Random number in W3

[mr po]

I am planning to make a gambling map, are the random numbers in this game functions well like how you expect the 100% randomness of dice roll or lottery ticket?

If not, how can i trigger a 100% random number?

 

[Jampion]

Pseudorandom number generator - Wikipedia

There is no way to trigger random numbers by yourself. You always rely on some random function from the engine. Your best shot is using the functions available.

 

[Chaosy]

I think most randoms are based on the local computer time somehow, so technically not random.
But it is pretty hard to abuse so I would not bother.

 

[LeP]

I have reversed GetRandomInt partially here

 

[The_Silent]

Also make sure "Use Fixed Random Seed" isn't ticked in Preferences, or you'll get the same random numbers each time you test the map.

 

[Jampion]

Also make sure you are not in a cinamitc. The GUI action to start a cinematic locks the random seed to a certain value. If cinematic mode is ended, the seed is reverted.
You can change this, but you will need JASS for that.

 

[Dr Super Good]

If cinematic mode is ended, the seed is reverted.

Is it? I thought it just changed the seed to something based on the seed before, and not revert it.

 

[TriggerHappy]

I have reversed GetRandomInt partially here

Here is an implementation of GetRandomInt & SetRandomSeed in python as well.

As for the how cinematics affect the seed:

if (cineMode) then
    // Save the UI state so that we can restore it later.
    if (not bj_cineModeAlreadyIn) then
        set bj_cineModeAlreadyIn = true
        set bj_cineModeSavedSeed = GetRandomInt(0, 1000000)
    endif

    // Use a fixed random seed, so that cinematics play consistently.
    call SetRandomSeed(0)
else
    set bj_cineModeAlreadyIn = false

    // Perform global changes
    call SetRandomSeed(bj_cineModeSavedSeed)
endif