Enum_RayCast.cs

using UnityEngine;


public class AI_StateMachine : MonoBehaviour {

    public Transform[] target;
    public GameObject player;
    private int destPoint = 0;
    NavMeshAgent agent;
    private float distance = 0.0f;
    private float sightRange = 15f;
    private Renderer myColor;
    public Light flashLight;


    public enum EnemyState {
        Patrol,
        Chase,

    }

    EnemyState _state;

    private void Look() {


        distance = Vector3.Distance(player.transform.position, agent.transform.position);

        RaycastHit hit;
        if (Physics.Raycast(gameObject.transform.position, gameObject.transform.forward, out hit, sightRange) && hit.collider.CompareTag("Player")) {
            //enemy.chaseTarget = hit.transform;
            _state = EnemyState.Chase;
        }
        if (distance > 6.0f) {
            _state = EnemyState.Patrol;
            
        }

        flashLight.range = hit.distance;

    }


    void Start () {

        _state = EnemyState.Patrol;
        agent = GetComponent<NavMeshAgent>();
        player = GameObject.FindGameObjectWithTag("Player");
        myColor = gameObject.GetComponent<Renderer>();
        flashLight = gameObject.GetComponentInChildren<Light>();

        // Disabling auto-braking allows for continuous movement between points
        agent.autoBraking = false;

        if(_state == EnemyState.Patrol) {
            GotoNextPath();
        }

    }

	void Update () {

        Look();

        switch (_state) {

            case EnemyState.Patrol:

                myColor.material.color = Color.green;
                if (agent.remainingDistance < 0.5f)
                    GotoNextPath();
                break;

            case EnemyState.Chase:

                myColor.material.color = Color.red;
                agent.destination = player.transform.position;
                break;
        }

    

    }

    void GotoNextPath() {

        // Returns if no points have been set up
        if (target.Length == 0)
            return;

        // Set the agent to go to the currently selected destination.
        agent.destination = target[destPoint].position;

        // Choose the next point in the array as the destination,
        // cycling to the start if necessary.
        destPoint = (destPoint + 1) % target.Length;
    }
}