Plugin Support - Creating an Auto Scale plugin

[ikDebris (ケイティ)]

I am probably the 20,000th person to attempt this, but I’m trying to create an auto-scale plugin. I am encountering a few errors; how do I fix them?

-- toolbar locals

local toolbar = plugin:CreateToolbar("OxyScale V1")
local selection = game:GetService("Selection")
local history = game:GetService("ChangeHistoryService")

-- functions

function waypoint()
	history:SetWaypoint("ScaleHistory")
end

function button(name, desc, image, funct)
	local newbutton = toolbar:CreateButton(name, desc, image)
	newbutton.Click:Connect(function()
		waypoint()
		print("button clicked with function", funct)
		if funct == "ScaleSelectedUI" then
			local selectedObjects = selection:Get()

			for index, selected in pairs(selectedObjects) do
				if selected:IsA("GuiObject") then
					print(selected, "is a gui object")

					selected.Size = selected.Size * UDim2.new(1.5, 0, 1.5, 0)
				end
			end
		end
		waypoint()
	end)
end

-- event firing

button(
	"Open Menu",
	"Open the main menu.",
	"rbxassetid://16155692094",
	"OpenMainMenu"
)
button(
	"Scale Selected",
	"Ensure you select any UI elements you wish to scale, after clicking this button to auto-scale the selected elements.",
	"rbxassetid://16155692094",
	"ScaleSelectedUI"
)

  20:22:33.683  user_OxyScale.lua.Script:25: attempt to perform arithmetic (mul) on UDim2  -  Edit

[yoshicoolTV (coolyoshi)]

Do it like this:

selected.Size = UDim2.new(selected.Size.X.Scale * 1.5, selected.Size.X.Offset, selected.Size.Y.Scale * 1.5, selected.Size.Y.Offset

[ikDebris (ケイティ)]

Are you sure this isn’t AI generated? I tried to use AI myself and it gave me the same line of code.

Anyways, I have tried this and it doesn’t change any property at all.

[yoshicoolTV (coolyoshi)]

Thanks for the assumption, but I didn’t use AI, I found a post relating to it

How do I multiply udim2 values?

Exactly what the title says, I am confused on how to do this, I am trying to multiply my offset size by 4 but nothing seem to work. Thanks in advance, have a nice day.

[yoshicoolTV (coolyoshi)]

or as someone else mentioned you can use Udim2.fromScale

How do I multiply udim2 values?

or you could do this

using offset

UDim2.fromOffset(old.X.Offset * 4, old.Y.Offset * 4)

using scale

UDim2.fromScale(old.X.Scale * 4, old.Y.Scale * 4)

[ikDebris (ケイティ)]

Another method I’ve tried that isn’t working.

[markjac]

Have you tried to extract the dimensions from the UDim2, perform the multiplication, and then create a new UDim2 with the values?

selected.Size = UDim2.new(
    selected.Size.X.Scale * 1.5,
    selected.Size.X.Offset * 1.5,
    selected.Size.Y.Scale * 1.5,
    selected.Size.Y.Offset * 1.5
)

[ikDebris (ケイティ)]

This works, however it makes the frame bigger when re-scaled.

I would like it to ensure the UI is always auto-scaled based on each players screen resolution.

[markjac]

Ah I see This will set the Size separately for width and height without directly trying to multiply a UDim2 object. This should prevent errors related to UDim2 .

-- Function to scale a UI element by a specified factor
function scaleUI(UI, scaleFactor)
    -- Get the size of the player's screen (relative to the PlayerGui element)
    local screenSize = game.Players.LocalPlayer:GetMouse().ViewportSize
    
    -- Calculate the new width and height based on the screen size and scaling factor
    local newWidth = screenSize.X * scaleFactor
    local newHeight = screenSize.Y * scaleFactor
    
    -- Set the new size for the UI element separately for width and height
    UI.Size = UDim2.new(0, newWidth, 0, newHeight)
end

-- Example usage with a Frame
local Frame = Instance.new("Frame")
Frame.Parent = game.Players.LocalPlayer:WaitForChild("PlayerGui") -- Assuming it's a child of PlayerGui

-- Scale the Frame using relative sizing to 150% of the screen width and height
scaleUI(Frame, 1.5)

[ikDebris (ケイティ)]

I would like it so when i click the scale button with a roblox plugin, it scales it through there without having to play the game or anything.

How would I do this?

[markjac]

You’d have to find the GUI you want to edit which you already have done

			for index, selected in pairs(selectedObjects) do
				if selected:IsA("GuiObject") then
					print(selected, "is a gui object")

You’d then have to have to have it so when you click the scale button it scales it, using the method I gave above or any other method that will properly scale it.

I’d also add a way for you to easily change the scale factor.

[ikDebris (ケイティ)]

This method is fully configured, there is just one line that returns errors.

local screenSize = game.Players.LocalPlayer:GetMouse().ViewportSize

  21:21:18.792  ViewportSize is not a valid member of PlayerMouse "Instance"  -  Client - LocalScript:1

[ikDebris (ケイティ)]

Whole script

-- toolbar locals

local toolbar = plugin:CreateToolbar("OxyScale V1")
local selection = game:GetService("Selection")
local history = game:GetService("ChangeHistoryService")

-- functions

function waypoint()
	history:SetWaypoint("ScaleHistory")
end

function scaleUI(UI, scaleFactor)
	local screenSize = game.Players.LocalPlayer:GetMouse().ViewportSize
	local newWidth = screenSize.X * scaleFactor
	local newHeight = screenSize.Y * scaleFactor
	UI.Size = UDim2.new(0, newWidth, 0, newHeight)
end

function button(name, desc, image, funct)
	local newbutton = toolbar:CreateButton(name, desc, image)
	newbutton.Click:Connect(function()
		waypoint()
		print("button clicked with function", funct)
		if funct == "ScaleSelectedUI" then
			local selectedObjects = selection:Get()

			for index, selected in pairs(selectedObjects) do
				if selected:IsA("GuiObject") then
					print(selected, "is a gui object")

					scaleUI(selected, 1.5)
				end
			end
		end
		waypoint()
	end)
end

-- event firing

button(
	"Open Menu",
	"Open the main menu.",
	"rbxassetid://16155692094",
	"OpenMainMenu"
)
button(
	"Scale Selected",
	"Ensure you select any UI elements you wish to scale, after clicking this button to auto-scale the selected elements.",
	"rbxassetid://16155692094",
	"ScaleSelectedUI"
)

[markjac]

Oh my bad we need to use the UserInputService to get the ViewportSize. The ViewportSize is not accessible through GetMouse() on the Player I forgot about that.

function scaleUI(UI, scaleFactor)
    local player = game.Players.LocalPlayer
    local mouse = player:GetMouse()
    local inputService = game:GetService("UserInputService")

    local screenSize = inputService:GetViewSize()
    local newWidth = screenSize.X * scaleFactor
    local newHeight = screenSize.Y * scaleFactor
    UI.Size = UDim2.new(0, newWidth, 0, newHeight)
end

[ikDebris (ケイティ)]

This is supposed to be for a plugin, not a LocalScript…

  22:18:52.401  GetViewSize is not a valid member of UserInputService "UserInputService"  -  Edit

[yoshicoolTV (coolyoshi)]

[yoshicoolTV (coolyoshi)]

it’s workspace.CurrentCamera.ViewportSize btw

[ikDebris (ケイティ)]

Using this, I fired the event and the UI size went from {0, 745},{0, 416} to {0, 2037},{0, 1080}

It should be some sort of decimal number.

A plugin script is a server script that is then saved as a local plugin through roblox to act as if it’s a public plugin.