If you're interested, here's an algorithm that someone else posted on
this list awhile back. My apologies, but I can't remember who to credit
it to. I analyzed it and it seems tobe pretty good, although I don't
claim to understand the math. :)
static const S32 J_RAND32_MAX = 2147483647L;
static S32 glCurrentSeed = 0xED0000ED; // a good default, must never be
zero!
static const double cdRandScale = 1.0 / 2147483648.0; // will never hit
1.0
// calculates the next random number and puts the value in glCurrentSeed
//
U32 j_Rand()
{
U32 ulLoWord, ulHiWord;
ulLoWord = 16807 * (glCurrentSeed & 0xffff);
ulHiWord = 16807 * (U32(glCurrentSeed) >> 16);
ulLoWord += (ulHiWord & 0x7fff) << 16;
if (ulLoWord > J_RAND32_MAX)
{
ulLoWord &= J_RAND32_MAX;
ulLoWord++;
}
ulLoWord += ulHiWord >> 15;
if (ulLoWord > J_RAND32_MAX)
{
ulLoWord &= J_RAND32_MAX;
ulLoWord++;
}
glCurrentSeed = ulLoWord;
return (U32) glCurrentSeed;
}
Robert Cohen wrote:
>
> I had that problem.
>
> Rob
>
> -----Original Message-----
> From: Aaron Ardiri [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, July 20, 2000 9:40 AM
> To: Palm Developer Forum
> Subject: Re: Random number
>
> > How can I generate random numbers?
>
> SysRandom()
>
> but, maybe you want to generate your own :P SysRandom() works fine
> for me, but previous investigation by people on the list has proven
> that it does not generate a good set of random numbers
>
> cheers
>
> az.
> --
> Aaron Ardiri
> Java Certified Programmer http://www.hig.se/~ardiri/
> University-College i Gavle mailto:[EMAIL PROTECTED]
> SE 801 76 Gavle SWEDEN
> Tel: +46 26 64 87 38 Fax: +46 26 64 87 88
> Mob: +46 70 656 1143 A/H: +46 8 668 78 72
>
> if you enjoy it, then it aint work :) - rule #106 of life
>
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