Get better random number

[jocasrb]

hi guys! as most of you probably know random_num() are not getting really random numbers on every call (because its 'too much' repetitive), can anyone help with some pseudo-random num function/code ? *random() is even worse than random_num(), can be seen here: https://github.com/alliedmodders/amxmodx/issues/545#issuecomment-418216005

my idea was, because i want to get random player from all alive players,currently code is:

random_num( 1, alive_players )
//if its called on every round start, results will be like ~10 of 15 the same

//idea:

new rand = random_num( 1, alive_players )
if( rand > 2 )
{
return random_num( 1, ( random_num( 2, rand ) )
}
else
{
return rand
}

but im not sure if its convinient..anyone got better solution ? ps: RandomX module is not for linux, so cant work with it

 

[Nordic Warrior]

jocasrb, https://dev-cs.ru/amxx/xs/xs_irand_range/view

 

[jocasrb]

jocasrb, https://dev-cs.ru/amxx/xs/xs_irand_range/view

Do you have any experience with using it?
if i try: xs_irand_range( 1, 99 ) im getting error on compiling:
Empty statament in xs.inc line: 118

from xs.inc:

stock xs_irand_range(pmin, pmax)
{
    xs_assert_dbg(pmax - pmin >= 0, "xs_irand_range: pmin > pmax"); //this is that line
    new i = pmin + floatround(xs_frand() * float(pmax - pmin));
    if (i > pmax)
        i = pmax;
    return i;
}

Also tryed to use xs_irand() but it even doesnt set max possible num (like random(n))...these few are really confusing funcs from xs :D

 

[Lee Armstrong]

You can write a module in C ++ and take random numbers from /dev/random.

 

[fl0wer]

jocasrb, comment this line for avoid assert check.

 

[jocasrb]

fl0wer spasibo for that.

tryed xs_irand_range( 1, 99 )..but on every map start first calling this fucntion gives the same result...that not random i guess :/

 

[fantom]

jocasrb, you can try repeat random function at map start with seconds count (for example) for changing seed. Because it's pseudo random.

 

[jocasrb]

fantom, i tryed something but no matter what, with xs_irand_range i always get same results from start map...if you can give any example, it would help (also i commented line in .include)

on lan random_num( 1, 99 ) gives 'random' nums, but on 30 players, 4-5 rounds one player is repeated, which isnt the real random (im using if random_num > 85 -> player is selected)

to me, random_num( 1, random_num( 2, 99 ) seems more 'random'...will see...

 

[fantom]

jocasrb, take a look at here WarmUp (Prepare_Item).
Or another way is to get current seconds in time and make random with this count

new secs; time(.second = secs);
    for (new i; i < secs;i++) {
        random(10000);
    }

Also one hack is to use a larger numbers. For example:

random(1000) % 3

It give you a random 0-2.

It's not a best methods. But don't forget random is pseudo

 

[jocasrb]

fantom thanks for explanation!
How i understood,

if( random_num( 1000 ) % 3 == 0 )

Is really better than my prevously attempts?

 

[jocasrb]

after 1y 6months, why not new solution:

new plrs[ 32 ], pnum
get_players( plrs, pnum, "ch" )

iRandom = pnum % 5 (meaning you will get nums from 0 to 4)

cant see better 'human' factor than players online, maybe it will help for someone

 

[irrumabo_me_nomen]

jocasrb, If you want to get a random number at a random point in time, then you can use the time value in the calculation.
get_systime
You can also read the actions of the players. They are usually random.

 

[jocasrb]

irrumabo_me_nomen Yeah, even a only 'minute' number of current time is better cuz get players always gives 32/32 :p

What is the idea for 'player action' ?

 

[irrumabo_me_nomen]

jocasrb, You can get the number based on click rate for example or based on some other action depending on the player.
You can also get into account the frequency selection of numbers. If the frequency is too high for the selected number, then select the one with the minimum frequency.

 

[jocasrb]

Yeah, interesting observation! I will stick with get_systime()/get_gametime() its enoughly for this puprose. Spasibo!