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  1. #1
    Lesser Knight
    Join Date
    Sep 2006

    Default Random Number Stream Generator

    OK, I've finished a class for a random number stream generator

    Features are:
    - You may instantiate multiple number streams
    - Repeatability, based on 32bit int number seeds
    - the PRNG is a Mersenne Twist algorithm, yielding a good distribution
    - Various random functions:
    -- rand() returns a 32bit int between 0 and 0xffffffff
    -- normalized() returns a float between 0.0 and 1.0
    -- even() returns bool (either true or false)
    -- deviated returns, well, potentially ANY number, with the output being distributed in a bell curve based on a median and standard deviation that you supply the function.

    If desired, I will implement state saving / loading features, though I don't know if this is necessary.

    I don't foresee speed being an issue; on my machine (an Athlon XP 1700+) I can easily generate a few million deviated random numbers (they take far longer than the other varieties) in a second or two.

    If people are OK with this, I'd like to incorporate it into ClanLib, as I believe such a system is rather useful. I'll have a patch ready for approval in a day or two.


    PS In the archive, you will find 3 files: a header file, an implementation file and a test file. The test takes some user input, and validates the PRNG distributing results correctly.
    Attached Files Attached Files

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