vtkEncodedGradientEstimator Class Reference

#include <vtkEncodedGradientEstimator.h>

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List of all members.


Detailed Description

Superclass for gradient estimation.

vtkEncodedGradientEstimator is an abstract superclass for gradient estimation. It takes a scalar input of vtkImageData, computes a gradient value for every point, and encodes this value into a three byte value (2 for direction, 1 for magnitude) using the vtkDirectionEncoder. The direction encoder is defaulted to a vtkRecursiveSphereDirectionEncoder, but can be overridden with the SetDirectionEncoder method. The scale and the bias values for the gradient magnitude are used to convert it into a one byte value according to v = m*scale + bias where m is the magnitude and v is the resulting one byte value.

See also:
vtkFiniteDifferenceGradientEstimator vtkDirectionEncoder

Definition at line 42 of file vtkEncodedGradientEstimator.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 Update (void)
unsigned short * GetEncodedNormals (void)
unsigned char * GetGradientMagnitudes (void)
virtual int GetUseCylinderClip ()
int * GetCircleLimits ()
virtual int * GetInputSize ()
virtual void GetInputSize (int data[3])
virtual float * GetInputAspect ()
virtual void GetInputAspect (float data[3])
virtual void SetInput (vtkImageData *)
virtual vtkImageDataGetInput ()
virtual void SetGradientMagnitudeScale (float)
virtual float GetGradientMagnitudeScale ()
virtual void SetGradientMagnitudeBias (float)
virtual float GetGradientMagnitudeBias ()
virtual void SetBoundsClip (int)
virtual int GetBoundsClip ()
virtual void BoundsClipOn ()
virtual void BoundsClipOff ()
virtual void SetBounds (int, int, int, int, int, int)
virtual void SetBounds (int[6])
virtual int * GetBounds ()
virtual void GetBounds (int data[6])
int GetEncodedNormalIndex (int xyz_index)
int GetEncodedNormalIndex (int x_index, int y_index, int z_index)
virtual void SetNumberOfThreads (int)
virtual int GetNumberOfThreads ()
void SetDirectionEncoder (vtkDirectionEncoder *direnc)
virtual vtkDirectionEncoderGetDirectionEncoder ()
virtual void SetComputeGradientMagnitudes (int)
virtual int GetComputeGradientMagnitudes ()
virtual void ComputeGradientMagnitudesOn ()
virtual void ComputeGradientMagnitudesOff ()
virtual void SetCylinderClip (int)
virtual int GetCylinderClip ()
virtual void CylinderClipOn ()
virtual void CylinderClipOff ()
virtual float GetLastUpdateTimeInSeconds ()
virtual float GetLastUpdateTimeInCPUSeconds ()
void SetZeroNormalThreshold (float v)
virtual float GetZeroNormalThreshold ()
virtual void SetZeroPad (int)
virtual int GetZeroPad ()
virtual void ZeroPadOn ()
virtual void ZeroPadOff ()

Static Public Member Functions

static int IsTypeOf (const char *type)
static
vtkEncodedGradientEstimator
SafeDownCast (vtkObject *o)

Public Attributes

vtkImageDataInput
unsigned short * EncodedNormals
int EncodedNormalsSize [3]
unsigned char * GradientMagnitudes
vtkTimeStamp BuildTime

Protected Member Functions

 vtkEncodedGradientEstimator ()
 ~vtkEncodedGradientEstimator ()
virtual void ReportReferences (vtkGarbageCollector *)
virtual void UpdateNormals (void)=0
void ComputeCircleLimits (int size)

Protected Attributes

int NumberOfThreads
vtkMultiThreaderThreader
vtkDirectionEncoderDirectionEncoder
float GradientMagnitudeScale
float GradientMagnitudeBias
float LastUpdateTimeInSeconds
float LastUpdateTimeInCPUSeconds
float ZeroNormalThreshold
int CylinderClip
int * CircleLimits
int CircleLimitsSize
int UseCylinderClip
int BoundsClip
int Bounds [6]
int InputSize [3]
float InputAspect [3]
int ComputeGradientMagnitudes
int ZeroPad

Member Typedef Documentation

Reimplemented from vtkObject.

Reimplemented in vtkFiniteDifferenceGradientEstimator.

Definition at line 45 of file vtkEncodedGradientEstimator.h.


Constructor & Destructor Documentation

vtkEncodedGradientEstimator::vtkEncodedGradientEstimator (  )  [protected]

vtkEncodedGradientEstimator::~vtkEncodedGradientEstimator (  )  [protected]


Member Function Documentation

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

Reimplemented from vtkObject.

Reimplemented in vtkFiniteDifferenceGradientEstimator.

static int vtkEncodedGradientEstimator::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.

Reimplemented in vtkFiniteDifferenceGradientEstimator.

virtual int vtkEncodedGradientEstimator::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.

Reimplemented in vtkFiniteDifferenceGradientEstimator.

static vtkEncodedGradientEstimator* vtkEncodedGradientEstimator::SafeDownCast ( vtkObject o  )  [static]

Reimplemented from vtkObject.

Reimplemented in vtkFiniteDifferenceGradientEstimator.

void vtkEncodedGradientEstimator::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 vtkFiniteDifferenceGradientEstimator.

virtual void vtkEncodedGradientEstimator::SetInput ( vtkImageData  )  [virtual]

Set/Get the scalar input for which the normals will be calculated

virtual vtkImageData* vtkEncodedGradientEstimator::GetInput (  )  [virtual]

Set/Get the scalar input for which the normals will be calculated

virtual void vtkEncodedGradientEstimator::SetGradientMagnitudeScale ( float   )  [virtual]

Set/Get the scale and bias for the gradient magnitude

virtual float vtkEncodedGradientEstimator::GetGradientMagnitudeScale (  )  [virtual]

Set/Get the scale and bias for the gradient magnitude

virtual void vtkEncodedGradientEstimator::SetGradientMagnitudeBias ( float   )  [virtual]

Set/Get the scale and bias for the gradient magnitude

virtual float vtkEncodedGradientEstimator::GetGradientMagnitudeBias (  )  [virtual]

Set/Get the scale and bias for the gradient magnitude

virtual void vtkEncodedGradientEstimator::SetBoundsClip ( int   )  [virtual]

Turn on / off the bounding of the normal computation by the this->Bounds bounding box

virtual int vtkEncodedGradientEstimator::GetBoundsClip (  )  [virtual]

Turn on / off the bounding of the normal computation by the this->Bounds bounding box

virtual void vtkEncodedGradientEstimator::BoundsClipOn (  )  [virtual]

Turn on / off the bounding of the normal computation by the this->Bounds bounding box

virtual void vtkEncodedGradientEstimator::BoundsClipOff (  )  [virtual]

Turn on / off the bounding of the normal computation by the this->Bounds bounding box

virtual void vtkEncodedGradientEstimator::SetBounds ( int  ,
int  ,
int  ,
int  ,
int  ,
int   
) [virtual]

Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.

virtual void vtkEncodedGradientEstimator::SetBounds ( int  [6]  )  [virtual]

Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.

virtual int* vtkEncodedGradientEstimator::GetBounds (  )  [virtual]

Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.

virtual void vtkEncodedGradientEstimator::GetBounds ( int  data[6]  )  [virtual]

Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.

void vtkEncodedGradientEstimator::Update ( void   ) 

Recompute the encoded normals and gradient magnitudes.

unsigned short* vtkEncodedGradientEstimator::GetEncodedNormals ( void   ) 

Get the encoded normals.

int vtkEncodedGradientEstimator::GetEncodedNormalIndex ( int  xyz_index  ) 

Get the encoded normal at an x,y,z location in the volume

int vtkEncodedGradientEstimator::GetEncodedNormalIndex ( int  x_index,
int  y_index,
int  z_index 
)

Get the encoded normal at an x,y,z location in the volume

unsigned char* vtkEncodedGradientEstimator::GetGradientMagnitudes ( void   ) 

Get the gradient magnitudes

virtual void vtkEncodedGradientEstimator::SetNumberOfThreads ( int   )  [virtual]

Get/Set the number of threads to create when encoding normals This defaults to the number of available processors on the machine

virtual int vtkEncodedGradientEstimator::GetNumberOfThreads (  )  [virtual]

Get/Set the number of threads to create when encoding normals This defaults to the number of available processors on the machine

void vtkEncodedGradientEstimator::SetDirectionEncoder ( vtkDirectionEncoder direnc  ) 

Set / Get the direction encoder used to encode normal directions to fit within two bytes

virtual vtkDirectionEncoder* vtkEncodedGradientEstimator::GetDirectionEncoder (  )  [virtual]

Set / Get the direction encoder used to encode normal directions to fit within two bytes

virtual void vtkEncodedGradientEstimator::SetComputeGradientMagnitudes ( int   )  [virtual]

If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used. Be careful - if if you a non-constant gradient magnitude transfer function and you turn this on, it may crash

virtual int vtkEncodedGradientEstimator::GetComputeGradientMagnitudes (  )  [virtual]

If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used. Be careful - if if you a non-constant gradient magnitude transfer function and you turn this on, it may crash

virtual void vtkEncodedGradientEstimator::ComputeGradientMagnitudesOn (  )  [virtual]

If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used. Be careful - if if you a non-constant gradient magnitude transfer function and you turn this on, it may crash

virtual void vtkEncodedGradientEstimator::ComputeGradientMagnitudesOff (  )  [virtual]

If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used. Be careful - if if you a non-constant gradient magnitude transfer function and you turn this on, it may crash

virtual void vtkEncodedGradientEstimator::SetCylinderClip ( int   )  [virtual]

If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle. This circle through the slices forms a cylinder.

virtual int vtkEncodedGradientEstimator::GetCylinderClip (  )  [virtual]

If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle. This circle through the slices forms a cylinder.

virtual void vtkEncodedGradientEstimator::CylinderClipOn (  )  [virtual]

If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle. This circle through the slices forms a cylinder.

virtual void vtkEncodedGradientEstimator::CylinderClipOff (  )  [virtual]

If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle. This circle through the slices forms a cylinder.

virtual float vtkEncodedGradientEstimator::GetLastUpdateTimeInSeconds (  )  [virtual]

Get the time required for the last update in seconds or cpu seconds

virtual float vtkEncodedGradientEstimator::GetLastUpdateTimeInCPUSeconds (  )  [virtual]

Get the time required for the last update in seconds or cpu seconds

virtual int vtkEncodedGradientEstimator::GetUseCylinderClip (  )  [virtual]

int* vtkEncodedGradientEstimator::GetCircleLimits (  )  [inline]

Definition at line 134 of file vtkEncodedGradientEstimator.h.

void vtkEncodedGradientEstimator::SetZeroNormalThreshold ( float  v  ) 

Set / Get the ZeroNormalThreshold - this defines the minimum magnitude of a gradient that is considered sufficient to define a direction. Gradients with magnitudes at or less than this value are given a "zero normal" index. These are handled specially in the shader, and you can set the intensity of light for these zero normals in the gradient shader.

virtual float vtkEncodedGradientEstimator::GetZeroNormalThreshold (  )  [virtual]

Set / Get the ZeroNormalThreshold - this defines the minimum magnitude of a gradient that is considered sufficient to define a direction. Gradients with magnitudes at or less than this value are given a "zero normal" index. These are handled specially in the shader, and you can set the intensity of light for these zero normals in the gradient shader.

virtual void vtkEncodedGradientEstimator::SetZeroPad ( int   )  [virtual]

Assume that the data value outside the volume is zero when computing normals.

virtual int vtkEncodedGradientEstimator::GetZeroPad (  )  [virtual]

Assume that the data value outside the volume is zero when computing normals.

virtual void vtkEncodedGradientEstimator::ZeroPadOn (  )  [virtual]

Assume that the data value outside the volume is zero when computing normals.

virtual void vtkEncodedGradientEstimator::ZeroPadOff (  )  [virtual]

Assume that the data value outside the volume is zero when computing normals.

virtual int* vtkEncodedGradientEstimator::GetInputSize (  )  [virtual]

virtual void vtkEncodedGradientEstimator::GetInputSize ( int  data[3]  )  [virtual]

virtual float* vtkEncodedGradientEstimator::GetInputAspect (  )  [virtual]

virtual void vtkEncodedGradientEstimator::GetInputAspect ( float  data[3]  )  [virtual]

virtual void vtkEncodedGradientEstimator::ReportReferences ( vtkGarbageCollector  )  [protected, virtual]

Reimplemented from vtkObjectBase.

virtual void vtkEncodedGradientEstimator::UpdateNormals ( void   )  [protected, pure virtual]

void vtkEncodedGradientEstimator::ComputeCircleLimits ( int  size  )  [protected]


Member Data Documentation

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

Generated on Wed Aug 24 11:34:35 2011 for VTK by  doxygen 1.5.6