Given a fiber surface control polygon (FSCP) and an unstructured grid composed of tetrahedral cells with two scalar arrays, this filter computes the corresponding fiber surfaces. More...

#include <vtkFiberSurface.h>

Inheritance diagram for vtkFiberSurface:

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Collaboration diagram for vtkFiberSurface:

[legend]

Public Types
enum	BaseVertexType { bv_not_used , bv_vertex_0 , bv_vertex_1 , bv_vertex_2 , bv_vertex_3 , bv_edge_01 , bv_edge_02 , bv_edge_03 , bv_edge_12 , bv_edge_13 , bv_edge_23 }
	This structure lists the vertices to use for the marching tetrahedra, Some of these vertices need to be interpolated, but others are the vertices of the tetrahedron already, and for this we need to store the type of vertex. More...

enum	ClipVertexType { not_used , vertex_0 , vertex_1 , vertex_2 , edge_0_parm_0 , edge_1_parm_0 , edge_2_parm_0 , edge_0_parm_1 , edge_1_parm_1 , edge_2_parm_1 }
	After generating the base fiber surface in each cell, we need a further clipping process to obtain the accurate fiber surface. More...

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.

vtkFiberSurface *	NewInstance () const

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

void	SetField1 (const char *fieldName)
	Specify the first field name to be used in this filter.

void	SetField2 (const char *fieldName)
	Specify the second field name to be used in the filter.

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.

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 vtkFiberSurface *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkFiberSurface *	SafeDownCast (vtkObjectBase *o)

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 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

	vtkFiberSurface ()

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

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

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.

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

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
const char *	Fields [2]

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 fiber surface control polygon (FSCP) and an unstructured grid composed of tetrahedral cells with two scalar arrays, this filter computes the corresponding fiber surfaces.

Introduction

Fiber surfaces are constructed from sets of fibers, the multivariate analogues of isolines. The original paper [0] offers a general purpose method that produces separating surfaces representing boundaries in bivariate fields. This filter is based on an improvement over [0] which computes accurate and exact fiber surfaces. It can handle arbitrary input polygons including open polygons or self-intersecting polygons. The current implementation can better captures sharp features induced by polygon bends [1].

[0] Hamish Carr, Zhao Geng, Julien Tierny, Amit Chattopadhyay and Aaron Knoll, Fiber Surfaces: Generalizing Isosurfaces to Bivariate Data, Computer Graphics Forum, Volume 34, Issue 3, Pages 241-250, (EuroVis 2015)

[1] Pavol Klacansky, Julien Tierny, Hamish Carr, Zhao Geng, Fast and Exact Fiber Surfaces for Tetrahedral Meshes, Paper in submission, 2015

Algorithm For Extracting An Exact Fiber Surface

Require: R.1 A 3D domain space represented by an unstructured grid composed of tetrahedral cells R.2 Two scalar fields, f1 and f2, that map the domain space to a 2D range space. These fields are assumed to be known at vertices of the unstructured grid: i.e they are two fields associated with the unstructured grid. R.3 A Fiber Surface Control Polygon (FSCP) defined in the range space as a list of line segments (l1, l2, ..., ln). The FSCP may be an open polyline or a self-intersecting polygon.

For each line segment l in FSCP, we ignore the endpoints of the line and assume this line extends to infinity. This line will then separate the range and its inverse image, i.e fiber surfaces, will also separate the domain. Based on the signed distance d between the image of a cell vertex v and line l in the range, v can be classified as white (d < 0), grey (d == 0) or black (d>0). The interpolation parameter between two vertices v1 and v2 in a cell edge can be computed as |d1| / (|d2|+|d1|), where d1 and d2 are the signed distances between images of v1,v2 and line l in the range. Once the classification and interpolation parameters for all vertices in a cell are known, then we can apply the Marching Tetrahedra algorithm. For each tetrahedron, this produces a planar cut which we refer to as a base fiber surface.
After generating the base fiber surface in each cell, we need a further clipping process to obtain the accurate fiber surface. Clipping is based on classifying the vertices of each triangle as follows: Given a line segment in the fiber surface control polygon (FSCP) parameterised from 0 to 1, we know that every triangle vertex in the base fiber surface belongs to the fiber surface, and that the fiber through each vertex can be parameterised with respect to the line segment. Therefore, we compute the parameter t for each vertex and use it to classify the vertex as: 0: t < 0 Vertex is below the clipping range [0,1] and will be removed 1: 0 ≤ t ≤ 1 Vertex is inside the clipping range [0,1] and is retained 2: 1 < t Vertex is above the clipping range [0,1] and will be removed Based on the classification, we can further clip the triangle to obtain the final surface.
Repeating steps 1 and 2 for every line segment in FSCP and iterating through each cell will generate the final fiber surfaces in the domain.

Filter Design

As stated in part B (R.1), we will compute the fiber surface over an unstructured grid. This grid will have to be an input of the VTK filter. The two scalar fields, however, are assumed to be stored in the VTK unstructured grid, and will be specified using the SetField1() and SetField2() accessors. The FSCP will be passed into the filter as a second input port. The data type of FSCP is required to be a vtkPolyData, with each of its cell defined as a line segment and its point coordinates defined in the range of the bivariate fields of the input grid.

Tables

tetrahedra with grey cases

In this filter, we have added one vertex classification in Marching Tetrahedra. The reason is because we need a grey classification to ensure that surfaces coincident with the boundary of the tetrahedra will also be included in the output. Given an iso-value, each vertex on the tetrahedron can be classified into three types, including equal-(G)rey, below-(W)hite or above-(B)lack the isovalue. The notation of the classifications are represented as: W or 0 — below an iso-value G or 1 — equal an iso-value B or 2 — above an iso-value The following illustration summarises all of the surface cases (Asterisk * is used to highlight the outline of the triangle): Case A (no triangles): 0000 No triangle is generated.

  W
 ...
. . .

. . . . .W. . . . . . W...........W

Case B (one grey vertex): 0001, 0010, 0100, 1000 Only a vertex is kept, no triangle is generated. W ... . . . . . . . .G. . . . . . W...........W

Case C (one grey edge): 0011, 0101, 0110, 1001, 1010, 1100 Only an edge is kept, no triangle is generated. G ... . . . . . . . .G. . . . . . W...........W

Case D (standard triangle case): 0002, 0020, 0200, 2000 One triangle is generated W W ... ... . . . . * . . . . . *.* . . .B. . -> . * B * . . . . . . ** * ** . W...........W W...........W

Case E (one grey face): 0111, 1011, 1101, 1110 The triangle on one face of the tetra is generated. G G ... .** . . . . * * . . . -> . * * . .G. . . .G* * . . . . . . * * W...........G W...........G

Case F (triangle through vertex): 0012 0021 0102 0120 0201 0210 1002 1020 1200 2001 2010 2100 A triangle connecting one of the tetra vertex is generated. G G ... .*. . . . .*.*. . . . -> . *.* . . .B. . . *.B.* . . . . . . * * * * . W...........W W...........W

Case G (grey tet - treat as empty): 1111 No triangle is generated. G ... . . . . . . . .G. . . . . . G...........G

Case H (triangle through edge): 0112 0121 0211 1012 1021 1102 1120 1201 1210 2011 2101 2110 A triangle containing an edge of the tetra is generated.

  G                                      G
 ...                                    ..*
. . .                                  . . *

. . . . *. * . . . . . * . . . -> . * . * . . W . . . . W . * . . . . . * . * . . . . . . * . * B.............. G B...............G

Case I (standard quad case): 0022 0202 0220 2002 2020 2200 A quand is generated, which can be split to two triangles.

   W                                      W
  ...                                    ...
 . . .                                  . . .
.  .  .                                .  .  .

. . . * *. * * . . . -> .* . *. . . W . . . * . W . * . . . . . . * * * * . . . . . . . . . B.............. B B..................B

Case J (complement of Case E): 1112 1121 1211 2111 Case K (complement of Case F): 0122 0212 0221 1022 1202 1220 2012 2021 2102 2120 2201 2210 Case L (complement of Case C): 1122 1212 1221 2112 2121 2211 Case M (complement of Case D): 0222 2022 2202 2220 Case N (complement of Case B): 1222 2122 2212 2221 Case O (complement of Case A): 2222

cases of the base fiber surface

After generating the base fiber surface in each cell, we need a further clipping process to obtain the accurate fiber surface. Clipping is based on classifying the vertices of each triangle to several cases, which will be described in this section. In order to keep things consistent, we assume that the vertices are ordered CCW, and that edges are numbered according to the opposing vertex:

 v0
/  \

e2 e1 / \ v1—e0—v2

There are six cases for clipping the base fiber surface (subject to the usual

symmetries & complementarity)

Case A (No triangles): Cases 000 & 222 Here, the entire triangle is discarded

000(A): 0 . . . . . . . . . . 0...........0

Case B (Point-triangle): Cases 001, 010, 100, 122, 212, 221 One vertex is kept, and a single triangle is extracted

001(B): 1 / \ / \ E--—E . . . . 0...........0

Case C (Edge Quad): Cases 011, 101, 110, 112, 121, 211 Two vertices are kept, and a quad is extracted based on the edge

011(C): 1 /|\ / | \ / | E / | / . / |/ . 1--—E.....0

Case D (Stripe): Cases 002, 020, 022, 200, 202, 220 No vertices are kept, but a stripe across the middle is generated

022(D): 2 . . . E . /|\ . / | E . / |/ . 2...E—E...0

Case E (Point-Stripe): Cases 012, 021, 102, 120, 201, 210 One vertex is kept, with a stripe through the triangle

021(E): 1 / \ E—E .|\ |. . | \ | . . | | . 2...E—E...0

Case F (Entire): Case 111 All three vertices are kept, along with the triangle

111(F): 1 / \ / \ / \ / \ / \ 1--------—1

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. Assume the "inputPoly" is a valid input polygon. Given these input above, this filter can be used as follows in c++ sample code:

vtkSmartPointer<vtkFiberSurface> fiberSurface =
                       vtkSmartPointer<vtkFiberSurface>::New();
fiberSurface->SetInputData(0,inputData);
fiberSurface->SetInputData(1,inputPoly);
fiberSurface->SetField1("f1");
fiberSurface->SetField2("f2");
fiberSurface->Update();

The filter output which can be called by "fiberSurface->GetOutput()", will be a vtkPolyData containing the output fiber surfaces.

Definition at line 322 of file vtkFiberSurface.h.

Member Typedef Documentation

◆ Superclass

typedef vtkPolyDataAlgorithm vtkFiberSurface::Superclass

Definition at line 326 of file vtkFiberSurface.h.

Member Enumeration Documentation

◆ BaseVertexType

enum vtkFiberSurface::BaseVertexType

This structure lists the vertices to use for the marching tetrahedra, Some of these vertices need to be interpolated, but others are the vertices of the tetrahedron already, and for this we need to store the type of vertex.

bv_not_used: Symbol for an unused entry bv_vertex_*: Vertices on a tetrahedron bv_edge_*: Vertices on the edges of a tetrahedron

Enumerator
bv_not_used
bv_vertex_0
bv_vertex_1
bv_vertex_2
bv_vertex_3
bv_edge_01
bv_edge_02
bv_edge_03
bv_edge_12
bv_edge_13
bv_edge_23

Definition at line 347 of file vtkFiberSurface.h.

◆ ClipVertexType

enum vtkFiberSurface::ClipVertexType

After generating the base fiber surface in each cell, we need a further clipping process to obtain the accurate fiber surface.

Clipping is based on classifying the vertices of each triangle, this structure lists the type of vertices to be used for the clipping triangles. Some of these vertices need to be interpolated, but others are the vertices of the triangle already, and for this we need to store the type of vertex. Moreover, vertices along the edges of the triangle may be interpolated either at parameter value 0 or at parameter value 1. In other words, there are three classes of vertex with three choices of each, with a total of nine vertices. We therefore store an ID code for each possibility as follows:

Enumerator
not_used
vertex_0
vertex_1
vertex_2
edge_0_parm_0
edge_1_parm_0
edge_2_parm_0
edge_0_parm_1
edge_1_parm_1
edge_2_parm_1

Definition at line 374 of file vtkFiberSurface.h.

Constructor & Destructor Documentation

◆ vtkFiberSurface()

vtkFiberSurface::vtkFiberSurface ( )

protected

Member Function Documentation

◆ New()

static vtkFiberSurface * vtkFiberSurface::New ( )

static

◆ IsTypeOf()

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

static

◆ IsA()

virtual vtkTypeBool vtkFiberSurface::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.

◆ SafeDownCast()

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

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkFiberSurface::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkPolyDataAlgorithm.

◆ NewInstance()

vtkFiberSurface * vtkFiberSurface::NewInstance ( ) const

◆ PrintSelf()

void vtkFiberSurface::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 vtkPolyDataAlgorithm.

◆ SetField1()

void vtkFiberSurface::SetField1 ( const char * fieldName )

Specify the first field name to be used in this filter.

◆ SetField2()

void vtkFiberSurface::SetField2 ( const char * fieldName )

Specify the second field name to be used in the filter.

◆ FillInputPortInformation()

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

overrideprotectedvirtual

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.

◆ RequestData()

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

overrideprotectedvirtual

This is called by the superclass.

This is the method you should override.

Reimplemented from vtkPolyDataAlgorithm.

Member Data Documentation

◆ Fields

const char* vtkFiberSurface::Fields[2]

protected

Definition at line 394 of file vtkFiberSurface.h.

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

Filters/Topology/vtkFiberSurface.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Introduction

Algorithm For Extracting An Exact Fiber Surface

Filter Design

Tables

tetrahedra with grey cases

cases of the base fiber surface

symmetries & complementarity)

to use this filter

Member Typedef Documentation

◆ Superclass

Member Enumeration Documentation

◆ BaseVertexType

◆ ClipVertexType

Constructor & Destructor Documentation

◆ vtkFiberSurface()

Member Function Documentation

◆ New()

◆ IsTypeOf()

◆ IsA()

◆ SafeDownCast()

◆ NewInstanceInternal()

◆ NewInstance()

◆ PrintSelf()

◆ SetField1()

◆ SetField2()

◆ FillInputPortInformation()

◆ RequestData()

Member Data Documentation

◆ Fields