vtkCutter Class Reference

#include <vtkCutter.h>

Inheritance diagram for vtkCutter:

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Collaboration diagram for vtkCutter:

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List of all members.

Detailed Description

Cut vtkDataSet with user-specified implicit function.

vtkCutter is a filter to cut through data using any subclass of vtkImplicitFunction. That is, a polygonal surface is created corresponding to the implicit function F(x,y,z) = value(s), where you can specify one or more values used to cut with.

In VTK, cutting means reducing a cell of dimension N to a cut surface of dimension N-1. For example, a tetrahedron when cut by a plane (i.e., vtkPlane implicit function) will generate triangles. (In comparison, clipping takes a N dimensional cell and creates N dimension primitives.)

vtkCutter is generally used to "slice-through" a dataset, generating a surface that can be visualized. It is also possible to use vtkCutter to do a form of volume rendering. vtkCutter does this by generating multiple cut surfaces (usually planes) which are ordered (and rendered) from back-to-front. The surfaces are set translucent to give a volumetric rendering effect.

Note that data can be cut using either 1) the scalar values associated with the dataset or 2) an implicit function associated with this class. By default, if an implicit function is set it is used to clip the data set, otherwise the dataset scalars are used to perform the clipping.

See also:: vtkImplicitFunction vtkClipPolyData

Examples:: vtkCutter (Examples)

Tests:: vtkCutter (Tests)

Definition at line 67 of file vtkCutter.h.


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

void	SetValue (int i, double value)

double	GetValue (int i)

double *	GetValues ()

void	GetValues (double *contourValues)

void	SetNumberOfContours (int number)

int	GetNumberOfContours ()

void	GenerateValues (int numContours, double range[2])

void	GenerateValues (int numContours, double rangeStart, double rangeEnd)

virtual void	SetCutFunction (vtkImplicitFunction *)
virtual vtkImplicitFunction *	GetCutFunction ()

virtual void	SetGenerateCutScalars (int)
virtual int	GetGenerateCutScalars ()
virtual void	GenerateCutScalarsOn ()
virtual void	GenerateCutScalarsOff ()

void	SetLocator (vtkIncrementalPointLocator *locator)
virtual vtkIncrementalPointLocator *	GetLocator ()

virtual void	SetSortBy (int)
virtual int	GetSortBy ()
void	SetSortByToSortByValue ()
void	SetSortByToSortByCell ()
const char *	GetSortByAsString ()
Static Public Member Functions
static int	IsTypeOf (const char *type)
static vtkCutter *	SafeDownCast (vtkObject *o)
static vtkCutter *	New ()
static void	GetCellTypeDimensions (unsigned char *cellTypeDimensions)
Protected Member Functions
	vtkCutter (vtkImplicitFunction *cf=NULL)
	~vtkCutter ()
virtual int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )
virtual int	RequestUpdateExtent (vtkInformation , vtkInformationVector , vtkInformationVector )
virtual int	FillInputPortInformation (int port, vtkInformation *info)
void	UnstructuredGridCutter (vtkDataSet input, vtkPolyData output)
void	DataSetCutter (vtkDataSet input, vtkPolyData output)
void	StructuredPointsCutter (vtkDataSet , vtkPolyData , vtkInformation , vtkInformationVector , vtkInformationVector )
void	StructuredGridCutter (vtkDataSet , vtkPolyData )
void	RectilinearGridCutter (vtkDataSet , vtkPolyData )

virtual int	ProcessRequest (vtkInformation , vtkInformationVector , vtkInformationVector )
Protected Attributes
vtkImplicitFunction *	CutFunction
vtkSynchronizedTemplates3D *	SynchronizedTemplates3D
vtkSynchronizedTemplatesCutter3D *	SynchronizedTemplatesCutter3D
vtkGridSynchronizedTemplates3D *	GridSynchronizedTemplates
vtkRectilinearSynchronizedTemplates *	RectilinearSynchronizedTemplates
vtkIncrementalPointLocator *	Locator
int	SortBy
vtkContourValues *	ContourValues
int	GenerateCutScalars

Member Typedef Documentation

typedef vtkPolyDataAlgorithm vtkCutter::Superclass

Reimplemented from vtkPolyDataAlgorithm.

Definition at line 70 of file vtkCutter.h.

Constructor & Destructor Documentation

vtkCutter::vtkCutter ( vtkImplicitFunction * cf = NULL ) [protected]

vtkCutter::~vtkCutter ( ) [protected]

Member Function Documentation

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

Reimplemented from vtkPolyDataAlgorithm.

static int vtkCutter::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 vtkPolyDataAlgorithm.

virtual int vtkCutter::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 vtkPolyDataAlgorithm.

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

Reimplemented from vtkPolyDataAlgorithm.

void vtkCutter::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 vtkPolyDataAlgorithm.

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

Construct with user-specified implicit function; initial value of 0.0; and generating cut scalars turned off.

Reimplemented from vtkPolyDataAlgorithm.

void vtkCutter::SetValue	(	int	i,
		double	value
	)			`[inline]`

Set a particular contour value at contour number i. The index i ranges between 0<=i<NumberOfContours.

Definition at line 80 of file vtkCutter.h.

double vtkCutter::GetValue ( int i ) [inline]

Get the ith contour value.

Definition at line 86 of file vtkCutter.h.

double* vtkCutter::GetValues ( ) [inline]

Get a pointer to an array of contour values. There will be GetNumberOfContours() values in the list.

Definition at line 93 of file vtkCutter.h.

void vtkCutter::GetValues ( double * contourValues ) [inline]

Fill a supplied list with contour values. There will be GetNumberOfContours() values in the list. Make sure you allocate enough memory to hold the list.

Definition at line 101 of file vtkCutter.h.

void vtkCutter::SetNumberOfContours ( int number ) [inline]

Set the number of contours to place into the list. You only really need to use this method to reduce list size. The method SetValue() will automatically increase list size as needed.

Definition at line 109 of file vtkCutter.h.

int vtkCutter::GetNumberOfContours ( ) [inline]

Get the number of contours in the list of contour values.

Definition at line 115 of file vtkCutter.h.

void vtkCutter::GenerateValues	(	int	numContours,
		double	range[2]
	)			`[inline]`

Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.

Definition at line 122 of file vtkCutter.h.

void vtkCutter::GenerateValues	(	int	numContours,
		double	rangeStart,
		double	rangeEnd
	)			`[inline]`

Generate numContours equally spaced contour values between specified range. Contour values will include min/max range values.

Definition at line 129 of file vtkCutter.h.

unsigned long vtkCutter::GetMTime ( ) [virtual]

Override GetMTime because we delegate to vtkContourValues and refer to vtkImplicitFunction.

Reimplemented from vtkObject.

virtual void vtkCutter::SetCutFunction ( vtkImplicitFunction * ) [virtual]

Specify the implicit function to perform the cutting.

virtual vtkImplicitFunction* vtkCutter::GetCutFunction ( ) [virtual]

Specify the implicit function to perform the cutting.

virtual void vtkCutter::SetGenerateCutScalars ( int ) [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

virtual int vtkCutter::GetGenerateCutScalars ( ) [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

virtual void vtkCutter::GenerateCutScalarsOn ( ) [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

virtual void vtkCutter::GenerateCutScalarsOff ( ) [virtual]

If this flag is enabled, then the output scalar values will be interpolated from the implicit function values, and not the input scalar data.

void vtkCutter::SetLocator ( vtkIncrementalPointLocator * locator )

Specify a spatial locator for merging points. By default, an instance of vtkMergePoints is used.

virtual vtkIncrementalPointLocator* vtkCutter::GetLocator ( ) [virtual]

Specify a spatial locator for merging points. By default, an instance of vtkMergePoints is used.

virtual void vtkCutter::SetSortBy ( int ) [virtual]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster). Sort by cell is going to have a problem if the input has 2D and 3D cells. Cell data will be scrambled becauses with vtkPolyData output, verts and lines have lower cell ids than triangles.

virtual int vtkCutter::GetSortBy ( ) [virtual]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster). Sort by cell is going to have a problem if the input has 2D and 3D cells. Cell data will be scrambled becauses with vtkPolyData output, verts and lines have lower cell ids than triangles.

void vtkCutter::SetSortByToSortByValue ( ) [inline]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster). Sort by cell is going to have a problem if the input has 2D and 3D cells. Cell data will be scrambled becauses with vtkPolyData output, verts and lines have lower cell ids than triangles.

Definition at line 172 of file vtkCutter.h.

void vtkCutter::SetSortByToSortByCell ( ) [inline]

Set the sorting order for the generated polydata. There are two possibilities: Sort by value = 0 - This is the most efficient sort. For each cell, all contour values are processed. This is the default. Sort by cell = 1 - For each contour value, all cells are processed. This order should be used if the extracted polygons must be rendered in a back-to-front or front-to-back order. This is very problem dependent. For most applications, the default order is fine (and faster). Sort by cell is going to have a problem if the input has 2D and 3D cells. Cell data will be scrambled becauses with vtkPolyData output, verts and lines have lower cell ids than triangles.

Definition at line 174 of file vtkCutter.h.

const char * vtkCutter::GetSortByAsString ( void ) [inline]

Return the sorting procedure as a descriptive character string.

Definition at line 228 of file vtkCutter.h.

void vtkCutter::CreateDefaultLocator ( )

Create default locator. Used to create one when none is specified. The locator is used to merge coincident points.

static void vtkCutter::GetCellTypeDimensions ( unsigned char * cellTypeDimensions ) [static]

Normally I would put this in a different class, but since This is a temporary fix until we convert this class and contour filter to generate unstructured grid output instead of poly data, I am leaving it here.

virtual int vtkCutter::ProcessRequest	(	vtkInformation *	,
		vtkInformationVector **	,
		vtkInformationVector *
	)			`[protected, virtual]`

Overridden to process REQUEST_UPDATE_EXTENT_INFORMATION.

Reimplemented from vtkPolyDataAlgorithm.

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

This is called by the superclass. This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

virtual int vtkCutter::RequestUpdateExtent	(	vtkInformation *	,
		vtkInformationVector **	,
		vtkInformationVector *
	)			`[protected, virtual]`

This is called by the superclass. This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

virtual int vtkCutter::FillInputPortInformation	(	int	port,
		vtkInformation *	info
	)			`[protected, virtual]`

Fill the input port information objects for this algorithm. This is invoked by the first call to GetInputPortInformation for each port so subclasses can specify what they can handle.

Reimplemented from vtkPolyDataAlgorithm.