// Brake if (Input.GetKey(KeyCode.Space)) rb.AddForce(-transform.forward * brakeForce, ForceMode.Force);
if (wheel == wheelColliders[2]
Before diving into code, you need to understand the forces at play when a car descends a hill: drive cars down a hill script
// Apply to wheels (assuming rear drive) foreach (var wheel in wheelColliders)
float steerAngle = steerInput * maxSteerAngle; Vector3 localVel = transform.InverseTransformDirection(rb.velocity); float turnTorque = steerAngle * steerSpeed * localVel.z; rb.AddTorque(Vector3.up * turnTorque); // Brake if (Input
foreach (var wheel in wheelColliders)
Inject an artificial downward force vector (colloquially called "sticky downforce") that scales linearly with the car's current velocity. High frame rates fighting physics updates. Attach a Rigidbody to your car GameObject
: To prevent the car from rolling over on steep descents, set a low centerOfMass in your script. 3. Gameplay Mechanics to Add
-- Input local ContextActionService = game:GetService("ContextActionService") local function handle(action, state, obj) if action == "forward" then throttle = (state == Enum.UserInputState.Begin and 1 or 0) end if action == "back" then brake = (state == Enum.UserInputState.Begin and 1 or 0) end if action == "left" then steer = (state == Enum.UserInputState.Begin and -0.8 or 0) end if action == "right" then steer = (state == Enum.UserInputState.Begin and 0.8 or 0) end end ContextActionService:BindAction("drive", handle, false, Enum.KeyCode.W, "forward") ContextActionService:BindAction("drive", handle, false, Enum.KeyCode.S, "back") ContextActionService:BindAction("drive", handle, false, Enum.KeyCode.A, "left") ContextActionService:BindAction("drive", handle, false, Enum.KeyCode.D, "right")
UCLASS() class MYGAME_API AHillVehicle : public AWheeledVehiclePawn
For a more realistic, production-grade simulation in Unity, we utilize the Rigidbody component. Instead of manually forcing positions, this script calculates the slope angle and alters the center of mass to ensure the car stays glued to the hill. Attach a Rigidbody to your car GameObject. Set the Rigidbody's Collision Detection to . Attach this script to your car.