Park and Miller Sequence of pseudo random numbers. More...

#include <vtkMinimalStandardRandomSequence.h>

Inheritance diagram for vtkMinimalStandardRandomSequence:

Collaboration diagram for vtkMinimalStandardRandomSequence:

Public Member Functions
void	Initialize (vtkTypeUInt32 seed) override
	Satisfy general API of vtkRandomSequence superclass.

void	SetSeed (int value)
	Set the seed of the random sequence.

void	SetSeedOnly (int value)
	Set the seed of the random sequence.

int	GetSeed ()
	Get the seed of the random sequence.

double	GetValue () override
	Current value.

void	Next () override
	Move to the next number in the random sequence.

virtual double	GetRangeValue (double rangeMin, double rangeMax)
	Convenient method to return a value in a specific range from the range [0,1.

double	GetNextRangeValue (double rangeMin, double rangeMax)
	Get the next value in the sequence within a range.

Public Member Functions inherited from vtkRandomSequence
virtual void	Initialize (vtkTypeUInt32 seed)=0
	Initialize the sequence with a seed.

virtual double	GetValue ()=0
	Return the current value.

virtual void	Next ()=0
	Move to the next number in the random sequence.

double	GetNextValue ()
	Advance the sequence and return the new value.

vtkRandomSequence *	NewInstance () const
	Standard methods for type information and printing.

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

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
	vtkMinimalStandardRandomSequence ()

	~vtkMinimalStandardRandomSequence () override

Protected Member Functions inherited from vtkRandomSequence
	vtkRandomSequence ()

	~vtkRandomSequence () 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
int	Seed

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

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

vtkWeakPointerBase **	WeakPointers

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

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

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

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

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

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

Additional Inherited Members
Public Types inherited from vtkRandomSequence
typedef vtkObject	Superclass
	Standard methods for type information and printing.

Static Public Member Functions inherited from vtkRandomSequence
static vtkTypeBool	IsTypeOf (const char *type)
	Standard methods for type information and printing.

static vtkRandomSequence *	SafeDownCast (vtkObjectBase *o)
	Standard methods for type information and printing.

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

Park and Miller Sequence of pseudo random numbers.

vtkMinimalStandardRandomSequence is a sequence of statistically independent pseudo random numbers uniformly distributed between 0.0 and 1.0.

The sequence is generated by a prime modulus multiplicative linear congruential generator (PMMLCG) or "Lehmer generator" with multiplier 16807 and prime modulus 2^(31)-1. The authors calls it "minimal standard random number generator"

ref: "Random Number Generators: Good Ones are Hard to Find," by Stephen K. Park and Keith W. Miller in Communications of the ACM, 31, 10 (Oct. 1988) pp. 1192-1201. Code is at page 1195, "Integer version 2"

Correctness test is described in first column, page 1195: A seed of 1 at step 1 should give a seed of 1043618065 at step 10001.

Online Examples:

GreedyTerrainDecimation

ResampleAppendedPolyData

RandomSequence

Lorenz

Definition at line 150 of file vtkMinimalStandardRandomSequence.h.

Member Typedef Documentation

◆ Superclass

typedef vtkRandomSequence vtkMinimalStandardRandomSequence::Superclass

Standard methods for instantiation, type information, and printing.

Definition at line 158 of file vtkMinimalStandardRandomSequence.h.

Constructor & Destructor Documentation

◆ vtkMinimalStandardRandomSequence()

vtkMinimalStandardRandomSequence::vtkMinimalStandardRandomSequence ( )

protected

◆ ~vtkMinimalStandardRandomSequence()

vtkMinimalStandardRandomSequence::~vtkMinimalStandardRandomSequence ( )

overrideprotected

Member Function Documentation

◆ New()

static vtkMinimalStandardRandomSequence * vtkMinimalStandardRandomSequence::New ( )

static

Standard methods for instantiation, type information, and printing.

◆ IsTypeOf()

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

static

Standard methods for instantiation, type information, and printing.

◆ IsA()

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

virtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkRandomSequence.

◆ SafeDownCast()

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

static

Standard methods for instantiation, type information, and printing.

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkMinimalStandardRandomSequence::NewInstanceInternal ( ) const

protectedvirtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkRandomSequence.

◆ NewInstance()

vtkMinimalStandardRandomSequence * vtkMinimalStandardRandomSequence::NewInstance ( ) const

Standard methods for instantiation, type information, and printing.

◆ PrintSelf()

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

overridevirtual

Standard methods for instantiation, type information, and printing.

Reimplemented from vtkObjectBase.

◆ Initialize()

void vtkMinimalStandardRandomSequence::Initialize ( vtkTypeUInt32 seed )

inlineoverridevirtual

Satisfy general API of vtkRandomSequence superclass.

Initialize the sequence with a seed.

Implements vtkRandomSequence.

Definition at line 166 of file vtkMinimalStandardRandomSequence.h.

◆ SetSeed()

void vtkMinimalStandardRandomSequence::SetSeed ( int value )

Set the seed of the random sequence.

The following pre-condition is stated page 1197, second column: valid_seed: value>=1 && value<=2147483646 2147483646=(2^31)-2 This method does not have this criterium as a pre-condition (ie it will not fail if an incorrect seed value is passed) but the value is silently changed to fit in the valid range [1,2147483646]. 2147483646 is added to a null or negative value. 2147483647 is changed to be 1 (ie 2147483646 is subtracted). Implementation note: it also performs 3 calls to Next() to avoid the bad property that the first random number is proportional to the seed value.

◆ SetSeedOnly()

void vtkMinimalStandardRandomSequence::SetSeedOnly ( int value )

Set the seed of the random sequence.

There is no extra internal adjustment. Only useful for writing correctness test. The following pre-condition is stated page 1197, second column 2147483646=(2^31)-2 This method does not have this criterium as a pre-condition (ie it will not fail if an incorrect seed value is passed) but the value is silently changed to fit in the valid range [1,2147483646]. 2147483646 is added to a null or negative value. 2147483647 is changed to be 1 (ie 2147483646 is subtracted).

◆ GetSeed()

int vtkMinimalStandardRandomSequence::GetSeed ( )

Get the seed of the random sequence.

Only useful for writing correctness test.

◆ GetValue()

double vtkMinimalStandardRandomSequence::GetValue ( )

overridevirtual

Current value.

Postcondition: unit_range: result>=0.0 && result<=1.0

Implements vtkRandomSequence.

◆ Next()

void vtkMinimalStandardRandomSequence::Next ( )

overridevirtual

Move to the next number in the random sequence.

Implements vtkRandomSequence.

◆ GetRangeValue()

virtual double vtkMinimalStandardRandomSequence::GetRangeValue	(	double	rangeMin,
		double	rangeMax
	)

virtual

Convenient method to return a value in a specific range from the range [0,1.

There is an initial implementation that can be overridden by a subclass. There is no pre-condition on the range:

it can be in increasing order: rangeMin<rangeMax
it can be empty: rangeMin=rangeMax
it can be in decreasing order: rangeMin>rangeMax
Postcondition
result_in_range: (rangeMin<=rangeMax && result>=rangeMin && result<=rangeMax) || (rangeMax<=rangeMin && result>=rangeMax && result<=rangeMin)

◆ GetNextRangeValue()

double vtkMinimalStandardRandomSequence::GetNextRangeValue	(	double	rangeMin,
		double	rangeMax
	)

Get the next value in the sequence within a range.

See also: vtkMinimalStandardRandomSequence::GetRangeValue

Member Data Documentation

◆ Seed

int vtkMinimalStandardRandomSequence::Seed

protected

Definition at line 239 of file vtkMinimalStandardRandomSequence.h.

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

Common/Core/vtkMinimalStandardRandomSequence.h

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Superclass

Constructor & Destructor Documentation

◆ vtkMinimalStandardRandomSequence()

◆ ~vtkMinimalStandardRandomSequence()

Member Function Documentation

◆ New()

◆ IsTypeOf()

◆ IsA()

◆ SafeDownCast()

◆ NewInstanceInternal()

◆ NewInstance()

◆ PrintSelf()

◆ Initialize()

◆ SetSeed()

◆ SetSeedOnly()

◆ GetSeed()

◆ GetValue()

◆ Next()

◆ GetRangeValue()

◆ GetNextRangeValue()

Member Data Documentation

◆ Seed