vtkContinuousScatterplot Class Reference

Given a 3D domain space represented by an unstructured grid composed of tetrahedral cells with bivariate fields, this filter tessellates each cell in the domain to polyhedral fragments by intersecting the projection of the cell into 2-D range space against two sets of cutting planes, one set is defined along the first field, the second set is defined along the second field. More...

#include <vtkContinuousScatterplot.h>

Inheritance diagram for vtkContinuousScatterplot:

Collaboration diagram for vtkContinuousScatterplot:

Public Types
typedef vtkImageAlgorithm	Superclass
Public Types inherited from vtkImageAlgorithm
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.
vtkContinuousScatterplot *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.
virtual double	GetEpsilon ()
	Get the tolerance used when comparing floating point numbers for equality.
virtual void	SetEpsilon (double)
	Set the tolerance used when comparing floating point numbers for equality.
void	SetField1 (const char *fieldName, vtkIdType ResX)
	Specify the name of the first field to be used in subdividing the dataset.
void	SetField2 (const char *fieldName, vtkIdType ResY)
	Specify the name of the second field to be used in subdividing the dataset.
Public Member Functions inherited from vtkImageAlgorithm
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.
vtkImageAlgorithm *	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
	Process a request from the executive.
vtkImageData *	GetOutput ()
	Get the output data object for a port on this algorithm.
vtkImageData *	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.
vtkDataObject *	GetInput (int port)
	Get a data object for one of the input port connections.
vtkDataObject *	GetInput ()
	Get a data object for one of the input port connections.
vtkImageData *	GetImageDataInput (int port)
	Get a data object for one of the input port connections.
virtual void	AddInputData (vtkDataObject *)
	Assign a data object as input.
virtual 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.
int	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	SetProgress (double)
	SetProgress is deprecated.
void	UpdateProgress (double amount)
	Update the progress of the process object.
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 int	UpdateExtent (const int extents[6])
	Convenience method to update an algorithm after passing requests to its first output port.
virtual 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 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 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.
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.
void	Register (vtkObjectBase *o) override
	Participate in garbage collection.
void	UnRegister (vtkObjectBase *o) 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	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 void	Update (int port)
	Bring this algorithm's outputs up-to-date.
virtual void	Update ()
	Bring this algorithm's outputs up-to-date.
virtual void	SetReleaseDataFlag (int)
	Turn release data flag on or off for all output ports.
virtual int	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.
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)
int	InvokeEvent (unsigned long event)
int	InvokeEvent (const char *event)
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.
int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
int	InvokeEvent (const char *event, void *callData)
	This method invokes an event and return whether the event was aborted or not.
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.
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.
virtual 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 vtkContinuousScatterplot *	New ()
static vtkTypeBool	IsTypeOf (const char *type)
static vtkContinuousScatterplot *	SafeDownCast (vtkObjectBase *o)
Static Public Member Functions inherited from vtkImageAlgorithm
static vtkTypeBool	IsTypeOf (const char *type)
static vtkImageAlgorithm *	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 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 (int 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 int	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
	vtkContinuousScatterplot ()
int	FillInputPortInformation (int port, vtkInformation *info) override
	These method should be reimplemented by subclasses that have more than a single input or single output.
int	FillOutputPortInformation (int port, vtkInformation *info) override
	These method should be reimplemented by subclasses that have more than a single input or single output.
int	RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *) override
	This is called in response to a REQUEST_DATA request from the executive.
Protected Member Functions inherited from vtkImageAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkImageAlgorithm ()
	~vtkImageAlgorithm () override
virtual int	RequestInformation (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
	Subclasses can reimplement this method to collect information from their inputs and set information for their outputs.
virtual int	RequestUpdateExtent (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
	Subclasses can reimplement this method to translate the update extent requests from each output port into update extent requests for the input connections.
virtual void	CopyInputArrayAttributesToOutput (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
	Convenience method to copy the scalar type and number of components from the input data to the output data.
virtual int	RequestData (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
	This is called in response to a REQUEST_DATA request from the executive.
virtual void	ExecuteDataWithInformation (vtkDataObject *output, vtkInformation *outInfo)
	This is a convenience method that is implemented in many subclasses instead of RequestData.
virtual void	CopyAttributeData (vtkImageData *in, vtkImageData *out, vtkInformationVector **inputVector)
	Copy the other point and cell data.
virtual void	ExecuteData (vtkDataObject *output)
	This method is the old style execute method, provided for the sake of backwards compatibility with older filters and readers.
virtual void	Execute ()
	This method is the old style execute method, provided for the sake of backwards compatibility with older filters and readers.
virtual void	AllocateOutputData (vtkImageData *out, vtkInformation *outInfo, int *uExtent)
	Allocate the output data.
virtual vtkImageData *	AllocateOutputData (vtkDataObject *out, vtkInformation *outInfo)
	Allocate the output data.
Protected Member Functions inherited from vtkAlgorithm
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkAlgorithm ()
	~vtkAlgorithm () override
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 assocition 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 *)
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Protected Attributes
double	Epsilon
const char *	Fields [2]
vtkIdType	ResX
vtkIdType	ResY
Protected Attributes inherited from vtkAlgorithm
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
Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount
vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Public Attributes inherited from vtkAlgorithm
vtkTypeBool	AbortExecute
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 ()
Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

Given a 3D domain space represented by an unstructured grid composed of tetrahedral cells with bivariate fields, this filter tessellates each cell in the domain to polyhedral fragments by intersecting the projection of the cell into 2-D range space against two sets of cutting planes, one set is defined along the first field, the second set is defined along the second field.

The volume of these subdivided polyhedral fragments can be computed and aggregated over cells to depict the density distribution of the data projection in the bivariate range space.

Introduction

Given a bivariate field (f1,f2) defined on an unstructured grid which is composed of tetrahedral cells, we can initially subdivide each cell based on its projection in the range into a number of fragments along the first field f1, we refer to these polyhedral fragments as Frag(f1) = {frag(f1)_1, frag(f1)_2, ... , frag(f1)_n}, where frag(f1)_n refers to the nth fragment along the first field subdivision. Each fragment has a range value and the value difference between the neighbouring fragments is represented as fragment width fw_f1, which is uniformly distributed across the range. Based on the structure of Frag(f1), for each of its cell "frag(f1)_n", we can further subdivide this cell based on the second field f2 using fragment width fw_f2. The tessellation along the second field results in an even finer fragment collection which we refer to as Frag(f1,f2) = {frag(f1,f2)_1, frag(f1,f2)_2, ... , frag(f1,f2)_m}. We can observe that Frag(f1,f2) is a finer tessellation of the domain than Frag(f1) and will be used to compute the density distribution in the bivariate range space. The algorithm for fragment computation is similar to the first stage of the work in [0]. Each fragment "s" in Frag(f1,f2) has range values (f1(s), f2(s)) in the bivariate fields. These values can be further mapped to a 2-D bin with a resolution rexX * resY. The mapped bin index (binIndexX, binIndexY) of the fragment can be computed by linear interpolation on its range values : binIndexX = (int) resX * (f1(s) - f1_min) / (f1_max - f1_min) binIndexY = (int) resY * (f2(s) - f2_min) / (f2_max - f2_min), where (f1_min, f1_max) is the range in first field. Once we know which bin a fragment coincides, the density value in each bin equals to the total geometric volume of the fragments in this bin. This volume distribution over the bins will be exported as a point data array in the output data structure. If we map this 2-D bin to a 2-D image with each bin corresponding to a pixel and bin density to pixel transparency, then the image can be displayed as a continuous scatterplot.

Algorithm

The algorithm of this filter can be described as: Require: R.1 The domain space is an unstructured grid data set composed of tetrahedral cells; R.2 The range space contains two scalar fields, say f1 and f2.

The most important step is to compute the fragments. The implementation processes the input grid one cell at a time, explicitly computing the intersection of the cell with the cutting planes defined by the fragment boundaries in each scalar field. In order to subdivide the cell, we need to define a list of cutting planes in each field. The interval between neighbouring cutting planes is related to the output 2-D bin resolution (resX, resY) and can be computed as : fw_f1 = (f1_max - f1_min) / resX fw_f2 = (f2_max - f2_min) / resY, where (f1_max,f1_min) is the scalar range of first field.

1. For each tetrahedron T in the input grid:

   1.1 Subdivide the cell T based on the first field f1, we will obtain a list of fragments: Frag(f1) = {frag(f1)_1, frag(f1)_2, ... , frag(f1)_n}. The steps for subdivision can be described as:

   1.1.1 For each cutting plane s with respect to the first field f1, its field value f1(s) = f1_min + n * fw_f1, where n refers to the n-th cutting plane:

   1.1.2. Traverse each edge e starting from point a to b in the cell, we will maintain three data classes, namely fragmentFace, residualFace and cutSet: A. fragmentFace contains vertices in the current fragment. B. cutSet contains vertices whose range values equal to f1(s). This set contains the current cutting plane. C. residualFace contains the rest of the vertices in the cell. In order to classify edge vertices into these classes, the following case table is used for each vertex "a" : case 0 : f1(a)---— f1(s) ---—f1(b) condition: f1(a) < f1(s) , f1(b) > f1(s) class: p(s,e), a -> fragmentFace p(s,e) -> cutSet p(s,e) -> residualFace

   case 1 : f1(b)---— f1(s) ---—f1(a) condition: f1(a) > f1(s) , f1(b) < f1(s) class: p(s,e) -> fragmentFace p(s,e) -> cutSet a -> residualFace

   case 2 : f1(s),f1(a)----------------—f1(b) condition: f1(s) == f1(a), f1(s) <= f1(b) class: a -> fragmentFace a -> residualFace a -> cutSet

   case 3 : f1(a)----------------—f1(b), f1(s) condition: f1(s) > f1(a), f1(s) == f1(b) class: a -> fragmentFace

   case 4 : f1(s),f1(b)----------------—f1(a) condition: f1(s) < f1(a), f1(s) == f1(b) class: a -> residualFace Remark: 1. we use "->" to indicate "belongs to" relation.

   1. p(s,e) refers to the interpolated point of range value f1(s) on the edge e.

   1.1.3. After we have traversed every edge in a cell for the cutting plane s, three classes for storing fragment, cutting plane and residual faces are updated. The faces of the current fragment frag(f1) are the union of all elements in fragmentFace and cutSet.

1.2 Take the output of step 1.1, traverse each fragment in Frag(f1), define a list of cutting planes with respect to field f2, further subdivide the fragments in Frag(f1) following steps from 1.1.2 to 1.1.3. The output of this step will be the fragment collection Frag(f1,f2). Each fragment in Frag(f1,f2) can be further mapped to a 2-D bin based on its range values. The density value in each bin equals to the total geometric volume of the fragments in this bin. This volume distribution over the bins will be exported as a point data array in the output data structure.

VTK Filter Design

The input and output ports of the filter: Input port : the input data set should be a vtkUnstructuredGrid, with each of its cell defined as a tetrahedron. At least two scalar fields are associated with the data. The user needs to specify the name of the two scalar arrays beforehand. Output port: the output data set is a 2D image stored as a vtkImageData. The resolution of the output image can be set by the user. The volume distribution of fragments in each pixel or bin is stored in an point data array named "volume" in the output vtkImageData.

How To Use This Filter

Suppose we have a tetrahedral mesh stored in a vtkUnstructuredGrid, we call this data set "inputData". This data set has two scalar arrays whose names are "f1" and "f2" respectively. We would like the resolution of output image set to (resX,resY). Given these input, this filter can be called as follows in c++ sample code:

vtkSmartPointer<vtkContinuousScatterplot> csp =
                       vtkSmartPointer<vtkContinuousScatterplot>::New();
csp->SetInputData(inputData);
csp->SetField1("f1",resX);
csp->SetField2("f2",resY);
csp->Update();

Then the output, "csp->GetOutput()", will be a vtkImageData containing a scalar array whose name is "volume". This array contains the volume distribution of the fragments.

[0] H.Carr and D.Duke, Joint contour nets: Topological analysis of multivariate data. IEEE Transactions on Visualization and Computer Graphics, volume 20, issue 08, pages 1100-1113, 2014

Tests:

vtkContinuousScatterplot (Tests)

Definition at line 178 of file vtkContinuousScatterplot.h.

Member Typedef Documentation

Superclass

typedef vtkImageAlgorithm vtkContinuousScatterplot::Superclass

Definition at line 182 of file vtkContinuousScatterplot.h.

Constructor & Destructor Documentation

vtkContinuousScatterplot()

vtkContinuousScatterplot::vtkContinuousScatterplot ( )

protected

Member Function Documentation

New()

static vtkContinuousScatterplot * vtkContinuousScatterplot::New ( )

static

IsTypeOf()

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

static

IsA()

virtual vtkTypeBool vtkContinuousScatterplot::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 vtkImageAlgorithm.

SafeDownCast()

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

static

NewInstanceInternal()

virtual vtkObjectBase * vtkContinuousScatterplot::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkImageAlgorithm.

NewInstance()

vtkContinuousScatterplot * vtkContinuousScatterplot::NewInstance

(

)

const

PrintSelf()

void vtkContinuousScatterplot::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 vtkImageAlgorithm.

GetEpsilon()

virtual double vtkContinuousScatterplot::GetEpsilon ( )

virtual

Get the tolerance used when comparing floating point numbers for equality.

SetEpsilon()

virtual void vtkContinuousScatterplot::SetEpsilon ( double  )

virtual

Set the tolerance used when comparing floating point numbers for equality.

SetField1()

void vtkContinuousScatterplot::SetField1	(	const char *	fieldName,
		vtkIdType	ResX
	)

Specify the name of the first field to be used in subdividing the dataset.

Specify the resolution along x axis of the output image.

SetField2()

void vtkContinuousScatterplot::SetField2	(	const char *	fieldName,
		vtkIdType	ResY
	)

Specify the name of the second field to be used in subdividing the dataset.

Specify the resolution along y axis of the output image.

FillInputPortInformation()

int vtkContinuousScatterplot::FillInputPortInformation ( int  port, vtkInformation *  info  )

overrideprotectedvirtual

These method should be reimplemented by subclasses that have more than a single input or single output.

See vtkAlgorithm for more information.

Reimplemented from vtkImageAlgorithm.

FillOutputPortInformation()

int vtkContinuousScatterplot::FillOutputPortInformation ( int  port, vtkInformation *  info  )

overrideprotectedvirtual

These method should be reimplemented by subclasses that have more than a single input or single output.

See vtkAlgorithm for more information.

Reimplemented from vtkImageAlgorithm.

RequestData()

int vtkContinuousScatterplot::RequestData ( vtkInformation *  request, vtkInformationVector **  inputVector, vtkInformationVector *  outputVector  )

overrideprotectedvirtual

This is called in response to a REQUEST_DATA request from the executive.

Subclasses should override either this method or the ExecuteDataWithInformation method in order to generate data for their outputs. For images, the output arrays will already be allocated, so all that is necessary is to fill in the voxel values.

Reimplemented from vtkImageAlgorithm.

Member Data Documentation

Epsilon

double vtkContinuousScatterplot::Epsilon

protected

Definition at line 218 of file vtkContinuousScatterplot.h.

Fields

const char* vtkContinuousScatterplot::Fields[2]

protected

Definition at line 221 of file vtkContinuousScatterplot.h.

ResX

vtkIdType vtkContinuousScatterplot::ResX

protected

Definition at line 224 of file vtkContinuousScatterplot.h.

ResY

vtkIdType vtkContinuousScatterplot::ResY

protected

Definition at line 224 of file vtkContinuousScatterplot.h.

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

• Infovis/Core/vtkContinuousScatterplot.h