How to use math.random for instances inside a folder

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#1

Hey! So im making a tower defense game and im working on a lobby music system that randomly switches every time another one ends, and im kinda having a problem bc i never did this before

Can anyone help me?

2 Likes
#2

Where is the script placed? / Show me the script and the Folder

#3

Here is some code that should work.

local MusicFolder = -- folder

local function ChooseMusic()
  local ChosenIndex = math.random(1, #MusicFolder:GetChildren())
  local ChosenMusic = MusicFolder[ChosenIndex]
  return ChosenMusic
end

edit: realised it was about music

2 Likes
#4 
local MapsFolder = -- folder

local function ChooseMap()
  local ChosenMap = MapsFolder[math.random(1, #MapsFolder:GetChildren())]
  return ChosenMap
end

modified

1 Like
#5 
local MFolder = -- // Insert folder name here

MFolder[math.random(1, #MFolder)]:Play()
-- // Or 
MFolder[math.random(1, #MFolder:GetChildren())]:Play()

-- // Or

MFolder[math.random(1, #MFolder):Play()]

-- // Wasn't coding this for long time
1 Like
#6 
local Folder = script.MusicFolder --folder path

function getRandomSong()
	local songs = Folder:GetChildren()
	local index = math.random(1, #songs)
	return songs[index] 
end)

local chosen = getRandomSong()
print(chosen.Name, chosen.SoundId)

If you want to avoid duplicates in a row, you may want to use a chances system:

local Folder = script.MusicFolder

local chances = {}

function IncreaseChances()
	for _, song in pairs(Folder:GetChildren()) do 
		if not chances[song] then 
			chances[song] = 0 
		end
		chances[song] += 1
	end
end

function ConvertChancesToArray()
	local array = {}
	for song, chance in pairs(chances) do 
		for i = 1, chance do 
			table.insert(array, song)
		end
	end
	return array 
end

function PickSong()
	local array = ConvertChancesToArray()
	local chosen = array[math.random(1, #array)] 
	IncreaseChances()
	chances[chosen] = 0
	return chosen 
end

IncreaseChances()

--wont pick the same song twice in a row, the chances increase when a song hasn't been played for a long time.
while task.wait(.1) do 
	local song = PickSong()
	print(song.Name, song.SoundId)
end
3 Likes
#7

Thx for the help! this also helped to make other systems!

#8

Thx for the help! But its only lobby musics and not for the maps

#9

Thx! This helped me to understand more about it!

#10

Yooo thx i needed this! ima mark your response as solution cuz i also needed that system!

1 Like
#11

then change it to music