How to make arms and tools stay on screen in Roblox studio? - lua

Question

In games like phantom forces, or any FPS for that matter, if you look up or down, the arms and tools will stay on screen. In a new Roblox studio project, this does not happen by default. Basically I want the arms and tools to follow the camera’s rotation.

Answer 1

This can be done, but do you want other players to see the player turn the gun towards the camera?
local Camera = workspace.CurrentCamera
local Player = game.Players.LocalPlayer
local Character = workspace:WaitForChild(Player.Name)
local Root = Character:WaitForChild("HumanoidRootPart")
local Neck = Character:WaitForChild("UpperTorso"):FindFirstChildOfClass("Motor6D")
local YOffset = Neck.C0.Y
local CFNew, CFAng = CFrame.new, CFrame.Angles
local asin = math.asin
game:GetService("RunService").RenderStepped:Connect(function()
local CameraDirection = Root.CFrame:toObjectSpace(Camera.CFrame).lookVector
if Neck then
if Character.Humanoid.RigType == Enum.HumanoidRigType.R15 then
Neck.C0 = CFNew(0, YOffset, 0) * CFAng(0, -asin(CameraDirection.x), 0) * CFAng(asin(CameraDirection.y), 0, 0)
elseif Character.Humanoid.RigType == Enum.HumanoidRigType.R6 then
Neck.C0 = CFNew(0, YOffset, 0) * CFAng(3 * math.pi/2, 0, math.pi) * CFAng(0, 0, -asin(CameraDirection.x)) * CFAng(-asin(CameraDirection.y), 0, 0)
end
end
end)
This example only works with R15
If you don't want the players to see this, then create a model of the gun from the client's side and stick it on the camera
local Camera = workspace.CurrentCamera
local Player = game.Players.LocalPlayer
local Character = workspace:WaitForChild(Player.Name)
local Root = Character:WaitForChild("HumanoidRootPart")
NAMES = {
screen_gun = "Local_Gun",
model= "Gun",
view = "view"
}
--- For Player
local Gun = {
screen = Instance.new("ScreenGui",Player:FindFirstChildOfClass("PlayerGui")),
obj=Instance.new("ViewportFrame",Player:FindFirstChildOfClass("PlayerGui"):WaitForChild("ScreenGui")),
part =Instance.new("Part",Player:WaitForChild("PlayerGui"):WaitForChild("ScreenGui"):WaitForChild("ViewportFrame")),
mesh = Instance.new("SpecialMesh",Player:WaitForChild("PlayerGui"):WaitForChild("ScreenGui"):WaitForChild("ViewportFrame"):WaitForChild("Part")),
offset = UDim2.new(0.7,0,0.6,0),
cam = Instance.new("Camera",Player:WaitForChild("PlayerGui"):WaitForChild("ScreenGui"):WaitForChild("ViewportFrame")),
offset2 = CFrame.new(Vector3.new(1,1,1),Vector3.new(0,0,0)),
size_view = UDim2.new(0,300,0,300)
}
Gun.obj.CurrentCamera=Gun.cam
Gun.part.Position = Vector3.new(0,0,0)
Gun.obj.Position = Gun.offset
Gun.obj.Size = Gun.size_view
Gun.obj.BackgroundTransparency = 1
Gun.cam.CFrame = Gun.offset2
Gun.screen.Name = NAMES.screen_gun
Gun.part.Name = NAMES.model
Gun.obj.Name = NAMES.view
Gun.part.Size = Vector3.new(1,1,2)
--
Gun.obj.Visible = false
local ToolInHand = false
Character.ChildAdded:Connect(function(obj)
if obj:IsA("Tool") and ( obj:FindFirstChildOfClass("Part") or obj:FindFirstChildOfClass("MeshPart") ) then --
if obj:FindFirstChildOfClass("MeshPart") then
obj:FindFirstChildOfClass("MeshPart").LocalTransparencyModifier = 1
Gun.mesh.MeshId = obj:FindFirstChildOfClass("MeshPart").MeshId
elseif obj:FindFirstChildOfClass("Part") then
obj:FindFirstChildOfClass("Part").LocalTransparencyModifier = 1
end
Gun.obj.Visible = true
ToolInHand = true
end
end)
Character.ChildRemoved:Connect(function(obj)
if obj:IsA("Tool") and ( obj:FindFirstChildOfClass("Part") or obj:FindFirstChildOfClass("MeshPart") ) then
if obj:FindFirstChildOfClass("MeshPart") then
obj:FindFirstChildOfClass("MeshPart").LocalTransparencyModifier = 0
elseif obj:FindFirstChildOfClass("Part") then
obj:FindFirstChildOfClass("Part").LocalTransparencyModifier = 0
end
Gun.obj.Visible = false
ToolInHand = false
end
end)