vtkShepardKernel Class Reference

a Shepard method interpolation kernel More...

#include <vtkShepardKernel.h>

Inheritance diagram for vtkShepardKernel:

Collaboration diagram for vtkShepardKernel:

Public Member Functions
vtkIdType	ComputeWeights (double x[3], vtkIdList *pIds, vtkDoubleArray *prob, vtkDoubleArray *weights) override
	Given a point x, a list of basis points pIds, and a probability weighting function prob, compute interpolation weights associated with these basis points.
virtual vtkIdType	ComputeWeights (double x[3], vtkIdList *pIds, vtkDoubleArray *prob, vtkDoubleArray *weights)=0
	Given a point x, a list of basis points pIds, and a probability weighting function prob, compute interpolation weights associated with these basis points.
vtkIdType	ComputeWeights (double x[3], vtkIdList *pIds, vtkDoubleArray *weights) override
	Given a point x, and a list of basis points pIds, compute interpolation weights associated with these basis points.
virtual void	SetPowerParameter (double)
	Set / Get the power parameter p.
virtual double	GetPowerParameter ()
	Set / Get the power parameter p.
Public Member Functions inherited from vtkGeneralizedKernel
vtkIdType	ComputeBasis (double x[3], vtkIdList *pIds, vtkIdType ptId=0) override
	Based on the kernel style, invoke the appropriate locator method to obtain the points making up the basis.
virtual vtkIdType	ComputeWeights (double x[3], vtkIdList *pIds, vtkDoubleArray *prob, vtkDoubleArray *weights)=0
	Given a point x, a list of basis points pIds, and a probability weighting function prob, compute interpolation weights associated with these basis points.
vtkIdType	ComputeWeights (double x[3], vtkIdList *pIds, vtkDoubleArray *weights) override
	Given a point x, and a list of basis points pIds, compute interpolation weights associated with these basis points.
virtual void	SetKernelFootprint (int)
	Specify the interpolation basis style.
virtual int	GetKernelFootprint ()
	Specify the interpolation basis style.
void	SetKernelFootprintToRadius ()
	Specify the interpolation basis style.
void	SetKernelFootprintToNClosest ()
	Specify the interpolation basis style.
virtual void	SetRadius (double)
	If the interpolation basis style is Radius, then this method specifies the radius within which the basis points must lie.
virtual double	GetRadius ()
	If the interpolation basis style is Radius, then this method specifies the radius within which the basis points must lie.
virtual void	SetNumberOfPoints (int)
	If the interpolation basis style is NClosest, then this method specifies the number of the closest points used to form the interpolation basis.
virtual int	GetNumberOfPoints ()
	If the interpolation basis style is NClosest, then this method specifies the number of the closest points used to form the interpolation basis.
virtual void	SetNormalizeWeights (bool)
	Indicate whether the interpolation weights should be normalized after they are computed.
virtual bool	GetNormalizeWeights ()
	Indicate whether the interpolation weights should be normalized after they are computed.
virtual void	NormalizeWeightsOn ()
	Indicate whether the interpolation weights should be normalized after they are computed.
virtual void	NormalizeWeightsOff ()
	Indicate whether the interpolation weights should be normalized after they are computed.
vtkGeneralizedKernel *	NewInstance () const
	Standard methods for type and printing.
Public Member Functions inherited from vtkInterpolationKernel
virtual void	Initialize (vtkAbstractPointLocator *loc, vtkDataSet *ds, vtkPointData *pd)
	Initialize the kernel.
virtual vtkIdType	ComputeBasis (double x[3], vtkIdList *pIds, vtkIdType ptId=0)=0
	Given a point x (and optional associated point id), determine the points around x which form an interpolation basis.
virtual vtkIdType	ComputeWeights (double x[3], vtkIdList *pIds, vtkDoubleArray *weights)=0
	Given a point x, and a list of basis points pIds, compute interpolation weights associated with these basis points.
	vtkAbstractTypeMacro (vtkInterpolationKernel, vtkObject)
	Standard method for type and printing.
virtual void	SetRequiresInitialization (bool)
	Indicate whether the kernel needs initialization.
virtual bool	GetRequiresInitialization ()
	Indicate whether the kernel needs initialization.
virtual void	RequiresInitializationOn ()
	Indicate whether the kernel needs initialization.
virtual void	RequiresInitializationOff ()
	Indicate whether the kernel needs initialization.
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)
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.
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.
int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
int	InvokeEvent (const char *event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.
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.
virtual 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.

Protected Member Functions
	vtkShepardKernel ()
	~vtkShepardKernel () override
Protected Member Functions inherited from vtkGeneralizedKernel
	vtkGeneralizedKernel ()
	~vtkGeneralizedKernel () override
Protected Member Functions inherited from vtkInterpolationKernel
	vtkInterpolationKernel ()
	~vtkInterpolationKernel () override
virtual void	FreeStructures ()
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 *)
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Protected Attributes
double	PowerParameter
Protected Attributes inherited from vtkGeneralizedKernel
int	KernelFootprint
double	Radius
int	NumberOfPoints
bool	NormalizeWeights
Protected Attributes inherited from vtkInterpolationKernel
bool	RequiresInitialization
vtkAbstractPointLocator *	Locator
vtkDataSet *	DataSet
vtkPointData *	PointData
Protected Attributes inherited from vtkObject
bool	Debug
vtkTimeStamp	MTime
vtkSubjectHelper *	SubjectHelper
Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount
vtkWeakPointerBase **	WeakPointers
typedef vtkGeneralizedKernel	Superclass
	Standard methods for instantiation, obtaining type information, and printing.
static vtkShepardKernel *	New ()
	Standard methods for instantiation, obtaining type information, and printing.
static vtkTypeBool	IsTypeOf (const char *type)
	Standard methods for instantiation, obtaining type information, and printing.
static vtkShepardKernel *	SafeDownCast (vtkObjectBase *o)
	Standard methods for instantiation, obtaining type information, and printing.
virtual vtkTypeBool	IsA (const char *type)
	Standard methods for instantiation, obtaining type information, and printing.
vtkShepardKernel *	NewInstance () const
	Standard methods for instantiation, obtaining type information, and printing.
void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard methods for instantiation, obtaining type information, and printing.
virtual vtkObjectBase *	NewInstanceInternal () const
	Standard methods for instantiation, obtaining type information, and printing.

Additional Inherited Members
Public Types inherited from vtkGeneralizedKernel
enum	KernelStyle { RADIUS = 0 , N_CLOSEST = 1 }
	Enum used to select the interpolation basis form. More...
typedef vtkInterpolationKernel	Superclass
	Standard methods for type and printing.
Static Public Member Functions inherited from vtkGeneralizedKernel
static vtkTypeBool	IsTypeOf (const char *type)
	Standard methods for type and printing.
static vtkGeneralizedKernel *	SafeDownCast (vtkObjectBase *o)
	Standard methods for type and printing.
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 (int 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 int	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.
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()
static vtkReallocingFunction	GetCurrentReallocFunction ()
static vtkFreeingFunction	GetCurrentFreeFunction ()
static vtkFreeingFunction	GetAlternateFreeFunction ()

Detailed Description

a Shepard method interpolation kernel

vtkShepardKernel is an interpolation kernel that uses the method of Shepard to perform interpolation. The weights are computed as 1/r^p, where r is the distance to a neighbor point within the kernel radius R; and p (the power parameter) is a positive exponent (typically p=2).

Warning

The weights are normalized sp that SUM(Wi) = 1. If a neighbor point p precisely lies on the point to be interpolated, then the interpolated point takes on the values associated with p.

See also

vtkPointInterpolator vtkPointInterpolator2D vtkInterpolationKernel vtkGaussianKernel vtkSPHKernel vtkShepardKernel

Definition at line 44 of file vtkShepardKernel.h.

Member Typedef Documentation

Superclass

typedef vtkGeneralizedKernel vtkShepardKernel::Superclass

Standard methods for instantiation, obtaining type information, and printing.

Definition at line 52 of file vtkShepardKernel.h.

Constructor & Destructor Documentation

vtkShepardKernel()

vtkShepardKernel::vtkShepardKernel ( )

protected

~vtkShepardKernel()

vtkShepardKernel::~vtkShepardKernel ( )

overrideprotected

Member Function Documentation

New()

static vtkShepardKernel * vtkShepardKernel::New ( )

static

Standard methods for instantiation, obtaining type information, and printing.

IsTypeOf()

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

static

Standard methods for instantiation, obtaining type information, and printing.

IsA()

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

virtual

Standard methods for instantiation, obtaining type information, and printing.

Reimplemented from vtkGeneralizedKernel.

SafeDownCast()

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

static

Standard methods for instantiation, obtaining type information, and printing.

NewInstanceInternal()

virtual vtkObjectBase * vtkShepardKernel::NewInstanceInternal ( ) const

protectedvirtual

Standard methods for instantiation, obtaining type information, and printing.

Reimplemented from vtkGeneralizedKernel.

NewInstance()

vtkShepardKernel * vtkShepardKernel::NewInstance

(

)

const

Standard methods for instantiation, obtaining type information, and printing.

PrintSelf()

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

overridevirtual

Standard methods for instantiation, obtaining type information, and printing.

Reimplemented from vtkGeneralizedKernel.

ComputeWeights() [1/3]

vtkIdType vtkShepardKernel::ComputeWeights ( double  x[3], vtkIdList *  pIds, vtkDoubleArray *  prob, vtkDoubleArray *  weights  )

overridevirtual

Given a point x, a list of basis points pIds, and a probability weighting function prob, compute interpolation weights associated with these basis points.

Note that basis points list pIds, the probability weighting prob, and the weights array are provided by the caller of the method, and may be dynamically resized as necessary. The method returns the number of weights (pIds may be resized in some cases). Typically this method is called after ComputeBasis(), although advanced users can invoke ComputeWeights() and provide the interpolation basis points pIds directly. The probably weighting prob are numbers 0<=prob<=1 which are multiplied against the interpolation weights before normalization. They are estimates of local confidence of weights. The prob may be nullptr in which all probabilities are considered =1.

Implements vtkGeneralizedKernel.

SetPowerParameter()

virtual void vtkShepardKernel::SetPowerParameter ( double  )

virtual

Set / Get the power parameter p.

By default p=2. Values (which must be a positive, real value) != 2 may affect performance significantly.

GetPowerParameter()

virtual double vtkShepardKernel::GetPowerParameter ( )

virtual

Set / Get the power parameter p.

By default p=2. Values (which must be a positive, real value) != 2 may affect performance significantly.

ComputeWeights() [2/3]

virtual vtkIdType vtkGeneralizedKernel::ComputeWeights ( double  x[3], vtkIdList *  pIds, vtkDoubleArray *  prob, vtkDoubleArray *  weights  )

virtual

Given a point x, a list of basis points pIds, and a probability weighting function prob, compute interpolation weights associated with these basis points.

Note that basis points list pIds, the probability weighting prob, and the weights array are provided by the caller of the method, and may be dynamically resized as necessary. The method returns the number of weights (pIds may be resized in some cases). Typically this method is called after ComputeBasis(), although advanced users can invoke ComputeWeights() and provide the interpolation basis points pIds directly. The probably weighting prob are numbers 0<=prob<=1 which are multiplied against the interpolation weights before normalization. They are estimates of local confidence of weights. The prob may be nullptr in which all probabilities are considered =1.

Implements vtkGeneralizedKernel.

ComputeWeights() [3/3]

vtkIdType vtkGeneralizedKernel::ComputeWeights ( double  x[3], vtkIdList *  pIds, vtkDoubleArray *  weights  )

inlineoverridevirtual

Given a point x, and a list of basis points pIds, compute interpolation weights associated with these basis points.

Note that both the nearby basis points list pIds and the weights array are provided by the caller of the method, and may be dynamically resized as necessary. Typically this method is called after ComputeBasis(), although advanced users can invoke ComputeWeights() and provide the interpolation basis points pIds directly.

Reimplemented from vtkGeneralizedKernel.

Definition at line 118 of file vtkGeneralizedKernel.h.

Member Data Documentation

PowerParameter

double vtkShepardKernel::PowerParameter

protected

Definition at line 90 of file vtkShepardKernel.h.

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

• Filters/Points/vtkShepardKernel.h