vtkFlyingEdges2D Class Reference

generate isoline(s) from a structured points set More...

#include <vtkFlyingEdges2D.h>

Inheritance diagram for vtkFlyingEdges2D:

Collaboration diagram for vtkFlyingEdges2D:

Public Types
typedef vtkPolyDataAlgorithm	Superclass
Public Types inherited from vtkPolyDataAlgorithm
typedef vtkAlgorithm	Superclass
Public Types inherited from vtkAlgorithm
typedef vtkObject	Superclass
enum	DesiredOutputPrecision { SINGLE_PRECISION, DOUBLE_PRECISION, DEFAULT_PRECISION }
Public Types inherited from vtkObject
typedef vtkObjectBase	Superclass

Public Member Functions
virtual int	IsA (const char *type)
vtkFlyingEdges2D *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
unsigned long int	GetMTime ()
void	SetValue (int i, double value)
double	GetValue (int i)
double *	GetValues ()
void	GetValues (double *contourValues)
void	SetNumberOfContours (int number)
int	GetNumberOfContours ()
void	GenerateValues (int numContours, double range[2])
void	GenerateValues (int numContours, double rangeStart, double rangeEnd)
virtual void	SetComputeScalars (int)
virtual int	GetComputeScalars ()
virtual void	ComputeScalarsOn ()
virtual void	ComputeScalarsOff ()
virtual void	SetArrayComponent (int)
virtual int	GetArrayComponent ()
Public Member Functions inherited from vtkPolyDataAlgorithm
vtkPolyDataAlgorithm *	NewInstance () const
vtkDataObject *	GetInput ()
vtkDataObject *	GetInput (int port)
vtkPolyData *	GetPolyDataInput (int port)
vtkPolyData *	GetOutput ()
vtkPolyData *	GetOutput (int)
virtual void	SetOutput (vtkDataObject *d)
virtual int	ProcessRequest (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
void	SetInputData (vtkDataObject *)
void	SetInputData (int, vtkDataObject *)
void	AddInputData (vtkDataObject *)
void	AddInputData (int, vtkDataObject *)
Public Member Functions inherited from vtkAlgorithm
vtkAlgorithm *	NewInstance () const
int	HasExecutive ()
vtkExecutive *	GetExecutive ()
virtual void	SetExecutive (vtkExecutive *executive)
virtual int	ModifyRequest (vtkInformation *request, int when)
vtkInformation *	GetInputPortInformation (int port)
vtkInformation *	GetOutputPortInformation (int port)
int	GetNumberOfInputPorts ()
int	GetNumberOfOutputPorts ()
void	UpdateProgress (double amount)
vtkInformation *	GetInputArrayInformation (int idx)
void	RemoveAllInputs ()
vtkDataObject *	GetOutputDataObject (int port)
virtual void	RemoveInputConnection (int port, vtkAlgorithmOutput *input)
virtual void	RemoveInputConnection (int port, int idx)
virtual void	RemoveAllInputConnections (int port)
int	GetNumberOfInputConnections (int port)
int	GetTotalNumberOfInputConnections ()
vtkAlgorithmOutput *	GetInputConnection (int port, int index)
vtkAlgorithm *	GetInputAlgorithm (int port, int index, int &algPort)
vtkAlgorithm *	GetInputAlgorithm (int port, int index)
vtkExecutive *	GetInputExecutive (int port, int index)
vtkInformation *	GetInputInformation (int port, int index)
vtkInformation *	GetOutputInformation (int port)
virtual void	UpdateInformation ()
virtual void	UpdateDataObject ()
virtual void	PropagateUpdateExtent ()
virtual void	UpdateWholeExtent ()
void	ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
int	SetUpdateExtentToWholeExtent (int port)
int	SetUpdateExtentToWholeExtent ()
void	SetUpdateExtent (int port, int extent[6])
int	ProcessRequest (vtkInformation *request, vtkCollection *inInfo, vtkInformationVector *outInfo)
virtual int	ComputePipelineMTime (vtkInformation *request, vtkInformationVector **inInfoVec, vtkInformationVector *outInfoVec, int requestFromOutputPort, unsigned long *mtime)
virtual vtkInformation *	GetInformation ()
virtual void	SetInformation (vtkInformation *)
virtual void	Register (vtkObjectBase *o)
virtual void	UnRegister (vtkObjectBase *o)
virtual void	SetAbortExecute (int)
virtual int	GetAbortExecute ()
virtual void	AbortExecuteOn ()
virtual void	AbortExecuteOff ()
virtual void	SetProgress (double)
virtual double	GetProgress ()
void	SetProgressText (const char *ptext)
virtual char *	GetProgressText ()
virtual unsigned long	GetErrorCode ()
virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, const char *name)
virtual void	SetInputArrayToProcess (int idx, int port, int connection, int fieldAssociation, int fieldAttributeType)
virtual void	SetInputArrayToProcess (int idx, vtkInformation *info)
virtual void	SetInputArrayToProcess (int idx, int port, int connection, const char *fieldAssociation, const char *attributeTypeorName)
vtkDataObject *	GetInputDataObject (int port, int connection)
virtual void	SetInputConnection (int port, vtkAlgorithmOutput *input)
virtual void	SetInputConnection (vtkAlgorithmOutput *input)
virtual void	AddInputConnection (int port, vtkAlgorithmOutput *input)
virtual void	AddInputConnection (vtkAlgorithmOutput *input)
virtual void	SetInputDataObject (int port, vtkDataObject *data)
virtual void	SetInputDataObject (vtkDataObject *data)
virtual void	AddInputDataObject (int port, vtkDataObject *data)
virtual void	AddInputDataObject (vtkDataObject *data)
vtkAlgorithmOutput *	GetOutputPort (int index)
vtkAlgorithmOutput *	GetOutputPort ()
vtkAlgorithm *	GetInputAlgorithm ()
vtkExecutive *	GetInputExecutive ()
vtkInformation *	GetInputInformation ()
virtual void	Update (int port)
virtual void	Update ()
virtual void	SetReleaseDataFlag (int)
virtual int	GetReleaseDataFlag ()
void	ReleaseDataFlagOn ()
void	ReleaseDataFlagOff ()
int	UpdateExtentIsEmpty (vtkInformation *pinfo, vtkDataObject *output)
int	UpdateExtentIsEmpty (vtkInformation *pinfo, int extentType)
void	SetUpdateExtent (int port, int piece, int numPieces, int ghostLevel)
void	SetUpdateExtent (int piece, int numPieces, int ghostLevel)
void	SetUpdateExtent (int extent[6])
int *	GetUpdateExtent ()
int *	GetUpdateExtent (int port)
void	GetUpdateExtent (int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
void	GetUpdateExtent (int port, int &x0, int &x1, int &y0, int &y1, int &z0, int &z1)
void	GetUpdateExtent (int extent[6])
void	GetUpdateExtent (int port, int extent[6])
int	GetUpdatePiece ()
int	GetUpdatePiece (int port)
int	GetUpdateNumberOfPieces ()
int	GetUpdateNumberOfPieces (int port)
int	GetUpdateGhostLevel ()
int	GetUpdateGhostLevel (int port)
void	SetProgressObserver (vtkProgressObserver *)
virtual vtkProgressObserver *	GetProgressObserver ()
Public Member Functions inherited from vtkObject
vtkObject *	NewInstance () const
virtual void	DebugOn ()
virtual void	DebugOff ()
bool	GetDebug ()
void	SetDebug (bool debugFlag)
virtual void	Modified ()
unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
unsigned long	AddObserver (const char *event, vtkCommand *, float priority=0.0f)
vtkCommand *	GetCommand (unsigned long tag)
void	RemoveObserver (vtkCommand *)
void	RemoveObservers (unsigned long event, vtkCommand *)
void	RemoveObservers (const char *event, vtkCommand *)
int	HasObserver (unsigned long event, vtkCommand *)
int	HasObserver (const char *event, vtkCommand *)
void	RemoveObserver (unsigned long tag)
void	RemoveObservers (unsigned long event)
void	RemoveObservers (const char *event)
void	RemoveAllObservers ()
int	HasObserver (unsigned long event)
int	HasObserver (const char *event)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
int	InvokeEvent (unsigned long event, void *callData)
int	InvokeEvent (const char *event, void *callData)
int	InvokeEvent (unsigned long event)
int	InvokeEvent (const char *event)
Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
virtual void	Delete ()
virtual void	FastDelete ()
void	Print (ostream &os)
void	SetReferenceCount (int)
void	PrintRevisions (ostream &)
virtual void	PrintHeader (ostream &os, vtkIndent indent)
virtual void	PrintTrailer (ostream &os, vtkIndent indent)
int	GetReferenceCount ()

Static Public Member Functions
static vtkFlyingEdges2D *	New ()
static int	IsTypeOf (const char *type)
static vtkFlyingEdges2D *	SafeDownCast (vtkObjectBase *o)
Static Public Member Functions inherited from vtkPolyDataAlgorithm
static vtkPolyDataAlgorithm *	New ()
static int	IsTypeOf (const char *type)
static vtkPolyDataAlgorithm *	SafeDownCast (vtkObjectBase *o)
Static Public Member Functions inherited from vtkAlgorithm
static vtkAlgorithm *	New ()
static int	IsTypeOf (const char *type)
static vtkAlgorithm *	SafeDownCast (vtkObjectBase *o)
static vtkInformationIntegerKey *	INPUT_IS_OPTIONAL ()
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 ()
static vtkInformationIntegerKey *	CAN_HANDLE_PIECE_REQUEST ()
static void	SetDefaultExecutivePrototype (vtkExecutive *proto)
Static Public Member Functions inherited from vtkObject
static int	IsTypeOf (const char *type)
static vtkObject *	SafeDownCast (vtkObjectBase *o)
static vtkObject *	New ()
static void	BreakOnError ()
static void	SetGlobalWarningDisplay (int val)
static void	GlobalWarningDisplayOn ()
static void	GlobalWarningDisplayOff ()
static int	GetGlobalWarningDisplay ()
Static Public Member Functions inherited from vtkObjectBase
static int	IsTypeOf (const char *name)
static vtkObjectBase *	New ()

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkFlyingEdges2D ()
	~vtkFlyingEdges2D ()
virtual int	RequestData (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
virtual int	FillInputPortInformation (int port, vtkInformation *info)
Protected Member Functions inherited from vtkPolyDataAlgorithm
	vtkPolyDataAlgorithm ()
	~vtkPolyDataAlgorithm ()
virtual int	RequestInformation (vtkInformation *request, vtkInformationVector **inputVector, vtkInformationVector *outputVector)
virtual int	FillOutputPortInformation (int port, vtkInformation *info)
virtual int	RequestUpdateExtent (vtkInformation *, vtkInformationVector **, vtkInformationVector *)
Protected Member Functions inherited from vtkAlgorithm
	vtkAlgorithm ()
	~vtkAlgorithm ()
virtual void	SetNumberOfInputPorts (int n)
virtual void	SetNumberOfOutputPorts (int n)
int	InputPortIndexInRange (int index, const char *action)
int	OutputPortIndexInRange (int index, const char *action)
int	GetInputArrayAssociation (int idx, vtkInformationVector **inputVector)
virtual vtkExecutive *	CreateDefaultExecutive ()
virtual void	ReportReferences (vtkGarbageCollector *)
virtual void	SetNumberOfInputConnections (int port, int n)
int	GetInputArrayAssociation (int idx, int connection, vtkInformationVector **inputVector)
int	GetInputArrayAssociation (int idx, vtkDataObject *input)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
vtkDataArray *	GetInputArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input)
vtkDataArray *	GetInputArrayToProcess (int idx, vtkDataObject *input, int &association)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkInformationVector **inputVector, int &association)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, int connection, vtkInformationVector **inputVector, int &association)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input)
vtkAbstractArray *	GetInputAbstractArrayToProcess (int idx, vtkDataObject *input, int &association)
vtkInformation *	GetInputArrayFieldInformation (int idx, vtkInformationVector **inputVector)
virtual void	SetNthInputConnection (int port, int index, vtkAlgorithmOutput *input)
void	SetInputDataInternal (int port, vtkDataObject *input)
void	AddInputDataInternal (int port, vtkDataObject *input)
virtual void	SetErrorCode (unsigned long)
Protected Member Functions inherited from vtkObject
	vtkObject ()
virtual	~vtkObject ()
virtual void	RegisterInternal (vtkObjectBase *, int check)
virtual void	UnRegisterInternal (vtkObjectBase *, int check)
void	InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=NULL)
void	InternalReleaseFocus ()
Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()
virtual	~vtkObjectBase ()
virtual void	CollectRevisions (ostream &)
	vtkObjectBase (const vtkObjectBase &)
void	operator= (const vtkObjectBase &)

Protected Attributes
vtkContourValues *	ContourValues
int	ComputeScalars
int	ArrayComponent
Protected Attributes inherited from vtkAlgorithm
vtkInformation *	Information
double	Progress
char *	ProgressText
vtkProgressObserver *	ProgressObserver
unsigned long	ErrorCode
Protected Attributes inherited from vtkObject
bool	Debug
vtkTimeStamp	MTime
vtkSubjectHelper *	SubjectHelper
Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount
vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Public Attributes inherited from vtkAlgorithm
int	AbortExecute
Static Protected Member Functions inherited from vtkAlgorithm
static vtkInformationIntegerKey *	PORT_REQUIREMENTS_FILLED ()
Static Protected Attributes inherited from vtkAlgorithm
static vtkExecutive *	DefaultExecutivePrototype

Detailed Description

generate isoline(s) from a structured points set

vtkFlyingEdges2D is a reference implementation of the 2D version of the flying edges algorithm. It is designed to be highly scalable (i.e., parallelizable) for large data. It implements certain performance optimizations including computational trimming to rapidly eliminate processing of data regions, packed bit representation of case table values, single edge intersection, elimination of point merging, and elimination of any reallocs (due to dynamic data insertion). Note that computational trimming is a method to reduce total computational cost in which partial computational results can be used to eliminate future computations.

This is a four-pass algorithm. The first pass processes all x-edges and builds x-edge case values (which, when the two x-edges defining a pixel are combined, are equivalent to vertex-based case table except edge-based approaches are separable to parallel computing). Next x-pixel rows are processed to gather information from y-edges (basically to count the number of edge intersections and lines generated). In the third pass a prefix sum is used to count and allocate memory for the output primitives. Finally in the fourth pass output primitives are generated into pre-allocated arrays. This implementation uses pixel cell axes (a x-y dyad located at the pixel origin) to ensure that each edge is intersected at most one time.

See the paper "Flying Edges: A High-Performance Scalable Isocontouring Algorithm" by Schroeder, Maynard, Geveci. Proc. of LDAV 2015. Chicago, IL.

Warning

This filter is specialized to 2D images. This implementation can produce degenerate line segments (i.e., zero-length line segments).

This class has been threaded with vtkSMPTools. Using TBB or other non-sequential type (set in the CMake variable VTK_SMP_IMPLEMENTATION_TYPE) may improve performance significantly.

See also

vtkContourFilter vtkFlyingEdges3D vtkSynchronizedTemplates2D vtkMarchingSquares

Tests:

vtkFlyingEdges2D (Tests)

Definition at line 70 of file vtkFlyingEdges2D.h.

Member Typedef Documentation

typedef vtkPolyDataAlgorithm vtkFlyingEdges2D::Superclass

Definition at line 74 of file vtkFlyingEdges2D.h.

Constructor & Destructor Documentation

vtkFlyingEdges2D::vtkFlyingEdges2D ( )

protected

vtkFlyingEdges2D::~vtkFlyingEdges2D ( )

protected

Member Function Documentation

static vtkFlyingEdges2D* vtkFlyingEdges2D::New ( )

static

static int vtkFlyingEdges2D::IsTypeOf ( const char *  type )

static

virtual int vtkFlyingEdges2D::IsA ( const char *  name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkPolyDataAlgorithm.

static vtkFlyingEdges2D* vtkFlyingEdges2D::SafeDownCast ( vtkObjectBase *  o )

static

virtual vtkObjectBase* vtkFlyingEdges2D::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkPolyDataAlgorithm.

vtkFlyingEdges2D* vtkFlyingEdges2D::NewInstance

(

)

const

void vtkFlyingEdges2D::PrintSelf ( ostream &  os, vtkIndent  indent  )

virtual

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkPolyDataAlgorithm.

unsigned long int vtkFlyingEdges2D::GetMTime ( )

virtual

Because we delegate to vtkContourValues.

Reimplemented from vtkObject.

void vtkFlyingEdges2D::SetValue ( int  i, double  value  )

inline

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

Definition at line 83 of file vtkFlyingEdges2D.h.

double vtkFlyingEdges2D::GetValue ( int  i )

inline

Get the ith contour value.

Definition at line 89 of file vtkFlyingEdges2D.h.

double* vtkFlyingEdges2D::GetValues ( )

inline

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

Definition at line 96 of file vtkFlyingEdges2D.h.

void vtkFlyingEdges2D::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 104 of file vtkFlyingEdges2D.h.

void vtkFlyingEdges2D::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 112 of file vtkFlyingEdges2D.h.

int vtkFlyingEdges2D::GetNumberOfContours ( )

inline

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

Definition at line 118 of file vtkFlyingEdges2D.h.

void vtkFlyingEdges2D::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 125 of file vtkFlyingEdges2D.h.

void vtkFlyingEdges2D::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 132 of file vtkFlyingEdges2D.h.

virtual void vtkFlyingEdges2D::SetComputeScalars ( int  )

virtual

Option to set the point scalars of the output. The scalars will be the iso value of course. By default this flag is on.

virtual int vtkFlyingEdges2D::GetComputeScalars ( )

virtual

Option to set the point scalars of the output. The scalars will be the iso value of course. By default this flag is on.

virtual void vtkFlyingEdges2D::ComputeScalarsOn ( )

virtual

Option to set the point scalars of the output. The scalars will be the iso value of course. By default this flag is on.

virtual void vtkFlyingEdges2D::ComputeScalarsOff ( )

virtual

Option to set the point scalars of the output. The scalars will be the iso value of course. By default this flag is on.

virtual void vtkFlyingEdges2D::SetArrayComponent ( int  )

virtual

Set/get which component of the scalar array to contour on; defaults to 0.

virtual int vtkFlyingEdges2D::GetArrayComponent ( )

virtual

Set/get which component of the scalar array to contour on; defaults to 0.

virtual int vtkFlyingEdges2D::RequestData ( vtkInformation *  request, vtkInformationVector **  inputVector, vtkInformationVector *  outputVector  )

protectedvirtual

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

Reimplemented from vtkPolyDataAlgorithm.

virtual int vtkFlyingEdges2D::FillInputPortInformation ( int  port, vtkInformation *  info  )

protectedvirtual

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.

Member Data Documentation

vtkContourValues* vtkFlyingEdges2D::ContourValues

protected

Definition at line 158 of file vtkFlyingEdges2D.h.

int vtkFlyingEdges2D::ComputeScalars

protected

Definition at line 160 of file vtkFlyingEdges2D.h.

int vtkFlyingEdges2D::ArrayComponent

protected

Definition at line 161 of file vtkFlyingEdges2D.h.

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

• dox/Filters/Core/vtkFlyingEdges2D.h