How do I stop my vehicle from flying randomly?

Help and Feedback Scripting Support
#1

Well, I have a vehicle that works fine but it basically doesn’t act like any other vehicle would and I don’t know how to implement it. When I press ‘W’, if it’s tilted, it keeps going up like there’s no gravity(there is gravity). How would I fix this problem?

Link: https://gyazo.com/f9d86b9c25691450f401384b2e635e06

3 Likes
#2

Well, it all depends on how you set up the object and how you move it around in the script.
Without more information or script snippets, it’s hard to help.

#3 
local CAS = game:GetService('ContextActionService')

local char = script.Parent
local humanoid = char:FindFirstChild('Humanoid')
local fwd = 0
local rote = 0
local key = Enum.KeyCode
local seat = nil

function MoveFwd(acName, acState)
	if acName == 'Forward' and acState == Enum.UserInputState.Begin then
		fwd = 10
	elseif acName == 'Backward' and acState == Enum.UserInputState.Begin then
		fwd = -10
	else
		fwd = 0
	end
end

function Rot(acName, acState)
	if acName == 'Left' and acState == Enum.UserInputState.Begin then
		rote = 5
	elseif acName == 'Right' and acState == Enum.UserInputState.Begin then
		rote = -5
	else
		rote = 0
	end
end

humanoid.seated:Connect(function(active, place)
	if active and place:IsA('VehicleSeat') then
		CAS:BindAction('Forward', MoveFwd, true, key['W'])
		CAS:BindAction('Backward', MoveFwd, true, key['S'])
		CAS:BindAction('Left', Rot, true, key['A'])
		CAS:BindAction('Right', Rot, true, key['D'])
		seat = place
	elseif not active then
		CAS:UnbindAction('Forward')
		CAS:UnbindAction('Backward')
		CAS:UnbindAction('Left')
		CAS:UnbindAction('Right')
		seat = nil
	end
end)

game:GetService('RunService').RenderStepped:Connect(function()
	if seat then 
		local bp = seat:WaitForChild('BodyPosition')
		local bg = seat:WaitForChild('BodyGyro')
		local vf = seat:WaitForChild('VectorForce')
		--local bv = seat:WaitForChild('BodyVelocity')
		local brightShell = seat.Parent:WaitForChild('BrightShell')
		
		bp.Position = seat.Position + (seat.CFrame.LookVector * fwd)
		bg.CFrame = seat.CFrame * CFrame.Angles(0, rote, 0)
		
	end
end)

I want to know how actual cars/tanks work. How would I implement this to roblox? Would a rotating wheel be enough to move the tank or does roblox physics work different?