Ello! How can you make a rts selection box, like this:
I hope you can help me
3 Likes
What have you tried so far? What smaller pieces have you broken the problem into? Do you have any initial ideas?
1 Like
you can create a variable storing the mouse position when it clicks and do some
easy math thingies
Explorer:
LocalScript:
local UserInputService = game:GetService("UserInputService")
local Players = game:GetService("Players")
local Player = Players.LocalPlayer
local Mouse = Player:GetMouse()
local SelectionBox = script.Parent:WaitForChild("SelectionFrame", math.huge) -- "SelectionBox is not a valid member of ScreenGui"
local ClickedOn = nil
UserInputService.InputBegan:Connect(function(Input, GameProcessed)
if GameProcessed then
return
end
if Input.UserInputType == Enum.UserInputType.MouseButton1 then
ClickedOn = Vector2.new(Mouse.X, Mouse.Y)
SelectionBox.Visible = true
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X, ClickedOn.Y)
end
end)
UserInputService.InputEnded:Connect(function(Input)
if Input.UserInputType == Enum.UserInputType.MouseButton1 then
ClickedOn = nil
SelectionBox.Visible = false
end
end)
UserInputService.InputChanged:Connect(function()
if ClickedOn then
local X = Mouse.X - ClickedOn.X
local Y = Mouse.Y - ClickedOn.Y
SelectionBox.Size = UDim2.fromOffset(X, Y)
end
end)
7 Likes
Sorry to bug, may I ask what is the best way to implement the function of selection with this ui?
what
what do you mean
Selecting troops or Npc’s for an rts game.
my bad i was confused on what he said
local Camera = workspace.CurrentCamera
local SelectionLocation = -- the location of where the selections thingy be
local function GetSelectedParts()
local SelectedParts = {}
for i, Part in SelectionLocation:GetDescendants() do
if not Part:IsA("BasePart") then
continue
end
local PosOnScreen = Camera:WorldToScreenPoint(Part.Position)
-- convert the position to the screen thingy
if
PosOnScreen.X < (SelectionBox.AbsolutePosition.X + SelectionBox.AbsoluteSize.X) and PosOnScreen.X > (SelectionBox.AbsolutePosition.X) and
PosOnScreen.Y < (SelectionBox.AbsolutePosition.Y + SelectionBox.AbsoluteSize.Y) and PosOnScreen.Y > (SelectionBox.AbsolutePosition.Y)
-- check if the pos on screen is inside the selection frame
then
table.insert(SelectedParts, Part)
end
end
return SelectedParts
end
4 Likes
thanks! it works. But, when I try and use left click and then drag the selection box to the right. It does not select troops. It only works when I drag the selection box to the left, how do I fix this?
1 Like
the reason was because the ui size is on negative so the thingy that checks if the position is in the ui gets confused so here is the solution
local UserInputService = game:GetService("UserInputService")
local Players = game:GetService("Players")
local Player = Players.LocalPlayer
local Mouse = Player:GetMouse()
local SelectionBox = script.Parent:WaitForChild("SelectionFrame", math.huge) -- "SelectionBox is not a valid member of ScreenGui"
local Camera = workspace.CurrentCamera
local SelectionLocation = -- the location of where the selections thingy be
local ClickedOn = nil
local function GetSelectedParts()
local SelectedParts = {}
for i, Part in SelectionLocation:GetDescendants() do
if not Part:IsA("BasePart") then
continue
end
local PosOnScreen = Camera:WorldToScreenPoint(Part.Position)
if
PosOnScreen.X < (SelectionBox.AbsolutePosition.X + SelectionBox.AbsoluteSize.X) and PosOnScreen.X > (SelectionBox.AbsolutePosition.X) and
PosOnScreen.Y < (SelectionBox.AbsolutePosition.Y + SelectionBox.AbsoluteSize.Y) and PosOnScreen.Y > (SelectionBox.AbsolutePosition.Y)
then
table.insert(SelectedParts, Part)
end
end
return SelectedParts
end
UserInputService.InputBegan:Connect(function(Input, GameProcessed)
if GameProcessed then
return
end
if Input.UserInputType == Enum.UserInputType.MouseButton1 then
ClickedOn = Vector2.new(Mouse.X, Mouse.Y)
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X, ClickedOn.Y)
end
end)
UserInputService.InputEnded:Connect(function(Input)
if Input.UserInputType == Enum.UserInputType.MouseButton1 then
ClickedOn = nil
SelectionBox.Visible = false
end
end)
UserInputService.InputChanged:Connect(function()
if ClickedOn then
local X = Mouse.X - ClickedOn.X
local Y = Mouse.Y - ClickedOn.Y
if X < 0 then
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X + X, ClickedOn.Y)
X = math.abs(X)
end
if Y < 0 then
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X, ClickedOn.Y + Y)
Y = math.abs(X)
end
SelectionBox.Size = UDim2.fromOffset(X, Y)
SelectionBox.Visible = true
end
end)
or here are the fixed lines
UserInputService.InputChanged:Connect(function()
if ClickedOn then
local X = Mouse.X - ClickedOn.X
local Y = Mouse.Y - ClickedOn.Y
if X < 0 then
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X + X, ClickedOn.Y)
X = math.abs(X)
end
if Y < 0 then
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X, ClickedOn.Y + Y)
Y = math.abs(X)
end
SelectionBox.Size = UDim2.fromOffset(X, Y)
SelectionBox.Visible = true
end
end)
4 Likes
Hey! Sorry if it Bothers you, But I was wondering on how to make the selection box work on any direction. It got quite annoying when trying to select troops.
I don’t know how to make that or add that in.
Could you provide a solution to this (step by step guide) or a script (sorry if it’s rude)
Thanks.
i didnt know what caused the issue but I fixed it somehow
UserInputService.InputBegan:Connect(function(Input, GameProcessed)
if GameProcessed then
return
end
if Input.UserInputType == Enum.UserInputType.MouseButton1 then
ClickedOn = Vector2.new(Mouse.X, Mouse.Y)
SelectionBox.Size = UDim2.fromOffset()
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X, ClickedOn.Y)
end
end)
UserInputService.InputChanged:Connect(function()
if ClickedOn then
local X = Mouse.X - ClickedOn.X
local Y = Mouse.Y - ClickedOn.Y
SelectionBox.Position = UDim2.fromOffset(ClickedOn.X - (X < 0 and -X or 0), ClickedOn.Y - (Y < 0 and -Y or 0))
SelectionBox.Size = UDim2.fromOffset(math.abs(X), math.abs(Y))
SelectionBox.Visible = true
end
end)
3 Likes
How did you store them and make them move together?