generate isosurfaces/isolines from scalar values More...

#include <vtkContourFilter.h>

Inheritance diagram for vtkContourFilter:

Collaboration diagram for vtkContourFilter:

Public Types
typedef vtkPolyDataAlgorithm	Superclass

Public Types inherited from vtkPolyDataAlgorithm
typedef vtkAlgorithm	Superclass

Public Types inherited from vtkAlgorithm
enum	DesiredOutputPrecision { SINGLE_PRECISION , DOUBLE_PRECISION , DEFAULT_PRECISION }
	Values used for setting the desired output precision for various algorithms. More...

typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkContourFilter *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

vtkMTimeType	GetMTime () override
	Modified GetMTime Because we delegate to vtkContourValues.

void	CreateDefaultLocator ()
	Create default locator.

void	SetInputArray (const std::string &name)
	Sets the name of the input array to be used for generating the isosurfaces.


void	SetValue (int i, double value)
	Methods to set / get contour values.

double	GetValue (int i)
	Get the ith contour value.

double *	GetValues ()
	Get a pointer to an array of contour values.

void	GetValues (double *contourValues)
	Fill a supplied list with contour values.

void	SetNumberOfContours (int number)
	Set the number of contours to place into the list.

int	GetNumberOfContours ()
	Get the number of contours in the list of contour values.

void	GenerateValues (int numContours, double range[2])
	Generate numContours equally spaced contour values between specified range.

void	GenerateValues (int numContours, double rangeStart, double rangeEnd)
	Generate numContours equally spaced contour values between specified range.

void	SetContourValues (const std::vector< double > &values)
	Convenience method to set all of the contour values at once.

std::vector< double >	GetContourValues ()
	Convenience method to get all of the contour values at once.


virtual void	SetComputeNormals (int)
	Set/Get the computation of normals.

virtual int	GetComputeNormals ()
	Set/Get the computation of normals.

virtual void	ComputeNormalsOn ()
	Set/Get the computation of normals.

virtual void	ComputeNormalsOff ()
	Set/Get the computation of normals.


virtual void	SetComputeGradients (vtkTypeBool)
	Set/Get the computation of gradients.

virtual vtkTypeBool	GetComputeGradients ()
	Set/Get the computation of gradients.

virtual void	ComputeGradientsOn ()
	Set/Get the computation of gradients.

virtual void	ComputeGradientsOff ()
	Set/Get the computation of gradients.


virtual void	SetComputeScalars (vtkTypeBool)
	Set/Get the computation of scalars.

virtual vtkTypeBool	GetComputeScalars ()
	Set/Get the computation of scalars.

virtual void	ComputeScalarsOn ()
	Set/Get the computation of scalars.

virtual void	ComputeScalarsOff ()
	Set/Get the computation of scalars.


virtual void	SetUseScalarTree (vtkTypeBool)
	Enable the use of a scalar tree to accelerate contour extraction.

virtual vtkTypeBool	GetUseScalarTree ()
	Enable the use of a scalar tree to accelerate contour extraction.

virtual void	UseScalarTreeOn ()
	Enable the use of a scalar tree to accelerate contour extraction.

virtual void	UseScalarTreeOff ()
	Enable the use of a scalar tree to accelerate contour extraction.


virtual void	SetScalarTree (vtkScalarTree *)
	Enable the use of a scalar tree to accelerate contour extraction.

virtual vtkScalarTree *	GetScalarTree ()
	Enable the use of a scalar tree to accelerate contour extraction.


void	SetLocator (vtkIncrementalPointLocator *locator)
	Set / get a spatial locator for merging points.

virtual vtkIncrementalPointLocator *	GetLocator ()
	Set / get a spatial locator for merging points.


virtual void	SetArrayComponent (int)
	Set/get which component of the scalar array to contour on; defaults to 0.

virtual int	GetArrayComponent ()
	Set/get which component of the scalar array to contour on; defaults to 0.


virtual void	SetGenerateTriangles (vtkTypeBool)
	If this is enabled (by default), the output will be triangles otherwise, the output will be the intersection polygon WARNING: if the contour surface is not planar, the output polygon will not be planar, which might be nice to look at but hard to compute with downstream.

virtual vtkTypeBool	GetGenerateTriangles ()
	If this is enabled (by default), the output will be triangles otherwise, the output will be the intersection polygon WARNING: if the contour surface is not planar, the output polygon will not be planar, which might be nice to look at but hard to compute with downstream.

virtual void	GenerateTrianglesOn ()
	If this is enabled (by default), the output will be triangles otherwise, the output will be the intersection polygon WARNING: if the contour surface is not planar, the output polygon will not be planar, which might be nice to look at but hard to compute with downstream.

virtual void	GenerateTrianglesOff ()
	If this is enabled (by default), the output will be triangles otherwise, the output will be the intersection polygon WARNING: if the contour surface is not planar, the output polygon will not be planar, which might be nice to look at but hard to compute with downstream.


virtual void	SetOutputPointsPrecision (int)
	Set/get the desired precision for the output types.

virtual int	GetOutputPointsPrecision ()
	Set/get the desired precision for the output types.


virtual void	SetFastMode (bool)
	Turn on/off fast mode execution.

virtual bool	GetFastMode ()
	Turn on/off fast mode execution.

virtual void	FastModeOn ()
	Turn on/off fast mode execution.

virtual void	FastModeOff ()
	Turn on/off fast mode execution.

Public Member Functions inherited from vtkPolyDataAlgorithm
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkPolyDataAlgorithm *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

vtkTypeBool	ProcessRequest (vtkInformation , vtkInformationVector , vtkInformationVector ) override
	see vtkAlgorithm for details

vtkDataObject *	GetInput ()

vtkDataObject *	GetInput (int port)

vtkPolyData *	GetPolyDataInput (int port)

vtkPolyData *	GetOutput ()
	Get the output data object for a port on this algorithm.

vtkPolyData *	GetOutput (int)
	Get the output data object for a port on this algorithm.

virtual void	SetOutput (vtkDataObject *d)
	Get the output data object for a port on this algorithm.

void	SetInputData (vtkDataObject *)
	Assign a data object as input.

void	SetInputData (int, vtkDataObject *)
	Assign a data object as input.

void	AddInputData (vtkDataObject *)
	Assign a data object as input.

void	AddInputData (int, vtkDataObject *)
	Assign a data object as input.

Public Member Functions inherited from vtkAlgorithm
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkAlgorithm *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

vtkTypeBool	HasExecutive ()
	Check whether this algorithm has an assigned executive.

vtkExecutive *	GetExecutive ()
	Get this algorithm's executive.

virtual void	SetExecutive (vtkExecutive *executive)
	Set this algorithm's executive.

virtual vtkTypeBool	ProcessRequest (vtkInformation request, vtkInformationVector inInfo, vtkInformationVector outInfo)
	Upstream/Downstream requests form the generalized interface through which executives invoke a algorithm's functionality.

vtkTypeBool	ProcessRequest (vtkInformation request, vtkCollection inInfo, vtkInformationVector *outInfo)
	Version of ProcessRequest() that is wrapped.

virtual int	ComputePipelineMTime (vtkInformation request, vtkInformationVector inInfoVec, vtkInformationVector outInfoVec, int requestFromOutputPort, vtkMTimeType *mtime)
	A special version of ProcessRequest meant specifically for the pipeline modified time request.

virtual int	ModifyRequest (vtkInformation *request, int when)
	This method gives the algorithm a chance to modify the contents of a request before or after (specified in the when argument) it is forwarded.

vtkInformation *	GetInputPortInformation (int port)
	Get the information object associated with an input port.

vtkInformation *	GetOutputPortInformation (int port)
	Get the information object associated with an output port.

int	GetNumberOfInputPorts ()
	Get the number of input ports used by the algorithm.

int	GetNumberOfOutputPorts ()
	Get the number of output ports provided by the algorithm.

void	SetAbortExecuteAndUpdateTime ()
	Set AbortExecute Flag and update LastAbortTime.

void	UpdateProgress (double amount)
	Update the progress of the process object.

bool	CheckAbort ()
	Checks to see if this filter should abort.

virtual void	SetInputArrayToProcess (int idx, int port, int connection, const char fieldAssociation, const char attributeTypeorName)
	String based versions of SetInputArrayToProcess().

vtkInformation *	GetInputArrayInformation (int idx)
	Get the info object for the specified input array to this algorithm.

void	RemoveAllInputs ()
	Remove all the input data.

vtkDataObject *	GetOutputDataObject (int port)
	Get the data object that will contain the algorithm output for the given port.

vtkDataObject *	GetInputDataObject (int port, int connection)
	Get the data object that will contain the algorithm input for the given port and given connection.

virtual void	RemoveInputConnection (int port, vtkAlgorithmOutput *input)
	Remove a connection from the given input port index.

virtual void	RemoveInputConnection (int port, int idx)
	Remove a connection given by index idx.

virtual void	RemoveAllInputConnections (int port)
	Removes all input connections.

virtual void	SetInputDataObject (int port, vtkDataObject *data)
	Sets the data-object as an input on the given port index.

virtual void	SetInputDataObject (vtkDataObject *data)

virtual void	AddInputDataObject (int port, vtkDataObject *data)
	Add the data-object as an input to this given port.

virtual void	AddInputDataObject (vtkDataObject *data)

vtkAlgorithmOutput *	GetOutputPort (int index)
	Get a proxy object corresponding to the given output port of this algorithm.

vtkAlgorithmOutput *	GetOutputPort ()

int	GetNumberOfInputConnections (int port)
	Get the number of inputs currently connected to a port.

int	GetTotalNumberOfInputConnections ()
	Get the total number of inputs for this algorithm.

vtkAlgorithmOutput *	GetInputConnection (int port, int index)
	Get the algorithm output port connected to an input port.

vtkAlgorithm *	GetInputAlgorithm (int port, int index, int &algPort)
	Returns the algorithm and the output port index of that algorithm connected to a port-index pair.

vtkAlgorithm *	GetInputAlgorithm (int port, int index)
	Returns the algorithm connected to a port-index pair.

vtkAlgorithm *	GetInputAlgorithm ()
	Equivalent to GetInputAlgorithm(0, 0).

vtkExecutive *	GetInputExecutive (int port, int index)
	Returns the executive associated with a particular input connection.

vtkExecutive *	GetInputExecutive ()
	Equivalent to GetInputExecutive(0, 0)

vtkInformation *	GetInputInformation (int port, int index)
	Return the information object that is associated with a particular input connection.

vtkInformation *	GetInputInformation ()
	Equivalent to GetInputInformation(0, 0)

vtkInformation *	GetOutputInformation (int port)
	Return the information object that is associated with a particular output port.

virtual vtkTypeBool	Update (int port, vtkInformationVector *requests)
	This method enables the passing of data requests to the algorithm to be used during execution (in addition to bringing a particular port up-to-date).

virtual vtkTypeBool	Update (vtkInformation *requests)
	Convenience method to update an algorithm after passing requests to its first output port.

virtual int	UpdatePiece (int piece, int numPieces, int ghostLevels, const int extents[6]=nullptr)
	Convenience method to update an algorithm after passing requests to its first output port.

virtual VTK_UNBLOCKTHREADS int	UpdateExtent (const int extents[6])
	Convenience method to update an algorithm after passing requests to its first output port.

virtual VTK_UNBLOCKTHREADS int	UpdateTimeStep (double time, int piece=-1, int numPieces=1, int ghostLevels=0, const int extents[6]=nullptr)
	Convenience method to update an algorithm after passing requests to its first output port.

virtual VTK_UNBLOCKTHREADS void	UpdateInformation ()
	Bring the algorithm's information up-to-date.

virtual void	UpdateDataObject ()
	Create output object(s).

virtual void	PropagateUpdateExtent ()
	Propagate meta-data upstream.

virtual VTK_UNBLOCKTHREADS void	UpdateWholeExtent ()
	Bring this algorithm's outputs up-to-date.

void	ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
	Convenience routine to convert from a linear ordering of input connections to a port/connection pair.

void	RemoveNoPriorTemporalAccessInformationKey ()
	Removes any information key `vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS()` to all output ports of this `vtkAlgorithm`.

virtual vtkInformation *	GetInformation ()
	Set/Get the information object associated with this algorithm.

virtual void	SetInformation (vtkInformation *)
	Set/Get the information object associated with this algorithm.

bool	UsesGarbageCollector () const override
	Participate in garbage collection.

virtual void	SetAbortExecute (vtkTypeBool)
	Set/Get the AbortExecute flag for the process object.

virtual vtkTypeBool	GetAbortExecute ()
	Set/Get the AbortExecute flag for the process object.

virtual void	AbortExecuteOn ()
	Set/Get the AbortExecute flag for the process object.

virtual void	AbortExecuteOff ()
	Set/Get the AbortExecute flag for the process object.

virtual double	GetProgress ()
	Get the execution progress of a process object.

void	SetContainerAlgorithm (vtkAlgorithm *containerAlg)
	Set/get a Container algorithm for this algorithm.

vtkAlgorithm *	GetContainerAlgorithm ()
	Set/get a Container algorithm for this algorithm.

virtual void	SetAbortOutput (bool)
	Set/Get an internal variable used to communicate between the algorithm and executive.

virtual bool	GetAbortOutput ()
	Set/Get an internal variable used to communicate between the algorithm and executive.

void	SetProgressShiftScale (double shift, double scale)
	Specify the shift and scale values to use to apply to the progress amount when `UpdateProgress` is called.

virtual double	GetProgressShift ()
	Specify the shift and scale values to use to apply to the progress amount when `UpdateProgress` is called.

virtual double	GetProgressScale ()
	Specify the shift and scale values to use to apply to the progress amount when `UpdateProgress` is called.

void	SetProgressText (const char *ptext)
	Set the current text message associated with the progress state.

virtual char *	GetProgressText ()
	Set the current text message associated with the progress state.

virtual unsigned long	GetErrorCode ()
	The error code contains a possible error that occurred while reading or writing the file.

virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
	Set the input data arrays that this algorithm will process.

virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)
	Set the input data arrays that this algorithm will process.

virtual void	SetInputArrayToProcess (int idx, vtkInformation *info)
	Set the input data arrays that this algorithm will process.

virtual void	SetInputConnection (int port, vtkAlgorithmOutput *input)
	Set the connection for the given input port index.

virtual void	SetInputConnection (vtkAlgorithmOutput *input)
	Set the connection for the given input port index.

virtual void	AddInputConnection (int port, vtkAlgorithmOutput *input)
	Add a connection to the given input port index.

virtual void	AddInputConnection (vtkAlgorithmOutput *input)
	Add a connection to the given input port index.

virtual VTK_UNBLOCKTHREADS void	Update (int port)
	Bring this algorithm's outputs up-to-date.

virtual VTK_UNBLOCKTHREADS void	Update ()
	Bring this algorithm's outputs up-to-date.

virtual void	SetReleaseDataFlag (vtkTypeBool)
	Turn release data flag on or off for all output ports.

virtual vtkTypeBool	GetReleaseDataFlag ()
	Turn release data flag on or off for all output ports.

void	ReleaseDataFlagOn ()
	Turn release data flag on or off for all output ports.

void	ReleaseDataFlagOff ()
	Turn release data flag on or off for all output ports.

int	UpdateExtentIsEmpty (vtkInformation pinfo, vtkDataObject output)
	This detects when the UpdateExtent will generate no data This condition is satisfied when the UpdateExtent has zero volume (0,-1,...) or the UpdateNumberOfPieces is 0.

int	UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)
	This detects when the UpdateExtent will generate no data This condition is satisfied when the UpdateExtent has zero volume (0,-1,...) or the UpdateNumberOfPieces is 0.

int *	GetUpdateExtent ()
	These functions return the update extent for output ports that use 3D extents.

int *	GetUpdateExtent (int port)
	These functions return the update extent for output ports that use 3D extents.

void	GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
	These functions return the update extent for output ports that use 3D extents.

void	GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
	These functions return the update extent for output ports that use 3D extents.

void	GetUpdateExtent (int extent[6])
	These functions return the update extent for output ports that use 3D extents.

void	GetUpdateExtent (int port, int extent[6])
	These functions return the update extent for output ports that use 3D extents.

int	GetUpdatePiece ()
	These functions return the update extent for output ports that use piece extents.

int	GetUpdatePiece (int port)
	These functions return the update extent for output ports that use piece extents.

int	GetUpdateNumberOfPieces ()
	These functions return the update extent for output ports that use piece extents.

int	GetUpdateNumberOfPieces (int port)
	These functions return the update extent for output ports that use piece extents.

int	GetUpdateGhostLevel ()
	These functions return the update extent for output ports that use piece extents.

int	GetUpdateGhostLevel (int port)
	These functions return the update extent for output ports that use piece extents.

void	SetProgressObserver (vtkProgressObserver *)
	If an ProgressObserver is set, the algorithm will report progress through it rather than directly.

virtual vtkProgressObserver *	GetProgressObserver ()
	If an ProgressObserver is set, the algorithm will report progress through it rather than directly.

void	SetNoPriorTemporalAccessInformationKey (int key)
	Set to all output ports of this algorithm the information key `vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS()`.

void	SetNoPriorTemporalAccessInformationKey ()
	Set to all output ports of this algorithm the information key `vtkStreamingDemandDrivenPipeline::NO_PRIOR_TEMPORAL_ACCESS()`.

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

bool	GetDebug ()
	Get the value of the debug flag.

void	SetDebug (bool debugFlag)
	Set the value of the debug flag.

virtual void	Modified ()
	Update the modification time for this object.

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

vtkTypeBool	InvokeEvent (unsigned long event)

vtkTypeBool	InvokeEvent (const char *event)

std::string	GetObjectDescription () const override
	The object description printed in messages and PrintSelf output.

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.

vtkTypeBool	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.

vtkTypeBool	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not.

virtual void	SetObjectName (const std::string &objectName)
	Set/get the name of this object for reporting purposes.

virtual std::string	GetObjectName () const
	Set/get the name of this object for reporting purposes.

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.

virtual std::string	GetObjectDescription () const
	The object description printed in messages and PrintSelf output.

virtual vtkTypeBool	IsA (const char *name)
	Return 1 if this class is the same type of (or a subclass of) the named class.

virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

virtual void	Delete ()
	Delete a VTK object.

virtual void	FastDelete ()
	Delete a reference to this object.

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream.

void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).

int	GetReferenceCount ()
	Return the current reference count of this object.

void	SetReferenceCount (int)
	Sets the reference count.

bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

Static Public Member Functions
static vtkTypeBool	IsTypeOf (const char *type)

static vtkContourFilter *	SafeDownCast (vtkObjectBase *o)

static vtkContourFilter *	New ()
	Construct object with initial range (0,1) and single contour value of 0.0.

Static Public Member Functions inherited from vtkPolyDataAlgorithm
static vtkPolyDataAlgorithm *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkPolyDataAlgorithm *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkAlgorithm
static vtkAlgorithm *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkAlgorithm *	SafeDownCast (vtkObjectBase *o)

static vtkInformationIntegerKey *	INPUT_IS_OPTIONAL ()
	Keys used to specify input port requirements.

static vtkInformationIntegerKey *	INPUT_IS_REPEATABLE ()

static vtkInformationInformationVectorKey *	INPUT_REQUIRED_FIELDS ()

static vtkInformationStringVectorKey *	INPUT_REQUIRED_DATA_TYPE ()

static vtkInformationInformationVectorKey *	INPUT_ARRAYS_TO_PROCESS ()

static vtkInformationIntegerKey *	INPUT_PORT ()

static vtkInformationIntegerKey *	INPUT_CONNECTION ()

static vtkInformationIntegerKey *	CAN_PRODUCE_SUB_EXTENT ()
	This key tells the executive that a particular output port is capable of producing an arbitrary subextent of the whole extent.

static vtkInformationIntegerKey *	CAN_HANDLE_PIECE_REQUEST ()
	Key that tells the pipeline that a particular algorithm can or cannot handle piece request.

static vtkInformationIntegerKey *	ABORTED ()

static void	SetDefaultExecutivePrototype (vtkExecutive *proto)
	If the DefaultExecutivePrototype is set, a copy of it is created in CreateDefaultExecutive() using NewInstance().

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes.

static void	SetGlobalWarningDisplay (vtkTypeBool val)
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static vtkTypeBool	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.

static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.

static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkContourFilter ()

	~vtkContourFilter () override

void	ReportReferences (vtkGarbageCollector *) override

int	RequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector) override
	This is called by the superclass.

int	RequestUpdateExtent (vtkInformation , vtkInformationVector , vtkInformationVector ) override
	This is called by the superclass.

int	FillInputPortInformation (int port, vtkInformation *info) override
	Fill the input port information objects for this algorithm.

Protected Member Functions inherited from vtkPolyDataAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkPolyDataAlgorithm ()

	~vtkPolyDataAlgorithm () override

virtual int	RequestInformation (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)

virtual int	RequestData (vtkInformation request, vtkInformationVector inputVector, vtkInformationVector outputVector)
	This is called by the superclass.

virtual int	RequestUpdateExtent (vtkInformation , vtkInformationVector , vtkInformationVector )
	This is called by the superclass.

virtual int	RequestUpdateTime (vtkInformation , vtkInformationVector , vtkInformationVector )
	This is called by the superclass.

int	FillOutputPortInformation (int port, vtkInformation *info) override
	Fill the output port information objects for this algorithm.

int	FillInputPortInformation (int port, vtkInformation *info) override
	Fill the input port information objects for this algorithm.

Protected Member Functions inherited from vtkAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkAlgorithm ()

	~vtkAlgorithm () override

bool	CheckUpstreamAbort ()
	Checks to see if an upstream filter has been aborted.

virtual int	FillInputPortInformation (int port, vtkInformation *info)
	Fill the input port information objects for this algorithm.

virtual int	FillOutputPortInformation (int port, vtkInformation *info)
	Fill the output port information objects for this algorithm.

virtual void	SetNumberOfInputPorts (int n)
	Set the number of input ports used by the algorithm.

virtual void	SetNumberOfOutputPorts (int n)
	Set the number of output ports provided by the algorithm.

int	InputPortIndexInRange (int index, const char *action)

int	OutputPortIndexInRange (int index, const char *action)

int	GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
	Get the association of the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.

vtkInformation *	GetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
	This method takes in an index (as specified in SetInputArrayToProcess) and a pipeline information vector.

virtual vtkExecutive *	CreateDefaultExecutive ()
	Create a default executive.

void	ReportReferences (vtkGarbageCollector *) override

virtual void	SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
	Replace the Nth connection on the given input port.

virtual void	SetNumberOfInputConnections (int port, int n)
	Set the number of input connections on the given input port.

void	SetInputDataInternal (int port, vtkDataObject *input)
	These methods are used by subclasses to implement methods to set data objects directly as input.

void	AddInputDataInternal (int port, vtkDataObject *input)

int	GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature.

int	GetInputArrayAssociation (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature.

vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.

vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.

vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature.

vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
	Filters that have multiple connections on one port can use this signature.

vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature.

vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input, int &association)
	Filters that have multiple connections on one port can use this signature.

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
	Get the actual data array for the input array specified by idx, this is only reasonable during the REQUEST_DATA pass.

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
	Filters that have multiple connections on one port can use this signature.

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
	Filters that have multiple connections on one port can use this signature.

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input)
	Filters that have multiple connections on one port can use this signature.

vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)
	Filters that have multiple connections on one port can use this signature.

virtual void	SetErrorCode (unsigned long)
	The error code contains a possible error that occurred while reading or writing the file.

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events.

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	ReportReferences (vtkGarbageCollector *)

virtual void	ObjectFinalize ()

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Static Protected Member Functions
static void	InternalProgressCallbackFunction (vtkObject caller, unsigned long eid, void clientData, void *callData)

Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKey *	PORT_REQUIREMENTS_FILLED ()

Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Protected Attributes
vtkNew< vtkContourValues >	ContourValues

int	ComputeNormals

vtkTypeBool	ComputeGradients

vtkTypeBool	ComputeScalars

vtkIncrementalPointLocator *	Locator

vtkTypeBool	UseScalarTree

vtkScalarTree *	ScalarTree

int	OutputPointsPrecision

int	ArrayComponent

vtkTypeBool	GenerateTriangles

bool	FastMode

vtkNew< vtkContourGrid >	ContourGrid

vtkNew< vtkContour3DLinearGrid >	Contour3DLinearGrid

vtkNew< vtkFlyingEdges2D >	FlyingEdges2D

vtkNew< vtkFlyingEdges3D >	FlyingEdges3D

vtkNew< vtkGridSynchronizedTemplates3D >	GridSynchronizedTemplates

vtkNew< vtkRectilinearSynchronizedTemplates >	RectilinearSynchronizedTemplates

vtkNew< vtkSynchronizedTemplates2D >	SynchronizedTemplates2D

vtkNew< vtkSynchronizedTemplates3D >	SynchronizedTemplates3D

vtkNew< vtkCallbackCommand >	InternalProgressCallbackCommand

Protected Attributes inherited from vtkAlgorithm
vtkTimeStamp	LastAbortCheckTime

vtkInformation *	Information

double	Progress

char *	ProgressText

vtkProgressObserver *	ProgressObserver

unsigned long	ErrorCode
	The error code contains a possible error that occurred while reading or writing the file.

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

std::string	ObjectName

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Public Attributes inherited from vtkAlgorithm
std::atomic< vtkTypeBool >	AbortExecute

Static Protected Attributes inherited from vtkAlgorithm
static vtkTimeStamp	LastAbortTime

static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

generate isosurfaces/isolines from scalar values

vtkContourFilter is a filter that takes as input any dataset and generates on output isosurfaces and/or isolines. The exact form of the output depends upon the dimensionality of the input data. Data consisting of 3D cells will generate isosurfaces, data consisting of 2D cells will generate isolines, and data with 1D or 0D cells will generate isopoints. Combinations of output type are possible if the input dimension is mixed.

To use this filter you must specify one or more contour values. You can either use the method SetValue() to specify each contour value, or use GenerateValues() to generate a series of evenly spaced contours. It is also possible to accelerate the operation of this filter (at the cost of extra memory) by using a vtkScalarTree. A scalar tree is used to quickly locate cells that contain a contour surface. This is especially effective if multiple contours are being extracted. If you want to use a scalar tree, invoke the method UseScalarTreeOn().

Warning: For unstructured data or structured grids, normals and gradients are not computed. Use vtkPolyDataNormals to compute the surface normals.

See also: vtkFlyingEdges3D vtkFlyingEdges2D vtkDiscreteFlyingEdges3D vtkDiscreteFlyingEdges2D vtkMarchingContourFilter vtkMarchingCubes vtkSliceCubes vtkMarchingSquares vtkImageMarchingCubes vtkContour3DLinearGrid

Examples:: vtkContourFilter (Examples)

Online Examples:

IntermixedUnstructuredGrid

Tests:: vtkContourFilter (Tests)

Definition at line 173 of file vtkContourFilter.h.

Member Typedef Documentation

◆ Superclass

typedef vtkPolyDataAlgorithm vtkContourFilter::Superclass

Definition at line 176 of file vtkContourFilter.h.

Constructor & Destructor Documentation

◆ vtkContourFilter()

vtkContourFilter::vtkContourFilter ( )

protected

◆ ~vtkContourFilter()

vtkContourFilter::~vtkContourFilter ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkContourFilter::IsTypeOf ( const char * type )

static

◆ IsA()

virtual vtkTypeBool vtkContourFilter::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.

Reimplemented in vtkmContour.

◆ SafeDownCast()

static vtkContourFilter * vtkContourFilter::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkContourFilter::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkmContour.

◆ NewInstance()

vtkContourFilter * vtkContourFilter::NewInstance ( ) const

◆ PrintSelf()

void vtkContourFilter::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

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 vtkAlgorithm.

Reimplemented in vtkmContour.

◆ New()

static vtkContourFilter * vtkContourFilter::New ( )

static

Construct object with initial range (0,1) and single contour value of 0.0.

◆ SetValue()

void vtkContourFilter::SetValue	(	int	i,
		double	value
	)

inline

Methods to set / get contour values.

Set a particular contour value at contour number i.

The index i ranges between 0<=i<NumberOfContours.

Definition at line 381 of file vtkContourFilter.h.

◆ GetValue()

double vtkContourFilter::GetValue ( int i )

inline

Get the ith contour value.

Definition at line 389 of file vtkContourFilter.h.

◆ GetValues() [1/2]

double * vtkContourFilter::GetValues ( )

inline

Get a pointer to an array of contour values.

There will be GetNumberOfContours() values in the list.

Definition at line 398 of file vtkContourFilter.h.

◆ GetValues() [2/2]

void vtkContourFilter::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 408 of file vtkContourFilter.h.

◆ SetNumberOfContours()

void vtkContourFilter::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 418 of file vtkContourFilter.h.

◆ GetNumberOfContours()

int vtkContourFilter::GetNumberOfContours ( )

inline

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

Definition at line 426 of file vtkContourFilter.h.

◆ GenerateValues() [1/2]

void vtkContourFilter::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 435 of file vtkContourFilter.h.

◆ GenerateValues() [2/2]

void vtkContourFilter::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 444 of file vtkContourFilter.h.

◆ SetContourValues()

void vtkContourFilter::SetContourValues ( const std::vector< double > & values )

inline

Convenience method to set all of the contour values at once.

Loops over the vector elements and calls SetValue()

Definition at line 453 of file vtkContourFilter.h.

◆ GetContourValues()

std::vector< double > vtkContourFilter::GetContourValues ( )

inline

Convenience method to get all of the contour values at once.

The returned vector is a copy and cannot be used to modify contour values.

Definition at line 468 of file vtkContourFilter.h.

◆ GetMTime()

vtkMTimeType vtkContourFilter::GetMTime ( )

overridevirtual

Modified GetMTime Because we delegate to vtkContourValues.

Reimplemented from vtkObject.

◆ SetComputeNormals()

virtual void vtkContourFilter::SetComputeNormals ( int )

virtual

Set/Get the computation of normals.

Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. This setting defaults to On for vtkImageData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid inputs. For others, it defaults to the special value -1 which indicates that the caller has made no explicit choice and will result in the normals being computed. This behaviour is a holdover for backwards compatibility and you really should set this to 0 or 1.

◆ GetComputeNormals()

virtual int vtkContourFilter::GetComputeNormals ( )

virtual

Set/Get the computation of normals.

Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. This setting defaults to On for vtkImageData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid inputs. For others, it defaults to the special value -1 which indicates that the caller has made no explicit choice and will result in the normals being computed. This behaviour is a holdover for backwards compatibility and you really should set this to 0 or 1.

◆ ComputeNormalsOn()

virtual void vtkContourFilter::ComputeNormalsOn ( )

virtual

Set/Get the computation of normals.

Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. This setting defaults to On for vtkImageData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid inputs. For others, it defaults to the special value -1 which indicates that the caller has made no explicit choice and will result in the normals being computed. This behaviour is a holdover for backwards compatibility and you really should set this to 0 or 1.

◆ ComputeNormalsOff()

virtual void vtkContourFilter::ComputeNormalsOff ( )

virtual

Set/Get the computation of normals.

Normal computation is fairly expensive in both time and storage. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off. This setting defaults to On for vtkImageData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid inputs. For others, it defaults to the special value -1 which indicates that the caller has made no explicit choice and will result in the normals being computed. This behaviour is a holdover for backwards compatibility and you really should set this to 0 or 1.

◆ SetComputeGradients()

virtual void vtkContourFilter::SetComputeGradients ( vtkTypeBool )

virtual

Set/Get the computation of gradients.

Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off.

◆ GetComputeGradients()

virtual vtkTypeBool vtkContourFilter::GetComputeGradients ( )

virtual

Set/Get the computation of gradients.

Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off.

◆ ComputeGradientsOn()

virtual void vtkContourFilter::ComputeGradientsOn ( )

virtual

Set/Get the computation of gradients.

Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off.

◆ ComputeGradientsOff()

virtual void vtkContourFilter::ComputeGradientsOff ( )

virtual

Set/Get the computation of gradients.

Gradient computation is fairly expensive in both time and storage. Note that if ComputeNormals is on, gradients will have to be calculated, but will not be stored in the output dataset. If the output data will be processed by filters that modify topology or geometry, it may be wise to turn Normals and Gradients off.

◆ SetComputeScalars()

virtual void vtkContourFilter::SetComputeScalars ( vtkTypeBool )

virtual

Set/Get the computation of scalars.

◆ GetComputeScalars()

virtual vtkTypeBool vtkContourFilter::GetComputeScalars ( )

virtual

Set/Get the computation of scalars.

◆ ComputeScalarsOn()

virtual void vtkContourFilter::ComputeScalarsOn ( )

virtual

Set/Get the computation of scalars.

◆ ComputeScalarsOff()

virtual void vtkContourFilter::ComputeScalarsOff ( )

virtual

Set/Get the computation of scalars.