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vtkKochanekSpline Class Reference

computes an interpolating spline using a Kochanek basis. More...

#include <vtkKochanekSpline.h>

Inheritance diagram for vtkKochanekSpline:
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Collaboration diagram for vtkKochanekSpline:
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Public Types

typedef vtkSpline Superclass
 
- Public Types inherited from vtkSpline
typedef vtkObject Superclass
 

Public Member Functions

virtual int IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class. More...
 
vtkKochanekSplineNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
void Compute () override
 Compute Kochanek Spline coefficients. More...
 
double Evaluate (double t) override
 Evaluate a 1D Kochanek spline. More...
 
void DeepCopy (vtkSpline *s) override
 Deep copy of cardinal spline data. More...
 
virtual void SetDefaultBias (double)
 Set the bias for all points. More...
 
virtual double GetDefaultBias ()
 Set the bias for all points. More...
 
virtual void SetDefaultTension (double)
 Set the tension for all points. More...
 
virtual double GetDefaultTension ()
 Set the tension for all points. More...
 
virtual void SetDefaultContinuity (double)
 Set the continuity for all points. More...
 
virtual double GetDefaultContinuity ()
 Set the continuity for all points. More...
 
- Public Member Functions inherited from vtkSpline
vtkSplineNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
int GetNumberOfPoints ()
 Return the number of points inserted thus far. More...
 
void AddPoint (double t, double x)
 Add a pair of points to be fit with the spline. More...
 
void RemovePoint (double t)
 Remove a point from the data to be fit with the spline. More...
 
void RemoveAllPoints ()
 Remove all points from the data. More...
 
vtkMTimeType GetMTime () override
 Return the MTime also considering the Piecewise function. More...
 
void SetParametricRange (double tMin, double tMax)
 Set/Get the parametric range. More...
 
void SetParametricRange (double tRange[2])
 Set/Get the parametric range. More...
 
void GetParametricRange (double tRange[2]) const
 Set/Get the parametric range. More...
 
virtual void SetClampValue (int)
 Set/Get ClampValue. More...
 
virtual int GetClampValue ()
 Set/Get ClampValue. More...
 
virtual void ClampValueOn ()
 Set/Get ClampValue. More...
 
virtual void ClampValueOff ()
 Set/Get ClampValue. More...
 
virtual void SetClosed (int)
 Control whether the spline is open or closed. More...
 
virtual int GetClosed ()
 Control whether the spline is open or closed. More...
 
virtual void ClosedOn ()
 Control whether the spline is open or closed. More...
 
virtual void ClosedOff ()
 Control whether the spline is open or closed. More...
 
virtual void SetLeftConstraint (int)
 Set the type of constraint of the left(right) end points. More...
 
virtual int GetLeftConstraint ()
 Set the type of constraint of the left(right) end points. More...
 
virtual void SetRightConstraint (int)
 Set the type of constraint of the left(right) end points. More...
 
virtual int GetRightConstraint ()
 Set the type of constraint of the left(right) end points. More...
 
virtual void SetLeftValue (double)
 The values of the derivative on the left and right sides. More...
 
virtual double GetLeftValue ()
 The values of the derivative on the left and right sides. More...
 
virtual void SetRightValue (double)
 The values of the derivative on the left and right sides. More...
 
virtual double GetRightValue ()
 The values of the derivative on the left and right sides. More...
 
- Public Member Functions inherited from vtkObject
 vtkBaseTypeMacro (vtkObject, vtkObjectBase)
 
virtual void DebugOn ()
 Turn debugging output on. More...
 
virtual void DebugOff ()
 Turn debugging output off. More...
 
bool GetDebug ()
 Get the value of the debug flag. More...
 
void SetDebug (bool debugFlag)
 Set the value of the debug flag. More...
 
virtual void Modified ()
 Update the modification time for this object. More...
 
void RemoveObserver (unsigned long tag)
 
void RemoveObservers (unsigned long event)
 
void RemoveObservers (const char *event)
 
void RemoveAllObservers ()
 
int HasObserver (unsigned long event)
 
int 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...
 
vtkCommandGetCommand (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...
 
int HasObserver (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
int 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 int IsTypeOf (const char *type)
 
static vtkKochanekSplineSafeDownCast (vtkObjectBase *o)
 
static vtkKochanekSplineNew ()
 Construct a KochanekSpline with the following defaults: DefaultBias = 0, DefaultTension = 0, DefaultContinuity = 0. More...
 
- Static Public Member Functions inherited from vtkSpline
static int IsTypeOf (const char *type)
 
static vtkSplineSafeDownCast (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 ()
 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 vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkKochanekSpline ()
 
 ~vtkKochanekSpline () override
 
void Fit1D (int n, double *x, double *y, double tension, double bias, double continuity, double coefficients[][4], int leftConstraint, double leftValue, int rightConstraint, double rightValue)
 
- Protected Member Functions inherited from vtkSpline
 vtkSpline ()
 
 ~vtkSpline () override
 
double ComputeLeftDerivative ()
 
double ComputeRightDerivative ()
 
int FindIndex (int size, double t)
 
- 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

double DefaultBias
 
double DefaultTension
 
double DefaultContinuity
 
- Protected Attributes inherited from vtkSpline
vtkMTimeType ComputeTime
 
int ClampValue
 
doubleIntervals
 
doubleCoefficients
 
int LeftConstraint
 
double LeftValue
 
int RightConstraint
 
double RightValue
 
vtkPiecewiseFunctionPiecewiseFunction
 
int Closed
 
double ParametricRange [2]
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
- Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32 ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

Detailed Description

computes an interpolating spline using a Kochanek basis.

Implements the Kochanek interpolating spline described in: Kochanek, D., Bartels, R., "Interpolating Splines with Local Tension, Continuity, and Bias Control," Computer Graphics, vol. 18, no. 3, pp. 33-41, July 1984. These splines give the user more control over the shape of the curve than the cardinal splines implemented in vtkCardinalSpline. Three parameters can be specified. All have a range from -1 to 1.

Tension controls how sharply the curve bends at an input point. A value of -1 produces more slack in the curve. A value of 1 tightens the curve.

Continuity controls the continuity of the first derivative at input points.

Bias controls the direction of the curve at it passes through an input point. A value of -1 undershoots the point while a value of 1 overshoots the point.

These three parameters give the user broad control over the shape of the interpolating spline. The original Kochanek paper describes the effects nicely and is recommended reading.

See also
vtkSpline vtkCardinalSpline
Examples:
vtkKochanekSpline (Examples)
Tests:
vtkKochanekSpline (Tests)

Definition at line 57 of file vtkKochanekSpline.h.

Member Typedef Documentation

Definition at line 60 of file vtkKochanekSpline.h.

Constructor & Destructor Documentation

vtkKochanekSpline::vtkKochanekSpline ( )
protected
vtkKochanekSpline::~vtkKochanekSpline ( )
inlineoverrideprotected

Definition at line 110 of file vtkKochanekSpline.h.

Member Function Documentation

static int vtkKochanekSpline::IsTypeOf ( const char *  type)
static
virtual int vtkKochanekSpline::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 vtkSpline.

static vtkKochanekSpline* vtkKochanekSpline::SafeDownCast ( vtkObjectBase o)
static
virtual vtkObjectBase* vtkKochanekSpline::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkSpline.

vtkKochanekSpline* vtkKochanekSpline::NewInstance ( ) const
void vtkKochanekSpline::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 vtkObjectBase.

static vtkKochanekSpline* vtkKochanekSpline::New ( )
static

Construct a KochanekSpline with the following defaults: DefaultBias = 0, DefaultTension = 0, DefaultContinuity = 0.

void vtkKochanekSpline::Compute ( )
overridevirtual

Compute Kochanek Spline coefficients.

Implements vtkSpline.

double vtkKochanekSpline::Evaluate ( double  t)
overridevirtual

Evaluate a 1D Kochanek spline.

Implements vtkSpline.

virtual void vtkKochanekSpline::SetDefaultBias ( double  )
virtual

Set the bias for all points.

Default is 0.

virtual double vtkKochanekSpline::GetDefaultBias ( )
virtual

Set the bias for all points.

Default is 0.

virtual void vtkKochanekSpline::SetDefaultTension ( double  )
virtual

Set the tension for all points.

Default is 0.

virtual double vtkKochanekSpline::GetDefaultTension ( )
virtual

Set the tension for all points.

Default is 0.

virtual void vtkKochanekSpline::SetDefaultContinuity ( double  )
virtual

Set the continuity for all points.

Default is 0.

virtual double vtkKochanekSpline::GetDefaultContinuity ( )
virtual

Set the continuity for all points.

Default is 0.

void vtkKochanekSpline::DeepCopy ( vtkSpline s)
overridevirtual

Deep copy of cardinal spline data.

Reimplemented from vtkSpline.

void vtkKochanekSpline::Fit1D ( int  n,
double x,
double y,
double  tension,
double  bias,
double  continuity,
double  coefficients[][4],
int  leftConstraint,
double  leftValue,
int  rightConstraint,
double  rightValue 
)
protected

Member Data Documentation

double vtkKochanekSpline::DefaultBias
protected

Definition at line 116 of file vtkKochanekSpline.h.

double vtkKochanekSpline::DefaultTension
protected

Definition at line 117 of file vtkKochanekSpline.h.

double vtkKochanekSpline::DefaultContinuity
protected

Definition at line 118 of file vtkKochanekSpline.h.


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