// Update is called once per frame
void Update()
{
if (zombie_state == ZombieState.PATROL)
{
nav_mesh_agent.isStopped = false;
nav_mesh_agent.speed = walking_velocity;
patrolling_timer += Time.deltaTime;
if (patrolling_timer > patrolling_duration)
{
// SetNewRandomDestination();
float random_radius = Random.Range(minimum_patrol_radius, maximum_patrol_radius);
Vector3 random_direction = Random.insideUnitSphere * random_radius;
random_direction = random_direction + transform.position;
NavMeshHit navigational_hit_point;
NavMesh.SamplePosition(random_direction, out navigational_hit_point, random_radius, -1);
nav_mesh_agent.SetDestination(navigational_hit_point.position);
// end of SetNewRandomDestionation function
patrolling_timer = 0f;
}
if (nav_mesh_agent.velocity.sqrMagnitude > 0)
{
enemy_animation_controller.WalkingMotion(true);
}
else
{
enemy_animation_controller.WalkingMotion(false);
}
// test the distance between the player and the enemy
if (Vector3.Distance(transform.position, enemy_target.position) <= max_proximity)
{
enemy_animation_controller.WalkingMotion(false);
zombie_state = ZombieState.CHASE;
// play spotted audio
enemy_sound.Screaming_Sound();
}
}
if (zombie_state == ZombieState.CHASE)
{
nav_mesh_agent.isStopped = false;
nav_mesh_agent.speed = running_velocity;
nav_mesh_agent.SetDestination(enemy_target.position); //enemy run towards player
if (nav_mesh_agent.velocity.sqrMagnitude > 0)
{
enemy_animation_controller.RunningMotion(true);
}
else
{
enemy_animation_controller.RunningMotion(false);
}
if (Vector3.Distance(transform.position, enemy_target.position) <= attack_distance)
{
enemy_animation_controller.RunningMotion(false);
enemy_animation_controller.WalkingMotion(false);
zombie_state = ZombieState.ATTACK;
if (max_proximity != current_proximity)
{
max_proximity = current_proximity;
}
}
else if (Vector3.Distance(transform.position, enemy_target.position) > max_proximity)
{
enemy_animation_controller.RunningMotion(false);
zombie_state = ZombieState.PATROL;
patrolling_timer = patrolling_duration;
if (max_proximity != current_proximity)
{
max_proximity = current_proximity;
}
}
}
if (zombie_state == ZombieState.ATTACK)
{
nav_mesh_agent.isStopped = true;
nav_mesh_agent.velocity = Vector3.zero;
attack_timer += Time.deltaTime;
if (attack_timer > attack_delay)
{
enemy_animation_controller.AttackingMotion();
attack_timer = 0f;
// play attack sound
enemy_sound.Attacking_Sound();
}
// To give spacing for the player to make a run if zombie is next to the player.
float player_run_distance = attack_distance; //+gap_distance_chase;
if (Vector3.Distance(transform.position, enemy_target.position) > player_run_distance)
{
zombie_state = ZombieState.CHASE;
}
// this.gameObject.transform.LookAt(2 * this.gameObject.transform.position - GameObject.Find("Player").transform.position);
// print("zombie y angle is: "+this.gameObject.transform.rotation.eulerAngles.y);
// print("player y angle is: "+GameObject.Find("Player").transform.rotation.eulerAngles.y);
// this.gameObject.transform.eulerAngles = new Vector3(this.gameObject.transform.eulerAngles.x, 180+GameObject.Find("Player").transform.rotation.eulerAngles.y, this.gameObject.transform.eulerAngles.z);
// Works but the enemy slightly leans off the player.
// Vector3 lookVector = enemy_target.transform.position - transform.position;
// lookVector.y = transform.position.y;
// Quaternion rot = Quaternion.LookRotation(lookVector);
// transform.rotation = Quaternion.Slerp(transform.rotation, rot, 1);
}
}