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# vtkAbstractTransform Class Reference

`#include <vtkAbstractTransform.h>`

Inheritance diagram for vtkAbstractTransform:

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Collaboration diagram for vtkAbstractTransform:

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List of all members.

## Detailed Description

superclass for all geometric transformations

Date:
  2002/12/26 18:24:21

Revision:
  1.20

vtkAbstractTransform is the superclass for all VTK geometric transformations. The VTK transform hierarchy is split into two major branches: warp transformations and homogeneous (including linear) transformations. The latter can be represented in terms of a 4x4 transformation matrix, the former cannot.

Transformations can be pipelined through two mechanisms:

1) GetInverse() returns the pipelined inverse of a transformation i.e. if you modify the original transform, any transform previously returned by the GetInverse() method will automatically update itself according to the change.

2) You can do pipelined concatenation of transformations through the vtkGeneralTransform class, the vtkPerspectiveTransform class, or the vtkTransform class.

See also:
  vtkGeneralTransform vtkWarpTransform vtkHomogeneousTransform vtkLinearTransform vtkIdentityTransform vtkTransformPolyDataFilter vtkTransformFilter vtkImageReslice vtkImplicitFunction

Created by:
  - Gobbi, David

CVS contributions (if > 5%):
  - Gobbi, David (91%)

CVS logs (CVSweb):
  - .`h` (`/Common/vtkAbstractTransform.h)`
  - .`cxx` (`/Common/vtkAbstractTransform.cxx)`

Definition at line 66 of file vtkAbstractTransform.h.

## Public Types

typedef vtkObject | Superclass

## Public Methods

virtual const char * | GetClassName ()
virtual int | IsA (const char *type)
void | PrintSelf (ostream &os, vtkIndent indent)
double * | TransformNormalAtPoint (const double point[3], const double normal[3])
double * | TransformVectorAtPoint (const double point[3], const double vector[3])
virtual void | TransformPoints (vtkPoints *inPts, vtkPoints *outPts)
vtkAbstractTransform * | GetInverse ()
void | SetInverse (vtkAbstractTransform *transform)
virtual void | Inverse ()=0
void | DeepCopy (vtkAbstractTransform *)
void | Update ()
virtual vtkAbstractTransform * | MakeTransform ()=0
virtual int | CircuitCheck (vtkAbstractTransform *transform)
unsigned long | GetMTime ()
virtual void | UnRegister (vtkObjectBase *O)
void | TransformPoint (const float in[3], float out[3])
void | TransformPoint (const double in[3], double out[3])
double * | TransformPoint (double x, double y, double z)
double * | TransformPoint (const double point[3])
float * | TransformFloatPoint (float x, float y, float z)
float * | TransformFloatPoint (const float point[3])
double * | TransformDoublePoint (double x, double y, double z)
double * | TransformDoublePoint (const double point[3])
void | TransformNormalAtPoint (const float point[3], const float in[3], float out[3])
void | TransformNormalAtPoint (const double point[3], const double in[3], double out[3])
double * | TransformDoubleNormalAtPoint (const double point[3], const double normal[3])
float * | TransformFloatNormalAtPoint (const float point[3], const float normal[3])
void | TransformVectorAtPoint (const float point[3], const float in[3], float out[3])
void | TransformVectorAtPoint (const double point[3], const double in[3], double out[3])
double * | TransformDoubleVectorAtPoint (const double point[3], const double vector[3])
float * | TransformFloatVectorAtPoint (const float point[3], const float vector[3])
virtual void | TransformPointsNormalsVectors (vtkPoints *inPts, vtkPoints *outPts, vtkDataArray *inNms, vtkDataArray *outNms, vtkDataArray *inVrs, vtkDataArray *outVrs)
virtual void | InternalTransformPoint (const float in[3], float out[3])=0
virtual void | InternalTransformPoint (const double in[3], double out[3])=0
virtual void | InternalTransformDerivative (const float in[3], float out[3], float derivative[3][3])=0
virtual void | InternalTransformDerivative (const double in[3], double out[3], double derivative[3][3])=0
void | Identity ()

## Static Public Methods

int | IsTypeOf (const char *type)
vtkAbstractTransform * | SafeDownCast (vtkObject *o)

## Protected Methods

| vtkAbstractTransform ()
| ~vtkAbstractTransform ()
virtual void | InternalUpdate ()
virtual void | InternalDeepCopy (vtkAbstractTransform *)

## Protected Attributes

float | InternalFloatPoint [3]
double | InternalDoublePoint [3]

## Member Typedef Documentation

typedef vtkObject vtkAbstractTransform::Superclass

Reimplemented from vtkObject.

Reimplemented in vtkCylindricalTransform, vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkWarpTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

Definition at line 70 of file vtkAbstractTransform.h.

## Constructor & Destructor Documentation

vtkAbstractTransform::vtkAbstractTransform | ( |  | ) | `[protected]`

vtkAbstractTransform::~vtkAbstractTransform | ( |  | ) | `[protected]`

## Member Function Documentation

virtual const char* vtkAbstractTransform::GetClassName | ( |  | ) | `[virtual]`

Reimplemented from vtkObject.

Reimplemented in vtkCylindricalTransform, vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkWarpTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

int vtkAbstractTransform::IsTypeOf | ( | const char * | type | ) | `[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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkCylindricalTransform, vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkWarpTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

virtual int vtkAbstractTransform::IsA | ( | const char * | type | ) | `[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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkCylindricalTransform, vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkWarpTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

vtkAbstractTransform* vtkAbstractTransform::SafeDownCast | ( | vtkObject * | o | ) | `[static]`

Reimplemented from vtkObject.

Reimplemented in vtkCylindricalTransform, vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkWarpTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

void vtkAbstractTransform::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.

Reimplemented in vtkCylindricalTransform, vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkWarpTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

void vtkAbstractTransform::TransformPoint | ( | const float | in[3],
|  | float | out[3]
| ) | `[inline]`

| Apply the transformation to a coordinate. You can use the same array to store both the input and output point. Definition at line 76 of file vtkAbstractTransform.h.

void vtkAbstractTransform::TransformPoint | ( | const double | in[3],
|  | double | out[3]
| ) | `[inline]`

| Apply the transformation to a double-precision coordinate. You can use the same array to store both the input and output point. Definition at line 83 of file vtkAbstractTransform.h.

double* vtkAbstractTransform::TransformPoint | ( | double | x,
|  | double | y,
|  | double | z
| ) | `[inline]`

| Apply the transformation to a double-precision coordinate. Use this if you are programming in Python, tcl or Java. Definition at line 90 of file vtkAbstractTransform.h.

double* vtkAbstractTransform::TransformPoint | ( | const double | point[3] | ) | `[inline]`

| Apply the transformation to a double-precision coordinate. Use this if you are programming in Python, tcl or Java. Definition at line 92 of file vtkAbstractTransform.h.

float* vtkAbstractTransform::TransformFloatPoint | ( | float | x,
|  | float | y,
|  | float | z
| ) | `[inline]`

| Apply the transformation to an (x,y,z) coordinate. Use this if you are programming in Python, tcl or Java. Definition at line 99 of file vtkAbstractTransform.h.

float* vtkAbstractTransform::TransformFloatPoint | ( | const float | point[3] | ) | `[inline]`

| Apply the transformation to an (x,y,z) coordinate. Use this if you are programming in Python, tcl or Java. Definition at line 105 of file vtkAbstractTransform.h.

double* vtkAbstractTransform::TransformDoublePoint | ( | double | x,
|  | double | y,
|  | double | z
| ) | `[inline]`

| Apply the transformation to a double-precision (x,y,z) coordinate. Use this if you are programming in Python, tcl or Java. Definition at line 112 of file vtkAbstractTransform.h.

double* vtkAbstractTransform::TransformDoublePoint | ( | const double | point[3] | ) | `[inline]`

| Apply the transformation to a double-precision (x,y,z) coordinate. Use this if you are programming in Python, tcl or Java. Definition at line 118 of file vtkAbstractTransform.h.

void vtkAbstractTransform::TransformNormalAtPoint | ( | const float | point[3],
|  | const float | in[3],
|  | float | out[3]
| ) |

| Apply the transformation to a normal at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformNormal() instead.

void vtkAbstractTransform::TransformNormalAtPoint | ( | const double | point[3],
|  | const double | in[3],
|  | double | out[3]
| ) |

| Apply the transformation to a normal at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformNormal() instead.

double* vtkAbstractTransform::TransformNormalAtPoint | ( | const double | point[3],
|  | const double | normal[3]
| ) | `[inline]`

| Definition at line 132 of file vtkAbstractTransform.h.

double* vtkAbstractTransform::TransformDoubleNormalAtPoint | ( | const double | point[3],
|  | const double | normal[3]
| ) | `[inline]`

| Apply the transformation to a double-precision normal at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformDoubleNormal() instead. Definition at line 141 of file vtkAbstractTransform.h.

float* vtkAbstractTransform::TransformFloatNormalAtPoint | ( | const float | point[3],
|  | const float | normal[3]
| ) | `[inline]`

| Apply the transformation to a single-precision normal at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformFloatNormal() instead. Definition at line 151 of file vtkAbstractTransform.h.

void vtkAbstractTransform::TransformVectorAtPoint | ( | const float | point[3],
|  | const float | in[3],
|  | float | out[3]
| ) |

| Apply the transformation to a vector at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformVector() instead.

void vtkAbstractTransform::TransformVectorAtPoint | ( | const double | point[3],
|  | const double | in[3],
|  | double | out[3]
| ) |

| Apply the transformation to a vector at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformVector() instead.

double* vtkAbstractTransform::TransformVectorAtPoint | ( | const double | point[3],
|  | const double | vector[3]
| ) | `[inline]`

| Definition at line 167 of file vtkAbstractTransform.h.

double* vtkAbstractTransform::TransformDoubleVectorAtPoint | ( | const double | point[3],
|  | const double | vector[3]
| ) | `[inline]`

| Apply the transformation to a double-precision vector at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformDoubleVector() instead. Definition at line 176 of file vtkAbstractTransform.h.

float* vtkAbstractTransform::TransformFloatVectorAtPoint | ( | const float | point[3],
|  | const float | vector[3]
| ) | `[inline]`

| Apply the transformation to a single-precision vector at the specified vertex. If the transformation is a vtkLinearTransform, you can use TransformFloatVector() instead. Definition at line 186 of file vtkAbstractTransform.h.

virtual void vtkAbstractTransform::TransformPoints | ( | vtkPoints * | inPts,
|  | vtkPoints * | outPts
| ) | `[virtual]`

| Apply the transformation to a series of points, and append the results to outPts. Reimplemented in vtkHomogeneousTransform, vtkIdentityTransform, and vtkLinearTransform.

virtual void vtkAbstractTransform::TransformPointsNormalsVectors | ( | vtkPoints * | inPts,
|  | vtkPoints * | outPts,
|  | vtkDataArray * | inNms,
|  | vtkDataArray * | outNms,
|  | vtkDataArray * | inVrs,
|  | vtkDataArray * | outVrs
| ) | `[virtual]`

| Apply the transformation to a combination of points, normals and vectors. Reimplemented in vtkHomogeneousTransform, vtkIdentityTransform, and vtkLinearTransform.

vtkAbstractTransform* vtkAbstractTransform::GetInverse | ( |  | ) |

Get the inverse of this transform. If you modify this transform, the returned inverse transform will automatically update. If you want the inverse of a vtkTransform, you might want to use GetLinearInverse() instead which will type cast the result from vtkAbstractTransform to vtkLinearTransform.

Reimplemented in vtkTransform.

Referenced by vtkHomogeneousTransform::GetHomogeneousInverse(), vtkTransform::GetInverse(), and vtkLinearTransform::GetLinearInverse().

void vtkAbstractTransform::SetInverse | ( | vtkAbstractTransform * | transform | ) |

| Set a transformation that this transform will be the inverse of. This transform will automatically update to agree with the inverse transform that you set.

virtual void vtkAbstractTransform::Inverse | ( |  | ) | `[pure virtual]`

| Invert the transformation. Implemented in vtkGeneralTransform, vtkIdentityTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkTransform, vtkWarpTransform, vtkIterativeClosestPointTransform, and vtkLandmarkTransform.

void vtkAbstractTransform::DeepCopy | ( | vtkAbstractTransform * |  | ) |

| Copy this transform from another of the same type.

void vtkAbstractTransform::Update | ( |  | ) |

| Update the transform to account for any changes which have been made. You do not have to call this method yourself, it is called automatically whenever the transform needs an update. Referenced by vtkHomogeneousTransform::GetMatrix(), vtkLinearTransform::TransformNormal(), and vtkLinearTransform::TransformVector().

virtual void vtkAbstractTransform::InternalTransformPoint | ( | const float | in[3],
|  | float | out[3]
| ) | `[pure virtual]`

| This will calculate the transformation without calling Update. Meant for use only within other VTK classes. Implemented in vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, and vtkWarpTransform.

virtual void vtkAbstractTransform::InternalTransformPoint | ( | const double | in[3],
|  | double | out[3]
| ) | `[pure virtual]`

| This will calculate the transformation without calling Update. Meant for use only within other VTK classes. Implemented in vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, and vtkWarpTransform.

virtual void vtkAbstractTransform::InternalTransformDerivative | ( | const float | in[3],
|  | float | out[3],
|  | float | derivative[3][3]
| ) | `[pure virtual]`

| This will transform a point and, at the same time, calculate a 3x3 Jacobian matrix that provides the partial derivatives of the transformation at that point. This method does not call Update. Meant for use only within other VTK classes. Implemented in vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, and vtkWarpTransform.

virtual void vtkAbstractTransform::InternalTransformDerivative | ( | const double | in[3],
|  | double | out[3],
|  | double | derivative[3][3]
| ) | `[pure virtual]`

| This will transform a point and, at the same time, calculate a 3x3 Jacobian matrix that provides the partial derivatives of the transformation at that point. This method does not call Update. Meant for use only within other VTK classes. Implemented in vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkLinearTransform, and vtkWarpTransform.

virtual vtkAbstractTransform* vtkAbstractTransform::MakeTransform | ( |  | ) | `[pure virtual]`

| Make another transform of the same type. Implemented in vtkCylindricalTransform, vtkGeneralTransform, vtkIdentityTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

virtual int vtkAbstractTransform::CircuitCheck | ( | vtkAbstractTransform * | transform | ) | `[virtual]`

Check for self-reference. Will return true if concatenating with the specified transform, setting it to be our inverse, or setting it to be our input will create a circular reference. CircuitCheck is automatically called by SetInput(), SetInverse(), and Concatenate(vtkXTransform *). Avoid using this function, it is experimental.

Reimplemented in vtkGeneralTransform, vtkPerspectiveTransform, and vtkTransform.

unsigned long vtkAbstractTransform::GetMTime | ( |  | ) | `[virtual]`

| Override GetMTime necessary because of inverse transforms. Reimplemented from vtkObject. Reimplemented in vtkGeneralTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

virtual void vtkAbstractTransform::UnRegister | ( | vtkObjectBase * | O | ) | `[virtual]`

| Needs a special UnRegister() implementation to avoid circular references. Reimplemented from vtkObject.

void vtkAbstractTransform::Identity | ( |  | ) | `[inline]`

| This method is deprecated in the base class. It is still valid to use it on many of the specialized classes. Reimplemented in vtkGeneralTransform, vtkPerspectiveTransform, and vtkTransform. Definition at line 269 of file vtkAbstractTransform.h. Referenced by vtkTransform::SetMatrix(), and vtkPerspectiveTransform::SetMatrix().

virtual void vtkAbstractTransform::InternalUpdate | ( |  | ) | `[inline, protected, virtual]`

| Perform any subclass-specific Update. Reimplemented in vtkGeneralTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform. Definition at line 278 of file vtkAbstractTransform.h.

virtual void vtkAbstractTransform::InternalDeepCopy | ( | vtkAbstractTransform * |  | ) | `[inline, protected, virtual]`

Perform any subclass-specific DeepCopy.

Reimplemented in vtkCylindricalTransform, vtkGeneralTransform, vtkHomogeneousTransform, vtkIdentityTransform, vtkMatrixToHomogeneousTransform, vtkMatrixToLinearTransform, vtkPerspectiveTransform, vtkSphericalTransform, vtkTransform, vtkGridTransform, vtkIterativeClosestPointTransform, vtkLandmarkTransform, and vtkThinPlateSplineTransform.

Definition at line 281 of file vtkAbstractTransform.h.

## Member Data Documentation

float vtkAbstractTransform::InternalFloatPoint[3]`[protected]`

| Definition at line 283 of file vtkAbstractTransform.h.

double vtkAbstractTransform::InternalDoublePoint[3]`[protected]`

| Definition at line 284 of file vtkAbstractTransform.h.

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

- Common/vtkAbstractTransform.h