On Mon, 4 Apr 2011, michael rice wrote:
I forgot to mention, I'm using the random number tile and scripting. Does that
make it more difficult?
Not really, RandomNumberTile uses the global random number generator of
Collection. I don't know how/why is it serialized/restored, but here's a
method which should help:
RandomNumberTile >> #comeFullyUpOnReload: smartRefStream
| seed |
[
seed := (Time millisecondClockValue bitAnd: 16r3FFFFFFF)
bitXor: self hash.
seed := seed bitXor: (Time totalSeconds bitAnd: 16r3FFFFFFF).
seed := seed bitXor: 16r3FFFFFFF atRandom.
seed = 0 ] whileTrue. "Try again if ever get a seed = 0"
Collection mutexForPicking critical: [
Collection randomForPicking seed: seed ].
^super comeFullyUpOnReload: smartRefStream
It's drawback is that it will reseed the rng for every RandomNumberTile.
The best solution would be if Etoys would use a custom Random instance or
a subclass where this is done by default.
Levente
Michael
--- On Mon, 4/4/11, Levente Uzonyi <le...@elte.hu> wrote:
From: Levente Uzonyi <le...@elte.hu>
Subject: Re: [Newbies] Randomness
To: "A friendly place to get answers to even the most basic questions about Squeak."
<beginners@lists.squeakfoundation.org>
Date: Monday, April 4, 2011, 8:08 PM
On Mon, 4 Apr 2011, michael rice wrote:
I just noticed that when I load a morphic project I get the same stream of
random numbers each time. Is there a simple way to install a new different
random seed each time the project is loaded?
If you serialize the Random object, then it will have the same state when it's
restored. I guess you should create a subclass of Random, which implements
#comeFullyUpOnReload:. That method can reinitialize the seed of the random number
generator. You may want to check UUIDGenerator >> #makeSeed if you don't know
how to get a good seed for your rng.
Levente
Michael
_______________________________________________
Beginners mailing list
Beginners@lists.squeakfoundation.org
http://lists.squeakfoundation.org/mailman/listinfo/beginners
_______________________________________________
Beginners mailing list
Beginners@lists.squeakfoundation.org
http://lists.squeakfoundation.org/mailman/listinfo/beginners
