PGiZ1/Assets/Code/Gameplay/AICarController.cs

using UnityEngine;

namespace Code.Gameplay
{
    public class AICarController : MonoBehaviour
    {
        [SerializeField] public float speed = 15f;
        [SerializeField] private float stoppingDistance = 2f;
        [SerializeField] private float turnSpeed = 3f;

        private Vector3[] _waypoints;
        private int _currentWaypointIndex;
        
        private bool _isStopped;

        public void SetRoute(Vector3[] waypoints)
        {
            _waypoints = waypoints;
            _currentWaypointIndex = 0;
        }

        private void Update()
        {
            if (_waypoints == null || _waypoints.Length == 0 || _isStopped) return;

            if (_currentWaypointIndex >= _waypoints.Length - 1)
            {
                var raceManager = FindFirstObjectByType<RaceManager>();
                raceManager?.OnLoose();
                _isStopped = true;
            }

            var target = _waypoints[_currentWaypointIndex];
            var direction = target - transform.position;

            if (direction.magnitude > 0.1f)
            {
                var targetRotation = Quaternion.LookRotation(direction, Vector3.up);
                transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, turnSpeed * Time.deltaTime);
            }

            transform.Translate(Vector3.forward * (speed * Time.deltaTime), Space.Self);

            if (direction.magnitude < stoppingDistance)
            {
                _currentWaypointIndex = (_currentWaypointIndex + 1) % _waypoints.Length;
            }
        }
    }
}