Spawning Random Cubes from a Folder with Rarity

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#1

I’m trying to make a part that spawns a random cube from a folder. I’m having some trouble figuring out how I would do that. I’d also like to be able to control the chances of certain cubes spawning.

local spawnerPart = script.Parent

local cubes = workspace.Cubes.Basic

local maxCubes = 10
local spawnedCubes = 0

while true do
	if spawnedCubes < maxCubes then
		--Spawn the Cubes
		spawnedCubes += 1
	elseif spawnedCubes == maxCubes then
		print("Max Cubes")
		wait(3)
	end
end
#2

Sorry wasn’t sure if that was the problem or not …
Here is a quicky. Keys off the size of the “spawner”
Tried to use your code a bit. Or atleast match up to it.

task.wait(3)

local cube = workspace.Cubes.Basic.Cube
local spawner = script.Parent
local sX = spawner.Size.X
local sZ = spawner.Size.Z
local sY = spawner.Position.Y + 
	spawner.Size.Y /2 + cube.Size.Y /2
local pause = 1

function SpawnArea()
	local X = math.random(-sX /2, sX /2)
	local Z = math.random(-sZ /2, sZ /2)
	local spot = Vector3.new(X, sY, Z)
	return spot
end

function PlaceCube()
	local clone = cube:Clone()
	local spot = SpawnArea()
	clone.Parent = workspace
	clone.Position = spot
	task.wait(pause)
end

local maxCubes = 10
local spawnedCubes = 0

while true do
	if spawnedCubes < maxCubes then
		
		PlaceCube()
		spawnedCubes += 1
		if spawnedCubes == maxCubes then 
			break
		end
	end
end

print(spawnedCubes)

Drop this script in the baseplate, set the pause to 0.01 and the maxCubes to 500. :slight_smile: (for testing).

#3

Thanks for clearing that up, but my main issue is the spawning the actual cubes. Any idea how I could do that?

1 Like
#4

To select something in a weighted-random fashion you just need to map a randomly selected number’s range on to a list of possible cubes. math.random() returns a value between 0.0 and 1.0. If you want one cube to have a 10% chance and another cube to have 90% chance, then a value between 0.0 and 0.1 should spawn the rare cube and values over 0.1 should spawn the common cube.

#5

So how I would select a child of the folder to spawn in? I don’t think that GetChildren would work in this case, so I’m not sure how I could get the children of the folder and select one randomly

#6

Make the selection in your code then look up the cube model using its name. You could have a table like this:

local chances = {
	["rareCube"] = 0.1,
	["commonCube"] = 0.9,
}

local function SelectCube()
	local r = math.random()

	for cubetype, chance in pairs(chances) do
		r -= chance
		if r <= 0 then
			return cubetype
		end
	end
end

local cubeToSpawn = CubeFolder[SelectCube()]:Clone()
How would i randomize it
#7

Use a random.new():nextnumber(chance), This will make it more accurate. And for tables, use ipairs instead of pairs

#8

The order the table is iterated does not matter in this implementation. I’m not familiar with nextnumber().