tReproducibleRandomizer Class Reference

Reproducible random generator. More...

#include <tRandom.h>

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List of all members.

Public Member Functions
	tReproducibleRandomizer ()
	default constructor
	~tReproducibleRandomizer ()
	destructor
Static Public Member Functions
static tReproducibleRandomizer &	GetInstance ()
	returns the standard reproducible randomizer
Private Member Functions
virtual unsigned int	GetRawRand ()
	returns a raw random number
Private Attributes
int	z_
int	w_

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Detailed Description

Reproducible random generator.

Definition at line 60 of file tRandom.h.

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Constructor & Destructor Documentation

tReproducibleRandomizer::tReproducibleRandomizer

(

void

)

default constructor

Definition at line 185 of file tRandom.cpp.

References tRecorder::PlaybackStrict(), tRandomizer::randMax_, tRecorder::Record(), recordingSection, w_, and z_.

{
    // generate random seeds with standard random generator
    z_ = rand();
    w_ = rand();
    randMax_ = 0xffffffff;

    // archive seed
    tRecorder::PlaybackStrict( recordingSection, z_ );
    tRecorder::Record( recordingSection, z_ );

    tRecorder::PlaybackStrict( recordingSection, w_ );
    tRecorder::Record( recordingSection, w_ );

    /*
        // read RAND_MAX from recording or write it to recording
        if ( !tRecorder::PlaybackStrict( recordingSection, randMax_ ) )
            tRecorder::Record( recordingSection, randMax_ );
    */
}

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tReproducibleRandomizer::~tReproducibleRandomizer

(

void

)

destructor

Definition at line 215 of file tRandom.cpp.

{
}

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Member Function Documentation

tReproducibleRandomizer & tReproducibleRandomizer::GetInstance

(

void

)

[static]

returns the standard reproducible randomizer

Returns:

the default reproducible randomizer

Reimplemented from tRandomizer.

Definition at line 229 of file tRandom.cpp.

Referenced by gCycleChatBot::Activate(), gArena::GetRandomPos(), and nWaitForAck::nWaitForAck().

{
    static tReproducibleRandomizer randomizer;
    return randomizer;
}

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unsigned int tReproducibleRandomizer::GetRawRand

(

void

)

[private, virtual]

returns a raw random number

Returns:

raw random value between 0 and randMax_ todo use own, fixed random algorithm so the random values don't have to be stored

Reimplemented from tRandomizer.

Definition at line 245 of file tRandom.cpp.

References w_, and z_.

{
    // advance pseudo random numbers
    z_ = ( 36969 * ( z_ & 0xffff ) + ( z_ >> 16 ) ) & 0xffffffff;
    w_ = ( 18000 * ( w_ & 0xffff ) + ( w_ >> 16 ) ) & 0xffffffff;

    return ( (z_ << 16) + w_ ) & 0xffffffff;

    /*
        unsigned int r = 0;

        // read random value from recording
        if ( !tRecorder::PlaybackStrict( recordingSection, r ) )
        {
            // not found. generate random value
            r = rand();

            // store it
            tRecorder::Record( recordingSection, r );
        }

        return r;
        */
}

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Member Data Documentation

int tReproducibleRandomizer::z_ [private]

Definition at line 70 of file tRandom.h.

Referenced by GetRawRand(), and tReproducibleRandomizer().

int tReproducibleRandomizer::w_ [private]

Definition at line 70 of file tRandom.h.

Referenced by GetRawRand(), and tReproducibleRandomizer().

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

• src/tools/tRandom.h
• src/tools/tRandom.cpp

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