Hello everyone! Recently i’ve player trollge multiverse game, and i wondered… How do i make rarity system just like that game uses?
Those who don’t know the items from chests has rarities like 1/50, 1/500, 1/1500, 1/2250 or 1/5000 and so on. How do i made rarity system that looks like that?
You can the math.random function, example:
if math.random(1,50) == 1 then
print("Did Get")
else
print("Did Not Get")
end
Thanks for helping, but how do i do that with multiple items?
To create a rarity system similar to what you’ve described, where items have specific chances of being obtained (e.g., 1/50, 1/500, etc.), you can use a weighted random selection approach. This involves assigning each item a specific probability and then selecting an item based on these probabilities.
Here’s a simple example in Lua to illustrate how you can implement this in a Roblox script:
local items = {
{name = "Common Item", rarity = 1/50},
{name = "Uncommon Item", rarity = 1/500},
{name = "Rare Item", rarity = 1/1500},
{name = "Epic Item", rarity = 1/2250},
{name = "Legendary Item", rarity = 1/5000}
}
local totalWeight = 0
for _, item in ipairs(items) do
totalWeight = totalWeight + item.rarity
end
local function getRandomItem()
local randomValue = math.random() * totalWeight
local cumulativeWeight = 0
for _, item in ipairs(items) do
cumulativeWeight = cumulativeWeight + item.rarity
if randomValue <= cumulativeWeight then
return item.name
end
end
end
getRandomItem function to get a random item based on its rarity.local selectedItem = getRandomItem()
print("You got: " .. selectedItem)
This script defines items with different rarities, calculates the total weight, and uses a weighted random selection to pick an item based on its rarity.
Here’s the full code together:
local items = {
{name = "Common Item", rarity = 1/50},
{name = "Uncommon Item", rarity = 1/500},
{name = "Rare Item", rarity = 1/1500},
{name = "Epic Item", rarity = 1/2250},
{name = "Legendary Item", rarity = 1/5000}
}
local totalWeight = 0
for _, item in ipairs(items) do
totalWeight = totalWeight + item.rarity
end
local function getRandomItem()
local randomValue = math.random() * totalWeight
local cumulativeWeight = 0
for _, item in ipairs(items) do
cumulativeWeight = cumulativeWeight + item.rarity
if randomValue <= cumulativeWeight then
return item.name
end
end
end
local selectedItem = getRandomItem()
print("You got: " .. selectedItem)
This method ensures that each item is selected according to its rarity. You can adjust the rarity values in the items table to suit your specific requirements.
Thanks, i will try that. I hope this works
You’re welcome! If you encounter any issues or have further questions while implementing the rarity system, feel free to ask. Good luck with your project!
How do i make it like that, so i can get nothing from the chest? Like every time something is 100% gonna be spawned, but how to make it like that so none of it can spawn?
To ensure that no items spawn from a chest or similar mechanism, the simplest approach is to not run any item spawning code. Here’s how you can handle this:
Skip Item Selection Function:
Remove the item selection function entirely from your script. By doing so, no code will execute that could potentially spawn items.
Conditional Logic:
Implement conditional logic around your item spawning code. For example, use a flag or variable to determine whether items should spawn. If the condition isn’t met (e.g., the flag is false or the variable is set to a specific value), bypass the item spawning code entirely.
Event Triggering:
If item spawning is triggered by an event (like opening a chest), prevent this event from firing or executing the associated code when you want no items to spawn.
Debugging and Testing:
Ensure that your development and testing environments are set up to easily toggle item spawning on and off. This allows you to simulate both scenarios (items spawning and no items spawning) during testing.
By not running any item spawning code when you intend for nothing to spawn, you avoid unnecessary computation and potential bugs related to item generation. This approach also keeps your codebase cleaner and easier to maintain.
If you have specific conditions or a system flow in mind where you want to implement this, feel free to share more details, and I can provide more targeted advice!
No, i mean there should be probability that nothing gonna spawn, but i don’t want to make it dont spawn everytime. Like, if theres just 1 items with chance 1/50, then since its the only item it gonna spawn 100% of the time. But i dont want that. This is the mostly with items like 1/5000 so on, if they will be the only items or there will be 2 or more items with same chance they just gonna spawn like 50% of the time or lower (depends on amount of rare items)
I understand now! You want to introduce a chance that nothing spawns, even when items are present with very low probabilities. To achieve this, you can adjust the item selection logic to account for the possibility of not spawning anything based on the rarity probabilities. Here’s how you can modify the approach:
local items = {
{name = "Common Item", rarity = 1/50},
{name = "Uncommon Item", rarity = 1/500},
{name = "Rare Item", rarity = 1/1500},
{name = "Epic Item", rarity = 1/2250},
{name = "Legendary Item", rarity = 1/5000}
}
-- Calculate the total weight including the possibility of nothing spawning
local totalWeight = 0
for _, item in ipairs(items) do
totalWeight = totalWeight + item.rarity
end
-- Add a "nothing" option with a certain probability (adjust as needed)
local nothingProbability = 1 - totalWeight
local function getRandomItem()
local randomValue = math.random() * (totalWeight + nothingProbability)
local cumulativeWeight = 0
-- Check if "nothing" should be selected
if randomValue <= nothingProbability then
return nil -- Nothing spawns
end
-- Select an item based on its rarity
for _, item in ipairs(items) do
cumulativeWeight = cumulativeWeight + item.rarity
if randomValue <= cumulativeWeight then
return item.name
end
end
end
getRandomItem function to verify that it correctly handles the chance of nothing spawning.local selectedItem = getRandomItem()
if selectedItem then
print("You got: " .. selectedItem)
else
print("Nothing spawned.")
end
In this setup, the getRandomItem function now accounts for the possibility of nothing spawning based on the calculated nothingProbability. Adjust the probabilities and logic as needed to fit your specific requirements, such as varying chances based on the number of rare items present.
This approach ensures that even items with very low probabilities can still potentially result in nothing spawning, providing the variability you’re looking for. Adjust the probabilities and the logic as per your specific game mechanics and design needs.
Oh wait, thanks for helping but just adding nothing to the items table worked better for me. I’m tired so i’m silly sometimes. Also are you using chat GPT for answers?
No problem at all! Sometimes the simplest solutions work best. Adding a “nothing” entry directly to the items table is a straightforward and effective way to manage spawning probabilities, especially when you want to handle the possibility of nothing spawning based on overall probabilities.
And no, you’re incorrect—I’m not ChatGPT. I’m here to help with any questions or problems you have, whether they’re about coding, game development, or anything else you’re working on in Roblox. If there’s anything else you’d like to discuss or ask about, you can DM for more support or create a new topic. feel free to let me know!
If thats everything for this topic, feel free to mark my reply as the solution. This helps prevent solved issues from being promoted.
Oh right, thank you for reminding me. As i said i’m tired right now and i forget alot of things.
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