vtkTransform2D Class Reference

#include <vtkTransform2D.h>

Inheritance diagram for vtkTransform2D:

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Collaboration diagram for vtkTransform2D:

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List of all members.

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.

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 45 of file vtkTransform2D.h.


Public Types
typedef vtkObject	Superclass
Public Member Functions
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
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	MultiplyPoint (const float in[3], float out[3])
void	MultiplyPoint (const double in[3], double out[3])
Static Public Member Functions
static vtkTransform2D *	New ()
static int	IsTypeOf (const char *type)
static vtkTransform2D *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkTransform2D ()
	~vtkTransform2D ()
void	InternalDeepCopy (vtkTransform2D *t)
Protected Attributes
vtkMatrix3x3 *	Matrix
vtkMatrix3x3 *	InverseMatrix

Member Typedef Documentation

typedef vtkObject vtkTransform2D::Superclass

Reimplemented from vtkObject.

Definition at line 49 of file vtkTransform2D.h.

Constructor & Destructor Documentation

vtkTransform2D::vtkTransform2D ( ) [protected]

vtkTransform2D::~vtkTransform2D ( ) [protected]

Member Function Documentation

static vtkTransform2D* vtkTransform2D::New ( ) [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkObject.

virtual const char* vtkTransform2D::GetClassName ( ) [virtual]

Reimplemented from vtkObject.

static int vtkTransform2D::IsTypeOf ( const char * name ) [static]

Return 1 if this class type 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.

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 ( vtkObject * o ) [static]

Reimplemented from vtkObject.

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 62 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 63 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 74 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 75 of file vtkTransform2D.h.

void vtkTransform2D::SetMatrix ( vtkMatrix3x3 * matrix ) [inline]

Set the current matrix directly.

Definition at line 80 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 96 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 147 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 149 of file vtkTransform2D.h.

void vtkTransform2D::InternalDeepCopy ( vtkTransform2D * t ) [protected]