A bug is bothering me, anyone to help?

Help and Feedback Scripting Support
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1

In short, I’m a big fan of a mobile game called “Dancing Line” and I’m trying to recreate something similar on Roblox and I’m getting a good result, but something that’s bothering me is that the corners of the line always look a little weird when I play.

Demo gameplay:

The problem:

Captura de tela 2025-06-01 005506
Captura de tela 2025-06-01 005506223×196 39.1 KB

As you can see, the corners look weird and I’ve tried several ways but I haven’t been able to fix them. Can anyone tell me what it could be?

Movement script I made:

local RunService = game:GetService("RunService")
local Debris = game:GetService("Debris")

local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid: Humanoid = character:WaitForChild("Humanoid")
local hrp: BasePart = character:WaitForChild("HumanoidRootPart")
local gui = script.Parent
local line = gui.LinePart
local text = gui.Text
local move = gui.Move

local idle = true
local lineEnabled = true
local direction: string = nil
local left = Vector3.new(0, 0, -2048)
local right = Vector3.new(-2048, 0, 0)
local currentLine = nil
local lastPosition = nil

local lineFolder = workspace:FindFirstChild("Line")
if not lineFolder then
	lineFolder = Instance.new("Folder")
	lineFolder.Name = "Line"
	lineFolder.Parent = workspace
end

function NewLine()
	local newLine = line:Clone()
	newLine.Position = hrp.Position
	newLine.Parent = lineFolder
	Debris:AddItem(newLine, 16)
	return newLine
end

function Move(to: string)
	lastPosition = hrp.Position
	
	if to == "Left" then
		direction = "Left"
		humanoid:MoveTo(hrp.Position + left)
		currentLine = NewLine()
		
	elseif to == "Right" then
		direction = "Right"
		humanoid:MoveTo(hrp.Position + right)
		currentLine = NewLine()
	end
end

move.Pressed:Connect(function()
	if idle then
		idle = false
		text:Destroy()
		Move("Left")
		return
	end
	
	if direction == "Left" then
		Move("Right")
	else
		Move("Left")
	end
end)

humanoid.StateChanged:Connect(function(oldState, newState)
	if newState == Enum.HumanoidStateType.Freefall then
		lineEnabled = false
	elseif newState == Enum.HumanoidStateType.Landed then
		lineEnabled = true
		Move(direction)
	end
end)


RunService.Stepped:Connect(function()
	if not idle and lineEnabled then
		if currentLine then
			currentLine.Position = lastPosition:Lerp(hrp.Position, 0.5)
			if direction == "Left" then
				currentLine.Size = Vector3.new(2, 2, (hrp.Position - lastPosition).Magnitude + 2)
			else
				currentLine.Size = Vector3.new((hrp.Position - lastPosition).Magnitude + 2, 2, 2)
			end
		end
	end
end)

Thank you to everyone who tries to help! <3

2

DANCING LINE GOAT GOAT GOAT

anyway, i wouildn’t call this a bug
i am very stupid (everyone knows this), but i am pretty sure this random ‘corner’ is caused by the part changing directions on a different frame, where it has a different position

i glanced over your code, but this is my first thought;

although you could work around this by setting the position of the ‘cube’ on the previous line index, and then rotating its direction, that way it shouldn’t make these corners

3

Uhm Not Sure But. It Maybe Collision Glitch Or Just Trying To:

SERVER SCRIPT

game.Players.PlayerAdded(plr)
 local newroot = Instance.new("Part", workspace) --Act This As A Char, You Can Over Write Your Past Function To This
 newroot.Name = plr.Name
 plr.Character:Wait() -- Wait Fr Char
 plr.Char.Parent = game.ReplacedStorage -- Store Char
end)

CLIENT SCRIPT

task.wait(0.)
workspace:WaitForChild("Camera").CameraSubject = workspace:WaitForChild(game.Players.LocalPlayer.Name)

That All I Can Help.

Or Just Disable Auto Rotate On Char

4

I’m sure you can optimize this;

MainLoop 
RunService.Stepped:Connect(function()
	if not idle and lineEnabled and currentLine then
		local delta = hrp.Position - lastPosition
		local length = delta.Magnitude + 2
		local center = lastPosition + delta * 0.5

		if direction == "Left" then
			currentLine.Size = Vector3.new(2, 2, length)
			currentLine.CFrame = CFrame.new(center, center + delta.Unit)
		else
			currentLine.Size = Vector3.new(length, 2, 2)
			currentLine.CFrame = CFrame.new(center, center + delta.Unit)
		end
	end
end)