Moving model is shaking on the server side

RedstoneGyerek · September 26, 2023, 3:51pm

hi, i made a helicopter but i have a little issue with the movement

so, basicly when i take off, it starts to vibrate, its only visible on the server side, but it causes some calculation issues, like the speedometer (it randomly shows numbers between 1 and 60 knots)

i tried lowering the rotor speed, then i fixed the .05 stud gap between the rotor and body attachment points, but it did very little to it (the vibration is not visible anymore, but the speedometer is still crazy)

any ideas how can i fix this?

Hiyshhiysh · September 26, 2023, 4:50pm

How doe your helicopter work?

(what I mean is can I see the code)

RedstoneGyerek · September 26, 2023, 5:19pm

this is the main script
its a little weird because a never made a heli before

local body = script.Parent.Body
local rot = script.Parent.Main_Rotor.HingeConstraint
local rot2 = script.Parent.Tail_Rotor.HingeConstraint
local tork = script.Parent["torqe counter"].HingeConstraint
local steer = script.Parent["steering mechanism"].HingeConstraint

local tomeg = 0
local suly = 0
for _,v in pairs(script.Parent.Body:GetChildren()) do
	if v:IsA("Seat") or v:IsA("BasePart") then
		tomeg = tomeg + v.Mass
	end
end
tomeg = tomeg + script.Parent.Main_Rotor.Mass + script.Parent.Tail_Rotor.Mass + script.Parent["torqe counter"].Mass + script.Parent["steering mechanism"].Mass
suly = tomeg * workspace.Gravity
suly = suly * 3.0955

local megy = false

local function leall()
	megy = false

	local plr = game.Players:FindFirstChild("RedstoneGyerek")
	local gui = plr.PlayerGui["heli gui"]
	local fram = gui.Frame

	fram.engi.BackgroundColor3 = Color3.fromRGB(11, 106, 0)
	gui.Enabled = false
	body["engine sound"].jet.Playing = false
	body["blade sound"].blade.Playing = false
	rot.AngularVelocity = 0
	rot2.AngularVelocity = 0
	tork.AngularVelocity = 0
	
	suly = tomeg * workspace.Gravity
end

body.driver.Changed:Connect(function()
	if body.driver.Velocity.Magnitude > 5 then
		body["engine sound"].jet.PlaybackSpeed = (body.driver.Velocity.Magnitude / 10000) * 0.025
		body["blade sound"].blade.PlaybackSpeed = (body.driver.Velocity.Magnitude / 10000) * 0.025
	else
		body["engine sound"].jet.PlaybackSpeed = 1
		body["blade sound"].blade.PlaybackSpeed = 1
	end
	
	if body.driver.Occupant then
		if not megy then
			megy = true
			local hum = body.driver.Occupant
			local char = hum.Parent
			if char.Name == "RedstoneGyerek" then
				local plr = game.Players:FindFirstChild("RedstoneGyerek")
				local gui = plr.PlayerGui["heli gui"]
				local fram = gui.Frame
				
				local w_on = gui["heli control"].w_on
				local a_on = gui["heli control"].a_on
				local s_on = gui["heli control"].s_on
				local d_on = gui["heli control"].d_on
				local e_on = gui["heli control"].e_on
				local q_on = gui["heli control"].q_on
				local w_off = gui["heli control"].w_off
				local a_off = gui["heli control"].a_off
				local s_off = gui["heli control"].s_off
				local d_off = gui["heli control"].d_off
				local e_off = gui["heli control"].e_off
				local q_off = gui["heli control"].q_off
				
				local w = false
				local a = false
				local s = false
				local d = false
				local e = false
				local q = false

				gui.Enabled = true

				body["engine sound"].start:Play()
				rot.AngularVelocity = 500
				rot2.AngularVelocity = 100
				tork.AngularVelocity = -500
				fram.engi.BackgroundColor3 = Color3.fromRGB(30, 255, 0)
				wait(0.3)
				fram.engi.BackgroundColor3 = Color3.fromRGB(11, 106, 0)
				wait(0.3)
				fram.engi.BackgroundColor3 = Color3.fromRGB(30, 255, 0)
				wait(0.3)
				fram.engi.BackgroundColor3 = Color3.fromRGB(11, 106, 0)
				wait(0.3)
				fram.engi.BackgroundColor3 = Color3.fromRGB(30, 255, 0)
				wait(0.3)
				fram.engi.BackgroundColor3 = Color3.fromRGB(11, 106, 0)
				wait(0.3)
				fram.engi.BackgroundColor3 = Color3.fromRGB(30, 255, 0)
				wait(3.2)
				body["engine sound"].jet.Playing = true
				body["blade sound"].blade.Playing = true
				
				w_on.OnServerEvent:Connect(function()
					w = true
				end)
				w_off.OnServerEvent:Connect(function()
					w = false
				end)
				a_on.OnServerEvent:Connect(function()
					a = true
				end)
				a_off.OnServerEvent:Connect(function()
					a = false
				end)
				s_on.OnServerEvent:Connect(function()
					s = true
				end)
				s_off.OnServerEvent:Connect(function()
					s = false
				end)
				d_on.OnServerEvent:Connect(function()
					d = true
				end)
				d_off.OnServerEvent:Connect(function()
					d = false
				end)
				e_on.OnServerEvent:Connect(function()
					e = true
				end)
				e_off.OnServerEvent:Connect(function()
					e = false
				end)
				q_on.OnServerEvent:Connect(function()
					q = true
				end)
				q_off.OnServerEvent:Connect(function()
					q = false
				end)
				
				local frc = Instance.new("BodyForce", body)
				
				while megy do
					wait(0.05)
					if w and not s then
						frc.Force = Vector3.new(body.Part.CFrame.LookVector.X,0,body.Part.CFrame.LookVector.Z) * 30000
					end
					if s and not w then
						frc.Force = Vector3.new(body.Part.CFrame.LookVector.X,0,body.Part.CFrame.LookVector.Z) * -30000
					end
					if a and not d then
						steer.AngularVelocity = 10000
					end
					if d and not a then
						steer.AngularVelocity = -10000
					end
					if e and not q then
						frc.Force = Vector3.new(frc.Force.X,suly + 50000,frc.Force.Z)
					end
					if q and not e then
						frc.Force = Vector3.new(frc.Force.X,suly - 10000,frc.Force.Z)
					end
					
					if not w and not s then
						frc.Force = Vector3.new(0,frc.Force.Y,0)
					end
					if not a and not d then
						steer.AngularVelocity = 0
					end
					if not e and not q then
						frc.Force = Vector3.new(frc.Force.X,suly,frc.Force.Z)
					end
					
					fram.spd.Text = "SPD: "..math.round(body.driver.Velocity.Magnitude * 0.2777160632).." kn"
					fram.alt.Text = "ALT: "..math.round(body.driver.Position.Y * 0.4686914137).." f"
					fram.cord.Text = "CRD: "..math.round(body.driver.Position.X)..", "..math.round(body.driver.Position.Z)
				end
				
				leall()
			else
				megy = false
			end
		end
	else
		if megy then
			leall()
		end
	end
end)

Hiyshhiysh · September 26, 2023, 5:57pm

And I assume the speedometer is just the default one given when sitting on VehicleSeats?
EDIT: Oh wait, I found the speedometer script in the code. Lemme have a look…

Hiyshhiysh · September 26, 2023, 6:09pm

Try removing the line that sets the speed and add this to the bottom of the code, idk if it will work:


local LastBodyPos = body.driver.Position
game:GetService("RunService").Heartbeat:Connect(function()
        fram.spd.Text = "SPD: "..math.round((LastBodyPos - body.driver.Position).Magnitude * 0.2777160632).." kn"
        LastBodyPos = body.driver.Position
)

As I said, I don’t know if it will work but it’s probably worth a try

RedstoneGyerek · September 26, 2023, 6:32pm

got it like this

while megy do
		wait(0.05)
		local lastpos = body.driver.Position
		
		if w and not s then
			frc.Force = Vector3.new(body.Part.CFrame.LookVector.X,0,body.Part.CFrame.LookVector.Z) * 30000
		end
		if s and not w then
			frc.Force = Vector3.new(body.Part.CFrame.LookVector.X,0,body.Part.CFrame.LookVector.Z) * -30000
		end
		if a and not d then
			steer.AngularVelocity = 10000
		end
		if d and not a then
			steer.AngularVelocity = -10000
		end
		if e and not q then
			frc.Force = Vector3.new(frc.Force.X,suly + 50000,frc.Force.Z)
		end
		if q and not e then
			frc.Force = Vector3.new(frc.Force.X,suly - 10000,frc.Force.Z)
		end
		
		if not w and not s then
			frc.Force = Vector3.new(0,frc.Force.Y,0)
		end
		if not a and not d then
			steer.AngularVelocity = 0
		end
		if not e and not q then
			frc.Force = Vector3.new(frc.Force.X,suly,frc.Force.Z)
		end
		
		wait(0.05)
		fram.spd.Text = "SPD: "..math.round((lastpos - body.driver.Position).Magnitude * 0.2777160632 * 20).." kn"
		fram.alt.Text = "ALT: "..math.round(body.driver.Position.Y * 0.4686914137).." f"
		fram.cord.Text = "CRD: "..math.round(body.driver.Position.X)..", "..math.round(body.driver.Position.Z)
end

ill test it with another player to see if the body vibrates or not
thanks for the help so far

RedstoneGyerek · September 27, 2023, 8:36am

robloxapp-20230927-1032503.wmv (1.7 MB)

Hiyshhiysh · September 27, 2023, 2:13pm

Hmmm… thats very strange behaviour. I don’t know much about the physics engine so I can’t really help you any more. Sorry D:

RedstoneGyerek · September 30, 2023, 2:39pm

anyone got a solution? because i still dont

RedstoneGyerek · October 12, 2023, 2:54pm

guess ill figure it out myself