interpolate a series of transformation matrices More...

#include <vtkTransformInterpolator.h>

Inheritance diagram for vtkTransformInterpolator:

Collaboration diagram for vtkTransformInterpolator:

Public Types
enum	{ INTERPOLATION_TYPE_LINEAR = 0 , INTERPOLATION_TYPE_SPLINE , INTERPOLATION_TYPE_MANUAL }
	Enums to control the type of interpolation to use. 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.

vtkTransformInterpolator *	NewInstance () const

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

int	GetNumberOfTransforms ()
	Return the number of transforms in the list of transforms.

void	Initialize ()
	Clear the list of transforms.

void	RemoveTransform (double t)
	Delete the transform at a particular parameter t.

void	InterpolateTransform (double t, vtkTransform *xform)
	Interpolate the list of transforms and determine a new transform (i.e., fill in the transformation provided).

vtkMTimeType	GetMTime () override
	Override GetMTime() because we depend on the interpolators which may be modified outside of this class.


double	GetMinimumT ()
	Obtain some information about the interpolation range.

double	GetMaximumT ()
	Obtain some information about the interpolation range.


void	AddTransform (double t, vtkTransform *xform)
	Add another transform to the list of transformations defining the transform function.

void	AddTransform (double t, vtkMatrix4x4 *matrix)
	Add another transform to the list of transformations defining the transform function.

void	AddTransform (double t, vtkProp3D *prop3D)
	Add another transform to the list of transformations defining the transform function.


virtual void	SetInterpolationType (int)
	These are convenience methods to switch between linear and spline interpolation.

virtual int	GetInterpolationType ()
	These are convenience methods to switch between linear and spline interpolation.

void	SetInterpolationTypeToLinear ()
	These are convenience methods to switch between linear and spline interpolation.

void	SetInterpolationTypeToSpline ()
	These are convenience methods to switch between linear and spline interpolation.

void	SetInterpolationTypeToManual ()
	These are convenience methods to switch between linear and spline interpolation.


virtual void	SetPositionInterpolator (vtkTupleInterpolator *)
	Set/Get the tuple interpolator used to interpolate the position portion of the transformation matrix.

virtual vtkTupleInterpolator *	GetPositionInterpolator ()
	Set/Get the tuple interpolator used to interpolate the position portion of the transformation matrix.


virtual void	SetScaleInterpolator (vtkTupleInterpolator *)
	Set/Get the tuple interpolator used to interpolate the scale portion of the transformation matrix.

virtual vtkTupleInterpolator *	GetScaleInterpolator ()
	Set/Get the tuple interpolator used to interpolate the scale portion of the transformation matrix.


virtual void	SetRotationInterpolator (vtkQuaternionInterpolator *)
	Set/Get the tuple interpolator used to interpolate the orientation portion of the transformation matrix.

virtual vtkQuaternionInterpolator *	GetRotationInterpolator ()
	Set/Get the tuple interpolator used to interpolate the orientation portion of the transformation matrix.

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.

virtual bool	UsesGarbageCollector () const
	Indicate whether the class uses `vtkGarbageCollector` or not.

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

static vtkTransformInterpolator *	SafeDownCast (vtkObjectBase *o)

static vtkTransformInterpolator *	New ()
	Instantiate the class.

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 Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkTransformInterpolator ()

	~vtkTransformInterpolator () override

void	InitializeInterpolation ()

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 &)

Protected Attributes
int	InterpolationType

vtkTupleInterpolator *	PositionInterpolator

vtkTupleInterpolator *	ScaleInterpolator

vtkQuaternionInterpolator *	RotationInterpolator

int	Initialized

vtkTimeStamp	InitializeTime

vtkTransformList *	TransformList

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

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Detailed Description

interpolate a series of transformation matrices

This class is used to interpolate a series of 4x4 transformation matrices. Position, scale and orientation (i.e., rotations) are interpolated separately, and can be interpolated linearly or with a spline function. Note that orientation is interpolated using quaternions via SLERP (spherical linear interpolation) or the special vtkQuaternionSpline class.

To use this class, specify at least two pairs of (t,transformation matrix) with the AddTransform() method. Then interpolated the transforms with the InterpolateTransform(t,transform) method, where "t" must be in the range of (min,max) times specified by the AddTransform() method.

By default, spline interpolation is used for the interpolation of the transformation matrices. The position, scale and orientation of the matrices are interpolated with instances of the classes vtkTupleInterpolator (position,scale) and vtkQuaternionInterpolator (rotation). The user can override the interpolation behavior by gaining access to these separate interpolation classes. These interpolator classes (vtkTupleInterpolator and vtkQuaternionInterpolator) can be modified to perform linear versus spline interpolation, and/or different spline basis functions can be specified.

Warning: The interpolator classes are initialized when the InterpolateTransform() is called. Any changes to the interpolators, or additions to the list of transforms to be interpolated, causes a reinitialization of the interpolators the next time InterpolateTransform() is invoked. Thus the best performance is obtained by 1) configuring the interpolators, 2) adding all the transforms, and 3) finally performing interpolation.

Tests:: vtkTransformInterpolator (Tests)

Definition at line 55 of file vtkTransformInterpolator.h.

Member Typedef Documentation

◆ Superclass

typedef vtkObject vtkTransformInterpolator::Superclass

Definition at line 58 of file vtkTransformInterpolator.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enums to control the type of interpolation to use.

Enumerator
INTERPOLATION_TYPE_LINEAR
INTERPOLATION_TYPE_SPLINE
INTERPOLATION_TYPE_MANUAL

Definition at line 116 of file vtkTransformInterpolator.h.

Constructor & Destructor Documentation

◆ vtkTransformInterpolator()

vtkTransformInterpolator::vtkTransformInterpolator ( )

protected

◆ ~vtkTransformInterpolator()

vtkTransformInterpolator::~vtkTransformInterpolator ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

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

static

◆ IsA()

virtual vtkTypeBool vtkTransformInterpolator::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 vtkObjectBase.

◆ SafeDownCast()

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

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkTransformInterpolator::NewInstanceInternal ( ) const

protectedvirtual

◆ NewInstance()

vtkTransformInterpolator * vtkTransformInterpolator::NewInstance ( ) const

◆ PrintSelf()

void vtkTransformInterpolator::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.

◆ New()

static vtkTransformInterpolator * vtkTransformInterpolator::New ( )

static

Instantiate the class.

◆ GetNumberOfTransforms()

int vtkTransformInterpolator::GetNumberOfTransforms ( )

Return the number of transforms in the list of transforms.

◆ GetMinimumT()

double vtkTransformInterpolator::GetMinimumT ( )

Obtain some information about the interpolation range.

The numbers returned (corresponding to parameter t, usually thought of as time) are undefined if the list of transforms is empty.

◆ GetMaximumT()

double vtkTransformInterpolator::GetMaximumT ( )

Obtain some information about the interpolation range.

The numbers returned (corresponding to parameter t, usually thought of as time) are undefined if the list of transforms is empty.

◆ Initialize()

void vtkTransformInterpolator::Initialize ( )

Clear the list of transforms.

◆ AddTransform() [1/3]

void vtkTransformInterpolator::AddTransform	(	double	t,
		vtkTransform *	xform
	)

Add another transform to the list of transformations defining the transform function.

Note that using the same time t value more than once replaces the previous transform value at t. At least two transforms must be added to define a function. There are variants to this method depending on whether you are adding a vtkTransform, vtkMaxtirx4x4, and/or vtkProp3D.

◆ AddTransform() [2/3]

void vtkTransformInterpolator::AddTransform	(	double	t,
		vtkMatrix4x4 *	matrix
	)

Add another transform to the list of transformations defining the transform function.

Note that using the same time t value more than once replaces the previous transform value at t. At least two transforms must be added to define a function. There are variants to this method depending on whether you are adding a vtkTransform, vtkMaxtirx4x4, and/or vtkProp3D.

◆ AddTransform() [3/3]

void vtkTransformInterpolator::AddTransform	(	double	t,
		vtkProp3D *	prop3D
	)

Add another transform to the list of transformations defining the transform function.

Note that using the same time t value more than once replaces the previous transform value at t. At least two transforms must be added to define a function. There are variants to this method depending on whether you are adding a vtkTransform, vtkMaxtirx4x4, and/or vtkProp3D.

◆ RemoveTransform()

void vtkTransformInterpolator::RemoveTransform ( double t )

Delete the transform at a particular parameter t.

If there is no transform defined at location t, then the method does nothing.

◆ InterpolateTransform()

void vtkTransformInterpolator::InterpolateTransform	(	double	t,
		vtkTransform *	xform
	)

Interpolate the list of transforms and determine a new transform (i.e., fill in the transformation provided).

If t is outside the range of (min,max) values, then t is clamped.

◆ SetInterpolationType()

virtual void vtkTransformInterpolator::SetInterpolationType ( int )

virtual

These are convenience methods to switch between linear and spline interpolation.

The methods simply forward the request for linear or spline interpolation to the position, scale and orientation interpolators. Note that if the InterpolationType is set to "Manual", then the interpolators are expected to be directly manipulated and this class does not forward the request for interpolation type to its interpolators.

◆ GetInterpolationType()

virtual int vtkTransformInterpolator::GetInterpolationType ( )

virtual

These are convenience methods to switch between linear and spline interpolation.

The methods simply forward the request for linear or spline interpolation to the position, scale and orientation interpolators. Note that if the InterpolationType is set to "Manual", then the interpolators are expected to be directly manipulated and this class does not forward the request for interpolation type to its interpolators.

◆ SetInterpolationTypeToLinear()

void vtkTransformInterpolator::SetInterpolationTypeToLinear ( )

inline

These are convenience methods to switch between linear and spline interpolation.

The methods simply forward the request for linear or spline interpolation to the position, scale and orientation interpolators. Note that if the InterpolationType is set to "Manual", then the interpolators are expected to be directly manipulated and this class does not forward the request for interpolation type to its interpolators.

Definition at line 135 of file vtkTransformInterpolator.h.

◆ SetInterpolationTypeToSpline()

void vtkTransformInterpolator::SetInterpolationTypeToSpline ( )

inline

These are convenience methods to switch between linear and spline interpolation.

The methods simply forward the request for linear or spline interpolation to the position, scale and orientation interpolators. Note that if the InterpolationType is set to "Manual", then the interpolators are expected to be directly manipulated and this class does not forward the request for interpolation type to its interpolators.

Definition at line 136 of file vtkTransformInterpolator.h.

◆ SetInterpolationTypeToManual()

void vtkTransformInterpolator::SetInterpolationTypeToManual ( )

inline

These are convenience methods to switch between linear and spline interpolation.

The methods simply forward the request for linear or spline interpolation to the position, scale and orientation interpolators. Note that if the InterpolationType is set to "Manual", then the interpolators are expected to be directly manipulated and this class does not forward the request for interpolation type to its interpolators.

Definition at line 137 of file vtkTransformInterpolator.h.

◆ SetPositionInterpolator()

virtual void vtkTransformInterpolator::SetPositionInterpolator ( vtkTupleInterpolator * )

virtual

Set/Get the tuple interpolator used to interpolate the position portion of the transformation matrix.