(REPOST) Advanced plane system Vertical Velocity and Foreward Velocity error

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#1

– this is reposted because i have not got any help in 30 minutes and no one responded

Hello! Nathan here! Im currently experincing errors with my plane system script, where you cant go foreward nor backward, up nor down! even tho everything is correctly made! this script is currently in v1 so it has some bugs but the biggest one is that i (Again) cant go up down foreward backward and i cant seem to fix it even after lots of debugging! you can try it out, i can provide file of the roblox studio if needed

Heres the script (If local script needed i can show it)

local Event = script:WaitForChild("Control")
local RS = game:GetService("RunService")

-- constants, you know, the basics
local drag = 0.98 -- drag to slow things down a bit
local maxForwardSpeed = 100 -- max speed going forward
local maxVerticalSpeed = 50 -- max speed going up or down
local maxAngularVelocity = 100 -- how fast the plane can spin
local accelerationRate = 10 -- how quickly stuff speeds up

-- control states, like a list of what's going on with the plane
local controlState = {
	Left = false, -- roll left
	Right = false, -- roll right
	YawLeft = false, -- yaw left (Q)
	YawRight = false, -- yaw right (E)
	Up = false, -- go up (W)
	Down = false, -- go down (S)
	ThrottleUp = false, -- throttle up (R)
	ThrottleDown = false -- throttle down (F)
}

-- movement/rotation variables
local forwardVelocity = 0 -- how fast we're going forward
local verticalVelocity = 0 -- how fast we're going up/down
local angularVelocity = 0 -- how much we're spinning (roll)
local yawVelocity = 0 -- how much we're turning left or right (yaw)
local throttleMultiplier = 0 -- speed boost for going forward

-- setting up smooth rotation with BodyGyro
local plane = script.Parent
local bodyGyro = Instance.new("BodyGyro")
bodyGyro.CFrame = plane.PrimaryPart.CFrame
bodyGyro.MaxTorque = Vector3.new(math.huge, math.huge, math.huge)
bodyGyro.P = 3000
bodyGyro.D = 200
bodyGyro.Parent = plane.PrimaryPart

-- setting up smooth movement with BodyVelocity
local bodyVelocity = Instance.new("BodyVelocity")
bodyVelocity.MaxForce = Vector3.new(50000, 50000, 50000) -- max force to move the plane
bodyVelocity.Parent = plane.PrimaryPart

-- handling control updates from the event
Event.OnServerEvent:Connect(function(player, ControlType, Do)
	if ControlType and Do ~= nil then
		controlState[ControlType] = Do
	end
end)

-- updating plane's movement and rotation every frame
RS.Heartbeat:Connect(function(deltaTime)
	-- rolling (spinning around)
	if controlState.Left then
		angularVelocity = math.clamp(angularVelocity + accelerationRate * deltaTime, -maxAngularVelocity, maxAngularVelocity)
	elseif controlState.Right then
		angularVelocity = math.clamp(angularVelocity - accelerationRate * deltaTime, -maxAngularVelocity, maxAngularVelocity)
	else
		angularVelocity = angularVelocity * drag
		if math.abs(angularVelocity) < 0.01 then
			angularVelocity = 0
		end
	end

	-- yawing (turning left or right)
	if controlState.YawLeft then
		yawVelocity = math.clamp(yawVelocity + accelerationRate * deltaTime, -maxAngularVelocity, maxAngularVelocity)
	elseif controlState.YawRight then
		yawVelocity = math.clamp(yawVelocity - accelerationRate * deltaTime, -maxAngularVelocity, maxAngularVelocity)
	else
		yawVelocity = yawVelocity * drag
		if math.abs(yawVelocity) < 0.01 then
			yawVelocity = 0
		end
	end

	-- vertical movement (up/down)
	if controlState.Up then
		verticalVelocity = math.clamp(verticalVelocity + accelerationRate * deltaTime, -maxVerticalSpeed, maxVerticalSpeed)
	elseif controlState.Down then
		verticalVelocity = math.clamp(verticalVelocity - accelerationRate * deltaTime, -maxVerticalSpeed, maxVerticalSpeed)
	else
		verticalVelocity = verticalVelocity * drag
		if math.abs(verticalVelocity) < 0.1 then
			verticalVelocity = 0
		end
	end

	-- throttle (forward/backward)
	if controlState.ThrottleUp then
		-- speed up forward gradually
		throttleMultiplier = throttleMultiplier + accelerationRate * deltaTime
		forwardVelocity = math.min(forwardVelocity + throttleMultiplier * deltaTime, maxForwardSpeed)
	elseif controlState.ThrottleDown then
		-- slow down or go backwards
		forwardVelocity = forwardVelocity - accelerationRate * deltaTime
		forwardVelocity = math.max(forwardVelocity, -maxForwardSpeed) -- limit backward speed
		throttleMultiplier = 0 -- no forward speed boost when going backward
	else
		-- drag to slow down if there's no throttle
		forwardVelocity = forwardVelocity * drag
		if math.abs(forwardVelocity) < 0.1 then
			forwardVelocity = 0
		end
	end

	-- apply the movement to the plane
	bodyVelocity.Velocity = plane.PrimaryPart.CFrame:VectorToWorldSpace(Vector3.new(forwardVelocity, verticalVelocity, 0))

	-- apply rotation to the plane
	local currentCFrame = plane.PrimaryPart.CFrame
	bodyGyro.CFrame = currentCFrame * CFrame.Angles(0, math.rad(yawVelocity) * deltaTime, math.rad(angularVelocity) * deltaTime)

	-- debugging stuff (you can remove this later)
	print("Forward Velocity:", forwardVelocity, "Vertical Velocity:", verticalVelocity)
	print("Angular Velocity:", angularVelocity, "Yaw Velocity:", yawVelocity)
end)
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