Ejemplo n.º 1
0
    // 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);
        }
    }