Produce filled convex hulls around a set of points. More...

#include <vtkConvexHull2D.h>

Inheritance diagram for vtkConvexHull2D:

Collaboration diagram for vtkConvexHull2D:

Public Types
enum	HullShapes { BoundingRectangle = 0, ConvexHull }
typedef vtkPolyDataAlgorithm	Superclass
Public Types inherited from vtkPolyDataAlgorithm
Public Types inherited from vtkAlgorithm
enum	DesiredOutputPrecision { SINGLE_PRECISION, DOUBLE_PRECISION, DEFAULT_PRECISION }
Public Types inherited from vtkObject

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

virtual double	GetScaleFactor ()
virtual void	SetScaleFactor (double)

virtual bool	GetOutline ()
virtual void	SetOutline (bool)
virtual void	OutlineOn ()
virtual void	OutlineOff ()

virtual int	GetHullShape ()
virtual void	SetHullShape (int)

virtual void	SetMinHullSizeInWorld (double)
virtual double	GetMinHullSizeInWorld ()

virtual void	SetMinHullSizeInDisplay (int)
virtual int	GetMinHullSizeInDisplay ()

void	SetRenderer (vtkRenderer *renderer)
vtkRenderer *	GetRenderer ()
Public Member Functions inherited from vtkPolyDataAlgorithm
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
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	PropagateUpdateExtent ()
virtual void	UpdateWholeExtent ()
void	ConvertTotalInputToPortConnection (int ind, int &port, int &conn)
virtual double	ComputePriority ()
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)
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)
Public Member Functions inherited from vtkObject
virtual void	DebugOn ()
virtual void	DebugOff ()
unsigned char	GetDebug ()
void	SetDebug (unsigned char 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 vtkConvexHull2D *	New ()
static int	IsTypeOf (const char *type)
static vtkConvexHull2D *	SafeDownCast (vtkObject *o)

static void	CalculateBoundingRectangle (vtkPoints inPoints, vtkPoints outPoints, double minimumHullSize=1.0)
static void	CalculateConvexHull (vtkPoints inPoints, vtkPoints outPoints, double minimumHullSize=1.0)

Protected Member Functions
	vtkConvexHull2D ()
	~vtkConvexHull2D ()

int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )
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	FillInputPortInformation (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 &)

Detailed Description

Produce filled convex hulls around a set of points.

Produces a vtkPolyData comprised of a filled polygon of the convex hull of the input points. You may alternatively choose to output a bounding rectangle. Static methods are provided that calculate a (counter-clockwise) hull based on a set of input points.

To help maintain the property of guaranteed visibility hulls may be artificially scaled by setting MinHullSizeInWorld. This is particularly helpful in the case that there are only one or two points as it avoids producing a degenerate polygon. This setting is also available as an argument to the static methods.

Setting a vtkRenderer on the filter enables the possibility to set MinHullSizeInDisplay to the desired number of display pixels to cover in each of the x- and y-dimensions.

Setting OutlineOn() additionally produces an outline of the hull on output port 1.

Attention:: This filter operates in the x,y-plane and as such works best with an interactor style that does not permit camera rotation such as vtkInteractorStyleRubberBand2D.

Thanks:: Thanks to Colin Myers, University of Leeds for providing this implementation.

Tests:: vtkConvexHull2D (Tests)

Definition at line 65 of file vtkConvexHull2D.h.

Member Typedef Documentation

typedef vtkPolyDataAlgorithm vtkConvexHull2D::Superclass

Reimplemented from vtkPolyDataAlgorithm.

Definition at line 69 of file vtkConvexHull2D.h.

Member Enumeration Documentation

enum vtkConvexHull2D::HullShapes

Enumerator:

BoundingRectangle
ConvexHull

Definition at line 85 of file vtkConvexHull2D.h.

Constructor & Destructor Documentation

vtkConvexHull2D::vtkConvexHull2D ( )

protected

vtkConvexHull2D::~vtkConvexHull2D ( )

protected

Member Function Documentation

static vtkConvexHull2D* vtkConvexHull2D::New ( )

static

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkPolyDataAlgorithm.

virtual const char* vtkConvexHull2D::GetClassName ( )

virtual

Reimplemented from vtkPolyDataAlgorithm.

static int vtkConvexHull2D::IsTypeOf ( const char * name )

static

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

Reimplemented from vtkPolyDataAlgorithm.

virtual int vtkConvexHull2D::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 vtkConvexHull2D* vtkConvexHull2D::SafeDownCast ( vtkObject * o )

static

Reimplemented from vtkPolyDataAlgorithm.

void vtkConvexHull2D::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.

virtual double vtkConvexHull2D::GetScaleFactor ( )

virtual

Scale the hull by the amount specified. Defaults to 1.0.

virtual void vtkConvexHull2D::SetScaleFactor ( double )

virtual

Scale the hull by the amount specified. Defaults to 1.0.

virtual bool vtkConvexHull2D::GetOutline ( )

virtual

Produce an outline (polyline) of the hull on output port 1.

virtual void vtkConvexHull2D::SetOutline ( bool )

virtual

Produce an outline (polyline) of the hull on output port 1.

virtual void vtkConvexHull2D::OutlineOn ( )

virtual

Produce an outline (polyline) of the hull on output port 1.

virtual void vtkConvexHull2D::OutlineOff ( )

virtual

Produce an outline (polyline) of the hull on output port 1.

virtual int vtkConvexHull2D::GetHullShape ( )

virtual

Set the shape of the hull to BoundingRectangle or ConvexHull.

virtual void vtkConvexHull2D::SetHullShape ( int )

virtual

Set the shape of the hull to BoundingRectangle or ConvexHull.

virtual void vtkConvexHull2D::SetMinHullSizeInWorld ( double )

virtual

Set the minimum x,y-dimensions of each hull in world coordinates. Defaults to 1.0. Set to 0.0 to disable.

virtual double vtkConvexHull2D::GetMinHullSizeInWorld ( )

virtual

Set the minimum x,y-dimensions of each hull in world coordinates. Defaults to 1.0. Set to 0.0 to disable.

virtual void vtkConvexHull2D::SetMinHullSizeInDisplay ( int )

virtual

Set the minimum x,y-dimensions of each hull in pixels. You must also set a vtkRenderer. Defaults to 1. Set to 0 to disable.

virtual int vtkConvexHull2D::GetMinHullSizeInDisplay ( )

virtual

Set the minimum x,y-dimensions of each hull in pixels. You must also set a vtkRenderer. Defaults to 1. Set to 0 to disable.

void vtkConvexHull2D::SetRenderer ( vtkRenderer * renderer )

Renderer needed for MinHullSizeInDisplay calculation. Not reference counted.

vtkRenderer* vtkConvexHull2D::GetRenderer ( )

Renderer needed for MinHullSizeInDisplay calculation. Not reference counted.

virtual unsigned long vtkConvexHull2D::GetMTime ( )

virtual

The modified time of this filter.

Reimplemented from vtkObject.

static void vtkConvexHull2D::CalculateBoundingRectangle	(	vtkPoints *	inPoints,
		vtkPoints *	outPoints,
		double	minimumHullSize = `1.0`
	)

static

Convenience methods to calculate a convex hull from a set of vtkPointS.

static void vtkConvexHull2D::CalculateConvexHull	(	vtkPoints *	inPoints,
		vtkPoints *	outPoints,
		double	minimumHullSize = `1.0`
	)

static

Convenience methods to calculate a convex hull from a set of vtkPointS.

int vtkConvexHull2D::RequestData	(	vtkInformation *	,
		vtkInformationVector **	,
		vtkInformationVector *
	)

protectedvirtual

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

Reimplemented from vtkPolyDataAlgorithm.

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

dox/Infovis/Core/vtkConvexHull2D.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation