random-state

## About random-state
This is a collection of pseudo random number generators (PRNGs) and quasi-random number generators (QRNGs). While Common Lisp does provide a ``RANDOM`` function, it does not allow the user to pass an explicit seed, nor to portably exchange the random state between implementations. This can be a headache in cases like games, where a controlled seeding process is very useful.

## How To
For both curiosity and convenience, this library offers multiple algorithms to generate random numbers, as well as a bunch of generally useful methods to produce desired ranges.

:: common lisp
(loop with generator = (random-state:make-generator :mersenne-twister-32 123)
      repeat 10
      collect (random-state:random-int generator 0 10))
; => (8 10 9 5 3 10 9 2 9 2)
::

Several methods to compute random numbers in certain ranges are provided in advance: ``random-byte``, ``random-bytes``, ``random-sequence``, ``random-unit``, ``random-float``, and ``random-int``. Each of those can also be used with just the name of the generator you'd like to use as the first argument, in which case a global instance will be used.

For generators that are hash-based, such as ``squirrel``, additional noise functions are provided: ``random-1d``, ``random-2d``, and ``random-3d``, and some functions to manipulate the stepping of the generator: ``index``, and ``rewind``.

## Implementations
The following algorithms are currently implemented:

- Adler
- Cityhash
- Generic QRNG
- Hammersley
- KISS
- Linear Congruence
- Mersenne Twister
- Middle Square
- Murmurhash
- PCG
- RC4
- Sobol
- Squirrelhash
- TT800
- XKCD
- Xorshift / Yorshift RNGs

The protocol also implements a fallback to the implementation's own ``random-state``.


documentation-utils

qtcore

qtgui

qtools

Visualiser for the random number generators

random-state

Upstream URL

Author

License

random-state

Version:

License:

Authors:

Dependencies:

random-state-viewer

Version:

License:

Authors:

Dependencies:

Dependencies (5)

Dependents (5)