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vtkGridTransform Class Reference

a nonlinear warp transformation. More...

#include <vtkGridTransform.h>

Inheritance diagram for vtkGridTransform:

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Collaboration diagram for vtkGridTransform:

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List of all members.

Public Methods

virtual const char * GetClassName ()
virtual int IsA (const char *type)
virtual void PrintSelf (ostream &os, vtkIndent indent)
virtual void SetDisplacementGrid (vtkImageData *)
virtual vtkImageDataGetDisplacementGrid ()
virtual void SetDisplacementScale (float)
virtual float GetDisplacementScale ()
virtual void SetDisplacementShift (float)
virtual float GetDisplacementShift ()
void SetInterpolationMode (int mode)
virtual int GetInterpolationMode ()
void SetInterpolationModeToNearestNeighbor ()
void SetInterpolationModeToLinear ()
void SetInterpolationModeToCubic ()
const char * GetInterpolationModeAsString ()
vtkAbstractTransformMakeTransform ()
unsigned long GetMTime ()

Static Public Methods

vtkGridTransform * New ()
int IsTypeOf (const char *type)
vtkGridTransform * SafeDownCast (vtkObject *o)

Protected Methods

 vtkGridTransform ()
 ~vtkGridTransform ()
 vtkGridTransform (const vtkGridTransform &)
void operator= (const vtkGridTransform &)
void InternalUpdate ()
void InternalDeepCopy (vtkAbstractTransform *transform)
void ForwardTransformPoint (const float in[3], float out[3])
void ForwardTransformPoint (const double in[3], double out[3])
void ForwardTransformDerivative (const float in[3], float out[3], float derivative[3][3])
void ForwardTransformDerivative (const double in[3], double out[3], double derivative[3][3])
void InverseTransformPoint (const float in[3], float out[3])
void InverseTransformPoint (const double in[3], double out[3])
void InverseTransformDerivative (const float in[3], float out[3], float derivative[3][3])
void InverseTransformDerivative (const double in[3], double out[3], double derivative[3][3])

Protected Attributes

void(* InterpolationFunction )(float point[3], float displacement[3], float derivatives[3][3], void *gridPtr, int gridType, int inExt[6], int inInc[3])
int InterpolationMode
vtkImageDataDisplacementGrid
float DisplacementScale
float DisplacementShift

Detailed Description

a nonlinear warp transformation.

Date:
2000/12/10 20:08:24
Revision:
1.6
Thanks:
Thanks to David G. Gobbi who developed this class.
vtkGridTransform describes a nonlinear warp transformation as a set of displacement vectors sampled along a uniform 3D grid.
Warning:
The inverse grid transform is calculated using an iterative method, and is several times more expensive than the forward transform.
See also:
vtkThinPlateSplineTransform vtkGeneralTransform vtkTransformToGrid
Examples:
vtkGridTransform (examples)


Member Function Documentation

void vtkGridTransform::ForwardTransformDerivative const float    in[3],
float    out[3],
float    derivative[3][3]
[protected, virtual]
 

Calculate the forward transform as well as the derivative.

Implements vtkWarpTransform.

void vtkGridTransform::ForwardTransformPoint const float    in[3],
float    out[3]
[protected, virtual]
 

Internal functions for calculating the transformation.

Implements vtkWarpTransform.

virtual const char* vtkGridTransform::GetClassName   [virtual]
 

Return the class name as a string. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkWarpTransform.

unsigned long vtkGridTransform::GetMTime   [virtual]
 

Get the MTime.

Reimplemented from vtkAbstractTransform.

void vtkGridTransform::InternalDeepCopy vtkAbstractTransform   transform [protected, virtual]
 

Copy this transform from another of the same type.

Reimplemented from vtkAbstractTransform.

void vtkGridTransform::InternalUpdate   [protected, virtual]
 

Update the displacement grid.

Reimplemented from vtkAbstractTransform.

void vtkGridTransform::InverseTransformDerivative const float    in[3],
float    out[3],
float    derivative[3][3]
[protected, virtual]
 

Calculate the inverse transform as well as the derivative of the forward transform (that's correct: the derivative of the forward transform, not of the inverse transform)

Reimplemented from vtkWarpTransform.

void vtkGridTransform::InverseTransformPoint const float    in[3],
float    out[3]
[protected, virtual]
 

If the InverseFlag is set to 1, then a call to InternalTransformPoint results in a call to InverseTransformPoint. The inverse transformation is calculated from using Newton's method.

Reimplemented from vtkWarpTransform.

virtual int vtkGridTransform::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 vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkWarpTransform.

int vtkGridTransform::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 vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkWarpTransform.

vtkAbstractTransform* vtkGridTransform::MakeTransform   [virtual]
 

Make another transform of the same type.

Implements vtkAbstractTransform.

vtkGridTransform* vtkGridTransform::New   [static]
 

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

Reimplemented from vtkObject.

virtual void vtkGridTransform::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 vtkWarpTransform.

vtkGridTransform* vtkGridTransform::SafeDownCast vtkObject   o [static]
 

Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkWarpTransform.

virtual void vtkGridTransform::SetDisplacementGrid vtkImageData   [virtual]
 

Set/Get the grid transform (the grid transform must have three components for displacement in x, y, and z respectively). The vtkGridTransform class will never modify the data.

virtual void vtkGridTransform::SetDisplacementScale float    [virtual]
 

Set scale factor to be applied to the displacements. This is used primarily for grids which contain integer data types. Default: 1

virtual void vtkGridTransform::SetDisplacementShift float    [virtual]
 

Set a shift to be applied to the displacements. The shift is applied after the scale, i.e. x = scale*y + shift. Default: 0

void vtkGridTransform::SetInterpolationMode int    mode
 

Set interpolation mode for sampling the grid. Higher-order interpolation allows you to use a sparser grid. Default: Linear.


The documentation for this class was generated from the following file:
Generated on Tue Mar 19 13:25:42 2002 for VTK by doxygen1.2.14 written by Dimitri van Heesch, © 1997-2002