How would you add a rng system that can account for luck such as a double luck gamepass

[uneven condor]

I’ve been looking everywhere I can for the past day and so and I haven’t found anything helpful, no YouTube videos or anything? Does anyone actually know how to do it properly and can help me.

I understand and know how to make a basic rng system, and I understand the base concept of multiplying the “rare” values to create a increase luck effect, but how would you go about dealing with the rest, the stuff that isn’t changed? And how would you get it to work cleanly?

[pale yoke]

uhhhhh

MultiplierManager module

or something

actually if ur referring to the gamepass then you should just learn MarketplaceService and check if the player owns said gamepass when the player joins the game, then multiply its luck stat accordingly

[uneven condor]

What is that?

[uneven condor]

No no the gamepass isn’t the issue that’s fine, it’s just the logic of returning a value where a 2x multiplier is used

[pale yoke]

Module that stores functions that ease adding multipliers

(its not a resource)

(you gotta make it urself)

(or you could just adapt to the system u use alr to avoid having to redo everything

[pale yoke]

Weell, do you have a script alrrady?

[uneven condor]

For rng yes

But not with luck included

And the gamepass feature is easy

[uneven condor]

I mean I don’t mind if it means it’s more efficient

[uneven condor]

Okay but how would I actually make one

Like the luck stuff

[uneven condor]

@pale yoke

[pale yoke]

aw fuck its a file
im on mob rn i can't do shit

[pale yoke]

you should prob start with adding luck stats to the plr first

and then make a single function for all 4 possible operations that you can do for changing said luck stat

an updateStat function

[uneven condor]

Ahh same lol

[uneven condor]

Well that’s easy

[uneven condor]

Wym all possible 4 operations

[uneven condor]

But then it’s like how you actually make the luck feature

[pale yoke]

you multiply chances based on luck

thats it

[pale yoke]

addition, subtraction, multiplication, division

[uneven condor]

But how would I know what ones to multiple

[pale yoke]

you'd have to multiply all of them

thats just how chances work

and luck

[uneven condor]

But that makes no sense

If I had common of 50%

I wouldn’t multiple it by 2?

Bc then it’s 100%

[pale yoke]

no no you have to multiply LUCK by 2

not the chances

if luck is just 1.56 or sumth

...wait

no wait f luck is +x0.56 (multiplier adding to base luck) then you could just mult that by 2 without too much trouble

[uneven condor]

yes but where do i get luck from yk

[uneven condor]

Yes but how would you go about the rng part, what are we multiplying?

[uneven condor]

what about this?

local module = {}

module.items = {
    ["Celestial"] = 0.001,
    ["Divine"] = 0.01,
    ["Godly"] = 0.05,
    ["Mythic"] = 0.1,
    ["Exotic"] = 1,
    ["Legendary"] = 2.5,
    ["Epic"] = 5,
    ["Rare"] = 10,
    ["Uncommon"] = 26.4,
    ["Common"] = 54.939
}

local function chooseRarity(luck)
    luck = math.max(luck or 1, 1)

    local adjusted = {}
    local totalWeight = 0

    for rarity, chance in pairs(module.items) do
        local rarityFactor = 1 / chance
        local adjustedChance = chance * (1 + ((luck - 1) * rarityFactor * 0.001))
        adjusted[rarity] = adjustedChance
        totalWeight += adjustedChance
    end

    local roll = math.random() * totalWeight
    local cumulative = 0

    for rarity, weight in pairs(adjusted) do
        cumulative += weight
        if roll <= cumulative then
            return rarity
        end
    end

    return "Common"
end

module.chooseItem = function(luck)
    local rarity = chooseRarity(luck)
    return rarity
end

return module

[cosmic root]

u frogot teh colurs. and the prices.

[uneven condor]

Yeah ofc this is just a base example to get the idea right first

[uneven condor]

Apart from that would you say it’s good?

A effective way to do it?

[pale yoke]

uhh

luck should be a player stat managed in a completely different script

thus, remove the luck line under the .chooseRarity() functoon opening

oh also whats weight for

[uneven condor]

Well yes that was just a testing, but could I not just use “player.luck.Value”?

[uneven condor]

Like the total of all the rarities

[cosmic root]

your weighted random is correct, and seems like the luck weight is correct too, so not sure why you need to balance all the weights to sum to 100 if you're doing correct weighted random to start with 🤷

maybe just easier to visualize the chances that way 🤷

[pale yoke]

yeah, as an argument for the function

[uneven condor]

Well yeah it’s easyier to visualise them and add more later while understanding the probability

[uneven condor]

Okay thank you guys let me try all this

[uneven condor]

@cosmic root @pale yoke this is not right..., like it works kind of, if im rolling with 100k luck i shouldnt be able to get commons, really it should be all celestial right?

like the luck is way to scattered for such a high luck rating

this is 1x in the first photo and 2x in second

not much luck i see

it actually went down for how many legendarys

[pale yoke]

...huh.

uhh

is this the same peice of code?

[uneven condor]

Yes

Same piece

Just displayed the values when I got it

But you understand what I mean? Like that scaling isn’t right

Or shouldn’t be in my eyes

[cosmic root]

well thats the thing if you add more later, it will be harder if you do this. what is the odds of 1 when the total weight is 273?

you can calculate it trivially but .. you wouldn't hardcode it to the range of 1~100

[uneven condor]

Yeah but when I say add more, I mean like rarer ones so I would only add stuff like 0.000001 or less

Nothing more then 1

[uneven condor]

But either way the luck system doesn’t really work right now

[uneven condor]

@cosmic root @pale yoke any idea how to fix the luck stuff