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using UnityEngine;

public class TruckController : MonoBehaviour
{
    [Header("Wheel Colliders")]
    public WheelCollider frontLeftWheel;
    public WheelCollider frontRightWheel;
    public WheelCollider rearLeftWheel;
    public WheelCollider rearRightWheel;

[Header("Wheel Meshes")]
    public Transform frontLeftMesh;
    public Transform frontRightMesh;
    public Transform rearLeftMesh;
    public Transform rearRightMesh;

[Header("Truck Settings")]
    public float motorTorque = 1500f;
    public float brakeForce = 3000f;
    public float maxSteerAngle = 25f;
    public float maxSpeed = 80f; // km/h approx
    public float centerOfMassOffsetY = -0.5f;

private Rigidbody rb;
    private float currentMotor;
    private float currentBrake;
    private float currentSteer;

void Start()
    {
        rb = GetComponent<Rigidbody>();
        if (rb != null)
        {
            Vector3 com = rb.centerOfMass;
            com.y += centerOfMassOffsetY;
            rb.centerOfMass = com;
        }
    }

void Update()
    {
        HandleInput();
        LimitSpeed();
    }

void FixedUpdate()
    {
        ApplyMotor();
        ApplySteering();
        UpdateWheelVisuals(frontLeftWheel, frontLeftMesh);
        UpdateWheelVisuals(frontRightWheel, frontRightMesh);
        UpdateWheelVisuals(rearLeftWheel, rearLeftMesh);
        UpdateWheelVisuals(rearRightWheel, rearRightMesh);
    }

void HandleInput()
    {
        float vertical = Input.GetAxis("Vertical");   // W/S or Up/Down
        float horizontal = Input.GetAxis("Horizontal"); // A/D or Left/Right
        bool isBraking = Input.GetKey(KeyCode.Space);

currentMotor = vertical * motorTorque;
        currentSteer = horizontal * maxSteerAngle;
        currentBrake = isBraking ? brakeForce : 0f;
    }

void ApplyMotor()
    {
        // Rear-wheel drive
        rearLeftWheel.motorTorque = currentMotor;
        rearRightWheel.motorTorque = currentMotor;

rearLeftWheel.brakeTorque = currentBrake;
        rearRightWheel.brakeTorque = currentBrake;
        frontLeftWheel.brakeTorque = currentBrake;
        frontRightWheel.brakeTorque = currentBrake;
    }

void ApplySteering()
    {
        frontLeftWheel.steerAngle = currentSteer;
        frontRightWheel.steerAngle = currentSteer;
    }

void LimitSpeed()
    {
        if (rb == null) return;

float speed = rb.velocity.magnitude * 3.6f; // m/s to km/h
        if (speed > maxSpeed)
        {
            rb.velocity = rb.velocity.normalized * (maxSpeed / 3.6f);
        }
    }

void UpdateWheelVisuals(WheelCollider col, Transform mesh)
    {
        if (col == null || mesh == null) return;

Vector3 pos;
        Quaternion rot;
        col.GetWorldPose(out pos, out rot);
        mesh.position = pos;
        mesh.rotation = rot;
    }
}
 
using UnityEngine;

public class CameraFollow : MonoBehaviour
{
    public Transform target;
    public Vector3 offset = new Vector3(0f, 5f, -10f);
    public float followSpeed = 5f;
    public float rotateSpeed = 5f;

void LateUpdate()
    {
        if (target == null) return;

// Desired position
        Vector3 desiredPosition = target.TransformPoint(offset);
        transform.position = Vector3.Lerp(transform.position, desiredPosition, followSpeed * Time.deltaTime);

// Look at truck
        Quaternion desiredRotation = Quaternion.LookRotation(target.position - transform.position, Vector3.up);
        transform.rotation = Quaternion.Slerp(transform.rotation, desiredRotation, rotateSpeed * Time.deltaTime);
    }
}

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