// Use this for initialization
void Start()
{
player = GameObject.FindGameObjectWithTag("Player");
buddy = GameObject.FindGameObjectWithTag("buddy");
state = ELEMENTAL_STATE.GUARDING;
anim = GetComponent <Animator>();
agent = GetComponent <NavMeshAgent>();
elementalCurrentHealth = GetComponent <EnemyHealth>().enemyHealth;
healthManager = GameObject.FindGameObjectWithTag("GUI_Controller");
}
// Update is called once per frame
void Update()
{
/*
* Here I calculate the distance to the player, to the players buddy, and to the object that the enemy has been
* assigned to guard.
*/
distanceToBuddy = Vector3.Distance(transform.position, buddy.transform.position);
distanceToPlayer = Vector3.Distance(transform.position, player.transform.position);
distanceToObjectToGuard = Vector3.Distance(transform.position, objectToGuard.transform.position);
elementalCurrentHealth = GetComponent <EnemyHealth>().enemyHealth; //reference to the enemys health
if (elementalCurrentHealth <= 0)
{
state = ELEMENTAL_STATE.DEAD;
}
/*
* Here I cast a raycast to both the player and the players buddy.
*/
Vector3 castToPlayer = player.transform.position - transform.position;
Vector3 castToBuddy = buddy.transform.position - transform.position;
Vector3 raycastStartPosition = new Vector3(transform.position.x, transform.position.y + 1, transform.position.z);
if (Physics.Raycast(raycastStartPosition, castToPlayer, out hit))
{
if (hit.collider.gameObject.tag == "Player")
{
/*
* If the raycast hits the player, that means this enemy can see the player, and so it changes its state
* to ATTACK
*/
if (distanceToPlayer <= 30)
{
if (state != ELEMENTAL_STATE.DEAD)
{
state = ELEMENTAL_STATE.ATTACKING;
}
}
}
}
/*
* If the enemys raycast hits the players buddy, then it can see the buddy and changes its state to ATTACK
*/
if (Physics.Raycast(raycastStartPosition, castToBuddy, out hit))
{
if (hit.collider.gameObject.tag == "buddy")
{
if (distanceToBuddy <= 30)
{
if (state != ELEMENTAL_STATE.DEAD)
{
state = ELEMENTAL_STATE.ATTACKING;
}
}
}
}
/*
* I draw the raycasts for debugging purposes in the Editor
*/
Debug.DrawRay(raycastStartPosition, castToPlayer, Color.blue);
Debug.DrawRay(raycastStartPosition, castToBuddy, Color.blue);
/*
* When GUARDING, the enemy checks its distance to the object it is meant to guard. If it is too far away, it
* will move back to the object. If it is near the object, it will continue to guard the object while keeping
* an eye out for the player and its buddy
*/
switch (state)
{
case ELEMENTAL_STATE.GUARDING:
if (distanceToObjectToGuard >= 15)
{
agent.SetDestination(objectToGuard.transform.position);
anim.SetBool("Moving", true);
}
if (distanceToObjectToGuard <= 15)
{
anim.SetBool("Moving", false);
}
break;
/*
* When ATTACKING, it is possible that the enemy can see both the player and the players buddy at the same
* time. So I calculate which enemy is closer using the Mathf.Min function. I then set the enmy to attack
* whichever is closer, the player or the buddy as that is the one that is the biggest threat.
*/
case ELEMENTAL_STATE.ATTACKING:
anim.SetBool("Moving", true);
float distanceToClosestFoe = Mathf.Min(distanceToBuddy, distanceToPlayer);
if (distanceToClosestFoe == distanceToBuddy)
{
agent.SetDestination(buddy.transform.position);
}
if (distanceToClosestFoe == distanceToPlayer)
{
agent.SetDestination(player.transform.position);
}
if (distanceToClosestFoe >= 20)
{
state = ELEMENTAL_STATE.GUARDING;
}
/*
* Goes berserk if the player or his buddy is near. The code below makes the enemy choose any attack
* animation from a number of possible ones.
*/
if (distanceToClosestFoe <= 8)
{
string attackTriggers = string.Format("Attack {0}", Random.Range((int)1, (int)4));
anim.SetTrigger(string.Format("Attack {0}", Random.Range((int)1, (int)4)));
}
/*
* Here the enemy damages the player and the players buddy if they are in range of its attack
*/
if (distanceToBuddy <= 5)
{
healthManager.SendMessage("BuddyTakeDamage", damage, SendMessageOptions.DontRequireReceiver);
}
if (distanceToPlayer <= 5)
{
healthManager.SendMessage("PlayerTakeDamage", damage, SendMessageOptions.DontRequireReceiver);
}
//Debug.Log("Distance to closest foe is " + distanceToClosestFoe);
break;
/*
* Enemy is dead if it enters this state
*/
case ELEMENTAL_STATE.DEAD:
collider.enabled = false;
anim.SetTrigger("Die");
StartCoroutine("Die");
break;
}
}