How does random() work? A question to think about - Printable Version
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How does random() work? A question to think about - Jochemd - 09.01.2012
Hello,
I was wondering a bit how the server actually picks a number when using random. I can't even imagine how it works? How is it made?
Jochem
Re: How does random() work? A question to think about - Babul - 09.01.2012
i dont remember which method is used by samp, but have a look here:
http://en.wikipedia.org/wiki/Pseudo-...mber_generator
Re: How does random() work? A question to think about - vincee - 09.01.2012
^ WHAT THE FUCK IS THAT?
Gotta love the powers of scripting... so unbelievable
Re: How does random() work? A question to think about - Wesley221 - 09.01.2012
The rabbit in your computer points at a number, and that will be the random number which will come out of the random() function. Most logical reason found for this
Re: How does random() work? A question to think about - RyDeR` - 09.01.2012
This is how random in PAWN works:
pawn Код:
#define INITIAL_SEED 0xcaa938dbL
static unsigned long IL_StandardRandom_seed = INITIAL_SEED; /* always use a non-zero seed */
#define IL_RMULT 1103515245L
static cell AMX_NATIVE_CALL core_random(AMX *amx,const cell *params)
{
unsigned long lo, hi, ll, lh, hh, hl;
unsigned long result;
/* one-time initialization (or, mostly one-time) */
#if !defined SN_TARGET_PS2 && !defined _WIN32_WCE && !defined __ICC430__
if (IL_StandardRandom_seed == INITIAL_SEED)
IL_StandardRandom_seed=(unsigned long)time(NULL);
#endif
(void)amx;
lo = IL_StandardRandom_seed & 0xffff;
hi = IL_StandardRandom_seed >> 16;
IL_StandardRandom_seed = IL_StandardRandom_seed * IL_RMULT + 12345;
ll = lo * (IL_RMULT & 0xffff);
lh = lo * (IL_RMULT >> 16 );
hl = hi * (IL_RMULT & 0xffff);
hh = hi * (IL_RMULT >> 16 );
result = ((ll + 12345) >> 16) + lh + hl + (hh << 16);
result &= ~LONG_MIN; /* remove sign bit */
if (params[1]!=0)
result %= params[1];
return (cell)result;
}
Re: How does random() work? A question to think about - Jochemd - 09.01.2012
Neat code or not, this random stuff is beyond me.
Re: How does random() work? A question to think about - Jochemd - 09.01.2012
Quote:
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Originally Posted by ******
 That's interesting! I didn't realise "random(0)" generated a full 31-bit random number instead of one constrained to a given range.
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Btw ******, are you a bot? =D
Re: How does random() work? A question to think about - Jochemd - 09.01.2012
Quote:
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Originally Posted by ******
No, why would you think that?
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