vtkExtractGrid Class Reference

#include <vtkExtractGrid.h>

Inheritance diagram for vtkExtractGrid:

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Collaboration diagram for vtkExtractGrid:

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List of all members.

Detailed Description

select piece (e.g., volume of interest) and/or subsample structured grid dataset

vtkExtractGrid is a filter that selects a portion of an input structured grid dataset, or subsamples an input dataset. (The selected portion of interested is referred to as the Volume Of Interest, or VOI.) The output of this filter is a structured grid dataset. The filter treats input data of any topological dimension (i.e., point, line, image, or volume) and can generate output data of any topological dimension.

To use this filter set the VOI ivar which are i-j-k min/max indices that specify a rectangular region in the data. (Note that these are 0-offset.) You can also specify a sampling rate to subsample the data.

Typical applications of this filter are to extract a plane from a grid for contouring, subsampling large grids to reduce data size, or extracting regions of a grid with interesting data.

See also:: vtkGeometryFilter vtkExtractGeometry vtkExtractVOI vtkStructuredGridGeometryFilter

Examples:: vtkExtractGrid (Examples)

Tests:: vtkExtractGrid (Tests)

Definition at line 50 of file vtkExtractGrid.h.


Public Types
typedef vtkStructuredGridAlgorithm	Superclass
Public Member Functions
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)

virtual void	SetVOI (int, int, int, int, int, int)
virtual void	SetVOI (int[6])
virtual int *	GetVOI ()
virtual void	GetVOI (int data[6])

virtual void	SetSampleRate (int, int, int)
virtual void	SetSampleRate (int[3])
virtual int *	GetSampleRate ()
virtual void	GetSampleRate (int data[3])

virtual void	SetIncludeBoundary (int)
virtual int	GetIncludeBoundary ()
virtual void	IncludeBoundaryOn ()
virtual void	IncludeBoundaryOff ()
Static Public Member Functions
static vtkExtractGrid *	New ()
static int	IsTypeOf (const char *type)
static vtkExtractGrid *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkExtractGrid ()
	~vtkExtractGrid ()
virtual int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )
virtual int	RequestInformation (vtkInformation , vtkInformationVector , vtkInformationVector )
virtual int	RequestUpdateExtent (vtkInformation , vtkInformationVector , vtkInformationVector )
Protected Attributes
int	VOI [6]
int	SampleRate [3]
int	IncludeBoundary

Member Typedef Documentation

typedef vtkStructuredGridAlgorithm vtkExtractGrid::Superclass

Reimplemented from vtkStructuredGridAlgorithm.

Definition at line 54 of file vtkExtractGrid.h.

Constructor & Destructor Documentation

vtkExtractGrid::vtkExtractGrid ( ) [protected]

vtkExtractGrid::~vtkExtractGrid ( ) [inline, protected]

Definition at line 88 of file vtkExtractGrid.h.

Member Function Documentation

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

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

Reimplemented from vtkStructuredGridAlgorithm.

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

Reimplemented from vtkStructuredGridAlgorithm.

static int vtkExtractGrid::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 vtkStructuredGridAlgorithm.

virtual int vtkExtractGrid::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 vtkStructuredGridAlgorithm.

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

Reimplemented from vtkStructuredGridAlgorithm.

void vtkExtractGrid::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 vtkStructuredGridAlgorithm.

virtual void vtkExtractGrid::SetVOI	(	int	,
		int	,
		int	,
		int	,
		int	,
		int
	)			`[virtual]`

Specify i-j-k (min,max) pairs to extract. The resulting structured grid dataset can be of any topological dimension (i.e., point, line, plane, or 3D grid).

virtual void vtkExtractGrid::SetVOI ( int [6] ) [virtual]

Specify i-j-k (min,max) pairs to extract. The resulting structured grid dataset can be of any topological dimension (i.e., point, line, plane, or 3D grid).

virtual int* vtkExtractGrid::GetVOI ( ) [virtual]

Specify i-j-k (min,max) pairs to extract. The resulting structured grid dataset can be of any topological dimension (i.e., point, line, plane, or 3D grid).

virtual void vtkExtractGrid::GetVOI ( int data[6] ) [virtual]

Specify i-j-k (min,max) pairs to extract. The resulting structured grid dataset can be of any topological dimension (i.e., point, line, plane, or 3D grid).

virtual void vtkExtractGrid::SetSampleRate	(	int	,
		int	,
		int
	)			`[virtual]`

Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.

virtual void vtkExtractGrid::SetSampleRate ( int [3] ) [virtual]

Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.

virtual int* vtkExtractGrid::GetSampleRate ( ) [virtual]

Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.

virtual void vtkExtractGrid::GetSampleRate ( int data[3] ) [virtual]

Set the sampling rate in the i, j, and k directions. If the rate is > 1, then the resulting VOI will be subsampled representation of the input. For example, if the SampleRate=(2,2,2), every other point will be selected, resulting in a volume 1/8th the original size.

virtual void vtkExtractGrid::SetIncludeBoundary ( int ) [virtual]

Control whether to enforce that the "boundary" of the grid is output in the subsampling process. (This ivar only has effect when the SampleRate in any direction is not equal to 1.) When this ivar IncludeBoundary is on, the subsampling will always include the boundary of the grid even though the sample rate is not an even multiple of the grid dimensions. (By default IncludeBoundary is off.)

virtual int vtkExtractGrid::GetIncludeBoundary ( ) [virtual]

Control whether to enforce that the "boundary" of the grid is output in the subsampling process. (This ivar only has effect when the SampleRate in any direction is not equal to 1.) When this ivar IncludeBoundary is on, the subsampling will always include the boundary of the grid even though the sample rate is not an even multiple of the grid dimensions. (By default IncludeBoundary is off.)

virtual void vtkExtractGrid::IncludeBoundaryOn ( ) [virtual]

Control whether to enforce that the "boundary" of the grid is output in the subsampling process. (This ivar only has effect when the SampleRate in any direction is not equal to 1.) When this ivar IncludeBoundary is on, the subsampling will always include the boundary of the grid even though the sample rate is not an even multiple of the grid dimensions. (By default IncludeBoundary is off.)

virtual void vtkExtractGrid::IncludeBoundaryOff ( ) [virtual]

Control whether to enforce that the "boundary" of the grid is output in the subsampling process. (This ivar only has effect when the SampleRate in any direction is not equal to 1.) When this ivar IncludeBoundary is on, the subsampling will always include the boundary of the grid even though the sample rate is not an even multiple of the grid dimensions. (By default IncludeBoundary is off.)

virtual int vtkExtractGrid::RequestData	(	vtkInformation *	request,
		vtkInformationVector **	inputVector,
		vtkInformationVector *	outputVector
	)			`[protected, virtual]`