/// <summary>
/// Init the robot to its starting state
/// </summary>
public void Init(ushort index, Vector3 position, float speed)
{
Index = index;
transform.position = position;
transform.rotation = Quaternion.identity;
health = MAX_HEALTH;
searchTimer = 0;
attackTimer = 0;
agent.speed = speed;
currentState = RobotState.Moving;
currentAttackState = RobotAttackState.Charging;
Target = GameManager.Instance.player;
gameObject.SetActive(true);
hitboxObj.SetActive(false);
}
// Update is called once per frame
void Update()
{
if (GameManager.Instance.CurrentState != GameState.Playing)
{
if (!agent.isStopped)
{
agent.isStopped = true;
}
return;
}
if (agent.isStopped)
{
agent.isStopped = false;
}
switch (currentState)
{
case RobotState.Moving:
searchTimer += Time.deltaTime;
attackTimer += Time.deltaTime;
//Search for a nearby tower
if (searchTimer > SEARCH_TIMER_MAX)
{
searchTimer -= SEARCH_TIMER_MAX;
Targetable newTarget = FindTarget();
if (newTarget != null)
{
Target = newTarget;
agent.destination = Target.transform.position;
}
}
//Find a new target because this one died
if (Target == null)
{
//If still null, assign to player
if ((Target = FindTarget()) == null)
{
Target = GameManager.Instance.player;
}
agent.destination = Target.transform.position;
}
//The target is moveable, so continuously update the position
else if (Target.IsMoveable)
{
agent.destination = Target.transform.position;
}
//Activate attack if we can
if (attackTimer > ATTACK_TIMER_MAX &&
Vector3.SqrMagnitude(transform.position - Target.transform.position) <= ATTACK_RANGE)
{
attackTimer = 0;
currentState = RobotState.Attacking;
currentAttackState = RobotAttackState.Charging;
agent.isStopped = true;
}
break;
case RobotState.Attacking:
switch (currentAttackState)
{
//Charge up the attack
case RobotAttackState.Charging:
attackTimer += Time.deltaTime;
//Find a new target because this one died
if (Target == null)
{
//If still null, assign to player
if ((Target = FindTarget()) == null)
{
Target = GameManager.Instance.player;
}
agent.destination = Target.transform.position;
}
//Rotate towards target
Vector3 direction = (Target.transform.position - transform.position).normalized;
Quaternion lookRotation = Quaternion.LookRotation(new Vector3(direction.x, 0, direction.z));
transform.rotation = Quaternion.Slerp(transform.rotation, lookRotation, Time.deltaTime * CHARGE_ROTATION_SPEED);
if (attackTimer > CHARGE_TIMER_MAX)
{
attackDirection = transform.forward;
attackTimer = 0;
hitboxObj.SetActive(true);
currentAttackState = RobotAttackState.Performing;
}
break;
//Perform the actual attack
case RobotAttackState.Performing:
attackTimer += Time.deltaTime;
//Move in attack direction
agent.velocity = attackDirection * PERFORM_MOVE_SPEED;
if (attackTimer > PERFORM_TIMER_MAX)
{
attackTimer = 0;
hitboxObj.SetActive(false);
currentAttackState = RobotAttackState.Recovery;
}
break;
//Recover from the attack
case RobotAttackState.Recovery:
attackTimer += Time.deltaTime;
if (attackTimer > RECOVERY_TIMER_MAX)
{
attackTimer = 0;
currentState = RobotState.Moving;
agent.isStopped = false;
}
break;
default:
break;
}
break;
//TODO: death animations?
case RobotState.Dying:
break;
default:
break;
}
}
