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vtkShepardKernel Class Reference

a Shepard method interpolation kernel More...

#include <vtkShepardKernel.h>

Inheritance diagram for vtkShepardKernel:
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Collaboration diagram for vtkShepardKernel:
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Public Types

typedef vtkGeneralizedKernel Superclass
 
- 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. More...
 

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...
 
vtkShepardKernelNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
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. More...
 
virtual void SetPowerParameter (double)
 Set / Get the power parameter p. More...
 
virtual double GetPowerParameter ()
 
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. More...
 
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. More...
 
- Public Member Functions inherited from vtkGeneralizedKernel
vtkGeneralizedKernelNewInstance () const
 
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. More...
 
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. More...
 
virtual void SetKernelFootprint (int)
 Specify the interpolation basis style. More...
 
virtual int GetKernelFootprint ()
 
void SetKernelFootprintToRadius ()
 
void SetKernelFootprintToNClosest ()
 
virtual void SetRadius (double)
 If the interpolation basis style is Radius, then this method specifies the radius within which the basis points must lie. More...
 
virtual double GetRadius ()
 
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. More...
 
virtual int GetNumberOfPoints ()
 
virtual void SetNormalizeWeights (bool)
 Indicate whether the interpolation weights should be normalized after they are computed. More...
 
virtual bool GetNormalizeWeights ()
 
virtual void NormalizeWeightsOn ()
 
virtual void NormalizeWeightsOff ()
 
- Public Member Functions inherited from vtkInterpolationKernel
 vtkAbstractTypeMacro (vtkInterpolationKernel, vtkObject)
 Standard method for type and printing. More...
 
virtual void Initialize (vtkAbstractPointLocator *loc, vtkDataSet *ds, vtkPointData *pd)
 Initialize the kernel. More...
 
virtual void SetRequiresInitialization (bool)
 Indicate whether the kernel needs initialization. More...
 
virtual bool GetRequiresInitialization ()
 
virtual void RequiresInitializationOn ()
 
virtual void RequiresInitializationOff ()
 
- 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...
 
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)
 
vtkCommandGetCommand (unsigned long tag)
 
void RemoveObserver (vtkCommand *)
 
void RemoveObservers (unsigned long event, vtkCommand *)
 
void RemoveObservers (const char *event, vtkCommand *)
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 
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)
 
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)
 
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)
 
int InvokeEvent (unsigned long event)
 
int InvokeEvent (const char *event)
 
- 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 PrintHeader (ostream &os, vtkIndent indent)
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 
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...
 

Static Public Member Functions

static vtkShepardKernelNew ()
 Standard methods for instantiation, obtaining type information, and printing. More...
 
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkShepardKernelSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkGeneralizedKernel
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkGeneralizedKernelSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 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 ()
 
static void GlobalWarningDisplayOff ()
 
static int GetGlobalWarningDisplay ()
 
- 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 vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 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. More...
 
void InternalReleaseFocus ()
 
- 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

double PowerParameter
 
- Protected Attributes inherited from vtkGeneralizedKernel
int KernelFootprint
 
double Radius
 
int NumberOfPoints
 
bool NormalizeWeights
 
- Protected Attributes inherited from vtkInterpolationKernel
bool RequiresInitialization
 
vtkAbstractPointLocatorLocator
 
vtkDataSetDataSet
 
vtkPointDataPointData
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
- Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

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

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

◆ IsA()

virtual vtkTypeBool vtkShepardKernel::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 vtkGeneralizedKernel.

◆ SafeDownCast()

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

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkShepardKernel::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkGeneralizedKernel.

◆ NewInstance()

vtkShepardKernel* vtkShepardKernel::NewInstance ( ) const

◆ PrintSelf()

void vtkShepardKernel::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 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

◆ ComputeWeights() [2/3]

virtual vtkIdType vtkGeneralizedKernel::ComputeWeights

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.

◆ ComputeWeights() [3/3]

vtkIdType vtkGeneralizedKernel::ComputeWeights
inlineoverride

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.

Definition at line 118 of file vtkGeneralizedKernel.h.

Member Data Documentation

◆ PowerParameter

double vtkShepardKernel::PowerParameter
protected

Definition at line 90 of file vtkShepardKernel.h.


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