Tower Defense Game: Not working like it should

Unity Engine
,
1

Hello, I am new to Unity, especially 3D design and scripting. I have been following this video tutorial series(Will post in a minute) and 2 things are not working correctly that I am hoping someone might be able to help me out with: Turret rotating after enemies out of range | Shooting Method shooting when enemy is not targeted.

I do not understand why these do not work correct, maybe someone may be able to assist me, I will link both videos that matter below along with my code. Thanks!

Video: Turret Rotation:

Video: Turret Shooting:

My Script code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class turret : MonoBehaviour {

    [Header("Attributes")]
    private Transform target;
    public float range = 12f;
    public float fireRate = 1f;
    private float fireCountdown = 0f;
    [Header("Unity Setup Fields")]
    public string enemyTag = "Enemy";
    public Transform partToRotate;
    public GameObject bulletPrefab;
    public Transform firePoint;



    // Use this for initialization
    void Start () {
        InvokeRepeating("UpdateTarget", 0f, 0.5f);
    }

    void UpdateTarget()
    {
        //Creates an array with all of the current enemies inside of the game
        GameObject[] enemies = GameObject.FindGameObjectsWithTag(enemyTag);
        //Shortest enemy distance
        float shortestDistance = Mathf.Infinity;
        //Tells turret which is the closest enemy
        GameObject nearestEnemy = null;
        //Finds which enemy is the shortest distance
        foreach(GameObject enemy in enemies)
        {
            float distanceToEnemy = Vector3.Distance(transform.position, enemy.transform.position);
            if (distanceToEnemy < shortestDistance)
            {
                shortestDistance = distanceToEnemy;
                nearestEnemy = enemy;
            }
        }
        if (nearestEnemy != null && shortestDistance <= range)
        {
            target = nearestEnemy.transform;
        }

    }

   
    // Update is called once per frame
    void Update () {
        //If the target variable is equal to something, then does this
        if (target != null) //Had to make this != null or else it would not rotate
        {
           

            Vector3 dir = target.position - transform.position;
            Quaternion lookRotation = Quaternion.LookRotation(dir);
            Vector3 rotation = lookRotation.eulerAngles;
            partToRotate.rotation = Quaternion.Euler(0f, rotation.y, 0f); 
            return; //Would not read the code from where this was in the video below it


        }

        if (fireCountdown <= 0f)
        {
            Shoot();
            fireCountdown = 1f / fireRate;
        }

        fireCountdown -= Time.deltaTime;
    }

    void Shoot()
    {
        Instantiate(bulletPrefab, firePoint.position, firePoint.rotation);
    }




    void OnDrawGizmosSelected()
    {
        //Turret Range
        Gizmos.color = Color.red;
        Gizmos.DrawWireSphere(transform.position, range);
    }
}
2

your current logic:

void Update () {
        if (target != null)
        {
            // do stuff when you've got a target
        }
      
        // do stuff every frame
        Shoot();
       
    }

“but I only want to shoot when I’ve got a target”… solve for x

3

not full code, just showing the relevant logical steps, read the comments :slight_smile:

 void UpdateTarget() // called every 0.5 seconds
    {
        // clear nearestEnemy value
        GameObject nearestEnemy = null;
        foreach(GameObject enemy in enemies)
        {
                // set nearestEnemy value
                nearestEnemy = enemy;
        }
        if (nearestEnemy != null && shortestDistance <= range) // what happens to target if this is "false"??
        {
            // set target value
            target = nearestEnemy.transform;
        }
        /// else what?

    }
4

Ah man, That makes sense yes, I didn’t see it like that(I am pretty new at this stuff, thanks man XD