its name here.

By default this in nullptr and the filter will use the active vector array.

void vtkGenericInterpolatedVelocityField::SelectVectors ( const char * fieldName )

inline

If you want to work with an arbitrary vector array, then set its name here.

By default this in nullptr and the filter will use the active vector array.

Definition at line 123 of file vtkGenericInterpolatedVelocityField.h.

virtual vtkGenericDataSet* vtkGenericInterpolatedVelocityField::GetLastDataSet ( )

virtual

Returns the last dataset that was visited.

Can be used as a first guess as to where the next point will be as well as to avoid searching through all datasets to get more information about the point.

virtual void vtkGenericInterpolatedVelocityField::CopyParameters ( vtkGenericInterpolatedVelocityField * from )

virtual

Copy the user set parameters from source.

This copies the Caching parameters. Sub-classes can add more after chaining.

virtual void vtkGenericInterpolatedVelocityField::SetVectorsSelection ( const char * )

protectedvirtual