vtkTransform2D Class Reference

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 Types inherited from vtkObject
typedef vtkObjectBase	Superclass

Public Member Functions
virtual int	IsA (const char *type)
vtkTransform2D *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
void	Identity ()
void	Inverse ()
void	Rotate (double angle)
void	GetInverse (vtkMatrix3x3 *inverse)
void	GetTranspose (vtkMatrix3x3 *transpose)
unsigned long	GetMTime ()
void	TransformPoints (const float *inPts, float *outPts, int n)
void	TransformPoints (const double *inPts, double *outPts, int n)
void	TransformPoints (vtkPoints2D *inPts, vtkPoints2D *outPts)
void	InverseTransformPoints (const float *inPts, float *outPts, int n)
void	InverseTransformPoints (const double *inPts, double *outPts, int n)
void	InverseTransformPoints (vtkPoints2D *inPts, vtkPoints2D *outPts)
void	Translate (double x, double y)
void	Translate (const double x[2])
void	Translate (const float x[2])
void	Scale (double x, double y)
void	Scale (const double s[2])
void	Scale (const float s[2])
void	SetMatrix (vtkMatrix3x3 *matrix)
void	SetMatrix (const double elements[9])
virtual vtkMatrix3x3 *	GetMatrix ()
void	GetMatrix (vtkMatrix3x3 *matrix)
void	GetPosition (double pos[2])
void	GetPosition (float pos[2])
void	GetScale (double pos[2])
void	GetScale (float pos[2])
void	MultiplyPoint (const float in[3], float out[3])
void	MultiplyPoint (const double in[3], double out[3])
Public Member Functions inherited from vtkObject
vtkObject *	NewInstance () const
virtual void	DebugOn ()
virtual void	DebugOff ()
bool	GetDebug ()
void	SetDebug (bool debugFlag)
virtual void	Modified ()
unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
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)
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)
int	InvokeEvent (unsigned long event, void *callData)
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
virtual void	Delete ()
virtual void	FastDelete ()
void	Print (ostream &os)
virtual void	Register (vtkObjectBase *o)
virtual void	UnRegister (vtkObjectBase *o)
void	SetReferenceCount (int)
void	PrintRevisions (ostream &)
virtual void	PrintHeader (ostream &os, vtkIndent indent)
virtual void	PrintTrailer (ostream &os, vtkIndent indent)
int	GetReferenceCount ()

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 int	IsTypeOf (const char *type)
static vtkObject *	SafeDownCast (vtkObjectBase *o)
static vtkObject *	New ()
static void	BreakOnError ()
static void	SetGlobalWarningDisplay (int val)
static void	GlobalWarningDisplayOn ()
static void	GlobalWarningDisplayOff ()
static int	GetGlobalWarningDisplay ()
Static Public Member Functions inherited from vtkObjectBase
static int	IsTypeOf (const char *name)
static vtkObjectBase *	New ()

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkTransform2D ()
	~vtkTransform2D ()
void	InternalDeepCopy (vtkTransform2D *t)
Protected Member Functions inherited from vtkObject
	vtkObject ()
virtual	~vtkObject ()
virtual void	RegisterInternal (vtkObjectBase *, int check)
virtual void	UnRegisterInternal (vtkObjectBase *, int check)
void	InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=NULL)
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 50 of file vtkTransform2D.h.

Member Typedef Documentation

typedef vtkObject vtkTransform2D::Superclass

Definition at line 54 of file vtkTransform2D.h.

Constructor & Destructor Documentation

vtkTransform2D::vtkTransform2D ( )

protected

vtkTransform2D::~vtkTransform2D ( )

protected

Member Function Documentation

static vtkTransform2D* vtkTransform2D::New ( )

static

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

static

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 vtkObject.

static vtkTransform2D* vtkTransform2D::SafeDownCast ( vtkObjectBase *  o )

static

virtual vtkObjectBase* vtkTransform2D::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkObject.

vtkTransform2D* vtkTransform2D::NewInstance

(

)

const

void vtkTransform2D::PrintSelf ( ostream &  os, vtkIndent  indent  )

virtual

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.

void vtkTransform2D::Identity

(

)

Set the transformation to the identity transformation.

void vtkTransform2D::Inverse

(

)

Invert the transformation.

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

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

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

inline

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

Definition at line 67 of file vtkTransform2D.h.

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

inline

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

Definition at line 68 of file vtkTransform2D.h.

void vtkTransform2D::Rotate

(

double

angle

)

Create a rotation matrix and concatenate it with the current transformation. The angle is in degrees.

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.

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

inline

Create a scale matrix (i.e. set the diagonal elements to x, y) and concatenate it with the current transformation.

Definition at line 79 of file vtkTransform2D.h.

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

inline

Create a scale matrix (i.e. set the diagonal elements to x, y) and concatenate it with the current transformation.

Definition at line 80 of file vtkTransform2D.h.

void vtkTransform2D::SetMatrix ( vtkMatrix3x3 *  matrix )

inline

Set the current matrix directly.

Definition at line 85 of file vtkTransform2D.h.

void vtkTransform2D::SetMatrix

(

const double

elements[9]

)

Set the current matrix directly.

virtual vtkMatrix3x3* vtkTransform2D::GetMatrix ( )

virtual

Get the underlying 3x3 matrix.

void vtkTransform2D::GetMatrix

(

vtkMatrix3x3 *

matrix

)

Get the underlying 3x3 matrix.

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.

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

inline

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.

Definition at line 101 of file vtkTransform2D.h.

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.

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

inline

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.

Definition at line 113 of file vtkTransform2D.h.

void vtkTransform2D::GetInverse

(

vtkMatrix3x3 *

inverse

)

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

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.

unsigned long vtkTransform2D::GetMTime ( )

virtual

Override GetMTime to account for input and concatenation.

Reimplemented from vtkObject.

void vtkTransform2D::TransformPoints	(	const float *	inPts,
		float *	outPts,
		int	n
	)

Apply the transformation to a series of points, and append the results to outPts. Where n is the number of points, and the float pointers are of length 2*n.

void vtkTransform2D::TransformPoints	(	const double *	inPts,
		double *	outPts,
		int	n
	)

Apply the transformation to a series of points, and append the results to outPts. Where n is the number of points, and the float pointers are of length 2*n.

void vtkTransform2D::TransformPoints	(	vtkPoints2D *	inPts,
		vtkPoints2D *	outPts
	)

Apply the transformation to a series of points, and append the results to outPts.

void vtkTransform2D::InverseTransformPoints	(	const float *	inPts,
		float *	outPts,
		int	n
	)

Apply the transformation to a series of points, and append the results to outPts. Where n is the number of points, and the float pointers are of length 2*n.

void vtkTransform2D::InverseTransformPoints	(	const double *	inPts,
		double *	outPts,
		int	n
	)

Apply the transformation to a series of points, and append the results to outPts. Where n is the number of points, and the float pointers are of length 2*n.

void vtkTransform2D::InverseTransformPoints	(	vtkPoints2D *	inPts,
		vtkPoints2D *	outPts
	)

Apply the transformation to a series of points, and append the results to outPts.

void vtkTransform2D::MultiplyPoint ( const float  in[3], float  out[3]  )

inline

Use this method only if you wish to compute the transformation in homogeneous (x,y,w) coordinates, otherwise use TransformPoint(). This method calls this->GetMatrix()->MultiplyPoint().

Definition at line 164 of file vtkTransform2D.h.

void vtkTransform2D::MultiplyPoint ( const double  in[3], double  out[3]  )

inline

Use this method only if you wish to compute the transformation in homogeneous (x,y,w) coordinates, otherwise use TransformPoint(). This method calls this->GetMatrix()->MultiplyPoint().

Definition at line 166 of file vtkTransform2D.h.

void vtkTransform2D::InternalDeepCopy ( vtkTransform2D *  t )

protected

Member Data Documentation

vtkMatrix3x3* vtkTransform2D::Matrix

protected

Definition at line 176 of file vtkTransform2D.h.

vtkMatrix3x3* vtkTransform2D::InverseMatrix

protected

Definition at line 177 of file vtkTransform2D.h.

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

• dox/Common/Transforms/vtkTransform2D.h