convenience class to quickly generate a pool of random numbers More...

#include <vtkRandomPool.h>

Inheritance diagram for vtkRandomPool:

Collaboration diagram for vtkRandomPool:

Public Member Functions
vtkIdType	GetTotalSize ()
	This convenience method returns the total size of the memory pool, i.e., Size*NumberOfComponents. More...


virtual void	SetSequence (vtkRandomSequence *seq)
	Specify the random sequence generator used to produce the random pool. More...

virtual vtkRandomSequence *	GetSequence ()
	Specify the random sequence generator used to produce the random pool. More...


virtual void	SetSize (vtkIdType)
	Methods to set and get the size of the pool. More...

virtual vtkIdType	GetSize ()
	Methods to set and get the size of the pool. More...


virtual void	SetNumberOfComponents (vtkIdType)
	Methods to set and get the number of components in the pool. More...

virtual vtkIdType	GetNumberOfComponents ()
	Methods to set and get the number of components in the pool. More...


const double *	GeneratePool ()
	These methods provide access to the raw random pool as a double array. More...

const double *	GetPool ()
	These methods provide access to the raw random pool as a double array. More...

double	GetValue (vtkIdType i)
	These methods provide access to the raw random pool as a double array. More...

double	GetValue (vtkIdType i, int compNum)
	These methods provide access to the raw random pool as a double array. More...


void	PopulateDataArray (vtkDataArray *da, double minRange, double maxRange)
	Methods to populate data arrays of various types with values within a specified (min,max) range. More...

void	PopulateDataArray (vtkDataArray *da, int compNumber, double minRange, double maxRange)
	Methods to populate data arrays of various types with values within a specified (min,max) range. More...


virtual void	SetChunkSize (vtkIdType)
	Specify the work chunk size at which point multithreading kicks in. More...

virtual vtkIdType	GetChunkSize ()
	Specify the work chunk size at which point multithreading kicks in. More...

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on. More...

virtual void	DebugOff ()
	Turn debugging output off. More...

bool	GetDebug ()
	Get the value of the debug flag. More...

void	SetDebug (bool debugFlag)
	Set the value of the debug flag. More...

virtual void	Modified ()
	Update the modification time for this object. More...

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time. More...

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. More...

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

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. More...

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. More...

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. More...

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...

int	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not. More...

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string. More...

virtual void	Delete ()
	Delete a VTK object. More...

virtual void	FastDelete ()
	Delete a reference to this object. More...

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream. More...

virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object). More...

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object). More...

int	GetReferenceCount ()
	Return the current reference count of this object. More...

void	SetReferenceCount (int)
	Sets the reference count. More...

void	PrintRevisions (ostream &)
	Legacy. More...

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

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

Protected Member Functions
	vtkRandomPool ()

	~vtkRandomPool () 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. More...

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events. More...

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
vtkTimeStamp	GenerateTime

vtkRandomSequence *	Sequence

vtkIdType	Size

int	NumberOfComponents

vtkIdType	ChunkSize

vtkIdType	TotalSize

double *	Pool

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
vtkAtomicInt32	ReferenceCount

vtkWeakPointerBase **	WeakPointers

typedef vtkObject	Superclass
	Standard methods for instantiation, type information, and printing. More...

static vtkRandomPool *	New ()
	Standard methods for instantiation, type information, and printing. More...

static vtkTypeBool	IsTypeOf (const char *type)
	Standard methods for instantiation, type information, and printing. More...

static vtkRandomPool *	SafeDownCast (vtkObjectBase *o)
	Standard methods for instantiation, type information, and printing. More...

virtual vtkTypeBool	IsA (const char *type)
	Standard methods for instantiation, type information, and printing. More...

vtkRandomPool *	NewInstance () const
	Standard methods for instantiation, type information, and printing. More...

void	PrintSelf (ostream &os, vtkIndent indent) override
	Standard methods for instantiation, type information, and printing. More...

virtual vtkObjectBase *	NewInstanceInternal () const
	Standard methods for instantiation, type information, and printing. More...

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. More...

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes. More...

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

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. More...

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

Detailed Description

convenience class to quickly generate a pool of random numbers

vtkRandomPool generates random numbers, and can do so using multithreading. It supports parallel applications where generating random numbers on the fly is difficult (i.e., non-deterministic). Also, it can be used to populate vtkDataArrays in an efficient manner. By default it uses an instance of vtkMersenneTwister to generate random sequences, but any subclass of vtkRandomSequence may be used. It also supports simple methods to generate, access, and pass random memory pools between objects.

In threaded applications, these class may be conveniently used to pre-generate a sequence of random numbers, followed by the use of deterministic accessor methods to produce random sequences without problems etc. due to unpredictable work load and order of thread execution.

Warning: The class uses vtkMultiThreader if the size of the pool is larger than the specified chunk size. Also, vtkSMPTools may be used to scale the components in the method PopulateDataArray().

Definition at line 48 of file vtkRandomPool.h.

Member Typedef Documentation

typedef vtkObject vtkRandomPool::Superclass

Standard methods for instantiation, type information, and printing.

Definition at line 56 of file vtkRandomPool.h.

Constructor & Destructor Documentation

vtkRandomPool::vtkRandomPool ( )

protected

vtkRandomPool::~vtkRandomPool ( )

overrideprotected

Member Function Documentation

static vtkRandomPool* vtkRandomPool::New ( )

static

Standard methods for instantiation, type information, and printing.

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

static

Standard methods for instantiation, type information, and printing.

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

virtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkObjectBase.

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

static

Standard methods for instantiation, type information, and printing.

virtual vtkObjectBase* vtkRandomPool::NewInstanceInternal ( ) const

protectedvirtual

Standard methods for instantiation, type information, and printing.

vtkRandomPool* vtkRandomPool::NewInstance ( ) const

Standard methods for instantiation, type information, and printing.

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

overridevirtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkObject.

virtual void vtkRandomPool::SetSequence ( vtkRandomSequence * seq )

virtual

Specify the random sequence generator used to produce the random pool.

By default vtkMersenneTwister is used.

virtual vtkRandomSequence* vtkRandomPool::GetSequence ( )

virtual

Specify the random sequence generator used to produce the random pool.

By default vtkMersenneTwister is used.

virtual void vtkRandomPool::SetSize ( vtkIdType )

virtual

Methods to set and get the size of the pool.

The size must be specified before invoking GeneratePool(). Note the number of components will affect the total size (allocated memory is Size*NumberOfComponents).

virtual vtkIdType vtkRandomPool::GetSize ( )

virtual

Methods to set and get the size of the pool.

The size must be specified before invoking GeneratePool(). Note the number of components will affect the total size (allocated memory is Size*NumberOfComponents).

virtual void vtkRandomPool::SetNumberOfComponents ( vtkIdType )

virtual

Methods to set and get the number of components in the pool.

This is a convenience capability and can be used to interface with vtkDataArrays. By default the number of components is =1.

virtual vtkIdType vtkRandomPool::GetNumberOfComponents ( )

virtual

Methods to set and get the number of components in the pool.

This is a convenience capability and can be used to interface with vtkDataArrays. By default the number of components is =1.

vtkIdType vtkRandomPool::GetTotalSize ( )

inline

This convenience method returns the total size of the memory pool, i.e., Size*NumberOfComponents.

Definition at line 93 of file vtkRandomPool.h.

const double* vtkRandomPool::GeneratePool ( )

These methods provide access to the raw random pool as a double array.

The size of the array is Size*NumberOfComponents. Each x value ranges between (0<=x<=1). The class will generate the pool as necessary (a modified time for generation is maintained). Also a method is available for getting the value at the ith pool position and compNum component. Finally, note that the GetValue() method uses modulo reduction to ensure that the request remains inside of the pool. Two forms are provided, the first assumes NumberOfComponents=1; the second allows access to a particular component. The GetPool() and GetValue() methods should only be called after GeneratePool() has been invoked;

const double* vtkRandomPool::GetPool ( )

inline

These methods provide access to the raw random pool as a double array.

The size of the array is Size*NumberOfComponents. Each x value ranges between (0<=x<=1). The class will generate the pool as necessary (a modified time for generation is maintained). Also a method is available for getting the value at the ith pool position and compNum component. Finally, note that the GetValue() method uses modulo reduction to ensure that the request remains inside of the pool. Two forms are provided, the first assumes NumberOfComponents=1; the second allows access to a particular component. The GetPool() and GetValue() methods should only be called after GeneratePool() has been invoked;

Definition at line 109 of file vtkRandomPool.h.

double vtkRandomPool::GetValue ( vtkIdType i )

inline

These methods provide access to the raw random pool as a double array.

The size of the array is Size*NumberOfComponents. Each x value ranges between (0<=x<=1). The class will generate the pool as necessary (a modified time for generation is maintained). Also a method is available for getting the value at the ith pool position and compNum component. Finally, note that the GetValue() method uses modulo reduction to ensure that the request remains inside of the pool. Two forms are provided, the first assumes NumberOfComponents=1; the second allows access to a particular component. The GetPool() and GetValue() methods should only be called after GeneratePool() has been invoked;

Definition at line 110 of file vtkRandomPool.h.

double vtkRandomPool::GetValue	(	vtkIdType	i,
		int	compNum
	)

inline

These methods provide access to the raw random pool as a double array.

The size of the array is Size*NumberOfComponents. Each x value ranges between (0<=x<=1). The class will generate the pool as necessary (a modified time for generation is maintained). Also a method is available for getting the value at the ith pool position and compNum component. Finally, note that the GetValue() method uses modulo reduction to ensure that the request remains inside of the pool. Two forms are provided, the first assumes NumberOfComponents=1; the second allows access to a particular component. The GetPool() and GetValue() methods should only be called after GeneratePool() has been invoked;

Definition at line 111 of file vtkRandomPool.h.

void vtkRandomPool::PopulateDataArray	(	vtkDataArray *	da,
		double	minRange,
		double	maxRange
	)

Methods to populate data arrays of various types with values within a specified (min,max) range.

Note that compNumber is used to specify the range for a particular component; otherwise all generated components are within the (min,max) range specified. (Thus it is possible to make multiple calls to generate random numbers for each component with different ranges.) Internally the type of the data array passed in is used to cast to the appropriate type. Also the size and number of components of the vtkDataArray controls the total number of random numbers generated; so the input data array should be pre-allocated with (SetNumberOfComponents, SetNumberOfTuples).

void vtkRandomPool::PopulateDataArray	(	vtkDataArray *	da,
		int	compNumber,
		double	minRange,
		double	maxRange
	)

Methods to populate data arrays of various types with values within a specified (min,max) range.

Note that compNumber is used to specify the range for a particular component; otherwise all generated components are within the (min,max) range specified. (Thus it is possible to make multiple calls to generate random numbers for each component with different ranges.) Internally the type of the data array passed in is used to cast to the appropriate type. Also the size and number of components of the vtkDataArray controls the total number of random numbers generated; so the input data array should be pre-allocated with (SetNumberOfComponents, SetNumberOfTuples).

virtual void vtkRandomPool::SetChunkSize ( vtkIdType )

virtual

Specify the work chunk size at which point multithreading kicks in.

For small memory pools < ChunkSize, no threading is used. Larger pools are computed using vtkMultiThreader.

virtual vtkIdType vtkRandomPool::GetChunkSize ( )

virtual

Specify the work chunk size at which point multithreading kicks in.

For small memory pools < ChunkSize, no threading is used. Larger pools are computed using vtkMultiThreader.

Member Data Documentation

vtkTimeStamp vtkRandomPool::GenerateTime

protected

Definition at line 148 of file vtkRandomPool.h.

vtkRandomSequence* vtkRandomPool::Sequence

protected

Definition at line 151 of file vtkRandomPool.h.

vtkIdType vtkRandomPool::Size

protected

Definition at line 152 of file vtkRandomPool.h.

int vtkRandomPool::NumberOfComponents

protected

Definition at line 153 of file vtkRandomPool.h.

vtkIdType vtkRandomPool::ChunkSize

protected

Definition at line 154 of file vtkRandomPool.h.

vtkIdType vtkRandomPool::TotalSize

protected

Definition at line 157 of file vtkRandomPool.h.

double* vtkRandomPool::Pool

protected

Definition at line 158 of file vtkRandomPool.h.

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

/home/demarle/Source/VTK/release/8.2/build/Utilities/Doxygen/dox/Common/Core/vtkRandomPool.h

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation