G’day,

So a lot of people like me are struggling to figure out how the jeep model (found in suburban) works and how it is scripted. Here are some of my questions on it

Here is what I have figured out so far:

The ‘Thruster’ parts of the car are welded to the wheels meaning as a Thruster part rises, the wheel rises. The configurations folder is a place where all the ‘settings’ of the jeep is found as well.

Now going into the ‘CarScript’

This is all the variables

```
--Scripted by DermonDarble
local car = script.Parent
local stats = car.Configurations
local Raycast = require(script.RaycastModule)
```

The pairs loops through all the BaseParts in the model and gets the mass and multiplies it by gravity then storing it in the mass variable for later use.

**What does this formula do?**

```
local mass = 0
for i, v in pairs(car:GetChildren()) do
if v:IsA("BasePart") then
mass = mass + (v:GetMass() * 196.2)
end
end
```

**What is the BodyPosition force used for?**

**What is the BodyGyro force used for?**

```
local bodyPosition = Instance.new("BodyPosition", car.Chassis)
bodyPosition.MaxForce = Vector3.new()
local bodyGyro = Instance.new("BodyGyro", car.Chassis)
bodyGyro.MaxTorque = Vector3.new()
```

**How does this function work? (Please explain simply)**

As far as I am aware, this function just updates the position of a Thruster

```
local function UpdateThruster(thruster)
-- Raycasting
local hit, position = Raycast.new(thruster.Position, thruster.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * stats.Height.Value) --game.Workspace:FindPartOnRay(ray, car)
local thrusterHeight = (position - thruster.Position).magnitude
-- Wheel
local wheelWeld = thruster:FindFirstChild("WheelWeld")
wheelWeld.C0 = CFrame.new(0, -math.min(thrusterHeight, stats.Height.Value * 0.8) + (wheelWeld.Part1.Size.Y / 2), 0)
-- Wheel turning
local offset = car.Chassis.CFrame:inverse() * thruster.CFrame
local speed = car.Chassis.CFrame:vectorToObjectSpace(car.Chassis.Velocity)
if offset.Z < 0 then
local direction = 1
if speed.Z > 0 then
direction = -1
end
wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(0, (car.Chassis.RotVelocity.Y / 2) * direction, 0)
end
-- Particles
if hit and thruster.Velocity.magnitude >= 5 then
wheelWeld.Part1.ParticleEmitter.Enabled = true
else
wheelWeld.Part1.ParticleEmitter.Enabled = false
end
end
```

**Not sure what this function does, neither do I know what the ‘LocalCarScript’ does, please explain (simply)**

```
car.DriveSeat.Changed:connect(function(property)
if property == "Occupant" then
if car.DriveSeat.Occupant then
local player = game.Players:GetPlayerFromCharacter(car.DriveSeat.Occupant.Parent)
if player then
car.DriveSeat:SetNetworkOwner(player)
local localCarScript = script.LocalCarScript:Clone()
localCarScript.Parent = player.PlayerGui
localCarScript.Car.Value = car
localCarScript.Disabled = false
end
end
end
end)
```

**What does this function do?**

```
spawn(function()
while true do
game:GetService("RunService").Stepped:wait()
for i, part in pairs(car:GetChildren()) do
if part.Name == "Thruster" then
UpdateThruster(part)
end
end
if car.DriveSeat.Occupant then
bodyPosition.MaxForce = Vector3.new()
bodyGyro.MaxTorque = Vector3.new()
else
local hit, position, normal = Raycast.new(car.Chassis.Position, car.Chassis.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * stats.Height.Value)
if hit and hit.CanCollide then
bodyPosition.MaxForce = Vector3.new(mass / 5, math.huge, mass / 5)
bodyPosition.Position = (CFrame.new(position, position + normal) * CFrame.new(0, 0, -stats.Height.Value + 0.5)).p
bodyGyro.MaxTorque = Vector3.new(math.huge, 0, math.huge)
bodyGyro.CFrame = CFrame.new(position, position + normal) * CFrame.Angles(-math.pi/2, 0, 0)
else
bodyPosition.MaxForce = Vector3.new()
bodyGyro.MaxTorque = Vector3.new()
end
end
end
end)
```

Here is the LocalCarScript

```
--Scripted by DermonDarble
local userInputService = game:GetService("UserInputService")
local camera = game.Workspace.CurrentCamera
local player = game.Players.LocalPlayer
local character = player.Character
local humanoidRootPart = character.HumanoidRootPart
local car = script:WaitForChild("Car").Value
local stats = car:WaitForChild("Configurations")
local Raycast = require(car.CarScript.RaycastModule)
local cameraType = Enum.CameraType.Follow
local movement = Vector2.new()
local seat = car:WaitForChild("DriveSeat")
seat.Changed:Connect(function(property)
if property == "Throttle" then
movement = Vector2.new(movement.X, seat.Throttle)
end
if property == "Steer" then
movement = Vector2.new(seat.Steer, movement.Y)
end
end)
local force = 0
local damping = 0
local mass = 0
for i, v in pairs(car:GetChildren()) do
if v:IsA("BasePart") then
mass = mass + (v:GetMass() * 196.2)
end
end
force = mass * stats.Suspension.Value
damping = force / stats.Bounce.Value
local bodyVelocity = Instance.new("BodyVelocity", car.Chassis)
bodyVelocity.velocity = Vector3.new(0, 0, 0)
bodyVelocity.maxForce = Vector3.new(0, 0, 0)
local bodyAngularVelocity = Instance.new("BodyAngularVelocity", car.Chassis)
bodyAngularVelocity.angularvelocity = Vector3.new(0, 0, 0)
bodyAngularVelocity.maxTorque = Vector3.new(0, 0, 0)
local rotation = 0
local function UpdateThruster(thruster)
--Make sure we have a bodythrust to move the wheel
local bodyThrust = thruster:FindFirstChild("BodyThrust")
if not bodyThrust then
bodyThrust = Instance.new("BodyThrust", thruster)
end
--Do some raycasting to get the height of the wheel
local hit, position = Raycast.new(thruster.Position, thruster.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * stats.Height.Value)
local thrusterHeight = (position - thruster.Position).magnitude
if hit and hit.CanCollide then
--If we're on the ground, apply some forces to push the wheel up
bodyThrust.force = Vector3.new(0, ((stats.Height.Value - thrusterHeight)^2) * (force / stats.Height.Value^2), 0)
local thrusterDamping = thruster.CFrame:toObjectSpace(CFrame.new(thruster.Velocity + thruster.Position)).p * damping
bodyThrust.force = bodyThrust.force - Vector3.new(0, thrusterDamping.Y, 0)
else
bodyThrust.force = Vector3.new(0, 0, 0)
end
--Wheels
local wheelWeld = thruster:FindFirstChild("WheelWeld")
if wheelWeld then
wheelWeld.C0 = CFrame.new(0, -math.min(thrusterHeight, stats.Height.Value * 0.8) + (wheelWeld.Part1.Size.Y / 2), 0)
-- Wheel turning
local offset = car.Chassis.CFrame:inverse() * thruster.CFrame
local speed = car.Chassis.CFrame:vectorToObjectSpace(car.Chassis.Velocity)
if offset.Z < 0 then
local direction = 1
if speed.Z > 0 then
direction = -1
end
wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(0, (car.Chassis.RotVelocity.Y / 2) * direction, 0)
end
wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(rotation, 0, 0)
end
end
--A simple function to check if the car is grounded
local function IsGrounded()
local hit, position = Raycast.new((car.Chassis.CFrame * CFrame.new(0, 0, (car.Chassis.Size.Z / 2) - 1)).p, car.Chassis.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * (stats.Height.Value + 0.2))
if hit and hit.CanCollide then
return(true)
end
return(false)
end
local oldCameraType = camera.CameraType
camera.CameraType = cameraType
spawn(function()
while character.Humanoid.SeatPart == car.DriveSeat do
game:GetService("RunService").RenderStepped:wait()
--Broken gyro input
--[[if userInputService.GyroscopeEnabled then
local inputObject, cframe = userInputService:GetDeviceRotation()
local up = cframe:vectorToWorldSpace(Vector3.new(0, 1, 0))
local angle = (1 - up.Y) * (math.abs(up.X) / up.X)
movement = Vector2.new(angle, movement.Y)
end]]
if IsGrounded() then
if movement.Y ~= 0 then
local velocity = car.Chassis.CFrame.lookVector * movement.Y * stats.Speed.Value
car.Chassis.Velocity = car.Chassis.Velocity:Lerp(velocity, 0.1)
bodyVelocity.maxForce = Vector3.new(0, 0, 0)
else
bodyVelocity.maxForce = Vector3.new(mass / 2, mass / 4, mass / 2)
end
local rotVelocity = car.Chassis.CFrame:vectorToWorldSpace(Vector3.new(movement.Y * stats.Speed.Value / 50, 0, -car.Chassis.RotVelocity.Y * 5 * movement.Y))
local speed = -car.Chassis.CFrame:vectorToObjectSpace(car.Chassis.Velocity).unit.Z
rotation = rotation + math.rad((-stats.Speed.Value / 5) * movement.Y)
if math.abs(speed) > 0.1 then
rotVelocity = rotVelocity + car.Chassis.CFrame:vectorToWorldSpace((Vector3.new(0, -movement.X * speed * stats.TurnSpeed.Value, 0)))
bodyAngularVelocity.maxTorque = Vector3.new(0, 0, 0)
else
bodyAngularVelocity.maxTorque = Vector3.new(mass / 4, mass / 2, mass / 4)
end
car.Chassis.RotVelocity = car.Chassis.RotVelocity:Lerp(rotVelocity, 0.1)
--bodyVelocity.maxForce = Vector3.new(mass / 3, mass / 6, mass / 3)
--bodyAngularVelocity.maxTorque = Vector3.new(mass / 6, mass / 3, mass / 6)
else
bodyVelocity.maxForce = Vector3.new(0, 0, 0)
bodyAngularVelocity.maxTorque = Vector3.new(0, 0, 0)
end
for i, part in pairs(car:GetChildren()) do
if part.Name == "Thruster" then
UpdateThruster(part)
end
end
end
for i, v in pairs(car:GetChildren()) do
if v:FindFirstChild("BodyThrust") then
v.BodyThrust:Destroy()
end
end
bodyVelocity:Destroy()
bodyAngularVelocity:Destroy()
camera.CameraType = oldCameraType
userInputService.ModalEnabled = false
script:Destroy()
end)
```

And the RaycastModule

```
local module = {}
function module.new(startPosition, startDirection)
local maxDistance = startDirection.magnitude
local direction = startDirection.unit
local lastPosition = startPosition
local distance = 0
local ignore = {}
local hit, position, normal
repeat
local ray = Ray.new(lastPosition, direction * (maxDistance - distance))
hit, position, normal = game.Workspace:FindPartOnRayWithIgnoreList(ray, ignore, false, true)
if hit then
if not hit.CanCollide then
table.insert(ignore, hit)
end
end
distance = (startPosition - position).magnitude
lastPosition = position
until distance >= maxDistance - 0.1 or (hit and hit.CanCollide)
return hit, position, normal
end
return module
```

**If someone could explain how all this works in clear steps, I know a lot of people would benefit from this. I myself have been struggling to understand how this works for ages, thanks SOOOOO much if you can get to me**