Object Reference problem - Calling method from another script

Hello community!

I have a script Called **Projectile** where I have some code in order to be able to do object pooling from it and in my **Character Controller Script** I have set a quick test when I press Z to try things out and see if the calling method works but I get the object reference not set and I can't figure my way out of it.

Can anyone help me out please?

Code (CSharp):

1.     public class Projectile : MonoBehaviour
2.     {
3.         public Transform target;
4.  
5.         public float moveSpeed = 100f;          // speed at which the projtive moves towards the target
6.         public float rotationSpeed = 10f;      // speed at which the project rotates towards the target
7.         public float shootTime = 1f;
8.  
9.         public bool updateRotation = false;     // whether or not the projectile should continue to update its rotation after it was spawned
10.         public int pooledAmount = 3;         // max amount of arrows that will be able to be shoot at once
11.  
12.         public GameObject arrow;
13.         public List<GameObject> arrows;            // create a list containing all the arrows that will be allocated to memory once it starts
14.  
15.         void Start()
16.         {
17.             transform.LookAt(target);   // set the default direction of the projectile to face towards the target
18.             arrows = new List<GameObject>();
19.             for (int i = 0; i < pooledAmount; i++)
20.             {
21.                 GameObject obj = (GameObject)Instantiate(arrow);
22.                 obj.SetActive(false);
23.                 arrows.Add(obj);
24.             }
25.         }
26.  
27.         void Update()
28.         {
29.             Rotate();
30.             Move();
31.         }
32.  
33.         /// <summary>
34.         /// Rotates the projectile towards the target.
35.         /// </summary>
36.         void Rotate()
37.         {
38.             Vector3 targetPosition = target.position - transform.position;
39.  
40.             float speed = rotationSpeed * Time.deltaTime;
41.  
42.             Vector3 targetDirection = Vector3.RotateTowards(transform.forward, targetPosition, speed, 0);
43.  
44.             transform.rotation = Quaternion.LookRotation(targetDirection);
45.         }
46.  
47.         /// <summary>
48.         /// Move the projectile towards the target.
49.         /// </summary>
50.         void Move()
51.         {
52.             transform.position = Vector3.MoveTowards(transform.position, target.position, moveSpeed * Time.deltaTime);
53.         }
54.  
55.         /// <summary>
56.         /// "Destorys" the object
57.         /// </summary>
58.         void OnEnable ()
59.         {
60.             Invoke("Destroy", 2f);
61.         }
62.         void Destory ()
63.         {
64.             gameObject.SetActive(false);
65.         }
66.         void OnDisable ()
67.         {
68.             CancelInvoke();
69.         }
70.  
71.         public void Fire()
72.         {
73.             for (int i = 0; i < arrows.Count; i++)     // loops through the list
74.             {
75.                 if (!arrows[i].activeInHierarchy)      // if the arrow is not currently active (looking for inactive arrows)
76.                 {
77.                     arrows[i].transform.position = transform.position;
78.                     arrows[i].transform.rotation = Quaternion.identity;
79.                     arrows[i].SetActive(true);
80.                     break;
81.                 }
82.             }
83.         }
84.     }

Script where I try to call the method FIRE from the previous one:

Code (CSharp):

1. public class Player_ClickToMove : MonoBehaviour
2.     {
3.         public Projectile projectileScript;
4.  
5.         public GameObject target;
6.  
7.         public GameObject arrowTest;
8.         public Transform arrowTargetTest;
9.  
10.         void Awake ()
11.         {
12.             projectileScript = GetComponent<Projectile>();
13.         }
14.  
15.                 if (Input.GetKeyDown(KeyCode.Z))
16.                 {
17.                     projectileScript.GetComponent<Projectile>().Fire();
18.                     Debug.Log("Shooted");
19.                 }
20.             }
21.         }

 

You are calling fire on awake. Meaning it is attempting to run before the start method is called, so arrows hasn't been initialized yet, so it is null.

 

Thank you @zombiegorilla .

Managed to get it to work.