Tool not moving with view model arms (FPS)

Help and Feedback Scripting Support
#1

I’ve followed these two tutorials:
devforum.roblox.com/t/easyfirstperson-drag-and-drop-first-person-view-models/1198782 (arm tutorial)
devforum.roblox.com/t/how-to-animate-tool-parts-guns-knifes-etc/359484 (animation tutorial)
and ended up with a pretty nice product but I ran into a problem. The tool stays the same place while the arms move but of the way I animated the tool. Is there a way I can fix this while still keeping the same animation?
Video of the issue:
https://gyazo.com/e5c51105860a571390a38d2cdc9bfd87

Thanks for your time!

#2

the script would be nice.

#3

Whoops I forgot about that!
Here is the script for making the arms follow the cursor / camera movement:

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local Player = Players.LocalPlayer
local Mouse = Player:GetMouse()

local Character = Player.Character or Player.CharacterAdded:Wait()
local Torso = Character:WaitForChild("Torso") :: BasePart
local RightArm = Character:WaitForChild("Right Arm") :: BasePart
local LeftArm = Character:WaitForChild("Left Arm") :: BasePart
local LeftShoulder = Torso:WaitForChild("Left Shoulder") :: Motor6D
local RightShoulder = Torso:WaitForChild("Right Shoulder") :: Motor6D
local Humanoid = Character.Humanoid :: Humanoid

local OffsetMouseYAngle = math.rad(15)

RunService.RenderStepped:Connect(function()

if Humanoid.Sit then return end

local mouseYAngle = math.asin((Mouse.Hit.Position - Mouse.Origin.Position).Unit.Y) - OffsetMouseYAngle

if LeftShoulder and LeftArm then

LeftShoulder.C0 = CFrame.new(-1, 0.5, -0.2) * CFrame.Angles(math.rad(70) + mouseYAngle, math.rad(-90), math.rad(52))

end

if RightShoulder and RightArm then

RightShoulder.C0 = CFrame.new(1, 0.5, -0.2) * CFrame.Angles(math.rad(120) + mouseYAngle, math.rad(90), math.rad(-104))

end

end)

The animations use a motor 6D located in the torso to attach to the character and do not have a handle so I can animated the tool in more detail. There is more info on this in the animation tutorial.

#4

Unfortunately fixing this issue is complicated as you are using 2 different systems, and I cant really explain much about it. The trick here is that you would want to replicate the weld system used on the character to the viewmodel. So once there is a viewmodel, you would want to change both the character and viewmodel’s weld properties.

I advised to just create your own viewmodel/first person system, as this is a hacky solution

Here is my system without modifying the viewmodel script:

Server Script

game.Players.PlayerAdded:Connect(function(plr)
	plr.CharacterAdded:Connect(function(char)
		local toolGrip = Instance.new("Motor6D")
		toolGrip.Name = "ToolGrip"
		toolGrip.Parent = char.Torso
		
		char.ChildAdded:Connect(function(child)
			if child:IsA("Tool") then
				local bodyAttach = child:FindFirstChild("BodyAttach", true)
				
				if bodyAttach then
					toolGrip.Part0 = char.Torso
					toolGrip.Part1 = bodyAttach
				end
			end
		end)
		
		char.ChildRemoved:Connect(function(child)
			if child:IsA("Tool") then
				toolGrip.Part1 = nil
			end
		end)
	end)
end)

Local Script on StarterCharacterScripts

local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local torso = character:FindFirstChild("Torso")
local viewmodel
local camera = workspace.CurrentCamera

function setWelds()
	print("viewmodel")
	local toolGrip = torso:FindFirstChild("ToolGrip")
	local toolGripVM = viewmodel.HumanoidRootPart:FindFirstChild("ToolGrip")

	if not toolGripVM then
		toolGripVM = Instance.new("Motor6D")
		toolGripVM.Name = "ToolGrip"
		toolGripVM.Parent = viewmodel.HumanoidRootPart
	end

	if toolGripVM and toolGrip then
		print("toolgrip")
		
		if not toolGrip.Part1 and character:FindFirstChildWhichIsA("Tool") then
			toolGrip:GetPropertyChangedSignal("Part1"):Wait()
		end

		local bodyAttach = toolGrip.Part1

		if bodyAttach then
			print("bodyattach")
			toolGrip.Part1 = nil
			toolGripVM.Part0 = viewmodel.HumanoidRootPart
			toolGripVM.Part1 = bodyAttach
		end
	end
end

function resetWelds()
	local toolGrip = torso:FindFirstChild("ToolGrip")
	local toolGripVM = viewmodel.HumanoidRootPart:FindFirstChild("ToolGrip")
	local bodyAttach
	
	if toolGripVM then
		bodyAttach = toolGripVM.Part1
		toolGripVM.Part1 = nil
	end

	if torso then
		if toolGrip then
			toolGrip.Part1 = bodyAttach
			toolGrip.Part0 = torso
		end
	end
end

camera.ChildAdded:Connect(function(child)
	if child.Name == "Viewmodel" and character then
		viewmodel = child
		setWelds()
	end
end)

camera.ChildRemoved:Connect(function(child)
	if child.Name == "Viewmodel" and character then
		resetWelds()
	end
end)

character.ChildAdded:Connect(function(child)
	if child:IsA("Tool") then
		if viewmodel and viewmodel.Parent == camera then
			setWelds()
		end
	end
end)

character.ChildRemoved:Connect(function(child)
	if child:IsA("Tool") then
		if viewmodel and viewmodel.Parent == camera then
			resetWelds()
		end
	end
end)