describes linear transformations via a 3x3 matrix More...

#include <vtkTransform2D.h>

Inheritance diagram for vtkTransform2D:

Collaboration diagram for vtkTransform2D:

Public Types
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...

vtkTransform2D *	NewInstance () const

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

void	Identity ()
	Set the transformation to the identity transformation. More...

void	Inverse ()
	Invert the transformation. More...

void	Translate (double x, double y)
	Create a translation matrix and concatenate it with the current transformation. More...

void	Translate (const double x[2])

void	Translate (const float x[2])

void	Rotate (double angle)
	Create a rotation matrix and concatenate it with the current transformation. More...

void	Scale (double x, double y)
	Create a scale matrix (i.e. More...

void	Scale (const double s[2])

void	Scale (const float s[2])

void	SetMatrix (vtkMatrix3x3 *matrix)
	Set the current matrix directly. More...

void	SetMatrix (const double elements[9])

virtual vtkMatrix3x3 *	GetMatrix ()
	Get the underlying 3x3 matrix. More...

void	GetMatrix (vtkMatrix3x3 *matrix)

void	GetPosition (double pos[2])
	Return the position from the current transformation matrix as an array of two floating point numbers. More...

void	GetPosition (float pos[2])

void	GetScale (double pos[2])
	Return the x and y scale from the current transformation matrix as an array of two floating point numbers. More...

void	GetScale (float pos[2])

void	GetInverse (vtkMatrix3x3 *inverse)
	Return a matrix which is the inverse of the current transformation matrix. More...

void	GetTranspose (vtkMatrix3x3 *transpose)
	Return a matrix which is the transpose of the current transformation matrix. More...

vtkMTimeType	GetMTime () override
	Override GetMTime to account for input and concatenation. More...

void	TransformPoints (const float inPts, float outPts, int n)
	Apply the transformation to a series of points, and append the results to outPts. More...

void	TransformPoints (const double inPts, double outPts, int n)
	Apply the transformation to a series of points, and append the results to outPts. More...

void	TransformPoints (vtkPoints2D inPts, vtkPoints2D outPts)
	Apply the transformation to a series of points, and append the results to outPts. More...

void	InverseTransformPoints (const float inPts, float outPts, int n)
	Apply the transformation to a series of points, and append the results to outPts. More...

void	InverseTransformPoints (const double inPts, double outPts, int n)
	Apply the transformation to a series of points, and append the results to outPts. More...

void	InverseTransformPoints (vtkPoints2D inPts, vtkPoints2D outPts)
	Apply the transformation to a series of points, and append the results to outPts. More...

void	MultiplyPoint (const float in[3], float out[3])
	Use this method only if you wish to compute the transformation in homogeneous (x,y,w) coordinates, otherwise use TransformPoint(). More...

void	MultiplyPoint (const double in[3], double out[3])

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...

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)

vtkCommand *	GetCommand (unsigned long tag)

void	RemoveObserver (vtkCommand *)

void	RemoveObservers (unsigned long event, vtkCommand *)

void	RemoveObservers (const char event, vtkCommand )

int	HasObserver (unsigned long event, vtkCommand *)

int	HasObserver (const char event, vtkCommand )

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)

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 vtkTransform2D *	New ()

static int	IsTypeOf (const char *type)

static vtkTransform2D *	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 ()

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 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

	vtkTransform2D ()

	~vtkTransform2D () override

void	InternalDeepCopy (vtkTransform2D *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=NULL)
	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
vtkMatrix3x3 *	Matrix

vtkMatrix3x3 *	InverseMatrix

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Detailed Description

describes linear transformations via a 3x3 matrix

A vtkTransform2D can be used to describe the full range of linear (also known as affine) coordinate transformations in two dimensions, which are internally represented as a 3x3 homogeneous transformation matrix. When you create a new vtkTransform2D, it is always initialized to the identity transformation.

All multiplicitive operations (Translate, Rotate, Scale, etc) are post-multiplied in this class (i.e. add them in the reverse of the order that they should be applied).

This class performs all of its operations in a right handed coordinate system with right handed rotations. Some other graphics libraries use left handed coordinate systems and rotations.

Examples:: vtkTransform2D (Examples)

Tests:: vtkTransform2D (Tests)

Definition at line 51 of file vtkTransform2D.h.

Member Typedef Documentation

◆ Superclass

typedef vtkObject vtkTransform2D::Superclass

Definition at line 55 of file vtkTransform2D.h.

Constructor & Destructor Documentation

◆ vtkTransform2D()

vtkTransform2D::vtkTransform2D ( )

protected

◆ ~vtkTransform2D()

vtkTransform2D::~vtkTransform2D ( )

overrideprotected

Member Function Documentation

◆ New()

static vtkTransform2D* vtkTransform2D::New ( )

static

◆ IsTypeOf()

static int vtkTransform2D::IsTypeOf ( const char * type )

static

◆ IsA()

virtual int vtkTransform2D::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 vtkTransform2D* vtkTransform2D::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkTransform2D::NewInstanceInternal ( ) const

protectedvirtual

◆ NewInstance()

vtkTransform2D* vtkTransform2D::NewInstance ( ) const

◆ PrintSelf()

void vtkTransform2D::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.

◆ Identity()

void vtkTransform2D::Identity ( )

Set the transformation to the identity transformation.

◆ Inverse()

void vtkTransform2D::Inverse ( )

Invert the transformation.

◆ Translate() [1/3]

void vtkTransform2D::Translate	(	double	x,
		double	y
	)

Create a translation matrix and concatenate it with the current transformation.

◆ Translate() [2/3]

void vtkTransform2D::Translate ( const double x[2] )

inline

Definition at line 73 of file vtkTransform2D.h.

◆ Translate() [3/3]

void vtkTransform2D::Translate ( const float x[2] )

inline

Definition at line 74 of file vtkTransform2D.h.

◆ Rotate()

void vtkTransform2D::Rotate ( double angle )

Create a rotation matrix and concatenate it with the current transformation.

The angle is in degrees.

◆ Scale() [1/3]

void vtkTransform2D::Scale	(	double	x,
		double	y
	)

Create a scale matrix (i.e.

set the diagonal elements to x, y) and concatenate it with the current transformation.

◆ Scale() [2/3]

void vtkTransform2D::Scale ( const double s[2] )

inline

Definition at line 87 of file vtkTransform2D.h.

◆ Scale() [3/3]

void vtkTransform2D::Scale ( const float s[2] )

inline

Definition at line 88 of file vtkTransform2D.h.

◆ SetMatrix() [1/2]

void vtkTransform2D::SetMatrix ( vtkMatrix3x3 * matrix )

inline

Set the current matrix directly.

Definition at line 93 of file vtkTransform2D.h.

◆ SetMatrix() [2/2]

void vtkTransform2D::SetMatrix ( const double elements[9] )

◆ GetMatrix() [1/2]

virtual vtkMatrix3x3* vtkTransform2D::GetMatrix ( )

virtual

Get the underlying 3x3 matrix.

◆ GetMatrix() [2/2]

void vtkTransform2D::GetMatrix ( vtkMatrix3x3 * matrix )

◆ GetPosition() [1/2]

void vtkTransform2D::GetPosition ( double pos[2] )

Return the position from the current transformation matrix as an array of two floating point numbers.

This is simply returning the translation component of the 3x3 matrix.

◆ GetPosition() [2/2]

void vtkTransform2D::GetPosition ( float pos[2] )

inline

Definition at line 112 of file vtkTransform2D.h.

◆ GetScale() [1/2]

void vtkTransform2D::GetScale ( double pos[2] )

Return the x and y scale from the current transformation matrix as an array of two floating point numbers.

This is simply returning the scale component of the 3x3 matrix.

◆ GetScale() [2/2]

void vtkTransform2D::GetScale ( float pos[2] )

inline

Definition at line 126 of file vtkTransform2D.h.

◆ GetInverse()

void vtkTransform2D::GetInverse ( vtkMatrix3x3 * inverse )

Return a matrix which is the inverse of the current transformation matrix.

◆ GetTranspose()

void vtkTransform2D::GetTranspose ( vtkMatrix3x3 * transpose )

Return a matrix which is the transpose of the current transformation matrix.

This is equivalent to the inverse if and only if the transformation is a pure rotation with no translation or scale.

◆ GetMTime()

vtkMTimeType vtkTransform2D::GetMTime ( )

overridevirtual

Override GetMTime to account for input and concatenation.

Reimplemented from vtkObject.