Viewmodel (actually character) arms move with jitter when rotating camera

Help and Feedback Scripting Support
#1

Looking around in first person causes this jittery effect to occur:


Code follows.

local limbStuff = {
	head = {
		motor = torso:WaitForChild("Neck") :: Motor6D,
		default = CFrame.new(0, 1, 0) * CFrame.Angles(math.rad(-90), math.rad(-180), 0),
		last = CFrame.new(0, 1, 0) * CFrame.Angles(math.rad(-90), math.rad(-180), 0)
	},
	rightarm = {
		motor = torso:WaitForChild("Right Shoulder") :: Motor6D,
		default = CFrame.new(1, 0.5, 0) * CFrame.Angles(0, math.rad(90), 0),
		last = CFrame.new(1, 0.5, 0) * CFrame.Angles(0, math.rad(90), 0)
	},
	leftarm = {
		motor = torso:WaitForChild("Left Shoulder") :: Motor6D,
		default = CFrame.new(-1, 0.5, 0) * CFrame.Angles(0, math.rad(-90), 0),
		last = CFrame.new(-1, 0.5, 0) * CFrame.Angles(0, math.rad(-90), 0)
	},
}

-- Functions

local function fp()
	if head and head.LocalTransparencyModifier >= 0.9 then
		return true
	end
	
	return false
end

local function tween(sender: Player, data: {})
	for _, v in next, data do
		local joint = nil
		local cframe = nil

		for _, v in next, v do
			if typeof(v) == "Instance" and v:IsA("Motor6D") then
				joint = v
			elseif typeof(v) == "CFrame" then
				cframe = v
			end
		end

		if joint and cframe then
			if fp() then
				joint.C0 = cframe -- not tween noob
			else
				TweenService:Create(
					joint,
					TweenInfo.new(sender == player and 0.1 or 0.2),
					{ C0 = cframe }
				):Play()
			end
			
			--joint.C0 = cframe
		end
	end
end

local function arms()
	local camDirection = rootPart.CFrame:ToObjectSpace(camera.CFrame).LookVector
	local something = math.asin(camDirection.Y)
	
	rightArm.LocalTransparencyModifier = rightArm.Transparency
	leftArm.LocalTransparencyModifier = rightArm.Transparency
	
	local data = {
		{limbStuff.head.motor, CFrame.new(0, limbStuff.head.default.Y, 0) 
			* CFrame.Angles(3 * math.pi / 2, 0, math.pi) 
			* CFrame.Angles(0, 0, -math.asin(camDirection.X))
			* CFrame.Angles(-math.asin(camDirection.Y), 0, 0)},
		{limbStuff.rightarm.motor, limbStuff.rightarm.default},
		{limbStuff.leftarm.motor, limbStuff.leftarm.default}
	}
	
	if fp() then
		-- this noob
		data[2][2] = torso.CFrame:ToObjectSpace(camera.CFrame) * CFrame.new(1, -1.25, -0.9) * CFrame.Angles(0, math.rad(90), 0)
		data[3][2] = torso.CFrame:ToObjectSpace(camera.CFrame) * CFrame.new(-1, -1.25, -0.9) * CFrame.Angles(0, math.rad(-90), 0)
	elseif character:FindFirstChildOfClass("Tool") then
		data[2][2] = limbStuff.rightarm.default * CFrame.Angles(0, 0, something)
		data[3][2] = limbStuff.leftarm.default * CFrame.Angles(0, 0, -something)
	end
	
	tween(player, data)
	
	replicateEvent:FireServer(data)
end

-- Main

RunService.RenderStepped:Connect(arms)
#2

Pretty much tweening, would fix that jitteriness.

2 Likes
#3

i think using a .RenderStepped or :BindToRenderStep() would be a lot better than this