organize data according to scalar values (used to accelerate contouring operations) More...

#include <vtkScalarTree.h>

Inheritance diagram for vtkScalarTree:

Collaboration diagram for vtkScalarTree:

Public Member Functions
virtual void	ShallowCopy (vtkScalarTree *stree)
	This method is used to copy data members when cloning an instance of the class.

virtual void	BuildTree ()=0
	Construct the scalar tree from the dataset provided.

virtual void	Initialize ()=0
	Initialize locator.

virtual void	InitTraversal (double scalarValue)=0
	Begin to traverse the cells based on a scalar value (serial traversal).

virtual vtkCell *	GetNextCell (vtkIdType &cellId, vtkIdList &ptIds, vtkDataArray cellScalars)=0
	Return the next cell that may contain scalar value specified to InitTraversal() (serial traversal).

double	GetScalarValue ()
	Return the current scalar value over which tree traversal is proceeding.

virtual vtkIdType	GetNumberOfCellBatches (double scalarValue)=0
	Get the number of cell batches available for processing as a function of the specified scalar value.

virtual const vtkIdType *	GetCellBatch (vtkIdType batchNum, vtkIdType &numCells)=0
	Return the array of cell ids in the specified batch.


virtual void	SetDataSet (vtkDataSet *)
	Build the tree from the points/cells and scalars defining this dataset.

virtual vtkDataSet *	GetDataSet ()
	Build the tree from the points/cells and scalars defining this dataset.


virtual void	SetScalars (vtkDataArray *)
	Build the tree from the points/cells and scalars defining the dataset and scalars provided.

virtual vtkDataArray *	GetScalars ()
	Build the tree from the points/cells and scalars defining the dataset and scalars provided.

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.

Protected Member Functions
	vtkScalarTree ()

	~vtkScalarTree () override

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
vtkDataSet *	DataSet

vtkDataArray *	Scalars

double	ScalarValue

vtkTimeStamp	BuildTime

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

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

vtkWeakPointerBase **	WeakPointers

typedef vtkObject	Superclass
	Standard type related macros and PrintSelf() method.

static vtkTypeBool	IsTypeOf (const char *type)
	Standard type related macros and PrintSelf() method.

static vtkScalarTree *	SafeDownCast (vtkObjectBase *o)
	Standard type related macros and PrintSelf() method.

virtual vtkTypeBool	IsA (const char *type)
	Standard type related macros and PrintSelf() method.

vtkScalarTree *	NewInstance () const
	Standard type related macros and PrintSelf() method.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard type related macros and PrintSelf() method.

virtual vtkObjectBase *	NewInstanceInternal () const
	Standard type related macros and PrintSelf() method.

Additional Inherited Members
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.

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

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Detailed Description

organize data according to scalar values (used to accelerate contouring operations)

vtkScalarTree is an abstract class that defines the API to concrete scalar tree subclasses. A scalar tree is a data structure that organizes data according to its scalar value. This allows rapid access to data for those algorithms that access the data based on scalar value. For example, isocontouring operates on cells based on the scalar (isocontour) value.

To use subclasses of this class, you must specify a dataset to operate on, and then specify a scalar value in the InitTraversal() method. Then calls to GetNextCell() return cells whose scalar data contains the scalar value specified. (This describes serial traversal.)

Methods supporting parallel traversal (such as threading) are also supported. Basically thread-safe batches of cells (which are a portion of the whole dataset) are available for processing using a parallel For() operation. First request the number of batches, and then for each batch, retrieve the array of cell ids in that batch. These batches contain cell ids that are likely to contain the isosurface.

See also: vtkSimpleScalarTree vtkSpanSpace

Definition at line 54 of file vtkScalarTree.h.

Member Typedef Documentation

◆ Superclass

typedef vtkObject vtkScalarTree::Superclass

Standard type related macros and PrintSelf() method.

Definition at line 61 of file vtkScalarTree.h.

Constructor & Destructor Documentation

◆ vtkScalarTree()

vtkScalarTree::vtkScalarTree ( )

protected

◆ ~vtkScalarTree()

vtkScalarTree::~vtkScalarTree ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

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

static

Standard type related macros and PrintSelf() method.

◆ IsA()

virtual vtkTypeBool vtkScalarTree::IsA ( const char * type )

virtual

Standard type related macros and PrintSelf() method.

Reimplemented from vtkObjectBase.

Reimplemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ SafeDownCast()

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

static

Standard type related macros and PrintSelf() method.

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkScalarTree::NewInstanceInternal ( ) const

protectedvirtual

Standard type related macros and PrintSelf() method.

Reimplemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ NewInstance()

vtkScalarTree * vtkScalarTree::NewInstance ( ) const

Standard type related macros and PrintSelf() method.

◆ PrintSelf()

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

overridevirtual

Standard type related macros and PrintSelf() method.

Reimplemented from vtkObject.

Reimplemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ ShallowCopy()

virtual void vtkScalarTree::ShallowCopy ( vtkScalarTree * stree )

virtual

This method is used to copy data members when cloning an instance of the class.

It does not copy heavy data.

Reimplemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ SetDataSet()

virtual void vtkScalarTree::SetDataSet ( vtkDataSet * )

virtual

Build the tree from the points/cells and scalars defining this dataset.

◆ GetDataSet()

virtual vtkDataSet * vtkScalarTree::GetDataSet ( )

virtual

Build the tree from the points/cells and scalars defining this dataset.

◆ SetScalars()

virtual void vtkScalarTree::SetScalars ( vtkDataArray * )

virtual

Build the tree from the points/cells and scalars defining the dataset and scalars provided.

Typically the scalars come from the vtkDataSet specified, but sometimes a separate vtkDataArray is provided to specify the scalars. If the scalar array is explicitly set, then it takes precedence over the scalars held in the vtkDataSet.

◆ GetScalars()

virtual vtkDataArray * vtkScalarTree::GetScalars ( )

virtual

Build the tree from the points/cells and scalars defining the dataset and scalars provided.

Typically the scalars come from the vtkDataSet specified, but sometimes a separate vtkDataArray is provided to specify the scalars. If the scalar array is explicitly set, then it takes precedence over the scalars held in the vtkDataSet.

◆ BuildTree()

virtual void vtkScalarTree::BuildTree ( )

pure virtual

Construct the scalar tree from the dataset provided.

Checks build times and modified time from input and reconstructs the tree if necessary.

Implemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ Initialize()

virtual void vtkScalarTree::Initialize ( )

pure virtual

Initialize locator.

Frees memory and resets object as appropriate.

Implemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ InitTraversal()

virtual void vtkScalarTree::InitTraversal ( double scalarValue )

pure virtual

Begin to traverse the cells based on a scalar value (serial traversal).

Returned cells will have scalar values that span the scalar value specified. Note that changing the scalarValue does not cause the scalar tree to be modified, and hence it does not rebuild.

Implemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ GetNextCell()

virtual vtkCell * vtkScalarTree::GetNextCell	(	vtkIdType &	cellId,
		vtkIdList *&	ptIds,
		vtkDataArray *	cellScalars
	)

pure virtual

Return the next cell that may contain scalar value specified to InitTraversal() (serial traversal).

The value nullptr is returned if the list is exhausted. Make sure that InitTraversal() has been invoked first or you'll get erratic behavior.

Implemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ GetScalarValue()

double vtkScalarTree::GetScalarValue ( )

inline

Return the current scalar value over which tree traversal is proceeding.

This is the scalar value provided in InitTraversal().

Definition at line 124 of file vtkScalarTree.h.

◆ GetNumberOfCellBatches()

virtual vtkIdType vtkScalarTree::GetNumberOfCellBatches ( double scalarValue )

pure virtual

Get the number of cell batches available for processing as a function of the specified scalar value.

Each batch contains a list of candidate cells that may contain the specified isocontour value.

Implemented in vtkSimpleScalarTree, and vtkSpanSpace.

◆ GetCellBatch()

virtual const vtkIdType * vtkScalarTree::GetCellBatch	(	vtkIdType	batchNum,
		vtkIdType &	numCells
	)

pure virtual

Return the array of cell ids in the specified batch.

The method also returns the number of cell ids in the array. Make sure to call GetNumberOfCellBatches() beforehand.

Implemented in vtkSimpleScalarTree, and vtkSpanSpace.

Member Data Documentation

◆ DataSet

vtkDataSet* vtkScalarTree::DataSet

protected

Definition at line 148 of file vtkScalarTree.h.

◆ Scalars

vtkDataArray* vtkScalarTree::Scalars

protected

Definition at line 149 of file vtkScalarTree.h.

◆ ScalarValue

double vtkScalarTree::ScalarValue

protected

Definition at line 150 of file vtkScalarTree.h.

◆ BuildTime

vtkTimeStamp vtkScalarTree::BuildTime

protected

Definition at line 152 of file vtkScalarTree.h.

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

Common/ExecutionModel/vtkScalarTree.h

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Superclass

Constructor & Destructor Documentation

◆ vtkScalarTree()

◆ ~vtkScalarTree()

Member Function Documentation

◆ IsTypeOf()

◆ IsA()

◆ SafeDownCast()

◆ NewInstanceInternal()

◆ NewInstance()

◆ PrintSelf()

◆ ShallowCopy()

◆ SetDataSet()

◆ GetDataSet()

◆ SetScalars()

◆ GetScalars()

◆ BuildTree()

◆ Initialize()

◆ InitTraversal()

◆ GetNextCell()

◆ GetScalarValue()

◆ GetNumberOfCellBatches()

◆ GetCellBatch()

Member Data Documentation

◆ DataSet

◆ Scalars

◆ ScalarValue

◆ BuildTime