VTK  9.1.0
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
vtkRandomPool Class Reference

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

#include <vtkRandomPool.h>

Inheritance diagram for vtkRandomPool:
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Collaboration diagram for vtkRandomPool:
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Public Member Functions

vtkIdType GetTotalSize ()
 This convenience method returns the total size of the memory pool, i.e., Size*NumberOfComponents.
 
virtual void SetSequence (vtkRandomSequence *seq)
 Specify the random sequence generator used to produce the random pool.
 
virtual vtkRandomSequenceGetSequence ()
 Specify the random sequence generator used to produce the random pool.
 
virtual void SetSize (vtkIdType)
 Methods to set and get the size of the pool.
 
virtual vtkIdType GetSize ()
 Methods to set and get the size of the pool.
 
virtual void SetNumberOfComponents (vtkIdType)
 Methods to set and get the number of components in the pool.
 
virtual vtkIdType GetNumberOfComponents ()
 Methods to set and get the number of components in the pool.
 
const double * GeneratePool ()
 These methods provide access to the raw random pool as a double array.
 
const double * GetPool ()
 These methods provide access to the raw random pool as a double array.
 
double GetValue (vtkIdType i)
 These methods provide access to the raw random pool as a double array.
 
double GetValue (vtkIdType i, int compNum)
 These methods provide access to the raw random pool as a double array.
 
void PopulateDataArray (vtkDataArray *da, double minRange, double maxRange)
 Methods to populate data arrays of various types with values within a specified (min,max) range.
 
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.
 
virtual void SetChunkSize (vtkIdType)
 Specify the work chunk size at which point multithreading kicks in.
 
virtual vtkIdType GetChunkSize ()
 Specify the work chunk size at which point multithreading kicks in.
 
- 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.
 
vtkCommandGetCommand (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

 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.
 
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

vtkTimeStamp GenerateTime
 
vtkRandomSequenceSequence
 
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
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 
typedef vtkObject Superclass
 Standard methods for instantiation, type information, and printing.
 
static vtkRandomPoolNew ()
 Standard methods for instantiation, type information, and printing.
 
static vtkTypeBool IsTypeOf (const char *type)
 Standard methods for instantiation, type information, and printing.
 
static vtkRandomPoolSafeDownCast (vtkObjectBase *o)
 Standard methods for instantiation, type information, and printing.
 
virtual vtkTypeBool IsA (const char *type)
 Standard methods for instantiation, type information, and printing.
 
vtkRandomPoolNewInstance () const
 Standard methods for instantiation, type information, and printing.
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Standard methods for instantiation, type information, and printing.
 
virtual vtkObjectBaseNewInstanceInternal () const
 Standard methods for instantiation, type information, and printing.
 

Additional Inherited Members

- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 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 vtkObjectBaseNew ()
 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

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

◆ Superclass

Standard methods for instantiation, type information, and printing.

Definition at line 56 of file vtkRandomPool.h.

Constructor & Destructor Documentation

◆ vtkRandomPool()

vtkRandomPool::vtkRandomPool ( )
protected

◆ ~vtkRandomPool()

vtkRandomPool::~vtkRandomPool ( )
overrideprotected

Member Function Documentation

◆ New()

static vtkRandomPool * vtkRandomPool::New ( )
static

Standard methods for instantiation, type information, and printing.

◆ IsTypeOf()

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

Standard methods for instantiation, type information, and printing.

◆ IsA()

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

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkObjectBase.

◆ SafeDownCast()

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

Standard methods for instantiation, type information, and printing.

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkRandomPool::NewInstanceInternal ( ) const
protectedvirtual

Standard methods for instantiation, type information, and printing.

◆ NewInstance()

vtkRandomPool * vtkRandomPool::NewInstance ( ) const

Standard methods for instantiation, type information, and printing.

◆ PrintSelf()

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

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkObject.

◆ SetSequence()

virtual void vtkRandomPool::SetSequence ( vtkRandomSequence seq)
virtual

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

By default vtkMersenneTwister is used.

◆ GetSequence()

virtual vtkRandomSequence * vtkRandomPool::GetSequence ( )
virtual

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

By default vtkMersenneTwister is used.

◆ SetSize()

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).

◆ GetSize()

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).

◆ SetNumberOfComponents()

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.

◆ GetNumberOfComponents()

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.

◆ GetTotalSize()

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.

◆ GeneratePool()

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;

◆ GetPool()

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.

◆ GetValue() [1/2]

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.

◆ GetValue() [2/2]

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.

◆ PopulateDataArray() [1/2]

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).

◆ PopulateDataArray() [2/2]

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).

◆ SetChunkSize()

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.

◆ GetChunkSize()

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

◆ GenerateTime

vtkTimeStamp vtkRandomPool::GenerateTime
protected

Definition at line 149 of file vtkRandomPool.h.

◆ Sequence

vtkRandomSequence* vtkRandomPool::Sequence
protected

Definition at line 152 of file vtkRandomPool.h.

◆ Size

vtkIdType vtkRandomPool::Size
protected

Definition at line 153 of file vtkRandomPool.h.

◆ NumberOfComponents

int vtkRandomPool::NumberOfComponents
protected

Definition at line 154 of file vtkRandomPool.h.

◆ ChunkSize

vtkIdType vtkRandomPool::ChunkSize
protected

Definition at line 155 of file vtkRandomPool.h.

◆ TotalSize

vtkIdType vtkRandomPool::TotalSize
protected

Definition at line 158 of file vtkRandomPool.h.

◆ Pool

double* vtkRandomPool::Pool
protected

Definition at line 159 of file vtkRandomPool.h.


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