using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityStandardAssets.Characters.FirstPerson;
using UnityEngine.AI;
public class AIExample : MonoBehaviour {
public enum WanderType { Random, Waypoint};
public FirstPersonController fpsc;
public WanderType wanderType = WanderType.Random;
public float wanderSpeed = 4f;
public float chaseSpeed = 7f;
public float fov = 120f;
public float viewDistance = 10f;
public float wanderRadius = 7f;
public Transform[] waypoints; //Array of waypoints is only used when waypoint wandering is selected
private bool isAware = false;
private Vector3 wanderPoint;
private NavMeshAgent agent;
private Renderer renderer;
private int waypointIndex = 0;
private Animator animator;
public void Start()
{
agent = GetComponent<NavMeshAgent>();
renderer = GetComponent<Renderer>();
animator = GetComponentInChildren<Animator>();
wanderPoint = RandomWanderPoint();
}
public void Update()
{
if (isAware)
{
agent.SetDestination(fpsc.transform.position);
animator.SetBool("Aware", true);
agent.speed = chaseSpeed;
//renderer.material.color = Color.red;
} else
{
SearchForPlayer();
Wander();
animator.SetBool("Aware", false);
agent.speed = wanderSpeed;
//renderer.material.color = Color.blue;
}
}
public void SearchForPlayer()
{
if (Vector3.Angle(Vector3.forward, transform.InverseTransformPoint(fpsc.transform.position)) <
fov / 2f)
{
if (Vector3.Distance(fpsc.transform.position, transform.position) < viewDistance)
{
RaycastHit hit;
if (Physics.Linecast(transform.position, fpsc.transform.position, out hit, -1))
{
if (hit.transform.CompareTag("Player"))
{
OnAware();
}
}
}
}
}
public void OnAware()
{
isAware = true;
}
public void Wander()
{
if (wanderType == WanderType.Random)
{
if (Vector3.Distance(transform.position, wanderPoint) < 2f)
{
wanderPoint = RandomWanderPoint();
}
else
{
agent.SetDestination(wanderPoint);
}
}
else
{
//Waypoint wandering
if (waypoints.Length >= 2)
{
if (Vector3.Distance(waypoints[waypointIndex].position, transform.position) < 2f)
{
if (waypointIndex == waypoints.Length - 1)
{
waypointIndex = 0;
}
else
{
waypointIndex++;
}
}
else
{
agent.SetDestination(waypoints[waypointIndex].position);
}
} else
{
Debug.LogWarning("Please assign more than 1 waypoint to the AI: " + gameObject.name);
}
}
}
public Vector3 RandomWanderPoint()
{
Vector3 randomPoint = (Random.insideUnitSphere * wanderRadius) + transform.position;
NavMeshHit navHit;
NavMesh.SamplePosition(randomPoint, out navHit, wanderRadius, -1);
return new Vector3(navHit.position.x, transform.position.y, navHit.position.z);
}
}
